论传统相关产品市场界定方法在互联网即时通讯软件相关产品市场界定的适用

随着互联网产业竞争的日益加剧,互联网企业滥用市场支配地位案件也层出不穷,而＂奇虎360诉腾讯QQ垄断案＂就是其中的典型案例。在该案中,腾讯QQ作为一种互联网即时通讯软件,其相关产品市场的界定是本案的争议焦点之一,也是难点之一。学界有观点认为,由于互联网行业中用户锁定效应、零价格、双边市场的存在,传统的反垄断相关产品市场界定方法无法有效界定本案的相关产品市场。通过对该案的具体案情、特征进行分析,传统的相关产品市场界定方法仍能在本案中适用,本案中腾讯QQ这一互联网即时通讯软件的相关产品市场是＂在线交流服务市场＂。     

Performing armchair roundoff analyses of statistical algorithms

Numerical stability is but one of many desirable properties which should be considered when designing statistical software. However, rigorous roundoff analysis is rarely done because it seems not worth the price; the influence of rounding error is usually of secondary importance, and the analysis is thought to be beyond the reach of all but a few specialists. This note discusses the role of roundoff analysis in the design of a statistical program and shows that new techniques sometimes make assessment of the effect of rounding errors no more difficult than the verification of other program properties.     

软件无线电中正交数字变频的DSP实现

介绍了软件无线电的概念及DSP基本原理,利用DSP实现软件无线电中的正交数字变频技术,给出了中频下变频的数字化实现的主程序.     

大连软件服务外包产业发展的现状、优势与建议

针对大连逐渐成为承接国际服务外包产业转移的重要基地的现状,指出大连具有发展软件外包的区位优势、人才优势、产业优势及政策优势,探讨大连目前发展软件外包产业存在的问题,提出提高大连本土企业竞争力、加强人才培养、改善投资软环境和提供政策支持等进一步发展大连软件外包的建议.     

创业能力情景模拟训练测评方法及系统研究

随着创业能力学习论逐渐被大家接受,创业者的创业能力如何训练提高和评价成为人们关注的焦点.通过资料综述确定成功创业者拥有的创业能力特征因子,即动机、品质、自我认知、价值观和深层次创业知识经验与技能,根据5种因子特征,在E-prime测评软件平台上分别采用内隐联想测试（IAT）、镶嵌图形测试和斯特鲁普效应测试（Stroop）,可以建立一种创业能力情景模拟综合测评方法,设计其测评系统程序.两组被试测评结果相关分析表明：创业动机不同的两组被试IAT测评分在置信度95％区间存在显著差异;创业能力不同的两组被试总测评分也存在显著差异.     

Statistical Microcomputing—Like it is

A statistical software package is a collaborative effort between a program's authors and users. When statistical analysis took place exclusively on mainframe computers, the entire statistical community was served by some three to six major packages, which helped to ensure that program errors would be quickly uncovered and corrected. The current trend toward performing statistical analysis on microcomputers has resulted in an explosion of software of varying quality, with more than 200 packages for the IBM PC alone. Since all of these programs are competing for the same base of knowledgeable users, the number of sophisticated users per package is dramatically less than for mainframe packages; the net result is that problems in any particular package are more likely to go unnoticed and uncorrected. For example, the most widely used shareware package contains major errors that should cause it to be rejected out of hand, and three best-selling packages analyze unbalanced two-factor experiments using an approximate technique originally developed for hand calculation. Several strategies are offered to help author and user reveal any problems that might be present in their software.     

Perceptions of Achievement and Achieving Peers in U.S. and Chinese Kindergartners

Two studies were conducted to examine perceptions about achievement and achiev‐ing peers in 190 U.S. and Chinese kindergartners. Children provided free‐narrative responses to story beginnings about an achieving protagonist in school settings. We found marked cultural differences. For achievement, U.S. children perceived more intellectual development, positive affects of the protagonist, and adult praise, where Chinese children perceived more social respect and their ability to help others. For lack of achievement in non‐achieving peers, U.S. children identified more negative affects, and Chinese children anticipated more negative reactions from adults. Moreover, although children in both cultures used non‐ability factors to explain achievement, Chinese children did so more consistently. Most strikingly, whereas Chinese children often expressed peer respect and desire to emulate the achieving protagonist, U.S. children frequently attributed peer negative reactions toward him or her. We interpret these differences as reflecting U.S. and Chinese cultural values regarding learning, achievement, and related self‐other perceptions.     

教育MIS维护的难点及管理对策

软件的维护是软件生存期持续时间较长、难度较大的一个重要阶段，教育ＭＩＳ的维护对教育管理有重大的作用．本文对教育ＭＩＳ维护的作用、难点进行总结性的阐述，并试图寻求一些解决教育ＭＩＳ维护困难的方法．     

邮政计算机网络风险防范与对策研究

阐述了邮政网络安全的内涵,阐述了该行业计算机网络风险的表现形式,并提出了相应的防范措施。