试述网络广告的法律规范

通过剖析目前我国网络广告中存在的种种问题 ,指出如果不对其加以认真克服 ,势必制约网络广告业的发展 ,并提出了可通过立法及加强监管的方式来促进中国网络广告业的健康发展     

The Luxembourg Wealth Study – A cross-country comparable database for household wealth research

The paper describes the Luxembourg Wealth Study (LWS), an international project launched in 2003 by the Luxembourg Income Study and by institutions from Canada, Cyprus, Finland, Germany, Italy, Norway, Sweden, the United Kingdom, and the United States. The aim of the project is to assemble and to harmonise existing micro-data on household wealth, in order to provide a sounder basis for comparative research on household net worth, portfolio composition, and wealth distributions.Eva Sierminska is the LWS project co-ordinator, Andrea Brandolini and Timothy Smeeding are the LWS project leaders. Further information on the LWS project is available at .     

喷锚网支护技术在基坑围护中的应用

以某综合楼为例 ,详细介绍喷锚网支护新技术 ,并与传统围护方案作了比较 .     

网络文化的冷思考

网络文化作为网络时代产生的新兴文化范式,以其交互、共享、虚拟现实性等特点迎合了信息时代快节奏的工作方式和生活方式,给人们的工作和生活带来了极大的方便,还对传统文化带来了深刻的影响,但同时也为社会环境、文化建设带来了诸多不容忽视的负面影响。     

The Relationship Between Private Safety Nets and Economic Outcomes Among Single Mothers

This article examines the relationship between private safety nets and economic outcomes among 2,818 low‐income single mothers in three U.S. counties in the 1990s. I define private safety nets as the potential to draw upon family and friends for material or emotional support if needed. Using a combination of survey and administrative records data collected for the National Evaluation of Welfare‐to‐Work Strategies, I find that human capital deficits, depressive symptoms, and low self‐efficacy are associated with having less private safety net support, suggesting that social network disadvantages compound individual‐level disadvantages. I also find that mothers with strong private safety nets worked more, earned more, and were less reliant on welfare compared with mothers with more meager private safety nets.     

Reliability Analysis Based on the Losses from Failures

The conventional reliability analysis is based on the premise that increasing the reliability of a system will decrease the losses from failures. On the basis of counterexamples, it is demonstrated that this is valid only if all failures are associated with the same losses. In case of failures associated with different losses, a system with larger reliability is not necessarily characterized by smaller losses from failures. Consequently, a theoretical framework and models are proposed for a reliability analysis, linking reliability and the losses from failures. Equations related to the distributions of the potential losses from failure have been derived. It is argued that the classical risk equation only estimates the average value of the potential losses from failure and does not provide insight into the variability associated with the potential losses. Equations have also been derived for determining the potential and the expected losses from failures for nonrepairable and repairable systems with components arranged in series, with arbitrary life distributions. The equations are also valid for systems/components with multiple mutually exclusive failure modes. The expected losses given failure is a linear combination of the expected losses from failure associated with the separate failure modes scaled by the conditional probabilities with which the failure modes initiate failure. On this basis, an efficient method for simplifying complex reliability block diagrams has been developed. Branches of components arranged in series whose failures are mutually exclusive can be reduced to single components with equivalent hazard rate, downtime, and expected costs associated with intervention and repair. A model for estimating the expected losses from early-life failures has also been developed. For a specified time interval, the expected losses from early-life failures are a sum of the products of the expected number of failures in the specified time intervals covering the early-life failures region and the expected losses given failure characterizing the corresponding time intervals. For complex systems whose components are not logically arranged in series, discrete simulation algorithms and software have been created for determining the losses from failures in terms of expected lost production time, cost of intervention, and cost of replacement. Different system topologies are assessed to determine the effect of modifications of the system topology on the expected losses from failures. It is argued that the reliability allocation in a production system should be done to maximize the profit/value associated with the system. Consequently, a method for setting reliability requirements and reliability allocation maximizing the profit by minimizing the total cost has been developed. Reliability allocation that maximizes the profit in case of a system consisting of blocks arranged in series is achieved by determining for each block individually the reliabilities of the components in the block that minimize the sum of the capital, operation costs, and the expected losses from failures. A Monte Carlo simulation based net present value (NPV) cash-flow model has also been proposed, which has significant advantages to cash-flow models based on the expected value of the losses from failures per time interval. Unlike these models, the proposed model has the capability to reveal the variation of the NPV due to different number of failures occurring during a specified time interval (e.g., during one year). The model also permits tracking the impact of the distribution pattern of failure occurrences and the time dependence of the losses from failures.     

基于Petri网的企业高新技术产业化进入战略研究

讨论企业高新技术进入战略的类型，并运用Ｐｅｔｒｉ网理论对企业制订高新技术进入战略的过程进行了描述与分析。结果表明，Ｐｅｔｒｉ网理论在战略管理领域具有潜在的应用价值。     

论数字档案的技术支持

数字档案具有信息资源的数字化、信息组织方式的网状化、内容传输的网络化和服务范围的扩大化等方面的特征 ,这些特征是通过一定的技术手段来实现的。相关的技术支持可归结为五大类 :档案内容的创建与获取、存储与管理、检索、传送与发布、安全控制。     

网收敛的非标准特征在微积分中的应用

在非标准分析的扩大模型下,利用网收敛的非标准特征来刻画微积分中数列、函数的极限以及定积分的定义,并给出了若干结论及其证明。     

社会对建立保障制度的双重要求

我国社会保障制度严重滞后,建构完善的社会保障制度是体制改革成功的重要保证。本文从西方各国历史中社会保障制度的得失出发,探讨了社会对安全网的客观要求和社会保障可能导致的社会风险;在分析各国保障模式的基础上,提出我国建立社会保障制度的模式目标。