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2nd International Asia Conference on Informatics in Control, Automation and Robotics (CAR)

作者： Zhang, Wenzeng Zhao, Deyang Chen, Qiang Du, Dong Minist Educ Dept Mech Engn Key Lab Adv Mat Proc Technol Beijing Peoples R China

ISBN: (纸本)9781424451944

The single-motor multiple DOFs under-actuated finger is the focus of robot research. The grasping force of traditional under-actuated hands based on linkages is hard to control. The traditional hands also have many differences from human hands in appearance. Aiming to solve these problems, this paper has presented a novel under-actuated hand based on linkages, which also comprises of slider mechanisms and springs. Its finger has a changeable force output controlled by a motor with humanoid appearance. It also can adapt to the shape of objects. This article analyzed the force properties of the finger. According to this, a 2-DOF finger and a 3-DOF finger were designed. Finally, they are included in the hand named TH-3L, which comprises of five fingers and six motors with 15 DOFs.

关键词： words Robotic hand Under-actuated mechanism Self-adaptive grasp Changeable grasping force Linkage mechanism

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Controlled release of bovine serum albumin from chitosan membranes in vitro

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MEDICINAL CHEMISTRY research 2010年第9期19卷 1055-1063页

作者： Wang, Yaling Shao, Jian Meng, Ying Yang, Yumin Nantong Univ Jiangsu Prov Key Lab Neuroregenerat Nantong 226001 Jiangsu Peoples R China Nantong Univ Sch Chem & Chem Engn Nantong 226001 Jiangsu Peoples R China

Chitosan membranes loaded with bovine serum albumin (BSA;BSA/chitosan membranes) were prepared by either oven-drying or lyophilization. The encapsulation of BSA was mostly > 80%. Controlled release of BSA from the membranes into phosphate-buffered saline (PBS;pH 7.4) was determined with Coomassie brilliant blue at different time periods. The highest cumulative amount of released BSA was 17.30% after 20 days. The optimized chitosan concentration was found to range from 10 to 20 g/l. The most favorable drying temperature for the membrane preparation was 55A degrees C. And membranes made by lyophilization were more porous and uniform than those made by oven-drying.

关键词： Chitosan In vitro release Membrane Protein

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Intrinsic vacancies in cubic-zirconia bulk and surface

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JOURNAL OF ALLOYS AND COMPOUNDS 2010年第2期506卷 898-901页

作者： Shen, Pei Jun Jiang, San Ping Ong, Khuong Phuong Ding, Wei Zhong Mao, Pei-Lin Lu, Xiong Gang Li, Chong He Wu, Ping Shanghai Univ Dept Mat Sci & Engn Shanghai 200444 Peoples R China Inst High Performance Comp Computat Mat Sci & Engn Program Singapore Singapore Nanyang Technol Univ Sch Mech & Aerosp Engn Singapore Singapore Nanyang Polytech Sch Chem & Life Sci Singapore Singapore

Formation of charged (neutral) vacancies of bulk (surface) cubic-zrO(2) is calculated from density functional theory, and compared with available experiments. Relationships among vacancy formation energy, electron and element chemical potentials are established within a wide range of oxygen chemical potentials. The +2 (-2) oxygen (zirconium) vacancy is predicted stable near the valence (conduction) band edge of the bulk, and the neutral oxygen vacancy has the lowest formation energy on (1 0 0) O-terminated surface without exhibiting a defect state within the band gap. Therefore, manipulation of oxygen vacancy concentration becomes possible by optimizing growth surface and oxygen chemical potentials. (C) 2010 Elsevier B.V. All rights reserved.

关键词： Cubic-zirconia Intrinsic vacancy Formation energy

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research on Machining Error Compensation in high-precision Surface Grinding Machine for Optical Aspheric Elements

Research on Machining Error Compensation in High-precision S...

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5th International Symposium on Advanced Optical Manufacturing and Testing technologies - Advanced Optical Manufacturing technologies

作者： Ke Xiaolong Guo Yinbiao Zhang Shihan Huang Hao Xiamen Univ Dept Mech Electro Engn Xiamen 361005 Peoples R China Chengdu Fine Opt Engn Res Ctr Chengdu 610041 Peoples R China

ISBN: (纸本)9780819480859

Using aspheric component in optical system can correct optical aberration, acquire high imaging quality, improve the optical characteristic, simplify system structure, and reduce system volume. Nowadays, high-precision surface grinding machine is an important approach to processing optical aspheric elements. However, because of the characteristics of optical aspheric elements, the processing method makes a higher demand to whole performance of surface grinding machine, and hardly to achieve ideal machining effect. Taking high generality and efficiency into account, this paper presents a compensation method for machining errors of high-precision surface grinding machine, which bases on optical aspheric elements, to achieve high-precision machining for all kinds of optical aspheric elements. After compensation, the machining accuracy of grinding machine could reach 2um/200x200mm. The research bases on NC surface grinding machine which is self developed. First of all, this paper introduces machining principle for optical aspheric elements on the grinding machine. And then error sources which producing errors are analyzed. By contacting and non-contacting measurement sensors, measurement software which is self designed realizes on-position measure for grinded workpiece, then fits surface precision and machining errors. Through compensation software for machining error which is self designed, compensation algorithm is designed and translated compensation data into G-code for the high-precision grinding machine to achieve compensation machining. Finally, by comparison between machining error compensation before and after processing, the experiments for this purpose are done to validate the compensation machining accuracy.

