Cai's character story

1965 Professor Cai just joined the work when he met the "Cultural Revolution". She was not carried away by fanatical sports, but focused on improving her professional level and studying professional knowledge hard. During that time, Cai served as an electrician, TV principle, TV transmission, coaxial cable and other courses, and almost all the textbooks she used were written by herself. In addition, she also participated in the trial production of the "digital voltmeter" model in the instrument workshop of Beijing University of Posts and Telecommunications, the development of the first color TV ob van in China and the debugging and test of the encoder in Beijing TV Equipment Factory.

Cai's father is a famous expert in information theory and communication technology in China, vice president of Beijing Institute of Posts and Telecommunications and doctoral supervisor. Cai saw from her father and other scientists of the older generation that an important factor that kept them at the forefront of advanced technology was foreign languages. In the 1970s, under the example of parents, in that era when most people were keen on making their own furniture, the couple often took their children and reviewed English words while walking, thus learning English in a down-to-earth manner, laying a solid language foundation for going abroad for further study a few years later.

The Third Plenary Session of the Eleventh Central Committee kicked off the reform and opening up in China. China, which has been closed for decades, began to take the first step outward. 65438-0979 The Ministry of Education decided to send overseas students and visiting scholars to the west. This is an unprecedented opportunity for every scholar engaged in teaching and scientific research for decades. The Ministry of Education holds an open selection examination, and the opportunity is fair to everyone. Tens of thousands of people across the country signed up for the exam, and the first batch of people were admitted 1700, including Mr. and Mrs. Cai.

In America, couples in their late forties suddenly become students. The technology they mastered in China, such as transistors and analog circuits, has long been eliminated in the United States. The color TV technology they were familiar with was still high-tech in China at that time, but in the United States, the color TV technology was completely mature and did not belong to the teaching content of colleges and universities. As for digital signal processing, image processing, pattern recognition and other technologies, they only heard of these terms before going abroad. The contrast between culture and technology is daunting. In the United States, there are many scholars from other countries working in the same research group with them. They can discuss some academic issues with their tutors, but Mr. and Mrs. Cai can only be listeners at that time.

The only way to narrow the gap is to face up to reality and catch up. Seeing that they studied hard, the tutor suggested that they formally register for a degree. They also feel that this can make them have pressure to learn knowledge systematically. So I applied for China, and got strong support from the school, and approved their application, but I raised the tuition and living expenses by myself. 1982, Ms. Cai and Mrs. Cai both obtained master's degrees in electrical and computer engineering from the University of California, and returned to China happily as requested by the Embassy.

After they returned to China, they were invited by the then Radio and Television Bureau, hoping that they could write a book to improve their business, which was aimed at technicians and graduate students working in national television stations and research units. So they wrote the book "Video Processing of TV Cameras". First, they introduced the concepts of spatial frequency and Fourier optics into domestic TV books. Colleagues believe that this book is completely the condensation of the author's own thinking and understanding, which is very distinctive.

1985, the couple went to the United States for further study and sent them to study for a doctorate at their own expense. Their tutor is an internationally renowned expert in image technology, Professor Glenn Wade of the University of California. Professor Wade enjoys a high reputation in international academic circles and has long been the editor-in-chief of the world-famous magazine Journal of Institute of Electronic and Electrical Engineers. The prestige and profound knowledge of the tutor created a good learning environment for them.

Cai took nearly 20 courses abroad and laid a solid foundation. Under the guidance of her tutor, Cai participated in many scientific research projects. Cai's research results of "nonlinear acoustic parametric diffraction CT" were published in IEEE Trans. The results of "radar target modeling" were sent to the US Navy in the form of an internal report from the Department of Electrical Engineering, University of California. Cai and his wife also published more than 10 papers in foreign magazines and international conferences.

