转向架存放库货架结构设计及有限元分析

为满足转向架检修的需求,在转向架检修库中特别设置一个立体存放库。由于国内目前没有转向架的立体存放库,故采用升降横移式立体车库的方式对转向架存放库货架结构进行了设计。通过有限元方法对货架进行分析与计算,在保证货架承载强度、变形和稳定性的要求下,将原来的壁厚8 mm的钢板改为6 mm,从而减轻了货架的质量,满足了仓储的需要。     

An intelligent service matching method for mechanical equipment condition monitoring using the fibre Bragg grating sensor network

Due to the advantages of being able to function under harsh environmental conditions and serving as a distributed condition information source in a networked monitoring system, the fibre Bragg grating (FBG) sensor network has attracted considerable attention for equipment online condition monitoring. To provide an overall conditional view of the mechanical equipment operation, a networked service-oriented condition monitoring framework based on FBG sensing is proposed, together with an intelligent matching method for supporting monitoring service management. In the novel framework, three classes of progressive service matching approaches, including service-chain knowledge database service matching, multi-objective constrained service matching and workflow-driven human-interactive service matching, are developed and integrated with an enhanced particle swarm optimisation (PSO) algorithm as well as a workflow-driven mechanism. Moreover, the manufacturing domain ontology, FBG sensor network structure and monitoring object are considered to facilitate the automatic matching of condition monitoring services to overcome the limitations of traditional service processing methods. The experimental results demonstrate that FBG monitoring services can be selected intelligently, and the developed condition monitoring system can be re-built rapidly as new equipment joins the framework. The effectiveness of the service matching method is also verified by implementing a prototype system together with its performance analysis.     

新疆油气资源税改革全国推广的借鉴意义

已经运行半年多的新疆油气资源税改革使油气企业的税负增加,地方财政增收效应显著,初显税改的目标定位。但在试点中暴露出来的计税依据不规范、综合减征率递减以及内外资企业税负不统一的问题,亟需在全面推开资源税改革方案时予以综合考虑,除此之外,还应适当提高现行税率,处理好资源税收入在各级政府间的分配,并在现行体制下同步推进资源税费改革,以此设计具体的改革方案和路径。     

市场结构内生变迁与产能过剩治理

本文构建了一个市场需求不确定性情况下的企业动态性模型,发现当行业发展前景相对确定但市场需求存在较大不确定性时,高效率企业为规避风险会谨慎投资,从而为大量低效率企业留下市场空间,市场集中度和产能利用率较低。而随着行业成熟和不确定性减少,优势企业会不断扩大规模,逐步淘汰劣势企业,最终形成较合理的市场结构和产能利用率。因而,我国一些重要行业在早期发展阶段出现大量企业涌入的现象,不应片面视为市场失灵,也不能一概归因于地方政府的产业扶持政策。本文以我国家电和钢铁产业为例,说明治理产能分散和过剩问题,根本办法是建立和维护公平竞争的市场环境,让市场内生的产能集中机制更好地发挥作用,而不是"以扭曲去对付扭曲"。     

国际油价冲击与中国的经济增长——基于非对称关系视角的分析

本文基于季度数据，引入非对称协整模型，考察国际油价与中国经济增长的动态关系，并鉴于油价波动对不发达经济体可能的冲击，还测度了油价的不确定性并探析其对经济增长的影响，结果表明：（1）从短期来看，国际油价变化是国内经济增长的单向Granger原因，“中国因素”对全球油价变化的影响尚不明显；（2）从长期来看，国际油价和经济增长具有非对称协整关系，油价上涨对经济的影响明显大于油价下跌所产生的效应；（3）国际石油市场存在正反馈交易行为，导致油价波动在油价上涨时表现更加明显。油价不确定性在短期内对经济增长存在负面影响，长期中则不会显著影响经济增长。以上结果意味着必须高度重视石油安全问题，加强油价波动预警与风险管理系统。     

电子审计体系研究

国家十二五规划纲要提出建设和完善电子审计体系。本文通过对电子审计体系的研究,提出了电子审计体系的顶层设计、总体规划和效能目标三个特性,以及电子审计体系在国家电子政务体系中的地位和作用;提出了审计业务信息化、审计管理数字化、电子审计标准化和审计队伍信息化的电子审计体系框架;提出了电子审计体系的功能演进,包括从重点查处违纪违规问题到重点促进公共财政管理规范的转变、从重点关注财政财务收支审计到重点关注国家经济安全审计评价的转变,从传统审计方式到现代审计方式的转变。     

The Impact of Occupational Community on the Quality of Internal Control

Senior executives in major corporations have drawn attention in recent years for a range of unethical activities. Despite a rise in measures to protect against such lapses, executives still make decisions whether or not to comply with reporting standards, best practices, industry norms and legislation. The prior literature in this area addresses individual characteristics of decision makers and social networks between executives and boards of directors, but to this point has largely overlooked group dynamics of the executive team. Our study addresses this gap and examines the relationship between an occupational community of top executives and the quality of internal control. We construct a unique measure for the executive occupational community based on CEO and CFO’s joint tenure. Our findings show that the number of years of CEO/CFO’s joint tenure is significantly and negatively associated with internal control weakness, suggesting that the longer the executive relationship, the lower the likelihood of internal control weakness. Our study indicates that the presence of an occupational community contributes to better internal control.     

Cognition of disaster risk in a tourism community: an agricultural heritage system perspective

Cognition of risk is the first step in reducing disaster damage and losses. In this study, risk cognition in the Hani Rice Terraces, the core tourism attraction in Yuanyang County, Honghe Prefecture, Yunnan, China, is analyzed based on field survey and participatory geographic information system (GIS). The results show that tourism communities have cognition of risk; are more sensitive to hazards (especially drought); have more severe potential damage and losses from hazards; and also have more enthusiasm to adapt to disaster risk, when compared with a non-tourism community. On disaster vulnerability maps, the tourism communities identified the unique “Forest – Village – Terrace - River” landscape while the non-tourism community only recognized the terrace and the village as the main elements affected by hazard. Also, the tourism communities had deeper understandings of drought, flash floods and landslide disaster risks. A conceptual model based on “Pressure – State – Response” relationships is put forward to explore the situation in which, in the tourism community, terraces have a greater variety of functions and enhanced values resulting in the spatial expansion of hazard effects.     

海南高新技术产业发展探讨

实现海南产业超前发展战略,大力发展高新技术产业是重要的突破口.海南高新技术产业发展已进入了迅速成长并日益成熟的发展阶段,呈现良好的发展态势和广阔的发展前景,同时也面临着严峻的挑战,其发展需要建立健全高新技术产业目标体系、高新技术产业管理体系、高新技术产业发展体系、高新技术产业扶持体系.     

保险公司诉讼与诉讼预期相关性研究

近年来我国保险诉讼案件增势不减,有的历经一审、二审,有的还要再审。从媒体披露的结果看,保险公司无论作为原告还是被告,似乎都是胜少败多。本文通过对北京某人寿保险股份有限公司2005年～2008年诉讼、诉讼预期数据的实证调研,探讨保险公司诉讼预期是否实现及实现程度,在此基础上提出更理性、更具可操作性的建议。