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fMRI time series analysis based on stationary wavelet and spectrum analysis

Progress in Natural Science:Materials International 2006年第11期16卷 1171-1176页

作者： ZHI Lianhe~ 1,2,3., ZHAO Xia~4. SHAN Baoci~1**, PENG Silong~5. YAN Qiang~1, YUAN Xiuli~1 and TANG Xiaowei~ 1,6 (1. Key Laboratory of Nuclear Analysis Techniques, institute of High Energy Physics, chinese {3. of Sciences, beijing 10004., China 2. Graduate School of chinese {3. of Sciences, beijing 10004., China 3. Department of Physics, Zhoukou Normal University, Zhoukou 4.6100, China 4. Research Imaging center, University of Texas Health Science center, San Antonio, Texas 78229, USA 5. national asic design and engineering center, institute of automation, chinese {3. of Sciences, beijing 10004., China 6. Department of Physics, Zhejiang University, Hangzhou 3.0027, China) [a]Key Laboratory of Nuclear Analysis Techniques Institute of High Energy Physics Chinese Academy of Sciences Beijing China [b]Graduate School of chinese academy of Sciences Beijing China [c]Department of Physics Zhoukou Normal University Zhoukou China [d]Research Imaging center University of Texas Health Science Center San Antonio Texas USA [e]national asic design and {3. {4. Institute of Automation Chinese Academy of Sciences Beijing China [f]Department of Physics Zhejiang University Hangzhou China

The low signal to noise ratio (SNR) of functional MRI (fMRI) prefers more sensitive data analysis methods. Based on stationary wavelet transform and spectrum analysis, a new method with high detective sensitivity was developed for analyzing fMRI time series, which does not require any prior assumption of the characteristics of noises. In the proposed method, every component of fMRI time series in the different time-frequency scales of stationary wavelet transform was discerned by the spectrum analysis, then the components from noises were removed using the stationary wavelet transform, finally the components of real brain activation were detected by cross-correlation analysis. The results obtained from both simulated and in vivo visual experiments illustrated that the proposed method has much higher sensitivity than the traditional cross-correlation method.

关键词： fMRI stationary wavelet transform spectrum analysis data analysis.

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Development of silicon-based microelectrode array

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Science China(Technological Sciences) 2009年第8期52卷 2391-2395页

作者： LIN JianHui1,2,3. WU XiaoMing1,2,3.4. HUANG PengSheng1,2, FENG Lei5. REN TianLing1,2 & LIU LiTian1,2 1 institute of Microelectronics, Tsinghua University, {4. 100084. China 2 Tsinghua {3. Laboratory for Information Science and Technology, {4. 100084. China 3.Yangtze Delta Region institute of Tsinghua University, Jiaxing 3.4.5., China 4.State Key Laboratory of Transducer Technology, {5. academy of Sciences, Shanghai 20005. China 5.Department of Biomedical engineering, Tsinghua University, {4. 100084. China 1. institute of Microelectronics Tsinghua University Beijing 100084 China 2. Tsinghua national Laboratory for Information Science and Technology Beijing 100084 China 3. Yangtze Delta Region institute of Tsinghua University Jiaxing 314050 China 4. State Key Laboratory of Transducer Technology Chinese Academy of Sciences Shanghai 200050 China 5. Department of Biomedical engineering Tsinghua University Beijing 100084 China

This paper introduces in details a kind of silicon-based microelectrode array. MEMS (micro-electromechanical system) technology is used in the fabrication of the microelectrode array, which is designed to perform signal recording and electrical stimulation for nerves in neural engineering. A simple fabrication process is developed. An improved model of microelectrodes is brought forward and successfully validated by the excellent match between circuit simulations and electrical measurements, including both magnitude and phase of microelectrode impedance. Compared with the simple one that is usually used, the improved model is believed to be an advance and more accurate. This modeling helps to improve the design of microelectrodes and understand the behavior of interface between electrode and cell. Furthermore, the microelectrode is proved to be a feasible tool for researches in neural engineering by successfully recording neural activities of sciatic nerve of a bullfrog.

