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Search Results: 1 - 10 of 134786 matches for " Lin Zhang "
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Reference-Dependent Consumption with Endogenous Labor Supply  [PDF]
Lin Zhang
Theoretical Economics Letters (TEL) , 2015, DOI: 10.4236/tel.2015.54059
Abstract: This paper investigates time-consistent plans by incorporating the reference-dependent consumption model with endogenous labor supply. To what extent these plans can help the consumer overcome the double self-control problems of over-consumption and late-retirement is discussed. The consumption level and labor supply of the preferred personal equilibrium solution are compared with those of ex-ante optimal solution and present-biased solution. For all preferred personal equilibrium plans, both consumption level and labor supply are lower than those of the consumer who is present-biased but without reference-dependent preference. Although the preferred personal equilibrium solutions do not include the ex-ante optimal level, they help mitigate the welfare loss caused by present bias.
Pointwise Approximation Theorems for Combinations of Bernstein Polynomials with Inner Singularities  [PDF]
Wenming Lu, Lin Zhang
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.24047
Abstract: It is well-known that Bernstein polynomials are very important in studying the characters of smoothness in theory of approximation. A new type of combinations of Bernstein operators are given in [1]. In this paper, we give the Bernstein-Markov inequalities with step-weight functions for combinations of Bernstein polynomials with inner singularities as well as direct and inverse theorems.
The Drug Development Based on Pathogenetic Research in Alzheimer’s Disease  [PDF]
Xiaoqian Lin, Qingzhu Zhang
Advances in Alzheimer's Disease (AAD) , 2014, DOI: 10.4236/aad.2014.32007
Abstract: Neuropathologically, Alzheimer’s disease is characterized by the presence of extracellular deposits of amyloid-β peptides, intracellular neurofibrillary tangles and atrophy of the basal forebrain cholinergic neurons. The research of pathogenesis of Alzheimer’s disease inspirits potential clinical drugs for treatment. To block the progression of the disease, drugs under development have to interfere with the pathogenic steps responsible for the clinical symptoms, including cholinergic deficit, calcium dysregulation, inflammation and oxidative damage, and the deposition of amyloid- β plaques and of neurofibrillary tangles. In this review, the pertinent literature about drugs targeted on relieving symptoms above is reviewed. We aim to discuss possible research priorities in the future.
Global Attractor of Two-Dimensional Strong Damping KDV Equation and Its Dimension Estimation  [PDF]
Cheng Zhang, Guoguang Lin
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.51002

Firstly, a priori estimates are obtained for the existence and uniqueness of solutions of two dimensional KDV equations, and prove the existence of the global attractor, finally get the upper bound estimation of the Hausdorff and fractal dimension of attractors.

A Stochastic SIVS Epidemic Model Based on Birth and Death Process  [PDF]
Lin Zhu, Tiansi Zhang
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.49186
Abstract: A new stochastic epidemic model, that is, a general continuous time birth and death chain model, is formulated based on a deterministic model including vaccination. We use continuous time Markov chain to construct the birth and death process. Through the Kolmogorov forward equation and the theory of moment generating function, the corresponding population expectations are studied. The theoretical result of the stochastic model and deterministic version is also given. Finally, numerical simulations are carried out to substantiate the theoretical results of random walk.
The Estimates of the Upper Bounds of Hausdorff Dimensions for the Global Attractor for a Class of Nonlinear Coupled Kirchhoff-Type Equations  [PDF]
Guoguang Lin, Ming Zhang
Advances in Pure Mathematics (APM) , 2018, DOI: 10.4236/apm.2018.81001
Abstract: This paper deals with the Hausdorff dimensions of the global attractor for a class of Kirchhoff-type coupled equations with strong damping and source terms. We obtain a precise estimate of upper bound of Hausdorff dimension of the global attractor.
Reward and Punishment Mechanisms of the Flexible Retirement System in China  [PDF]
Yuming Lin, Le Zhang
Advances in Applied Sociology (AASoci) , 2018, DOI: 10.4236/aasoci.2018.85022
Abstract: This article attempts to understand the reward and punishment mechanisms of the flexible retirement system in China. The life-cycle model is applied in the pay-as-you-go pension system with flexible retirement policy to establish the numerical model of optimal retirement age under the consideration of prolonged life span. The effect of penalty rate for early retirement and incentive rate for delayed retirement on optimal retirement age is studied. Numerical experiments show that appropriate delayed retirement incentive rate incentivises a delayed retirement decision for maximising the total lifetime utility. The optimal retirement age is raised by prolonging lifespan, and the flexible retirement system is an effective means to implement delayed retirement policy.
Clinic Pathological Study of an Eccrine Spiradenoma  [PDF]
Xiao Lin, Xiong Zhang
Journal of Biosciences and Medicines (JBM) , 2019, DOI: 10.4236/jbm.2019.75002
Eccrine Spiradenoma (ES) is an exceedingly rare sweat-gland tumor, it usually presents as a solitary lesion and painful nodule. ES is a kind of neoplasm with distinct histological characteristics and nonspecific clinical manifestations. Most ES cases have a benign course; however, malignant transformation would occur after a long period of latency. The diagnosis mostly depends on the clinic symptom, histological features and immunohistochemistry. Here, we report a case of ES and literature review. The aim of this study is to understand clinic and histological features for ES.
Review on Molecular Typing Methods of Pathogens  [PDF]
Tiehao Lin, Liying Lin, Fan Zhang
Open Journal of Medical Microbiology (OJMM) , 2014, DOI: 10.4236/ojmm.2014.43017
This paper presents several common molecular typing methods, Pulsed-Field Gel Electrophoresis (PFGE), Restriction Fragment Length Polymorphisma (RFLP), Random Amplified Polymorphic DNA (RAPD), Automatic Ribotyping, rep-PCR, Multi-Locus Sequence Typing (MLST), in which the application and progress of molecular typing of pathgens for these methods are described. These methods played an important role in pathgens source tracking, knowing the source(s) of bacteria in pharmaceutical, preventing and controlling the diarrhea and food-poisoning outbreaks, which have great value in the remediation and prevention of further bacterial contamination.
Spatial Segregation Limit of a Quasilinear Competition-Diffusion System  [PDF]
Qunying Zhang, Shan Zhang, Zhigui Lin
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.612175
Abstract: The aim of this paper is to investigate a Volterra-Lotka competition model of quasilinear parabolic equations with large interaction. Some existence, uniqueness and convergence results for the system are given. Also investigated is its spatial segregation limit when the interspecific competition rates become large. We show that the limit problem is similar to a free boundary problem.
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