全封闭单托辊皮带输送机创新的优化设计

通过对全封闭单托辊输送机的创新的优化设计,使得此设备在原有的设计基础上,在清扫器、单托辊、靴型料斗、头部耐磨衬板和轴承测温系统等方面进行进一步优化,使之在使用方面更加可靠,维护保养更加方便,实现了该设备的使用性能的又一次飞跃。     

宋代长江下游圩田开发与水事纠纷

两宋时期,长江下游地区圩田开发在以往的基础上进一步迅速发展。人们在圩田开发利用过程中,因为争水、排涝、抢占河湖滩地,以及对陂湖的恣意破坏等因素,产生了诸多水事纠纷。这些纠纷主要有地主与农民之间、官府与民间以及圩际之间等类型。面对各种水事纠纷,两宋政府采取了相应的对策,并取得一定的成效。     

股权分置改革后全流通上市公司股权结构与公司绩效的实证分析

大小非问题汹涌澎湃,专家学者还有众多投资者都在讨论究竟是否应该股改,现在又应该如何应对大小非减持。本文将通过对全流通上市公司的股权结构与公司绩效的实证分析来探讨这个问题,并且提出应对建议,认为对于大小非减持,不鼓励,也不限制,并且应该大力支持和鼓励控股股东收购有意减持的其他大非和小非的股份。     

Risk allocation under liquidity constraints

Risk allocation games are cooperative games that are used to attribute the risk of a financial entity to its divisions. In this paper, we extend the literature on risk allocation games by incorporating liquidity considerations. A liquidity policy specifies state-dependent liquidity requirements that a portfolio should obey. To comply with the liquidity policy, a financial entity may have to liquidate part of its assets, which is costly.The definition of a risk allocation game under liquidity constraints is not straightforward, since the presence of a liquidity policy leads to externalities. We argue that the standard worst case approach should not be used here and present an alternative definition. We show that the resulting class of transferable utility games coincides with the class of totally balanced games. It follows from our results that also when taking liquidity considerations into account there is always a stable way to allocate risk.     

廊坊高新技术产业发展现状与前景研究

随着高新技术产业对经济的贡献越来越大,高新技术在经济中发挥的作用越来越明显。近几年,廊坊高新技术产业增长迅速,高新技术产业体系逐步完善,其在廊坊经济中的重要性日益增强。高新技术产业发展是其机构、规模、范围等量的扩大和产业结构优化带来的绩效的持续提高。高新技术产业量的扩张表现为高新技术企业数量、资金运用总规模以及收益率等的增加,反映高新技术产业发展的广度。其总量增长是与经济总量增长相适应的,是高新技术产业发展的前提与基础。高新技术产业结构优化是高新技术产业发展质的提高,通过持续不断的结构创新措施促进产业结构的变迁与升级以及绩效的提高,表现为产业环境、自主创新能力、对外依存度等指标的提高,反映高新技术产业发展的深度,也是衡量一地区高新技术产业成熟和发达程度的重要尺度。文章从高新技术产业量的增多与质的提高两个角度对廊坊高新技术产业发展现状与前景进行研究。     

全封闭挂篮施工技术在高铁中的应用

全封闭挂篮,主要用于高墩、跨线路、跨河道且上部结构为变截面连续梁结构类型的桥梁施工工艺。在施工中,这种工艺可以节省人力、物力及财力,有效的为项目节约成本。结合我公司承建的京石客运专线滹沱河特大桥跨石太高速连续梁对全封闭挂篮施工技术作出归纳和总结。     

Siting a facility in continuous space to maximize coverage of a region

Siting facilities in continuous space such that continuously distributed demand within a region is optimally served is a challenging location problem. This problem is further complicated by the non-convexity of regions typically encountered in practice. In this paper a model for maximizing the service coverage of continuously distributed demand through the location of a single service facility in continuous space is proposed. To address this problem, theoretical conditions are established and associated methods are proposed for optimally siting a service facility in a region (convex or non-convex) with uniformly distributed demand. Through the use of geographic information systems (GIS), the developed approach is applied to identify facility sites that maximize regional coverage provided limitations on facility service ability.     

全封闭组合电器运检过程中常见故障及维护

本文从运维及检修两方面入手,对全封闭组合电器的运检工作特点、常见故障及维护方式进行了介绍,为全封闭组合电器变电站提供了运行及检修的工作依据,符合未来运维一体化的工作特点。     

线路保护通道改造中的问题探析

随着电网的快速发展,对继电保护通道的可靠性要求越来越高。在广西电网工程项目中有不少是将载波保护通道更改为光纤保护通道以提高通道可靠性的工程。文章对输电线路纵联保护进行原理分析,结合220 kV线路保护通道改造工程中出现的实际问题进行探讨,以提高运行维护及设计人员对保通道改造的认识,避免错误的发生。     

高职学生创业计划书有效性评估体系研究

高职创业学生创业计划书的有效评估体系是预测高职学生创业企业未来经营风险的有效评价工具,通过创业计划书初评体系的定性分析、合理性定性分析及创业企业风险权重定量分析各因素的均衡关系点,预测高职学生创业项目的可行性、合理性,是高职创业教育质量全面提升的全新路径.