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第七届全国暨华人有机分子和聚合物发光与光电特性学术会议

作者： Dejia Chen Zhicai He Yangjun Xia Junfeng Tong Yuanyuan Gao Huijuan Li Yong Cao Hongbin Wu Duowang Fan College of Chemical and Biological Engineering of Lanzhou Jiaotong University Gansu Province Lanzhou 730070 China Key Laboratory of Optoelectronic Technology and Intelligent Control of Education Ministry Lanzhou diaotong University Gansu Province Lanzhou 730070 China College of Chemical and Biological Engineering of Lanzhou Jiaotong University Gansu Province Lanzhou 730070 China Institute of Polymer Optoelectronic Materials and Devices Key Laboratory of Special Functional Materials and Advanced Manufacturing Technology South China University of Technology Guangzhou 510640 China Key Laboratory of Optoelectronic Technology and Intelligent Control of Education Ministry Lanzhou diaotong University Gansu Province Lanzhou 730070 China

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Strategy research of integration and invocation based on the heterogeneous subsystems of ITS

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Journal of Beijing Institute of technology (English Edition) 2011年第SUPPL.1期20卷 178-184页

作者： Cao, Jie Shen, Chao Zhao, Hong School of Computer and Communication Lanzhou University of Technology Lanzhou 730050 China Manufacturing Engineering Technology Research Center of Gansu Lanzhou 730050 China Key Laboratory of Gansu Advanced Control for Industrial Processes Lanzhou 730050 China

Poor performance of cooperation work among heterogeneous subsystems of ITS has been a challenge in the past years, since resources cannot be completely shared and the efficiency of data transmission is low. To address this challenge, a scheme is proposed that utilizes Web service technology to redevelop the original ITS. Each subsystem is divided into function modules and then these function modules are encapsulated as services. The encapsulated services allow for the cooperative invocation and data exchange between subsystems. A universal description, discovery, and integration (UDDI) center is built to describe, register, release and invocate the services. In the UDDI center, an information model is constructed to analyze the returned XML information from services. As a result, a seamless Web integration solution is established eliminating the heterogeneity among subsystems, and thus the loose coupling of subsystems, resource sharing, and the synchronous data exchange can be achieved in ITS. © Copyright.

关键词： Web services

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Use of nitrogen gas in high-speed milling of Ti-6Al-4V

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中国有色金属学会会刊：英文版 2009年第3期19卷 530-534页

作者：柯映林董辉跃刘刚章明 Zhejiang Provinvicial Key Laboratory of Advanced Manufacturing Technology Zhejiang University State Key Laboratory of Fluid Powder Transmission and Control Zhejiang University

To inhibit chips burning in the high-speed cutting of Ti-6Al-4V, nitrogen gas with 0.7 MPa pressure was ejected at the milling zone. The high speed flowing of nitrogen gas speeds up the chips leaving, and prevents the chips from burning at the same time. By this method the cutting force is reduced. Especially, the temperature increment of the finished surface is smaller than 5 ℃. This prevents the increase of hardness, improves the roughness of the finished surface, and reduces the tools wear. Comparing and analyzing the morphology and color of chips, which are obtained from the high-speed machining of Ti-6Al-4V with and without nitrogen gas ejection, show the action mechanism of nitrogen gas during the high-speed machining of titanium alloy, and it is concluded that nitrogen gas can be used to realize the proper high-speed milling of Ti-6Al-4V titanium alloy.

关键词：高速铣削钛合金氮气 Ti 高速加工高速切削高速流动芯片

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measurement of localized deformation of shape memory alloy under fast tensile loading

Measurement of localized deformation of shape memory alloy u...

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International Conference on Experimental Mechanics 2008, ICEM 2008

作者： Feng, Ping Sun, Qing-Ping Yu, Tong-Xi Shenzhen Key Laboratory of Advanced Mould Manufacturing Technology College of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China Department of Mechanical Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong

The deformation of NiTi shape memory alloy strips and microtubes subjected to uniaxial tensile loading involves formation and growth of high-strain martensite domain(s) of various shapes due to autocatalytic stress-induced phase transformation. Under fast tensile loading with strain rates of 10 -3∼100/s, the number of the domains will increase with the strain rate and the domain morphology becomes very complicated. measurement of this kind of highly inhomogeneous and localized deformation is a challenging problem. This paper reports the results of our recent experimental advances in solving such problem. It includes: (1) the determination of domain front by direct characterization method, block tracking method, and speckle tracking method;(2) non-contact measurement of global and local strains by flexible video extensometer method. The above methods used in the measurements have been proved to be reliable and suitable for the localized deformation under fast tensile loading conditions. © 2009 SPIE.

