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121.
建立了贵州省三施高速公路近临高压输电铁塔抗滑桩爆破施工的有限元分析三维数值模型,模拟了各抗滑桩依次爆破施工下输电铁塔的振动速度时程变化,结果表明输电铁塔塔基测点的三向爆破振动速度随着爆源水平距离增大有减小的趋势.随着爆破位置、爆破深度、爆破距离的变化,塔基各测点速度随时间的变化趋势差异较大.爆破中输电塔各测点速度最大值出现的方向为抗滑桩与输电塔直线相连水平投射方向,其次是输电塔各测点的竖直方向,垂直于水平投射方向另一水平方向最小. 相似文献
122.
123.
Nan Feng Minqiang Li Desheng Wu Fuzan Chen Jin Tian 《Enterprise Information Systems》2016,10(7):751-770
Information sharing across organisations is critical to effectively managing the security risks of inter-organisational information systems. Nevertheless, few previous studies on information systems security have focused on inter-organisational information sharing, and none have studied the sharing of inferred beliefs versus factual observations. In this article, a multiagent collaborative model (MACM) is proposed as a practical solution to assess the risk level of each allied organisation’s information system and support proactive security treatment by sharing beliefs on event probabilities as well as factual observations. In MACM, for each allied organisation’s information system, we design four types of agents: inspection agent, analysis agent, control agent, and communication agent. By sharing soft findings (beliefs) in addition to hard findings (factual observations) among the organisations, each organisation’s analysis agent is capable of dynamically predicting its security risk level using a Bayesian network. A real-world implementation illustrates how our model can be used to manage security risks in distributed information systems and that sharing soft findings leads to lower expected loss from security risks. 相似文献
124.
The paper compares free trade with autarky in an asymmetric multi‐country world under Cournot competition with constant returns to scale and linear demand. We derive respective conditions under which free trade will hurt a country's consumers, benefit its firms, induce it to export, increase its output and raise its welfare. We show that these conditions are linked in a clear order, with one implying the next. We further demonstrate that free trade can reduce world total output and total consumer surplus as well as world welfare. Along the way, we correct several oversights in the literature. 相似文献
125.
随着经济社会的不断发展和进步,人们更加重视食品安全。当前,常规的食品安全检测技术已无法满足实际检测工作的需求,所以食品检测中开始陆续使用各种新设备、新技术,其中生物检测技术凭借迅速、准确、安全等优势开始在食品安全检测中得到广泛运用,且逐渐成为食品安全监管中的主要力量。 相似文献
126.
由于我国的工商管理涉及的地域较为广泛,而且业务流程极其复杂繁琐,尤其是基层工商管理部门,面对的营业户口不仅数量巨大,而且区域也十分广泛。所以,这就对我国的工商管理信息系统提出了较高的要求,需要为工商管理部门提供完善而科学的管理。因此,可以通过GIS来进行电子信息管理。文中就如何设计出基于GIS的工商管理信息系统进行了讨论。 相似文献
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128.
2010年12月3日,中共中央政治局会议提出:2011年中国将实行积极的财政政策和稳健的货币政策.持续逾两年的"适度宽松"的货币政策基调发生转向,商业银行的政策环境面临较大改变,这对转型中的商业银行将带来新的机遇和挑战. 相似文献
129.
This paper examines the use of go‐shop provisions in M&A. We find that go‐shop deals tend to have higher deal premiums and receive more competing bids while the length of the go‐shop period does not affect deal premium and competition. Also, deals are less likely to be completed when a go‐shop provision is included and when the go‐shop length is longer. However, go‐shops have no effect on the completion of high premium deals. We also find that the presence of a go‐shop provision leads to a positive market reaction to deal announcements. Overall, our findings support the proposition that go‐shops reflect the efforts of target managers to fulfill the Revlon duties in the form of a post‐signing market check, which is consistent with stewardship theory. 相似文献
130.
The water industry is in great need of further large investments to address existing severe water shortages worldwide which requires the participation of private sector investors. This industry is heavily infrastructure based and is therefore saddled with fixed assets-in-place or illiquid assets. This exposes the industry to what is termed as ‘illiquidity risk’, and hence, investors in this industry should be compensated for bearing this risk with an appropriate return premium (i.e. extra return). In this study, we provide evidence as to whether illiquidity risk indeed significantly affects returns in this industry. We examine the case of all 76 firms that compose the five major global water indices. After controlling for other factors that impact on returns, our results suggest that asset illiquidity is positively associated with stock returns. Specifically, water firms with a larger proportion of illiquid assets-in-place are observed to have greater stock returns than those with a smaller proportion of illiquid assets. Our results have important implications for the financing of water-related projects particularly those which involve the participation of investors from the private sector. 相似文献