河南省粮食应急供应链响应能力的理论分析

粮食应急供应链的主要功能是为应对自然灾害和突发事件提供有力的粮食物资保证。河南省是中国重要的粮食主产区之一,在保障国家安全方面具有不可替代的特殊地位,这必然要建立、健全粮食应急供应链。研究粮食应急供应链体系的建设问题,对于提高政府危机管理的水平,增强应对自然灾害和突发事件的能力,具有重要而深远的意义。     

中小股东近乎全部出席股东大会的公司治理模式

只有小部分中小股东参加股东大会,客观上将公司的经营管理委托给控股股东,中小股东付出了巨大的委托成本,导致他们亏多盈少。通过创新制度：在出席股东大会的中小股东当中,由他们选举若干名＂补全代表＂,由这些＂补全代表＂行使未出席股东大会股份的表决权,中小股东近乎全部参加股东大会;中小股东以其持股总量按每5%持股量选派一名董事,每一位大股东分别以每5%持股量直接派出一名董事,董事会中既有控股股东的代表又有中小股东的代表,控股股东与其他股东相互约束并制衡,框架出一个全体股东同生共死、同等收益的治理模式。     

基于云模型的供电企业人力资源风险评价

为了掌控供电企业现存的人力资源风险状况,及时规避人力资源风险。本文建立了符合供电企业人力资源特点的人力资源风险评价指标体系。通过层次分析法和线性加权法确定人力资源得分。在对人力资源风险等级划分中,引入云模型。该模型摒弃了以往研究的硬划分,更能体现数据的分布特性。然后对评价对象进行逆向正态云化来获得其云参数,最后利用该云参数进行评价。通过实例证明,该模型能够挖掘出更多隐含的信息,具有可行性和有效性。     

双边间接网络效应对平台产品扩散与定价的作用研究

本文在BASS扩散模型的基础上,引入双边间接网络效应的作用,建立平台产品的扩散模型。研究发现:双边间接网络效应产生潜在的市场规模扩张,其和市场单边自扩散共同作用,使得平台产品的扩散形态可能呈单峰或多峰形状。按双边扩散表现为相互制约还是相互促进,平台产品市场扩散可分为潜在市场规模扩张起飞前和潜在市场规模扩张起飞后两个阶段。平台运营者需要正确判断产品扩散所处的阶段,谨慎制定正确的定价策略。     

Dynamics of the UK natural gas industry: System dynamics modelling and long-term energy policy analysis

We present a dynamic model of the indigenous natural gas industry in the UK. The model has been built using a system dynamics approach. Using the model several scenarios have been analyzed. We found that management of the supply-side policy alone cannot substantially postpone the discovery, production and consumption peak. We also found that the dynamics of the main variables, namely, exploration, production and consumption, are sensitive to initial demand conditions. Postponing the onset of gas price increases can therefore be achieved more effectively through efforts to reduce demand growth. One might expect that a low taxation policy would encourage more exploration and production of gas and thereby stimulate higher consumption rates. Instead, there was no overall net effect on production and consumption in the long term. The depletion effect on cost of exploration acts as counterbalance to low taxation policy. Depletion effect causes cost and thus price to rise further which depress consumption rate. The advances in exploration and production technology can delay the peak of exploration, production and consumption. Technological improvements mean lower cost of exploration and production which pressure down the long-term pattern of price dynamics.     

The impact of demographic change on energy use and greenhouse gas emissions in Germany

This paper estimates the impact of demographic change on energy use and greenhouse gas emissions in Germany. Since old people display different consumption patterns than young people, an increase in the proportion of old people affects overall consumption patterns. Micro data from a household survey are used to identify age-specific consumption patterns and to project the impact of demographic change on the structure of total consumption expenditure up to the year 2030. The resulting final demand vectors are entered into an environmental input-output model, which allows the calculation of sectoral production, energy use and greenhouse gas emissions. The model results suggest that until 2030, demographic change raises the share of methane in total greenhouse gas emissions and does not contribute to reducing energy use and greenhouse gas emissions in Germany. The model is also used to explore the effects of redistributing income between age groups and a policy-induced switch from motor vehicle use to public transport.     

股权分置改革效应模型及实证分析

Based on the sample of 939 Chinese listed companies in the 40 former reformed batches, this paper investigates the effect of Chinese split share structure reform and its impact factors. First, considering Chinese split share structure reform as an event, an effect model is set up by means of the event study method, which takes abnormal return rate as a basic indicator to measure the reform effect. Further, in order to look for the impact factors on the reform effect, the empirical comparing analysis for different batches, different trading posts and different boards are done. These results show that the reform has positive effects on Chinese stock market and increases value of the listed companies. There is higher transformable return rate in the reform batches which include more Chinese listed companies with high quality performances. The shareholders who are in Shenzhen Stock Exchange market get higher transformable return rate than the shareholders who are in Shanghai Stock Exchange market. SME board has higher transformable return rate than the main board.     

温哥华公园公众参与机制的借鉴

加拿大温哥华的公园建设和管理在全球取得了令人 瞩目的成果，这得益于温哥华公园管理局独特的体制与管理理 念。温哥华公园管理局以其独特的公众参与机制，为推动和 实现“绿色，和谐”的城市环境起到了重要的作用。通过介 绍温哥华公园管理局在社区文化共建、项目建设、政策制定3 种典型的公众参与模式，说明在“服务城市的所有人、社区和 环境”目标指导下的管理机制的特点与方法，为中国公园实现 “以人为本，共享发展”的目标提供借鉴。     

智慧BIM乔木模型：从设计图纸到施工 现场

现有的BIM应用软件提供的乔木模型多为RPC或高 精度3D模型等3D CAD类型。这些模型着重于表达美感或进 行展示,无法反映根系情况。虽然可能包含一定附加属性,但 表达乔木生长和空间需求的功能有限。因而,冲突检查、工序 调度等BIM的优势功能无从应用。风景园林实践领域已就此问 题开始构建自己的模型库,但能够准确反映现状树木真实尺寸 体量,以及现状树木和规划树木未来空间需求的模型仍未广泛 出现。提出一种基于树冠、树干和根系构型与生长功能的实体/ 网面封装建模方法构建BIM乔木模型。模型形态通过一组参数 调整,并根据树龄和反映环境限制因子的值来反映其变化。所 包含的数据和参数数量随后期设计阶段所需的LoD(详细层级) 及专业实践的具体要求而增加。该模型可以与提供本地区内外 苗木商品信息的植物数据库连接使用。     

Do vertical spillovers differ by investors’ productivity? Theory and evidence from Vietnam

Developing countries are eager to host foreign direct investment to receive positive technology spillovers to their local firms. However, what types of foreign firms are desirable for the host country to achieve spillovers best? We address this question using firm‐level panel data from Vietnam to investigate whether foreign Asian investors in downstream sectors with different productivity affect the productivity of local Vietnamese firms in upstream sectors differently. Using endogenous structural breaks, we divide Asian investors into low‐, middle‐, and high‐productivity groups. The results suggest that the presence of the middle group has the strongest positive spillover effect. The differential spillover effects can be explained by a simple model with vertical linkages and productivity‐enhancing investment by local suppliers. The theoretical mechanism is also empirically confirmed.