以"三个代表"重要思想为指导办好地方高等农业院校

作为地方高等农业院校学习江泽民总书记“三个代表”重要思想 ,必须把实践“三个代表”全面深入地贯彻到人才培养的全过程。具体讲 ,就是要重视科学技术研究 ,创新人才培养 ,营造科技创新氛围 ,实现科技创新和人才创新 ;要加强党的建设 ,加强思想政治工作和校园文化建设 ,用先进的文化思想占领校园阵地 ;要有高度的社会责任感 ,确立为教学科研服务的意识 ,在科教兴国战略中发挥作用 ,从而忠实履行全心全意为人民服务的宗旨     

Individualism/Collectivism Orientations and Reactions Toward Alternative Human Resource Management Practices

In this study, we examined the relationship between individualism collectivism orientations of potential job seekers and their reactions toward alternative human resource management (HRM) practices in the areas of selection, performance appraisal, reward system, career system, and employment security. Using several subdimensions of individualism collectivism, we found many significant relationships between individualism collectivism orientations and preferences for alternative human resource management practices that might affect the effectiveness of alternative HRM practices.     

Strassen type limit points for moving averages of a wiener process

Let {W(s); 8 ≥ 0} be a standard Wiener process, and let β_N = (2a_N (log (N/a_N) + log log N)^-1/2, 0 < α_N ≤ N < ∞, where α_N↑ and α_N/N is a non-increasing function of N, and define γ_N(t) = β_N[W(n_N + ta_N) ? W(n_N)), 0 ≥ t ≥ 1, with n_N = N – a_N. Let K = {x ? C[0,1]: x is absolutely continuous, x(0) = 0 and }. We prove that, with probability one, the sequence of functions {γ_N(t), t ? [0,1]} is relatively compact in C[0,1] with respect to the sup norm ||·||, and its set of limit points is K. With a_N = N, our result reduces to Strassen's well-known theorem. Our method of proof follows Strassen's original, direct approach. The latter, however, contains an oversight which, in turn, renders his proof invalid. Strassen's theorem is true, of course, and his proof can also be rectified. We do this in a somewhat more general context than that of his original theorem. Applications to partial sums of independent identically distributed random variables are also considered.     

新零售模式下在线零售商融资均衡与协调策略研究

针对电商平台主导的新零售模式,考虑一个在线零售商和一个第三方物流企业（3PL）组成的二级供应链中,银行或3PL企业为面临资金约束的在线零售商提供融资,建立三者之间的Stackelberg博弈模型。研究发现：当在线零售商选择积极型3PL企业融资时,其订购量和系统各参与成员的期望利润更优;当满足协调条件时,若初始资金为常数,3PL企业的利率与运输费之间存在线性递减关系;当满足弱协调条件时,针对不同的初始资金,积极型3PL企业可以设计出多种融资协调合同;资金充足的在线零售商会更偏向协调的积极型3PL企业融资,而不是拒绝任何外部融资。     

Self‐consistent estimation of mean response functions and their derivatives

Many methods have been developed for the nonparametric estimation of a mean response function, but most of these methods do not lend themselves to simultaneous estimation of the mean response function and its derivatives. Recovering derivatives is important for analyzing human growth data, studying physical systems described by differential equations, and characterizing nanoparticles from scattering data. In this article the authors propose a new compound estimator that synthesizes information from numerous pointwise estimators indexed by a discrete set. Unlike spline and kernel smooths, the compound estimator is infinitely differentiable; unlike local regression smooths, the compound estimator is self‐consistent in that its derivatives estimate the derivatives of the mean response function. The authors show that the compound estimator and its derivatives can attain essentially optimal convergence rates in consistency. The authors also provide a filtration and extrapolation enhancement for finite samples, and the authors assess the empirical performance of the compound estimator and its derivatives via a simulation study and an application to real data. The Canadian Journal of Statistics 39: 280–299; 2011 © 2011 Statistical Society of Canada     

Calculation of Phase 2 dose-finding study sample size for reliable Phase 3 dose selection

Sample sizes of Phase 2 dose-finding studies, usually determined based on a power requirement to detect a significant dose–response relationship, will generally not provide adequate precision for Phase 3 target dose selection. We propose to calculate the sample size of a dose-finding study based on the probability of successfully identifying the target dose within an acceptable range (e.g., 80%–120% of the target) using the multiple comparison and modeling procedure (MCP-Mod). With the proposed approach, different design options for the Phase 2 dose-finding study can also be compared. Due to inherent uncertainty around an assumed true dose–response relationship, sensitivity analyses to assess the robustness of the sample size calculations to deviations from modeling assumptions are recommended. Planning for a hypothetical Phase 2 dose-finding study is used to illustrate the main points. Codes for the proposed approach is available at https://github.com/happysundae/posMCPMod .     

基于CVaR风险度量的V2G备用合约优化与协调决策

针对单一风险中性电网公司与单一风险规避电动汽车用户所组成的渠道结构,基于考虑V2G备用的备用交易及实践中普通存在的"保底收购,随行就市"合约价格机制,在CVaR风险度量准则下,构建了具有风险规避特性的电动汽车用户电量预留决策模型,先后考察并比较了分散和集成决策下电网公司与电动汽车用户的最优决策行为。研究发现：电动汽车用户的风险规避特性降低了渠道绩效水平,传统的"保底收购,随行就市"价格机制并不能很好地协调此类V2G备用渠道。在此基础上,利用"回购补贴+市场保护价+保证金"联合契约使得合作系统达到完美协调,且渠道双方的利润均得到Pareto改进。算例分析表明了上述提出模型与方法的基本特征。     

The benefits of joint and separate financial management of couples

Financial management differs across households with consequences for financial outcomes and well-being of partners in households. A large-sample study has been performed, investigating the relationship between financial management of households and the occurrence of financial problems. To our knowledge, this is the first study on this relationship. Data from both partners was collected on having joint and separate bank accounts, on financial decision making, on drivers of financial management, and on financial outcomes. Based on the data, four financial management styles were derived: syncratic/joint, male-dominant, female-dominant, and autonomous financial management. In the syncratic style, partners have a joint bank account and take most financial decisions together. In the male/female-dominant styles, one partner (husband or wife) takes the main financial decisions. In the autonomous style, both partners have their own bank accounts and make their own decisions. As a conclusion, we find that syncratic financial management and having a joint instead of a separate bank account correlates with fewer financial problems, as compared with male-dominant money management and having separate bank accounts. Deciding together as partners is beneficial for the quality of financial management and for avoiding financial problems.     

Principal weighted logistic regression for sufficient dimension reduction in binary classification

Sufficient dimension reduction (SDR) is a popular supervised machine learning technique that reduces the predictor dimension and facilitates subsequent data analysis in practice. In this article, we propose principal weighted logistic regression (PWLR), an efficient SDR method in binary classification where inverse-regression-based SDR methods often suffer. We first develop linear PWLR for linear SDR and study its asymptotic properties. We then extend it to nonlinear SDR and propose the kernel PWLR. Evaluations with both simulated and real data show the promising performance of the PWLR for SDR in binary classification.