检索结果-南通市图书馆

Borel probabilistic and quantitative logic

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china({2. sciences) 2011年第9期54卷 1843-1854页

作者： ZHOU HongJun & WANG GuoJun College of mathematics and information {2.,Shaanxi normal university,Xi’an 710062.china 1. College of mathematics and information {2. Shaanxi Normal University Xi’an 710062 China

The present paper introduces the notion of the probabilistic truth degree of a formula by means of Borel probability measures on the set of all valuations,endowed with the usual product topology,in classical two-valued propositional *** approach not only overcomes the limitations of quantitative logic,which require the probability measures on the set of all valuations to be the countably infinite product of uniform probability measures,but also remedies the drawback that probability logic behaves only *** is proved that the notions of truth degree,random truth degree in quantitative logic and the probability of formulas in probability logic can all be brought as special cases into the unified framework of the probabilistic truth *** quantitative logic and probability logic are *** also proves a one-to-one correspondence between deductively closed theories and topologically closed subsets of the space of all valuations,and a one-to-one correspondence between probabilistic truth degree functions and Borel probability measures on the space of all *** second part of the present paper proposes an axiomatic definition of the probabilistic truth degree,and it is finally proved that each probabilistic truth degree function is represented by a unique Borel probability measure on the space of all valuations in the way given in the first *** a theory which we call probabilistic and quantitative logic in the framework of classical propositional logic is established.

关键词： probabilistic truth degree finite separation property probability logic quantitative logic probabilistic and quantitative logic

Anticoagulation property and security of artificial heart valve material

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china(Technological sciences) 2005年第2期48卷 145-162页

作者： WANG Xianghui1, , LIU Xianghuai1,2., 3, ZHANG Feng2. LI Changrong2. YU Liujiang2. ZHENG Zhihong2. WANG Xi2. JIANG Zhenbin4, CHEN Anqing4 & XU Jingfang3 1. Department of Physics, East china normal {2., Shanghai 2.0062. china 2. Ion Beam Lab, Shanghai Institute of Mini-system and information, Chinese Academy of sciences,Shanghai 2.0050, china 3. Department of Electronics, School of information science and Technology, East china normal Univer- sity, Shanghai 2.0062. china 4. Shanghai Cardiovascular Institute, Zhongshan Hospital, Shanghai 2.0032. china 1. Department of Physics East China Normal University 200062 Shanghai China 2. Ion Beam Lab Shanghai Institute of Mini-system and information Chinese Academy of Sciences 200050 Shanghai China 3. Department of Electronics School of Information Science and Technology East China Normal University 200062 Shanghai China 4. Shanghai Cardiovascular Institute Zhongshan Hospital 200032 Shanghai China

Heart valve diseases threaten human health. One reliable way to save lives of such patients is to replace the pathologically changed heart valves by artificial ones. Over 2.million patients have received LTI-carbon heart valve’s implantation. However, the thrombosis after the implantation is one of the difficulties that need to be solved. In order to improve the blood compatibility and security of mechanical heart valves, ion beam technology was used to modify the surface properties of the materials. The investigation results have been summarized in this paper.

关键词： artificial heart valve, ion implantation, plasma immersed ion implantation, ion beam enhanced deposition.

INVOLUTIVE BASES UNDER COMPOSITION

在线全文

学校读者我要写书评

暂无评论

Journal of Systems science & Complexity 2007年第3期20卷 397-402页

作者： Zailiang TANG Department of mathematics and information {2. Mianyang Normal University Mianyang 621000 China.

In this paper, the behaviors of involutive bases under composition operation are studied. For two kinds of involutive bases, i.e., Pommaret bases, Janet bases, we study their behavior problems under composition. Some ... 详细信息

关键词： Involutive bases Janet bases polynomial composition Pommaret bases.

