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computer application major in computer, and graduation of undergraduate, requires the reference of the dissertation of the relevant professional aspects. The subject matter is not limited.
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The key technologies of computers continue to develop
It future computer technology will develop in the direction of ultra -high speed, ultra -small, parallel processing, and intelligent. Despite the constraints of the physical limit, the performance of the core component CPU of the core component of the computer with a silicon chip will continue to grow. As a model driven by Moore's law, the model of successful enterprises is expected to launch a microprocessor of 100 million transistors in 2001, and it is expected to launch a microprocessor integrating 1 billion transistors in 2010. Its performance is 100,000 mIPS (100 billion instructions instructions /second). The supercomputers of 1 million times per second will appear at the beginning of this century. Ultra -high -speed computers will use parallel processing technology to enable computer systems to perform multiple instructions at the same time or process multiple data at the same time. This is a key technology that improves computer structure and improves computer operation speed.
The computer will have more intelligent ingredients, which will have a variety of perception ability, certain thinking and judgment ability, and a certain natural language ability. In addition to providing natural input methods (such as voice input and handwriting input), various interactive devices that can produce the feeling of feeling in their realm have emerged. Virtual reality technology is a concentrated manifestation of the development of this field.
The traditional magnetic storage and disc storage capacity continued to rise. The new massive storage technology tended to mature. The storage capacity per cubic centimeter of the new memory can reach 10TB (300,000 words in a book, it can store about 15 million storage about 15 million This book). The permanent storage of information will also become a reality. Millennium memory is under development. Such a memory can resist interference, high temperature, shockproof, waterproof, and corrosion. If so, a large number of literatures today can be preserved in originality and flowing.
The new computer system is constantly emerging
The rapid development of silicon chip technology also means that silicon technology is getting closer to its physical limit. To this end, researchers from all over the world are stepping up research and development of new computers. The change of architecture to the device and the technical revolution must produce a quantity and even a quality leap. New quantum computers, photon computers, biomedical computers, nano computers, etc. will enter our lives in the 21st century and spread throughout all fields.
The quantum computers
The quantum computers are developed based on quantum effects. It uses the characteristics of a chain molecular polymer to represent the state of opening and passing. The information moves along the polymer to perform operations.
The data in the quantum computers is stored in quantum. Due to the quantum superposition effect, a quantum can be 0 or 1, or it can be stored both 0 and 1. Therefore, a quantum position can store 2 data. The same number of storage positions, the storage volume of quantum computers is much larger than usually computers. At the same time, quantum computers can implement quantum parallel computing, and its computing speed may be 1 billion times faster than the Pentium III chip of the current personal computer. There are three types of quantum computers currently under development: nuclear magnetic resonance (NMR) quantum computers, silicon -based semiconductor quantum computers, ion trap quantum computers. Quantum computers are expected to be popularized in 2030.
Themark computers
The photon computer is the full -light digital computer, replacing the electron with the photon, replacing the wire interconnection, and the light hardware instead of the electronic hardware in the computer.
Compared with electronic computers, the "wireless computer" information transmission of parallel channel density of the "wireless computer" information of the optical computer is extremely high. A prism with a diameter of 5 cents, its ability to pass through many times the existing telephone cables around the world. The parallel and high speed of light naturally determines that the parallel processing capacity of the optical computer is very strong and has a high -speed computing speed. Ultra -high -speed electronic computers can only work at low temperatures, while optical computers can work at room temperature. Light computers also have fault tolerance similar to the human brain. When a certain part in the system is damaged or errors, it does not affect the final calculation result.
At present, the world's first optical computer has been successfully developed by the European Community Britain, France, Belgium, Germany, and Italy. Its computing speed is 1,000 times faster than that of electronic computers. Scientists predict that the further development of optical computers will become one of the 21st century high -tech issues.
The biological computers (molecular computer)
The operating process of biological computers is the interaction process of protein molecules and surrounding physical chemical media. The conversion switch of the computer is acting by enzymes, and the program is extremely obvious in the structure of the enzyme synthesis system itself and the protein.
The 1970s, people found that deoxyrum ribosacuucleic acid (DNA) was in different states that can represent information or nothing. The genetic password in DNA molecules is equivalent to storing data. DNA molecules have changed from one gene to another gene code through biochemical reactions. The gene code before the reaction is equivalent to input data, and the gene code after the reaction is equivalent to the output data. If this reaction process can be controlled, you can make a successful DNA computer.