关键词： Strain rate

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Sensitive and specific liquid chromatography-tandem mass spectrometry method for assay of fluoxetine and its metabolite norfluoxetine in human plasma and application of method to pharmacokinetic analysis

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Journal of Analytical Chemistry 2009年第9期64卷 941-950页

作者： Zhu, Hailin Luo, Jinwen Zheng, Guogang Shentu, Jianzhong Department of Chemistry Zhejiang Sci-Tech University Hangzhou 310018 China Key Laboratory of Advanced Textile Materials and Manufacturing Technology Zhejiang Sci-Tech University Hangzhou 310018 China Zhejiang Provincial Institute for Drug Control Hangzhou 310004 China First Affiliated Hospital College of Medicine Zhejiang University Hangzhou 310003 China

A simple, specific and sensitive high-performance liquid chromatography - electrospray tandem mass spectrometry method is developed for the simultaneous determination of fluoxetine and its metabolite norfluoxetine in human plasma. Plasma samples were simply treated with acetonitrile to precipitate and remove proteins and the isolated supernatants were directly injected into the high-performance liquid chromatography - electrospray tandem mass spectrometry system. Chromatographic separation of the analytes was achieved on a Discovery C₁₈ (100 × 2.1 mm I.D., particle size 3.0 μm) column using 0.1% formic acid in water - acetonitrile (40: 60) as mobile phase with a flow rate of 0.2 mL/min. Diazepam was used as the internal standard. The compounds were ionized in the electrospray ionization source of the mass spectrometer and were detected by selected reaction ion monitoring of the transitions of m/z 310 → m/z 44.3 for fluoxetine, m/z 296 → m/z 134 for norfluoxetine and m/z 285 → m/z 193 for the internal standard. The method has low limit of detection (LOD) of 0.02 ng/mL and 0.03 ng/mL for fluoxetine and norfluoxetine, respectively. The inter- and intra-run precision was measured to be below 5.3% (relative standard deviation) for both fluoxetine and norfluoxetine. The developed method was successfully used to investigate plasma concentrations of fluoxetine and norfluoxetine in the pharmacokinetic study of Chinese volunteers who received fluoxetine orally. © 2009 Pleiades Publishing, Ltd.

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Research and development on individual virtual intelligent vehicles

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key Engineering Materials 2009年 392-394卷 873-878页

作者： Lou, Y. He, H.W. Lu, Y.M. Huang, C. Faculty of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China Shenzhen Key Laboratory of Advanced Mould Manufacturing Technology Shenzhen 518060 China Faculty of Electromechanical Engineering Guangdong University of Technology Guangzhou 510006 China

Aimed at the individual virtual intelligent vehicles, the individual vision behavior and decision-making behavior of virtual intelligent vehicles are mainly studied. The vision perception picture and fuzzy neural networks decision-making picture are developed and the virtual intelligent vehicles on the platform of dynamic intelligent traffic environment have been built by use of the EONSDK. It not only has improved the reality of traffic environment, and but also can make out the different traffic environment and can simulate various road accident circumstances.

关键词： Decision making

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Sensorless Position and Speed Estimation with Improved Integrator for PMLSM Drive

Sensorless Position and Speed Estimation with Improved Integ...

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2009 IEEE International Conference on Information and Automation(2009年 IEEE信息与自动化国际学术会议)

作者： Huacai Lu Manhua Li Yuetong Xu Anhui Provincial Key Laboratory of Electric and Control Anhui University of Technology and ScienceW Modern Education Center of Anhui University of Technology and Science Wuhu 241000China Zhejiang Province Key Lab of Advanced Manufacturing Technology Zhejiang UniversityHangzhou 310027C

This paper describes a sensorless position and speed detection algorithm designed for permanent magnet linear synchronous motor (PMLSM) drive. Measured line currents and terminal voltages are used to estimate the flux of the α-β axis in stator frame, integrating the back electromotive force (EMF). Position and speed signals are derived from angle of the flux linkage and its change rate. A new improved integrator is presented and analyzed for compensate DC offsets and drift, which invariably exist in any practical implementation based on combination of low-pass filter, highpass filter and PI regulator. Experimental results are presented to show the realization of the objectives.

