The advantage of ATM technology for statistically multiplexing network resources by different users invokes the competition of network resources. This competition has some damaging effects on message transmitting.\;Th...The advantage of ATM technology for statistically multiplexing network resources by different users invokes the competition of network resources. This competition has some damaging effects on message transmitting.\;The research for testing methods and technology of ATM is important for us to develop ATM networks, to promote their construction, to ensure that various ATM devices provided by different providers interoperate properly and to provide excellent services for telecommunication users.\;After discussing the abstract testing method of conformance testing and the abstract description of protocol testing, the thesis puts forward a kind of abstract testing configuration for ATM testing and a kind of abstract description method for testing case.\;From the angle of application, the thesis discusses the basic rules for ATM testing. After that, the thesis points out that the ATM testing must be made from the four aspects of normal testing, conformance testing, performance testing and interoperability testing. The general testing methods, general configuration and connection for ATM testing and the selection of ATM testing items are discussed, respectively, in the four aspects.\;Combined with the characteristics of the traffics supported by ATM systems, the thesis discusses several kinds of traffic models for conducting ATM testing. On the basis of studying various traffic models, the author classifies traffic models for ATM testing as three kinds: periodic traffic models, stochastic traffic models and manual traffic models. The parameters of describing traffic models and their calculating method are discussed in the thesis. A new kind of periodic cell sequence traffic model is proposed in this thesis. The periodic cell sequence traffic model has excellent linearly descending characteristics in the cell interval. The traffic models discussed in this thesis can be applied to various ATM testing cases.\;From the point of normal testing, physical layer testing, ATM layer testing, AAL layer testing, network management testing and signaling testing, the thesis studies and normalizes actual ATM testing cases, testing methods and testing steps. Various kinds of testing cases and relative testing purposes, testing steps, testing configurations, testing connections and testing judging rules are also discussed and normalized in the paper.\;In the end, the selecting method of testing duration for bit error rate testing studied in the thesis according to the bit error rate criterion has been determined to the systems under testing. The judging method to determine bit error rate of the systems under testing is given with the results of bit error rate testing that has been conducted in the determined time duration in the past.展开更多
Tianiin Automotive Test Center has a test capability as well as a capability of conducting universality techniques research. With fixed assets of around RMB 76.44 million yuan and an architectural area of 11,200 sqm, ...Tianiin Automotive Test Center has a test capability as well as a capability of conducting universality techniques research. With fixed assets of around RMB 76.44 million yuan and an architectural area of 11,200 sqm, test labs mainly include: auto emission test lab, full-scale vehicle crash test lab, auto safety test lab, auto lighting and view field test lab, engine test lab,展开更多
As the great progress has appeared in the field of protection of new varieties of plants, the standardization of the DUS (Distinctness, Uniformity, Stability) test procedure has become more important. However, the s...As the great progress has appeared in the field of protection of new varieties of plants, the standardization of the DUS (Distinctness, Uniformity, Stability) test procedure has become more important. However, the specification of filming technique plays an important role in the DUS test of new varieties of plants. In this paper, we analyzed the status quo and significance of the application of filming technique in the PVP (Plant Variety Protection) system, and provided an introduction about the application of filming technique in DUS test in China.展开更多
Research Objective and Overview It is necessary to find effective Chinese materia medica (CMM) for the treatment of refractory hematopathy as commonly used prednisone, androgen and immune suppression agents of tende...Research Objective and Overview It is necessary to find effective Chinese materia medica (CMM) for the treatment of refractory hematopathy as commonly used prednisone, androgen and immune suppression agents of tendemonstrate poor efficacy and serious side effects.展开更多
Acoustic-pulse compression is obtained in systems with different timebandwidth products by applying the digital matched-filter technique to ultrasonic non-destructive testing. The signal is linearly frequency -modulat...Acoustic-pulse compression is obtained in systems with different timebandwidth products by applying the digital matched-filter technique to ultrasonic non-destructive testing. The signal is linearly frequency -modulated (LFM) pulse and the digitized electrical-excitation signal itself is used as a digital matched filter. Experimental results are in good agreement with theory. Suppressions of side lobes achieve -41.9 dB and -41.5 dB for the Hamming and Gaussian weighted signals respectively. It shows that the application of the digital matched-filter technique improves the performances of a ultrasonic testing system explicitly.展开更多
