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Chinese Physics B 2021年第6期30卷 88-95页

作者： Hao Shen Jia-cheng wu Jian-Wei Xia Zhen Wang College of Electrical and Information Engineering Anhui University of TechnologyMa'anshan 243032China School of Mathematical Sciences Liaocheng UniversityLiaocheng 252059China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China

We investigate the problem of H_(∞) state estimation for discrete-time Markov jump neural networks. The transition probabilities of the Markov chain are assumed to be piecewise time-varying, and the persistent dwell-time switching rule,as a more general switching rule, is adopted to describe this variation characteristic. Afterwards, based on the classical Lyapunov stability theory, a Lyapunov function is established, in which the information about the Markov jump feature of the system mode and the persistent dwell-time switching of the transition probabilities is considered ***, via using the stochastic analysis method and some advanced matrix transformation techniques, some sufficient conditions are obtained such that the estimation error system is mean-square exponentially stable with an H_(∞) performance level, from which the specific form of the estimator can be obtained. Finally, the rationality and effectiveness of the obtained results are verified by a numerical example.

关键词： Markov jump neural networks persistent dwell-time switching rule H_(∞)state estimation meansquare exponential stability

Design,synthesis and biological evaluation of novel non-azole derivatives as potential antifungal agents

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Chinese Chemical Letters 2015年第9期26卷 1161-1164页

作者： Hui Tang Juan wu Wen Zhang Lei Zhao Ya-Hui Zhang cheng-wu Shen Department of Pharmacy Shandong Provincial Hospital Affiliated to Shandong University Department of Pharmacy General Hospital of PIA Chengdu Military Area Command

A series of 3-substituted quinazolinones,2-substituted quinoxalines and 2-substituted benzopyrans were synthesized and evaluated for their antifungal activity in *** new compounds revealed excellent in vitro antifungal activity with broad *** structure-activity relationships（SARs） of the derivatives were *** 9A2 exhibits better antifungal activity against 5 tested fungi in vitro than fluconazole,especially against Trichophyton rubrum and Microsporum *** study provides a series of novel lead compounds for the development of non-azole antifungal agents.

关键词： Non-azole Biological evaluation Structure-activity relationships Synthesis Antifungal agents

A Stability Criterion for Time-Delay Tension Leg Platform Systems Subjected to External Force

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China Ocean Engineering 2009年第1期23卷 49-57页

作者： Chen-Yuan CHEN Chien-wen SHEN cheng-wu CHEN Kevin Fong-Rey LIU Ming-Jen cheng Department of Management Information System Yung- Ta Institute of Technology and Commerce Ping-Tung County 90941 China Department of logistics Management National Kaohsiung First University of Science and Technalgy Kaohsiung City 811 China Department of Logistics Management Shu- Te University Kaohsiung 82445 China Graduate Institute of Management National Kaohsiung First University of Science and Technolgy Kaohsiung City 811 China Department of Safety Health and Environmental Engineering Ming Chi University of Technology Taipei 24301 China

Stability analysis plays a central role in nonlinear system theory and engineering application. Over the past few years, the stability analysis of fuzzy systems has been proposed and there are many successful applications in practical engineering. Therefore, in this paper firstly proposed is the stability analysis on oceanic structure by fuzzy models. In the present study, Takagi-Sugeno （T-S） fuzzy model is proposed for a time delay tension leg platform （TLP） system subjected to an external wave force. In terms of stability analysis, linear matrix inequality （LMI） conditions are derived via Lyapunov theory to guarantee the stability of the TLP system.

关键词： linear matrix inequality tension leg platform fuzzy model

Study of Squeezed Excitons in Polar Semiconductors

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Communications in Theoretical Physics 2009年第3期51卷 545-549页

作者： YIN Miao cheng Ze wu Zi-Xia PING Yun-Xia Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

Some properties of excitons in polar semiconductors are studied theoretically by means of squeezed state variational approach. This method makes it possible to consider bilinear terms of the phonon operators as well as linear terms arising from the Lee-Low-Pines （LLP）-like transformation. The exciton ground state energy and binding energy are calculated numerically. It is shown that the squeezing effect is significant in the case of strong exciton-phonon coupling region.