The protein molecules are much smaller than the electronic components on the silicon chip, and they are very close to each other. The biological computer completes an operation. The required time is only 10 microseconds, which is 1 million times faster than people's thinking speed. DNA molecular computers have amazing storage capacity. 1 cubic meters of DNA solution can store 1 trillion binary data. The energy consumed by DNA computers is very small, only one billionth of the electronic computer. Because the raw materials of biological chips are protein molecules, biological computers have both self -repairing functions and can be directly connected to biological living body. It is estimated that after 10 to 20 years, DNA computers will enter a practical stage.
nano computers
"nano" is a metering unit, a nanometer is equal to 10 [-9] meters, which is about 10 times the diameter of the hydrogen atom. Nano technology is a new cutting -edge scientific research field developed rapidly from the early 1980s. The ultimate goal is to manipulate a single atom directly according to their own will and create products with specific functions.
Mani technology is now starting from MEMS (microelectronics mechanical system) to put sensors, motors, and various processors on a silicon chip to form a system. Computer memory chips developed by nano -technology are only hundreds of atomic size, which is equivalent to one thousandth of the diameter of human hair. Not only does nano -computer consume any energy, but its performance is many times stronger than today's computers.
At present, the successful development of nano computers has some inspiring news. Researchers in HP laboratory have begun to apply nanotechnology to develop chips. Once their research is successful, it will be developed and produced for other micro -computers components. Pave the way.
The Internet network continues to spread and improve
Today people talk about the inevitable connection between the computer is connected with the network. On the one hand Extension of the network. The Internet that emerged in the 1990s has developed in full swing in the past, and its influence and popularity are unprecedented. There is never a technology that can change our learning, life and habits violently like Internet. Almost all countries around the world have computer networks directly or indirectly with Internet, making it a global computer Internet. People can communicate freely with other users in the world through Internet, and can obtain various information from the Internet.
Itly, if you look back at the development of my country's Internet, you can feel the popularity of the Internet. In the past three years, the survey of my country's Internet information Center (CNNIC) showed an explosive growth of my country's Internet development. , Top more; the number of users in my country in January 2000 was 8.9 million; the statistics in January 2001 were 22.5 million, which was close to three times; The monthly statistics are 122099, which is close to 3 times; the total capacity of the international line is currently 2799m, 8 times at 351m in January 2000.
people have fully appreciated the charm of the Internet. The Internet has greatly reduced the boundaries of time and space. Through the Internet, people can share computer hardware resources, software resources and information resources. The concept of "network is computer" has been repeatedly proven by the facts, and is gradually accepted by the world.
In the next 10 years, the establishment of a transparent full -light network is imperative, and the transmission rate of the Internet will increase by 100 times. Medical diagnosis, remote teaching, e -commerce, video conferences, video libraries, etc. will be popularized on the Internet. At the same time, the construction of wireless networks will become the main battlefield for many companies to compete. In the future, we can connect to the Internet through wireless access anytime, anywhere to communicate, obtain information, and watch TV programs.
Cope computing technology and system
With the rapid development and wide application of the Internet, the maturity of wireless mobile communication technology, and the continuous improvement of computer processing capabilities, new businesses and applications have continued to emerge. Mobile computing is proposed by improving work efficiency and being able to exchange and processing information at any time, and industry has become an important direction for industrial development.
Munning computing includes three elements: communication, computing and mobile. These three aspects are both independent and interconnected. Before the concept of mobile computing is proposed, people have been studying them for a long time, and mobile computing is the first time to combine them to study. They can transform each other, for example, the capacity of the communication system can be improved by calculating (source compression, channel encoding, cache, pre -collection).
The mobility can bring new applications to computing and communication, but it also brings many problems. The biggest problem is how to face the challenge brought by the wireless mobile environment. In the wireless mobile environment, the signal is affected by a variety of interference and decline, there will be multi -diameter and movement, bringing the signal to the time domain and frequency domain, frequent band resources, large transmission delay, etc. And other issues. In such an environment, many problems have not been encountered in mobile communication networks and computer networks. First, channel reliability issues and system configuration issues. The limited wireless bandwidth and harsh communication environment make various applications be built on an unreliable, possible disconnected physical connection. In the mobile computing network environment, the mobile terminal position of the mobile terminal position can be configured and updated in real time. Second, in order to truly perform various calculations in mobile, the broadband data business must be supported. Third, how to expand the existing mobile management technology of the phonetic business to the broadband data business. Fourth, how to transplant some mature technologies in a fixed computing network into a mobile computing network.
