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Effects of hot pressing on electric performances of Bi_(0.5)Sb_(1.5)Te_(3)

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Rare Metals 2006年第z1期25卷 320-323页

作者： XIAO Bo CHEN Hui WU Borong ZHU Lei liU Mingyi JIAN Xuyu li lin Institute for Energy Materials and Technology General Research Institute for Non-Ferrous MetalsBeijing 100088China Tianjin Institute of Power Sources Tianjin 300381China

The effects of hot pressing on electric performance and mechanical strength of Bi_(0.5)Sb_(1.5)Te_(3) thermoelectric material prepared through vacuum melting and milling were *** phase constituent and microstructure were analyzed by X-ray Diffraction and cold field emission Scanning Electric *** of the material on microstructure and electric performances are *** the rise of hot pressing temperature(from 300-500℃)and pressure(30-70 MPa),electric conductivity and power factor are ***,Bi_(0.5)Sb_(1.5)Te_(3) material can gain ideal thermoelectric performances and increased mechanical strength by hot pressing.

关键词： thermoelectric material hot pressing power factor electric conductivity

Different-Periodic Travelling Wave Solutions for Nonlinear Equations

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Communications in Theoretical Physics 2004年第4期41卷 481-486页

作者： YE li-Jun~1 lin Ji~(1,2)1 Department of Physics,Zhejiang Normal University,Jinhua 321004,China2 Physics Department,Shanghai Jiao Tong University,Shanghai 200030,China Physics Department Shanghai Jiao Tong University Shanghai 200030 China

Using Jacobi elliptic function linear superposition approach for the(1+1)-dimensional Caudrey-Dodd-Gibbon-Sawada-Kotera(CDGSK)equation and the(2+1)-dimensional Nizhnik-Novikov-Veselov(NNV)equation,many new periodic travelling wave solutions with different periods and velocities are obtained based on the knownperiodic *** procedure is crucially dependent on a sequence of cyclic identities involving Jacobi ellipticfunctions sn(ξ,m),cn(ξ,m),and dn(ξ,m).

关键词： linear superposition nonlinear equation travelling wave solution

A genome-wide survey of maize lipid-related genes: candidate genes mining,digital gene expression profiling and colocation with QTL for maize kernel oil

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Science China(life Sciences) 2010年第6期53卷 690-700页

作者： li lin1,li Hui1,li JiYing1,XU ShuTu1,YANG XiaoHong1,li JianSheng1 & YAN JianBing1,2 1National Maize Improvement Centre of China,China Agricultural University,Beijing 100193,China 2International Maize and Wheat Improvement Centre (CIMMYT),Apdo.Postal 6-641,06600 Mexico,D.F.,Mexico 1. National Maize Improvement Centre of China China Agricultural University Beijing 100193 China2. International Maize and Wheat Improvement Centre (CIMMYT) Apdo. Postal 6-641 06600 Mexico D.F. Mexico

lipids play an important role in plants due to their abundance and their extensive participation in many metabolic *** involved in lipid metabolism have been extensively studied in Arabidopsis and other plant *** this study,a total of 1003 maize lipid-related genes were cloned and annotated,including 42 genes with experimental validation,732 genes with full-length cDNA and protein sequences in public databases and 229 newly cloned ***-seven maize lipid-related genes with tissue-preferential expression were discovered by in silico gene expression profiling based on 1984483 maize Expressed Sequence Tags collected from 182 cDNA ***,70 QTL clusters for maize kernel oil were identified,covering 34.5% of the maize ***-nine (84%) QTL clusters co-located with at least one lipid-related gene,and the total number of these genes amounted to ***,thirteen genes with kernel-preferential expression profiles fell within QTL clusters for maize kernel oil *** the maize lipid-related genes identified here may provide good targets for maize kernel oil QTL cloning and thus help us to better understand the molecular mechanism of maize kernel oil accumulation.

关键词： lipid metabolism in silico gene cloning in silico gene expression profiling quantative trait locus(QTL) maize

A Preliminary Study of the Noninvasive Remote Control System for Rat Bio-Robot

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Journal of Bionic Engineering 2010年第4期7卷 375-381页

作者： Xitian Pi~(1,2),Shuangshuang li~1,lin Xu~1,Hongying liu~1,Shenshan Zhou~1,Kang Wei~1,Zhenyu Wang~1,Ziru Jia,Xiaolin Zheng~(1,2),Zhiyu Wen~2 1.Bioengineering College,Chongqing University,Chongqing 400030,P.R.China 2.Key Laboratories for National Defense Science and Technology of Innovative Micro-Nano Devices and System Technology,Chongqing University,Chongqing 400030,P.R.China [a] Bioengineering College Chongqing University Chongqing 400030 P. R. China [b] Key Laboratories for National Defense Science Technology of Innovative Micro-Nano Devices System Technology Chongqing University Chongqing 400030 P. R. China

