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61.
Here we consider an exponentiated version of the reduced Kies distribution and discuss some of its properties. The parameters of the distribution are estimated by the method of maximum likelihood and illustrated with the help of certain real-life data sets. Asymptotic behavior of the maximum likelihood estimators of the parameters of the distribution is also studied by using certain simulated data sets. 相似文献
62.
In this work, we derive the copulas related to vectors obtained from the so-called chaotic stochastic processes. These are defined by the iteration of certain piecewise monotone functions of the interval [0, 1] to some initial random variable. We study some of its properties and present some examples. Since often these types of copulas do not have closed formulas, we provide a general approximation method which converges uniformly to the true copula. Our results cover a wide class of processes, including the so-called Manneville–Pomeau processes. The general theory is applied to the parametric estimation in certain chaotic processes. A Monte Carlo simulation study is also presented. 相似文献
63.
Abstract This paper considers the various issues that frame the development and use of measures of the subjective work environment. It begins by questioning the role of the work environment in determining occupational health, and explores the possible mechanisms by which that environment might exert its influence. It concludes that one of the important final common pathways is psycho-physiological in nature, and is rooted in individual perception and cognition and the experience of stress. Important for this model are the concepts of mediation and moderation. The measurement of the subjective work environment has often been idiosyncratic to the study in hand, and there are few well-established measures in common use. It is argued that researchers should be careful when deciding not to use established measures and effectively ‘invent’ their own. In developing new measures, decisions have to be made concerning the nature of the measure along with its ‘granularity’ and complexity. It is also argued that it is important that researchers should follow good psychometric practice in the development of those measures. Suggestions for ‘good practice’ are discussed. Attention is drawn to the issues of reliability and validity, and this paper discusses the role of triangulation in the planning and execution of data collection and analysis. The paper ends by reviewing the recommendations made towards the development and use of measures of the subjective work environment. 相似文献
64.
Wesley Johnson 《商业与经济统计学杂志》2013,31(3):369-381
Normal theory separation and allocation problems are discussed from a predictive point of view. Influence statistics are defined and employed to ascertain the impact that particular observations will have on the inferential goals—allocation of future observations, separation between populations, and the determination of probabilities for future cases. Methods are illustrated on a collection of financial data taken from Johnson and Wichern (1982). 相似文献
65.
元末顺帝时期,政治腐败,"三农"问题突出,主要体现在农民生活困苦、农业生产落后、农村管理混乱、村社组织涣散等方面,腐败不堪的政府施政失败,导致了"三农"的相关政策执行不力,给当时的社会造成了严重影响,直接导致了元末经济的崩溃,同时激发了社会阶级矛盾和民族矛盾,加速了元朝的覆灭,还对明初的相关政策措施产生了深远的影响。 相似文献
66.
非物质文化遗产的衰落是必然的,要做好保护工作,就要发掘其自身的生长要素,从而采取相宜的措施。这些措施主要有提高民众的自觉意识、实现可能的功能转换、政府的重视和支持等几个方面。实施非物质文化遗产保护工程,要防止只做“搭台”的角色、搞“官员工程”、脱离群众、不看对象搞“一刀切”、过度开发和文化造假。 相似文献
67.
任峰 《中国农业大学学报(社会科学版)》2016,33(6):106-112
行政诉讼禁令判决,是指根据行政相对人的申请,人民法院作出的,要求行政机关不得实施某项行政行为的判决,是法院为制止违法行政行为可能造成的潜在性风险的一种预防性的判决方式。我国农村邻避型环境群体性事件中,现有权利救济机制存在环境司法治理模式边缘化、政府环境风险监管责任乏力以及事后救济难以恢复生态环境等缺陷,因此,亟有必要在农村邻避型环境群体性事件中引入行政诉讼禁令判决并进行相应的制度构建,从而达到防范环境风险、树立司法权威和保障农民环境权益的目的。 相似文献
68.
As known, the least-squares estimator of the slope of a univariate linear model sets to zero the covariance between the regression residuals and the values of the explanatory variable. To prevent the estimation process from being influenced by outliers, which can be theoretically modelled by a heavy-tailed distribution for the error term, one can substitute covariance with some robust measures of association, for example Kendall's tau in the popular Theil–Sen estimator. In a scarcely known Italian paper, Cifarelli [(1978), ‘La Stima del Coefficiente di Regressione Mediante l'Indice di Cograduazione di Gini’, Rivista di matematica per le scienze economiche e sociali, 1, 7–38. A translation into English is available at http://arxiv.org/abs/1411.4809 and will appear in Decisions in Economics and Finance] shows that a gain of efficiency can be obtained by using Gini's cograduation index instead of Kendall's tau. This paper introduces a new estimator, derived from another association measure recently proposed. Such a measure is strongly related to Gini's cograduation index, as they are both built to vanish in the general framework of indifference. The newly proposed estimator is shown to be unbiased and asymptotically normally distributed. Moreover, all considered estimators are compared via their asymptotic relative efficiency and a small simulation study. Finally, some indications about the performance of the considered estimators in the presence of contaminated normal data are provided. 相似文献
69.
卢文芸 《贵州民族学院学报》2007,(4):176-179
分析了当前生物化学教学中存在的问题;研究和探索了生物化学及其实验教学改革的思路和措施. 相似文献
70.
我国商会预防和应对对华反倾销诉讼的策略及措施 总被引:1,自引:0,他引:1
近年来,在国外我国产品被控反倾销的次数不断增多,而相比之下,胜诉案件的比例却没有同等增长,这对我国的出口贸易秩序和出口贸易发展造成极为不利的影响.商会应利用其自身优势,确定应对对华反倾销诉讼的策略,并采取相应的具体措施,积极参与对华反倾销诉讼活动的各个环节,进而改变预防和应对对华反倾销的各种被动局面. 相似文献