Showing 2,521 - 2,540 results of 3,115 for search '"mathematical model"', query time: 0.09s Refine Results
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  5. 2525

    Medical Management of Chronic Cholestatic Liver Diseases by Andrea A Gossard, Keith D Lindor

    Published 2000-01-01
    “…The prognosis of patients with these diseases is discussed, and the Mayo Mathematical Models in Cholestatic Liver Disease for both primary biliary cirrhosis and primary sclerosing cholangitis are provided. …”
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    Article
  6. 2526

    The effect of room temperature pre-ageing on tensile and electrical properties of thermomechanically treated Al-Mg-Si alloy by Martinova Z., Damgaliev D., Hirsh M.

    Published 2002-01-01
    “…The experimental data were proceeded statistically and mathematical models were derived for the alloy properties such as tensile strength, electrical conductivity and elongation of the wires during TMT. …”
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    Article
  7. 2527

    Research of the Electric Drive with Intermittent Motion Law by N. A. Voronina, A. D. Umurzakova, L. A. Payuk, K. V. Khatsevskiy

    Published 2020-04-01
    “…The study applied the method of mathematical modeling. The results of the work are the time dependences of the output parameters and the adjustment characteristics of the electric drive with an intermittent law of motion of the shaft of the actuating motor. …”
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    Article
  8. 2528

    A perspective on the 2009 A/H1N1 influenza pandemic in Mexico by Rodolfo Acuňa-Soto, Luis Castaňeda-Davila, Gerardo Chowell

    Published 2010-12-01
    “…Furthermore, we review some features of the 2009 H1N1 influenza pandemic in Mexico in relation to the devastating 1918-1920 influenza pandemic and discuss opportunities for the application of mathematical modeling in the transmission dynamics of pandemic influenza. …”
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    Article
  9. 2529

    Smart-blacklisting:an efficient methodology for mitigating fake block attack in P2P file-sharing systems by Ru-hao YAO, Bing-shuang LIU, De-shuai QU, Yuan ZHOU, Xin-hui HAN

    Published 2013-08-01
    “…Fake block attack intends to prolong the downloading time by providing fake data to make the file block fail in the hash check.P2P file-sharing systems are susceptible to fake block attacks,whereby malicious clients are able to make a big impact on users’ downloading experience.An efficient methodology named Smart-blacklisting,which aims to lessen the downloading time and bandwidth wastes interfered by the attack was proposed through using a mathematic model,and the efficiency of this method was analyzed during a simulation experiment.The ovel approach presents 87% downloading time and 50% bandwidth wastes compare less than those of eMule blacklisting method.…”
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    Article
  10. 2530

    Third-Order Approximate Solution of Chemical Reaction-Diffusion Brusselator System Using Optimal Homotopy Asymptotic Method by Salem Alkhalaf

    Published 2017-01-01
    “…The objective of this paper is to investigate the effectiveness and performance of optimal homotopy asymptotic method in solving a system of nonlinear partial differential equations. Since mathematical modeling of certain chemical reaction-diffusion experiments leads to Brusselator equations, it is worth demanding a new technique to solve such a system. …”
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    Article
  11. 2531

    OPTIMIZATION OF THE DROPPING PERCUSIVE FORCE OF THE MATERIAL IN THE ROLLER OF BALL GRINDING MILL by WANG ShiJiang, ZOU RenPing

    Published 2017-01-01
    “…The theoretical analyses of the ball grinding mill are very necessary for its strength designs and the estimation of its output,but there are a lot of difficulties in the mathematical modeling and theoretical analyses because of the many and complex influence factors. …”
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    Article
  12. 2532

    Dynamic Evolution of the Zinc-Nickel Battery Industry and Evidence from China by Xiangze Shi, Xiao Li, Zijian He, Hui Jiang

    Published 2021-01-01
    “…This paper analyzes the development prospects of zinc-nickel battery industry, further investigates the industry competition in existing markets by mathematical modeling, calculates the equilibrium price and profit of the oligarch competition by using the method of Stackelberg equilibrium and Nash equilibrium, and makes a comparison between them. …”
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    Article
  13. 2533

    Comparison of the photoactivities of two commercial titanium dioxide powders in the degradation of 1,4-dioxane by M. Mehrvar, W. A. Anderson, M. Moo-Young

    Published 2002-01-01
    “…This was found both experimentally and also by mathematical modeling of the radiation within the photoreactor zone. …”
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    Article
  14. 2534

    Environmental Supply Chain Performance Mapping of an Enterprise by Exploring a Novel Vague-Intellectual Approach by Juan Wang, M. Prabhu, Abatihun Alehegn Sewagegn, Anoop Kumar Sahu

