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2006北京地区高校研究生学术交流会

作者： Sun Jinping,Guo Yinjing,Wang Qian,Sun Bo,Wang Xiuzhen,Jing Gang (college of Information and Electrical engineering, Shandong university of science and technology, Qingdao 266510, china )

SIP is an application-layer control protocol that can establish, modify, and terminate multimedia sessions. Because the bearer layer of VoIP is IP network, with VoIP deployment we will meet the private network based on NAT due to public IP address resource shortage. How to deliver VoIP services to the users behind NAT must be solved currently, so VoIP shall have the traversal ability of private network. To extend the SIP protocol stack, using the SIP ALG technology, the VoIP terminals in the private network realize to traverse the NAT without any additional devices to communicate with the other VoIP terminals.

关键词： SIP NAT ALG

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Observation of Ultrastructure of Polysaccharides from Chinese Jujube with Contact Mode Atomic Force Microscope in the Air

Observation of Ultrastructure of Polysaccharides from Chines...

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第五届全国化学生物学学术会议

作者： Jie Zhu~(1*) Lian-hong Guo~1 Bai-gang Zhang~2 Guo-dong Wang~1 1 college of science,Northwest A&F university,Yangling 712100 china 2 college of Life science and engineering,Lanzhou university of technology,Lanzhou,730050,china

＜正＞As the defoliating arbor,the jujube tree is the peculiar economic varieties of *** jujube’s edible history in china has over 3,000 years,and there were plenty of gardens along the Yellow River valleys even in Zhou *** the ‘king’ of fruits,the jujube fruit（commonly called as the Red Date）is sweet,delicious and nutritious,can be used as food or medicine which

关键词： Jujube Polysaccharides Atomic Force Microscope Ultrafine Structure

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OpenGL环境下利用MATLAB函数实现三维地形建模

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计算机工程与应用 2003年第34期39卷 127-128,154页

作者：张丽虹北京科技大学信息工程学院北京100083

高速铁路运行工况三维可视化研究是高速铁路建设的一个重要课题,而建立真实反映地形地貌的三维实体模型是此课题研究的基础。论文从实际工程背景出发,提出了地形建模的“顶点后处理法”,即通过MATLAB语言与C/C++语言的接口,利用MATLAB... 详细信息

高速铁路运行工况三维可视化研究是高速铁路建设的一个重要课题,而建立真实反映地形地貌的三维实体模型是此课题研究的基础。论文从实际工程背景出发,提出了地形建模的“顶点后处理法”,即通过MATLAB语言与C/C++语言的接口,利用MATLAB强大的数据处理功能,对地形表面数据点进行特定处理以后,再用OpenGL函数命令,建立三维地形模型。通过实例分析证明,此方法简单、方便、有效。

关键词：三维地形建模顶点后处理法 MATLAB接口方法

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维普期刊数据库

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Flexible Membrane-type Fruit Tree Simple Facility with Windproof and Waterproof

Flexible Membrane-type Fruit Tree Simple Facility with Windp...

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2011 International Conference on New technology of Agricultural engineering(ICAE 2011)

作者： Wang Jiaofei college of engineering Shan xi Agricultural university Taigu china Wang Shuangxi college of engineering Shan xi Agricultural university Taigu china

With the purpose of increasing the modern agricultural establishment domain,this article proposes one new-style fruit tree protection simple facility with rigid and the flexible *** facility can realize automatic aeration through the simple air interchanger on the roof,and this facility is wind-proof and rain-proof,easy to build,durable and recycled and has non-construction pollution,efficient ventilation system.

关键词： movable type vinylhouse simple air interchanger Manufacture method

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Response of Antioxidase in Body Fluid and Tissues of Sea Urchin Hemicentrotus pulcherrimus to Water-accommodated Fraction of No.0 Diesel Oil

Response of Antioxidase in Body Fluid and Tissues of Sea Urc...

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The 12th Asian Pacific Confederation of Chemical engineering Congress

作者： D.Q.Xiong~a F.R.Lv~(a,b) a college of Environmental science and engineering of Dalian Maritime university,Dalian,china b college of Environmental and Chemical engineering of Dalian university,Dalian,china

In order to searching for oil pollution biomarkers in marine benthic ecosystem,the toxicologi- cal effect of water-accommodated fractious(WAFs)in No.0 diesel oil on sea urchin Hemicentrotus pulcherrimus was examined using the methods of eco-toxicology and *** of su- peroxide dismutase(SOD),catalase(CAT),and gtutathione-s-transferase(GST)to the WAFs in body fluid and viscera tissues such as gonad and digestive gland were *** experimented

关键词： No. 0 diesel oil Hemicentrotus pulcherrimus SOD CAT GST

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Effect of Selenization Temperature on The Properties of CuInSe2 Films Prepared by Selenization of Metallic Cu-In Alloy Precursors

Effect of Selenization Temperature on The Properties of CuIn...