Progress in the participation of Ca2.-calmodulin in heat shock signal transduction

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:Materials International 2009年第10期19卷 1201-1208页

作者： Rengang Zhou a,b,Bing Li c,d,Hongtao Liu a,c,Daye Sun c,d,a Institute of Genetics and Physiology,hebei Academy of Agricultural sciences,{2. 050051,china b hebei Provincial Key Laboratory of Plant Genetic Engineering,{2. 050051,china c Academy of Life sciences,hebei normal university,{2. {12.,china d hebei Provincial Key Laboratory of Molecular and Cell Biology,{2. {12.,china [a]Institute of Genetics and Physiology Hebei Academy of Agricultural Sciences Shijiazhuang 050051 China [b]hebei Provincial Key Laboratory of Plant Genetic Engineering Shijiazhuang 050051 China [c]Academy of Life sciences Hebei Normal University Shijiazhuang 050016 China [d]hebei Provincial Key Laboratory of Molecular and Cell Biology Shijiazhuang 050016 China

A novel heat shock(HS) signal transduction pathway in plants for the participation of Ca2.-calmodulin(CaM) in HS signal trans-duction was *** induces a rapid increase in intracellular free calcium ion levels([Ca2.]i),and the involvement of phospholipase Cinositol 1,4,5-trisphosphate is one of the factors leading to elevation in [Ca2.]i induced by *** also increases the expression of the CaM gene and the accumulation of the CaM *** CaM isoform,AtCaM3,in Arabidopsis is a key member in the HS signal trans-duction ***3 regulates the activity of CaM-binding protein kinase(AtCBK3) or protein phosphatase(AtPP7),promoting the activation of the HS transcription factor,AtHSFA1a,by phosphorylation/dephosphorylation and the expression of heat shock pro-tein genes,then improving heat tolerance in plants.

关键词： Ca2. Calmodulin Protein kinase Heat shock transcription factor Signal transduction

Robustness and breakup of the spiral wave in a two-dimensional lattice network of neurons

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2010年第4期53卷 672-679页

作者： MA Jun 1,2. TANG Jun 2., ZHANG AiHua 3 & JIA Ya 2.1 Department of Physics, Lanzhou university of Technology, Lanzhou 730050, china 2.Department of Physics, Central china normal university, Wuhan 430079, china 3 College of Electrical and information Engineering, Lanzhou university of Technology, Lanzhou 730050, china 1. Department of Physics Lanzhou University of Technology Lanzhou 730050 China2. Department of Physics Central China Normal University Wuhan 430079 China3. College of Electrical and Information Engineering Lanzhou University of Technology Lanzhou 730050 China

The robustness and breakup of spiral wave in a two-dimensional lattice networks of neurons are investigated. The effect of small- world type connection is often simplified with local regular connection and the long-range connection with certain probability. The network effect on the development of spiral wave can be better described by local regular connection and changeable long-range connection probability than fixed long-range connection probability because the long-range probability could be changeable in realistic biological system. The effect from the changeable probability for long-range connection is simplified by multiplicative noise. At first, a stable rotating spiral wave is developed by using appropriate initial values, parameters and no-flux boundary conditions, and then the effect of networks is investigated. Extensive numerical studies show that spiral wave keeps its alive and robust when the intensity of multiplicative noise is below a certain threshold, otherwise, the breakup of spiral wave occurs. A statistical factor of synchronization in two-dimensional array is defined to study the phase transition of spiral wave by checking the membrane potentials of all neurons corresponding to the critical parameters(the intensity of noise or forcing current)in the curve for factor of synchronization. The Hindmarsh-Rose model is investigated, the Hodgkin-Huxley neuron model in the presence of the channel noise is also studied to check the model independence of our conclusions. And it is found that breakup of spiral wave is easier to be induced by the multiplicative noise in presence of channel noise.

