沉积岩中深部隧道围岩层状破坏模型

研究发现在岩体基本力学介质中，当沉积板状（层状）岩体的结构和性状符合某些特征时，其力学机理从总体上符合板壳结构的特征。根据这一结论，建立了沉积层状结构岩体隧道围岩破坏模型。采用该模型具体分析了深部直立沉积层状岩体中的地下工程围岩在其长度远大于直立高度的情况下岩体中的层状破裂问题。并根据地下结构失稳概率分析原理，建立了直立沉积层状围岩稳定的极限状态方程。     

TM2型机车主变压器设计改进

以TM2型机车主变压器为例,从接地和绝缘材料两方面对目前我国电力机车主变压器中存在的一些问题进行了分析,并提出了相应的解决措施。     

交通拥挤收费原理与对策研究

交通拥挤收费(Congestion Pricing)作为现代化城市交通需求管理(TDM)的有效措施之一,虽然在实践中颇多微词,但是其在减少交通吸引、控制交通流量、提高车速与路段通行能力、提高能源利用效率及提高路网的运行效率等方面效果显著,并且在缓解交通拥堵压力的同时带来了财政副收入。从经济学原理出发,利用边际成本定价理论、收入再分配理论以及公共产品和产权经济学理论分析了交通拥挤收费的本质、理论依据,最后提出交通拥挤收费的相关建议和措施。     

论传播发展的八个维度

传播发展一方面受到社会整体发展水平的制约,另方面又能促进整个社会的全面进步.传播发展的内涵丰富多彩,要考察特定国家新闻传播的发展,有八个维度是必须予以关注的:相对独立的政治地位;开放多元的媒介结构;较少的报道禁忌与较大的监督空间;经济自给;媒介具有一定的公信力;从业者的职业意识和专业精神;媒介结构合理与较高的普及水平;受众信息需求的最大满足.由于传播发展是动态的历史过程,象征传播发展的具体指标和考察传播发展的维度,当然不会固定不变.     

城市交通拥挤的社会成本分析初探

交通拥挤的社会成本可分为生产成本、使用成本、时间耗费成本及外部成本,本文在定性分析的基础上,对使用成本和时间耗费成本做了定量分析,给出了计算公式,并通过对大连市西南路某路段在拥挤时段的调查,计算出了居民出行时间成本的损失和城市交通使用成本的损失,这一结果可以推广到整条道路或区域路网,从而为城市交通的良性发展和减少经济损失等方面提供了有效的理论依据。     

Why do you care what other people think? A qualitative investigation of social influence and telecommuting

The effect of social interactions on decision-making is a topic of current interest in the travel behavior literature. These interactions have been investigated primarily from an intra-household perspective, but increasingly too in other types of social settings. In the case of interactions within a workplace, it has been suggested that the decision to telecommute may have some important social components. Previous research has concentrated on social isolation, and the effect on job satisfaction of qualitatively different (i.e., telecommunications-mediated) relationships with managers and colleagues. A topic that remains unexplored is the way social norms, in effect the influence of other people’s behavior, may influence the decision to adopt telecommuting. In this paper we set to investigate, within a qualitative framework, the role of social contact in the process of acquiring information on, and making decisions about, telecommuting. The results indicate that social contact does play a subtle but non-trivial role in the adoption and continuation process, and offer some insights about the importance of the social dimension, institutional set-up, and how they interact to influence the decision to telecommute.     

基于数据挖掘的传媒信息安全系统

随着网络的发展，越来越多的广播电视信息由模拟转为数字，传媒信息安全问题迫在眉睫，是亟待解决的问题．本文采用文本分类技术，设计了一种新的文本分类模型，并应用该传媒信息安全系统，从而减少系统的误报率和漏报率，实验结果表明，该算法具有较高的分类精度和效率．     

One manufacturer's approach to improving jet transport fuel efficiency

In the face of rapidly escalating costs of aircraft fuel, since the early 1970s, the aerospace industry has embarked on a program of measures to reduce fuel consumption. This article describes an integrated set of measures which have been undertaken by Lockheed‐California to improve the fuel requirements of the Tristar, a wide‐bodied three engine medium to long range aircraft. Measures include operational changes, improvements to maintenance practices, long term hardware modifications and technological advances.     

Work and home location: Possible role of social networks

This research explores to what extent people’s work locations are similar to that of those who live around them. Using the Longitudinal Employer-Household Dynamics data set and the 2000 decennial census, we investigate the home and work locations of different census block residents in the Twin Cities (Minneapolis-St. Paul) metropolitan area. Our aim is to investigate if people who share a residence neighborhood also share work locations to a degree beyond what would be explained by distanhe observed patterns is the role neighborhood level and work place social networks play in locating jobs and residences respectively.     

A coupled multi-agent microsimulation of social interactions and transportation behavior

Choice set formation, location and mode preferences, coordinated scheduling, alternative utility valuations, and shared mobility resources are among the many activity-travel issues hypothesized to be significantly influenced by traveler interdependencies. Empirical evidence lags theory, particularly about the geography of social networks. A simulation tool is presented to let the experimenter construct and test hypothetical interdependencies between geography, socially-linked travelers, and activity-travel choices. The exploratory tool is integrated in the Multi-Agent Transportation Simulation Toolbox (MatSim-T). Initially, any social network can be constructed and embedded in geography. It can remain static, or be adapted to the travel patterns of the agents. The interactions and exchanges between agents influencing socializing and/or travel behavior can be defined in substance and in time/space. The reward for socializing or being socially linked can be varied. Finally, the co-dependence of social factors and travel behavior can be studied. This paper introduces the model and presents verification results which illustrate the coupling of extremely simplified socializing assumptions and travel behavior.