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Fireball/Blastwave Model and Soft γ-Ray Repeaters

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Chinese Physics Letters 1998年第10期15卷 775-777页

作者： huang yong-feng DAI Zi-gao LU Tan Department of Astronomy Nanjing UniversityNanjing 210093

Softγ-ray repeaters are at determined distances and their positions are known *** observed,afterglows from their softγ-ray bursts will provide important clues to the study of the so called“classicalγ-ray bursts”.On applying the popular fireball/blastwave model of classicalγ-ray bursts to softγ-ray repeaters,it is found that their x-ray and optical afterglows are *** of the three repeaters is solicited.

关键词： bursts wave observed

Afterglows from Jetted Gamma-Ray-Burst Remnant:Does the Light Curve Break?

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Chinese Physics Letters 2000年第10期17卷 778-780页

作者： huang yong-feng DAI Zi-Gao LU Tan Department of Astronomy Nanjing UniversityNanjing 210093 Astronomical and Astrophysical Center of East China Nanjing UniversityNanjing 210093 Laboratory of Cosmic-Ray and High-Energy Astrophysics Institute for High-Energy PhysicsChinese Academy of SciencesBeijing 100039

Afterglows from jetted gamma-ray bursts are generally believed to be characterized by an obvious break in the light curve at the relativistic *** show that it is not the ***,an obvious break does exist at the transition from the relativistic phase to the non-relativistic *** this break itself is parameter dependent,afterglows from jetted remnant are uniformly characterized by a quick decay during the non-relativistic phase.

关键词： phase. relativistic break

Overall Evolution of Realistic Gamma-Ray Burst Remnant and Its Afterglow

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Chinese Physics Letters 1999年第10期16卷 775-777页

作者： huang yong-feng DAI Zi-gao LU Tan Department of Astronomy Nanjing UniversityNanjing 210093 Laboratory of Cosmic Ray and High Energy Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100039

Conventional dynamic model of gamma-ray burst remnants is found to be incorrect for adiabatic blastwaves during the non-relativistic phase.A new model is derived,which is shown to be correct for both radiative and adiabatic blastwaves during both ultra-relativistic and non-relativistic *** model also takes the evolution of the radiative efficiency into *** importance of the transition from the ultra-relativistic phase to the non-relativistic phase is stressed.

关键词： phase. relativistic radiative

Design and Application of Simulation for Controllable Pitch Propeller Hydraulic Servo System 36

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Design and Application of Simulation for Controllable Pitch ...

Induction of systemic lupus erythematosus syndrome in BALB/c mice by immunization with active chromatin

第36届中国控制会议

作者： Zhang Hui Sun Jian-bo Li Ying huang yong-feng Academy of Marine Engineering Dalian Maritime University Academy of Information Science and Technology Dalian Maritime University

ISBN: (纸本)9781538629185

In order to solve the problems that hydraulic servo system of the controllable pitch propeller is limited by the environment in actual trainings and high maintenance costs,on the basis of process simulation support platform,a hydraulic servo software simulation system of the controllable pitch propeller will be ***,mathematical models of hydraulic system pipe network,pump valve,hydraulic cylinder,cooler,and the propeller pitch actuator will be established;secondly,the simulation of the system logic control interface will be realized by VC++ programming technique;finally,the software simulation system will be provided with the whole operating functions of hydraulic system of the controllable pitch propeller and simulate the malfunctions in real ship to make assessments *** could simulate the malfunctions in real ship system and be useful in the education and training of mariners.

关键词： Controllable-pitch propeller Mathematical model Intelligent evaluation Simulation teaching

来源： cnki会议评论

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Acta Pharmacologica Sinica 2004年第6期25卷 105-109页

作者： Hong LI, Yun-yi ZHANG, Ya-nan SUN, Xi-yi huang, yong-feng JIA, Duan LI2 Department of Pharmacology, Schoolof Pharmacy, Fudan University, Shanghai 200032, China Department of Pharmacology School of Pharmacy Fudan University Shanghai 200032 China

AIM: To establish an animal model for systemic lupus erythematosus (SLE)-like syndrome in mice. METHODS: BALB/c mice were immunized with active chromatin isolated from ConA-actived syngeneic spleno-lymphocytes. Plasma samples of mice were tested by enzyme-linked immunosorbent assays (ELISA) for the presence of IgG anti-dsDNA, -ssDNA, and anti-histone antibodies. Tumor necrosis factor-α (TNF-α) in serum was measured by ELISA. Spleno-lymphocyte proliferation assays and the levels of interferon-γ (IFN-γ) in supernatants were tested respectively. Proteinuria was measured. Kidneys were examined by direct immunohistochemical method and light microscopy. RESULTS: Anti-ds DNA, ssDNA, and histone antibodies were induced in active chromatin-immu- nized mice, the proliferation response of splenocytes to ConA and LPS were reduced, levels of interferon-γ in supernatants and TNF-α in serum were lowered. Lupus nephritis was assessed by the presence of Ig deposits, glomerular pathology and proteinuria. CONCLUSION: The active chromatin-induced SLE-like mouse model was similar to idiopathic SLE in human.

