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Response of remotely sensed Normalized Difference Water Deviation Index to the 2006 Drought of eastern Sichuan Basin

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science China Earth sciences 2008年第5期51卷 748-758页

作者： ZHANG WenJiang1, LU QiFeng2, GAO ZhiQiang3 & PENG Jian4.1 School of Water Resource and Hydropower, Sichuan university, Chengdu 610065, China 2 National Satellite Meteorological center, China Meteorological Administration, Beijing 100081, China 3 Institute of Geographic sciences and Natural Resources research, Chinese Academy of sciences, Beijing 100101, China 4.School of Environmental sciences, Peking university, Beijing 100871, China 1. School of Water Resource and Hydropower Sichuan University Chengdu 610065 China 2. National Statellite Meteorological center China Meteorological Administration Beijing 100081 China 3. Institute of Geographic sciences and Natural Resources research Chinese Academy of Sciences Beijing 100101 China 4. School of Environmental sciences Peking University Beijing 100871 China

One of the most serious droughts in last century occurred in eastern Sichuan Basin in the summer of 2006 (hereinafter called the Drought). The response of Moderate Resolution imaging Spectroradiometer (MODIS, boarding on NASA satellites of Terra and Aqua) to the Drought was analyzed in order to reach one practicable monitoring solution for regional soil moisture. Temporal process and spatial extension of the Drought were firstly estimated with ground meteorological and hydrological observations. Then, for the whole region of Sichuan and Chongqing, the remotely sensed Normalized Difference Water In- dex (NDWI) for the summers of 2001―2006 were calculated based on 8-day composite MODIS products, which were further used to construct a new water index (Normalized Difference Water Deviation Index, NDWDI) to examine the sensitivity of remote sensing in the Drought. The study showed that the NDWDI is more sensitive to regional drought than other absolute-soil-moisture-based indices. With the new index, the study extracted the spatial-temporal characteristics of the 2006 Drought, and explored its developing and withdrawing processes, which agreed with related statistics. Compared with ground method of drought observation, the NDWDI-based remote sensing solution of this paper is more pref- erable and practicable in that the local soil properties of water consumption and supply are implicitly taken into account, and the spatial representativity limit of ground observation is circumvented to a degree as satellite remotely senses the earth surface in a way of two-dimensional pixel matrix. So, the NDWDI-based method can be used to monitor regional soil water stress situation more practically and efficiently.

关键词： Sichuan Basin drought Normalized Difference Water Deviation Index response of remote sensing regional scale

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WHAT DOES CHAOS HAVE TO DO WITH SYSTEMS AND CONTROL ENGINEERING?

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Journal of Systems science & Complexity 2001年第1期14卷 31-39页

作者： CHEN Guanrong (Department of Electrical and Computer Engineering, university of Houston, Houston, texas 77204. usa Department of Electronic Engineering, City university of Hong Kong, Kowloon, Hong Kong SAR, China) university of Houston 美国 77204

Chaos as a very special type of complex dynamical behaviors has been studied for about four decades. Yet the traditional trend of analyzing and understanding chaos has evolved to controlling and utilizing chaos today. research in the field of chaos modeling, control, and synchronization includes not only ordering chaos, which means to weaken or completely suppress chaos when it is harmful, but also chaotification, which refers to enhancing existing Chaos or creating chaos purposely when it is useful, by any means of control technology. This article offers a brief overview about the potential impact of controlled chaos on beneficial applications in science and engineering, and introduces some recent progress in chaotification via feedback control methods.

关键词： Chaos chaos control chaotification complexity feedback.

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Diaphragm Effect on Detonation Wave Transmission from Propane/oxygen to Propane/air

Diaphragm Effect on Detonation Wave Transmission from Propan...

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The 4.h Across-strait Workshop on Shock Wave/Vortex Interaction

作者： J.M.Li~(1*),K.C.Chang~1,K.M.Chung~2,F.K.Lu~3 1 Dept.of Aeronautics and Astronautics,National Cheng Kung university,Tainan,Taiwan 2 Aerospace science and Technology research center,National Cheng Kung university, Tainan,Taiwan 3 Aerodynamics research center,Mechanical and Aerospace Engineering Department, university of texas at Arlington,texas,76019,usa

Transmission of detonation waves from one mixture to another has been studied since 1950s. This issue is of interest in fundamental studies of detonation waves and its application in pulse detonation engines(PDE).Most previous studies used a thin diaphragm to separate the two *** diaphragm may have an influence on wave transmission,e.g.,causing a time delay and reflected waves due to the diaphragm rupture,hence destroying the cellular structures of

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Remarks on large eddy simulation

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Communications in Nonlinear science and Numerical Simulation 2000年第3期5卷 85-90页

作者： G. Q. CHEN L. TAO and K. R. RAJAGOPAL(Centre for Environmental sciences / State Key Laboratory for Turbulence Researsh, Pekinguniversity, Beijing 100871, e-ma1l: gqchen@ns.nlspku.ac.cnDepartment of Mechanical Engineertng, texas A&M university, College Station, texas 7784.-3123, usa) Centre for Environmental sciences / State Key Laboratory for Turbulence research Peking University Beijing 100871 China Department of Mechanical Engineering Texas A&M University College Station Texas 77843-3123 USA

For large eddy simulation of turbulent flows. some analysis and general remarks on the filtering operation and modeling under small filtering length scales are presented.