关键词： Force measurement Low pass filters Detection algorithms Algorithm design and analysis Synchronous motors Current measurement Voltage Stators Force sensors Couplings

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Heterodyne interferometric ellipsometry

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Zhongguo Jiguang/Chinese Journal of Lasers 2009年第2期36卷 439-443页

作者： Deng, Yuanlong Li, Yuezhi Wu, Yubin Xu, Gang College of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China Shenzhen Key Laboratory of Advanced Die-Manufacturing Technology Shenzhen 518060 China

A transmission ellipsometer with the configuration of heterodyne interferometer and two acousto-optical modulators was investigated. A single layer of indium tin oxide on a glass substrate was measured, and the measurement errors of the sample thickness and refractive index range up to 8 nm and 7%, respectively. The influence of the elliptic polarization due to metal-coated mirrors on measurement accuracy was analyzed with Jones vector method. The error only produced by the depolarization effect of metal-coated mirrors can be eliminated just by removing the sample out of the configuration. However, the calibration does not work to the error resulted from the misorientation and the depolarization effect. The calculation shows the error of sample thickness measurement is 4 nm, and the error is approximately linear with the orientation error and independent of the film parameters.

关键词： Tin oxides

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Finite element research of stress intensity factors at surface crack front of hollow axles

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Tiedao Xuebao/Journal of the China Railway Society 2008年第5期30卷 114-118页

作者： Zhou, Su-Xia Xie, Ji-Long Zheng, Hong-Xia Eng. Res. Ctr. of Structure Reliability and Operation Measurement Technol. of Rail Guided Vehicles Beijing Jiaotong University Beijing 100044 China Key Laboratory of Advanced Manufacturing and Automation Technology Ludong University Yantai 264025 China

Accidental damages may occur on the surface of hollow axles of high-speed railway vehicles in running and this may induce surface cracks. The stress intensity factors are important parameters for estimating crack propagation. So the service loads of hollow axles are defined, and the stresses of hollow axle cross sections are obtained according to the load spectrum by finite element calculating. Quarter point 20-node isoparametric degenerative singular elements are used to simulate the stress singularity in the region near the crack tip. The finite element model of crack extension of hollow axles is established, and the crack front is dispersed to realize orthogonal extension. Based on this the stress intensity factors of the crack front are calculated, and the distribution rules of the stress intensity factors of different initial-shapes cracks are obtained. The results show that the crack tends to fall within a special aspect ratio scope with extension. The conclusions agree with the analytic results.

关键词： Finite element method

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Optimal RGCC control with H∞ Norm and control Input Constraints

Optimal RGCC Control with H∞ Norm and Control Input Constra...

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Chinese control and Decision Conference, CCDC

作者： Dengfeng Zhang Hongye Sue Chao Zhao Xianglan Han Key Laboratory of Digital Manufacturing Huaiyin Institute of Technology Huai'an China Institute of Advanced Control Zhejiang University Hangzhou China Ningbo Institute of Technology Zhejiang University Ningbo China

The problem of reliable guaranteed cost control (RGCC) with multiple constraints is investigated against sensor faults for a class of uncertain systems. By linear matrix inequalities (LMI) approach, the state-feedback reliable controller is developed to stabilize the closed-loop system with possible sensor faults and minimize the upper bound of a quadratic cost function. Meanwhile, the upper bounds on the amplitudes of control inputs and the given bound on H infin norm index of disturbance rejection are also guaranteed. Thus, with the above multiple constraints, the resulting closed-loop system can provide satisfactory stability, external disturbance attenuation level and optimized quadratic cost performance despite of possible sensor faults.

关键词： Cost function Symmetric matrices Linear matrix inequalities Upper bound Actuators Uncertain systems Gain

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