构建高校图书馆与系资料室之间的新型关系

从新世纪的新要求出发 ,对高校图书馆与资料室之间的关系进行了新的探讨 ,提出自己的想法 ,意在充分发挥高校图书馆与系资料室在教学科研中的作用     

串联稳压器基准误差放大电路的设计

针对串联型稳压器,设计了一种应用于串联型稳压器具有自建基准的新型误差放大电路。该电路具有构思巧妙,结构优化,易于集成及较高的开环增益,共模抑制比及交流特性的优点。通过验证,实测数据与仿真结果基本一致。     

BAYESIAN SUBSET SELECTION AND MODEL AVERAGING USING A CENTRED AND DISPERSED PRIOR FOR THE ERROR VARIANCE

This article proposes a new data‐based prior distribution for the error variance in a Gaussian linear regression model, when the model is used for Bayesian variable selection and model averaging. For a given subset of variables in the model, this prior has a mode that is an unbiased estimator of the error variance but is suitably dispersed to make it uninformative relative to the marginal likelihood. The advantage of this empirical Bayes prior for the error variance is that it is centred and dispersed sensibly and avoids the arbitrary specification of hyperparameters. The performance of the new prior is compared to that of a prior proposed previously in the literature using several simulated examples and two loss functions. For each example our paper also reports results for the model that orthogonalizes the predictor variables before performing subset selection. A real example is also investigated. The empirical results suggest that for both the simulated and real data, the performance of the estimators based on the prior proposed in our article compares favourably with that of a prior used previously in the literature.     

德国应用技术大学的教学体系及其借鉴意义

德国应用技术大学(Fachhochscule)具有专业性、应用性、地域性等特征。文章研究了德国应用技术大学的学制、教学目标、课程体系及其实践教学的特点，并从教学安排、课程体系及实践教学三个方面与我国的情况进行了对比，在此基础上分析总结了其成功的经验及对我国普通高等工科院校教学改革的借鉴意义。     

自由心证的借鉴与吸收

大陆法系各国在刑事诉讼法中普遍采用的自由心证制度 ,多年来被误认为是法官可以随心所欲判案的资产阶级工具。今天 ,我们透过自由心证产生的社会背景 ,仔细探究它的现实价值的哲学基础 ,多方论证了自由心证决不是资产阶级所特有。作为文化遗产 ,它的科学性完全可以被社会主义国家所接受 ,并为之提供更加完善的证据判断标准。因此 ,我国的诉讼立法有必要借鉴自由心证。     

两相交流伺服电机动态性能的研究

对于两相交流电机的速度伺服系统,分析在幅值控制时系统的机械特性与调节特性,提出了影响两相交流伺服电机动态性能的因素是系统的机械时间常数及增益系数的变化。为了防止因机械时间常数及增益系数的变化而引起的动态特性变差,采用一种简易跟随模型参考自适应控制方法,通过模型与自适应机构的调节作用,改善两相交流伺服电机系统的动态特性和控制精度。计算机仿真结果表明,电机的动态持性良好。     

数字图书馆建设三部曲——电子科技大学图书馆建设实例

在对数字图书馆的定义进行归纳的基础上,提出了人才建设是图书馆建设的第一需要、构建数字图书馆必须要有一个良好的网络环境和资源是图书馆一切服务工作的基础三个观点,并应用于电子科技大学数字图书馆的建设中。同时,对于数字图书馆建设所涉及的虚拟参考咨询、资源整合等前沿性问题进行了探讨。     

谈分级显性意义假说对反语中的认知参照点的解释力

本文运用Giora的分级显性意义假说分析了Langacker的认知参照点理论，并对反语中的认知参照点进行分析，得出反语中的认知参照点也是层级突显的结论，为反语的理解提供一个新的视角。     

Summary of the Workshop on Issues in Risk Assessment: Quantitative Methods for Developmental Toxicology

This report summarizes the proceedings of a conference on quantitative methods for assessing the risks of developmental toxicants. The conference was planned by a subcommittee of the National Research Council's Committee on Risk Assessment Methodology ⁴ in conjunction with staff from several federal agencies, including the U.S. Environmental Protection Agency, U.S. Food and Drug Administration, U.S. Consumer Products Safety Commission, and Health and Welfare Canada. Issues discussed at the workshop included computerized techniques for hazard identification, use of human and animal data for defining risks in a clinical setting, relationships between end points in developmental toxicity testing, reference dose calculations for developmental toxicology, analysis of quantitative dose-response data, mechanisms of developmental toxicity, physiologically based pharmacokinetic models, and structure-activity relationships. Although a formal consensus was not sought, many participants favored the evolution of quantitative techniques for developmental toxicology risk assessment, including the replacement of lowest observed adverse effect levels (LOAELs) and no observed adverse effect levels (NOAELs) with the benchmark dose methodology.     

物资采购综合评价指标体系质量控制模型应用研究

本文依据非序列多层次目标准则建立了物资采购综合评价指标体系,应用模型参考思想构建了物资采购综合评价指标体系的质量控制模型及其目标函数,按照采购项目管理的运作程序对各个阶段的采购质量做了相应的评价,最后运用实例对以上讨论进行了定量化的分析。通过计算得到的数量指标,我们可以有效评价和控制物资采购工作,以期提高采购质量、节省经费开支。