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Search Results: 1 - 10 of 23413 matches for " Zheng "
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Demanding Model of Automobile Loan Using Stochastic Theory  [PDF]
Zheng Wang
Technology and Investment (TI) , 2010, DOI: 10.4236/ti.2010.13025
Abstract: We propose a double forecasting model using stochastic theory .The demand of automobile loan is the sum of all compound variables which indicated that automobile loan was credited to customer occurring in a certain period of time. Probability distribution of automobile loan was acquired using throughout probability theory. In view of such a fact, demand of automobile loan can be viewed as a conditional mathematic expectation. The forecasting model is proposed using growing function. Theoretical analysis and Case study shows that model based on conditional expectation is better than other model available with respect to forecasting demand of automobile loan.
A Security Transfer Model Based on Active Defense Strategy  [PDF]
Ying Zheng
Communications and Network (CN) , 2010, DOI: 10.4236/cn.2010.23027
Abstract: This paper proposes a security transfer model founded on the active defense strategy. In the unit of security domains of dynamic overlaying routers, this model defines the intelligent agent/ management of network element together with the self-similar, hierarchical and distributed management structure. Furthermore, we use deceptive packets so that the attackers can not trace back to the encrypted data packets. Finally, according to the digested information from data packets, this model is capable of detecting attacks and tracing back to the attackers immediately. In the meantime, the overlaying routers in the security domain are dynamically administered. In summary, this model not only improves the se-curity of data transfer on the web, but also enhances the effectiveness of the network management and switching efficiency of routers as well.
C0 Approximation on the Spatially Homogeneous Boltzmann Equation for Maxwellian Molecules  [PDF]
Minling Zheng
Applied Mathematics (AM) , 2010, DOI: 10.4236/am.2010.16066
Abstract: In this paper we study the viscosity analysis of the spatially homogeneous Boltzmann equation for Maxwellian molecules. We first show that the global existence in time of the mild solution of the viscosity equation . We then study the asymptotic behaviour of the mild solution as the coefficients , and an estimate on is derived.
Note on Gradient Estimate of Heat Kernel for Schrödinger Operators  [PDF]
Shijun Zheng
Applied Mathematics (AM) , 2010, DOI: 10.4236/am.2010.15056
Abstract: Let be a Schrödinger operator on . We show that gradient estimates for the heat kernel of with upper Gaussian bounds imply polynomial decay for the kernels of certain smooth dyadic spectral operators. The latter decay property has been known to play an important role in the Littlewood-Paley theory for and Sobolev spaces. We are able to establish the result by modifying Hebisch and the author’s recent proofs. We give a counterexample in one dimension to show that there exists in the Schwartz class such that the long time gradient heat kernel estimate fails.
A Modeling Framework for the Planning of Strategic Supply Chain Viewed from Complex Network  [PDF]
Jiangbo Zheng
Journal of Service Science and Management (JSSM) , 2009, DOI: 10.4236/jssm.2009.22016
Abstract: Based on the theory of complex network, this paper focuses on the planning of logistics nodes for strategic supply chain. I propose a practical mathematical modeling framework that simultaneously captures many practical aspects but still understated in the existing literatures of network planning problems. Moreover, capacity expansion and reduction sce-narios are also analyzed as well as modular capacity shifts for the fluctuation of demands. So this paper is of impor-tance for the research of network planning in strategic supply chain systems.
A Novel Mechanism in MPLS Network under Adversarial Uncertainty  [PDF]
Communications and Network (CN) , 2009, DOI: 10.4236/cn.2009.12016
Abstract: The advantage of multi-protocol label switching (MPLS) is its capability to route the packets through explicit paths. But the nodes in the paths may be possibly attacked by the adversarial uncertainty. Aiming at this problem in MPLS Network, in this paper, we propose a novel mechanism in MPLS network under adversar-ial uncertainty, making use of the theory of artificial intelligence, at first, we find the initialized label switching paths (LSPs) using the A* arithmetic, and secondly, during the process of data transmission, we switch the transmission path duly by taking advantage of the non-monotone reasoning mechanism. Com-pared to the traditional route mechanism, the experimental results show that it improves the security if data transmission remarkably under our novel mechanism in MPLS network.
Test of Generating Function and Estimation of Equivalent Radius in Some Weapon Systems and Its Stochastic Simulation  [PDF]
Famei Zheng
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.212220
Abstract: We discuss three-dimensional uniform distribution and its property in a sphere; give a method of assessing the tactical and technical indices of cartridge ejection uniformity in some type of weapon systems. Meanwhile we obtain the test of generating function and the estimation of equivalent radius. The uniformity of distribution is tested and verified with ω2 test method on the basis of stochastic simulation example.
An Enhanced Secure Heuristic-Stochastic Routing Arithmetic in MPLS Network  [PDF]
Ying Zheng
Communications and Network (CN) , 2011, DOI: 10.4236/cn.2011.34026
Abstract: To improve routing security in MPLS network, base on the stochastic routing algorithm, we propose a proactive mechanism we call enhanced secure heuristic-stochastic routing (ESHSR) , which brings to bear Bayesian principle, explores the existence of multiple routes and forces packets to take alternate paths probabilistically. In this paper, we investigate game theoretic techniques to develop routing policies which make interception and eavesdropping maximally difficult. Through simulations, we validate our theoretical results and show how the resulting routing algorithms perform in terms of the security/delay/drop-rate, and we contrast them with the mechanism, secure stochastic routing (SSR). We observed that our scheme makes routing more secure than traditional secure stochastic routing, as they make use of the information of detecting the other side’s behavior.
An Equation of State for Nonaqueous Electrolyte Solutions  [PDF]
Zheng Han
Advances in Chemical Engineering and Science (ACES) , 2012, DOI: 10.4236/aces.2012.24061
Abstract: A two parameters equation of state (EOS) for nonaqueous electrolyte solutions system has been developed. The equation is in terms of Helmholtz free energy and incorporated with results of low density expansion of non-primitive mean spherical approximation. The EOS was tested for experimental data reported in literatures of 9 nonaqueous single electrolyte solutions of which the temperature was 298.15 K, and it also has a good predictive capability for nonaqueous electrolyte solutions at different temperature in this work. The comparisons with EOSs published earlier by other researchers in literatures are carried out in detail.
Do Redistributive Policies Affect Economic Growth?  [PDF]
Zheng Liu
Technology and Investment (TI) , 2013, DOI: 10.4236/ti.2013.41B011
Abstract: To reduce income inequality, redistributive policies are widely adopted by both federal and provincial governments in Canada. Quebec and Canada have a fairer society in OECD countries. However, their economic growth is slower than many other countries. This paper studies how these redistributive policies affect economic growth based on Canadian data for the first time. The growth model is based on standard augmented Solow model and includes several different self-defined policy indexes. Using high quality panel data spanning the period 1982 to 2009 calculated from statistic Canada’s website and Arellano-Bond panel technique, empirical analyses show that redistributive policy is negatively and significantly associated with economic growth. These findings are in accordance with many former literatures and may have important policy significance.
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