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2008,a Year for Plants to Celebrate

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Journal of Integrative Plant Biology 2008年第7期50卷 769-770页

作者： Liu, dong Liu, chun-Ming Tsinghua Univ Beijing 100084 Peoples R China Chinese Acad Sci Inst Bot Beijing Peoples R China

2008 is a special year for the Botanical Society of China (BSC)for two reasons. The first one is for the 75th anniversary of the Society, and the second one is for Prof. Zhengyi Wu who received The State Supreme Science and Technology Award,the country’s highest science honor. This special issue, with a collection of 16 articles, is dedicated to these events.

关键词： a Year for Plants to Celebrate BSC Chen

Numerical study on three-dimensional flow field of continuously rotating detonation in a toroidal chamber

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Acta Mechanica Sinica 2012年第1期28卷 66-72页

作者： Xu-dong Zhang Bao-chun Fan Ming-Yue Gui Zhen-Hua Pan Gang dong Science and Technology on Transient Physics LaboratoryNanjing University of Science and Technology 210094 NanjingChina State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology100081 BeijingChina

Gaseous detonation propagating in a toroidal chamber was numerically studied for hydrogen/oxygen/nitrogen mixtures. The numerical method used is based on the three-dimensional Euler equations with detailed finiterate chemistry. The results show that the calculated streak picture is in qualitative agreement with the picture recorded by a high speed streak camera from published literature. The three-dimensional flow field induced by a continuously rotating detonation was visualized and distinctive features of the rotating detonations were clearly depicted. Owing to the unconfined character of detonation wavelet, a deficit of detonation parameters was observed. Due to the effects of wall geometries, the strength of the outside detonation front is stronger than that of the inside portion. The detonation thus propagates with a constant circular velocity. Numerical simulation also shows three-dimensional rotating detonation structures, which display specific feature of the detonation- shock combined wave. Discrete burning gas pockets are formed due to instability of the discontinuity. It is believed that the present study could give an insight into the interest- ing properties of the continuously rotating detonation, and is thus beneficial to the design of continuous detonation propulsion systems.

关键词： Continuously rotating detonation - Three- dimensional flow field structure - Numerical study Detonation parameters deficit ~ Effects of wall geometries

Impact of lymph node micrometastasis on gastric carcinoma prognosis:A meta-analysis

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World Journal of Gastroenterology 2015年第5期21卷 1628-1635页

作者： Yong-Ji Zeng chun-dong Zhang dong-Qiu Dai Department of Gastrointestinal Surgery the Fourth Affiliated Hospital of China Medical University

AIM:To investigate the prognostic significance of lymph node micrometastasis(LNMM) in patients with gastric ***:Two reviewers independently searchedelectronic databases including Pub Med,EMBASE,the Cochrane Database of Systematic Reviews,the Cochrane Controlled Studies Register,and the China National Knowledge Infrastructure electronic database between January 1996 and January *** literature retrieval and data extraction were performed to extract relevant *** analysis was conducted using Rev Man 5.2.4 software,and relative risks(RRs) for patient death in five years and recurrence were calculated.A fixed- or random-effects model was selected to pool and a forest plot was used to display ***:Twelve cohort studies containing a total of 1684 patients were *** positivity was worse than LNMM negativity with regards to the number of patients who died in five *** effects of LNMM positivity in patients with gastric cancer of different T-stages remain *** in patients with gastric carcinoma was also associated with a higher recurrence *** regards to the number of patients who died in five years,Asian patients were worse than European and Australian ***:We recommend that LNMM should not be used as a gold standard for prognosis evaluation in patients with gastric cancer in clinical settings until more high quality trials are available.

关键词： Gastric carcinoma Survival Lymph node micrometasta

A New Type of Solution Method for the Generalized Linear Complementarity Problem over a Polyhedral Cone

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International Journal of Automation and computing 2009年第3期6卷 228-233页

作者： Hong-chun Sun Yan-Liang dong Departinent of Mathematics Linyi Normal University Linyi 276005 PRC Rizhao Vocational and Technical College Rizhao 276800 PRC

This paper addresses the generalized linear complementarity problem （GLCP） over a polyhedral cone. To solve the problem, we first equivalently convert the problem into an affine variational inequalities problem over a closed polyhedral cone, and then propose a new type of method to solve the GLCP based on the error bound estimation. The global and R-linear convergence rate is established. The numerical experiments show the efficiency of the method.

关键词： Generalized linear complementarity problem (GLCP) error bound algorithm global convergence R-linear convergence rate.

The Phenomenon of Mutual Media in Polypyrrole with Electroactive Ions

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Chemical Research in Chinese Universities 1998年第2期14卷 39-44页

作者： YANG chun-he dong Shao-jun Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022

The dependence of the differential capacitance of polypyrrole doped with several typical dopants on potential is presented, which shows that the differential capacitance varies with the potential, the doped polypyrroles with electroactive ions give the largest capacitance near their formal potentials, which is attributed to the mutual media for electron transfer between polypyrrole and electroactive dopants. The existence of two conducting phases was observed in the complex capacitance plots. The electroactive anions act as an intraconductingphase medium for electron transfer, the electroactive cations act as an interconductingphase medium for electron transfer. The mutual media between polypyrrole and redox dopants lead to the increase of the discharging time.