The new microcomputer and information terminal products for global network -based applications will become the main product. Portable computers, digital genes, mobile phones and terminal products, and various handheld personal information terminal products will integrate mobile computing and digital communication. The mobile phone will be embedded in high -performance chips and software, according to the standard unlimited communication protocols according to the standard unlimited communication protocol (Such as Bluetooth) online, watch TV, listen to radio. The new generation that grows up on the Internet naturally does not use cars as a mobility tool. The car will provide users with functions such as access to the Internet, office, and family entertainment to become an information platform on the wheels.
The threshold to enter the new century. Imagine the future, we might as well review people's understanding of computers this century. In 1943, THOMAS WASON said, "I think the computer demand in the world market is about five." In 1957, the US editor wrote "I have traveled to this country and talked to many best people. I can be sure that the data processing heat will not be hotter than this year." In 1968, IBM's high -end computer system engineer commented "But ... what is the use of?". Ken Olson, the founder and president of Digital Equipment Company in 1977, said, "No one has a reason to put a computer at home." May our words will also be proven to be superficial and conservative.
The water conservancy and hydropower engineering geological computer application technology collaboration network (hereinafter referred to as "collaborative network"), a "academic and technical exchange organization" and a series of effective work that she has carried out in recent years, has been affirmed by leaders at all levels and The recognition of the majority of engineering geological workers. As the collaborative network is about to formally establish and the third nationwide water conservancy and hydropower engineering geological computer application technology exchange meeting is about to be held, as the initiator and organizer of the collaborative network, the friends who care about us and all friends who care and love collaborative network systematically together It is very meaningful to devote a lot of passion, energy, and time to engineering geological computer applications. How to carry out work in the future, how to operate the collaborative network, where to do professional software, and how to apply computer technology to promote the development of engineering geological disciplines. And think about it. While actively exploring the positioning of the collaborative network, we are thinking about the tasks, purpose and goals of the collaborative network seriously. This article aims to clarify some of our views and discuss with everyone.
This development of computer technology is unexpected, and the glory of Internet is amazing. In history, there has never been a technology that has been different like computer technology. For thousands of years of history of human civilization, only today's Internet has profoundly changed the whole world. A new concept of information society, the concept of mutual assistance to obtain information and provides information at the same time, is both a competitor and a partner's industry idea. The spirit of innovation is unique to the computer industry and Internet, and it is also the essence of computer and Internet to change the world. We believe that the collaboration network is not simply a technical academic exchange organization. It is different from other academic groups. New interpretation is a new model combining computers and professional applications in information society.
1 In the past, the enlightenment of the past
Since the 1980s, various units in the water conservancy and hydropower system have successively established a computer room to carry out the computer application of the unit. To this day, some units's computer rooms have been dissolved one after another, and the head office has not retained the computer. What does this phenomenon explain? Is the past set of ideas and management methods that carry out computer application work that meet the characteristics of computer technology? Is it suitable for the development of computer application technology? where is the problem? What kind of reform should I do? These are all issues that are worthy of our serious discussion.
Over the years, our habits for computer application work are the management methods of science and technology projects, that is, investing in some funds and developing some professional software. This management method has its superiority in the early days of computer applications, but with the progress of the times, this management model is becoming more and more adapted to reality. The reason is that the core component of the "software" computer application is not understood. In other words, the bias of knowledge is generated. Software is like a person. To experience all stages of birth, growth, maturity, and death, it is called the life cycle of the software. In the entire life cycle of the software, including the system analysis phase, development phase, application and promotion phase, and maintenance and improvement stage. Among them, the first two stages only occupy a small part of the entire life cycle, and the latter two stages are a process of interaction, that is, the process of promoting each other. The disadvantages of our traditional way of work are mainly manifested in: first, only managing the software development phase, that is, only care about the birth of software and the growth of software, which causes some software to develop, and die due to development. Second, computer application work is independent of various professional places, causing serious disconnection of development and professional applications, let alone promotion and application. These are probably the fundamental reason for the slow development of professional software, and it is also the difficulty of computer application promotion.
