成岩作用及阶段对碎屑岩储层孔隙演化的控制

碎屑岩储层孔隙演化受有机-无机成岩作用的影响，在埋藏成岩阶段，有机质成熟过程中脱羧作用产生的有机酸对碎屑岩中的方解石、长石等溶蚀所形成的次生扎隙，是深部储层中高孔渗段发育的重要原因，随埋深增加，成岩阶段由早-晚发展，有机质由未成熟-成熟演化，在此期间，储层孔隙经历了消亡与新生的发展过程。在同一盆地中，不同层位储层经历的最大埋深如果相近，所处成岩阶段也相近，其孔隙演化史亦趋于相似;反之，同一层位的储层所处的最大埋深不同，成岩阶段不同，其孔隙特征也就不同。     

BATHTUB-TYPE CURVES IN RELIABILITY AND BEYOND

Finding optimal, or at least good, maintenance and repair policies is crucial in reliability engineering. Likewise, describing life phases of human mortality is important when determining social policy or insurance premiums. In these tasks, one searches for distributions to fit data and then makes inferences about the population(s). In the present paper, we focus on bathtub‐type distributions and provide a view of certain problems, methods and solutions, and a few challenges, that can be encountered in reliability engineering, survival analysis, demography and actuarial science.     

在实践中考察社会主义

实践是社会生活的本质,是人类生存和发展的根本条件。在实践中正确认识和理解、继承和发展科学社会主义,就是要强调社会主义实践的阶段性、过程性和层次性,强调要用发展着的马克思主义指导新的实践,与时俱进,正确处理社会主义本质与社会主义实践之间的辨证关系。     

社会主义初级阶段人的不全面性及其克服

由于社会主义初级阶段还不是那种已为人的全面发展提供了现实的社会生产力和高度文明的基础的社会阶段,还处于“以物的依赖性为基础的人的独立性”的历史阶段,人的发展仍然具有不全面性。大力发展生产力,努力营造良好的社会环境,发展文化教育,加强道德建设,是克服和消除人的发展不全面性的有效途径。     

基于期间收益的企业并购谈判模型

借鉴协商和讨价还价理论,建立了企业并购谈判模型,利用博弈论工具对模型进行了求 解. 同时,针对一些并购谈判需要时间较长的现实情况,对目标企业在谈判期间具有期间收益 的并购谈判模型进行了一些初步的研究.     

空气中多种醛酮液相色谱法侧定的研究

本文研究了空气中多种醛酮的测定。目前国内仅对空气中甲醛的测定研究较多,国外报导的方法需用萃取、浓缩等一系列前处理过程,方法麻烦,易引入杂质造成污染。本文报导的方法系采用2.4—二硝基苯肼的甲醇强酸溶液吸收空气中醛酮直接注入液相色谱仪中进行分离测定。研究表明:本法分离效果好,重复性好,方法简便,速度快,测定的精密度和准确度符合微量分析误差的要求。     

Early stopping in seamless phase I/II clinical trials

In recent years, seamless phase I/II clinical trials have drawn much attention, as they consider both toxicity and efficacy endpoints in finding an optimal dose (OD). Engaging an appropriate number of patients in a trial is a challenging task. This paper attempts a dynamic stopping rule to save resources in phase I/II trials. That is, the stopping rule aims to save patients from unnecessary toxic or subtherapeutic doses. We allow a trial to stop early when widths of the confidence intervals for the dose-response parameters become narrower or when the sample size is equal to a predefined size, whichever comes first. The simulation study of dose-response scenarios in various settings demonstrates that the proposed stopping rule can engage an appropriate number of patients. Therefore, we suggest its use in clinical trials.     

Adaptive designs for single‐arm phase II trials in oncology

Clinical phase II trials in oncology are conducted to determine whether the activity of a new anticancer treatment is promising enough to merit further investigation. Two‐stage designs are commonly used for this situation to allow for early termination. Designs proposed in the literature so far have the common drawback that the sample sizes for the two stages have to be specified in the protocol and have to be adhered to strictly during the course of the trial. As a consequence, designs that allow a higher extent of flexibility are desirable. In this article, we propose a new adaptive method that allows an arbitrary modification of the sample size of the second stage using the results of the interim analysis or external information while controlling the type I error rate. If the sample size is not changed during the trial, the proposed design shows very similar characteristics to the optimal two‐stage design proposed by Chang et al. (Biometrics 1987; 43:865–874). However, the new design allows the use of mid‐course information for the planning of the second stage, thus meeting practical requirements when performing clinical phase II trials in oncology. Copyright © 2012 John Wiley & Sons, Ltd.     

试论中华民族多元一体格局发展的阶段划分

本文通过解析多元一体格局的内涵及其演变,探寻多元一体格局发展的轨迹,将中华民族多元一体格局的发展划分为四个阶段.从中看出,多元一体格局、中华民族(中国境内)、统一多民族中国三者之间虽然范畴不同,却三位一体,多元一体格局本身的形成、稳定与危机,同中华民族、中国统一多民族国家的命运息息相关.     

语段理论下汉语存现句的生成机制研究

存现句是一种特殊的句式,具有跨语言的性质,一般认为其下位句型包括存在甸与隐现句。对汉语存现句相关问题的研究也一直是国内外生成语言学者研究关注的热门话题,通过对汉语存现句的研究进行回顾,发现以往对汉语存现句的研究大多是在管约论框架下进行的,研究的主要问题包括以下几个方面：1．存现句的生成机制;2．句首处所名词组的语法地位;3．存现动词的性质;4．动词后名词组的赋格问题。其中存现句的生成机制问题是最为根本的问题,生成语言学者对此也是各持己见。本文尝试在语段理论的框架下,对汉语存现句的推导生成做尝试性探究,力图寻求汉语存现句统一的生成机制。