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Preparation and characterization of PZT thick film enhanced by ZnO nanowhiskers for MEMS piezoelectric generators

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Progress in Natural Science:Materials International 2011年第2期21卷 159-163页

作者： Zhong-xia DUAN~1,guo-qin yu~2,Jun-biao LIU~1,Jun LIU~2,Xiao-wen DONG~2,Li HAN~1,Peng-yun JIN~1 1.institute of {1. engineering,chinese academy of sciences,beijing 100190,china 2.Shanghai Municipal Electric Power Company,Shanghai 200025,china institute of {1. engineering Chinese Academy of Sciences Beijing 100190 China Shanghai Municipal Electric Power Company Shanghai 200025 China

A hybrid sol-gel route which was used to fabricate PZT thick film for MEMS piezoelectric generators was investigated. （1.0）-oriented Pb(Zr0.52Ti0.48)O3thick films enhanced by ZnO nanowhiskers（ZnOw） were successfully prepared on Pt/Cr/SiO2/Si substrates via spin-coating ZnOwsuspension and PZT *** influences of film thickness on the microstructure and electrical properties of composite thick film were *** results show that PZT composite thick films have（1.0）-oriented perovskite *** results show that,the surface of as-prepared（1.0）-oriented PZT piezoelectric composite thick film is smooth,compact and crack-free,and the cross section is *** composite thick films exhibit good ferroelectric,dielectric and piezoelectric properties.2 urn-thick（1.0）-oriented PZT piezoelectric composite thick film has the remnant polarization intensity and coercive field of 6.7μC/cm2and 92.5 kV/cm,the dielectric constant and dielectric dissipation of 1.431.and 0.44,respectively,and piezoelectric constant d33is calculated to be 1.1.0 pC/*** composite thick film is good to meet the use of MEMS piezoelectric generators.

关键词： PZT thick film ZnO nanowhisker electrical properties piezoelectric generator

Efficient growth inhibition of ErbB2-overexpressing tumor cells by antiErbB2 ScFv-Fc-IL-2 fusion protein in vitro and in vivo

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Acta Pharmacologica Sinica 2007年第10期28卷 1611-1620页

作者： Ming SHI~1.Ling ZHANG~2,Hong-tao gu~2,Feng-qin JIANG~2,Lu QIAN~1.Ming yu~1.{1.-jiang CHEN~1.Qun LUO~3,Bei-fenSHEN~1.Ning {1.~(1.4)~1.institute of Basic Medical {1.,beijing 1.0850,china ~2 institute of Basic Medical {1.,The academy of Medical Science of ShandongProvince,Ji-nan 250062,china ~3 301.Hospital,beijing 1.0853,china institute of Basic Medical {1. Beijing China institute of Basic Medical {1. The Academy of Medical Science of Shandong Province Ji-nan China 301.Hospital Beijing China

Aim:To investigate the antitumor activities of an anti-ErbB2 scFv-Fc-interleukin2 (IL-2) fusion protein (HFI) in vitro and in ***:Fusion protein HFI *** efficacy of HFI in mediating tumor cell lysis was determined bycolorimetric lactate dehydrogenase release *** antitumor activity of HFIwas evaluated in tumor xenograft ***:The fusion protein was foldedas a homodimer formed by covalently linking Fc portions and it retained ErbB2specificity and IL-2 biological *** mediated antibody-dependent cell-mediated cytotoxicity (ADCC) at low effector-to-target ratios in vitro and im-proved the therapeutic efficacy of IL-2 in experiments in ***:Thegenetically-engineered anti-ErbB2 scFv-Fc-IL-2 fusion protein exhibited high ef-ficiency both in mediating ADCC in vitro and significant antitumor activity intumor xenograft models.

关键词： ErbB2 antibody interleukin-2 fusion protein tumor

Accurate and efficient floor localization with scalable spiking graph neural networks

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Satellite Navigation 2024年第1期5卷 191-206页

作者： Fuqiang gu Fangming guo Fangwen {1. Xianlei Long Chao Chen Kai Liu Xuke Hu Jianga Shang Songtao guo College of Computer Science Chongqing UniversityChongqingChina Department of Precision Instrument Tsinghua UniversityBeijingChina institute of Data Science German Aerospace Center(DLR)JenaGermany School of Computer Science China University of GeosciencesWuhanChina