关键词： squeezed exciton electron-phonon interaction binding energy

Is the X-ray pulsating companion of HD 49798 a possible type Ia supernova progenitor?

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Research in Astronomy and Astrophysics 2015年第11期15卷 1813-1822页

作者： Dong-Dong Liu Wei-Hong Zhou cheng-Yuan wu Bo Wang Yunnan Observatories Chinese Academy of Sciences Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences University of Chinese Academy of Sciences National Astronomical Observatories Chinese Academy of Sciences Yunnan Minzu University

HD 49798（a hydrogen depleted subdwarf O6 star） with its massive white dwarf（WD） companion has been suggested to be a progenitor candidate of a type Ia supernova（SN Ia）. However, it is still uncertain whether the companion of HD 49798 is a carbon-oxygen（CO） WD or an oxygen-neon（ONe） WD. A CO WD will explode as an SN Ia when its mass grows and approaches the Chandrasekhar limit, but the outcome of an accreting ONe WD is likely to be a neutron star. We generated a series of Monte Carlo calculations that incorperate binary population synthesis to simulate the formation of ONe WD ＋ He star systems. We found that there is almost no orbital period as large as HD 49798 with its WD companion in these ONe WD ＋ He star systems based on our simulations, which means that the companion of HD 49798 might not be an ONe WD. We suggest that the companion of HD 49798 is most likely a CO WD, which can be expected to increase its mass to the Chandrasekhar limit by accreting He-rich material from HD 49798. Thus, HD 49798 and its companion may produce an SN Ia as a result of its future evolution.

关键词： progenitor primordial likely uncertain depleted ejection neutron orbital unstable dwarf

A convenient synthesis of 6-demethoxycapillarisin

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Chinese Chemical Letters 2007年第4期18卷 407-408页

作者： Yuan Feng Tong Shuai Chen Yong Hao cheng Song wu Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China

A convenient and effective method for the synthesis of 6-demethoxycapillarisin was described. The highlight was involved in a simple access to the key intermediate 2-ethylthio-5,7-dimethoxy-4H-chromen-4-one from the i... 详细信息

关键词： Synthesis 6-Demethoxycapillarisin Chromone

Analysis and application of error concealment tools in AVS-M decoder

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第z1期7卷 54-58页

作者： YANG cheng SHI Lei wu Xiao-yang ZHANG Ci-xun School of Computer Science Zhejiang University Hangzhou 310027 China Institute of Information and Communication Engineering Zhejiang University Hangzhou 310027 China Institute of Information and Communication Engineering Zhejiang University Hangzhou 310027 China Institute of Information and Communication Engineering Zhejiang University Hangzhou 310027 China

Audio Video coding Standard (AVS) is the latest audio and video coding standard of China. AVS Part 7 (also known as AVS-M) targets mobility applications where error concealment is of great importance. This paper first briefly introduces the general concept of error concealment. Then two error concealment schemes are proposed and implemented on AVS-M decoder under different test conditions. Simulation results of the schemes and suggestions on how to use these tools are also provided.

关键词： Audio Video coding Standard (AVS), Error concealment, Video communication

Aerodynamics of indirect thrust measurement by the impulse method

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Acta Mechanica Sinica 2011年第2期27卷 152-163页

作者： cheng-Kang wu Hai-Xing Wang Xian Meng Xi Chen Wen-Xia Pan PanInstitute of Mechanics Chinese Academy of Sciences 100190 Beijing China School of Astronautics Beijing University of Aeronautics and Astronautics 100191 Beijing China Department of Engineering Mechanics Tsinghua University 100084 Beijing China

The aerodynamic aspects of indirect thrust measurement by the impulse method have been studied both experimentally and numerically. The underlying basic aerodynamic principle is outlined, the phenomena in subsonic, supersonic and arc-heated jets are explored, and factors affecting the accuracy of the method are studied and discussed. Results show that the impulse method is reliable for indirect thrust measurement if certain basic requirements are met, and a simple guideline for its proper application is given.

