党的建设的一项根本建设

党的十六届四中全会通过的《中共中央关于加强党的执政能力建设的决定》,科学地总结了中国共产党执政半个多世纪以来的主要经验,在党的建设史上具有里程碑意义。该《决定》中有两个重要的论断,即“无产阶级夺取政权不容易,执掌好政权尤其是长期执掌好政权更不容易”和“党的执政地位不是与生俱来的,也不是一劳永逸的”,指出了加强党的执政能力建设的重要性和紧迫性。加强党的执政能力建设必须建立一个好的党中央领导核心,坚持理论的与时俱进和在意识形态领域的指导地位,制定一条正确的基本路线并贯彻执行,全面提高各级领导干部的素质和水平,保持党同人民群众的血肉联系。通过加强执政能力建设带动党的各方面建设,带动国家政权建设,进而带动整个社会主义现代化建设。     

间歇开放系统的可靠性分析与数值计算

研究了一种新型的可靠性系统，即间歇开放系统。在建立数学模型的基础上，我们详细分析了系统有关的可靠性问题，不仅获得时刻ｔ系统失效的概率和（０，ｔ］中系统失效的平均次数的瞬态解，而且也获得其平稳结果。最后用数值计算比较了间歇开放系统和经典系统的差别。     

论湖湘文化与湖南现代话剧作家的浪漫笔致

浪漫是湖南现代话剧作家创作的一大风格,该风格的产生与湖湘地域文化有着紧密的关联。在奇山秀水以及浓厚巫傩风尚的滋养与孕育下,湖南现代话剧作家或将丰富想象力投注于作品,通过非常态情节的叙述令其呈现出浓郁的传奇色彩;或借助爱情故事和为了爱情不顾一切痴情男女形象的描绘,表达崇情尚性的情爱观。受时代风气的影响,湖南现代话剧作家笔下的浪漫还表现出集融地域文化与时代风雨的别样形貌特征,如直白抒发情爱欲望,表现主体精神自由“灵”与社会现实“肉”间的分裂与矛盾等。     

中国式现代化生态文明创造及时代超越性

西方资本主义生态现代化之路向是以全球性生态空间修复策略、时间修复策略掺杂生态霸权主义谋划而展现自身的生态叙事合法性的。它所证成的合理性,实质上不过是资本逻辑的生态隐性呈现及非正义剥夺。拒斥“资本丛林”成为新的生态文明创造的基本方向。从实践的生态本体论、认识论以及价值论出发,以构建“地球生命共同体”为鹄的,中国式现代化生态文明创造构筑了一个“人与自然是生命共同体”“人类命运共同体”“人与自然的生态伦理共同体”逐次展开的新路径。它摒弃人与自然对立关系的思维模式,建构了作为对象性的本质力量的生态主体性,塑造了以总体性环境正义为特征的伦理样态,实现了对资本主义生态空间生产的时代超越。中国式现代化生态文明创造的包容性与发展性为其能持续引领全球生态文明提供了可能。     

A Multivariate Model for Repeated Failure Time Measurements

A parametric multivariate failure time distribution is derived from a frailty-type model with a particular frailty distribution. It covers as special cases certain distributions which have been used for multivariate survival data in recent years. Some properties of the distribution are derived: its marginal and conditional distributions lie within the parametric family, and association between the component variates can be positive or, to a limited extent, negative. The simple closed form of the survivor function is useful for right-censored data, as occur commonly in survival analysis, and for calculating uniform residuals. Also featured is the distribution of ratios of paired failure times. The model is applied to data from the literature     

考虑质量失误的供应链博弈模型研究

在理性的制造商和供应商组成的二级供应链中,考虑存在产品质量失误的情况下,通过最优化方法选择中间品的质量水平和制造商的检测水平,以实现供应链的利润最大化.并结合实际情况,根据质量内部、外部失误的不同承担方式,讨论了三种质量损失承担方式,得到在整体损失由两者共同承担的情况下,通过制定合理的内、外部损失分配系数,可以使两者选择水平的纳什均衡解与供应链的全局最优解相符,从而实现供应链全局最优和局部最优的一致.所得结论对指导供应链的有效运作有着较好的实际意义和参考价值.     

按单装配系统中的协同补货问题研究

多库存品的库存系统中各库存品具有需求相关性在现实中很常见,但许多关于库存的文献并没有考虑这一点.针对按单装配系统的特性,本文研究了不同部件需求具有相关性的情况下的库存控制问题,分析了不同部件独立补货和不同部件协同补货两种补货策略.数值分析表明,按单装配系统中部件协同补货策略比部件独立补货策略具有更低的总成本.     

A latent variable model for analyzing mixed longitudinal (k,l)-inflated count and ordinal responses

A random effects model for analyzing mixed longitudinal count and ordinal data is presented where the count response is inflated in two points (k and l) and an (k,l)-Inflated Power series distribution is used as its distribution. A full likelihood-based approach is used to obtain maximum likelihood estimates of parameters of the model. For data with non-ignorable missing values models with probit model for missing mechanism are used.The dependence between longitudinal sequences of responses and inflation parameters are investigated using a random effects approach. Also, to investigate the correlation between mixed ordinal and count responses of each individuals at each time, a shared random effect is used. In order to assess the performance of the model, a simulation study is performed for a case that the count response has (k,l)-Inflated Binomial distribution. Performance comparisons of count-ordinal random effect model, Zero-Inflated ordinal random effects model and (k,l)-Inflated ordinal random effects model are also given. The model is applied to a real social data set from the first two waves of the national longitudinal study of adolescent to adult health (Add Health study). In this data set, the joint responses are the number of days in a month that each individual smoked as the count response and the general health condition of each individual as the ordinal response. For the count response there is incidence of excess values of 0 and 30.     

Tactical production and distribution planning with dependency issues on the production process

Tactical production-distribution planning models have attracted a great deal of attention in the past decades. In these models, production and distribution decisions are considered simultaneously such that the combined plans are more advantageous than the plans resolved in a hierarchical planning process. We consider a two-stage production process, where in the first stage raw materials are transformed into continuous resources that feed the discrete production of end products in the second stage. Moreover, the setup times and costs of resources depend on the sequence in which they are processed in the first stage. The minimum scheduling unit is the product family which consists of products sharing common resources and manufacturing processes. Based on different mathematical modelling approaches to the production in the first stage, we develop a sequence-oriented formulation and a product-oriented formulation, and propose decomposition-based heuristics to solve this problem efficiently. By considering these dependencies arising in practical production processes, our model can be applied to various industrial cases, such as the beverage industry or the steel industry. Computation tests on instances from an industrial application are provided at the end of the paper.     

Editorial collaborators

A simulation study of the binomial-logit model with correlated random effects is carried out based on the generalized linear mixed model (GLMM) methodology. Simulated data with various numbers of regression parameters and different values of the variance component are considered. The performance of approximate maximum likelihood (ML) and residual maximum likelihood (REML) estimators is evaluated. For a range of true parameter values, we report the average biases of estimators, the standard error of the average bias and the standard error of estimates over the simulations. In general, in terms of bias, the two methods do not show significant differences in estimating regression parameters. The REML estimation method is slightly better in reducing the bias of variance component estimates.