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On Reverses of the L_p-Busemann-Petty Centroid Inequality and Its Applications

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Wuhan university Journal of Natural Sciences 2010年第4期15卷 292-296页

作者： WANG Weidong1,2.1. department of mathematics, China Three Gorges {2., Yichang 443002. Hubei, China 2. department of mathematics, Hubei {2. for Nationalities, Enshi 445000, Hubei, China department of mathematics China Three Gorges University Yichang Hubei China department of mathematics Hubei University for Nationalities Enshi Hubei China

In this paper,the reverse forms of the L p-Busemann-Petty centroid inequality are shown. As the applications of the reverse forms,we obtain the reverse forms of the L p-centroid-affine inequality and an upper bound of... 详细信息

关键词： convex body reverse form L p-Busemann-Petty centroid inequality L p-centroid-affine inequality isotropic constant

Two New Cyclic Peptides from Psammosilene tunicoides

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Chinese Chemical Letters 1999年第12期10卷 0-0,0-0页

作者： Zhong Tao DING You Chu WANG Jun ZHOU Ning Hua TAN Hou Ming WU(1Laboratory of Phytochemisty, kunming institute of Botany, Academia Sinica, kunming 6502.4)(2.2. of Chemistry, yunnan university, kunming 650091)(3State Key Laboratory of Bio-Organic Laboratory of Phytochemisty Kunming Institute of Botany Academia Sinica department of Chemistry Yunnan University

From Psammosilene tunicoides W. C. Wu et C. Y Wu, two cyclic octapeptides (namedpsammosilenins A and B) were isolated. Their structures were determined as cyclo(-Pro1-phe1-Pro2.Phe2.Phe3-Ala-Pro3-Leu-) and cyclo(-Pro... 详细信息

关键词： Psammosilene tUnicoides Cmpophyllaceae cyclic peptide psammosilenins A,psammosilenins B.

Stability of Plane Wave Solutions for the Ginzburg-Landau-BBM Equations (II)

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Communications in Nonlinear Science and Numerical Simulation 1999年第1期4卷 68-71页

作者： Murong JIANG (department of mathematics,{2., kunming 650091, China) (Graduate School of China Academy of Engineering and Physics, P.O.Box 2.01, Beijing, China) E-mail. jiangmr@*** department of mathematics Yunnan University Kunming 650091 China Graduate School of China Academy of Engineering and Physics P.O.Box 2101 Beijing China

In part (I) of this paper, the stability of plane waves for the GinzburgLandau-BBM equations has been proved. Here, the perturbation decays are obtained by using the Fourier transformation and semigroup estimates.

关键词： decay estimates semigroup the Ginzburg-Landau-BBM equations

Molecular evolution of stress-response gene Leptin in high-altitude Chinese snub-nosed monkeys (Rhinopithecus genus)

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Chinese Science Bulletin 2010年第36期55卷 4132-4135页

作者： WANG XiaoPing1,2. JIN Wei1,2. YU Li1,2.& ZHANG YaPing1,2.1 Laboratory for Conservation and Utilization of Bio-resource, yunnan university, kunming 650091, China 2.State Key Laboratory of Genetic Resources and Evolution, {2. Institute of Zoology, Chinese Academy of Sciences, {2. 6502.3, China Laboratory for Conservation and Utilization of Bio-resource Yunnan University Kunming 650091 China State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming 650223 China