The key to computer application work in each professional is to develop and use very targeted professional application software. This application software is different from other technology products, and many factors affect their development, including the attention of leaders, the financial resources of the unit, the choice of computer support software platforms, the quality of the user, and so on. Therefore, the content of computer applications is by no means just managing the software development phase, but also involves many social problems. It is a complex system engineering. It is necessary to investigate professional needs, track and manage the development process, but also carry out market promotion, promotion and services developed on the developed software, as well as formulating corresponding industry standards. Because the application of computer technology not only brings progress and development of professional technology, but also transforms and updates the concept. Therefore, to varying degrees, it will conflict with the current technology and management models and contradictions.
2 The origin of the collaborative network
The computer application work for engineering geological survey has not received the attention of the years over the years, and it is backward in the industry. This is a problem we have always paid attention to. In early 1995, we began to try to grasp the work by the professional office (as early as the power industry in the 1970s, and it was effective). We conducted a survey of the software development of the survey units of water conservancy and hydropower and the status of developers, analyzed and organized the information of the feedback, and conducted field inspections on several survey units. Through investigations and research, we feel that due to the small exchanges, the application software is mostly at low levels of repeated development, causing waste of personnel and funds to waste. Therefore, breaking the closure between each unit and establishing a good communication channel were the primary problems to be resolved at the time. At the academic conference of the National Water Conservancy and Hydropower Engineering Geological Information Network held in October 1995, we first proposed the initiative to set up a collaborative network. We hope to achieve mutual communication and promote computer application work through the organization form of the collaborative network. This initiative was affirmed by the participants, and everyone thought that the work was very necessary and very timely. Then in November of the same year, we held the second water conservancy and hydropower engineering geological computer application technology exchange meeting in Wuhan. The main software developers and users who participated in this meeting were mainly for the survey of software developers and users. Everyone fully discussed the significance of the cooperation network to the development of computer applications and professional application software in the industry, and unanimously supported the establishment of the collaborative network. At the beginning of 1996, the establishment of the collaborative network was formally established, and we started the preparations of our more than three years.
3 The management significance and actual effect of the collaborative network
The cooperation network operation actually has its unique management significance. What we call "management" has its own characteristics. It has both the connotation of industry management, and also includes the specific operation of the collaborative network. It is an attempt to break the old management model. The collaborative network does not have a ready -made management model to use. We only have to learn from the experience of others and continue to explore in practice. We collect advanced achievements of relevant computer applications in external systems, introduce it into the water conservancy and hydropower survey industry, and promote and exchange computer application experience in the industry to promote the progress of computer applications in the survey industry. One of our main tasks is to unite all netizens through the publishing of "Engineering Geological Computer Application" to achieve the purpose of exchanges and cooperation. The practice proves that the effect is good. The online journal is not only a place for netizens, but also a tool for our public opinion propaganda for computer application work. Drawing on the new concepts, new ideas and practices and explorations over the past few years, we have gradually formed the management ideas of computer applications in the industry, and have been recognized by everyone through exchanges with netizens.
Our main opinions include:
(1) The development of standard software and basic software, which is the foundation of software development. Only standard software and basic software that have a relatively high level of development and better application, maintenance, and expansion can enable professional computer application software to develop in an orderly and high -speed development. Essence
(2) Do not identify the software. The computer industry has long no longer carried out so -called software identification. Because of the development of software, there are inevitably some problems in your own, and a large number of application tests need to be carried out, and it is continuously corrected and improved. And the software in our industry starts late, and there are many places to be improved. If you do not conduct extensive exchanges and applies, users will discover problems and evaluate, and formal identification can only be talked on paper.
(3) Actively advocate exchanges and cooperation between units to develop, and vigorously advocate the product of the trend of free software in the era of free software. Today's computer community's respect for free software Linux shows that free software has special vitality in the computer industry. The spirit of free software will have an inestimable effect on the development of professional software.
(4) The collaborative network is a voluntary joint organization, and she reflects the spirit of an information society. The industrial society emphasizes competition, which eventually leads to division and closure; the information society emphasizes cooperation and mutual assistance, and emphasizes the team spirit. The rapid development of the Internet has accelerated the informationization process of society. Now, exchanges on the Internet are completely regardless of national boundaries and no regional restrictions. The Internet extends its own tentacles to every corner of the world, and online life is creating miracles every day. Seeking medical treatment, studying, asking for help, job hunting ... From this we see the desire of human mutual assistance to use the bridge of the Internet to be fully reflected, and the Internet has achieved things that people can't do in the past. The collaboration network is in line with the trend of this era and linked all the people who care about the development of professional software, including software developers, users, department leaders, university professors, and software developers. The enthusiasm of all parties has established a mutually beneficial cooperative relationship, giving full play to the advantages of all parties, and complementary mutual assistance. This is also the significance of management through the collaborative network.