Cai studied computer communication abroad, which is a hot major. There is a great demand for talents in America. Many big companies go to schools for important people, and their tutors also take the initiative to recommend jobs for the Cai couple. If the two of them stay in the United States, they will certainly get a high salary and live a comfortable life. Almost all the international students who graduated from the United States at that time stayed abroad. The students advised them: "The opportunity is rare and they should stay in the United States." Whether to go or stay, the Cai couple fell into deep thinking: "Stay, life and treatment are not as good as home, but after all, they still work for others, and there is always a feeling of not being at home. Material prosperity will inevitably come at the expense of mental and interpersonal stress. In addition, at the time of China's reform and opening up, many foreign companies are looking for opportunities in China. As a China person, what are you hesitating about? " When they finally decided to return to China, many people didn't believe it, but Professor Wade, Professor Cai's mentor, understood Cai's feelings and said with admiration, "You are good citizens of China!" .

It is with the urgent desire of "serving the motherland" that they can't wait to attend the graduation ceremony and receive the doctoral degree certificate issued by the school after defending their doctoral thesis, so one person is left to do the finishing work, and the other person hurried back to China to plan the construction of the laboratory. After returning home, they brought back all the materials and painstaking efforts they had consulted for many years, totaling dozens of boxes. 199365438+In February, Cai went to the United States to cooperate with a company on a project and met her classmates who stayed in the United States after graduation. Under the eaves, they all miss home. Professor Cai is more convinced that he can do a good job in China, and his original choice was right.

While studying hard abroad, the Cai couple insisted on leaving a pair of young children at home. When they first went to America, the eldest son had just entered primary school and the youngest son was less than one year old. In order to study, they entrusted their eldest son to their grandmother's care and put their youngest son in the workers' home. When I went abroad for the second time, my youngest son was still in kindergarten. Don't they love their children? Of course not! The eldest son was sickly when he was a child. Teacher Sun often goes to the hospital the night before 10 to register his son. This shows his love for his son. After seven years abroad, I can imagine my worries. They write a long letter to their son every 3-4 weeks and send back their deep love for their children from the other side of the ocean. Cai pays attention to cultivating children's independent living ability and self-discipline ability. When they were abroad, their eldest son in primary school took milk the first thing after school every day, and the second thing was to pick up his younger brother from kindergarten. After the younger son went to primary school, the older son took on the task of tutoring his younger brother. I need my parents' signatures, help with dictation and other things, all of which are done by my brother. Back in China, everything has to start from scratch. Cai Xiangxue suggested the establishment of a laboratory of image communication and modern imaging technology, and started a hard pioneering course. When the laboratory was first established, there were no funds, no equipment and no students. Cai contacts everywhere, buys materials, strives for research funds, recruits graduate students, and even goes to the streets to buy soldering irons himself. After 10 years of painstaking efforts, Cai He and his wife have achieved fruitful results. The research laboratory led by them has become one of the few research laboratories with the largest scale and the most abundant funds in Beijing University of Posts and Telecommunications.

From 65438 to 0989, they undertook the research project of single photon emission ct with a total funding of 850,000 yuan. SPECT is a large-scale medical CT equipment with complex technology and great difficulty. At that time, only a few large foreign companies could produce it, and China spent a lot of foreign exchange to import it every year. They absorbed the advantages of several top products in the world, and completed the development of SPECT main processor in 1994, which made outstanding contributions to China's computerized tomography technology.

After returning to China for more than ten years, Professor Cai and Professor Sun have successively undertaken four national natural science foundation projects. Among them, the research of non-binary coded aperture γ -ray imaging technology is unanimously considered as "extremely difficult" by reviewers, reaching the level of "international advanced" or "international leading" in academic level; The research of automatic fingerprint identification technology has also won the "excellent" evaluation of the Natural Science Foundation.

In the early 1990s, multimedia technology appeared. They immediately devoted themselves to this new field, and in 1994, they undertook the national 863 high-tech communication project "Remote Multimedia Communication Terminal and System". Then began to study the integrated service multimedia communication system. This is a national "Ninth Five-Year Plan" large-scale research project supported by the Science, Technology and Industry Committee for National Defense, aiming at developing a set of multimedia integrated information service system for our army, including digital editing, compression, processing, multi-level storage, and real-time transmission and calling on HFC and IP networks. The phased achievements of the project participated in the 2000 exhibition of supporting scientific research achievements of military industry, which was well received by leaders at all levels who came to inspect. On the basis of the above-mentioned scientific research and extensive reference to foreign literature, they set up a postgraduate course of "Multimedia Communication Technology" at Beijing University of Posts and Telecommunications 1995. After five years of teaching practice, they jointly compiled and published the course textbook "Fundamentals of Multimedia Communication Technology" for 2 1 century, and won the first prize of Beijing Excellent Teaching Achievements.

