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Software structure evaluation based on the interaction and encapsulation of methods

science China(Information sciences) 2012年第12期55卷 2816-2825页

作者： ZHENG QingHua 1,2,OU ZhiJiang 1,2,LIU Ting 1,YANG ZiJiang 3,HOU YuQiao 1,2 & ZHENG Chao 1,2 1 MOE Key Laboratory for Intelligent Networks and Network Security,Xi'an Jiaotong university,Xian 710049,China 2 Shaanxi Key Laboratory of Satellite-terrestrial Network Technology R&D,Xi'an Jiaotong university,Xian 710049,China 3.department of Computer science,western michigan university,michigan,usa 1. MOE Key Laboratory for Intelligent Networks and Network Security Xi’an Jiaotong University Xian 710049 China2. Shaanxi Key Laboratory of Satellite-terrestrial Network Technology R&D Xi’an Jiaotong University Xian 710049 China3. Department of Computer Science Western Michigan University Michigan USA

Software structure is the most important factor affecting the quality of a *** evaluation of software structure is a foundational technique for software ***,the traditional evaluation criteria,such as "high cohesion and low coupling",are no longer appropriate for the new web applications,which are designed with a hierarchical framework.A novel approach is proposed in this paper to evaluate software quality based on the interaction and encapsulation of *** particular,two criteria for high quality software,the functional and hierarchical structure,are proposed to support widely used web *** cohesion and coupling and layer matching ratios between methods within a software package are calculated to determine whether the package is well implemented in terms of functional or hierarchical *** approach enables us to quantify the quality of a software system according to the structural types of its *** were carried out on 18 versions of Struts and six open-source software *** evaluation concurs with the intuition that minor upgrades,aimed at fixing bugs and adding minor functionality quickly,reduce software quality,whereas major upgrades,which normally clean up messy code and re-construct the software,improve software quality.

关键词： software structure evaluation method interaction method encapsulation functional structure hierarchical structure

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SIGNAL ESTIMATION WITH BINARY-VALUED SENSORS

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Journal of Systems science & Complexity 2010年第3期23卷 622-639页

作者： Leyi WANG Gang George YIN Chanying LI Weixing ZHENG department of Electrical and Computer Engineering Wayne State University Detroit Michigan 48202 USA department of Mathematics Wayne State University Detroit Michigan 48202 USA department of Mechanical Engineering The University of Hong Kong Pokfulam Road Hong Kong China School of Computing and Mathematics University of Western Sydney Australia

This paper introduces several algorithms for signal estimation using binary-valued *** main idea is derived from the empirical measure approach for quantized identification,which has been shown to be convergent and asymptotically efficient when the unknown parametersare *** estimation under binary-valued observations must take into consideration oftime varying *** empirical measure based algorithms are modified with exponentialweighting and threshold adaptation to accommodate time-varying natures of the *** anyinformation on signal generators,the authors establish estimation algorithms,interaction between noisereduction by averaging and signal tracking,convergence rates,and asymptotic efficiency.A thresholdadaptation algorithm is *** convergence and convergence rates are analyzed by using theODE method for stochastic approximation problems.

关键词： Identification signal estimation.

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Several Phase Modulators for Digital Shearography

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Chinese Journal of Lasers 1995年第3期B4卷 263-268页

作者： F. CHEN, Y. Y. HUNG(department of Mechanical Engineering,Oakland university, Rochester Hills,michigan 48309, usa) Oakland Univ Michigan United States

ＳｅｖｅｒａｌＰｈａｓｅＭｏｄｕｌａｔｏｒｓｆｏｒＤｉｇｉｔａｌＳｈｅａｒｏｇｒａｐｈｙ￥Ｆ．ＣＨＥＮ，Ｙ．Ｙ．ＨＵＮＧ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＯａｋｌａｎｄＵｎｉｖｅｒ... 详细信息

ＳｅｖｅｒａｌＰｈａｓｅＭｏｄｕｌａｔｏｒｓｆｏｒＤｉｇｉｔａｌＳｈｅａｒｏｇｒａｐｈｙ￥Ｆ．ＣＨＥＮ，Ｙ．Ｙ．ＨＵＮＧ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＯａｋｌａｎｄＵｎｉｖｅｒｓｉｔｙ，ＲｏｃｈｅｓｔｅｒＨｉｌ...