(5) In the operating mechanism, the principle of voluntary access to the network is adopted without administrative means. Because there are no large amounts of funds as a backing, we must win the support of netizens by high -quality services and true and pragmatic spirit. The collaboration network is to connect all the people who care about professional software. Therefore, the netizen is not limited to the units and individuals of this system, which also reflects the opening awareness of the collaborative network.
(6) Establish an engineering geological computer application homepage on the Internet, making the exchange of information more free and fast, and software communication is more convenient and flexible. The homepage has attracted more computer application enthusiasts, expanded the scope of communication, and played a role in propaganda. Communication means to communicate with modern communication is the goal we are always pursuing.
The hard work of the collaborative network through the efforts of more than three years, the work of the collaborative network has been affirmed, and established the position of the geological world of the country, and won a good reputation for the water conservancy and hydropower industry. Whether it is the old predecessor in the engineering geological world, or the new generation of young geological workers, they have highly evaluated the significance of this work to the progress and development of professional disciplines.
In actual effects, the results of information exchange have also driven the development and application of professional software. Some units with good software development have vigorously promoted their software through the collaboration network and won more users, thereby driving the improvement and promotion of software; many backward investigation institutes in which computer applications have been behind Advanced experience has improved its own application level, and has tasted sweetness at work; some computer enthusiasts communicate experience, learn free software, learn from each other, and improve them together. The professors have also found the space to give play to their own strengths; it is worth mentioning that some of the articles introduced by some introduction software in the online journal solve the specific application problems of many units ... These fully show that the role of information is endless. This is not how much money used in the past plan system can not be done. And we seized the information of the information and truly changed the management mode of computer application work, so that the software made the software. The combination of development and application organically adapts to the development requirements of information technology.
. The other actual effect of the collaborative network is that she played a good role in publicity and encouragement. Her cohesion is manifested to organize the individual scattered in the past. Her thoughts of respect for talents, encouraging innovation, and advocating cooperation have greatly mobilized the enthusiasm of the technicians, and gave the talent's enthusiasm for the creative enthusiasm of talents. People gradually abandoned the consciousness of the past, began to realize the significance of cooperation, began to get out of the personal circle, conduct wider exchanges, and took out their years of results to share with everyone. The support, understanding and enthusiasm of netizens make us confident in the prospects of this work.
The work effect of the collaborative network shows us the deep -seated significance of modern management. This is also a major issue for the reform of our industry management department. Under the past plan system, the so -called management is mostly the management of people and property. In fact, there are only "management" but not "reasonable". Today, when the planning system is gradually weakened, the management department has gradually lost the right to control of human property, does it no longer need to conduct industry management? The answer should be negative! At any time, under any circumstances, management is essential for management. Only the management content and management methods are different. Management has always played a pivotal role in the development of things. In today's tide of reform, is we doing the tide of the times? Or is it eliminated by society? If we always hold the inherent old ideas, we must not be aggressive. At present, we are in the development period of the transformation of industrial society to the information society. New concepts and new technologies have emerged endlessly, bringing great impact to all aspects of society, and the role of information becomes more and more important. Information services will be a new era. One of the main contents of industry management. We must change our concepts to meet the challenges of the information society with a new attitude. The collaboration network will always adhere to the new concept, in the spirit of seeking truth and pragmatic, provide leaders with decision -making support, provide information services for the grassroots, and do our best.
4 The development prospects of the collaborative network
With the strong support of the leadership of the Water Resources Council and the Hydropower Council, the collaborative network will be officially established in October this year, which will greatly promote the work of the cooperation network. In the past three years, the collaboration network has played a role in communication information. With the formal establishment of the collaborative network, we hope to attract more computer application enthusiasts to join in. In the spirit of mutual assistance, dedication, and self -development, the collaboration network has always tried to create talents for every person who knows to create talents. Space; In addition to the promotion of promotion, the collaboration network must also go deep into the development of application software to accelerate the standardization process of professional software. In the future product. Enrich and improve the geological homepage of the project to welcome the arrival of netizens with updated and more attractive content. Accelerate the network of information exchanges in the industry. Here, we want to further emphasize that the collaboration network provides a big stage for each netizen to be free to gallop. You can try everything you want to do. Each idea can Published, you can publicize your software, express your opinions and suggestions on software, talk about your new ideas, new understanding, and new views, provide some useful information and experience, seek cooperation, ask your own urgent problem to solve the problem. … In short, let various information spread to every netizen with the ascensis of the Internet, so that netizens can carry out wider mutual assistance and exchanges.
