实践概念的泛化及其逻辑难题——实践存在论美学论析

实践存在论美学以实践为人的存在本体,将实践与存在相结合开启关学思考的路径,实践范畴是其核心范畴,其关于实践及其与相关范畴的逻辑关系的理论思考构成这一美学的理论基石.本文试图依循实践存在论美学自身的理论思路,考察其实践的内涵以及该理论如何将这种实践与密切相关的一些理论关键词,如存在、审美活动、唯物主义等相结合,并进一步对这一理论的美学阐释力作出分析.     

基于协整方法和VAR模型的中国行政管理成本变动分析

一、文献回顾:行政管理成本变动的原因长期以来,国家的行政管理成本问题一直受到学术界的关注。单从现有的定量研究成果看,对于行政管理成本变动的原因,大多数研究者从经济增长角度进行研究,但对于它如何影响政府规模,有两种截然不同的观点:一种观点认为,随着经济的发展,保证行使国家职能的公共支出要不断增加,政府消费性支出占国民所得的比重也不断上升。这就是所谓的“公共支出不断增长法则”,或称“政府活动扩张法则”,又称“瓦格纳法则”。20世纪以来,一些经济学家利用现代计量经济方法进行的研究也证实了这一“法则”。例如,Rubbinson…     

关于扩大内需与适度消费的思考

文章从扩大内需、保持适度消费角度对在新旧体制转换时期,如何使国民经济保持持续稳定快速增长进行了探讨,指出这应该是政府和商家的共同行为,政府的政策性指导,将有助于建立公众正确消费观念.     

中美石油安全水平对经济增长影响的对比研究——基于灰色关联分析

为科学地评价比较中美石油安全水平对经济增长的影响程度,文章采用主成分分析方法,选取采储比水平、储量接替率、消费弹性系数、原油价格波动系数、对外依存度和石油占一次能源消费比重等6个要素指标,构成一个新的石油安全指标评价体系,并利用灰色关联方法比较分析了不同时间段内中美两国的石油安全水平与经济增长之间的关联度,得出自21世纪以来,美国经济发展对石油安全水平的依赖程度要远大于中国的结论。     

我国政府统计中多层次推断问题讨论

当前,多层次推断问题已成为我国在政府统计中推广抽样调查所面临的最大难题。本文回顾了现有解决多层次推断问题的方法,指出这些方法在使用上的限制;提出从改进估计的角度解决多层次推断问题,讨论了借助辅助信息改进估计的方法和建立统计模型进行推估的方法,并指出各种方法的优劣和适用情况;简要探讨了大数据背景下对解决多层次推断问题的一些启示。     

经济增长是否存在“贫困陷阱”

本文从OLG随机增长模型出发,使用中国城市数据估计参数化的产出运动方程,对人均实际产出分布的动态过程进行模拟预测。研究发现,尽管产出运动方程并非严格凹,但稳态均衡唯一,经济增长未出现"贫困陷阱"。长期来看,地区经济最终趋于单峰收敛,采用离差指数衡量经济发展平衡程度的结果显示,经济发展不平衡程度将有所下降。外生扰动(如技术进步、政策扶持)的持续性越强,经济增长收敛越快。     

Reducing bias of the maximum-likelihood estimation for the truncated Pareto distribution

The Pareto distribution is an important distribution in statistics, which has been widely used in finance, physics, hydrology, geology, astronomy, and so on. Even though the parameter estimation for the Pareto distribution has been well established in the literature, the estimation problem for the truncated Pareto distribution becomes complex. This article investigates the bias and mean-squared error of the maximum-likelihood estimation for the truncated Pareto distribution, and some useful results are obtained.     

Generalized varying-coefficient single-index model

In this paper, the generalized varying-coefficient single-index model is discussed based on penalized likelihood. All the unknown functions are fitted by penalized spline. The estimates of the unknown parameters and the unknown coefficient functions are obtained and the estimation approach is rapid and computationally stable. Under some mild conditions, the consistency and the asymptotic normality of these resulting estimators are given. Two simulation studies are carried out to illustrate the performance of the estimates. An application of the model to the Hong Kong environmental data further demonstrates the potential of the proposed modelling procedures.     

Storage Life Prediction for a High-Performance Capacitor Using Multi-Phase Wiener Degradation Model

Capacitance is a critical performance characteristic of high-voltage-pulse capacitor which is used to store and discharge electrical energy rapidly. The capacitors usually are stored for a long period of time before put into use. Experimental result and engineering experience indicate that the capacitance increases with storage time and will eventually exceed the failure threshold, which means that the capacitor may fail during storage. This is a typical mode of degradation failure for long storage products. Further, the capacitance degradation path can be extrapolated in several stages based on the shifting characteristics. That is, the capacitance increases slowly or fluctuates in the initial storage stage that lasts about three months. Then it increases sharply in the middle stage which lasts about four months. After the two stages, the capacitor enters into the third stage in which capacitance increases constantly. This degradation phenomenon motivates us to study the storage life prediction method based on multi-phase degradation path model. The storage performance degradation mechanism of high-voltage-pulse capacitor was investigated, which provides the physical basis for multi-phase Wiener degradation model. Identification procedure for the transition points in the degradation path was proposed using maximum likelihood principle (MLP). The result of Kruskal-Wallis test which is the method to test whether two populations are consistent or not in statistics showed that the transition points are statistically effective. Other parameters in the multi-phase degradation model are estimated with maximum likelihood estimation (MLE) after the transition points have been specified. The multi-phase Inverse Gaussian (IG) distribution for storage life was deduced for the capacitor, and the point and interval estimation procedure for reliable storage life are constructed with bootstrap method. The efficiency and effectiveness of the proposed multi-phase degradation model is compared with storage life prediction under single-phase condition.     

A modified subset selection formulation with special reference to one-way and two-way layout experiments

The usual formulation of subset selection due to Gupta (1956) requires a minimum guaranteed probability of a correct selection. The modified formulation of the present paper includes an additional requirement that the expected number of the nonbest populations be bounded above by a specified constant when the best and the next best populations are ‘sufficiently’ apart. A class of procedures is defined and the determination of the minimum sample size required is discussed. The specific problems discussed for normal populations include selection in terms of means and variances, and selection in terms of treatment effects in a two-way layout.