上海多性伴性行为现状及其影响因素研究

本文利用上海市的调查数据,首先考察了上海市多性伴性行为的性别差异,接着从阶层归属、家庭亲属生活、性爱生活和性别规范四个层面对多性伴性行为的影响因素进行理论建构。研究结果表明：在多性伴性行为中,“生理需要论”并不起作用;“资本运作”和“环境影响”取代“阶层归属”发挥显性作用;“婚内感情论”具有一定合理性但也存在时效性,“头两年之痒”和“七年之痒”并存;“越轨”性行为具有连贯性;性别规范通过中间变量（两性在社会、家庭和性领域的角色扮演）间接影响两性的性活动方式。因此,我们需要以社会性别视角鉴别女性“性革命”成功与否,思考女性在性地位上是真正解放还是重新被奴役。     

Variable selection models based on multiple imputation with an application for predicting median effective dose and maximum effect

The statistical methods for variable selection and prediction could be challenging when missing covariates exist. Although multiple imputation (MI) is a universally accepted technique for solving missing data problem, how to combine the MI results for variable selection is not quite clear, because different imputations may result in different selections. The widely applied variable selection methods include the sparse partial least-squares (SPLS) method and the penalized least-squares method, e.g. the elastic net (ENet) method. In this paper, we propose an MI-based weighted elastic net (MI-WENet) method that is based on stacked MI data and a weighting scheme for each observation in the stacked data set. In the MI-WENet method, MI accounts for sampling and imputation uncertainty for missing values, and the weight accounts for the observed information. Extensive numerical simulations are carried out to compare the proposed MI-WENet method with the other competing alternatives, such as the SPLS and ENet. In addition, we applied the MI-WENet method to examine the predictor variables for the endothelial function that can be characterized by median effective dose (ED50) and maximum effect (Emax) in an ex-vivo phenylephrine-induced extension and acetylcholine-induced relaxation experiment.     

Power and stability comparisons of multiple testing procedures with false discovery rate control

High-throughput data analyses are widely used for examining differential gene expression, identifying single nucleotide polymorphisms, and detecting methylation loci. False discovery rate (FDR) has been considered a proper type I error rate to control for discovery-based high-throughput data analysis. Various multiple testing procedures have been proposed to control the FDR. The power and stability properties of some commonly used multiple testing procedures have not been extensively investigated yet, however. Simulation studies were conducted to compare power and stability properties of five widely used multiple testing procedures at different proportions of true discoveries for various sample sizes for both independent and dependent test statistics. Storey's two linear step-up procedures showed the best performance among all tested procedures considering FDR control, power, and variance of true discoveries. Leukaemia and ovarian cancer microarray studies were used to illustrate the power and stability characteristics of these five multiple testing procedures with FDR control.     

Assessment of supplier performance based on product-development strategy by applying multi-granularity linguistic term sets

Measuring supplier performance possesses the properties of multi-dimension and multi-scale, it increases the complexity of the aggregation and assessment process. A focal company must develop an effective procedure for overcoming the complexity of performance measurement. Furthermore, the assessment of supplier performance must conform to the product-developed strategy of the focal company. This study is a further research deeper into the concept already introduced in Chang et al. [1] [Applying fuzzy linguistic quantifier to select supply chain partners at different phases of product life cycle. International Journal of Production Economics 2006; 100(2):348–59]; using multi-granularity linguistic variable and numerical ration scale to represent the overall supply performance. By unifying the derived information, the measurement complexity could be resolved. The fuzzy preference was constructed to adjust the consistent direction and transform information into fuzzy relationship. Finally, fuzzy linguistic quantifier guided ordered weighted aggregation (FLQG-OWA) operator with maximal entropy was computed and aggregated with all indicators to meet the current policy of the focal company.     

Games With Discontinuous Payoffs: A Strengthening of Reny's Existence Theorem

We provide a pure Nash equilibrium existence theorem for games with discontinuous payoffs whose hypotheses are in a number of ways weaker than those of the theorem of Reny (1999). In comparison with Reny's argument, our proof is brief. Our result subsumes a prior existence result of Reny (1999) that is not covered by his theorem. We use the main result to prove the existence of pure Nash equilibrium in a class of finite games in which agents' pure strategies are subsets of a given set, and in turn use this to prove the existence of stable configurations for games, similar to those used by Schelling (1971, 1972) to study residential segregation, in which agents choose locations.     

迎接中国多渠道零售革命的风暴

近几年,随着信息技术的快速发展,我国涌出诸多新的零售渠道类型,导致多渠道零售革命的爆发。这场革命的原因是信息技术发展,内容是多渠道协同并存,主体是制造商、销售商、物流商、信息商和银行等共同参与。多渠道革命包括零售组合和整合的两种基本类型。其应对策略是根据零售业购物、娱乐和社交的三个本质特征,以及顾客关注和竞争优势,选择零售的定位,并通过营销组合以及多渠道协同实现确定的定位优势。     

基层党组织执政能力建设与农村“混混”难题的破解

依据青岛海底隧道第三施工合同段的施工实践,介绍了多重防腐锚杆在海域段初期支护中的应用。从系统锚杆的工作原理、锚杆参数选择、施工工艺、质量控制等方面做了详细的介绍,对期间遇到的问题及解决方法也提出了建议和意见,可为类似工程提供借鉴。     

基于多种不确定性参数分布的U-GERT网络模型及其应用研究

针对随机网络研究中活动参数的分布是不确定信息的情况,本文提出了不确定信息的GERT网络模型,并利用信号流图原理研究了不确定信息的GERT网络仿真算法;研究了不确定变量GERT网络的矩母函数的构造,并对其重要的性质做了详细的探讨;最后通过算例仿真,验证本文提出的不确定信息的GERT网络模型及其仿真算法能够有效的解决现实生活中不确定信息对GERT网络参数的影响,说明模型与算法正确可行。     

属性值为区间数的多属性决策对象排序研究

多属性决策问题的实质利用已有决策信息,通过一定方式对备选方案进行排序和择优。针对属性值为区间数的多属性决策对象排序问题,首先,提出决策对象优势关系这一概念,再次,得出决策对象的优势关系与其属性值两端点的实数值之和存在等价关系;最后,利用属性值为区间数的多属性决策实例对该算法进行了实例分析,并利用优势关系对决策对象进行排序并择优。     

浅析古代文学作品的多元文化形态——以汉魏六朝小说为例

古代文学史上的很多作品都具有多元文化形态的特征.汉魏六朝小说体现了地理博物学、史学和宗教的多元文化特点,又具有文学想象、叙事、写人等小说文体元素.这种多元文化形态的存在在各个方面制约了作品的文学性,其情节、形式乃至艺术手法往往成为某种文化形式或著述动机的附着因素.文学史写作应格外注意这一特征.