Chinese snub-nosed monkeys (genus Rhinopithecus, subfamily Colobinae), including R. bieti, R. brelichi and R. roxellana, are well-known as the non-human primates with the highest known altitudinal distribution. They represent an interesting model organism of adaptation to the extreme environmental stresses. However, no study at the molecular level has yet been reported for the high-altitude adaptation in Chinese snub-nosed monkeys. Leptin, as an adipocyte-derived hormone, is believed to play an important role in energy homeostasis in adaptation to high altitude environments. In the present study, we sequenced and compared leptin sequences of the Chinese snub-nosed monkeys (R. bieti and R. roxellana) with their lowland close relative R. avunculus and other Colobines. Unexpectedly, no amino acid changes were observed in the 7 Colobinae species examined, including the 2.Chinese snub-nosed monkeys, indicating no difference in the evolutionary pattern of the Leptin gene between high-altitude monkeys and their lowland counterparts. In contrast to a previous finding of adaptive evolution of Leptin gene in plateau pikas, our study suggests that this gene may not have an important role in high-altitude adaptation of Chinese snub-nosed monkeys. Other nuclear genes associated with energy metabolism, or mitochondrial genes, are most likely to be involved the molecular mechanism underlying adaptation of these monkeys to cold and hypoxia associated with the highland environment.

关键词： Leptin基因金丝猴属瘦素基因压力反应分子进化高空鼻极端环境

Singular Integral Equations with Cosecant Kernel in Solutions with Singularities of High Order

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Wuhan university Journal of Natural Sciences 2005年第2期10卷 339-343页

作者： HAN Hui-li 1,2.,DU Jin-yuan 1,3 1. School of mathematics and Statistics, Wuhan university, Wuhan 430072. Hubei, China 2. School of mathematics and Computer, Ningxia university, Yinchuan 75002., Ningxia, China 3. department of mathematics, Hubei Institute for Nationalities, Enshi 445000, Hubei, China School of mathematics and Statistics Wuhan University Wuhan Hubei China School of mathematics and Computer Ningxia University Yinchuan Ningxia China department of Mathematies Hubei Institute for Nationalities Enshi Hubei China

We have discussed and solved the boundary value problem with period 2.π and the singular integral equation with kernel csc t-tv/a in solution having singularities of high order, where the smooth contour of integratio... 详细信息

关键词： boundary value problem singular integral equation the singularities of high order

A New Cyclopeptide from Polycarpon prostratum

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Chinese Chemical Letters 2000年第7期11卷 593-594页

作者： Zhong Tao DING Jun ZHOU Yong Xian CHENG Ning Hua TAN(Laboratory of Phytochemistry kunming Institute of Botany, Academia Sinica, kunming 6502.4{2. of Chemistry, yunnan university, kunming 650091) Laboratory of Phytochemistry Kunming Institute of Botany Academia Sinica department of Chemistry Yunnan University

A new cyclic peptide named polycarponin A, was isolated from the whole plants of Polycarpon prostratum. Its structure was determined by detailed spectroscopic analysis.

关键词： Polycarpon prostratum Caryophyllaceae cyclopeptide polycarponin A

The onset and advance of the Asian summer monsoon

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Science Bulletin 2006年第1期51卷 80-88页

作者： Lü Junmei1,2.4, ZHANG Qingyun1, TAO Shiyan1 & JU Jianhua3 1. State Key Laboratory of Numerical Modeling for Atmospheric Sci- ences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 10002., China 2. department of Atmospheric Sciences, yunnan university,{2., China 3. China Meteorological Administration Training Centre, Beijing 100081, China 4. Graduate School of Chinese Academy of Sciences, Beijing 100039, China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China department of Atmospheric Sciences Yunnan University Kunming 650091 China Graduate School of Chinese Academy of Sciences Beijing 100039 China China Meteorological Administration Training Centre Beijing 100081 China

Based on the daily outgoing longwave radiation (OLR) data from National Oceanic and At- mospheric Administration (NOAA) satellites, the Cli- mate Prediction Center’s merged analysis of pre- cipitation (CMAP) data and the National Centers for Environmental Prediction/National Center for At- mospheric Research (NCEP/NCAR) reanalysis dataset, the mean intraseasonal variability of the Asian summer monsoon (ASM) is investigated by using power spectrum analysis, band-pass filter, and diagnostic analyses. The processes of the onset and advance of monsoon over the southern part of Indo- china Peninsula, the east coast of Bay of Bengal, the South China Sea and the Indian subcontinent are explored. It is found that there is an abrupt change in OLR, precipitation and zonal wind during the onset and advance of the ASM. It is also indicated that the southern part of Indochina Peninsula and the adja- cent Andaman Sea is the region where the earliest onset of the ASM occurs in the 2.d pentad of May.