Floor localization is crucial for various applications such as emergency response and rescue,indoor positioning,and recommender *** existing floor localization systems have many drawbacks,like low accuracy,poor scalability,and high computational *** this paper,we first frame the problem of floor localization as one of learning node embeddings to predict the floor label of a ***,we introduce FloorLocator,a deep learning-based method for floor localization that integrates efficient spiking neural networks with powerful graph neural *** approach offers high accuracy,easy scalability to new buildings,and computational *** results on using several public datasets demonstrate that FloorLocator outperforms state-of-the-art ***,in building B0,FloorLocator achieved recognition accuracy of 95.9%,exceeding state-of-the-art methods by at least 1.%.In building B1.it reached an accuracy of 82.1.,surpassing the latest methods by at least 4%.These results indicate FloorLocator’s superiority in multi-floor building environment localization.

关键词： Indoor positioning Deep learning Floor localization Spiking neural networks Graph neural networks

Implantable CMOS neuro-stimulus chip for visual prosthesis

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Science china(Information {1.) 2011年第4期54卷 898-908页

作者： ZHANG Xu 1.PEI WeiHua 1.HUANG BeiJu 1.WANG ShuJing 1.guAN Ning 1.guo Kai 1.WANG {1. 1.guI Qiang 1.CHEN Jin 1.WANG Kai 2,WU HuiJuan 2,LI XiaoXin 2,LI Kai 3 & CHEN HongDa 1.1.State Key Laboratory on Integrated Optoelectronics,institute of Semiconductors,{1. academy of sciences,beijing 1.0083,china 2 Department of Ophthalmology,People’s Hospital of Peking University,beijing 1.0044,china 3 Department of Epidemiology and Biostatistics,Health Science Center,Peking University,beijing 1.0083,china State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Beijing China Department of Ophthalmology People’s Hospital of Peking University Beijing China Department of Epidemiology and Biostatistics Health Science Center Peking University Beijing China

A prototype chip with 2×2 pixels for implanting in blind patients affected by outer retinal degeneration is presented in this *** visual prosthesis chip imitates the degenerated photoreceptor cells,senses the incident light and stimulates the remaining healthy layers of retina or optic *** pixel integrates photodiode and stimulus pulse generator,converting the illumination on the eyes into 3-bit resolution bi-phasic current ***-chip charge cancellation modules are used to discharge each electrode site for tissue *** prototype chip is designed and fabricated in 0.1.-μm N-well CMOS (complementary metal oxide semiconductor) 1.6M Mix-signal process,with a ±2.5 V dual voltage *** functionality of the fabricated chip is demonstrated on anesthetized *** responses in visual cortex are successfully evoked by the neuro-stimulus chip through an on-board trigger interface and flexible electrode.

关键词： biomedical microelectronics visual prosthesis functional electrical stimulation acute animal ex- periment electrical evoked potential (EEP) test

Comparison of the influence factors on NDVI for CCD camera and WFI imager on CBERS-02

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Science china(Technological {1.) 2005年第S2期48卷 100-115页

作者： yu Tao1.3, LI Xiaoying1.2,3, ZHANG Yong1.2,3, ZHAO Feng1.2,3, gu Xingfa1.3,4, ZHU Li1.2,3, WANG Pengxin5 & MIN Xiangjun6 1. State Key Laboratory of Remote Sensing Science {1. of Remote Sensing Application, CAS, Bei- jing 1.01.1.{1. 2. Graduate University of chinese academy of sciences, beijing 1.0039,{1. 3. The Center for National Spaceborne Demonstration, beijing 1.01.1.{1. 4. Institut National de la Recherche Agronomique, Climat Sol Environnement, 8491. Avignon, France 5. College of Information and electrical engineering,{1. Agricultural University, beijing 1.0083,{1. 6.{1. Center for Resource Satellite Data and Application, beijing 1.0830,{1. State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Application CAS Beijing 100101 China Center for National Spaceborne Demonstration Beijing 100101 China Graduate University Chinese Academy of Sciences Beijing 100039 China Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France College of Information and electrical {1. China Agricultural University Beijing 100083 China china Center for Resource Satellite Data and Application Beijing 100830 China

CCD and WFI are payloads in the visible light and near infrared bands on CBERS satellites and they have not been applied widely, especially WFI. This article mainly probes into the potential of these two sensors’ application in the vegetation monitoring and analyses the influences of radiometric calibration, atmosphere conditions and sun-observing geometry, etc. on NDVI obtained from these two sensors respectively. In addition it analyses the effect of the spectral response difference of red and near infrared spectral bands in CCD and WFI sensors on NDVI. Results indicate that radiometric calibration is the most important factor on NDVI, which cannot be applied to vegetation monitoring without radiometric calibration. Results also demonstrate that near surface NDVI is different greatly from that of TOA which change with atmosphere conditions. The study shows that NDVI is also affected by the non-lambertian character of surface and the change of the atmospheric path with the observing geometry. And NDVI of WFI is higher than that of CCD. They are very different because of their spectral difference, but they have a good linear relevant relationship.

