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National Data of Class A, B, and C Communicable Diseases in December 2.13 in china

Biomedical and Environmental Sciences 2014年第1期27卷 74-75页

作者： center for Public Health Surveillance Information Service china CDC center for Public Health Surveillance Information Service china CDC

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Separation of Hydrophobic Neutral Compounds by Microemulsion Electrokinetic Chromatography

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Chinese Chemical Letters 1998年第11期9卷 0-0页

作者： Xiao Yun FU Xiu Zhu XU Jian De LU (Analytical and Testing center, Zhejiang university, Hangzhou 31002.) Zhejiang Univ Analyt & Testing Ctr Hangzhou 310027 Peoples R China

Microemulsion electrokinetic chromatography (MEEKC) was developed for the separation of hydrophobic neutral compounds. The effects of core phase and co-surfactant on the separations were investigated. Under the selected condition, good resolutions were obtained for the test mixtures. The separation efficiencies were higher than 105 theoretical plates per metre.

关键词： Microemulsion electrokinetic chromatography hydrophobic compounds

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Finite-Time Consensus of Multi-Agent Systems with Directed and Intermittent Links

Finite-Time Consensus of Multi-Agent Systems with Directed a...

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第三十届中国控制会议

作者： XIAO Feng~1,WANG Long~2.CHEN Tongwen~1 1.Department of Electrical and Computer Engineering,university of Alberta,Edmonton,Alberta T6G 2.4,Canada 2.Intelligent Control Laboratory,center for Systems and Control,College of Engineering,Peking university,Beijing 100871,P.R.china

＜正＞This paper considers the finite-time consensus problem in multi-agent systems with unidirectional and intermittent *** interaction topology is indeed directed and *** propose a simple but effective distributed nonlinear protocol in the form of a continuous state feedback and show that if the union of the interaction topology over a period of time contains a spanning tree periodically,then all agents will reach an agreement on states asymptotically;and if the sum of time intervals,over which the interaction topology contains a spanning tree,is sufficiently large,then all agents will reach an agreement on states in a finite time.

关键词： Multi-agent Systems Finite-time Consensus Directed Topologies Switching Topologies

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基于纹理特征的H.2.4/AVC顽健视频水印算法

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通信学报 2012年第3期33卷 82-89页

作者：张维纬张茹刘建毅钮心忻杨义先北京邮电大学信息安全中心北京100876 北京邮电大学灾备技术国家工程实验室北京100876 信息网络安全公安部重点实验室(公安部第三研究所) 上海201204

在分析现有视频水印算法的基础上,结合H.2.4压缩编码标准的特性,提出了一种新的基于纹理特征的视频顽健水印算法。算法先对当前帧4×4块进行整数离散余弦变换,判断其是否是纹理块,再采用能量差的方式自适应选择系数嵌入水印。实验结果表... 详细信息

在分析现有视频水印算法的基础上,结合H.2.4压缩编码标准的特性,提出了一种新的基于纹理特征的视频顽健水印算法。算法先对当前帧4×4块进行整数离散余弦变换,判断其是否是纹理块,再采用能量差的方式自适应选择系数嵌入水印。实验结果表明,该算法对视频质量和码率的影响较小,并且能有效抵抗高斯噪声、低通滤波、重编码等常见的视频水印攻击。

关键词：视频顽健水印能量差 H.2.4/AVC 纹理特征

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A Hybrid OCDMA Scheme with Variable Rate and QoS

A Hybrid OCDMA Scheme with Variable Rate and QoS

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2.03 International Conference on Communication Technology

作者： Pu Tao Li Yu Quan Xu Ming Yang Shu Wen Institute of Comm Eng PLA Univ of Scie&Tech nanjing P.R.china Advanced Tech Research {2. ShenZhen university Shenzhen P.R.china

We proposed a hybrid OCDMA system, in which users are divided into 3 categories: Frequency-Hop (FH), Time-Spread(TS) and FH-TS Codes’ users. Their address codes’ mathematical expression and codes’ car

关键词： OCDMA Algebraic Congruent Operator

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Direct Screening of a-Glucosidase Inhibitor from Natural Plant Extracts by Immobilized Enzymes Affinity Chromatography Fishing Combined with UPLC-Q-TOF-MS analysis

Direct Screening of a-Glucosidase Inhibitor from Natural Pla...

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中药与天然药高峰论坛暨第十二届全国中药和天然药物学术研讨会

作者： Shiren Deng~(1,2.,Hongbin Xiao~(1,*) 1.National Chromatographic R&A center,Dalian Institute of Chemical Physics,the Chinese Academy of Sciences,Dalian 11602.,china. 2.College of Pharmacy,Liaoning {2. of Traditional Chinese Medicine,Dalian 116600,china

A novel enzyme inhibitor screening method was established by a combination of immobilization of a-glucosidase(AGH)on agarose beads and ultra performance liquid chromatography- quadrapole time-of-flight mass spectrometry(UPLC-Q-TOF-MS)for fishing and identification of active components directly from natural plant *** AGH was first immobilized by reaction with the activated agarose and then incubated with the natural plant extracts for ligand *** components,(-)-epigallocatechin-3-gallate(EGCG),(-)-gallocatechin -3-gallate(GCG)and(-)-epicatechin-3-gallate(ECG),in the extract of leaves of Camellia sinensis (green tea)were fished out by their specific affinity binding between the ligands and the enzyme protein and then identified by ***,the above three components isolated from the green tea extracts were tested by traditional enzyme inhibition assay,the results showed each of these compounds was a potentα-glucosidase inhibitors(IC<5μM).This work demonstrates that this new immobilized enzyme-UPLC-MS method may provide an alternative for rapid,effective and direct screening enzyme inhibitors from natural plant extracts.

