大学计算机基础课程分层教学的探索与实践

大学计算机基础课程是我校非计算机专业学生的公共必修课,教学对象分布全校各个专业,授课面广,而学生基础水平差异较大。本文通过在计算机基础教学中的实践经验,着重探讨了应用型本科院校在计算机基础教学中,如何针对学生的各方面差异采用分层教学模式以提高教学质量。     

证券公司自建柜台市场发展的可行性与路径

证券公司自建柜台市场作为我国多层次资本市场底层市场的定位,已被明确为我国资本市场发展的方向.借助于地方政府的强有力支持,证券公司自建柜台市场区位优势明显,成本容易控制,服务灵活,业务空间广阔.证券公司柜台市场建设可分两步走,先支持有条件的证券公司建设单独的柜台市场,再适时推动建立证券公司间市场.     

方波型电压源逆变器与二阶梯波电压源逆变器的比较研究

本文报告了对方波型电压源逆变器与二阶梯波电压源逆变器主要参数DF和THD的研究结果.比较研究的结果表明二阶梯波逆变器的输出电源质量明显优于方波逆变器.同时也给出了详尽的计算公式和计算结果.     

ON OPTIMIZING MULTI-LEVEL DESIGNS: POWER UNDER BUDGET CONSTRAINTS

This paper derives a procedure for efficiently allocating the number of units in multi‐level designs given prespecified power levels. The derivation of the procedure is based on a constrained optimization problem that maximizes a general form of a ratio of expected mean squares subject to a budget constraint. The procedure makes use of variance component estimates to optimize designs during the budget formulating stages. The method provides more general closed form solutions than other currently available formulae. As such, the proposed procedure allows for the determination of the optimal numbers of units for studies that involve more complex designs. A method is also described for optimizing designs when variance component estimates are not available. Case studies are provided to demonstrate the method.     

Main and Interaction Effects of Women's Education and Status on Fertility: The Case of Tanzania

The analysis is based on individual 1996 TDHS data combined withaggregate data from the 1988 census and the 1991/1992 TDHS. When varioussources of spuriousness are taken into account, it is found that giving awoman more education reduces her fertility much less than suggested byunivariate tabulations of the total fertility rate. Expansion of primaryeducation contributes to only a slightly higher age at first birth, and theeffect on higher-order birth rates is not significant. Changes in post-partum insusceptibility outweigh those in fertility desires and use ofmodern contraception among women not wanting an additional child.Secondary school enrollment influences fertility more markedly, inparticular because of a later first birth. Effects of women's status areestimated in models for actual fertility as well as fertility desires, post-partum insusceptibility and contraceptive use, using up to six macro- ormicro-level indicators. All significant effects suggest that empowerment ofwomen will tend to push fertility down, net of education. The significantinteractions between women's status and education point in differentdirections, but a majority of them indicate that education has the mostpronounced effect on fertility in the more egalitarian regions and amongwomen with relatively high individual status.     

多级离散模糊神经网络稳定性的优化算法

针对模糊集理论在建模中对变化的外部环境适应能力差,以及基本神经网络模型不容易获得模糊集之间关系等问题,提出了一个具有基本模糊推理系统“IF-THEN”规则的多级离散模糊神经网络模型。分析了该模型的基本稳定性条件,并使用硬C均值聚类方法获得数据集之间的关系,采用遗传算法优化了该模型。最后通过计算机仿真验证了该模型的有效性。     

分布式多层架构及组件技术与气象法制管理平台建设

网络化时代,采用B/A/S多层架构是IT界公认的主流应用模式,是网络管理信息化系统开发运行最佳的选择方案,可以提供上至企业级、下至小型网络的网络计算模型和运行环境,适用于开发和部署多层体系结构的应用。组件技术是应用级别的集成技术,将应用软件分解成为一个个独立的单元,将软件开发过程转变成为类似于＂搭积木＂的搭建过程。采用分布式多层架构和组件技术可实现快速构建、快速开发应用系统。以江苏省气象法制管理平台为例,分析气象法制管理平台的技术路线所使用的组件技术和平台运行管理思路,阐述应用集成与实现。通过气象法制管理全过程的信息化规范化管理,使气象法制管理从立法、执法、社会管理到行政复议、行政诉讼的各个流程规范化、透明化,确保行政权力阳光运行。     

基于集对分析的群决策灵敏度分析

在集对分析理论的同、异、反概念基础上，对一类常见的多层群决策问题给出了相应的模型与处理方法，进行了参数灵敏度分析，得到了有意义的结果，有关结论和方法具有实际可操作性。     

Creative placemaking and the NEA: unpacking a multi-level governance

The role of the National Endowment for the Arts (NEA) in shaping the arts and cultural sector is not well understood. In this paper, I focus on the development of the governance of the creative placemaking policy to unpack the complexity of the role of the NEA. Governance is used to refer to collective action designed to achieve a general interest through different actors from both the government and civic society. I use intergovernmental relations theory to capture governance dynamics in creative placemaking. In particular, I focus on three main tools developed by the NEA to spur a multi-level governance: research, grants, and partnerships. What emerges is that the role of the NEA in the development of the creative placemaking policy is multifaceted as it includes offering and leveraging funding, shaping the conversation, providing insights, and spurring collaborations. These actions create a multi-level governance based on a dynamic exchange between national and local governments, and the involvement of a variety of actors from civil society.     

基于挣值管理有效模型的挣值动态预测研究

项目挣值管理是公认的项目管理工具,它整合了项目成本与进度 ,通过偏差分析为项目经理提供了定量的项目状况信息,为预测项目的最终成本和进度提供了有效的解决办法。依托挣值管理有效模型并在此基础之上进行改良,采用多层次模糊综合评判与数量化方法探析动态的挣值预测模型。以项目过程风险识别和分析为导向,根据预测值分析项目的健康状况和集成化管理改进。