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Sequence-based localization algorithm with improved correlation metric and dynamic centroid

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Science china(Information Sciences) 2011年第11期54卷 2349-2358页

作者： YU Ying 1,JIANG ChunXiao 2.ZHAO XiaoJie 2.YUN LiJun 1,LI ZhiHua 2.& REN Yong 2. College of Information,yunnan Normal university,{2. 650500,china 2.Department of Electronic Engineering,Tsinghua university,Beijing 100084,china 1. College of Information Yunnan Normal University Kunming 650500 China2. Department of Electronic Engineering Tsinghua University Beijing 100084 China

Ecolocation (error controlling localization technique) is a novel sequence-based RF localization algorithm.A key feature of the Ecolocation algorithm is that it constructs a constraint table based on RSSI values and compares data between two ***,the definitions of the constraint and the centroid in the Ecolocation algorithm are imperfect,and result in poor localization *** improve the localization accuracy,a new algorithm based on weighted rank order correlation coefficient and dynamic centroid method is *** results indicate that compared with the Ecolocation,the localization accuracy and robustness of the new algorithm are distinctly raised.

关键词： WSNs (wireless sensor networks) localization sequences constraint table rank order correlation coefficient

Changes of Protective Enzymes and Accumulation of Polyamines Induced by Boron Deficiency in Roots of Rape Seedlings

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Pedosphere 1998年第3期8卷 229-236页

作者： XIAO FENGHUI Department of Biotechnology, yunnan Agricultural university, {{2. 650{2.1 (china) (Received April {2., 1998 revised June {2. 1998) Department of Biotechnology Yunnan Agricultural University Kunming 650201 China

The effects of boron deficiency on the membrane permeability, the lipid peroxidation of membrane, the activities of the protective enzymes and the accumulation of polyamines in the roots of rape ( Brassica napus L. cv Zhongyou 82.) plants were examined using solution culture experiment. Compared to the 2. mmol B m -3 treatment, boron deficient treatment (2.mmol B m -3 ) decreased root dry weight and increased the rate of solute leakage and malondialdehyde (MDA) concentration in the roots of rape. Similar patterns of change were observed in the level of lipid peroxidation (MDA concentration) and the rate of solute leakage under boron deficiency. Results suggested that a significant alteration of membrane composition had occurred under B deficiency. The concentration of putrescine and the ratio of putrescine to spermidine + spermine in the roots of rape increased significantly, and the activities of superoxide dismutase and catalase decreased in the roots of rape during B deficiency. But peroxidase activity in root of B deficient plant was higher than that of control plant.

关键词： boron lipid peroxidation polyamine protective enzymes rape

Theoretical Study on the Dehydrogenation Reaction of H2. by VS+ （3Σ-）

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Chinese Journal of Structural Chemistry 2005年第10期 1111-1116+1101页

作者： GAO Shu-Lina LIU Zheng-Meib XIE Xiao-Guanga a(Department of Chemistry, yunnan university, kunming 650091. china) b(School of Physics and Chemistry, Guizhou Normal {{2., Guiyang 550001, china)

The dehydrogenation reaction of H2. by the 3∑- ground state of VS+: VS+ + H2. → VS2. + H2.has been studied by using Density Functional Theory (DFT) at the B3LYP/DZVP level. It is found that the reaction proceeds along two possible pathways (A and B) yielding two isomer dehydrogenation products VS2.-1 (3B2. and VS2.-2.(3A1), respectively. For both pathways, the reaction has a two-step-reaction mechanism that involves the migration of two hydrogen atoms from S2.to V+, respectively. The migration of the second hydrogen via TS3 and that of the first via TS4 are the rate-determining steps for pathways A and B, respectively. The activation energy is 17.4 kcal/mol for pathway A and 2..8 kcal/mol for pathway B relative to the reactants. The calculated reaction heat of 9.9 kcal/mol indicates the endothermicity of pathway A and that of –11.9 kcal/mol suggests the exothermicity of pathway B.

关键词： density functional theory cationic transition metal sulfide dehydrogenation reaction reaction mechanism

GLOBAL　AND　LOCAL　BIFURCATION　IN　PERTURBATIONS　OF　NON－SYMMETRY　AND　SYMMETRY　OF　HAMILTONIAN　SYSTEM

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Systems Science and Mathematical Sciences 1995年第4期8卷 289-298页

作者： LIU Zhengrong(Institute of Applied Mathematics of yunnan Province Department of Mathematics,yunnan {{2.,kunming 650091.china)JING Zhujun(Institute of Mathematics,Academia Sinica,Bejiing 100080,china) 云南省应用数学所云南昆明中科院数学所北京

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关键词： Non-symmetry perturbed bifurcation detection function.

