欧盟委员会影响评估机制述评

产生于规制改革背景下的欧盟委员会的影响评估机制在提升欧盟提案质量、促进决策和沟通交流,改善规制环境方面发挥了重要的作用,经过四年多的实践,该制度取得了显著成效,其在制度设计方面的诸多做法值得关注。不过该机制在实践运作时与其理想目标尚有一定的差距,需要进一步调整完善。     

Windows 2000 Server典型实验在VMware中的实现

Windows 2000 Server的实验需要专门的网络实验室,从而需要很大的设备投入。随着虚拟仿真技术在计算机网络中的应用,可以利用虚拟机软件构造虚拟计算机网络实验平台。VMware是一个功能强大的虚拟机软件,本文介绍VMware环境下Windows2000 Server的多个典型实验的实现原理与方法。     

基于B/S的机房动力和环境监控模拟实验系统

探讨基于B/S结构的网络化模拟实验室的构建,并以机房动力和环境监控系统为实验对象,用网际组态软件W ebAccess实现集数据采集、视频监控、安防消防等综合模拟实验平台的开发。     

电脑网络多媒体语言实验室的开发与利用

论述语言实验室的发展及其类型,重点介绍电脑网络多媒体语言实验室在教学中的作用以及在教学中要注意的问题,并提出一些相应的解决办法和具体措施。     

论欧共体反倾销退税制度

欧共体在反倾销立法之初就设立了反倾销退税制度,并在实践中不断加以改进,以纠正预期征收反倾销税可能造成的过度征税问题。了解欧共体反倾销退税制度,有利于我国完善反倾销退税制度。我国企业也应有效利用退税制度,维护自己和他国贸易伙伴的合法利益。     

汉语"NP+(VN+AP)"句式中"VN"的句法语用特点考察

主要通过与谓语位置上的述宾结构的比较,考察了“NP (VN AP)”句式中小主语位置上述宾结构“VN”的非时间性、非述谓性、无界性、指称性、话题性、非信息焦点性等句法语用方面的特点。     

信息共享空间的构建与创新服务——以河北工程大学图书馆为例

信息共享空间是近几年发展起来的一种新生事物，给传统的图书馆服务模式带来了严峻的挑战，以河北工程大学图书馆信息共享空间建设为例，分析了实体层和虚拟层两个层面建设的内容，介绍了信息共享空间的创新服务，并就信息共享空间的深层次服务提出了对策建议。     

Analysis of Regional Scale Risk of Whirling Disease in Populations of Colorado and Rio Grande Cutthroat Trout Using a Bayesian Belief Network Model

Introduction and spread of the parasite Myxobolus cerebralis, the causative agent of whirling disease, has contributed to the collapse of wild trout populations throughout the intermountain west. Of concern is the risk the disease may have on conservation and recovery of native cutthroat trout. We employed a Bayesian belief network to assess probability of whirling disease in Colorado River and Rio Grande cutthroat trout (Oncorhynchus clarkii pleuriticus and Oncorhynchus clarkii virginalis, respectively) within their current ranges in the southwest United States. Available habitat (as defined by gradient and elevation) for intermediate oligochaete worm host, Tubifex tubifex, exerted the greatest influence on the likelihood of infection, yet prevalence of stream barriers also affected the risk outcome. Management areas that had the highest likelihood of infected Colorado River cutthroat trout were in the eastern portion of their range, although the probability of infection was highest for populations in the southern, San Juan subbasin. Rio Grande cutthroat trout had a relatively low likelihood of infection, with populations in the southernmost Pecos management area predicted to be at greatest risk. The Bayesian risk assessment model predicted the likelihood of whirling disease infection from its principal transmission vector, fish movement, and suggested that barriers may be effective in reducing risk of exposure to native trout populations. Data gaps, especially with regard to location of spawning, highlighted the importance in developing monitoring plans that support future risk assessments and adaptive management for subspecies of cutthroat trout.     

An access network design problem with end-to-end QoS constraints

In this paper, we present an access network design problem with end-to-end quality of service (QoS) requirement. The problem can be conceptualized as a two-level hierarchical location-allocation problem on the tree topology with nonlinear side constraints. The objective function of the nonlinear mixed integer programming model minimizes the total cost of switch and fiber cable, while satisfying demand within the prescribed level of QoS. By exploiting the inherent structure of the nonlinear QoS constraints, we develop linearization techniques for finding an optimal solution. Also, we devise an effective exact optimal algorithm within the context of disjunctive constraint generation. We present promising computational results that demonstrate the effectiveness of the proposed solution procedure.     

充分利用网络技术全面提高会计控制质量

e7T中华财会网网络技术的发展对企业内部会计控制产生了深远的影响,文章从网络环境下内部会计控制呈现的新特点着手,分析了网络环境下内部会计控制系统所面临的风险,对存在的问题及其成因作了尝试性的探讨,提出了完善、加强内部会计控制的建议,以期达到提高网络环境下内部会计控制质量的目的。