Cai and his wife dare to challenge authority and innovate in scientific research. A paper by Professor R.Mittra, an internationally renowned optical expert, on the focusing characteristics of Fresnel zone has been widely cited as a classic document for more than 20 years. However, the two of them found that R.Mittra's conclusion was inaccurate and wrong in some places. After careful argumentation, they published the correct theoretical analysis and calculation results in the American Journal of Optics, and many professors and scholars from the United States, Britain, France, Germany and other countries wrote in succession and spoke highly of their papers. This paper was included in SPIE's landmark literature collection for half a century from 65438 to 0997.

In Professor Cai's decades of work, she always "regards work and survival as a kind of entertainment" and is busy. She regards work as the happiest thing in life, and she always maintains a positive and optimistic attitude even in the most bitter and tiring circumstances. This seemingly ordinary attitude towards life is full of profound wisdom, strong sense of responsibility and willpower, which fully embodies Professor Cai's great personality charm and spiritual strength.

In academic theory, Professor Cai is famous for his solid foundation, meticulous thinking and rigorous style. When she and Professor Sun Jingao are studying abroad, they often forget to have dinner together to discuss a professional problem. Years later, the two professors recalled the situation and were still laughing. When they were writing a paper for the American optical magazine Milestone Book, Professor Sun woke Professor Cai up in the middle of the night to discuss this problem, which really reached a sleepless night.

In scientific research, she has a keen insight, a strong sense of responsibility, and never-failing enthusiasm and energy. It is precisely because of this spirit of being ahead of science that Professor Cai has achieved great success. In the field of multimedia communication, Professor Cai has accumulated rich experience in participating in many scientific research projects such as National Natural Science Foundation of China, 863, Science, Technology and Industry Committee for National Defense, established and led the construction and research work of the ministerial key laboratory of multimedia communication and biometric identification, and mastered the transmission and service quality control of video and audio streams on IP networks, format conversion and rate conversion of video streams, real-time extraction and concurrency control of video and audio data on video servers, hierarchical storage and data migration of massive video and audio data, HFC networks and HFC networks.

Professor Cai has made great efforts in image recognition, automatic fingerprint recognition, face recognition, multimodal identity recognition and bullet mark recognition, and achieved fruitful results. Among them, the research results of automatic fingerprint identification technology are the most outstanding: Cai and his wife put forward a variety of advanced automatic fingerprint identification algorithms for different applications of public security criminal investigation and citizenship authentication. The algorithm still has a high recognition rate under the difficult conditions of elastic deformation, noise, blur and broken line in fingerprint images. Professor Cai's fingerprint identification of NSFC project was selected as the outstanding achievement of NSFC funded project (III); During the Ninth Five-Year Plan period, the system developed by the State Planning Commission was the first large-scale system in China that could actually operate with a population of 530,000. It passed the official appraisal of the Science and Technology Department of the Ministry of Public Security, and won the second prize of Beijing Science and Technology Progress in 2000. The system developed by Cai and his wife has advanced design and high cost performance. It is the first large-scale automatic fingerprint identification system in China that actually runs on a database of 500,000 people, and has been used in Chongqing, Tangshan and other places. In Chongqing alone, 230,000 people were built in one year, and 99 cases were solved directly.

"My life is limited, but my knowledge is also limited." Professor Cai always pays attention to the latest development in the field of technology, grasps the most advanced technology of image recognition, and tracks the technological development of various scientific research groups. In the process of guiding students, she can point out the shortcomings of some emerging technologies and guide students to think deeply and face objectively. Professor Cai really keeps pace with the times academically, which embodies the scientific spirit of independent thinking of scholars.

