试析布哈林国民经济综合平衡发展理论

列宁逝世以后，布哈林继续坚持和捍卫列宁的新经济政策思想，并结合俄国的实际，针对当时苏联国民经济发展中出现的一系列问题，总结过去经济建设中的经验教训，系统地阐发自己的观点，从而形成了关于国民经济综合平衡发展的比较全面系统的理论。他认为，要使国民经济持续健康发展，必须尊重客观经济规律，重视市场调节的作用，使工业和农业、重工业和轻工业、农业内部、积累和消费之间保持综合平衡。在建设有中国特色社会主义的今天，重温布哈林的国民经济综合平衡发展理论，无疑会给我们以很好的教益和启迪。     

Robustness of a Class of Partial Diallel Cross Designs to the Unavailability of a Complete Block of Observations

Complete and partial diallel cross designs are examined as to their construction and robustness against the loss of a block of observations. A simple generalized inverse is found for the information matrix of the line effects, which allows evaluation of expressions for the variances of the line-effect differences with and without the missing block. A-efficiencies, based on average variances of the elementary contrasts of the line-effects, suggest that these designs are fairly robust. The loss of efficiency is generally less than 10%, but it is shown that specific comparisons might suffer a loss of efficiency of as much as 40%.     

“一卡在手，走遍校园”——邯郸职业技术学院校园一卡通建设方案

“校园一卡通”系统将多项管理职能融为一体,实现“一卡在手,走遍校园”总体目标,不但提高了管理效率,降低了成本,方便了教师和学生,而且计算机管理工作也得到了进一步的深入完善。文章详细介绍了邯郸职业技术学院一卡通系统的设计目标、功能,以及系统组织结构。     

Factor analysis for ranked data with application to a job selection attitude survey

Summary.  Factor analysis is a powerful tool to identify the common characteristics among a set of variables that are measured on a continuous scale. In the context of factor analysis for non-continuous-type data, most applications are restricted to item response data only. We extend the factor model to accommodate ranked data. The Monte Carlo expectation–maximization algorithm is used for parameter estimation at which the E-step is implemented via the Gibbs sampler. An analysis based on both complete and incomplete ranked data (e.g. rank the top q out of k items) is considered. Estimation of the factor scores is also discussed. The method proposed is applied to analyse a set of incomplete ranked data that were obtained from a survey that was carried out in GuangZhou, a major city in mainland China, to investigate the factors affecting people's attitude towards choosing jobs.     

Assessing accuracy of a continuous screening test in the presence of verification bias

Summary.  In studies to assess the accuracy of a screening test, often definitive disease assessment is too invasive or expensive to be ascertained on all the study subjects. Although it may be more ethical or cost effective to ascertain the true disease status with a higher rate in study subjects where the screening test or additional information is suggestive of disease, estimates of accuracy can be biased in a study with such a design. This bias is known as verification bias. Verification bias correction methods that accommodate screening tests with binary or ordinal responses have been developed; however, no verification bias correction methods exist for tests with continuous results. We propose and compare imputation and reweighting bias-corrected estimators of true and false positive rates, receiver operating characteristic curves and area under the receiver operating characteristic curve for continuous tests. Distribution theory and simulation studies are used to compare the proposed estimators with respect to bias, relative efficiency and robustness to model misspecification. The bias correction estimators proposed are applied to data from a study of screening tests for neonatal hearing loss.     

我国银行卡市场发展的若干问题及对策

银行卡作为商业银行的一种复合型金融工具在现代银行竞争中的作用日益显著 ,我国拥有着巨大的并且快速发展的银行卡市场 ,开发和完善我国的银行卡市场可以作为商业银行迎接加入 WTO挑战和与国际同行竞争的突破口。本文着重论述我国银行卡市场的现状和存在的问题 ,并据此提出整合经营、采用积分制等具有针对性的建议     

被害人的上诉权再探

本文在已有的研究基础上 ,从审判权的特性、程序公正、诉讼模式等方面对公诉案件被害人应该享有上诉权进行了分析     

我国旅游产业发展的障碍分析

基于对中国旅游产业结构和管理体制现状的认识 ,根据有关理论和方法对阻碍中国旅游产业进一步发展的原因进行了分析 ,将其归纳为认识障碍、管理障碍及立法障碍 ,在此基础上 ,提出了清除障碍的设想并予以论证     

Ka波段二倍频器的研究与设计

利用反向并联二极管对的二倍频原理,设计了Ka波段二倍频器。用高级设计系统ADS设计软件包的射频设计软件对二倍频器的电路进行了模型设计和仿真分析,并对设计出的二倍频器进行了整体优化,研制了Ka波段的二倍频器;在整个Ka波段内的变频损耗为11.2±1.8 dB,减少了设计的理想模型与实际参数的偏差。     

国产梁式引线器件平面集成混频器

介绍鳍线单平衡混频器电路的设计。混频器使用国产梁式引线混频二极管。混频器在31～37GHz的频率范围内,变频损耗小于10dB,最小值为7.2dB。