关键词： AC impedance Polypyrrole Methylene blue

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Frontiers of physics 2015年第2期10卷 87-90页

作者： chun Li Fei Long dong-Cheng Mei Department of Computer Science Puer College Puer 665000 China Faculty of Science Kunming University of Science and Technology Kunming 650500 China Department of Physics Yunnan University Kunming 650091 China

The effects of correlation between additive and multiplicative noises on the symmetry of an asymmetric bistable system are investigated. The steady-state probability distribution function of the system was calculated by using analytical and numerical methods. Results indicate that i） for the case of positive correlation between noises, as the correlation strength between additive and multiplicative noises, λ, increases, the symmetry of the system is restored; ii） for the case of negative correlation between noises, as the absolute value of λ increases, the symmetry of the system is destroyed; and iii） the analytic prediction agrees well with the stochastic simulation result.

关键词： asymmetry bistable system correlated noises symmetrical characteristic

A Modeling and Probabilistic Reasoning Method of Dynamic Uncertain Causality Graph for Industrial Fault Diagnosis

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International Journal of Automation and computing 2014年第3期11卷 288-298页

作者： chun-Ling dong Qin Zhang Shi-Chao Geng Department of Geographical Information System Shandong Normal University School of Computer Science and Engineering Beihang University Institute of Nuclear and New Energy Technology Tsinghua University

Online automatic fault diagnosis in industrial systems is essential for guaranteeing safe, reliable and efficient ***, difficulties associated with computational overload, ubiquitous uncertainties and insufficient fault samples hamper the engineering application of intelligent fault diagnosis technology. Geared towards the settlement of these problems, this paper introduces the method of dynamic uncertain causality graph, which is a new attempt to model complex behaviors of real-world systems under uncertainties. The visual representation to causality pathways and self-relied "chaining" inference mechanisms are analyzed. In particular, some solutions are investigated for the diagnostic reasoning algorithm to aim at reducing its computational complexity and improving the robustness to potential losses and imprecisions in observations. To evaluate the effectiveness and performance of this method, experiments are conducted using both synthetic calculation cases and generator faults of a nuclear power plant. The results manifest the high diagnostic accuracy and efficiency, suggesting its practical significance in large-scale industrial applications.

关键词： Fault diagnosis causality model probabilistic graphical model uncertain knowledge representation weighted logic inference.

Effects of correlation time between noises on the noise enhanced stability phenomenon in an asymmetric bistable system

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Frontiers of physics 2015年第1期10卷 95-101页

作者： chun Li Zheng-Lin Jia dong-Cheng Mei Department of Computer Science Puer College Puer 665000 China Department of Physics Yuxi Normal University Yuxi 653100 China Department of Physics Yunnan University Kunming 650091 China

The effects of the correlation time τ between noises on the noise-enhanced stability （NES） phe- nomenon in an asymmetric bistable system driven by cross-correlated noise are investigated. The ex- pressions for the average escape time from the left metastable state TL and from the right metastable state TR are derived. The results indicate that： i） The NES effect is suppressed as the correlation time τ increases for two metastable states; ii） The increase in τ speeds up the escape process from the right state for positively correlated noise, whereas its role is reverses for negatively correlated; iii） In the escape process from the left state, the role of τ is opposite to that in escape from the right state.

关键词： asymmetric bistable system noise correlation time noise enhanced stability

Thermodynamic analysis and simulation for gas baffle entrance collimator of EAST-NBI system based on thermo-fluid coupled method

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Nuclear Science and Techniques 2018年第1期29卷 90-95页

作者： Ling Tao chun-dong Hu Yuan-Lai Xie Institute of Plasma Physics Chinese Academy of Sciences

The world's first full Experimental Advanced Superconducting Tokamak(EAST) is designed with the auxiliary heating method of neutral beam injection(NBI)system. Beam collimators are arranged on both sides of the beam channel for absorbing the divergence beam during the beam transmission process in the EAST-NBI *** gas baffle entrance collimator(GBEC) is a typical high-heat-flux component located at the entrance of gas baffle. An efficient and accurate analysis of its thermodynamic performance is of great significance to explore the working limit and to ensure safe operation of the system under a high-parameter steady-state condition. Based on the thermo-fluid coupled method, thermodynamic analysis and simulation of GBEC is performed to get the working states and corresponding operating limits at different beam extraction conditions. This study provides a theoretical guidance for the next step to achieve long pulse with highpower experimental operation and has an important reference to ensure the safe operation of the system.

关键词： Neutral beam injection High-heat-flux component Beam collimator Thermo-fluid coupled method Thermodynamic analysis