新疆开放口岸特征分析与发展方略

新疆在对外贸易中的战略位置十分重要,其开放口岸有着辐射扇面范围广、季节开放口岸和常年开放口岸并存、公路、铁路、航空运输类型并举和贸易功能多样化的特点。但口岸同时也存在着基础设施建设薄弱、口岸管理体制不健全、受对方国家政策影响大和口岸发展不均衡的问题。提出应完善基础设施建设、强化管理体制建设、建立对外协调机制、加强口岸发展规划工作,以期全面加快口岸建设和发展。     

对贵州社会保障项目的制度重构

主要论述完善贵州社会保障体系的系统设计,提出养老保险与社会福利重组、合作医疗与乡村医生社会保障的重组、农村地区扶贫与＂以工代赈＂的重组、社会救助与社会福利的重组、完善灾难救助制度五条具体路径,从而为完善贵州社会保障体系提供制度保障     

类矩形双肢钝体涡致振动和气动抑振机理

针对具有类矩形双肢钝体断面拱肋的大跨度拱桥在风洞试验过程易出现大幅涡激振动问题,沿拱肋模型表面进行动态风压同步测量及基于POD算法的本征气动力荷载分布模式分解,获得了涡振发生时对于周期性涡激力具有最大贡献的气动力荷载作用位置,初步揭示出此类断面涡激动发生时的局部气动力荷载作用机制。以上海卢浦大桥和肇庆西江特大桥此类具有双肢钝体断面拱桥为工程实例,结合涡激气动力沿拱肋周向时空气分布特征,提出并以二维悬吊节段模型风洞试验验证了拱肋断面多种有针对性的气动控制措施;结合实际桥梁拱肋的三维空间效应,利用全桥气弹模型     

制度供给不足与农民的收入和负担问题

经调查和粗略估算后发现,农民收入增长缓慢、货币收入负化问题确实存在.同时研究表明,农民收入增长问题与农民负担问题是互为因果、紧密相关的两个问题,均源于制度供给不足.改善当前农民收入状况,促进收入再增长,根本的途径是农村和农业制度创新、技术创新以及增加投入.目前最紧迫的任务也是立竿见影的措施是减轻农民负担.     

Moment‐Independent Sensitivity Analysis Using Copula

In risk assessment, the moment‐independent sensitivity analysis (SA) technique for reducing the model uncertainty has attracted a great deal of attention from analysts and practitioners. It aims at measuring the relative importance of an individual input, or a set of inputs, in determining the uncertainty of model output by looking at the entire distribution range of model output. In this article, along the lines of Plischke et al., we point out that the original moment‐independent SA index (also called delta index) can also be interpreted as the dependence measure between model output and input variables, and introduce another moment‐independent SA index (called extended delta index) based on copula. Then, nonparametric methods for estimating the delta and extended delta indices are proposed. Both methods need only a set of samples to compute all the indices; thus, they conquer the problem of the “curse of dimensionality.” At last, an analytical test example, a risk assessment model, and the levelE model are employed for comparing the delta and the extended delta indices and testing the two calculation methods. Results show that the delta and the extended delta indices produce the same importance ranking in these three test examples. It is also shown that these two proposed calculation methods dramatically reduce the computational burden.     

关于三分Cantor集的结构的一些新结论

旨在采用代数的方法来研究三分Cantor集的结构特点。主要结果除了给出三分Cantor集的代数构造外还定义了仿四进位；结合代数构造、拓扑构造以及仿四进位分别给出并证明了三分Cantor集及其余集的结构公式，从而改进了已有的结论。     

李土司先世辨正

本文主要对土族李土司家谱中关于其先世为李晋王的传说加以考证,认为李土司家族传说的晋王即是曾五次出征河湟的西夏晋王察哥,李土司初祖赏哥为晋王察哥子孙,所任之职为西夏齐王遵顼大都督府,出镇鄯州,夏封鄯善王,后世遂误传为元代之事。     

“高等数学”教学中如何处理教材内容

“高等数学”课程是大学各专业的基础理论课,是学生学习后续课程的基础。如何提高课堂教学效果,培养学生创新意识、创新能力是每位高等数学老师都会遇到并关注的问题。根据多年的教学实践,从多个角度多个视角给出了在“高等数学”课程教学中,通过对教材内容的合理处理,进而得以解决这一问题,达到提升“高等数学”课程教学质量的目的。     

基于生态理念的北京市新城发展模式

运用系统论的方法,通过分析北京市生态新城发展模式的构成要素及相应的子系统,以及分析在新城发展层次划分基础上的新城发展运行机制,研究构建基于生态理念的北京市新城发展模式。该模式是政治、经济、社会和环境各子系统之间的相互作用与影响、协调和谐运行,通过新城发展的内在机制、外在机制以及动力机制的作用,实现从新城规划建设到新城运行维护再到新城更新进步各个发展层次新城内部的生态系统的优化,以及新城与中心城之间相互促进与共同发展的模式。     

Distribution of the two‐sample t‐test statistic following blinded sample size re‐estimation

We consider the blinded sample size re‐estimation based on the simple one‐sample variance estimator at an interim analysis. We characterize the exact distribution of the standard two‐sample t‐test statistic at the final analysis. We describe a simulation algorithm for the evaluation of the probability of rejecting the null hypothesis at given treatment effect. We compare the blinded sample size re‐estimation method with two unblinded methods with respect to the empirical type I error, the empirical power, and the empirical distribution of the standard deviation estimator and final sample size. We characterize the type I error inflation across the range of standardized non‐inferiority margin for non‐inferiority trials, and derive the adjusted significance level to ensure type I error control for given sample size of the internal pilot study. We show that the adjusted significance level increases as the sample size of the internal pilot study increases. Copyright © 2016 John Wiley & Sons, Ltd.