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高速网络业务尾分布的参数估计

天津大学学报（自然科学与工程技术版） 2003年第4期36卷 414-417页

作者：薄今纲刘嘉焜任力罗晓光天津大学管理学院天津300072 天津大学理学院刘徽应用数学中心天津300072 南京邮电学院通信工程系南京210003

在高速网络控制与带宽分配研究中,网络业务尾分布分析是一个重要问题.利用大偏差理论对网络分数自回归整合滑动平均(FARIMA)业务队列尾分布进行分析,得出队列尾分布渐近服从Weibull分布.给出了一个基于Markov过程平稳分布的参数估计方法... 详细信息

在高速网络控制与带宽分配研究中,网络业务尾分布分析是一个重要问题.利用大偏差理论对网络分数自回归整合滑动平均(FARIMA)业务队列尾分布进行分析,得出队列尾分布渐近服从Weibull分布.给出了一个基于Markov过程平稳分布的参数估计方法.最后对Bell实验室实测数据进行了实证分析.

关键词：网络业务尾分布参数估计拥塞控制带宽分配分数自回归整合滑动平均 Weibull分布 Markov过程

维普期刊数据库

Modulation characteristic of vertical-cavity surface-emitting lasers subject to external optical feedback

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Modulation characteristic of vertical-cavity surface-emittin...

第十届全国青年通信学术会议

作者： Xiaofeng Li, Wei Pan, Dong Ma, Bin Luo (school of Information science & technology, Southwest Jiaotong university, Chengdu, Sichuan 610031, china)

＜正＞The small-signal modulation characteristics of vertical-cavity surface-emitting lasers （VCSELs） subject to both weak and strong external optical feedback are studied numerically. For weak feedback case, the oscillation amplitude of the laser output, the modulation bandwidth and the frequency chirp are affected simultaneously by the light reflected by the external mirror. The variation directions of them are determined by the relative phase of the reflected optical field and the in-cavity one, which is ultimately decided by the external cavity length. For strong feedback case, however, the laser behaviors might be influenced dramatically. When the optical feedback dominates the modulation effects, rich nonlinear dynamics, such as the periodic, multi-periodic, quasi-periodic, and chaotic oscillations, are excited. When both effects are equivalent, however, the nonlinear dynamics induced by the optical feedback as well as the periodic envelope introduced by the current modulation is simultaneously found in the laser output.

关键词： VCSELs current modulation external optical feedback chaos.

服务台数可变的 GI/G/n 排队系统的性能分析

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清华大学学报（自然科学版） 1998年第6期38卷 12-15页

作者：黄红选冯允成清华大学应用数学系北京航空航天大学管理学院

从离散事件系统的一条仿真样本路径出发，同时估计系统的性能以及系统参数改变时性能的变化量，是提高仿真效率的有效途径。对ＧＩ／Ｇ／ｎ排队系统，提出了一种估计服务台数ｎ对系统性能影响的新方法，在估计系统中顾客期望等待时间的... 详细信息

从离散事件系统的一条仿真样本路径出发，同时估计系统的性能以及系统参数改变时性能的变化量，是提高仿真效率的有效途径。对ＧＩ／Ｇ／ｎ排队系统，提出了一种估计服务台数ｎ对系统性能影响的新方法，在估计系统中顾客期望等待时间的同时，估计服务台数ｎ变为ｎ＋１时期望等待时间的变化量，从而可以间接地获得ＧＩ／Ｇ／ｎ＋１系统中顾客期望等待时间的估计值。数值实验表明，新方法在性能分析方面的效果良好。

关键词：排队系统摄动分析样本路径服务台数

维普期刊数据库

Adaptive output feedback control of uncertain nonlinear systems:A convex optimization approach

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Adaptive output feedback control of uncertain nonlinear syst...