关键词： digital shearography phase modulator

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Challenges and opportunities:a hopeful future of polymer rheology in China

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中国科学：化学英文版 2010年第1期53卷 151-156页

作者： WANG ShiQing department of Polymer science,university of Akron,Akron,Ohio,usa 1. department of Polymer science University of Akron Akron Ohio USA

Polymer rheology has a long research tradition and holds an important position in the scientific *** is supposed to be a valuable subject to the vast polymer *** article points out the exciting developments that are transforming our understanding of the world of polymer *** discuss not only the emerging challenges in the area but also how China might wish to seize the moment,pick up the trend and take advantage of the potential economic benefits to the huge petro-chemical industry of China.

关键词： polymer rheology polymer processing elastic yielding nonlinear phenomena shear banding

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SYMPLECTIC SCHEMES FOR QUASILINEAR WAVE EQUATIONS OF KLEIN-GORDON AND SINE-GORDON TYPE

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Journal of Computational Mathematics 2001年第5期19卷 475-488页

作者： Xiao-wu Lu (department of Mathematics and Computer science, Emory university, Atlanta, GA 30322, usa) Emory university 美国 30322

Presents a class of finite difference methods of first and second order accuracy for the computation of solutions to the quasilinear wave equations. Overview of general symplectic schemes and generating functional; Nu... 详细信息

关键词： Symplectic integration Sine-Gordon equations Finite difference method.

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INFORMATION AND COMPLEXITY IN CONTROL SYSTEMS: A TUTORIAL

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Journal of Systems science & Complexity 2001年第1期14卷 1-16页

作者： WANG Leyi (department of Electrical and Computer Engineering, Wayne State university, Detroit, michigan 48202, usa) Wayne State university 美国 48202

This is a tutorial paper which presents schematically the concepts of information, uncertainty, and complexity, and their relationships in their applications to control systems. By focusing on exact or lower bounds on achievable performance in the presence of uncertainties, studies of complexity in a control system can potentially reveal fundamentally limiting factors of the system, suggest beneficial modifications to system structures and hardware configurations to remove these limitations, provide benchmark values for evaluating a design and for quantifying rooms for performance improvement, and demonstrate intrinsic tradeoffs. Compared to its counterparts in communications (Shannon’s information theory), computations (computational complexity and information-based complexity), and approxima- tions (n-widths and Kolmogorov entropy), studies of information and complexity in control systems encounter further challenges, such as characterization of feedback robustness, interaction between identification and control, and co-existence of deterministic and stochastic uncertainties. Some of these issues are outlined and discussed.

关键词： Information uncertainty complexity control identification.

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Quasisymmetric property for conjugacies between Anosov diffeomorphisms of the two-torus

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science China Mathematics 2010年第3期53卷 663-670页

作者： HU HuYi 1 & JIANG YunPing 2, 1 department of Mathematics, michigan State university, East Lansing, MI 48824, usa 2 department of Mathematics, the Graduate Center and Queens College of CUNY, Flushing, NY 113.7, usa 1. department of Mathematics Michigan State University East Lansing MI 48824 USA2. Department of Mathematics the Graduate Center and Queens College of CUNY Flushing NY 11367 USA

We prove that the restrictions of the conjugacy between two Anosov diffeomorphisms of the twotorus to the stable and unstable manifolds are quasisymmetric homeomorphisms.