关键词： Optical aspheric elements grinding machine machining error compensation

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Improvement of a 3D radar backscattering model using matrix-doubling method

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Science china Earth Sciences 2010年第7期53卷 1029-1035页

作者： NI WenJian1,2, GUO ZhiFeng1 & SUN GuoQing3 1 State Key Laboratory of Remote Sensing Science, jointly sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, china 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, china 3 Department of Geography, University of Maryland, College Park, MD 27042, USA 1. State Key Laboratory of Remote Sensing Science jointly sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing 100101 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Department of Geography University of Maryland College Park MD 27042 USA

Radiative transfer models have been widely used to simulate the radar backscattering from forested areas. A three-dimensional radar backscatter model of forest canopy developed in previous studies takes full account of spatial position of trees in a forest stand, and the interactions among crown, trunk and ground surface. The model predicted well for the co-polarized backscatter measurements, but underestimated the backscattering for cross-polarization, primarily because only the first-order scattering within tree crowns was considered in the model. The backscattering at cross-polarization depends strongly on multiple scatter- ing within tree crowns. To produce good estimations for cross-polarized component, the matrix-doubling method is employed here to compute multiple-scattering within the crown. The modified model is compared with the original model, and the field forest measurements and AIRSAR data are used for validation of the modified model. The cross-polarization backscattering is improved in different degrees for different crown structures and at different bands.

关键词： remote sensing forestry electromagnetic propagation radar backscattering model matrix-doubling

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Protective Immunity Transferred by Infusion of Cytomegalovirus-Specific CD8⁺ T Cells within Donor Grafts: Its Associations with Cytomegalovirus Reactivation Following Unmanipulated Allogeneic Hematopoietic Stem Cell Transplantation

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BIOLOGY OF BLOOD AND MARROW TRANSPLANTATION 2010年第7期16卷 994-1004页

作者： Luo, Xiao-Hua Huang, Xiao-Jun Liu, Kai-Yan Xu, Lan-Ping Liu, Dai-Hong Peking Univ Peoples Hosp Inst Hematol Beijing 100044 Peoples R China Chongqing Med Univ Childrens Hosp Dept Oncohaematol Chongqing Peoples R China

Human cytomegalovirus (CMV)-specific cytotoxic T lymphocyte (CTL) immune response must be reconstituted for long-term protection against CMV relapse and disease in hematopoietic stem cell transplantation (HSCT) recipients. We phenotypically quantitated absolute numbers of CMV-pp65 peptide-specific CTLs (CTLcmv) in 50 related donor unmanipulated allografts infused into HLA-matched or-mismatched recipients and examined the incidence of CMV reactivation. high CTLcmv with terminally differentiated effector CD45RO(-)CD62L(-) cell (T-EMRA) phenotype in the allografts were associated with reduced risk of CMV reactivation, in the presence of sufficient CD45RO(+)CD62L(-) cell (T-EM) infusion (>= 0.208 x 10(6)/kg). Early after transplantation, there was significant expansion of CTLcmv with the central memory CD45RO(+)CD62L(+) cell (T-CM) phenotype when CMV was reactivated. The frequencies of CTLcmv T-Naive (CD45RO(-)CD62L(+)), T-CM, and T-EM at day 90 posttransplantation and of CTLcmv T-EMRA at day 60 posttransplantation were greater in recipients with higher infusions of CTLCMV T-EMRA, suggesting protective immunity transferred by infusion of CTLcmv within allografts. Moreover, the majority of the CTLcmv identified in the recipients early after HSCT was of donor origin. Our findings support that measuring levels of CTLCMV and its subsets in the donor grafts and manipulating these cells early after transplantation may help control CMV reactivation, which is closely correlated with immune reconstitution and differentiation of CTLcmv subsets. Biol Blood Marrow Transplant 16: 994-1004 (2010) (C) 2010 American Society for Blood and Marrow Transplantation

关键词： Allogeneic hematopoietic stem cell transplantation CMV reactivation Antigen-specific CTL Donor grafts

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Calculation of the extreme ultraviolet radiation of the earth's plasmasphere

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Science china(technological Sciences) 2010年第1期53卷 200-205页

作者： FOK Mei-Ching NASA Goddard Space Flight Center GreenbeltMD 20771USA

The dynamic global core plasma model(DGCPM) is used in this paper to calculate the He+ density distribution of the Earth's plasmasphere and to investigate the configurations and 30.4 nm radiation properties of the *** comparisons between the simulation results and IMAGE mission observations show:That the equatorial structure of the plasmapause is mainly located near 5.5 RE and the typical scale of plasmasphere shrinking or expansion within 10 min is approximately 0.1 RE;that the plasmaspheric shoulders are formed and rotate noon-ward from the dawn sector under the conditions of strong southward turning of the interplanetary magnetic field(IMF);that the plasmaspheric plumes will rotate dawn-ward from the night sector and become narrow for the southward turning of the *** simulated images from the lunar orbit show that the plasmasphere locating within the geocentric distance of 5.5 RE corresponds to field of view(FOV) of 10.7°×10.7° for the moon-based EUV imager,and that the 30.4 nm radiation intensity of the plasmasphere is 0.1-11.4 *** plasmaspheric shoulders and plumes locating toward the moon-side are for the first time simulated with typical scale level of 0.1 RE from the side view of the *** simulated results provide an important theoretical basis for the lunar-based EUV camera design.

