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Estimating surface evapotranspiration using combined MODIS and CBERS-02 data

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Science China(Technological Sciences) 2005年第S2期48卷 145-160页

作者： XIN Xiaozhou1,2, LIU Qinhuo1, TANG Yong1,3, TIAN Guoliang1, GU Xingfa1, LI Xiaowen1,2, ZHENG Hongsheng4.& chen Jiayi4.1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Sciences, beijing 100101, China 2. Research Center for Remote Sensing and GIS, department of Geography, beijing {4. university, beijing 100875, China 3. Graduate university of Chinese Academy of Sciences, beijing 100039, China 4. department of Atmospheric Physics, Peking university, beijing 100871, China State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China Research Center for Remote Sensing and GIS Department of Geography Beijing Normal University Beijing 100875 China Graduate university Chinese Academy of Sciences Beijing 100039 China department of Atmospheric Physics Peking University Beijing 100871 China

Spatial scale error is one of the most serious problems in the estimates of land surface heat fluxes of sensible and latent from satellite-borne data such as MODIS 1km resolution reflectance and emissive data. One of the feasible and economic ways to decrease the spatial scale error is to use high resolution land use class data together with the MODIS data. CBERS-02 data were used to produce land use class of Baiyangdian area, Hebei Province, China in the autumn of 2004. The area ratio of each class in MODIS pixel was calculated, and used to derive the heat fluxes of the mixed pixel. The results showed that the estimated heat fluxes of soil, sensible and latent have been changed remarkably after using the high resolution land class data. It could be concluded from the comparison between simulated and ground-measured fluxes as well as the theoretical analysis that high resolution land class data are useful to diminishing the scale error of heat fluxes estimated from low resolution satellite data.

关键词： surface evapotranspiration spatial scale error MODIS CBERS land class.

△-tame quasi-hereditary algebras

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Science China mathematics 2007年第2期50卷 240-252页

作者： Yun-ge XU & Ying-bo ZHANG Faculty of mathematics and Computer Science, Hubei university, Wuhan 4.0062, China School of mathematics Sciences, beijing {4. university, beijing 100875, China Faculty of mathematics and Computer Science Hubei University Wuhan China School of mathematics Sciences Beijing Normal University Beijing China

Let (K, M,H) be an upper triangular bimodule problem. Briistle and Hille showed that the opposite algebra A of the endomorphism algebra of a projective generator P of the matrices category of (K., M, H) is quasi-hereditary, and there is an equivalence between the category of△-good modules of A and Mat(K, M). In this note, based on the tame theorem for bimodule problems, we show that if the algebra A associated with an upper triangular bimodule problem is of△-tame representation type, then the category F(△) has the homogeneous property, i.e. almost all modules in F(△) are isomorphic to their Auslander-Reiten translations. Moreover, if (K, M,H)is an upper triangular bipartite bimodule problem, then A is of△-tame representation type if and only if F(△) is homogeneous.

关键词： bimodule problem quasi-hereditary algebra △-tameness homogeneity.

OSCILLATORY SINGULAR INTEGRALS WITH VARIABLE ROUGH KERNEL, Ⅱ

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Analysis in Theory and Applications 2003年第1期19卷 1-13页

作者： Tang Lin and Yang Dachun (beijing normal university, China) Tang Lin and Yang Dachun department of {4. beijing normal university beijing 100875 P. R. China beijing normal university Beijing China department of mathematics Beijing Normal University Beijing 100875 China

Let n≥2. In this paper, the author establishes the L2 (Rx)-boundedness of some oscillatory singular integrals with variable rough kernels by means of some estimates on hyper geometric functions and confluent hyper ge... 详细信息

关键词： oscillatory singular integral variable rough kernel

Boundary Nevanlinna-pick Interpolation for Meromorphic Functions

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Acta Mathematicae Applicatae Sinica 2002年第2期18卷 255-262页

作者： Gong-ning chen, Li-xin Jiadepartment of mathematics, beijing {4. university, beijing 100875, China Electronic and Technology Institute, Zhengzhou 4.0004. China department of mathematics Beijing Normal University Beijing China Electronic and Technology Institute Zhengzhou China

Versions of the multiple Nevanlinna-Pick interpolation problem in the class N involving both interior and boundary data are investigated. This leads to solvability criteria for the indicated problems and description o... 详细信息

关键词： Nevanlinna-pick interpolation generalized Pick matrix Hankel vector power moment problem minimally positive Hankel matrix

Effects of chlorogenic acid, an active compound activating calcineurin, purified from Flos Lonicerae on macrophage

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Acta Pharmacologica Sinica 2004年第12期25卷 119-123页

