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Search Results: 1 - 10 of 50152 matches for " WU Ting "
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Dynamic Behaviors of a Discrete Two Species Predator-Prey System Incorporating Harvesting
Ting Wu
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/429076
Abstract: A discrete two species predator-prey captured system is studied. Firstly, a sufficient condition of a positive equilibrium point for this system is obtained. Secondly, we observe that the two nonnegative equilibriums of the system are unstable through the eigenvalue discriminant method, and the positive equilibrium point is asymptotically stable by Jury criterion. Lastly, we obtain the optimal capture strategy of the system from the maximum principle by constructing a discrete Hamiltonian function. To show the feasibility of the main results, a suitable example together with its numerical simulations is illustrated in the last part of the paper. The example with certain practical significance might give an optimal scheme of the greatest economic benefits for the captors. 1. Introduction With economic development, the rational development and management of the biological resources are directly related to its sustainable development. In this situation, more and more scholars considered the problems on ecological balance of biological systems. Also, the stability and permanence of biological systems are well studied recently [1–4]. According to the aim of people’s capture, we consider both the economic interest and the permanence of predator-prey system in this paper. The aim of this paper is to make a research on some suitable control of the ecological system in order to obtain the existence and development of the system. In earlier stage, papers mainly considered the maximum sustainable yield in the field of optimal capture in order to guarantee the maximum of the capture yield, and the biological resources will not lose their reproduction capacity eventually [5]. Recently, much more papers turn their attention to the optimal capture strategy [6–16]. Similarly, the optimal control theory is also a good way. The predator-prey system is one of the typical ecological systems. For example, Leslie [6, 7] introduced the Leslie-Gower predator-prey systems as follows: where and are the density of prey species and the predator species at time , respectively; and are the intrinsic growth rate of prey and predator; is the density-dependent entry; is the number of eaten by per unit of time; represents the “carrying capacity” of the predator’s environment which is proportional to the number of prey. The Leslie-Gower system admits a unique equilibrium, and Korobeinikov [8] showed that the positive equilibrium is globally asymptotic stable. Recently, Zhang et al. [9] assumed that the predator and prey in the model have commercial importance, and they are subjected to
Research on the Construction of Inclusive Innovation Networks  [PDF]
Wu Zhao, Ting Xiao, Anqi Wang
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.82027
Abstract: Shared value creation concept emphasizes the future development of the enterprise to meet the needs of society into the core activities, create economic value by solving social problems, and make the bottom of the pyramid of low-income groups (BOP) markets for the practice of the concept and provide a comfortable environment. Based on six cases of enterprises operating in China’s rural market, this paper discusses how enterprises can achieve economic returns and create social value strategies and approaches at the same time. Results show that because the BOP market is empty obstacles, such as lack of value chain and the system, enterprises need to build the heterogeneity of organization, institutions and individuals inter-departmental cooperation network to overcome, in the end by connecting two ways to enhance the capacity and promote local market shared value creation.
A theoretical contribution to the fast implementation of null linear discriminant analysis method using random matrix multiplication with scatter matrices
Ting-ting Feng,Gang Wu
Computer Science , 2014,
Abstract: The null linear discriminant analysis method is a competitive approach for dimensionality reduction. The implementation of this method, however, is computationally expensive. Recently, a fast implementation of null linear discriminant analysis method using random matrix multiplication with scatter matrices was proposed. However, if the random matrix is chosen arbitrarily, the orientation matrix may be rank deficient, and some useful discriminant information will be lost. In this paper, we investigate how to choose the random matrix properly, such that the two criteria of the null LDA method are satisfied theoretically. We give a necessary and sufficient condition to guarantee full column rank of the orientation matrix. Moreover, the geometric characterization of the condition is also described.
Power-Minimizing Resource Allocation in Multiuser Cooperative Relay Communications  [PDF]
Bin Chen, Youming Li, Yaohui Wu, Xiaoqing Liu, Ting Zou
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.53B2010
Abstract: In this paper, we investigate the power-minimizing resource allocation problem in multiuser cooperative relay communication systems. A joint optimization problem involving subcarrier assignment, relay selection and power allocation is formulated. Since the problem cannot be solved directly, we decompose it into three subproblems. According to the equivalent channel gains and the target rates of users, the subcarrier assignment and relay selection are conducted. Motivated by the water-filling algorithm, we propose a power allocation algorithm with cooperative features. Simulations results indicate that the proposed algorithm performs better in terms of the total transmit power consumption than the existing algorithms.