A system is described here that can noninvasively control the navigation of freely behaving rat via ultrasonic,epidermaland LED photic stimulators on the *** system receives commands from a remote host computer to deliver specifiedelectrical stimulations to the hearing,pain and visual senses of the rat *** results demonstrate that the three stimuliwork in groups for the rat *** can control the rat to proceed and make right and left turns with great *** verified that the rat was able to reach a setting destination in the way of cable with the help of a person through theappropriate coordination of the three *** telemetry video camera mounted on the head of the rat also achieveddistant image acquisition and helped to adjust its navigation path over a distance of 300 *** a word,the non-invasive motioncontrol navigation system is a good,stable and reliable bio-robot.

关键词： rat navigation bio-robot ultrasonic stimulator epidermal stimulator LED photic stimulator

Comparison of Photochemical Reactions of m-Cresol in Aqueous Solution and in Ice

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Chemical Research in Chinese Universities 2012年第1期28卷 47-52页

作者： PENG Fei1, XUE Hong-hai1, TANG Xiao-jian1,2, KANG Chun-li1, li lin-lin1 and li Zhe1 1. Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, P. R. China 2. School of Municipal and Environmental Engineering, Jilin Institute of Architecture and Civil Engineering, Changchun 130118, P. R. China Jilin Univ Key Lab Groundwater Resources & Environm Minist Educ Changchun 130021 Peoples R China Jilin Inst Architecture & Civil Engn Sch Municipal & Environm Engn Changchun 130118 Peoples R China

We compared the photochemical reaction of m-cresol containing ·OH precursors such as H2O2, NO2 and NO3 in aqueous solution with those in ice. The results show that the conversion rate of m-cresol in aqueous solution was higher than that in ice. H2O2, NO2 and NO3 all accelerated the photoconversion of m-cresol in both aqueous solution and ice. The photochemical reactions of m-cresol obeys the first order kinetics equation. According to the photoproducts identified by GC-MS, we proposed that hydroxylation and nitration reactions occurred in both aqueous solution and ice. Coupling reaction was common in ice, however, in aqueous solution it was found only in UV system. Our results suggest that the photochemical reactions of m-cresol were different in aqueous solution and in ice.

关键词： m-Cresol Photochemistry Aqueous solution Ice Mechanism

Preparation and characterization of carbon nano-sheet powders

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Petroleum Science 2008年第1期5卷 79-82页

作者： Yang Wubao Zhao Zhen Fang Songhua Wang Yong Yang Size lin li School of Electromechanical Engineering China University of Petroleum Beijing 102249 China School of Chemical Science and Engineering China University of Petroleum Beijing 102249 China Institute of Physics Chinese Academy of Sciences Beijing 100080 China

Carbon nanosheet films were deposited on A1 substrates by using plasma assisted chemical vapor deposition （PACVD） technique. And after being peeled off from A1 substrates, carbon nanosheet powders （CNSPs） were obtained. In Raman spectrum of carbon film, there was a strong and broadened peak at about 1,580 cm^-1, indicating a carbon diamond-like film. Atomic force microscope image showed that the carbon diamond-like film had a grain size less than 100 nm, and its surface roughness Ra was 17.95 nm in an area of 5×5 μm^2. The CNSPs were irregular sheets with curly edges and a length of several micrometers to several hundreds of micrometers. The BET surface area of CNSPs was 6.66 m^2/g with no micro-pore present, which was confirmed by N2 adsorption-desorption characterization. In the adsorption testing, when the relative pressure p/po was higher than 0.3, the adsorption behavior did not follow the Langmuir equation. The addition of CNSPs to carbon black （catalyst support） could improve hydrodesulfurization performance of carbon supported Ni-W catalysts for diesel oil.