    Published 2023-01-01
    “…The authors found as first RG that there are still no mathematical models that could address the generalized trapezoidal fuzzy set (GTFs) based green supply chain performance measurement (GSCPM) multi-level hierarchical index for computing the performance of a production enterprise in % except in the forms of GTF set/scale/crisp value. …”
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    Article
  15. 2535

    Controllability and Observability Criteria for Linear Piecewise Constant Impulsive Systems by Hong Shi, Guangming Xie

    Published 2012-01-01
    “…Impulsive differential systems are an important class of mathematical models for many practical systems in physics, chemistry, biology, engineering, and information science that exhibit impulsive dynamical behaviors due to abrupt changes at certain instants during the dynamical processes. …”
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    Article
  16. 2536

    Comprehensive Error Modeling and Analysis of Face Gear NC Grinding Machine based on Multi-body System Theory by Ming Xingzu, Wang Wei, Zhao Lei, Li Mande

    Published 2015-01-01
    “…By using the theory of multi-body system and Denavit-Hartenberg homogeneous coordinate transformation,the geometric error and thermal error of face gear NC grinding machine is analyzed.According to the principle of face gear meshing and production mechanism of the grinding error,the mathematic model of comprehensive error contains geometric error and thermal error of the face gear NC grinding machine tool is established.Based on the little error assumption and using Matlab software,the error expression which contains six degrees of freedom is got,additionally,the relationship between the six degrees of freedom and six errors which produced by the grinding wheel spindle movement is analyzed and validated.The basis for improve the machining accuracy of gear and error modeling is provided.…”
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    Article
  17. 2537

    APPLICATION OF HARMONIC FUNCTION’S THEORY IN TWO-DIMENSION OPTIMIZATION PROBLEM by ZHANG Jing, SHI WenPu

    Published 2018-01-01
    “…The mathematical models of many engineering problems can often come down to two-dimensional optimization problems,it has been one of the hot issues of seeking the high effective and precision optimizing method.The characteristics of harmonic function and Green theory were used to study the relations between the values of harmonic function and its boundary values,and demonstrate the non-locality of its extreme value.When the objective function of the optimization is harmonic function,the two-dimensional optimization can be simplified as a one-dimensional optimization on the boundary of its feasible region.At last,three examples were given to show the feasibility of the method here.The research ideas and the conclusions can be generalized to the solution of the three-dimensional optimization problems.…”
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    Article
  18. 2538

    Modelling Decision-Making Processes in the Management Support of the Manufacturing Element in the Logistic Supply Chain by Robert Bucki, Petr Suchánek

    Published 2017-01-01
    “…This paper highlights the problems of mathematical modelling for a specific element of the logistic supply chain, that is, the manufacturing system. …”
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    Article
  19. 2539

    Performance analysis and optimization of cooperative spectrum sensing for maximizing secondary throughput by LI Mei-ling1, YUAN Chao-wei1, LI Lin1, YANG Rui-zhe3

    Published 2011-01-01
    “…The relationship among SU,detection threshold,bandwidth,spectrum utilization and secondary throughput in cognitive radio networks was analyzed,which indicates the lower false alarm probability,higher spectrum utilization and larger secondary throughput with less SU in C-CSS(censoring based cooperative spectrum sensing),besides,the required detection threshold for maximizing the secondary throughput different with the traditional CSS under given SU number and the objective demand.Based on the NP criticism,an optimal cooperative spectrum sensing algorithm for maximizing the secondary throughput was proposed by solving the mathematic model to obtain the optimal party of SU and detection threshold.Theoretical analysis and simulation results show that the maximized secondary throughput achieved by the proposed optimal algorithm,while maintaining the given detection probability.…”
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  20. 2540

    Two-level cache based streaming media scheduling algorithm for mobile network by LIAO Jian-xin, YANG Bo, ZHU Xiao-min, WANG Chun

    Published 2007-01-01
    “…A novel caching system architecture for mobile streaming was proposed,which was named 2CMSA(two-level cache mobile streaming architecture).In this system,limitations for mobile streaming system such as small memory size in mobile terminal and low bandwidth in wireless access network were avoided.According to the 2CMSA,a scheduling algorithm of 2CMSS(two-level cache based mobile streaming scheduling) was designed;mathematical models were also achieved to analyze the performance of this scheduling algorithm.Simulation experiment proves that,comparing to the original mobile streaming system,by using the new two-level cache architecture and cache based scheduling algorithm,the network transmission cost and the client startup delay of the mobile streaming services can be decreased effectively.…”
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