关键词： Asian summer monsoon intraseasonal variability onset advance.

Effects of Ca substitution and surface treatment on electrochemical performances of Ml_(1.0-x) Ca_xNi_(4.0) Co_(0.6) Al_(0.4) hydrogen storage alloy electrodes

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中国有色金属学会会刊：英文版 1999年第3期9卷 487-492页

作者： Chen Weixiang(陈卫祥) 1, Qi Jianqin(祁建琴) 1, Chen Changpin(陈长聘) 2.1. department of Physics 2. department of Materials Science and Engineering, Zhejiang {2., Hangzhou 31002., P. R. China 浙江大学物理系浙江杭州浙江大学材料科学与工程系浙江杭州

The influences of Ca substitution for Ml and surface treatment on electrochemical performances of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 hydrogen storage alloy electrode were investigated. Ca substitution with x 2.for Ml could improve its discharge capacity, but Ca substitution with x >0.2.could decrease the capacity. It was also found that Ca substitution deteriorates the electrocatalytic activity, high rate dischargeability and cycling durability of the alloy electrode. In order to improve these properties of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 alloy electrode, the alloy was treated in 6 mol/L KOH+0.02.mol/L KBH 4 solution. The results showed that the surface treatment improves the electrochemical performances such as the electrocatalytic activity, high rate dischargeability and cycling durability of the alloy electrode. :The influences of Ca substitution for Ml and surface treatment on electrochemical performances of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 hydrogen storage alloy electrode were investigated. Ca substitution with x 2.for Ml could improve its discharge capacity, but Ca substitution with x >0.2.could decrease the capacity. It was also found that Ca substitution deteriorates the electrocatalytic activity, high rate dischargeability and cycling durability of the alloy electrode. In order to improve these properties of Ml 1.0- x Ca x Ni 4.0 Co 0.6 Al 0.4 alloy electrode, the alloy was treated in 6 mol/L KOH+0.02.mol/L KBH 4 solution. The results showed that the surface treatment improves the electrochemical performances such as the electrocatalytic activity, high rate dischargeability and cycling durability of the alloy electrode.

关键词： hydrogen storage alloy electrode Ca substitution surface modification

Parameter estimation for whole-body kinetic model of FDG metabolism

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Progress in Natural Science:Materials International 2006年第11期16卷 1164-1170页

作者： CUI Yunfeng~1, BAI Jing~1**, CHEN Yingmao~2.and TIAN Jiahe~2.1. department of Biomedical Engineering, Tsinghua university, Beijing 100084, China 2. department of Nuclear Medicine, General Hospital of PLA, Beijing 100853, China) department of Biomedical Engineering Tsinghua University Beijing 100084 China

Based on the radioactive tracer [ ~ 18 F]2.fluoro-2.deoxy-D-glucose （FDG）, positron emission tomography （PET）, and compartment model, the tracer kinetic study has become an important method to investigate the glucose metabolic kinetics in human body. In this work, the kinetic parameters of three-compartment and four-parameter model for the FDG metabolism in the tissues of myocardium, lung, liver, stomach, spleen, pancreas, and marrow were estimated through some dynamic FDG-PET experiments. Together with published brain and skeletal muscle parameters, a relatively complete whole-body model was presented. In the liver model, the dual blood supply from the hepatic artery and the portal vein to the liver was considered for parameter estimation, and the more accurate results were obtained using the dual-input rather than the single arterial-input. The established whole-body model provides the functional information of FDG metabolism in human body. It can be used to further investigate the glucose metabolism, and also be used for the simulation and visualization of FDG metabolic process in human body.

关键词： compartment model FDG PET parameter estimation.