In addition to his busy teaching work, Professor Cai insists on writing. She and her laboratory have published more than 70 papers, 7 monographs and translations in domestic and international journals and international conferences such as IEEE Transactions, Journal of Optics, Journal of Electronics and Journal of Communication s. The paper "The Ancient Focusing Characteristics of Fresnel Zone Plates" published by her and Professor Sun Jingao in the American Journal of Optics 199 1 was selected by 1996 as the landmark "Selected Papers on Zone Plates of the International Association of Optical Engineering". Her English monograph "Technology and Application of Medical Imaging System" was published by American publishing house in cooperation with foreign professors and was well received by international peers. While keeping up with the trend of international technology development, she is engaged in the research of multimedia communication science. At the same time, she took the lead in setting up a postgraduate course of multimedia technology in Beijing University of Posts and Telecommunications 1995, and wrote the book "Fundamentals of Multimedia Communication Technology", a textbook for 2 1 century, which won the first prize of Beijing Excellent Teaching Achievements.

Professor Cai, who pursues the truth and never gives up, works at the forefront of scientific research with full enthusiasm. Her high sense of responsibility and strong sense of mission for the cause of the party and the people has made her still tireless. Professor Cai not only dedicated her personal wisdom, but also devoted herself to the interests of the people. As a famous professor, Professor Cai is well aware of the important role of teachers in talent training. Teachers' words and deeds have a subtle influence on students. She attaches great importance to teaching by example, and has been infecting teachers and students around her with the spirit of rigorous scholarship, earnest teaching, hard work and sincerity and selflessness. She is not only a good teacher in students' study, but also a good friend in life, and is deeply loved and praised by students. There is no lofty slogan, no passionate oath, only Professor Cai's plain words: "Teaching and educating people, responsibility first, lead students into promising fields, let them combine their own projects, give full play to their talents, gradually improve their personal knowledge system and cultivate their own abilities. This is the basic duty of the tutor. " In his teaching post, Professor Cai practices the life pursuit of an ordinary party member with the belief that "life is endless, the source of flowing water is endless, and things are moistened silently".

Professor Cai enrolls 6-8 master students and doctoral students every year. In the long-term education and training process, Professor Cai has always adhered to the principle of "being a teacher, being well-founded and well-founded" and educating students by his own words and deeds. She asked the students to "sit down because they are here to do research". When commenting on students' papers, she asked students not to publish them and not to copy others'. While asking students to strictly abide by academic ethics, she pays attention to cultivating students' pioneering and innovative spirit, and gives timely criticism, guidance and necessary supervision to students' lazy behavior. Teacher Cai organizes graduate students to hold study seminars every week, and the students have to go to the stage one by one to talk about the progress of the week. The students all reported their own study and research. If there is any problem, everyone will discuss with each other, inspire each other and help each other. There is no reservation between classmates. Teacher Cai has a solid theoretical foundation, covers a wide range, is proficient in software and hardware, has a keen mind, can quickly grasp the key points, and can immediately point out the problems existing in students' reports. His opinions are very enlightening. For doctoral students, Professor Cai will meet separately once a week to give guidance and coordination respectively. When the laboratory is busy, there are often two or three projects to be done at the same time, with a total of about 20 students. Assign the most suitable project according to everyone's foundation and specialty, and at the same time pay attention to the integrity and innovation of the project, so that students can get comprehensive exercise. In this way, Cai grasped and coordinated the whole research room as a whole, and finally gave a check in theory, which tapped everyone's energy and mobilized everyone's enthusiasm. Her graduate student, with strong scientific research ability, is very popular in society. 65438-0993, American Natural Science Foundation came to China to communicate with its counterparts in China. They visited the scientific research achievements of many universities in China in image technology. Finally, the group came to Beijing University of Posts and Telecommunications. The students in Cai's research room introduced several of their projects in English. Foreign experts gave thumbs up happily and said that among the units they visited in China, "the last one was the best!"

