一种自适应斜坡补偿电路

基于CMOS工艺设计了一种能够自动调节补偿斜率的斜坡补偿电路。该电路可以跟随输入和输出信号的变化,相应地给出适当的斜坡补偿量,不仅使得峰值电流模式BOOST变换器可以稳定工作,而且可以避免补偿不当的现象,保证变换器有足够快的瞬态响应。仿真结果表明该电路产生的斜坡补偿信号的精度可以达到83%以上。     

受控核聚变的一种新途径──低能注入式磁盖势阱约束法受控核聚变

提出了磁盖势阱（ＭＬＰＷ）一种静电装置,该装置是在球形静电势阱的外围加上磁盖而构成的,可用于受控核聚变．通过建立磁盖势阱中带电粒子的运动方程并取单粒子谐振子近似以及运用自洽场的统计方法,球形聚变炉内大量带电粒子的集体行为被计算机所研究和模拟．由于使用了电场与磁场的联合约束,与单独的磁约束或惯性约束受控核聚变相比,所需达到的技术指标将有所改善,工程技术上的难度也会有所降低     

Conditional entropy,entropy density,and strong law of large numbers for generalized controlled tree-indexed Markov chains

In this paper, we first introduces a tree model without degree boundedness restriction namely generalized controlled tree T, which is an extension of some known tree models, such as homogeneous tree model, uniformly bounded degree tree model, controlled tree model, etc. Then some limit properties including strong law of large numbers for generalized controlled tree-indexed non homogeneous Markov chain are obtained. Finally, we establish some entropy density properties, monotonicity of conditional entropy, and entropy properties for generalized controlled tree-indexed Markov chains.     

陕西省义务教育经费“校财局管”模式研究

2006年以来，陕西省按照中央部署，对义务教育“校财局管”模式进行了积极有益的探索。从校财局管的“局”是教育局还是财政局看，“校财局管”在我省有三种模式：教育局主导的？‘校财局管”模式、财政局主导的“校财局管”模式和混合型的“校财局管”模式；从是否实行国库集中支付来看，分为两种模式即实行国库集中支付的“校财局管”模式和非国库集中支付的“校财局管”模式。陕西省义务教育经费“校财局管”模式的完善，应按照中央关于教育资金管理的相关规定，对义务教育“校财局管”的管理、使用权限与责任进行科学界定。对目前正在运行的教育局主导的“校财局管”模式从两个方面进行改造：一是对接国库中支付模式，二是实行远程核算。     

国有控股上市公司股权激励机制研究

我国国有控股上市公司实施经营者股权激励机制有其理论基础与实践效用支持。文章通过对国有控股上市公司实施股权激励的本土环境考察,认为要实现经营者股权激励机制的预期效果,强化国有控股上市公司监督机制,制定科学的经营业绩考核指标和恰当的业绩考核标准,是股权激励机制实施的关键,同时应充分发挥中国特色社会主义优势,采取精神激励等多种辅助激励手段。     

Birth preference in women undergoing treatment for childbirth fear: A randomised controlled trial

Background

Childbirth fear is the most common underlying reason for requesting a caesarean section without medical reason. The aim of this randomised controlled study was to investigate birth preferences in women undergoing treatment for childbirth fear, and to investigate birth experience and satisfaction with the allocated treatment.

The Effects of a Computer Network on Pediatric Pain and Anxiety

SUMMARY

The objective of this study was to test the impact of an enhanced version of STARBRIGHT World (SBW2)-a private computer network for hospitalized children. The impact of SBW2 was assessed with a series of 44 replicated single system designs. Utilizing an ecological momentary assessment approach, self-reports were obtained regarding children's perceptions of their pain intensity, pain aversive-ness and anxiety. The results from the single system designs were aggregated using meta-analysis. Children experienced significantly less pain intensity, pain aversiveness, and anxiety in the SBW2 condition. These findings provide evidence regarding the effectiveness of SBW2 and demonstrate the utility of employing meta-analysis with single system designs.     

Ethics of research design

Discussions of ethical issues in research involving human subjects most usually provoke concerns about valid informed consent procedures. However, considering the recognized limitations of informed consent, arguably the way a study is designed is a more consequential concern for subject well‐being. This paper summarizes ethical issues in the design of clinical research, with reference to historic and current guidelines. Special attention is given to randomized clinical trials (RCTs) and psychiatric research.     

水利——定国安邦之大策

从我国历史上的立国——大禹治水创立夏朝 ;治国——“水则载舟 ,水则覆舟”;卫国——以水代兵为本国政治服务等三个方面论述了水与国家政治的密切关系     

20世纪初上海城市客运业与官商互动模式的嬗变

上海城市区域不断扩大,导致城市人口形成空间活动固定模式,产生了现代公共交通方式。华界现代公共交通基本由民间社会集资兴办,民族交通企业创办了华界地区现代公共交通。在民间资本式微的情况下,上海市政府公用局尝试性地运用政府的独特优势,整合相关社会资源,积极介入区域公共交通的建设与发展之中,取得了初步成效。同时公用局坚持华界公共交通“以公营为宜”的主张,加强对商办交通企业监管,引起了监管方式的争执。