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第十五届国际光伏科学与工程大会

作者： Fangdan Jiang~1, Jiayou Feng~2 1 Department of materials science and engineering, Tsinghua university, Beijing 100084, P.R.china 2 Corresponding Author, Department of materials science and engineering, Tsinghua university, Beijing 100084, P.R.china

In this study, CuInSe films were prepared by selenization of metallic Cu-In alloy precursors, which were deposited on Mo film coated sodalime glass substrates by dc-magnetron sputtering. The effect of selenization temperature on properties of CulnSe films was investigated. The as-deposited Cu-In alloy precursors were consisted of mainly CuIn and elemental In phases. The crystalline structure of selenized CuInSe films at various selenization temperatures was examined by XRD analysis, and it appeared that single phase CuInSe films with random orientation and chalcopyrite structure were prepared in the selenization temperature range of 400-500℃. Furthermore, the reaction pathway of selenization process is demonstrated.

关键词： magnetron sputtering selenization precursor band gap

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A Hybrid Adaptive Wavelet Neural Network Control and Sliding Mode Control for Electro-hydraulic Servo System

A Hybrid Adaptive Wavelet Neural Network Control and Sliding...

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第二十九届中国控制会议

作者： WANG Hongyan 1,QIAO Jihong 2,WANG Qinglin 3 1.Department of Information engineering,Academy of Armored Force engineering,Beijing 100072,P.R.china2.college of Information engineering,Beijing technology and Business university,Beijing 100081,P.R.china3.Department of Automatic Control,School of Information science and technology,Beijing Institute of technology,Beijing 100081,P.R.china

In order to enhance the performance of electro-hydraulic servo system including nonlinearities,parameter uncertainties and load disturbance,a hybrid control scheme,integrating wavelet neural network controller（WNNC）and sliding mode controller is *** is the main controller that is used to mimic the equivalent control,and a sliding mode controller is designed to compensate for the difference between the equivalent control and the *** online adaptive laws are proposed to guarantee the tracking error is asymptotical stability in the Lyapunov stability theorem and Barbalat’s *** addition,in order to relax the requirement of approximation error bound,an estimation law is derived to estimate the error ***,the theoretical results are illustrated in the design of a controller for an electro-hydraulic servo system compared to the sliding mode controller;computer simulations show the superiority of the proposed design method.

关键词： Wavelet Neural Network Sliding Mode Control Adaptive Control Electro-hydraulic Servo System

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A Bayesian Framework for Target Tracking in Sensor Networks

A Bayesian Framework for Target Tracking in Sensor Networks

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第二十六届中国控制会议

作者： Cheng Yuanguo 1,2,Li Guohui 2 1.Electrical engineering college,Navy engineering university,Wuhan 430033,P.R.china 2.Computer college,Huazhong university of science and technology,Wuhan 430047,P.R.china

The work described in this paper presents a framework to track a moving target in sensor *** framework employs a method based on Bayesian classification to calculate the detection probabilities and proposes a tracking algorithm by defining the moving scope of a target,where the sensors have the higher values of detection *** re-sults show this scheme is effective.

关键词： Sensor Networks Target Tracking Bayesian Classification

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Synthesis and study on activity of phosphorus-containing derivatives of quinolinone targeting at HIV-1 integrase

Synthesis and study on activity of phosphorus-containing der...

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中国化学会第28届学术年会

作者： Yan Song,Zhang Sulei,Hu Liming* college of Life science and Bio-engineering,Beijing university of technology,Pingleyuan Street NO.100,Chaoyang District,Beijing,100124,china

＜正＞Integrase（integrase,IN）,as an ideal target for the design of HIV drug[1-3],is a hot spot in the field of anti-HIV drug research. However,at present there’s only one, Raltegravir,which has been successfully listed as an integrase *** is exciting and auspicious that Gilead sciences developed the first quinolinone acid-containing compound,Elvitegravir（GS-9137,JTK-303）,which has entered phase III[4].The quinolinone acid group of Elvitegravir has pharmacodynamic effects with HIV

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A NEW UEP SCHEME FOR ROBUST VIDEO TRANSMISSION IN LDPC CODED MIMO-OFDM SYSTEM

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Journal of Electronics(china) 2007年第3期24卷 396-401页

作者： Ru Congchong Zheng Haifeng Yin Liuguo Lu Jianhua Chen Changwen Department of Electronic engineering Tsinghua University Beijing 100084 China college of Information technology Fuzhou University Fuzhou 350002 China Dept. Electrical ＆ Computer Eng. Florida Institute of Technology Melbourne FL 32040 USA

In order to improve the video transmission performance in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing （MIMO-OFDM） system, a new scheme, which integrates Multiple Description Coding （MDC）, Low Density Parity Check （LDPC） coding and hybrid space time coding, is proposed in this letter. In particular, a hybrid space time coding algorithm is combined with LDPC codes to perform Unequal Error Protection （UEP） of MDC encoded video streams. Comparing with the UEP transmission with only LDPC codes, the proposed scheme achieves more than ldB gain in terms of Signal to Noise Ratio （SNR） when the Peak Signal to Noise Ratio （PSNR） of reconstructed video is above 30dB.

关键词： Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) Multiple Description Coding (MDC) Low Density Parity Check (LDPC) Unequal Error Protection (UEP)

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