关键词： large eddy simulation turbulence modeling

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Deformation-induced α_2/γ Interfaces in a Hot-deformed Ti-4.Al-10Nb Alloy

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Journal of Materials science & Technology 1998年第2期14卷 132-138页

作者： Jinguo WANG Lichun ZHANG and Guoliang CHEN (State Key Lab. for Advanced Metals and Materials, university of science and Technology Beijing, Beijing 100083, China )Henqiang YE(Lab. of Atomic imaging of Solids, Institute of Metal research, Chinese Academy State Key Lab. for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China Lab. of Atomic imaging of Solids Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

The structure change of α2/γ interface in a Ti-4.Al-10Nb alloy induced by hot deformation was investigated by conventional and high-resolution transmission eIectron microscopy. Two types of hot deformation induced special α2/γ intedeces, coherent intedeces with high density of ledges and semi-coherent α2/γ intedeces were found to be due to the absorption of mobile dislocations into the α2/γ inteface. For the misoriented semi-coherent α2/γ interfaces, the densities of dislocation ledges increase with the misoriented angle between (111)γ and (0001)α2 planes, and 1/3[111] Frank partial dislocations were involved in the dislocation ledges. Formation mechanism of these deformation-induced α2/γ interfaces was discussed to be related to the role of α2/γ interface5 adjusting the deformation as a dislocation sink absorbing the slipping dislocations in the γ phase

关键词： Al Ti Interfaces in a Hot-deformed Ti-4.Al-10Nb Alloy Deformation-induced

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杏仁核在疼痛及疼痛引起的情感和认知障碍中的作用

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山东大学学报（理学版） 2011年第10期46卷 171-177页

作者：姬广臣美国德州大学医学部神经科学和细胞生物学系德克萨斯州加尔维斯顿77555

疼痛是一种不愉快的感觉和情绪体验,伴随有强烈的负性情绪(如厌恶、恐惧、焦虑等)。杏仁核作为边缘系统的皮质下中枢,在情绪反应中具有重要作用。我们的研究表明杏仁核在疼痛调制,特别是疼痛情绪反应中起关键作用。本文综述了杏仁核在... 详细信息

疼痛是一种不愉快的感觉和情绪体验,伴随有强烈的负性情绪(如厌恶、恐惧、焦虑等)。杏仁核作为边缘系统的皮质下中枢,在情绪反应中具有重要作用。我们的研究表明杏仁核在疼痛调制,特别是疼痛情绪反应中起关键作用。本文综述了杏仁核在疼痛及疼痛引起的焦虑行为和认知功能障碍中的作用。

关键词：杏仁核疼痛焦虑认知障碍

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Nanotechnology for bioseparations

Nanotechnology for bioseparations

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30th International Symposium on Capillary Chromatography、4.h GC×GC Symposium、16th National Symposium and Exhibition on Chromatography,i.e. 1st Dalian International Symposium and Exhibition on Chromatography

作者： Baba Y.~(1-5 *) 1.Department of Applied Chemistry Graduate School of Engineering Nagoya university 2.MEXT Innovative research center for Preventive Medical Engineering Nagoya university 3.Plasma Nanotechnology research center Nagoya university 4.health Technology research center National Institute of Advanced Industrial science and Technology (AlST) 5.Institute for Molecular science National Institute for Natural sciences

＜正＞This lecture will describe the recent development of nanobiotechnologies based on the nanofabrication, molecular nanotechnoiogy,and nanomaterials for bioanalysis and biomedical *** technologies allow us to develop novel methods to analyze several biomolecules,including DNA,RNA,protein,peptide, polysaccharide,and *** of nano-pillar,which is 200 nm wide and 4.00 nm tall,is successfully applicable to fast separation of DNA within 10-25 ***-ball,fabricated by molecular nanotechnology,of which diameter is 50 nm,is developed and successfully applied for fast separation of DNA fragments from 100 bp to 15 *** cellulose,which is 50 nm diameter biofiber,is found to be useful high sensitive detection of biomolecule based on the optical confined effect as well as fast analysis of *** nano-biodevice is extremely useful for fast separation of protein samples from several kDa to 200 kDa within 15 seconds. Utilizing this technique,complex protein mixture extracted from human T cell line,lymphoblastic Jurkat cells, were separated within 15s with high *** methods we have taken appear suitable for biomedical and clinical applications,including SNPs analysis,mutation analysis,haplotyping,DNA diagnosis,protein expression analysis,immunoassay,protein disease marker detection,point-of-care *** methods are also applicable to molecular imaging of cancer cell and possible photodynamic therapy of cancer.