"The research room has developed to this day, and I can sit at home and write books at night without going to the streets to buy soldering irons." Cai said: "Scientific research should be far-sighted and spare no effort, so as to produce results. When I see the achievements of scientific research and the growth of students, I will feel a kind of joy after work, and this joy is my constant self-improvement and inexhaustible motivation. "

Every semester, Professor Cai will teach cutting-edge knowledge to undergraduates and multimedia communication courses to graduate students. Based on the tenet of "let students master as much knowledge as possible in the limited teaching time", she prepares lessons carefully and absorbs the latest research results and industry trends in time. Her class is simple and thorough, and is warmly welcomed by students. In teaching, she pays great attention to combining the teaching of basic knowledge with the introduction of the latest technological development, so that the course content is constantly updated and synchronized with the development of the subject. The students were surprised to find that Cai had read the relevant information about the latest professional technology in detail when communicating with Cai. Teacher Cai has many students and different directions. Some of her students are engaged in hardware research and some are engaged in fingerprint research. However, Professor Cai is methodical under her guidance. She carefully pointed out the best path of research for students in different directions, pointed out the latest technological achievements and pointed out the maze. Teacher Cai works in the research room for three units every day all the year round to solve students' problems at any time. She used to work in the research room on Saturday and Sunday, but later found that it would give students invisible pressure, and students were embarrassed to rest on weekends, so they went home to study.

Professor Cai is famous for his rigorous scholarship. When correcting students' papers, she corrected them word for word in terms of words, grammar and structure. She even pointed out the addition or deletion of an experimental data and even revised the introduction. Sometimes an article has to be revised three times. When the paper came back, the quality of the article was greatly improved. After this repetition, students learn how to write academic papers and express their ideas from their tutors. In this regard, the students said emotionally: "It is not easy for Teacher Cai to persist in doing it for decades. Teachers' attention to students is our pride and a kind of supervision. She is very strict with us and likes it very much. "There are more examples of Professor Cai than words. In July 2004, she had an operation due to illness. At the end of August, she asked her classmate's email address to recommend reading materials for English papers to her classmates. She resumed attending the group meeting in September. The students were greatly moved: "Teacher Cai is very strong. After the death of Teacher Sun, she tried to restrain her feelings. "Although she never teaches, Her Majesty the Queen makes us respect her more."

Professor Cai's "love" for students is not only reflected in his "exquisite art", but also in his meticulous care for every student's daily life. Some students have to travel frequently because of this project. Teacher Cai makes long-distance calls every night to ask if there are any technical difficulties, and more importantly, he cares about their life away from home. For girls, Teacher Cai is even more worried, saying, "You must pay attention to safety and protect yourself"; Students take part in the international competition of fingerprint identification. Teacher Cai is as meticulous as her mother. She sends them delicious fruits and snacks every day, which deeply touches the busy and tired students. Sometimes at the end of the evening meeting, when the students come back from dinner, they can always find that Teacher Cai is still tutoring the students. Then she suddenly realized, "Ah, it's past seven?" Then she asked the students who had been talking to her, "Do you have a place to eat?" . Not only that, the things that students make friends and fall in love are often hung in Teacher Cai's mind. She often teaches her doctoral students, "since she has chosen a lifetime of research work, she should not be afraid of poverty, but endure loneliness;" When looking for a girlfriend, you should also get her understanding and support. "

Over the years, Professor Cai has been strict with himself according to party member standards, consciously keeping in line with the CPC Central Committee, actively publicizing the principles and policies of the party and the state with practical actions, and enthusiastically devoted himself to the torrent of teaching reform in colleges and universities. She kept in mind the Party's purpose of serving the people wholeheartedly, earnestly performed party member's duties, conscientiously implemented the requirements of Theory of Three Represents Thought, and persisted in influencing and educating teachers and students around her with her words and deeds in her work and life. During the critical period of his wife Professor Sun, Professor Cai, who suffered great psychological trauma, always considered minimizing the impact on others and insisted on not disturbing leaders, colleagues and students. Although Professor Cai is in poor health, she has always devoted herself to her work with amazing perseverance, persistent enthusiasm and vigorous energy, and worked conscientiously in the front line of teaching and scientific research. Until Professor Sun's funeral, many students learned the bad news and were moved by Professor Cai's selfless spirit. Some students said with tears, "We will never forget this."