关键词： spiral wave factor of synchronization breakup multiplicative noise robustness

Feature extraction and classification of hyperspectral remote sensing image oriented to easy mixed-classified objects

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2005年第S1期15卷 168-171页

作者： ZHANG Lian-peng~1, LIU Guo-lin~2. JIANG Tao~2.(1. Department of Territory information and Surveying Engineering, Xuzhou normal {2., Xuzhou 2.1009, china 2. Shandong {2. of science and Technology, Tai’an 2.1019,china) Xuzhou normal Univ Dept Terr Information & Surveying Engn Xuzhou 221009 Peoples R China Shandong Univ Sci & Technol Tai An 271019 Peoples R China

The classification of hyperspectral remote sensing data is an important problem theoretically and practically. With the increase of spectral bands, the separability of objects on remote sensing image should be improved. But the effects of traditional algorithm on feature extraction such as principal component analysis(PCA) is not so good for hyperspectral image. The key problem is that PCA can only represent the linear structure of data set; while the data clouds of different objects on hyperspectral image usually distribute on a nonlinear manifold. This paper established an algorithm of nonlinear feature extraction named as nonlinear principal poly lines, based on the algorithm, a classifier is constructed and the classification accuracy of hyperspectral image can be improved.

关键词： hyperspectral remote sensing feature extraction classification

Linearly time-varying channel estimation and training power allocation for OFDM/MIMO systems using superimposed training

在线全文

学校读者我要写书评

暂无评论

science china({2. sciences) 2011年第7期54卷 1456-1470页

作者： ZHANG Han 1,DAI XianHua 2.& Pan DaRu 1 1 School of Physics and Telecommunication Engineering,South china normal {2.,Guangzhou 510006,china 2.Department of information science and Technology,SUN Yat-sen {2.,Guangzhou 51002.,china 1. School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China2. Department of Information Science and Technology SUN Yat-sen University Guangzhou 510026 China

We address the problem of estimating the linearly time-varying (LTV) channel of orthogonal frequency division multiplexing (OFDM)/multiple-input multiple-output (MIMO) systems using superimposed training (ST).The LTV channel is modeled by truncated discrete Fourier *** on this model,a two-step approach is adopted to estimate the LTV channel over multiple OFDM *** also present performance analysis of the channel estimation and derive a closed-form expression for the channel estimation *** is shown that the estimation variances,unlike that of the conventional ST-based schemes,approach to a fixed lower-bound as the training length increases,which is directly proportional to information-pilot power *** wireless communication systems with a limited transmission power,we optimize the ST power allocation by maximizing the lower bound of the average channel *** results show that the proposed approach outperforms the frequency-division multiplexed training schemes.

关键词： OFDM/MIMO systems linearly time-varying channel estimation superimposed training training power allocation

Weighted weak type estimates for commutators of the Marcinkiewicz integrals

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china {2. 2004年第1期47卷 83-95页

作者： DING Yong, LU Shanzhen & ZHANG PuDepartment of mathematics, Beijing normal {2., Beijing 100875, china Department of information and Computing science, Zhejiang Institute of science and Technology, Hangzhou 310033, china 1. Department of mathematics Beijing Normal University 100875 Beijing China 2. Department of information and Computing science Zhejiang Institute of Science and Technology 310033 Hangzhou China

In this paper the authors give the weighted weak LlogL type estimates for a class of the higher order commutator generated by the Marcinkiewicz integral and a BMO function. In addition, the weak type norm inequalities... 详细信息

关键词： Marcinkiewicz integral, commutator, Ap weight, weak type estimate.

Stochastic bi-resonance induced by external noise for Ca^2. signaling in hepatocytes

在线全文

学校读者我要写书评

暂无评论

science china Chemistry 2005年第4期48卷 286-291页

作者： ZHANG Jiqian1,2.HOU Zhonghuai1 & XIN Houwen1 1.Department of Chemical Physics,university of science and Technology of{2.,Hefei 2.002.,china 2.College of Physics and Electronic information,Anhui normal university,Wuhu 2.1000,china 1. Department of Chemical Physics University of Science and Technology of China 230026 Hefei China 2. College of Physics and Electronic information Anhui Normal University 241000 Wuhu China

The influence of external noise on intracellular Ca2. oscillations dynamics in a single cell of rat hepatocytes is *** coherence of noise-induced intracellular Ca2. oscillations reached two maxima for multiple external noise intensity,indicating the occurrence of external noise stochastic bi-resonance (SBR).This phenomenon is compared with our previous result that was induced by internal ***,the deterministic bifurcation character of the system was also discussed.

关键词： stochastic bi-resonance, environment fluctuation, calcium oscillations.