Life cycle cost technique is a powerful tool to make a scientific decision and a useful method of advancing the continuable development of the society. In this paper, development course, application actuality and up-t...Life cycle cost technique is a powerful tool to make a scientific decision and a useful method of advancing the continuable development of the society. In this paper, development course, application actuality and up-to-date research trends of life cycle cost technique in China are summarized. Some suggestions are given on how to general- ize the application of life cycle cost technique which are used as the reference to study life cycle cost technique.展开更多
文摘The advantage of ATM technology for statistically multiplexing network resources by different users invokes the competition of network resources. This competition has some damaging effects on message transmitting.\;The research for testing methods and technology of ATM is important for us to develop ATM networks, to promote their construction, to ensure that various ATM devices provided by different providers interoperate properly and to provide excellent services for telecommunication users.\;After discussing the abstract testing method of conformance testing and the abstract description of protocol testing, the thesis puts forward a kind of abstract testing configuration for ATM testing and a kind of abstract description method for testing case.\;From the angle of application, the thesis discusses the basic rules for ATM testing. After that, the thesis points out that the ATM testing must be made from the four aspects of normal testing, conformance testing, performance testing and interoperability testing. The general testing methods, general configuration and connection for ATM testing and the selection of ATM testing items are discussed, respectively, in the four aspects.\;Combined with the characteristics of the traffics supported by ATM systems, the thesis discusses several kinds of traffic models for conducting ATM testing. On the basis of studying various traffic models, the author classifies traffic models for ATM testing as three kinds: periodic traffic models, stochastic traffic models and manual traffic models. The parameters of describing traffic models and their calculating method are discussed in the thesis. A new kind of periodic cell sequence traffic model is proposed in this thesis. The periodic cell sequence traffic model has excellent linearly descending characteristics in the cell interval. The traffic models discussed in this thesis can be applied to various ATM testing cases.\;From the point of normal testing, physical layer testing, ATM layer testing, AAL layer testing, network management testing and signaling testing, the thesis studies and normalizes actual ATM testing cases, testing methods and testing steps. Various kinds of testing cases and relative testing purposes, testing steps, testing configurations, testing connections and testing judging rules are also discussed and normalized in the paper.\;In the end, the selecting method of testing duration for bit error rate testing studied in the thesis according to the bit error rate criterion has been determined to the systems under testing. The judging method to determine bit error rate of the systems under testing is given with the results of bit error rate testing that has been conducted in the determined time duration in the past.
文摘Tianiin Automotive Test Center has a test capability as well as a capability of conducting universality techniques research. With fixed assets of around RMB 76.44 million yuan and an architectural area of 11,200 sqm, test labs mainly include: auto emission test lab, full-scale vehicle crash test lab, auto safety test lab, auto lighting and view field test lab, engine test lab,
基金Supported by the Special Fund for Agro-scientific Research in the Public Interest(200903008-15)~~
文摘As the great progress has appeared in the field of protection of new varieties of plants, the standardization of the DUS (Distinctness, Uniformity, Stability) test procedure has become more important. However, the specification of filming technique plays an important role in the DUS test of new varieties of plants. In this paper, we analyzed the status quo and significance of the application of filming technique in the PVP (Plant Variety Protection) system, and provided an introduction about the application of filming technique in DUS test in China.
基金Supported by Australia-China Links Program sponsored by IDP Education Australia (NoⅡ-8)the National Natural Science Foundation of China (No 30070933)+1 种基金the Natural Science Foundation of Zhejiang Province as the key project (No DZ007)State Administration of TCM of China (No 972025)
文摘Research Objective and Overview It is necessary to find effective Chinese materia medica (CMM) for the treatment of refractory hematopathy as commonly used prednisone, androgen and immune suppression agents of tendemonstrate poor efficacy and serious side effects.
文摘Acoustic-pulse compression is obtained in systems with different timebandwidth products by applying the digital matched-filter technique to ultrasonic non-destructive testing. The signal is linearly frequency -modulated (LFM) pulse and the digitized electrical-excitation signal itself is used as a digital matched filter. Experimental results are in good agreement with theory. Suppressions of side lobes achieve -41.9 dB and -41.5 dB for the Hamming and Gaussian weighted signals respectively. It shows that the application of the digital matched-filter technique improves the performances of a ultrasonic testing system explicitly.
基金supported by the National Postdoctoral Science Foundation of P.R.China under Grant No.20080431380
文摘Life cycle cost technique is a powerful tool to make a scientific decision and a useful method of advancing the continuable development of the society. In this paper, development course, application actuality and up-to-date research trends of life cycle cost technique in China are summarized. Some suggestions are given on how to general- ize the application of life cycle cost technique which are used as the reference to study life cycle cost technique.