关键词： Plasma assisted chemical vapor deposition carbon nanosheet powder N2 adsorption/desorption hydrodesulfurization

Martensite Transformation and Its Control in DP,TRIP and TWIP Steels

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Journal of Iron and Steel Research International 2011年第S1期18卷 200-207页

作者： li lin 1,GAO Yi 2,SHI Wen 1,liU Ren-dong 2,HE Yan-lin 1,FU Ren-yu 1,ZHANG Mei 1,WANG Hua 1 (1.School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China 2.Ansteel Company,Anshan 114001 China Corresponding Author:School of Materials Science and Engineering,Shanghai University,P.O.Box 15,149 Yanchang Road,Shanghai 200072,China) Shanghai Univ Sch Mat Sci & Engn Shanghai 200072 Peoples R China Ansteel Co Anshan 114001 Peoples R China

Designing of alloy concept and process for DP,TRIP and TWIP steels stressing at martensite transformation are *** DP steel,austenite volume percent and its carbon content at different intercritical temperatures are calculated as well as the tensile strength of the steel,which meet well with the experimental *** condition for dissolution of carbide is discussed by experiments and predicted by kinetic *** sample TRIP steels are prepared and their concentration profiles are calculated showing different diffusion characteristics of *** also shows carbon enrichment is successful in this stage through the quick diffusion of carbon from ferrite to *** order to maintain the austenite stability or to prevent precipitation of cementite,minimum cooling rate from the intercritical zone to over aging stage is obtained through kinetic *** transformation is estimated,which indicates the carbon rerichment from ferrite of bainite structure to austenite in this stage is also *** HCP martensite transformation and the strain induced martensite transformation in TWIP steel is *** between transformation and mechanical properties in the steel is also mentioned.

关键词： martensite transformation DP TRIP and TWIP steels thermal HCP martensite transformation

Indoor imitation experimental study on driving factors of rainfall-runoff process

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Science China Earth Sciences 2005年第3期48卷 417-428页

作者： ZHANG Shifeng1, liU Changming 1, XIA Jun1, TAN Ge 1, li lin1, liU Caitang1, ZHOU Changqing 1 & GUO Lei2 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2. College of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072, China 1. Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences 100101 Beijing China 2. College of Water Resources and Hydropower Engineering Wuhan University 430072 Wuhan China

The driving actions of rainfall-runoff process can be attributed to two aspects. The first is the influence of precipitation process, and the second is that of the ground pad. The re- search results of 179 indoor experiments conducted to imitate rainfall-runoff process indicate that both precipitation duration and intensity play important roles in affecting confluence lag time, which is obviously inconsistent with the traditional hypotheses. The nonlinear relationship is of great significance to the confluence curve especially when the precipitation duration is less than the total confluence time or the precipitation intensity is small. Therefore it can be concluded that the unit hydrograph (UH) can be applied to rainfall-runoff process imitation in the humid areas in the south China region. However, the UH application should be strictly modified in accordance with precipitation conditions in the arid and semiarid region of north China where the precipitation duration is short and the intensity is unstable. It will be hard to get ideal imitation results if the UH is applied blindly without considering specific conditions in the north China region. This also explains the unsatisfactory imitation results caused by using various hydrological models in the north China region. When the precipitation duration is short, and the watershed has not reached total watershed concentration, the characteristics of confluence change greatly, which reflects the actual situation in the north China region. Therefore necessary nonlinear corrections should be made when UH is applied. If the duration is longer than the total confluence time and the balance between pondage and discharge is stricken, the imitation research results will be applicable to both rainfall-runoff relation with longer duration in the south China region and the basic theoreti- cal research on runoff generation and concentration. On conditions of adequate rainfall, peak discharge is in linear relationship with inten

关键词： rainfall-runoff, driving factors, indoor imitation, experiment.

STUDY ON METHODS OF LAND USE DYNAMIC MONITORING AT COUNTY LEVEL──Taking Dehui County, Jilin Province for Example

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Chinese Geographical Science 2001年第2期11卷 181-185页

作者： li lin-yi1, HUANG Fang2, liU Zhao-li1, WAN En-pu1 (1.Changchun Institute of Geography, the Chinese Academy of Sciences, Changchun 130021, P.R.China 2.Northeast Normal University, Changchun 130021,P.R.China) 中科院长春地理所吉林长春 130021 东北师范大学城市与环境科学学院吉林长春 130021

Remote sensing technique has played an important role in land use dynamic monitoring, but as for the land use dynamic monitoring at county level, traditional remote sensing methods such as satellite imagery visual interpretation and computer classification can not meet its demand for accuracy. The result of 1:10 000 land use investigation map has high accuracy, but this method can not be used to dynamically monitor the land use because of its big expenses, long period and difficulty in updating data. In this paper, the characteristics of physiognomy, climate and the status of land use in Dehui County are taken into consideration and a set of method, which takes use of 3S techniques and applies to Northeast China Plain, is come up with. When the land use type of a land parcel changed as a whole, the date updating can be make by changing its land type ID in the attribute table in a GIS. When the land use type of an irregular area changed, GPS receivers are used to position its border. This set of method is characteristic of high accuracy and low expenses. It gets the information of land use change timely and can be used to dynamically monitor the land use. .

关键词： land use at county level dynamic monitoring GPS attribute alternation in GIS