of course, the realization of these beautiful wishes also depends on the joint efforts of all netizens and all friends who care about the collaborative network. We welcome more units and individuals to join the collaborative network. We also welcome computer software companies to bring us their advanced technology, let us work together to improve the level of computer application in the survey industry.
Analysis of the design and implementation of the current multimedia "Computer Application" CAI system
Abstract: This article introduces the design method of multimedia CAI systems on campus online for "Computer Application" courses. It clarifies the comprehensive processing method of computer information such as text, images, animation, video, and audio, which has certain practical significance for the current teaching reform.
The keywords: CAI; campus network; multimedia
1 Introduction
With the development of computer network technology and rapid popularization, the campus network is becoming more The more it shows its huge effect. How to use the campus network to serve teaching more effectively is a problem that every school that builds a campus network urgently needs to be solved. At the same time, with the deepening of education reform, the scale of school enrollment expansion, the shortage of popular professional teachers, and establishing a CAI system based on the campus network, it is completely necessary.
CAI, that is, computer -assisted teaching. It uses computers to organically combine text, graphics, images, animations, sounds, etc., and use specific structures between various media to establish logical connections to integrate an interactive information system. On the campus network, the network virtual classroom is established to produce CAI courseware to achieve the images of teachers' lectures and electronic lectures simultaneously. Students can repeatedly watch the teacher's lectures in different locations. It breaks through the time and space restrictions of traditional teaching. With its digitalization, multimedia, large information, and interactive characteristics, it provides a effective way for students to learn and review themselves.
"Computer Application" is a professional basic course. The technical secondary school and higher vocational colleges must conduct a provincial -level exam. A course. Its content involves a wide range, and it has more exercises on board. If you only use "saliva chalk" to teach, or only 10 % of the computer in the computer room, it is difficult to meet the requirements of the level. There are many students and fewer computer teachers, and it is bound to increase the burden on teachers. Then, the CAI courseware of making multimedia "Computer Application" is published on the campus online. This is a practical method for learning this homework and improving the computer's oversupply rate.
2 system characteristics
(1) Sharingability. This teaching software is developed on the multimedia teaching system of the campus network, and anyone can broadcast all online users.
(2) Interactivity. This teaching software has designed a good user interface, which is developed by multimedia interactive models to automatically demonstrate; it can also control the program to perform single steps; you can return to the previous step to execute or repeat the current steps. Therefore, the learning progress, learning content, and learning methods are freely selected by students. They can also communicate with teachers through the BBS forum set by online software and discuss with classmates.
(3 vividness. The system uses dynamic graphics and sound synchronous explanations, and the teacher's image and teacher's electronic lectures are placed simultaneously. Make full use of text, graphics, images, animations, sounds and other multimedia methods to make teaching activities vivid and interesting . Through the level of practice, exercises, testing, and over -level, students' enterprising spirit and curiosity is continuously stimulated.
(4) Openness. System design adheres to the principle of humanization. Users only need to operate the mouse to use the mouse to just operate the mouse to You can enter the chapters of multimedia courseware, and you can choose the knowledge points you need to learn. At the same time, the CAI courseware can continue to add new content, increase the question bank and knowledge points, etc. Software composition
The depth of general multimedia programs will not exceed three layers, otherwise it will not be conducive to program development or users browse and use. This software only establishes two layers of structure, and the first layer consists of four large units. A large unit is: basic chapters, exercises, testing articles, and over -level articles. The second layer consists of multiple small units. ; Over -level articles are selected according to the requirements of the school's requirements for various levels. The entire software structure is clear, which is convenient for students at various levels of learning.
The basic chapter is: Introduce the basic concepts, basic theories, and basic operations of this chapter. High vocational students and secondary vocational students can choose related content. . Whether it is secondary vocational textbooks or higher vocational textbooks, some experiments are arranged. Here are 20 experiments for students to use.