关键词： CCD WFI NDVI LAI.

Tuning electronic properties of cobalt phthalocyanines for oxygen reduction and evolution reactions

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Science china Chemistry 2024年第1期67卷 398-407页

作者： Jianlin Jiang Zhen Liu Shuaijun Pan Xinnian Xia Bing Qin Yang Hu Xuxu Wang Jiamin Lan yu gu Encai Ou Weijian Xu Joseph J.Richardson Rui {1. SINOPEC Research institute of Petroleum Processing Co. Ltd.Beijing 100083China College of Chemistry and Chemical engineering Hunan UniversityChangsha 410082China College of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China Department of Chemical engineering The University of MelbourneParkville 3010Australia College of Environmental Science and engineering Hunan UniversityChangsha 410082China School of engineering RMIT UniversityMelbourneVictoria 3001Australia

Metal–phthalocyanines are a class of catalytically active materials promising in energy conversion and storage fields(e.g.,electrocatalysis).However,understanding and controlling the electrochemical properties in metal-phthalocyanine systems is ***,we elucidate the electrocatalytic origins of a series of cobalt-phthalocyanine molecular catalysts and finetune their electronic properties at the atomic level,both experimentally and *** interactions between the cobalt center and the local coordination environment are regulated by introducing either electron-donating or electron-withdrawing groups on the phthalocyanine ligand,and the spin-orbit splitting of cobalt is increased by~0.1. eV compared with the nonsubstituted ***,the aminated cobalt phthalocyanine-based electrocatalysts exhibit low free energies in the ratedetermining steps of the oxygen reduction(-1.68 eV)and oxygen evolution reactions(0.37 eV).This contributes to the high electrocatalytic activity(e.g.,a halfwave potential of 0.84 V and an overpotential of 0.30 V at 1. mAcm^(-2)),featuring a high selectivity of a four-electron pathway(i.e.,a negligible by-product of hydrogen peroxide).These catalysts also exhibit exceptional kinetic current density(Tafel slope of 1.0 mV dec^(-1.)in oxygen reduction reactions,in addition to a superior power density(1.8 mWcm^(-2))and a high cycling stability(>1.300 cycles)in Zn-air batteries,outperforming the commercial Pt/C and/or RuO2counterparts.

关键词： interfacial wettability molecular catalysts carbon nanotubes density functional theory electrochemistry

Review of electrical and Electronic Architectures for Autonomous Vehicles:Topologies,Networking and Simulators

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Automotive Innovation 2024年第1期7卷 82-101页

作者： Wenwei Wang Kaidi guo Wanke Cao Hailong Zhu Jinrui Nan Lei {1. National engineering Research Center of Electric Vehicles Beijing Institute of Technology(BIT)Beijing 100081China Shenzhen Automotive Research institute Beijing Institute of Technology(BIT)Shenzhen 518000China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationBeijing 100876China Purple Mountain Laboratories Nanjing 211111China beijing Kawen New Energy Vehicle Co. LTDBeijing 102209China

With the rapid development of autonomous vehicles,more and more functions and computing requirements have led to the continuous centralization in the topology of electrical and electronic(E/E)*** certain Tier1.suppliers,such as BOSCH,have previously proposed a serial roadmap for E/E architecture development,implemented since 201. with significant contributions to the automotive industry,lingering misconceptions and queries persist in actual {1. ***,there are concerns regarding the perspective of zone-oriented E/E architectures,characterized by zonal concentration,as successors to domain-oriented E/E architectures,known for functional *** these misconceptions and queries,this study introduces a novel parallel roadmap for E/E architecture development,concurrently evaluating domain-oriented and zone-oriented ***,the study explores hybrid E/E architectures,amalgamating features from both *** align with the evolution of E/E architectures,networking technologies must adapt *** networking mechanisms pivotal in E/E architecture design are comprehensively ***,the study delves into modeling and verification tools pertinent to E/E architecture *** conclusion,the paper outlines existing challenges and unresolved queries in this domain.

