(2+1)维KD方程组的一类非亚纯行波解

通过行波变换将(2+1)维KD方程组转变为复域中的常微分方程,给出复合的(2+1)维KD方程组2(wk-3l2+3ak2 C1)u=2k4 u″-k2 a2 u3+(6k2b-3kal)u2+C2,v=lku+C1的一类非亚纯解的结构.     

前言

<正>在我国社会经济进入到新的发展阶段之际,国家提出了转型升级、节能减排、生态文明、美丽中国等中长期规划目标。水体污染控制与治理是我国目前及未来相当长一段时间内环境保护与生态建设的重点任务之一。为了科学和高效     

有机物种类对恒电位电解法测定COD值准确性的影响

以β-PbO2/石墨电极为工作电极,在支持电解溶液中加入一定量待测有机物,在低于析氧电位下进行恒电位电解时,因电极表面吸附态羟基自由基的消耗速率受电解质溶液中有机物分子向电极表面的扩散过程控制,表现为阳极电流强度的增加值(ΔI)与有机物质量浓度ρ之间呈线性关系。本文研究了多种待测有机物的ΔI与ρ的线性关系,发现由于有机物种类不同造成羟基自由基消耗速率不同,因而线性比例系数有所不同。实验结果表明在测定混合水样的化学需氧量(COD)值时,应采用与待测水样具有相似有机物混合比例的标准溶液制作工作曲线,以减少测量误差。     

A Dependent-Chance Programming Model for Proactive Scheduling

Proactive scheduling based on expected value model is an effective method to develop robust schedules in consideration of minimizing project cost caused by deviations between realized and planed activity starting times.However,these schedules may be realized with low probabilities.In this paper,a novel model based on dependent-chance programming(DCP) is proposed,considering probability as well as solution robustness.A hybrid intelligent algorithm integrating stochastic simulation and genetic algorithm(GA)is designed to solve the proposed model.Moreover,a numerical example is conducted to reveal the effectiveness of the proposed model and the algorithm.     

Workload-aware request routing in cloud data center using software-defined networking

Large latency of applications will bring revenue loss to cloud infrastructure providers in the cloud data center. The existing controllers of software-defined networking architecture can fetch and process traffic information in the network. Therefore, the controllers can only optimize the network latency of applications. However, the serving latency of applications is also an important factor in delivered user-experience for arrival requests. Unintelligent request routing will cause large serving latency if arrival requests are allocated to overloaded virtual machines. To deal with the request routing problem, this paper proposes the workload-aware software-defined networking controller architecture. Then, request routing algorithms are proposed to minimize the total round trip time for every type of request by considering the congestion in the network and the workload in virtual machines(VMs). This paper finally provides the evaluation of the proposed algorithms in a simulated prototype. The simulation results show that the proposed methodology is efficient compared with the existing approaches.     

关于随机光滑点

提出随机赋范模中随机光滑点的概念,利用随机赋范模与经典赋范空间的联系,给出了随机光滑点和经典光滑点的关系。最后,利用有限生成随机赋范模的代数结构,给出了几个随机光滑点的基本性质。这些结果将进一步丰富随机赋范模几何学已有的内容。     

基于EPR的供应链治理机制博弈分析

研究了生产者责任延伸(EPR)制度背景下的供应链系统中主体决策影响因素和治理机制的融合问题,基于供应链治理和博弈的理论视角,构造了个体生产者责任(IPR)模式下的非合作博弈模型和集体生产者责任(CPR)模式下的合作博弈模型,分别得出了IPR和CPR模式下企业污染治理技术的最佳决策.研究结果表明,企业的污染治理决策主要取决于企业之间生产技术的差距,以及相互依赖程度.强技术差距和强依赖性更容易导致CPR模式的产生;反之,IPR模式更容易出现在低依赖性和实力相当的企业当中.最后总结了EPR制度下供应链系统动态均衡治理的内部效率机制和外部合法性机制.     

基于GM(1,1)模型的农村公路PCI值预测分析

为了对农村公路的PCI值进行预测,建立了等维递归GM(1,1)模型,并采用后验方差检验模型的精度。最后根据预测模型分别对河南地区农村沥青公路路面和水泥混凝土路面PCI指标进行预测,比较分析了变化的异同和原因。     

水环式真空泵出力低的原因分析及采取措施

针对水环式真空泵运行过程中出现的出力偏低问题,分析了影响真空泵出力的各种因素,并提出了解决水环式真空泵出力低的具体处理措施和建议,填补了该类泵在维护检修上理论及经验方面的不足。     

后方交会技术在实际工作中的应用

本文分析了采用正弦定理解算三角形时出现无解和两解的情况,并从现场实际情况得出结论,凡是现场构成三角形的情况,采用正弦定理解算,除非测量数据有误,都会有解,不会出现无解的情况。对边角后方交会出现无解和多解的情况进行了分析,提出了解决问题的办法。