作者： He-zhen WU, Jing LUO, Yan-xia YIN, Qun WEI2 department of Biochemistry and Molecular Biology, beijing normal university, beijing 100875, China department of Biochemistry and Molecular Biology Beijing Normal University 北京 100875

AIM: To investigate the activation of chlorogenic acid (CHA) purified from Flos Lonicerae to calcineurin and its effects on macrophage functions in vivo and in vitro. METHODS: According to the screening results that Flos Lonicerae could activate calcineurin, the active component which could activate calcineurin was purified from Flos Lonicerae by column chromatography on silica gel and identified as CHA. The activation of CHA on calcineurin had been validated with both p-NPP and P-labeled RII peptide as the substrates. The clearance of charcoal particles in 32 normal mice and the cytotoxicity of U937 to MCF-7 were used together to determine the effects of CHA on macrophage functions. RESULTS: CHA could activate calcineurin, and the concentration of CHA on maximal activating calcineurin was 282.5 μmol/L. CHA administration (10 mg/kg, ig×7 d) significantly enhanced the mac- rophage functions in normal mice. CHA (70.6, 14..2, and 282.5 μmol/L) obviously increased the cytotoxicity of U937 to MCF-7. CONCLUSION: CHA could activate calcineurin and enhance the macrophage functions in vivo and in vitro, and its functions in vivo may be realized via the signal pathways of calcineurin.

关键词： calcineurin macrophage chlorogenic acid Flos Lonicerae

THE PATH UNIQUENESS OF THE SOLUTION OF THE TWO-PARAMETER POISSON TYPE STOCHASTIC DIFFERENTIAL EQUATION

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Chinese Science Bulletin 1989年第19期34卷 1590-1594页

作者：陈雄 department of mathematics Beijing Normal University Given (Ω (?) P ) let ∧be a nonnegative additional set function on R_+~2 and have density function λabout Lebesgue measure l. For simplicity in this report we always suppose that there exists a constant M>0 such that d∧/dl=λ≤M.

Given (Ω, (?), P ), let ∧ be a nonnegative additional set function on R_+~2 and have density function λ about Lebesgue measure l. For simplicity, in this report, we always suppose that there exists a constant M>0 s... 详细信息

关键词： two-parameter Poisson process SDE strong solution uniqueness

Synthesis and Structural Characterization of Adduct [La(NO_3)_3·4._2O]·2(BQEB)

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Chinese Chemical Letters 1998年第8期9卷 783-784页

作者： Wen Xiang ZHU Bao Di GOU Yong An ZHANG Yan LI Xue An chen(department of Chemistry, beijing normal {4., beijing, 100875)(Institute of Chemistry, Academia Sinica, beijing 100080) department of Chemistry Beijing Normal University Beijing 100875 China Institute of Chemistry Academia Sinica Beijing 100080 Taiwan

A new podand compound o-Bis(8'-quinolyloxy) ethylenoxyl benzene (BQEB) was prepared. A lanthanum adduct with BQEB was spothesized and its structure was characterized by X-ray crystal analysis. The La(III) is ten-coordinated to the three No3- and four H2O. Two podand molecules are linked to the coordination core by four hydrogen bonds. The crystal is packed in the manner of .LLMLLMLL.

关键词： podand lanthanum adduct crystal structure

Enhanced Electron Transfer for Hemoglobin in 2C_(12)N^+PVS-Composite Films Modified on Pyrolytic Graphite Electrodes

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Chinese Chemical Letters 2000年第8期11卷 719-720页

作者： Yu Jiao HU, Ying Lin ZHOU, Yong Huai ZENG, Nai Fei HU (department of Chemistry, beijing normal university, beijing 100875) department of Chemistry Beijing Normal University Beijing 100875 China

Stable thin films made from polyionic complex 2C12N+PVS- with incorporated Hb on PG electrodes were characterized by electrochemistry. The electron transfer between Hb and PG electrodes was greatly facilitated in microenvironment of 2C12N+PVS- films. The Hb-2C12N+PVS-films could be used to catalytically reduce trichloroacetic acid.

关键词： Hemoglobin poly(vinyl sulfate) didodecyldimethylammonium surfactant-polymer composite films electrochemistry electrocatalysis.

THEORETICAL　STUDIES　ON　THE　CYCLOADDITION　REACTION　OF　FLUOROKETENE　WITH　ETHYLIDENIMINE

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Chinese Chemical Letters 1995年第4期6卷 311-314页

作者： Zhen Feng XU De Cai FANG Xiao Yuan FU(department of Chemistry, beijing normal university, beijing, 100875) beijing normal Univ Dept Chem Beijing 100875 Peoples R China

The stereospecific rule of the cycloaddition reaction of ketene and imine has been treated theoretically in this Paper. By comparing the barrier heights, it can be seen that for trans imine the reaction will give cis ... 详细信息

关键词：颍