2010 Chinese Control and Decision Conference

作者： Wei Guan~1,Hong-Jun Ma~2 1.school of Automation,Shenyang Institute of Aeronautical Engineering,Shenyang 110136,china 2.school of Information science and Engineering,Northeastern university,Shenyang,110004,china

＜正＞This paper studies the problem of global stabilization by output feedback for a family of uncertain nonlinear systems without zero *** nonlinear systems are dominated by a triangular system satisfying polynomial growth in the unmeasurable *** novelty of this paper is that a universal-type adaptive output feedback controller is numerically constructed by using a sum of squares（SOS） optimization algorithm,which can globally regulate all the states of the uncertain systems without knowing the growth *** example is presented to show the effectiveness of this methodology.

关键词： Nonlinear systems output feedback universal adaptive control sum of squares

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流浪儿童的社会支持因素分析

市场与人口分析 2004年第2期10卷 19-22页

作者：陈国华许传新成都理工大学地球科学学院四川成都610059 成都理工大学文法学院四川成都610059

建立流浪儿童社会支持体系 ,帮助这部分儿童重新回归家庭、回归社会 ,完成正常的社会化过程 ,是中国社会工作的一项重要内容。立足我国国情和现实情况 ,分析了流浪儿童的政府、社会群体以及个体三个重要支持系统的功用。

关键词：流浪儿童社会支持体系中国国家支持系统群体支持系统个人支持系统

维普期刊数据库

A Single Amino Acid Change(Asp 53→Ala53) Converts Survivin from anti-apoptotic to proapoptotic

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A Single Amino Acid Change(Asp 53→Ala53) Converts Survivin ...

中国细胞生物学学会第八届会员代表大会暨学术大会

作者： Zhiyin Song, Shixin Liu, He He, Yi Wang, Shanshan Feng and Mian Wu Department of Molecular and Cell Biology, Key Laboratory of Structural Biology, school of Life sciences, university of science and technology of china, hefei, Anhui, PR china 230027

Survivin is a member of the inhibitor of apoptosis protein (IAP) family that has been implicated in both apoptosis inhibition and cell cycle control. Recently, growing attentions have been attracted due to its tumor-specific expression and potential applications in tumor therapy. However, its inhibitory mechanism and subcellular localization remain controversial. Here, we report a novel Survivin mutant Surv-D53A, which displays opposing function and distinctive subcellular distribution compared with its wild type counterpart. Surv-D53A was shown to induce apoptosis in a p53-independent fashion, indicating that tumor suppressor p53 is not involved in its apoptosis pathway. Surv-D53A was shown to markedly sensitize apoptosis induced by TRAIL, doxorubicin and RIP3. We also demonstrated that Surv-D53A localizes in cytoplasm in interphase and to midbody at telophase similar to wild-type Survivin, however, it fails to co-localize with Aurora B to centromere in metaphase as wt-Survivin. Surv-D53A mutant is less stable than wt-Survivin and is degraded by ubiquitin-proteasome pathway more rapidly. Additionally, we found that Surv-D53A could interact with wt-Survivin to form heterodimer, which may account for the loss of anti-apoptotic function of wt-Survivin. Finally, unlike wt-Survivin, Surv-D53A is unable to bind to Smac/DIABLO, which may explain the underlying mechanism for its abolishment of anti-apoptotic activity of Survivin.

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Characteristics of indoor and outdoor black carbon aerosol during winter and summer in rural area of Guanzhong Plain

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Characteristics of indoor and outdoor black carbon aerosol d...

第十届全国气溶胶会议暨第六届海峡两岸气溶胶技术研讨会

作者： Zhu Chongshu1,2 Cao Junji1,Shen Zhen Xing3,Liu Sui Xin1,2(1.State Key Lab of Loess & Quaternary Geology,Institute of Earth Environment,Chinese Academy of sciences,Xi’an,Shanxi 710075,china 2.graduate school of the Chinese Academy of sciences,Beijing 100039,china 3.Department of Environmental science and Engineering,Xi’an Jiaotong university,Xi’an,china.)