During those painful days, she always stuck to the front line of teaching and scientific research, earnestly completed the teaching work, counseled graduate students and doctoral students in scientific research projects and wrote academic papers. During Mr. Sun's hospitalization for more than half a year, except for special circumstances, Mr. Cai rushed to the hospital at 6: 00 a.m., rushed back to school at 2 1 p.m. and worked in the laboratory from 22: 00 to 23: 00, never delaying the group meeting. Nevertheless, Professor Cai has repeatedly revised the graduation thesis of three master students and two doctoral students word by word, and has repeatedly scrutinized and carefully corrected the punctuation and typos in the thesis. In order not to let personal feelings affect his work, Professor Cai tried to control his emotions and hide his inner pain. Even after her operation, she insisted on attending every regular meeting. Although she was too weak to speak, she tried her best to guide the students and never let go of any minor problems. After leaving the hospital, Mr. Cai insisted on working and went to the laboratory to read professional materials every day to guide students in detail; After class, she often takes students back to the laboratory to explain and answer questions.

Cai and his wife live a simple life. In order to save cooking time, instant noodles and quick-frozen dumplings have been their staple foods for many years. Shopping and the like have little to do with them. In an appraisal, Mr. Cai's husband, Mr. Sun, discovered before being interviewed by CCTV that the trousers he was wearing had cracked and there was no second one at home, so he had to buy one before the nearby store closed, accompanied by his colleagues.

Teacher Cai, who is devoted to academic research, is very indifferent to material life. She dresses simply and eats simply. She loves her major and devotes herself to her work. In the laboratory, she is always from morning till night; She has a bad stomach. When she is busy at work, she often uses quick-frozen jiaozi or instant noodles to satisfy her hunger. Over the years, students have replaced desks and computers in batches, and her computer is always the oldest. The student said with emotion: "Teacher Cai's cultivation as a human being has reached a certain level, and she has completely abandoned fame and fortune, which is no longer within her consideration."

As a member of the CPPCC, Professor Cai actively participated in the discussion of state affairs and won many outstanding proposal awards. For decades, she has truly reflected her love for the motherland in her persistent pursuit of her career and dedication to her work. Despite her busy work, she never forgets that she is a teacher in party member Middle School, and always puts loyalty to the Party's education and training qualified personnel with ideals, morality, culture and discipline in the first place.

Philosopher Zhu said when explaining the word "dedication": "Nothing is right for the Lord, only respect", which means that anyone who does something must be loyal to it and must concentrate all his energy on it. This is simply respect. Confucius also said: "He is also a human being, who forgets to eat when he is angry, and forgets to worry when he is happy. He doesn't know that his old age is coming. " Digging deep into the root of Professor Cai's dedication, dedication is responsibility, pleasure is fun, the only secret is loyalty, and loyalty from the heart is respect.

Most people say that "people over 30 don't learn art", but in the face of the needs of China's modernization, she really overcame the difficulties in the new subject of multimedia transmission system without hesitation, which fully reflected the innovative spirit and professionalism of keeping pace with the times. For more than forty years, Professor Cai forgot to eat and sleep, and worked day and night, which really reached the realm of selflessness. During her many years of scientific research career, she has always embodied the excellent quality of a party member scientific and technological worker, and is a model for faithfully practicing the "Theory of Three Represents" theory. Professor Cai has a strong sense of responsibility and mission. She takes teaching and educating people as her responsibility, is willing to contribute, is willing to be poor, stays away from worldly impetuousness, and makes students "believe in their teachers and their ways". She really cares about every student and inspires students with the advanced nature and noble morality of the producer.

Over the years, Professor Cai has done a lot of work in the field of multimedia communication and pattern recognition for the construction and development of Beijing University of Posts and Telecommunications, adhering to the spirit of "respecting morality and carrying things with dedication". Now, she is continuing her efforts to build Beijing University of Posts and Telecommunications into a world-class university at an early date.

In Professor Cai's view, it is enough to do a practical thing that is beneficial to the country and society for a lifetime. In the past few decades, Professor Cai has always adhered to such a creed: "You can do a kind of work with your own talents and environment and make it perfect." That's what she said and did. Professor Cai set a model of putting work first and others first for teachers and students with the advanced nature of * * producing party member, and wrote her loyalty and love for the party's education with the virtue of * * producing party member. The advanced nature of party member, the producer of * * *, and the lofty demeanor and indomitable strong character of the producer embodied in Professor Cai deeply touched all the teachers and students of Beijing University of Posts and Telecommunications; Her spirit of selfless dedication, serving the people wholeheartedly and persistent pursuit of career inspire and spur all the teachers and students of Beijing University of Posts and Telecommunications.