基于可达性的用户最优动态交通配流模型研究

以多种已有模型为基础，建立了动态配流流量细化原则，并依据这一原则，在避免估算路段走行时间的情况下构造了一个改进的新模型．该模型的解释性强，具有全局收敛性，并考虑了距离不同带来的可达性的影响．在对该模型最优解条件的充要性进行说明的同时，对新模型的择路机理也予以了推证．     

动结式的事件结构和句法生成

在语言使用过程中,动结式逐渐被语法化成表示致使—结果的特定语法形式,被语法化了的不是具体的词汇单位,而是一种语法结构或构式,即任何两个没有语义关联的动词只要并列出现在一个句子里就会形成致使—结果的语义关系。动结式里的两个动词各自表示一个事件,每个事件都能表述为一个独立的句子,通过移位和融合等句法操作合并在一起,临时构成独立的动词单位,从而在句法上把分别表示不同事件的两个句子合并为一个,实现表达的简约性。因为题元指派首先在底层结构完成,而动结式是表层句法操作的结果,所以动结式的语义关系仍需回到合并前的两个句子里确认。这种追根溯源的底层结构解释,清晰地揭示了动结式表层所呈现的复杂的句法和语义关系,是一种对于动结式的句法派生和形成机制提出的全新看法。     

Minimum power assignment in wireless ad hoc networks with spanner property

Power assignment for wireless ad hoc networks is to assign a power for each wireless node such that the induced communication graph has some required properties. Recently research efforts have focused on finding the minimum power assignment to guarantee the connectivity or fault-tolerance of the network. In this paper, we study a new problem of finding the power assignment such that the induced communication graph is a spanner for the original communication graph when all nodes have the maximum power. Here, a spanner means that the length of the shortest path in the induced communication graph is at most a constant times of the length of the shortest path in the original communication graph. Polynomial time algorithm is given to minimize the maximum assigned power with spanner property. The algorithm also works for any other property that can be tested in polynomial time and is monotone. We then give a polynomial time approximation method to minimize the total transmission radius of all nodes. Finally, we propose two heuristics and conduct extensive simulations to study their performance when we aim to minimize the total assigned power of all nodes. The author is partially supported by NSF CCR-0311174.     

金融创新背景下个体网络借贷犯罪行为的认定

个体网络借贷发展迅速,但监管缺失导致了该行业的畸形发展,刑事风险攀升。《关于促进互联网金融健康发展的指导意见》首次对个体网络借贷做出规定,意义重大。个体网络借贷中债权转让和平台担保两种模式游走于罪与非罪的模糊地带,在相关立法和司法解释出台前,对这两种平台经营模式,刑法应该保持谦抑,谨慎介入。     

Indirect membership function assignment based on ordinal regression

In many fuzzy sets applications, fuzzy membership functions are commonly developed based on empirical or expert knowledge. The equation of a membership function is usually determined somewhat arbitrarily. This paper explores a novel membership function design method based on ordinal regression analysis. The estimated thresholds between ordinal measurement categories are applied to calculate the intersection points between fuzzy sets. These intersection points are further applied to determine the equations of the membership functions. Information distortion due to empirical guess can thus be reduced and more latent information in the fuzzy responses can therefore be captured. A case study investigating the relationship between foster mothers’ satisfaction and the foster time and information provided has been conducted in this research. The applicability and effectiveness of the proposed membership function assignment approach have been demonstrated through several case studies.     

Exact confidence regions for species assignment based on DNA markers

Assignment of individuals to correct species or population of origin based on a comparison of allele profiles has in recent years become more accurate due to improvements in DNA marker technology. A method of assessing the error in such assignment problems is présentés. The method is based on the exact hypergeometric distributions of contingency tables conditioned on marginal totals. The result is a confidence region of fixed confidence level. This confidence level is calculable exactly in principle, and estimable very accurately by simulation, without knowledge of the true population allele frequencies. Various properties of these techniques are examined through application to several examples of actual DNA marker data and through simulation studies. Methods which may reduce computation time are discussed and illustrated.     

社会工作介入退役军人安置工作的思考

将社会工作的理念、方法、技巧介入到军人退役安置工作,有助于促进安置问题的解决。     

新时期推进生态文明建设的战略任务

生态文明是不同于工业文明时期的一种有利于人与自然协调发展,经济与社会全面进步的新型文明形态。大力推进生态文明建设是新时期赋予我们的神圣使命,是实现全面建设小康社会奋斗目标的新要求。     

对债权让与通知传统理论的反思

我国学界长期以来关于债权让与通知的传统观点有检讨的必要.让与通知并非是债权让与合同的生效要件,而是对债务人产生拘束力的要件.让与通知是使债权实际发生移转的事实行为,而非准法律行为.在债权让与对债务人生效要件这一问题上,所谓的"自由主义"实际上是对德国法相关规定的误解.债权让与中的"对抗"只能是针对交易第三人;对债务人只存在是否发生效力的问题.因此,我国学界长期存在的"债权让与合同有效成立,债权让与即生效只是不能对抗债务人"的说法应予以纠正.     

On asymptotic non-normality of null distributions of mrpp statistics

Severe departures from normality occur frequently for null distributions of statistics associated with applications of mulLi-response permutation procedures (MRPP) for either small or large finite populations. This paper describes the commonly encountered situation associated with asymptotic non-normality for null distributions of MRPP statistics which does not depend on the underlying multivariate distribution. In addition, this paper establishes the existence of a non-degenerate underlying distribution for which the null distributions of MRPP statistics are asymptotically non-normal for essentially all size structure configurations. It is known that MRPP statistics are symmetric versions of a broader class of statistics, most of which are asymmetric. Because of the non-normality associated with null distributions of MRPP statistics, this paper includes necessary results for inferences based on the exact first three moments of anv statistic in this broader class (analogous to existing results for MRPP statistics).