关键词： microelectrode array MEMS neural engineering

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GIS-based risk analysis of debris flow:an application in Sichuan, southwest China

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International Journal of Sediment Research 2008年第2期23卷 138-148页

作者： B.F.DI1,2,3.N.S.CHEN1,P.CUI1,Z.L.LI1,Y.P.HE4.and Y.C.GAO1 3.1 Ph.D.,Chengdu institute of Mountain Hazards and Environment,CAS,Chengdu 61004.,China,Department of Architecture & Environment,Sichuan University,Chengdu 610065.China,Graduate University of {4. {3. of Sciences,beijing {4.,China,2 Prof.,Department of Architecture & Environment,Sichuan University,Chengdu 610065.China,3.Graduate University of {4. {3. of Sciences,beijing {4.,China 4.Department of Civil and Environmental {14.,San Diego State University,5.00 Campanile Dr.San Diego,CA 92121,USA [a]Ph.D. Chengdu institute of Mountain Hazards and Environment CAS Chengdu 61004. China Department of Architecture & Environment Sichuan University Chengdu 610065 China Graduate University of chinese academy of Sciences beijing 10004. China [b]Prof. Department of Architecture & Environment Sichuan University Chengdu 610065 China [c]Graduate University of chinese academy of Sciences beijing 10004. China [d]Department of Civil and Environmental engineering San Diego State University 5.00 Campanile Dr. San Diego CA 92121 USA

Debris flow is a serious geologic hazard in *** is estimated that nationally debris flows cause up to 2 billion RMB(25. million US$) in damages and 3.0-600 deaths and injuries *** mitigate debris flow hazards,it is necessary to map,model,and identify zones of debris flow hazards and vulnerability as to inform the local people about the potential risk with a geographic information *** research presents a regional scale case study modeling debris flow risk(hazard and vulnerability) in Sichuan Province,Southwestern *** this area,3.290 debris flows have been identified and the spatial-temporal distribution and activity characteristics of them have been *** on the available meteorological data,a Digital Elevation Model with the rate of 1:25.,000 and a regional geological map,the 24.hr rainfall threshold(y) for debris flow occurrence is closely related(significant at 99% confidence level) to the index(x) defined using a geology factor(rock hardness:a) and a topographical factor(channel gradient:d) where y = 21 + 10200 / x,in which x = 2.7 × ea + 1000 × *** discipline is constructive in developing the rainfall threshold for debris flow activity in remote mountainous areas that lack *** a given watershed,a four-level debris flow hazard map is developed by comparing the rainfall threshold to the {3. rainfall intensities with 5.-,20-,and 5.year average recurrence intervals,*** degree of debris flow vulnerability is determined by the watershed socio-economic conditions.A four-class debris flow risk map,at the final phase of the research,is generated by combining debris flow hazards and *** the debris flow risk assessment,the Sichuan Province is classified into the slight,moderate,severe and very severe regions,which accounts for 3.%,19%,20% and 25. of total area respectively.

关键词： Debris flow Geographic information system Hazard Vulnerability Risk Rainfall threshold

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Dynamic Characteristic Analysis of HIV Mother to Child Transmission in China

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Biomedical and Environmental Sciences 2010年第5期23卷 402-408页

作者： JUN-JIE WANG KATHLEEN HEATHER REILLY HUA HAN ZHI-HANG PENG NING WANG national center for AIDS/STD Control and Prevention Chinese Center for Disease Control and PreventionBeijing 100050China Tulane University Health Sciences center School of Public Health and Tropical MedicineNew OrleansLAUSA national asic design {3. {4. Institute of AutomationChinese Academy of SciencesBeijing 100190China Department of Epidemiology and Biostatistics Nanjing Medical UniversityNanjing 210029China

Objective to explore dynamic characteristics of the HIV mother to child transmission （MTCT） epidemic in *** A deterministic dynamic transmission model was used to determine the effect of key parameters on the likely long-term trends of the HIV MTCT epidemic in *** 7.0 was used to develop the *** The number of the susceptibles （S）,the transmission rate （β）,and the screening proportion （α） of HIV positive pregnant women have the greatest impact on the HIV MTCT epidemic in *** growth of the MTCT epidemic in China could not be controlled only by decreasing the MTCT transmission *** prevalence of HIV positive women should be reduced and more pregnant women should be tested for *** Prevention of MTCT （PMTCT） should focus not only on the reduction of HIV transmission rates and incidences of HIV among women but also on the increase of HIV testing for pregnant *** most cost-effective PMTCT means for China should be investigated in future studies.

关键词： mother to child transmission dynamic model HIV China

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Web-Based Compilation of C-MEX S-Functions and Its Application in NCSLab

Web-Based Compilation of C-MEX S-Functions and Its Applicati...