Manifold contraction for semi-supervised classification

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Science china(Information Sciences) 2010年第6期53卷 1170-1187页

作者： HU EnLiang 1,2., CHEN SongCan 1 & YIN XueSong 1 1 School of Computer Science & Engineering, Nanjing university of Aeronautics & Astronautics, Nanjing 2.0016, china 2.School of Mathematics, {2. Normal university, kunming 650092. china 1. School of Computer Science & Engineering Nanjing University of Aeronautics & Astronautics Nanjing 210016 China2. School of Mathematics Yunnan Normal University Kunming 650092 China

The generalization ability of classification is often closely related to both the intra-class compactness and the inter-class *** to the fact that many current dimensionality reduction methods, regarded as a pre-processor, often lead to the poor classification performance on real-life data, in this paper, a new data preprocessing technique called manifold contraction(MC) is proposed for the classification-oriented learning *** main motivation behind MC lies in seeking a proper mapping of contracting the given multiple-manifold data such that the ratio of the intra-class to the inter-class scatters is ***, in order to properly control the contraction level in MC, an adaptive MC(AMC) criterion is developed in the semi-supervised *** to its generality, MC can be not only applied in original space and reproducing kernel Hilbert space(RKHS), but also easily incorporated with dimensionality reduction method for further improvement of classification *** final experimental results show that MC, as a data preprocessor, is effective and promising in the subsequent classification learning, especially in small-size labeled sample case.

关键词： manifold learning dimensionality reduction lower-dimensional embedding semi-supervised learning classification manifold contraction adaptive manifold contraction

中国政治经济学年度发展报告（2.2.）（下）

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政治经济学评论 2024年第3期 90+207-208页

作者： Center for Studies of Contemporary Political Economy,Research Institute for 2.st-Century Marxism,Nankai university·university of Chinese Academy of Social Science Center for Teaching and Research on Capital,Renmin university of china National Institute of Socialist Political Economy with Chinese Characteristics,Renmin university of china 南开大学·中国社会科学院大学2.世纪马克思主义研究院当代政治经济学研究中心中国人民大学《资本论》教学与研究中心中国人民大学全国中国特色社会主义政治经济学研究中心

编者按2.2.年，高质量发展扎实推进，新质生产力加快形成，我国经济总体回升向好，圆满实现发展主要预期目标。为针对性地破解经济恢复发展中的难题，聚焦推进中国式现代化进程中的重点、难点问题，中国政治经济学界开展系统深入研究，...

编者按2.2.年，高质量发展扎实推进，新质生产力加快形成，我国经济总体回升向好，圆满实现发展主要预期目标。为针对性地破解经济恢复发展中的难题，聚焦推进中国式现代化进程中的重点、难点问题，中国政治经济学界开展系统深入研究，取得系列代表性成果。为准确刻画学界研究进展和轨迹，推动中国经济学理论体系的构建和完善，本刊精选议题如期奉上《中国政治经济学年度发展报告（2.2.）》。自2.10年起，本刊连续十四年发布《中国政治经济学年度发展报告》，“年度发展报告”专栏已成为本刊标志性特色栏目。2.2.年报告聚焦12.专题，分为（上）（下）两篇，其中专题1—6于报告（上）篇刊登，专题7—12.报告（下）篇刊登。2.2.年报告（下）选题如下：

关键词：

Torque model of hydro turbine with inner energy loss characteristics

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Science china(Technological Sciences) 2010年第10期53卷 2826-2832页

作者： ZENG Yun1,2. GUO YaKun2. ZHANG LiXiang1, XU TianMao3 & DONG HongKui4 1 Construction Engineering College, {2. university of Science and Technology, {2. 650051, china 2.School of Engineering, university of Aberdeen, Aberdeen AB2. 3UE, UK 3 Computing Center, {2. university of Science and Technology, {2. 650051, china 4 Hydraulic Energy Department, yunnan Electric Power Test and Research Institute, {2. 6502.7, china 1. Construction Engineering College Kunming University of Science and Technology Kunming 650051 China2. School of Engineering University of Aberdeen Aberdeen AB24 3UE UK3. Computing Center Kunming University of Science and Technology Kunming 650051 China4. Hydraulic Energy Department Yunnan Electric Power Test and Research Institute Kunming 650217 China