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NUMERICAL STUDY OF THE INFLUENCE OF SURFACE ROUGHNESS OF CYLINDER ON FLOW STRUCTURE

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Journal of Hydrodynamics 2000年第4期12卷 1-7页

作者： Gao Li jin, Zhou Lian di [WT5BX]china Ship Scientific Research center, Wuxi 2.4082. P.R.china (Received Jan. 14, 2.00) china Ship Sci. Res. Cent. Wuxi 214082 China

In this paper, the influence of surface roughness on flow structure was numerically studied. An adaptive numerical method, the fast vortex method was employed. A mathematical roughness, which comes from the no slip condition of vortex method, was introduced. The numerical results indicate that the roughness has appreciable influence on the flow structure. The vortex shedding could be controlled if the forward multi layer boundary condition is exerted.

关键词： mathematical roughness fast multipole method (FMM) forward multi layer boundary condition back multi layer boundary conditiont

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维普期刊数据库

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The Path Planning of Virtual Endoscopy Based on Image Segmentation

The Path Planning of Virtual Endoscopy Based on Image Segmen...

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第二十六届中国控制会议

作者： Gao Xiangjun1,Tian Lianfang1,Wang Lifei2.Mao Zongyuan1 1.College of Automation Science & Engineering,South china university of Technology,Guangzhou 510640,P.R.{2. 2.Image center,Clifford hospital,Guangzhou university of Traditional Chinese Medicine Guangzhou 511495,P.R.{2.

Path planning is a prerequisite task to automatically navigate with virtual camera and plays a crucial role in virtual endoscopy(VE)*** path planning algorithm based on segmentation combines the center-line path with the im-age segmentation by using the result of image segmentation to reduce the complexity of path *** algorithm makes use of the connectivity-preserving features of sequence images and segments a series of images by applying the adaptive re-gion growing *** stores the seed of growing region into a series of stack as the key point of the navigation *** there are maybe some cavities after 2. segmentation,we propose a 3D region growing *** key point of navigation path is selected during segmentation,and the navigation path is obtained after smoothing those ***-ment results show that our algorithm is feasible and robust.

关键词： Path Planning Virtual Endoscopy Adaptive Region Growing Threshold Segmentation

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Expression and Bioinformatics analysis of SPACA4 in Human and Mice

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Journal of Reproduction and Contraception 2008年第1期19卷 9-15页

作者： Ai-fa TANG Zhen-dong YU Yao-ting GUI Xin GUO Xian-xin LI Wei-xiang LIU Hui ZHU Zhi-ming CAI Shenzhen Key Lab of Male Reproduction and Genetics Shenzhen Hospital of Peking University Shenzhen 518036 China Research center of Biomedical Engineering Life Science Division Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China

Objective To analyze the expression of SPACA4 in human and mice. Methods Testes cRNA samples from Balb/c mice of different postnatal days were performed with mouse affymetrix chip to screen the expression of SPACA4 in mice. Sub-quantitative RT-PCR and bioinformatic tools were used here to describe the expression profile of SPACA4 in mice and human. Results The results of gene chip analysis indicated that the expression of mSPACA4 began after d 35 of postnatal testis in mice. Sub-quantitative RT-PCR assay showed that SPACA4 gene expressed exclusively in mouse and human testis, and mouse mSPACA4 gene expressed after d 35 of postnatal testis that was consistency with the results of gene chip analysis. By bioinformatics analysis, mSPACA4 is located in cell membrane （34.8%） or plasma membrane （34.8%）, the signal peptide cleavage site between position 19 and 2. amino acids, transmembrane region between 2.2. and 101-12. amino acids, respectively, on mSPACA4 protein. Conclusion mSPACA4 and hSPACA4 were testis-specific genes, and the expression of mSPACA4 begins after d 35 of postnatal testis in mice. SPACA4 is a candidate for targeting in a sperm-based contraceptive vaccine.

关键词： gene chips SPACA4 gene spermatogenesis male contraceptive vaccine

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行驶时间和服务时间随机的集配货一体的分批配送车辆路径优化

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控制与决策 2018年第4期33卷 657-670页

作者：石建力张锦西南交通大学交通运输与物流学院成都610031 西南交通大学综合交通运输智能化国家地方联合工程实验室成都610031

将铁路物流中心集配货路径问题抽象为行驶时间和服务时间随机的集送货一体的分批配送车辆路径问题进行优化.根据问题特点建立带修正的随机规划模型,对迭代局部搜索算法进行改进,设计允许分批配送的初始解构造算法、局部搜索算法和扰动机... 详细信息

将铁路物流中心集配货路径问题抽象为行驶时间和服务时间随机的集送货一体的分批配送车辆路径问题进行优化.根据问题特点建立带修正的随机规划模型,对迭代局部搜索算法进行改进,设计允许分批配送的初始解构造算法、局部搜索算法和扰动机制.算例测试证实:分批配送在中等规模和大规模算例中能发挥较好的作用,大部分中等规模和大规模算例都比不允许分批配送时所得到的解更优,部分中等规模和大规模算例车辆数有所减少;配送点数随着算例规模的扩大而增加,但是配送点数占顾客点数的比例却逐步降低;随机因素随机性增加将导致目标函数增大,对分批配送点数的影响不大.

关键词：行驶时间和服务时间随机分批配送车辆路径问题改进的迭代局部搜索

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