相控阵雷达T/R组件的效费比随机petri网维修模型

针对T/R组件在备件库存、保障模式以及维修策略方面的特点,建立了两级维修保障体制下相控阵雷达的效费比随机Petri网模型。首先对随机Petri网性能存在的不足进行分析,并对其进行改进,引入抑制弧和全局时间,建立了多部件条件下不同连接方式的系统Petri网模型;其次以多部件当中的k/N系统连接方式为基础,建立了相控阵雷达系统的Petri网模型并进行实例验证;最后对模型中的使用可用度和单位时间维修费用进行分析。实例仿真表明,该Petri网模型可信度高,可以分析基层级和基地级初始备件数量、维修策略参数(m,NG)对系统保障效能的影响,克服了传统解析方法建模的局限,更加贴合实际。     

Short sales restrictions and the security market line

A reformulation of the CAPM is derived by taking account of short-sales restrictions on both risky and safe assets. The induced security market line is shown to be consistent with the empirical security market lines of various researchers.     

针对广东地区进口机械加工设备安全性能的研究

对广东检验检疫局辖区内的进口机械加工设备进行了专项检测和调研。根据检测结果,从不同侧面分析了进口机械加工设备存在的问题以及解决方法,为今后的进口机械加工设备检验监管提供了技术依据,也为国内广大机械加工设备制造企业提供了借鉴。     

WCDMA-GSM七频段手机射频前端的简化设计

通过分析使用SP9T天线开关实现WCDMA-GSM双模七频段的典型手机射频电路,提出了一种 采 用SP4T天线开关的简化设计方案。该设计在保证性能的前提下,极大地降低了成本和器件面 积。测试结果表明,该方案各项射频指标,包括发射功率、灵敏度、PVT、频率误差、相位 误差、调制频谱和开关频谱等,全部符合3GPP的通信标准,完全能够实现WCDMA和GSM两种移 动通信制式的7个频段的通信能力。该方案已成功应用于实际的手机产品当中。     

上市公司非经常性损益问题研究

根据沪市上市公司2010年年报数据,本文采用非经常性损益贡献率指标,利用描述性统计方法,分析了不同类型T族公司利用非经常性损益调节净利润的程度和手段,认为监管制度对T族公司利用非经常性损益调节净利润具有较强的导向作用,受"扣除非经常性损益后的净利润为正值"的限制,"摘帽"公司更注重通过提升主营业务收益来实现扭亏,而未受非经常性损益限制的"摘星"和恢复上市公司则更多地通过做多非经常性收益项目、增加净利润来扭亏,政府财政补贴、资产出售和债务重组仍然是它们做多非经常性收益、实现扭亏的重要手段。     

Designing the Best: A Review of Effective Teaching and Learning of Design and Technology

The role of Design and Technology (D &; T) in schools in England is changing. As from September 2002, D &; T will no longer be compulsory from age 14, but students will have a statutory entitlement to opt to study the subject. These proposed changes have renewed policy-makers' interest in a subject, which was first introduced into the National Curriculum in England and Wales in 1990. It provides the immediate context for a review of the literature published in English on Design and Technology commissioned by the Department of Education and Skills. Four databases were searched: the British Education Index (BEI), Educational Resources Information Centre (ERIC), PsychInfo, and Current Educational Research in the UK (CERUK). This article draws from the findings of the review and focuses in particular on two questions: How can D &; T be delivered effectively and what enhances learning and teaching in D &; T? The reviewers conclude that the factors which enhance effective learning and teaching of D &; T include: adequate equipment and accommodation, appropriate curriculum content and teaching methods, up-to-date continuing professional development for teaching and management support to allow teachers to implement innovative practices. In addition, they suggest a research agenda, which could inform future research in D &; T.     

质量保证体系在勘察设计单位的作用

以设计院实施GB/T19001-2000-ISO9001:2000标准质量管理体系实例,来说明质量管理的重要性。     

我国村镇银行可持续发展模式与策略抉择

作为微观金融创新方式,村镇银行对我国培育多元竞争性农村金融市场体系有着重要现实意义。文章揭示了现阶段我国村镇银行运行中的突出问题及可持续发展的制约因素,借鉴孟加拉乡村银行GB模式,设计了适合我国国情的村镇银行发展的优化模式,提出现阶段促进村镇银行可持续发展的配套对策。     

创新业务流程打击金融诈骗

针对目前电信金融诈骗犯罪往往采用通过银行转账,ATM分散取款的作案手段,提出了在银行业务流程上增加主、副账户和在转账交易中引入T+1限制的办法堵住销赃渠道,可以有效遏制此类犯罪案件的滋生。在此基础上,提出捕捉和监控疑似犯罪的交易信息,建立金融数据溯源平台,从而在技术上为报案侦查和追回损失提供了支撑条件,震慑金融诈骗犯罪的企图。最后讨论了基于数据抽取平台的金融数据溯源系统的技术架构。