高职高专计算机软件人才培养模式探究

20世纪80年代中期以来,我国高职高专计算机软件人才培养无论在数量和质量方面都有了较大的进步,但在人才培养方式方面仍然有很多我们不能忽视的现象。认真研究高职高专计算机软件人才培养存在的问题,面临的挑战,努力摸索适合高职高专计算机软件人才培养模式,是高职高专要解决并完成的一项艰巨的任务。     

More than Typewriters,More than Adding Machines: Integrating Information Technology into Political Research

It has long been recognized that information technology (IT) can facilitate (or even permit) forms of empirical analysis unimagined just a generation ago. However, political scientists have generally experimented with only a narrow range of the possibilities the new technologies offer – easier writing, editing and communications processes, and more sophisticated statistical analyses. While these have undoubtedly increased productivity and rigor within the discipline, other IT applications have largely gone unnoticed. The growing pool of Computer-Aided Qualitative Data Analysis Software (CAQDAS) technologies presents researchers with new ways to conceptualize, perceive, and communicate their research, with the potential of revolutionizing social science research. This paper offers an overview of those IT and CAQDAS solutions with the most potential to facilitate political inquiry, and offers a series of practical steps by which technological novices might begin to apply the new technologies in their research. In closing, we discuss the benefits and perils of using such technology, and suggest the ways by which IT might strengthen current research techniques. The appendix catalogues several dozen applications for data acquisition, organization, processing, analysis and presentation, with contact and pricing information.     

PKPM运用于那吉电站副厂房结构设计所遇问题及对策

水工建筑物形式多变,结构复杂,目前国内外还没有研制出能综合、整体解决水工结构设计问题的成熟软件,因而只能借助工民建结构设计软件进行辅助设计。文章介绍了PKPM软件在那吉航运枢纽工程电站副厂房结构设计中的运用情况,着重介绍了应用PKPM软件遇到的问题及对策。     

Debugging the system: the impact of dispersion on the identity of software team members

This paper looks at the impact of dispersion of groups of software workers on team and organizational identification. The paper examines at two case studies of software organizations operating in Scotland. One case study is drawn from a software division of a large national telecommunications company, the other from a medium-sized indigenous software firm. Within each organization we examined groups of employees based within and outwith their employing organizations. Our results were broadly consistent with established work within other sectors in finding that the team largely replaced the organization as a focus for identification. However, we also found that there was no difference in the salience of organizational identification between dispersed employees and those based within their employing organization. For many employees the focus on the team as opposed to the organization was a way of reducing subjective uncertainty within a changing corporate environment. Finally, we established that it is team identification rather than organizational identification for software workers that is a greater determinant of affective outcomes such as job satisfaction. The results of this study impact upon contemporary theories of HRM, which promote the design of work systems in order to engender commitment to, and identification with, the organization.     

浅谈龙栖湾新区城市电网规划

电力工业是国民经济和社会发展中最重要的基础能源产业,是关系国计民生的基础产业,是世界各国经济发展战略中的优先发展重点。因此,在考虑科学、经济效益、安全可靠和用电质量的前提下,必须制定可行的城市电网发展方案。     

软件开发结构化处理初探

针对企业的结构性程序化处理,文章具体分析了软件开发的过程,并提出了程序化处理的方法。     

Selling shares to retail investors: auction vs. fixed price

We analyze the problem of selling shares of a divisible good to a large number of buyers when demand is uncertain. We characterize equilibria of two popular mechanisms, a fixed price mechanism and a uniform price auction, and compare the revenues. While in the auction truthful bidding is a dominant strategy, we find that bidders have an incentive to overstate their demand in the fixed price mechanism. For some parameter values we find that the fixed price mechanism outperforms the auction.     

Exact and asymptotic tests for possibly non-regular hypotheses on stochastic volatility models

We study the problem of testing hypotheses on the parameters of one- and two-factor stochastic volatility models (SV), allowing for the possible presence of non-regularities such as singular moment conditions and unidentified parameters, which can lead to non-standard asymptotic distributions. We focus on the development of simulation-based exact procedures–whose level can be controlled in finite samples–as well as on large-sample procedures which remain valid under non-regular conditions. We consider Wald-type, score-type and likelihood-ratio-type tests based on a simple moment estimator, which can be easily simulated. We also propose a C(α)-type test which is very easy to implement and exhibits relatively good size and power properties. Besides usual linear restrictions on the SV model coefficients, the problems studied include testing homoskedasticity against a SV alternative (which involves singular moment conditions under the null hypothesis) and testing the null hypothesis of one factor driving the dynamics of the volatility process against two factors (which raises identification difficulties). Three ways of implementing the tests based on alternative statistics are compared: asymptotic critical values (when available), a local Monte Carlo (or parametric bootstrap) test procedure, and a maximized Monte Carlo (MMC) procedure. The size and power properties of the proposed tests are examined in a simulation experiment. The results indicate that the C(α)-based tests (built upon the simple moment estimator available in closed form) have good size and power properties for regular hypotheses, while Monte Carlo tests are much more reliable than those based on asymptotic critical values. Further, in cases where the parametric bootstrap appears to fail (for example, in the presence of identification problems), the MMC procedure easily controls the level of the tests. Moreover, MMC-based tests exhibit relatively good power performance despite the conservative feature of the procedure. Finally, we present an application to a time series of returns on the Standard and Poor’s Composite Price Index.     

On nonrenewable resource oligopolies: The asymmetric case

We give a full characterization of the open-loop Nash equilibrium of a nonrenewable resource game between two types of firms differing in extraction costs. We show that (i) there almost always exists a phase where both types of firms supply simultaneously, (ii) when the high cost mines are exploited by a number of firms that goes to infinity the equilibrium approaches the cartel-versus-fringe equilibrium with the fringe firms acting as price takers, and (iii) the cheaper resource may not be exhausted first, a violation of the Herfindahl rule, that may be detrimental to social welfare.     

Semiparametric tests of conditional moment restrictions under weak or partial identification

We propose two new semiparametric specification tests which test whether a vector of conditional moment conditions is satisfied for any vector of parameter values θ₀. Unlike most existing tests, our tests are asymptotically valid under weak and/or partial identification and can accommodate discontinuities in the conditional moment functions. Our tests are moreover consistent provided that identification is not too weak. We do not require the availability of a consistent first step estimator. Like Robinson [Robinson, Peter M., 1987. Asymptotically efficient estimation in the presence of heteroskedasticity of unknown form. Econometrica 55, 875–891] and many others in similar problems subsequently, we use k-nearest neighbor (knn) weights instead of kernel weights. The advantage of using knn weights is that local power is invariant to transformations of the instruments and that under strong point identification computation of the test statistic yields an efficient estimator of θ₀ as a byproduct.