关键词： Nanotechnoiogy Biodevice Protein DNA Cell

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Microstructural Features of Garnets in Jadeite Quartzite from Dabie Mountains, China

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Journal of Earth science 2000年第3期19卷 158-161页

作者： Wu Xiuling Mou Tao Han Yujing Test center, China university of Geosciences, Wuhan 4.0074. China Li Douxing Laboratory of Atomic imaging of Solid, Institute of Metal {4., Academia Sinica, Shenyang 110015, China

Garnet is an important rock forming mineral of high pressure and ultrahigh pressure metamorphic rocks. Its popular isomorphism complicates its chemical composition and crystal structure. The selected area electron diffraction (SAED) and the high resolution electron microscopy (HREM) are used in this work to study the microstructures and ultrastructures of garnets in the jadeite quartzite from Dabie Mountains, China. The microstructures of the garnet occur mainly as free dislocations, dislocation walls, stacking faults, dislocation networks and sub grain boundaries. The dislocation density is ρ=n ×10 8/cm 2 ( n =1.7—7.5) and the deformation mechanism is the dislocation glide and dynamic recovery. The superstructures of the garnet crystal revealed by HREM occur mainly as dislocations, faults, domain structures and lattice deformations, indicating the strong stress during the formation of the jadeite quartzite.

关键词： jadeite quartzite garnet microstructure HREM.

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Detection of bursts in neuronal spike trains by the mean inter-spike interval method

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Progress in Natural science:Materials International 2009年第2期19卷 229-235页

作者： Lin Chena,b,Yong Deng c,Weihua Luo a,Zhen Wang a,Shaoqun Zenga,a Hubei Bioinformatics and Molecular imaging Key Laboratory,Huazhong university of science and Technology,Wuhan 4.0074.China b College of Mechanical Engineering,Guangxi university,Nanning,530004.China c College of Optoelectronic science of Engineering,Huazhong university of science and Technology,Wuhan 4.0074.China [a]Hubei Bioinformatics and Molecular imaging Key Laboratory Huazhong University of Science and Technology Wuhan 430074 China [b]College of Mechanical Engineering Guangxi University Nanning 530004 China [c]College of Optoelectronic Science of Engineering Huazhong University of Science and Technology Wuhan 430074 China

Bursts are electrical spikes firing with a high frequency,which are the most important property in synaptic plasticity and information processing in the central nervous system. However,bursts are difficult to identify because bursting activities or patterns vary with phys-iological conditions or external stimuli. In this paper,a simple method automatically to detect bursts in spike trains is described. This method auto-adaptively sets a parameter (mean inter-spike interval) according to intrinsic properties of the detected burst spike trains,without any arbitrary choices or any operator judgment. When the mean value of several successive inter-spike intervals is not larger than the parameter,a burst is identified. By this method,bursts can be automatically extracted from different bursting patterns of cultured neurons on multi-electrode arrays,as accurately as by visual inspection. Furthermore,significant changes of burst variables caused by electrical stimulus have been found in spontaneous activity of neuronal network. These suggest that the mean inter-spike interval method is robust for detecting changes in burst patterns and characteristics induced by environmental alterations.

关键词： Inter-spike interval Bursts Spike trains Multi-electrode arrays

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Use of Linear Spectral Mixture Model to Estimate Rice Planted Area Based on MODIS Data

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Rice science 2008年第2期15卷 131-136页

作者： WANG Lei Satoshi UCHID center for science and Technology Information China National Rice Research Institute Hangzhou 310006 China Development research Division Japan International Research Center for Agricultural Sciences Tsukuba Ibaraki 305-8686 Japan

MODIS （Moderate Resolution imaging Spectroradiometer） is a key instrument aboard the Terra （EOS AM） and Aqua （EOS PM） satellites. Linear spectral mixture models are applied to MOIDS data for the sub-pixel classification of land covers. Shaoxing county of Zhejiang Province in China was chosen to be the study site and early rice was selected as the study crop. The derived proportions of land covers from MODIS pixel using linear spectral mixture models were compared with unsupervised classification derived from TM data acquired on the same day, which implies that MODIS data could be used as satellite data source for rice cultivation area estimation, possibly rice growth monitoring and yield forecasting on the regional scale.

关键词： rice planted area Moderate Resolution imaging Spectroradiometer Thematic Mapper data mixed pixel linear spectral mixture model

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