The test articles are: to answer each chapter question of the textbook, and build a dynamic test question bank. Let students test online self -test. Students can know their grasp of the content of each chapter.
The section of the section is: Since the education administrative departments of all provinces and cities have their own level requirements, according to the secondary vocational and higher vocational schools Different requirements are designed with various types of over -level examination simulation questions to test the students' own level.
4 Multimedia production
This software uses .0 as a multimedia software development platform, .0 It is the newly launched function of multimedia production software. It is the most popular open development platform in multimedia software development. Its main functions and characteristics include: process -based creative methods, providing direct maps, texts, and animations to direct direct maps, texts, and animations Creative processing capabilities, have a variety of interactive functions, have dynamic link functions, provide library and module functions, provide multi -platform and network support, etc. Using the provided SHOCKWAVE technology Go online. Therefore, it is widely used in the production of multimedia software.
4.1 Sound processing
The sound of the software is recorded for the sound of teachers' lectures. The recorder, After the microphone is entered, the sound of the sound is synthesized with the background MIDI music, and the background music played online is optional.
This playback uses VB multimedia control components MCI and API functions. When using MCI controls, the two advanced interface functions are required:
Declare functions Lib "MMSYSYSTEM" (Byval_command As String) As Integer
DECLARE FUNCTION LIB "MMSYSYSTEM" (byval mci_command as String, byval handle as integer as integer) as long
Just accept it.
Is when using the .0 multimedia software playback system for sound playback, the sound icon of the .0 sound icon did not support MIDI music playback. You can control the MIDI music playback through the MCISEND and functions to send the MIDI music.
4.2 Image production
It uses pictures of scanners and digital image mechanisms to correct, adjust, process, and convert image processing software through Photoshop, and other image processing software to obtain the required pictures.
In addition to the traditional processing method in image processing, this software also uses some techniques: 1) Determine the size of the picture according to the actual picture size of the picture. The best clarity; 2) use the bitmap method to capture the screen image image, first save the obtained image into the memory, and then take out the image data in the bitmap for processing; 3) the various types of teaching software in the teaching software There are many arrows and labels, and it is difficult to draw directly in the program. Therefore, the software is used to obtain pictures in the software, and then modified in the "brush".
4.3 Animation production
(1) Use 3DMAX to make .avi animation, and then use videdit to modify editing in Video for Windows.
(2) Directly record the teacher's lecture scene, and use screen image compression technology to convert it into MPEG files for playback. For the convenient video viewing of users, the system provides technologies such as suspension, starting/continuing, and playing positions.
(4) Use the Active X control to add the .gif painting to the toolbox, and then reference the animation in the program.
5 network application platform design
This software uses .0 to achieve super -text structure. Users can choose learning content and learning path according to their preferences to make the system adapt to students' learning
Xi Psychology. In order to make the written software published on the Internet, the designed software is packaged into a .app file format first. This file type constitutes a MIME file that can be published on the Internet.
This software uses the Internet/Server mode of the Internet to achieve user browsing. Client software completes the task through TCP/IP network protocols and server -side software communication. Due to the need to transmit audio streams, video streams, and screen image streams at the same time, these media must complete synchronization. We use RSTP as a control protocol, the transmission protocol uses TCP, and then uses the time in the stream as the parameter to finally complete the synchronous playback on the client.
6 End words
In on the campus network, use multimedia "Computer Application" teaching CAI system to present a learning scene of a picture, text, and sound. Interest and improve students' ability to receive, and use good learning methods to achieve a good learning effect. Not only can the "Computer Application" course develop the multimedia CAI system, but other courses can also be developed. Make full use of teaching resources and develop a large number of multimedia courseware. The current teaching reform will be a bright sun.
The reference
[1] Wang Jicheng, Zhao Jun, etc. PC Multimedia Application Guide Beijing: Tsinghua University Press. 1999
[2] Guo Qixiang, Wen Li, multimedia creative tutorial. Guangzhou: South China University of Technology Press, 1996
[3] Deng Ningfeng, Wang Wei, etc. 6.0 practical tutorial. Beijing: Beijing Hope Electronics Publishing House 2002
is for reference only, please learn from
00:00 / 00: 5970% shortcut keys to describe space: Play / pause ESC: Exit full screen ↑: increase volume 10% ↓: decreases by 10% →: Single fast forward 5 seconds studio Here you can drag no longer appear in the player settings to reopen the small window shortcut key description