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Search Results: 1 - 10 of 1946 matches for " Shuqin Che "
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The Stability of Highly Pathogenic Avian Influenza Epidemic Model with Saturated Contact Rate  [PDF]
Shuqin Che, Yakui Xue, Likang Ma
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.521313
Abstract: In this paper we present a highly pathogenic Avian influenza epidemic model with saturated contact rate. According to study of the dynamics, we calculated the basic reproduction number of the model. Through the analysis of this model, we have the following conclusion: if R0 ≤ 1, there is only one disease-free equilibrium which is globally stable, the disease will die; if R0 > 1, there is only one endemic equilibrium which is globally stable, disease will be popular.
Existence of positive solutions for fractional differential equations with Riemann-Liouville left-hand and right-hand fractional derivatives
Shuqin Zhang
Electronic Journal of Differential Equations , 2004,
Abstract: Combining properties of Riemann-Liouville fractional calculus and fixed point theorems, we obtain three existence results of one positive solution and of multiple positive solutions for initial value problems with fractional differential equations.
Context of Situation in Translation
Shuqin Hu
Journal of Language Teaching and Research , 2010, DOI: 10.4304/jltr.1.3.324-326
Abstract: Context is an important concept in language study. According to the theory of systemic-functional linguistics, context of situation determines the meaning system of a text, and therefore translation is a process of reestablishing situational context in target language. Since no identical contexts exist, different translation strategies should be made. From this perspective, the problem of translation criteria can be explored in a new way.
Positive solutions for boundary-value problems of nonlinear fractional differential equations
Shuqin Zhang
Electronic Journal of Differential Equations , 2006,
Abstract: In this paper, we consider the existence and multiplicity of positive solutions for the nonlinear fractional differential equation boundary-value problem $$displaylines{ mathbf{D}_{0+}^alpha u(t)=f(t,u(t)),quad 0 Keywords Caputo's fractional derivative --- fractional differential equation --- boundary-value problem --- positive solution --- fractional Green's function --- fixed-point theorem.
Study on Requirements of Usability of Web Service-Based Enterprise Information Systems  [PDF]
Shuangyuan Shi, Shuqin Cai, Zhonghui Li
iBusiness (IB) , 2013, DOI: 10.4236/ib.2013.53014
Abstract: With the trend of economic globalization and localization services, employees are distributed in different regions, the old enterprise information system in closed environment has been difficult to support all the business in enterprises, also cannot meet the need of information sharing between upstream and downstream enterprises and partners in the supply chain. The new business model requires companies to have distributed information systems, remote access and other characteristics. VPN (virtual private network) is high cost and lack of flexibility, Web services-based information system can achieve low-cost real-time collection to process and share distributed information, which is the ideal model of enterprise information system. However, there is a big gap in current usability between the Web services and old desktop applications. This paper combines the usage patterns, business needs of enterprise information systems and technical characteristics of Web services, proposes the usability requirements of enterprise information systems based on Web services from different views of internal users, external customers and strategic partners.
A Primary Robustness Optimization Strategy of Multi-Item and Low-Volume Process  [PDF]
Jianguo CHE
Journal of Service Science and Management (JSSM) , 2009, DOI: 10.4236/jssm.2009.23024
Abstract: Multi-item and low-volume process is a production system with multi-input source, interactions between input variables, and frequently changes of system state, etc. Strong interactions between input variables and time-varying of input variables cause poor robustness and large variation range of output quality, which produces high cost, heavy waste and low efficiency of multi-item and low-volume process. Robustness optimization of multi-item and low-volume process is a new, important and need-to-deep research field with multi-item and low-volume production system prevails. It proposed a strategy enhancing robustness of multi-item and low-volume process by Taguchi robust design. Firstly, build and analyze a fitting output response model of multi-item and low-volume process after taking the adjustable variables (or time-varying variables) corresponding to each item and interaction between input variables into fitting output response model of multi-item and low-volume process as input variables uniformly, and treating the parameter value of time-varying variables corresponding to each item as level value of the adjustable variables (or signal factors) of process. Secondly, present robustness evaluation index based on evidential theory, desirability function and dual response surface etc. Finally, choose the proper experiment type and optimize the process. And then the robustness optimization of multi-item and low-volume process can be reached.
Investment Analysis about China’s IT Company—The Tencent Holdings Limited  [PDF]
Jingjing Che
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.96072
Abstract: As one of the most huge and potential markets in the world, China has a series of powerful IT companies, such as Tencent, Alibaba, and Xiaomi and so on. Based on such a market and huge population, these companies have very good future in developing and making profits. As a result, studying on them becomes more and more important for the market to know how these companies develop and how their stocks change. This paper focuses on the developing trend of Tencent and tries to provide a valuable investment suggestion for the market. At last, this paper finds that Tencent, as one of the biggest IT companies in China, has very great developing potential with its achievements in the game industry. The main contributions of this paper are that it has found future developing points of Tencent in the game industry and that it points out a new developing power in IT industry, the Entertainment power. The main limitation of this paper is that it has only checked one IT company, the Tencent, instead of comparing different companies to show how Tencent gets benefits from game industry.
Electron states of interfaces in multi-layered phthalocyanine films
Shuqin Zhou,Xiaodong Deng
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883815
Abstract: The interfaces and interface electron states in Mylar/Al/UCL/CGL/CTL multi-layered photoreceptor are discussed. The interface electron states between CGL and CTL in sample A efficiently accelerated photogeneration carrier transport processes to bring about a lower Vr value and higher light sensitivity than sample B. The process might be interpreted as a kind of assistance sensitization effect based on interfacial electron states in the high fields; that is to say, the interface electron states between CGL and CTL accelerated carriers injection from CGL into the gap states of CTL, and followed by the interface electron states modulated transport processes of carriers in the CTL.
1,4-Bis(4-chlorophenyl)butane-1,4-dione
Shuqin Li,Huisheng Li
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808039251
Abstract: The molecule of title compound, C16H12Cl2O2, is centrosymmetric. Thus, the asymmetric unit comprises two half-molecules. The two benzene rings are coplanar in each independent molecule (dihedral angles = 0°). The crystal packing exhibits intermolecular C—H...O hydrogen bonds and C—H...π interactions.
Solutions to boundary-value problems for nonlinear differential equations of fractional order
Xinwei Su,Shuqin Zhang
Electronic Journal of Differential Equations , 2009,
Abstract: we discuss the existence, uniqueness and continuous dependence of solutions for a boundary value problem of nonlinear fractional differential equation.
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