新时期中国影视民俗学的现状与问题

文章依据详实的资料 ,概括了新时期中国影视民俗学的发展现状和存在的问题     

Decision Making and the Price Setting Newsvendor: Experimental Evidence

We present an experimental study of the price‐setting newsvendor problem, which extends the traditional framework by allowing the decision maker to determine both the selling price and the order quantity of a given item. We compare behavior under this model with two benchmark conditions where subjects have a single decision to make (price or quantity). We observe that subjects deviate from the theoretical benchmarks when they are tasked with a single decision. They also exhibit anchoring behavior, where their anchor is the expected demand when quantity is the decision variable and is the initial inventory level when price is the decision variable. When decision makers set quantity and price concurrently, we observe no significant difference between the normative (i.e., expected profit‐maximizing) prices and the decision makers’ price choices. Quantity decisions move further from the normative benchmarks (compared to when subjects have a single decision to make) when the ratio of cost to price is less than half. When this ratio is reversed, there is no significant difference between order levels in single‐ and multi‐task settings. In the multidecision framework, we also observe a tendency to match orders and expected demand levels, which subjects can control using prices.     

习近平党建思想的科学体系与创新价值

习近平党建思想是一个逻辑严密、内容丰富、辩证统一的科学体系。"中国梦"是习近平党建思想科学体系的战略目标,党的思想建设、组织建设、作风建设、反腐倡廉建设和制度建设是习近平党建思想科学体系的主要内容,践行群众路线是习近平党建思想的实践支撑。全面从严治党、突出领导示范、坚持问题导向是习近平党建思想科学体系的核心创新之处。习近平党建思想是马克思主义中国化党建理论的最新成果,是我们党建设中国特色社会主义,实现中华民族伟大复兴的科学指南。     

A Class of Pseudolikelihood Ratio Tests for Homogeneity in Exponential Tilt Mixture Models

Mixture models are commonly used in biomedical research to account for possible heterogeneity in population. In this paper, we consider tests for homogeneity between two groups in the exponential tilt mixture models. A novel pairwise pseudolikelihood approach is proposed to eliminate the unknown nuisance function. We show that the corresponding pseudolikelihood ratio test has an asymptotic distribution as a supremum of two squared Gaussian processes under the null hypothesis. To maintain the appeal of simplicity for conventional likelihood ratio tests, we propose two alternative tests, both shown to have a simple asymptotic distribution of under the null. Simulation studies show that the proposed class of pseudolikelihood ratio tests performs well in controlling type I errors and having competitive powers compared with the current tests. The proposed tests are illustrated by an example of partial differential expression detection using microarray data from prostate cancer patients.     

江河源区湿地生态系统退化机制及保护对策刍议

文章通过对江河源源区湿地生态系统出现的种种环境问题的研究,分析了湿地生态系统退化机制,并对其未来的恢复与保护提出相应对策。     

小流域大问题--甘肃省肃南裕固族自治县生态环境持续恶化所引起的综合问题及思考

根据费孝通教授的建议并受国家民委委托,北京大学、国家民委民族问题研究中心和中央民族大学共同承担了"中国人口较少民族社会、经济发展状况的调查研究"课题任务.这次调查的基本思路是,按照国家西部大开发的战略构想,根据少数民族的特点和区域代表性,重点选择中西部的十个人口规模不超过10万的少数民族,1要求课题组成员深入实地对影响和制约少数民族生活水平和经济发展的主要原因进行实事求是的调查和科学的研究,并针对这些原因(问题)提出能切实解决实际问题的新思路和建议.本报告选择了西部甘肃省肃南裕固族自治县为调查对象,在考察了裕固族聚居区社会经济、文化等综合情况的基础上,确定了专题研究的项目和思路.研究中发现,由肃南小流域生态环境恶化而引起的生态问题和社会问题是严重影响和制约当地裕固族人生存和发展的主要原因,这两个问题甚至威胁到河西走廊整个生态环境和经济发展.为此,我们从可持续发展的战略高度和广度,看待小流域生态环境治理与保护的重要性,提出了"小流域,大问题"的综合治理思路和建议.     

A class of tests of proportional hazards assumption for left-truncated and right-censored data

In this paper, we proposed a class of tests of proportional hazards assumption for left-truncated and right-censored data based on a pair of estimators of the hazard ratio constant. Using counting process and martingale theory, the asymptotically normal distribution of the test statistic is derived and a family of consistent estimators of variance are also provided. Extensive simulation studies were conducted to evaluate the performance of the proposed test statistics under finite sample situations. Two real data sets are analyzed to illustrate our method.     

教育叙事研究:农村中学教师职称评定问题再审视

在我国确立并广泛推行中小学教师评聘制度,有利于调动中小学教师工作的积极性、主动性和创造性,有利于我国教育事业的持续发展。但在现实中,中学教师职称评定依然存在很多问题,特别是农村地区,如评定指标太少、农村老师科研水平较低等。文章采用教育叙事研究方法,通过对一名刚评上高级教师的农村中学教师的访谈,发现中学教师职称评定中还存在评定方式不完善、评定指标不均衡、评定标准不全面、评定对象没动力等方面的问题,并提出相关的对策,有规范评价方式、均衡评价指标、完善评定标准、激发评定对象的动力等,希望能进一步完善这个制度。     

论中国新时期生态小说发展的三种趋势

中国新时期生态小说的发展已经进入瓶颈区。经过20世纪的生态启蒙,生态小说创作数量正快速增长,质量也日渐提升。但无论是在题材和形象塑造上,还是在小说文本的内涵上,都存在着一些影响生态小说良性发展的弊病。中国新时期生态小说要走出当前的困境,需要切实转变创作的趋同性倾向、进行合理的文化批判、深化文学审美和哲学思辨等。