关键词： systemic lupus erythematosus chromatin autoantibody tumor necrosis factor interferon type II B-lymphocytes T-lymphocytes female enzyme-linked immunosorbent assay

Implementation of ITU-T G.729 Speech Codec in IP Telephony Gateway

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Wuhan University Journal of Natural Sciences 2000年第2期5卷 159-163页

作者： huang yong feng,ZHANG Jiang ling National Storage System Lab, School of Computer, Huazhong University of Science & Technology, Wuhan 430074,China Huazhong University of Science & Technology National Storage System Lab School of Computer Wuhan China (GRID:grid.33199.31) (ISNI:***)

ITU-T G. 729 is the primarily recommended speech codec by H. 323 standard. This paper describes how to implement G. 729 codec in IP telephony gateway, and goes deep into the programming skills on TMS320C6201 DSP and optimizing methods of program code to reduce the speech processing delay time of G. 729 codec. Due to adopting these optimizing methods and programming skills, we have implemented a high-speed speech codec that can process concurrently 20 voice channels with single TMS320C6201 chip in IP telephony gateway. Finally, the paper analyzes the performance results of ITU-T G. 729 codec based on TMS320C6201.

关键词： Key words ITU T G. 729 IP telephony gateway speech codec

Identification of proteins that interact with murine cytomegalovirus early protein Ml12-113 in brain

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Chinese Medical Journal 2011年第21期124卷 3532-3536页

作者： WANG Hui LIU Xing-lou SHU Sai-nan huang yong-jian FANG feng Department of Pediatrics Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China

Background Murine cytomegalovirus （MCMV） early protein Ml12-113 is involved in viral DNA replication and believed to play a crucial role in the viral pathogenesis. To investigate the biological function of Ml12-113 protein in the pathogenesis of the brain disorders caused by cytomegalovirus （CMV）, a screening for proteins interacting with Ml12-113 was performed by a yeast two-hybrid system. Methods Bait plasmid pGBKT7-M112-113 was constructed and transformed into AH109 yeast. After confirmation of the expression of MCMV Ml12-113 in yeast, the bait yeast was mated with a prey yeast containing mouse brain cDNA library plasmid to screen the proteins interacting with M 112-113. Interactions between Ml12-113 and the obtained proteins were verified by yeast two-hybrid assay and chemiluminescent co-immunoprecipitaion. Results Two proteins interacting with M112-113 were identified, including metastasis-associated 1 （MTA1） and zinc finger, CCHC domain containing 18 （ZCCHC18）. Ml12-113 protein could interact with MTAt or ZCCHC18 in yeast and mammalian cells. Conclusion The interactions of Ml12-113 with MTA1 or ZCCHC18 may be related to the pathogenesis of MCMV-associated disease in central nervous system.

关键词： cytomegalovirus brain Ml12-113 yeast two-hybrid protein-protein interaction

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基于经验值的分层PMTU探测算法

电子学报 2007年第10期35卷 1865-1869页

作者：黄永峰张珂清华大学电子工程系网络研究所北京100084

IPv6协议规定路由器不再对IP分组进行分段,因此端到端的PMTU探测成为IPv6应用中的关键环节,研究高性能的PMTU探测算法是当前下一代互联网领域中的研究热点.论文针对目前分层探测算法存在等概率探测点带来的发送探测包较多的问题,提出了... 详细信息

IPv6协议规定路由器不再对IP分组进行分段,因此端到端的PMTU探测成为IPv6应用中的关键环节,研究高性能的PMTU探测算法是当前下一代互联网领域中的研究热点.论文针对目前分层探测算法存在等概率探测点带来的发送探测包较多的问题,提出了一种基于经验值的分层探测算法,并从探测精度、总花费时间和总发包数等方面分析了该算法的测试性能,在CERNET2环境下,对比测试了一些常见PMTU算法的性能.实验结果表明,该算法的测试精度、测试耗时和发送探测分组数等性能方面都优于其他探测算法.

关键词： PMTU IPv6 互联网

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流媒体隐蔽通信系统模型及性能优化

西安电子科技大学学报 2008年第3期35卷 554-558页

作者：肖博黄永峰清华大学电子工程系北京100084

针对流媒体载体类型的多样性造成隐藏过程的不一致等问题,提出了一种流媒体隐蔽通信系统的3层模型,该模型将流媒体的隐蔽通信过程划分为适配与执行、传输管理和隐蔽应用3个层次,定义了各层的功能、服务和接口原语等规则.针对隐蔽通信系... 详细信息

针对流媒体载体类型的多样性造成隐藏过程的不一致等问题,提出了一种流媒体隐蔽通信系统的3层模型,该模型将流媒体的隐蔽通信过程划分为适配与执行、传输管理和隐蔽应用3个层次,定义了各层的功能、服务和接口原语等规则.针对隐蔽通信系统中的主要参数建立了数学模型,得到了隐蔽信道有效利用率的表达式,利用求偏导数方法计算出给定条件下系统参数的最佳值.该模型已经在VoIP隐蔽通信系统中得到实现.实验和测试表明:分层模型很好地解决了不同载体下流媒体隐蔽通信隐藏过程的一致性问题,模型的理论计算值对实际系统的优化设计具有直接指导意义.

关键词：流媒体信息隐藏分层模型性能优化