关键词： Autonomous vehicles electrical and electronic architectures Topology Networking Domain-oriented Zone-oriented

A stable radiochromic semiconductive viologen-based metal-organic framework for dual-mode direct X-ray detection

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chinese Chemical Letters 2024年第9期35卷 437-441页

作者： Xuying yu Jiarong Mi yulan Han Cai Sun Mingsheng Wang guocong guo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350608China College of Chemistry Fuzhou UniversityFuzhou 350108China University of chinese academy of sciences Beijing 100049China School of Chemistry and Chemical engineering Queen’s University BelfastBelfast BT95AGUnited Kingdom

Direct X-ray detectors,which directly convert X-rays into electrical signals through semiconductors,have higher space solution than scintillator-mediated indirect X-ray ones and are high desirable for early cancer detection and other applications,but the mainstream commercialα-Se detector is still largely limited by high production costs,large leakage current and low *** article reports an easily prepared,stable radiochromic semiconductive metal–organic framework(MOF),(MV)[Cd_(3)(tdc)_(4)]·2H_(2)O(RCS-1.H_(2)tdc=2,5-thiophenedicarboxylic acid;MV^(2+)=methyl viologen cation)with direct X-ray detecting *** a large bulk resistivity of 8.40×1.^(9)Ωcm,this material ensures minimal dark current and low noise for X-ray ***,it exhibits higher sensitivity to W KαX-rays(98.58μC Gy^(-1.cm^(-2))thanα-Se(~20μC Gy^(-1.cm^(-2)).Meanwhile,unlike most reported direct X-ray detecting semiconductors,compound RCS-1.shows remarkable color change upon X-ray irradiation owing to the presence of photochromism-active viologen *** feature offers an appealing visual detecting ability to direct X-ray detectors that provide only the electrical signals.

关键词： Metal-organic framework Viologen Photochromism Conductance X-ray detection

In flight MTF monitoring and compensation for CCD camera on CBERS-02

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Science china(Technological {1.) 2005年第S2期48卷 29-43页

作者： gu Xingfa1.2,3, LI Xiaoying1.2,4, MIN Xiangjun5, yu Tao1.2, SUN Jijuan5, ZENG Yong1.2,4, XU Hua1.2 & {1. Ding2,6 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the institute of Remote Sensing Applications of{1. and beijing Normal University, beijing 1.01.1. china 2. The Center for National Spaceborne Demonstration, beijing 1.01.1. china 3. Institut National de la Recherche Agronomique, Climat Sol Environnement, 8491. Avignon, France 4. Graduate University of{1., beijing 1.0039, china 5. china Center for Resource Satellite Data and Application, beijing 1.0830, china 6. University of Electronic Science and Technology of china, Chengdu 61.054, china State Key Laboratory of Remote Sensing Science Beijing Normal University Chinese Academy of Sciences Beijing 100101 China Center for National Spaceborne Demonstration Beijing 100101 China Institut National de la Recherche Agronomique Climat Sol Environnement 84914 Avignon France Graduate University Chinese Academy of Sciences Beijing 100039 China china Center for Resource Satellite Data and Application Beijing 100830 China University of Electronic Science and Technology of china Chengdu 610054 China

In this article, the approach of simulating ideal tarp scene was proposed to determine the MTF for CCD camera on CBERS-02. The MTF acquired from this technique was compared to those from some common methods. MTFs achieved from different approaches were employed to compensate the CCD images based on three restoration algorithms: the iterative method, the Wiener filter and the modified inverse filter (MIF). The two-dimensional MTF was established with the value at frequency 0.5 for 45° directional MTF as the value at its four corners. This article addressed the variations of the restored CCD images with different techniques of constructing two-dimensional MTF, restoring algorithms and determining the in-flight MTFs. Results showed images restored with the MTF determined from the technique of simulating ideal tarp scene represent the real scene best. And the restoration technique based on the MIF would produce better restored images than the other two techniques. This research also demonstrated that the two-dimensional MTF used for restoration should be interpolated under the control of the MTF for 45° axis, rather than by multiplying the cross-orbit MTF with along-orbit MTF.

关键词： CBERS-02 CCD MTF the technique of simulating ideal tarp scene.