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第三十届中国控制会议

作者： PANG Zhonghua~(1,2),LIU Guo-Ping~(3.4.,QIAO Yuliang~5.1.School of automation engineering,Qingdao Technological University,Qingdao 26603.,P.R.China 2.{3. of automation,chinese {5. of Sciences,beijing 100190,P.R.China 3.center for Control Theory and Guidance Technology,Harbin {3. of Technology,Harbin 15.001,P.R.China 4.Faculty of Advanced Technology,University of Glamorgan,Pontypridd CF3. 1DL,UK 5.HiRain Technologies,beijing 100101,P.R.China

This paper introduces a whole Web-based laboratory called NCSLab for the design and practical implementation of complex control systems,which adopts a three-tier architecture including Web browsers,server clusters and test *** blocksets,a basic blockset and a networked control blockset,are created to facilitate the configuration of control systems in a block-diagram-based way on a Web page called *** can design some simple or given control algorithms with these blocks based on *** order to enable users to design complex control systems based on the Web,which are required to add customized algorithms to WebConSim models,the functionality of Web-based compilation and calling of C-MEX S-Functions is *** experiments are given to illustrate the whole Web-based functionality of NCSLab.

关键词： Web-based laboratory Networked control blockset C-MEX S-Functions Web-based compilation

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Fast and Robust Control of Excitation Systems: A Finite-time Method

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Journal of Systems Science and Systems engineering 2001年第2期13卷 148-161页

作者： WANG Yu-zhen, CHENG Dai-zhan, HONG Yi-guang, QIN Hua-shuinstitute of Systems Science, academy of Mathematics and System Sciences,chinese academy of Sciences,{4. 100080, China institute of Systems Science Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

Using finite-time control approach, this paper proposes a new design method for nonlinear robust excitation control of a widely used 5.h-order model of synchronous generators. The finite-time excitation controller achieved here can improve the system′s behaviors in some aspects such as quick convergence and robustness for uncertainties. Simulations demonstrate that the finite-time excitation controller is more effective than some other excitation controllers.

关键词： finite-time control homogeneity excitation control robustness

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H_∞ Control of a 5.h- order Model of Synchronous Generators

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Journal of Systems Science and Systems engineering 2001年第1期13卷 50-56页

作者： WANG Yu zhen1, CHENG Dai zhan1, NING Wei21.institute of Systems Science, academy of Mathematics and System Sciences, chinese academy of Sciences,{4. 100080, China 2.Tai′an Teachers College, Tai′an 271000, China institute of Systems Science Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China Tai' an Teachers College Tai' an 271000 China

：This paper deals with H∞ control of a 5.h-order model of synchronous generators. First,byusing the method of exact linearization, we transform the 5.h-order model into a linear one. Then we assignthe pole of the linearized model in the open left half plane. Finally, we apply the design method of linear H∞control to get a state feedback controller.

关键词： 5.h-order model H∞ control exact linearization pole assignment

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Identification of QTLs for grain size and characterization of the beneficial alleles of grain size genes in large grain rice variety BL129

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Journal of Integrative Agriculture 2016年第1期15卷 1-9页

作者： GAO Xua ZHU Xu-dong FANG Na DUAN Peng-gen WU Ying-bao LUO Yue-hua LI Yun-hai Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources/Agricultural College Hainan UniversityHaikou 570228P.R.China State Key Laboratory of Rice Biology China National Rice Research InstituteChinese Academy of Agricultural SciencesHangzhou 310006P.R.China State Key Laboratory of Plant Cell and Chromosome engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101P.R.China

Grain size is one of the most important agronomic components of grain yield. Grain length, width and thickness are controlled by multiple quantitative trait loci （QTLs）. To understand genetic basis of large grain shape and explore the beneficial alleles for grain size improvement, we perform QTL analysis using an F2 population derived from a cross between the japonica variety Beilu 129 （BL129, wide and thick grain） and the elite indica variety Huazhan （HZ, narrow and long grain）. A total number of eight major QTLs are detected on three different chromosomes. QTLs for grain width （qGW）, grain thickness （qGT）, brown grain width （qBGW）, and brown grain thickness （qBGT） explained 77.67, 3..24. 89.63. and 3..4.% of total phenotypic variation, respectively. The large grain rice variety BL129 possesses the beneficial alleles of GW2 and qSW5. GW5. which have been known to control grain width and weight, indicating that the accumulation of the beneficial alleles causes large grain shape in BL129. Further results reveal that the rare gw2 allele from BL129 increases grain width, thickness and weight of the elite indica variety Huazhan, which is used as a parental line in hybrid rice breeding. Thus, our findings will help breeders to carry out molecular design breeding on rice grain size and shape.