关键词： Thrust measurement Impulse method Aerodynamic features Cold jet Arc-heated jet

Network pharmacology and molecular docking reveal zedoary turmeric-trisomes in Inflammatory bowel disease with intestinal fibrosis

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World Journal of Clinical Cases 2022年第22期10卷 7674-7685页

作者： Lie Zheng Yong-Yi Ji Yan-cheng Dai Xin-Li Wen Shi-cheng wu Department of Gastroenterology Shaanxi Hospital of Traditional Chinese MedicineShaanxi Provincial Hospital of Traditional Chinese MedicineXi’an 730000Shaanxi ProvinceChina Department of Neurology Xi’an Hospital of Traditional Chinese MedicineXi’an 710021Shaanxi ProvinceChina Department of Gastroenterology Shanghai Traditional Chinese Medicine Integrated HospitalShanghai University of Traditional Chinese MedicineShanghai 200082China Department of Gastroenterology Shaanxi Hospital of Traditional Chinese MedicineXi’an 710003Shaanxi ProvinceChina Department of Proctology Gansu Academy of Traditional Chinese MedicineGanSu Hospital of Traditional Chinese MedicineLanzhou 730050Gansu ProvinceChina

BACKGROUND Inflammatory bowel disease(IBD) is a complex chronic IBD that is closely associated with risk factors such as environment, diet, medications and lifestyle that may influence the host microbiome or immune response to antigens. At present, with the increasing incidence of IBD worldwide, it is of great significance to further study the pathogenesis of IBD and seek new therapeutic targets. Traditional Chinese medicine(TCM) treatment of diseases is characterized by multiple approaches and multiple targets and has a long history of clinical application in China. The mechanism underlying the effect of zedoary turmerictrisomes on inducing mucosal healing in IBD is not *** To explore the effective components and potential mechanism of zedoary turmeric-trisomes in the treatment of IBD with intestinal fibrosis using network pharmacology and molecular docking *** The chemical constituents and targets of Rhizoma zedoary and Rhizoma sanarum were screened using the TCMSP database. The GeneCards database was searched to identify targets associated with intestinal fibrosis in IBD. The intersection of chemical component targets and disease targets was obtained using the Venny 2.1 online analysis platform, and the common targets were imported into the STRING 11.0 database to construct a protein interaction regulatory network. A “zedoary turmeric-trisomes-chemical composition-target-disease” network diagram was subsequently constructed using Cytoscape 3.7.2 software, and the topological properties of the network were analyzed using the “Network Analysis” plug-in. Gene Ontology(GO) and Kyoto Encyclopedia of Genes and Genomes(KEGG) enrichment analyses of the common targets were performed using the DAVID 6.8 database to elucidate the mechanism of zedoary turmeric-trisomes in the treatment of IBD. Subsequently, molecular docking of the compounds and targets with the highest intermediate values in the “zedoary turmeric-trisomes-chemical composition-target-dis

关键词： Network pharmacology Molecular docking Zedoary turmeric trisomes Inflammatory bowel disease Intestinal fibrosis

Direct chemical vapor deposition growth of graphene on Ni particles using solid carbon sources

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Rare Metals 2021年第8期40卷 2275-2280页

作者： Feng Zheng Ying Liu Cai-Li Zhang Jian Wang Nan Dong Pei-De Han Yan-Xia wu Yu-cheng wu College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan030024China Institute of New Carbon Materials Taiyuan University of TechnologyTaiyuan030024China

Graphene has attained a considerable amount of popularity as an attractive ultra-thin reinforcement for nickel(Ni)matrix composites in recent ***,its excellent reinforcement efficiency is suffered from the agglomeration of graphene nanosheets in manufacturing process and the poor bonding strength of graphene with Ni *** overcome these two problems,one of the efficient strategies is to in-situ grow graphene reinforcements on Ni particles for powder *** work aims to synthesize uniform graphene@Ni composite particles by using polymethyl methacrylate(PMMA)as the solid sources for chemical vapor deposition(CVD)*** results demonstrate that few-layer or multilayer graphene with different morphologies can be grown on the particles by controlling the PMMA content and annealed temperature,*** optimum condition for the formation of high-quality few-layer graphene is 1.0 mg·ml^(-1) PMMA and 900℃.A competition mechanism rises from the growth kinetic,and the spatial confinement effect has led to the formation of graphene with different microstructures and morphologies.

关键词： Graphene Ni particles Solid carbon sources Growth mechanism