Use of Technology in Delivering Career Services Worldwide

The authors review the trends in the use of computers in the delivery and support of career guidance and counseling identified at the symposium International Perspectives on Career Development. The papers presented emphasized that 20th‐century computer‐based systems continue to be used, mainly delivered via the World Wide Web. These systems are enhanced through audio, video, graphics, strategies to provide needs assessment, and support by cybercounselors or expert system design. The papers also revealed a new trend: the use of elegant Web sites to store and search immense libraries of resources needed by professionals and clients and to facilitate communication and collaboration among professionals in cyberspace. Concerns, issues, and resources related to many areas, including the readiness of clients to use computer‐based systems, were also raised; existing sources of guidelines are noted.     

论求真务实

求真务实是辩证唯物主义和历史唯物主义一以贯之的科学精神,是解放思想、实事求是、与时俱进党的思想路线的核心内容,是党的优良传统和共产党人应该具备的政治品格。     

教学评估对我国高校的引导作用

高校教学工作评估作为一种制度化的逻辑性力量,确保教育内部规律与外部规律在高校运行和发展过程中得到有机融合,使高校作为一种专业教育机构和人的特殊实践活动方式的本质特征得到彰显;引导高校回归教育本质,凸显育人的本体性功能,这将改变长期以来我国高等教育领域教育内部规律得不到尊重、教育本质特征被忽视的状况,给新时期我国高校带来一系列的新变化.     

抗战时期中共执政陕甘宁边区研究述评

抗战时期中共执政陕甘宁边区的成功实践,把陕甘宁边区建设成了抗日民主政治的模范区、新经济生活的模范区、建设先进文化的楷模,为中共全国范围内的执政做了有益的尝试,积累了丰富的经验。学术界对中共执政陕甘宁边区的研究主要涉及民主建政、发展经济、建设新文化、当代意义等方面。     

Silphids in urban forests: Diversity and function

Many ecologists have examined the process of how urbanization reduces biological diversity but rarely have its ecological consequences been assessed. We studied forest-dwelling burying beetles (Coleoptera: Silphidae)—a guild of insects that requires carrion to complete their life cycles—along an urban-rural gradient of land use in Maryland. Our objective was to determine how forest fragmentation associated with urbanization affects (1) beetle community diversity and structure and (2) the ecological function provided by these insects, that is, decomposition of vertebrate carcasses. Forest fragmentation strongly reduced burying beetle diversity and abundance, and did so far more pervasively than urbanization of the surrounding landscape. The likelihood that beetles interred experimental baits was a direct, positive function of burying beetle diversity. We conclude that loss of burying beetle diversity resulting from forest fragmentation could have important ecological consequences in urban forests.     

试论我国物流企业发展战略联盟的必要性

根据现代物流的发展趋势以及我国物流企业的发展现状 ,通过对几种物流企业扩张方式的比较分析 ,得出我国物流企业发展战略联盟的必要性     

HEAVY-TAILED-DISTRIBUTED THRESHOLD STOCHASTIC VOLATILITY MODELS IN FINANCIAL TIME SERIES

To capture mean and variance asymmetries and time‐varying volatility in financial time series, we generalize the threshold stochastic volatility (THSV) model and incorporate a heavy‐tailed error distribution. Unlike existing stochastic volatility models, this model simultaneously accounts for uncertainty in the unobserved threshold value and in the time‐delay parameter. Self‐exciting and exogenous threshold variables are considered to investigate the impact of a number of market news variables on volatility changes. Adopting a Bayesian approach, we use Markov chain Monte Carlo methods to estimate all unknown parameters and latent variables. A simulation experiment demonstrates good estimation performance for reasonable sample sizes. In a study of two international financial market indices, we consider two variants of the generalized THSV model, with US market news as the threshold variable. Finally, we compare models using Bayesian forecasting in a value‐at‐risk (VaR) study. The results show that our proposed model can generate more accurate VaR forecasts than can standard models.     

Real nonparametric regression using complex wavelets

Summary.  Wavelet shrinkage is an effective nonparametric regression technique, especially when the underlying curve has irregular features such as spikes or discontinuities. The basic idea is simple: take the discrete wavelet transform of data consisting of a signal corrupted by noise; shrink or remove the wavelet coefficients to remove the noise; then invert the discrete wavelet transform to form an estimate of the true underlying curve. Various researchers have proposed increasingly sophisticated methods of doing this by using real-valued wavelets. Complex-valued wavelets exist but are rarely used. We propose two new complex-valued wavelet shrinkage techniques: one based on multiwavelet style shrinkage and the other using Bayesian methods. Extensive simulations show that our methods almost always give significantly more accurate estimates than methods based on real-valued wavelets. Further, our multiwavelet style shrinkage method is both simpler and dramatically faster than its competitors. To understand the excellent performance of this method we present a new risk bound on its hard thresholded coefficients.     

中美陪审制度比较研究

通过中美陪审制度在历史、文化传统方面的比较,找出陪审制度发挥不同作用的根源是文章的主旨。美国陪审制深受个人主义文化传统的影响,弥补了法律形式合理性的缺陷,而中国陪审制由于缺乏陪审所需要的历史文化传统和相应的制度,不能有效发挥作用。