网络零售配送系统最优运作成本的分析

针对配送运作成本关键部分棗平均运距作出的估计,在车辆路径问题渐进最优理论的基础上,建立了一个平均运作成本最优的规划模型,从经济的角度对运作策略作了简要分析。与其他规划模型不同,新建模型考虑了平均水平的概率特性及众多实际因素,因而具有较好的实用性。     

An Interview with Georg Lind

Georg Lind is being interviewed by Helen Haste about his work in moral psychology. In the interview, he discusses the meaning and measurement of moral competencies, which he sees as crucial to bridge the gap between moral ideals and action, and to maintain modern democracies, which rely on the enactment of shared moral ideals. Lind has carried out and inspired one of the largest research programs in moral psychology, including longitudinal, cross-cultural, intervention, and experimental studies. His new methodology, the Moral Judgment Test, has been translated and adapted into many languages. Lind has also contributed much to the improvement and dissemination of educational methods to foster moral competencies. The intellectual and biographical roots of his interests are explored.     

“启发— 创新”模式与大学英语教学

文章针对目前大学英语教学的现状和存在的问题 ,从教育学的角度出发 ,对大学英语教学模式的改革进行了探讨     

基于最大熵谱估计的机载雷达杂波抑制技术

在讨论机载雷达地面杂波的基础上，利用最大熵估计法对机载雷达杂波进行抑制，并引入了ｃｈｏｌｃｓｋｙ分解快速算法求解最大熵谱的ＡＲ模型参数。计算机模拟表明，基于最大熵谱估计的机载雷达杂波抑制技术有很高的谱分辨率，不仅能跟踪主杂波的频率位置而且能跟踪其谱宽度，因而具有较为满意的杂波对消化与改善因子。     

项目管理:基于生命周期和基于职能活动的管理

对应着项目的"一次性"和"多项活动复合性"的本质特征,项目管理有两种基本模式,即基于生命周期的项目管理和基于职能活动的项目管理,二者的内容体系不同,各有优劣,模式的选用要综合考虑项目的具体性质和企业的发展现状.     

海峡两岸司法协助模式新探

区际司法协助,是中国恢复对香港和澳门行使主权后最迫切需要解决的问题之一。现今在我国区际司法协助实践中已经出现了"安排模式",这种模式初步解决了我国的区际司法协助问题,但还不能说是我国开展区际司法协助的唯一模式。而海峡两岸区际冲突法的独特性和复杂性,使示范立法模式有其运用的空间。     

人才生态环境建构研究

人才成长、培养和使用的环境是否和谐,是否有利于人才的发展和转化,直接决定人才成长的速度、人才培养的质量和人才使用的价值。人才生态环境系统是一个可持续发展的能量交换体,人才在其中能够与人才群体、人才组织、人才社会各生态要素相互联系、相互影响和相互作用,以至形成综合的具有核心竞争能力的生态系统,最终促使人才自我价值的实现,从而有效提升人才的使用价值和社会价值。     

Bayesian validation assessment of multivariate computational models

Multivariate model validation is a complex decision-making problem involving comparison of multiple correlated quantities, based upon the available information and prior knowledge. This paper presents a Bayesian risk-based decision method for validation assessment of multivariate predictive models under uncertainty. A generalized likelihood ratio is derived as a quantitative validation metric based on Bayes’ theorem and Gaussian distribution assumption of errors between validation data and model prediction. The multivariate model is then assessed based on the comparison of the likelihood ratio with a Bayesian decision threshold, a function of the decision costs and prior of each hypothesis. The probability density function of the likelihood ratio is constructed using the statistics of multiple response quantities and Monte Carlo simulation. The proposed methodology is implemented in the validation of a transient heat conduction model, using a multivariate data set from experiments. The Bayesian methodology provides a quantitative approach to facilitate rational decisions in multivariate model assessment under uncertainty.     

基于视觉模型的双正交小波图像水印算法

提出了一种基于人类视觉系统模型的双正交小波多分辨图像水印算法,该算法充分利用小波多分辨的优点及人眼视觉系统的特性,保证了水印的不可见性及鲁棒性,同时在检测水印时也不需要原始图像,仅需涉及到相关的几个细节子图。实验表明该水印算法对于中值滤波、叠加加性噪声、JPEG有损压缩三种图像处理都是鲁棒的。检测算法还有计算量小,检测速度快的特点。     

Optimal sampling for repeated binary measurements

The authors consider the optimal design of sampling schedules for binary sequence data. They propose an approach which allows a variety of goals to be reflected in the utility function by including deterministic sampling cost, a term related to prediction, and if relevant, a term related to learning about a treatment effect To this end, they use a nonparametric probability model relying on a minimal number of assumptions. They show how their assumption of partial exchangeability for the binary sequence of data allows the sampling distribution to be written as a mixture of homogeneous Markov chains of order k. The implementation follows the approach of Quintana & Müller (2004), which uses a Dirichlet process prior for the mixture.