考虑长期运力合同的班轮收益管理运输路径优化模型

基于收益管理的方法,文章对随机需求环境下班轮运力分配和路径优化问题进行了定量研究。首先针对海运收益管理的特征,建立了考虑长期运力合同、空箱调运的轮运力分配和路径选择随机规划模型,然后应用稳健优化方法对此模型进行求解。最后,通过数值仿真得到了优化的舱位分配方案,比较发现稳健优化模型取得了较确定性规划模型更好的收益,显示了模型和方法对于集装箱海运企业的收益管理问题具有应用价值。     

论河北特色小城镇建设

建设与发展小城镇是统筹城乡经济社会发展的有效途径,是建设社会主义新农村的重要举措,本文针对河北省区域发展的实际,分析了河北小城镇建设存在的问题,在研究小城镇发展模式的基础上,对建设河北特色小城镇进行了有益的探讨。     

浅析智能住宅网络接入法

随着信息化进程的加速,信息的需求必将使网络建设面临着新的发展机遇.目前,与我们家居日常生活密切相关的3类线计算机网络线、电话线、有线电视电缆,它们是智能家居用户相互联系与信息交流的通道.通过对其分析,坚信互联网、通信网与有线电视网络的3网融合是信息发展的必然.     

立足高校师资队伍建设努力做好出国留学工作

师资队伍建设可以说是提高高校办学水平和教学质量的关键所在 ,高校选派优秀教师出国留学是强化师资队伍建设的重要途径 ,就做好高校教师出国留学工作提出了几点措施。     

行政契约变更研究

行政契约的内容可以通过行政主体和相对人协商一致得到变更,也可以在情事发生重大变化及公益可能遭致损害的情况下,由一方当事人予以变更。在特定情况下,行政契约的主体也可能发生变更。基于行政契约的特殊性,其内容或主体的变更存在着有别于私法契约的条件和规则。     

Nonstationary Binary Choice

This paper develops an asymptotic theory for time series binary choice models with nonstationary explanatory variables generated as integrated processes. Both logit and probit models are covered. The maximum likelihood (ML) estimator is consistent but a new phenomenon arises in its limit distribution theory. The estimator consists of a mixture of two components, one of which is parallel to and the other orthogonal to the direction of the true parameter vector, with the latter being the principal component. The ML estimator is shown to converge at a rate of n^3/4 along its principal component but has the slower rate of n^1/4 convergence in all other directions. This is the first instance known to the authors of multiple convergence rates in models where the regressors have the same (full rank) stochastic order and where the parameters appear in linear forms of these regressors. It is a consequence of the fact that the estimating equations involve nonlinear integrable transformations of linear forms of integrated processes as well as polynomials in these processes, and the asymptotic behavior of these elements is quite different. The limit distribution of the ML estimator is derived and is shown to be a mixture of two mixed normal distributions with mixing variates that are dependent upon Brownian local time as well as Brownian motion. It is further shown that the sample proportion of binary choices follows an arc sine law and therefore spends most of its time in the neighborhood of zero or unity. The result has implications for policy decision making that involves binary choices and where the decisions depend on economic fundamentals that involve stochastic trends. Our limit theory shows that, in such conditions, policy is likely to manifest streams of little intervention or intensive intervention.