关键词： quasisymmetry Anosov diffeomorphisms conjugacy Hlder condition Markov partition

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Glacial-Interglacial Atmospheric CO_2 Change——The Glacial Burial Hypothesis

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Advances in Atmospheric sciences 2003年第5期20卷 677-693页

作者： Ning ZENG department of Meteorology and Earth System science Interdisciplinary Center, university of Maryland, usa department of Meteorology and Earth System science Interdisciplinary Center University of Maryland USA

Organic carbon buried under the great ice sheets of the Northern Hemisphere is suggested to be the missing link in the atmospheric CO2 change over the glacial-interglacial cycles. At glaciation, the advancement of continental ice sheets buries vegetation and soil carbon accumulated during warmer periods. At deglaciation, this burial carbon is released back into the atmosphere. In a simulation over two glacial-interglacial cycles using a synchronously coupled atmosphere-land-ocean carbon model forced by reconstructed climate change, it is found that there is a 547-Gt terrestrial carbon release from glacial maximum to interglacial, resulting in a 60-Gt (about 30-ppmv) increase in the atmospheric CO2, with the remainder absorbed by the ocean in a scenario in which ocean acts as a passive buffer. This is in contrast to previous estimates of a land uptake at deglaciation. This carbon source originates from glacial burial, continental shelf, and other land areas in response to changes in ice cover, sea level, and climate. The input of light isotope enriched terrestrial carbon causes atmospheric δ13./SUP>C to drop by about 0.3‰ at deglaciation, followed by a rapid rise towards a high interglacial value in response to oceanic warming and regrowth on land. Together with other ocean based mechanisms such as change in ocean temperature, the glacial burial hypothesis may offer a full explanation of the observed 80–100-ppmv atmospheric CO2 change.

关键词： atmospheric CO2 ice age glacial burial hypothesis climate

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A conceptual evolutionary aseismic decision support framework for hospitals

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Earthquake Engineering and Engineering Vibration 2012年第4期11卷 499-512页

作者： Yufeng Hu Gary F. Dargush Xiaoyun Shao department of Civil and Construction Engineering Western Michigan UniversityKalamazoo department of Mechanical and Aerospace Engineering University at BuffaloState University of New YorkBuffalo

In this paper, aconceptual evolutionary framework for aseismic decision support for hospitalsthat attempts to integrate a range of engineering and sociotechnical models is presented. Genetic algorithms are applied to find the optimal decision sets. A case study is completed to demonstrate how the frameworkmay applytoa specific *** simulations show that the proposed evolutionary decision support framework is able to discover robust policy sets in either uncertain or fixed environments. The framework also qualitatively identifies some of the characteristicbehavior of the critical care organization. Thus, by utilizing the proposedframework, the decision makers are able to make more informed decisions, especially toenhance the seismic safety of the hospitals.

关键词： decision making seismic engineering hospital genetic algorithms

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Plasticity Enhancement Processes in NiAl and MoSi_2

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Journal of Materials science & Technology 1993年第6期9卷 405-415页

作者： R.Gibala H.Chang C.M.Czarnik K.M.Edwards A.Misra department of Materials science and Engineering,university of michigan,Ann Arbor,michigan 48109-213.,usa

This paper demonstrates that plasticity enhancement processes previously observed in bcc metals and associated with the presence of surface films and precipitates or dispersoids are operative in or- dered intermetallic compounds.' Some specific results are given for NiAl-and MoSi_2-based *** plasticity of NiAl and related B2 ordered alloys at room temperature during monotonic deformation can be enhanced by application of surface films such as electroless nickel ***- nificant effects are also observed during cyclic *** presence of ductile second phases such as fcc γ or the ordered phase γ' introduced by alloying also enhances the plasticity of NiAl. MoSi_2 exhibits similar effects of surface films and second phases,but primarily at elevated tempera- tures,T>900℃.In this paper,we illustrate the effects of ZrO_2 surface films deposited near room temperature and TiC particulate additions introduced by powder processing *** all cases, the plasticity enhancement is associated with enhanced dislocation generation processes under the conditions of constrained deformation at the film-substrate or precipitate/dispersoid-matrix inter- face of the composite system.

关键词： plasticity ordered intermetallics NiAl MoSi_2

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