This paper presents the result and analysis of the composition of energy loss occurring in the hydro turbine. Two new types of energy losses,namely the hydraulic loss in the flow channel and the impact loss,are defined. All losses within the hydro turbine are divided into four types and the loss coefficients are defined accordingly. Expressions or characteristic descriptions of these losses as well as the calibration method of the loss coefficients are presented. Furthermore,the torque model of the hydro turbine where the inner energy loss takes place is established. The developed model has been used to calculate the power loss due to the mechanical friction generated by the units’ rotation to solve the difficulty of measurements of the mechanical friction loss in the hydro turbine. The definition of the impact loss explains the phenomenon that the loss of no-load is greater than that of the rated operation. A set of conversion coefficients are defined using the characteristic parameters at the rated operation,which are used to transform the parameters in the torque model into those that are easily measured. Therefore,the expression of the hydro turbine power is converted into a function that has the main servomotor displacement as its single variable. This makes the proposed model be convenient to use. Finally,the proposed model and methods are calibrated and verified using the measured data of a hydropower plant. Good agreement between the modeled results and the measurements indicates that the proposed model can represent the inner energy loss characteristics of the hydro turbine.

关键词： hydraulic loss in flow channel impact loss loss coefficients conversion coefficients

Neuroglobin mutation associated with hypoxia adaptation in Tibet chicken

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Progress in Natural Science:Materials International 2007年第12期17卷 1419-1424页

作者： Zhang Lifan1, Liu Chong2. Lian Linsheng3, Zhao Chunjiang1, Bao Haigang1 and Wu Changxin1(1. College of Animal Science and Technology, china Agricultural {2., Beijing 100094, china 2. College of Biological Science, china Agricultural {2., Beijing 100094, china 3. College of Animal Science and Technology, yunnan Agricultural {2., kunming 6502.1, china) College of Animal Science and Technology China Agricultural University Beijing 100094 China College of Biological Science China Agricultural University Beijing 100094 China College of Animal Science and Technology Yunnan Agricultural University Kunming 650201 China

Globin protein family plays an important role in storing and transporting oxygen. As a newly reported globin, the revealed function of neuroglobin includes binding and storing oxygen as well as facilitating the utilization of oxygen in neuronal cells. In the present study, mutations in exons of chicken Ngb gene were identified with the method of sequencing and created restriction site PCR in Tibet chicken and other four lowland chicken breeds. The mutations of Lys-2.2.(E4)-Asn and Ser-2.79(E4)-Gly were identified in exon 4 of the gene. The Lys-2.2.(E4)-Asn mutation existed only in Tibet chicken and the mutation frequencies increased with increasing altitude. Analysis of the haplotype and diplotype of the two mutations in Tibet chicken populations of different altitudes showed that the frequencies of TG haplotype and TTGG diplotype also increased with increasing altitude, while the reverse tendency was found on GGAA diplotype. Under the hypoxic simulation incubation, the main haplotype was TG in living embryos and GA in dead embryos. The results showed that the Lys-2.2.(E4)-Asn mutation may be a specific mutation associated with hypoxia adaptation in Tibet chicken.

关键词： Tibet chicken neuroglobin hypoxia adaptation Ngb gene mutation.

Bifurcations of travelling wave solutions for two generalized Boussinesq systems

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Science china Mathematics 2008年第9期51卷 1577-1592页

作者： LI JiBin1,2.1 Department of Mathematics, Zhejiang Normal university, Jinhua 32.004, china 2.Department of Mathematics, {2. university of Science and Technology, {2. 650093, china Department of Mathematics Zhejiang Normal University Jinhua 321004 China Department of Mathematics Kunming University of Science and Technology Kunming 650093 China

Using the methods of dynamical systems for two generalized Boussinesq systems, the existence of all possible solitary wave solutions and many uncountably infinite periodic wave solutions is obtained. Exact explicit parametric representations of the travelling solutions are given. To guarantee the existence of the above solutions, all parameter conditions are determined.

关键词： nonlinear wave bifurcation solitary wave exact explicit solution generalized Boussinesq system 34C37 34C2. 74J30 58Z05