关键词： rice quantitative trait grain size GW2 GW5

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基于场效应晶体管的太赫兹探测器中天线设计的一种有效方法（英文）

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红外与毫米波学报 2018年第4期37卷 389-392页

作者：张博文颜伟李兆峰白龙 Grzegorz Cywinski Ivan Yahniuk Krzesimir Szkudlarek Czeslaw Skierbiszewski Jacek Przybytek Dmytro B.But Dominique Coquillat Wojciech Knap 杨富华中国科学院半导体研究所半导体集成技术工程研究中心北京100083 中国科学院大学北京100049 中国科学院半导体研究所超晶格实验室北京100083 波兰科学院高压物理研究所波兰华沙PL01-142 先进材料与技术中心中央实验室波兰华沙PL02-822 蒙彼利埃大学与法国国家科学研究院查尔斯·库伦实验室法国蒙彼利埃UMR5221

在场效应晶体管太赫兹探测器中,合理的天线设计可以增强晶体管和太赫兹波之间的耦合效率,从而提高太赫兹探测器的响应度.提出一种基于晶体管栅极边缘沟道电场的仿真来设计平面天线的方法.这种方法尤其适用于太赫兹波段晶体管输入阻抗不... 详细信息

在场效应晶体管太赫兹探测器中,合理的天线设计可以增强晶体管和太赫兹波之间的耦合效率,从而提高太赫兹探测器的响应度.提出一种基于晶体管栅极边缘沟道电场的仿真来设计平面天线的方法.这种方法尤其适用于太赫兹波段晶体管输入阻抗不容易得到的情况.通过流片完成的基于氮化镓高电子迁移率晶体管的太赫兹探测器的响应度测试证实了这种方法的有效性.集成碟形天线和双偶极子天线的太赫兹探测器最大响应度分别在170.7 GHz(15.8.4.V/W)和124.3.GHz(104..2 V/W)频点处测得,这个测试结果接近基于晶体管栅极边缘沟道电场的仿真结果.

关键词：太赫兹探测器平面天线沟道电场场效应晶体管

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Fine Mapping QTLs Affecting Milk Production Traits on BTA6 in chinese Holstein with SNP Markers

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Journal of Integrative Agriculture 2013年第1期12卷 110-117页

作者： LIU Rui SUN Dong-xiao WANG Ya-chun YU Ying ZHANG Yi CHEN Hui-yong ZHANG Qin ZHANG Sheng-li ZHANG Yuan College of Animal Science and Technology/Key Laboratory of Animal Genetics and Breeding Ministry of Agriculture/National Engineering Laboratory of Animal Genetics/China Agricultural University Sichuan Animal Science academy

Our previous studies demonstrated that the region around markers BMS4.0 and BMS124. on BTA6 showed a linkage to 3.5.d milk yield and composition traits in the chinese Holstein population. We herein focused on such narrow region to fine map milk production QTLs with 15.SNPs across 25.Mb with each SNP in 1 Mb within most regions in a chinese Holstein population with daughter design. 1 4.9 Holstein cows and 11 sires were genotyped for such SNPs by using TaqMan probe and RFLP assays. Multipoint linkage analysis across family revealed a QTL affecting milk yield between PPARGC1A C4.75. and SLC3.A2 T1713.. Meanwhile, within family analysis found three milk yield QTLs （two in CR T60984.3.G-CEP13.0}C5.1T and one in PDLIM5.A106C-OPN T3.07, a fat yield QTLin UGDH T1670C-CR T60984.3.G region, and two protein yield QTLs in TBC1D1 G5.1C-UGDH T1670C and PPARGC1A C4.75.-SLC3.A2 T1713., respectively. Associations between aforementioned significant SNP markers and milk production traits were further implemented. We found significant associations of PPARGC1A C4.75., SLC3.A2 T1713. with milk yield （P0.05. P0.01, P0.01）, UGDH T1670C, and CR T60984.3.G with fat yield （P0.01, P0.01）, and PPARGC1A C4.75., SLC3.A2 T1713., UGDH T1670C and OPN T3.07 with protein yield （P0.01, P0.01, P0.01, P0.01）. Our findings implied that QTLs affecting milk production traits on BTA6 were pleictropism or multigenic effect and PPARGC1A and OPN may be the causal mutations behind milk production QTLs on BTA6 in the chinese Holstein population.

关键词： fine mapping milk production trait SNP BTA6 chinese Holstein

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