易腐性产品运输设施选择博弈

易腐性产品的价值会随着时间的流逝而逐渐损失,多个客户可以联合使用某种运输设施时,如何对费用进行公平且稳定的分摊是合作能否进行的基础.把易腐性产品的损失价值和运输费用之和作为总费用,进而将易腐性产品的运输设施选择的费用分配问题构造成运输设施选择合作博弈,证明了在易腐性产品负指数价值损失的情况下,运输设施选择博弈的核心非空,且为凹博弈,并讨论了解的特征.论文还证明具有附加运输费用的运输设施选择博弈的核心非空,分析了核心与线性规划松弛的对偶最优解之间的关系.论文对有约束设施选择博弈进行了分析,并提出了进一步研究的方向.     

„Coaching“ durch die Führungskraft — eine kritische Betrachtung

?Leadership Coaching“ — A critical discussion?Leadership Coaching“ comes into vogue again. It is possible that cutting down the expenses for HRM (and specially for counsultants) reinforces this trend. Therefore it is again time to discuss the question about the main differences between “leadership coaching” and coaching by professionals. Consultations by the superior can be helpful, however there are distinct differences to the professional coaching.     

On confidence intervals for nonmonotone parametric functions and an application to the squared mean of the normal distribution

Consider the problem of obtaining a confidence interval for some function g(θ) of an unknown parameter θ, for which a (1-α)-confidence interval is given. If g(θ) is one-to-one the solution is immediate. However, if g is not one-to-one the problem is more complex and depends on the structure of g. In this note the situation where g is a nonmonotone convex function is considered. Based on some inequality, a confidence interval for g(θ) with confidence level at least 1-α is obtained from the given (1-α) confidence interval on θ. Such a result is then applied to the n(μ, σ ²) distribution with σ known. It is shown that the coverage probability of the resulting confidence interval, while being greater than 1-α, has in addition an upper bound which does not exceed Θ(3z_1−α/2)-α/2.     

论中国民事判决效力扩张之反思与限定

大陆法系德日等国民诉立法及学说中的既判力、执行力等民事判决效力的扩张均有限定.而中国的相关司法解释及实务报道却表明中国判决效力扩张存在随意性.预决效力扩张了既判力客观范围,既判力相对性也未得到严格遵循,其有时会不当地向他人扩张;合伙组织清偿能力不足时将合伙人追加为被执行人,是执行力扩张的示例.这些扩张不仅与传统理论不符,也不利于特定主体的程序利益保障.为此应限缩判决效力的扩张.     

压铸机合模机构的优化设计

在对压铸机合模铁三维有限元分析的基础上,提出了以球墨铸铁来代替铸钢制造合模机构的动模板,剖析了动板外形几何尺寸,板厚参数、肋板位置等设计参数对其结构强度的影响动模板的优化设计为压铸机合模机构的改进提供了重要的理论依据。     

Sparse optimization for nonconvex group penalized estimation

We consider a linear regression model where there are group structures in covariates. The group LASSO has been proposed for group variable selections. Many nonconvex penalties such as smoothly clipped absolute deviation and minimax concave penalty were extended to group variable selection problems. The group coordinate descent (GCD) algorithm is used popularly for fitting these models. However, the GCD algorithms are hard to be applied to nonconvex group penalties due to computational complexity unless the design matrix is orthogonal. In this paper, we propose an efficient optimization algorithm for nonconvex group penalties by combining the concave convex procedure and the group LASSO algorithm. We also extend the proposed algorithm for generalized linear models. We evaluate numerical efficiency of the proposed algorithm compared to existing GCD algorithms through simulated data and real data sets.     

一类新的数据变换及其对提高灰预测精度的有效性研究

提出了经过非负函数cg(x)+d变换来提高GM(1,1)模型的预测精度,并从理论上证明,这类变换为级比偏差压缩变换,保证了数据变换后的序列有非负上凹的特性,还原后的误差不会增大等性质,并通过实例对比说明了这种变换的有效性。     

曲轴无飞边精密成形模具系统开发

为了解决曲轴模锻材料利用率低和能耗高的问题，基于有限元数值模拟技术，研究了热锻曲轴的无飞边精密成 形工艺及模具系统。由于曲轴的几何结构单元主要为单缸曲轴，故首先给出了单缸曲轴的热锻工序，包括板式楔横轧、 多向锻造和精锻。利用DEFORM 3D软件对曲轴的无飞边锻造过程进行全程数值模拟，结果表明：楔横轧工序中工件两 端易突起，多向锻造中连杆颈圆角容易折叠，精锻中主轴颈圆角处容易折叠；楔横轧工序最大载荷为250 kN，多向锻造X 向最大载荷为450 kN，精锻最大载荷为5 450 kN。最后将该技术推广到两缸曲轴和多缸曲轴，同样得到了良好的无飞边 结果。     

Bayesian prediction of unobserved values for Type-II censored data

In this paper, we consider posterior predictive distributions of Type-II censored data for an inverse Weibull distribution. These functions are given by using conditional density functions and conditional survival functions. Although the conditional survival functions were expressed by integral forms in previous studies, we derive the conditional survival functions in closed forms and thereby reduce the computation cost. In addition, we calculate the predictive confidence intervals of unobserved values and coverage probabilities of unobserved values by using the posterior predictive survival functions.     

生活真实与艺术真实——杜甫名句“朱门酒肉臭,路有冻死骨”正解补证

“朱门酒肉臭,路有冻死骨”是杜甫《自京赴奉先县咏怀五百字》中的名句。传统认为,“臭”字是腐败难闻的意思,上下两句间构成了鲜明的对比,揭露了当时贫富分化严重的社会问题。当代学人另辟新解,因“臭”字本是多音多义字,根据诗歌的写实性,认为此处读音是xiù,指气味,在此诗句中特指香味。学术界从语言学层面已有深入辨析,否定了新解,其说可从。杜甫经历了极度贫困的生活,建立了独特的社会观察视角,形成了自觉的民本情怀,关怀民生疾苦,关心贫富分化,其诗歌叙事很重要的特点是推己及人,融个体经历与社会观察、感受于一体。从文学表达的自身规律角度看,艺术真实并不等于生活真实,杜甫其实是通过艺术典型化,综合表现了自己既往的生活经验和感受,取得艺术真实的效果。因此,将“朱门酒肉臭”之“臭”字理解为腐败难闻的意思,更符合他的思想与思维习惯。