关键词： earth’s plasmasphere dynamic global core plasma model extreme ultraviolet radiation lunar-based imaging

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ASK1-JNK Signaling Cascade Mediated Ad-ST13-Induced Apoptosis in Colorectal HCT116 Cells

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JOURNAL OF CELLULAR BIOCHEMISTRY 2010年第3期110卷 581-588页

作者： Yang, Min Yu, Mingcan Guan, Don Gym Gli, Jinfa Cao, Xin Wang, Weiyun Zheng, Shu Xu, Yingying Shen, Zonghou Liu, Xinyuan Fudan Univ Shanghai Med Coll Dept Biochem & Mol Biol Shanghai 200032 Peoples R China Chinese Acad Sci Shanghai Inst Biol Sci Inst Biochem & Cell Biol Mol Cell Biol Lab Shanghai 200031 Peoples R China Emory Univ Kathleen B & Mason Lowance Ctr Human Immunol Atlanta GA 30322 USA Zhejiang Sci Tech Univ Coll Life Sci Xu Yuan Inst Med & Biotechnol Hangzhou 310018 Peoples R China

ST13, a co-factor of heat shock protein, has shown potential antitumor efficacy for colorectal cancer in our previous study. However, the molecular mechanisms governing ST13-induced apoptosis are poorly understood. Here, we demonstrate that Ad-ST13 (ST13 mediated by adenovirus) activates apoptosis signal-regulated kinase (ASK I) and c-Jun N-terminal kinase (JNK) but not p38 (mitogen-activated protein kinase) in human colorectal HCT116 cells. Ad-ST13 also increases extracellular-regulated kinase (ERK) phosphorylation levels, but the change is due to adenovirus replication. Overexpression of ST13 also increases the transcription activity of AP-1. Blocking ASK1-JNK pathway affects Ad-ST13-mediated colorectal cell apoptosis, decreases the release of cytochrome c in cytoplasm and caspase activation. Because ASK! is known to contain a tetratricopeptide repeat (TPR)-acceptor site and ST13 has TPR domain, we found the interaction between ST13 and ASK1. These results strongly indicate Ad-ST13 triggers colorectal cell apoptosis via ASK1-JNK signaling cascade. J. Cell. Biochem. 110: 581-588, 2010. (C) 2010 Wiley-Liss, Inc.

关键词： ST13 hiP ASK1 JNK APOPTOSIS

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Vs-star: A visual interpretation system for visual surveillance

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PATTERN RECOGNITION LETTERS 2010年第14期31卷 2265-2285页

作者： Huang, Kaiqi Tan, Tieniu Chinese Acad Sci Inst Automat Natl Lab Pattern Recognit Beijing 100864 Peoples R China

In recent year, intelligent visual surveillance has become more and more important for enhanced security. In this paper, we will introduce some recent work in image and video understanding. First, we will give an introduction of the related video surveillance system in recent years, in particular, we will describe algorithms and systems developed in our group for the automatic interpretation of human and vehicle motion in surveillance videos, where automatic interpretation involves object motion detection, object classification and recognition, object tracking and the analysis of object behaviors in order to detect abnormal behaviors. We also give some examples of the real applications of Vs-star system. (C) 2010 Published by Elsevier B.V.

关键词： Visual interpretation Surveillance Enhanced security System

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Reduced Grain Size and Improved Thermoelectric Properties of Melt Spun (Hf,Zr)NiSn Half-Heusler Alloys

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JOURNAL OF ELECTRONIC MATERIALS 2010年第9期39卷 2008-2012页

作者： Yu, Cui Zhu, Tie-Jun Xiao, Kai Shen, Jun-Jie Yang, Sheng-Hui Zhao, Xin-Bing Zhejiang Univ Dept Mat Sci & Engn State Key Lab Silicon Mat Hangzhou 310027 Zhejiang Peoples R China

Half-Heusler thermoelectric materials Hf(/Zr)NiSn were prepared by levitation melting followed by melt-spinning to refine the boundary structures, and then they were consolidated by spark plasma sintering. X-ray diffraction analysis and scanning electron microscopy showed that single phased half-Heusler compounds without compositional segregation had been obtained. It was found that the thermoelectric properties, especially the thermal conductivity, depended strongly on the boundary structures. The melt-spinning samples with refined boundary structures had a lower thermal conductivity but a power factor comparable to that of the sample prepared by levitation melting, thus providing good thermoelectric properties.

关键词： Half-Heusler thermoelectric melt-spinning

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