Black Carbon（BC） were measured continuously in rural area of Guanzhong Plain during winter and *** concentrations of BC varied acutely over a range of 3.9-25.6 μg m-3 for outdoor and 4.8-24.7 μg m-3 for indoor in daily mean concentration,with the overall average values of 14.6 μg m-3 and 14.4 μg m-3 for outdoor and indoor in winter,*** mean BC concentrations varied over a range of 2.9-9.9μg m-3 for outdoor and 4.7-10.2μg m-3 for indoor,with the overall average value of 6.0 μg m-3 and 7.2 μg m-3 for outdoor and indoor,respectively in *** results shows the concentrations of black carbon is high in the rural area,especially in winter,which is probably due to the local biomass burning for warming and *** rural area of Guanzhong Plain,Obviously diurnal variation of BC was observed,with the hourly average concentrations ascending to its peaks twice a day in the morning and at the *** frequency distributions of BC concentrations in both indoor and outdoor environments showed a similar *** indoor environment,it was found that the BC concentrations were distributed over the high spectrum of concentrations than that for outdoor *** relationships between indoor and outdoor concentrations（separately for LT,WN and HX sites） of BC were discussed,which showed a good correlation between indoor and outdoor air of the three *** results suggest that indoor black carbon was derived at least in part from outdoor air.

关键词： Black carbon rural area Guanzhong Plain

The Film-forming Properties and Morphology of Structure Renforced Soy Protein Isolate Film

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The Film-forming Properties and Morphology of Structure Renf...

第十四届国际谷物科技与面包大会暨国际油料与油脂发展论坛

作者： Jiang Jiang~(1 2) Xiong Youling~1 Liu Yuanfa~2 Wang Xingguo~2 Department of Animal and Food sciences university of Kentucky1 Lexington KY USA school of Food science and technology Jiangnan university2 Wuxi Jiangsu china

＜正＞The use of soy proteins as a film-forming agent could add value to *** soy proteins can produce flexible,clear edible films with excellent oxygen and lipid barrier properties,films made from native soy proteins are rather brittle,and has poor water vapor permeability（WVP）.Usually, Film-forming solutions entails heat treatment to unfold proteins,leading to hydrophobic group exposure and native disulfide bond cleavage,and consequently form new disulfide,hydrophobic,and hydrogen force during *** pH shifting treatment have very similar protein unfolding principle to heating process with less hydrophobic *** our previous investigation of extreme pH-shifting treatments to expand the functionality of soy protein isolate（SPI） via the molten globule state, we noted weakened tertiary and quaternary structures and markedly enhanced surface hydrophobicity and increase protein ***,the objectives of this research were:（1） To determine the effect of pH shifting combined heat processing on the formation of non-covalent and disulfide bond in films.（2） To investigate relationship between film properties and different *** present study was undertaken to determine the effect of pH-shifting on film-forming properties of SPI at different temperatures and the physicochemical and microstructural characteristics of resulting *** exposure（1 h） of SPI at extreme acid or alkaline pH to unfold,followed by refolding,was performed to alter the protein ***-plasticized films were prepared from pH-treated SPI solutions unheated or preheated at 50,60,70,or 80℃（30 min）.Tensile strength（TS）,elongation（E）, water vapor permeability（WVP）,color,protein solubility（pH 3～7）,and non-participating proteins （electrophoresis） of films were *** of films were viewed with light and electron *** alkaline pH-treated SPI spontaneously formed a transparent,slightly yellowish film at 20℃,which had the gr

关键词： soy protein isolate film pH shifting

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约束p-中位问题的适应值曲面分析

山西大学学报(自然科学版) 2005年第2期28卷 138-141页

作者：陈晔李有梅山西大学计算机与信息技术学院绍兴文理学院计算机系山西太原030006 浙江绍兴312000

适应值曲面分析法是研究问题结构及其搜索空间特征的有效方法.文章借助测度指标对约束p-中位问题(CPMP)的适应值曲面进行分析,并设计了合理的投影方法,将适应值曲面投影在三维空间中,以便于直观地研究曲面的结构特征.通过对适应值曲面... 详细信息

适应值曲面分析法是研究问题结构及其搜索空间特征的有效方法.文章借助测度指标对约束p-中位问题(CPMP)的适应值曲面进行分析,并设计了合理的投影方法,将适应值曲面投影在三维空间中,以便于直观地研究曲面的结构特征.通过对适应值曲面的研究,得到了CPMP的结构特征,理解了其难优化本质,进而指导算法设计,以更好地求解该类问题.

关键词：约束p-中位问题适应值曲面