Knowledge Integration in ISD Project Teams: A Transactive Memory Perspective  [PDF]
Tung-Ching Lin, Kuang-Ting Cheng, Sheng Wu
Open Journal of Business and Management (OJBM) , 2014, DOI: 10.4236/ojbm.2014.24042
Abstract: Many organizations frequently establish information system development (ISD) project teams in order to solve specific problems. Knowledge tends to be stored within individuals who are often dispersed over time. However, knowledge integration is required to solve new types of problems. The transactive memory system (TMS) has been suggested as a critical mechanism for facilitating knowledge integration as part of the team’s processes. TMS can help the knowledge team to recognize the presence of individuals with diverse knowledge and optimize their value. In this paper, we use TMS and the concept of “collective mind” to explain how the team members’ heedful inter-relations and mindful comprehension function within the social system. We also discuss in detail how antecedent factors affect TMS. Drawing on data from a study of 339 part-time MBA students who were members of knowledge teams, the findings of this research showed that all our hypotheses were statically significant. Discussions and implications for academics and practitioners are provided.
Construction of the Training Mode of the Combination of Clinical Medical Professional Degree Graduate Education and Resident Standardized Training  [PDF]
Jinjun Li, Qingming Wu, Ting Yu, Yi Zou, Yunjie Li
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.76082
Abstract: Beginning in 2014 as a major education reform in China, the implementation of clinical medicine specialized graduate student training combined with standardized resident training system as well as Chinese clinical medical professional degree system binding with the standardized training of residents becomes the highlight and difficulty of this medical educational reform. Through optimizing clinical medical professional degree graduate training scheme and innovative teaching mode and improving the management system, the specialized degree graduate students will be trained to be truly “Qualified doctor \"and high-level applied talents.
Inference of time-varying regression models
Ting Zhang,Wei Biao Wu
Statistics , 2012, DOI: 10.1214/12-AOS1010
Abstract: We consider parameter estimation, hypothesis testing and variable selection for partially time-varying coefficient models. Our asymptotic theory has the useful feature that it can allow dependent, nonstationary error and covariate processes. With a two-stage method, the parametric component can be estimated with a $n^{1/2}$-convergence rate. A simulation-assisted hypothesis testing procedure is proposed for testing significance and parameter constancy. We further propose an information criterion that can consistently select the true set of significant predictors. Our method is applied to autoregressive models with time-varying coefficients. Simulation results and a real data application are provided.
Time-varying nonlinear regression models: Nonparametric estimation and model selection
Ting Zhang,Wei Biao Wu
Statistics , 2015, DOI: 10.1214/14-AOS1299
Abstract: This paper considers a general class of nonparametric time series regression models where the regression function can be time-dependent. We establish an asymptotic theory for estimates of the time-varying regression functions. For this general class of models, an important issue in practice is to address the necessity of modeling the regression function as nonlinear and time-varying. To tackle this, we propose an information criterion and prove its selection consistency property. The results are applied to the U.S. Treasury interest rate data.
Study on the Application of Case Teaching Method in the Cultivation of Master of Professional Clinical Surgery  [PDF]
Yijin Zheng, Jinjun Li, Qingming Wu, Yinxia Wu, Manqin Guo, Ting Yu
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.92017
Abstract: Clinical case teaching method, refers to the use of carefully selected cases, through the positive guidance of teachers and students?autonomic learning,?to enable students to understand the system in clinical medicine theory knowledge,?and?master the basic clinical skills.?In the case teaching of clinical medicine, the choice of the case and the design of the problem?are?the keys.
Evaluation of a Mobile Station Electronic Health Record on Documentation Compliance and Nurses’ Attitudes  [PDF]
Mei-Wen Wu, Ting-Ting Lee, Tzu-Chuan Tsai, Chin-Yi Huang, Francis Fu-Sheng Wu, Mary Etta Mills
Open Journal of Nursing (OJN) , 2015, DOI: 10.4236/ojn.2015.57071
Abstract: Electronic Health Record (EHR) Systems have been adopted by healthcare organizations for documentation of patient care. Often these information systems are embedded in mobile nurse stations. As part of assessing the impact of this technology it is important to determine the effect it has on charting compliance and user acceptance. Data were collected at a medical center in Taiwan in two stages. The first stage involved use of a 28-item medical review tool to measure charting compliance in 99 charts before and after implementation of the EHR system. In stage two, a survey was conducted with 709 nurse users to determine their level of mobile EHR acceptance 3 months after this documentation technology was initiated. Results demonstrated that EHR significantly improved documentation compliance in standardized data entry format (name, date, time), abbreviation, content correction/revision, patient care needs, and care goals. Analysis of data from the five categories of a user acceptance survey revealed the following results (based on a 4-point Likert scale): patient care (2.92), nursing efficiency (2.78), education and training (2.98), usability (2.61), and usage benefits (2.87). The study concluded that use of mobile nurse stations with EHR can improve documentation compliance and that although frequent system downtime needs improvement, nurses generally have positive attitudes toward this technology application.
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