Examples of doubly stochastic measures supported on the graphs of two functions

A doubly stochastic measure (DSM) is a measure μ on the unit square so that μ([0, 1] × A) = μ(A × [0, 1]) = m(A) where m is Lebesgue measure. The set of DSMs forms a convex set in the space of measures. It is known that DSMs supported on the union of two graphs of invertible functions are extreme points of that convex set (Seethoff and Shiflett, 1977/78 Seethoff, T.L., Shiflett. (1977/78). Doubly stochastic measures with prescribed support. Z. Wahrscheinlichkeitstheorie und Verw. Gebiete 41(4):283–288.[Crossref], [Web of Science ®] , [Google Scholar]). In general, there are few examples of extreme points in the literature. There are examples of so-called hairpins where the functions involved are inverses of each other, but there are also examples of the union of the graphs of a function and its inverse does not support a DSM (Sherwood and Taylor, 1988 Sherwood, H., Taylor, M.D. (1988). Doubly stochastic measures with hairpin support. Probab. Theory Related Fields 78(4):617–626.[Crossref], [Web of Science ®] , [Google Scholar]). In this paper, for a function f in a certain class, we find companion functions g so that the union of the graphs of f and g support a DSM even though the union of the graphs of f and f-inverse do not.     

The exponentiated reduced Kies distribution: Properties and applications

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.     

The effect of different data structures,sample sizes on model fit measures

In this study, our aim was to investigate the changes of different data structures and different sample sizes on the structural equation modeling and the influence of these factors on the model fit measures. Examining the created structural equation modeling under different data structures and sample sizes, the evaluation of model fit measures were performed with a simulation study. As a result of the simulation study, optimization and negative variance estimation problems have been encountered depending on the sample size and changing correlations. It was observed that these problems disappeared either by increasing the sample size or the correlations between the variables in factor. For upcoming studies, the choice of RMSEA and IFI model fit measures can be suggested in all sample sizes and the correlation values for data sets are ensured the multivariate normal distribution assumption.     

Copulas related to piecewise monotone functions of the interval and associated processes

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.     

高校科研经费管理中存在的问题及对策研究

近些年来,我国高校科研经费大幅度增长,科研项目种类日益繁多,给科研经费的管理提出了新的挑战。目前,我国高校科研经费管理中存在着各地各校虽宽严不一,但模式相同,缺乏区别管理,相关部门和责任人各自为政等问题。究其原因是责任意识缺乏和制度建设滞后。解决这些问题的根本出路是通过宣传教育提升相关部门和行为主体的责任意识。有效措施是实行区别管理制度,强化相关职能部门和课题责任人之间的沟通与协调,采取适度灵活的管理政策,有区别地适当提高项目组成员劳务费比重,实行项目主持人责任制。     

城市社区图书馆发展问题探析

社区图书馆在城市社区文化建设中发挥着重要作用,然而由于我国社区图书馆事业起步较晚,经验不足,在建设和发展的进程中还存在许多不足之处,文章详细列举了目前我国社区图书馆普遍存在的问题并阐述了应对策略。     

优化国际语言服务环境背景下关于大学英语写作教学的若干反思

国际语言服务的水平直接体现了一个城市乃至国家的国际化程度,关系到一个城市或国家的国际形象和国际竞争力。随着中国与国际社会的交流日深,对既有自己的专业又具备一定的英语综合运用能力的复合型人才的需求也随之增加。他们不但要有一定的英语口头表达能力,书面表达能力也面临着新的挑战和要求。但我国高校的大学英语课普遍对写作环节重视不足,导致学生的写作基础薄弱。文章分析了大学英语写作过程中存在的普遍性问题并提出了相应的对策。     

金代宗室管理制度考论

金朝十分重视对宗室的管理,设专门管理机构大宗正府,职掌修撰玉牒、监察训导宗室、宗庙祭祀等宗室事务;宗正官基本上由宗室属亲者担任,但也适当参用世戚勋旧。另有御史台、太常寺以及其他相关机构也兼理宗室事务。这些兼管机构与大宗正府相互配合,各司其职,从不同方面实施对宗室的有效管理。鉴于宗室也是威胁皇权的重要因素,金朝统治者对宗室还采取了诸多政令上的防范措施。     

微博时代我国主流意识形态面临的发展格局、挑战及其对策

微博时代,我国主流意识形态面临的机遇和挑战并存。微博的迅猛发展和强大功能,进一步拓展了我国主流意识形态的发展空间,深刻地改变了我国主流意识形态的发展格局。同时,微博也成为各种意识形态争夺的阵地;微博蕴含的政治力量挑战了国家的政治议程;微博谣言泛滥消弱了民众对我国主流价值观的认同。这些都给我国主流意识形态建设带来严峻的挑战。对此,我国主流意识形态必须有所作为,对微博的负面效应进行有效的制度化解和积极应对,确保我国主流意识形态建设稳定、持续、健康的发展。     

生物化学及其实验课程教学的现状及其改革措施——以贵州民族学院为例

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.