基于都市发展阶段论的城市居住隔离研究

本文归纳并总结我国居住隔离研究的现状,从研究成果及应用性、研究层面及针对性和规划对策三方面评述居住隔离研究存在的问题,在此基础上引入并剖析都市发展阶段论与居住隔离的内在关联,结合我国城市化特点构建基于都市发展阶段论的居住隔离研究框架,探讨我国居住隔离问题的应对策略,并着重论述框架中各类居住隔离问题的混居措施。     

农村一二三产业融合发展理论与模式探讨

对产业链理论、比较优势理论、供给侧结构性改革、农村一二三产业融合发展理论进行系统分析和讨论,提出农村一二三产业融合的发展模式。为农村一二三产业的融合发展提供系统的理论和政策支撑。     

OA协同办公系统在大型集团的部署实施

文章首先介绍了冀中能源集团实施OA系统的背景及定义,着重从OA系统的实施策略、OA项目实施经验总结、实施效果和体会等方面进行了阐述。对规范化集团系统实施提供了宝贵的经验,OA系统作为集团信息基础平台和协作办公辅助平台,是集团信息化建设中的重要环节,保障集团实施绿色、高效和可持续性发展。     

农村地区首先实现 FTTH（光纤到户）

分析我国农村地区有线电视网络发展所经历的3次接入网建设升级模式，在“宽带中国”上升为国家战略的新形势下，列举了我国农村有线电视网络所面临的困境，创新提出了“农村地区首先实现FTTH（光纤到户）”的战略抉择，并做出农村地区光纤到户的技术方案。     

双树寺电站电气化县改造项目设计优化及调试运行对策

为消除双树寺电站水工建筑病险隐患,解决机电设备老化、发展进入瓶颈的问题,通过相关参数的优化,减少弃水,增大流量;在装机容量新确定为1600k W时,选择混流式机组;并对压力管道设计、水轮机选型设计、水轮机吸出高度确定、安装高程设计等进行总体优化;调试运行过程中,针对导水叶密封不严、轴瓦温度过高、水轮机出力不足、发电机振荡和失步问题,研究补救措施和解决技术方案。技改后,原有的病险隐患消除,效益显著,电站实现了农村水电安全生产标准化建设目标,有效保护了生态环境,推进了绿色小水电建设发展进程。     

Inexact Newton methods for model simulation

Robust and efficient solution techniques for solving macroeconometric models are increasingly becoming a key factor in developing models employed by policy-making institutions for policy simulations and forecasting. Traditionally, when solved in the presence of forward-looking variables, these models are nonlinear, large-scale and sparse and give rise to large and highly structured nonlinear systems. This paper proposes a Newton-GMRES method obtained tuning up the basic algorithm by properly choosing the forcing terms sequence and the preconditioning strategy. In addition, the Newton–GMRES method is wrapped into a globalization strategy based on a nonmonotone linesearch technique in order to enlarge its convergence basin and to enhance its robustness. The combination of these ingredients yields a reliable method with low memory requirements. Numerical experiments using the MULTIMOD model and a basic real business cycle model are presented. A Matlab code based on this approach is provided.     

Dynamic phase balancing in the smart distribution networks

A distribution system might be unbalanced due to various reasons which can cause some major problems. Re-phasing strategy is the most effective method for phase balancing performed manually in distribution networks. Dynamic phase balancing is the main objective of this paper that means re-phasing performance at any time of day when unbalance is more than permissible limit. It is possible only in smart distribution networks by installing the automatic re-phasing switches at busbars. Automatic re-phasing eliminates the customer service interruption cost and labour cost available in the manual re-phasing operation. There are two basic operations in the optimal dynamic phase balancing: detecting the best time for re-phasing and considering the load variations in real distribution networks. This paper consists of two scenarios. First scenario is switches installation at all nodes of feeder and second scenario is switches installation at the limited strategic nodes. First scenario focuses on search space reduction by employing a sensitivity analysis method which improves the convergence along with time saving. In order to solve the proposed optimization problem, the modified shuffled frog leaping algorithm (MSFLA) is implemented. Simulation studies greatly demonstrate the benefits achieved from this operation by reducing power loss cost and improving network phase balancing.     

浙江农宅平面信息域统计分析——以绍兴市为例

为探究长三角地区农宅平面尺寸在宏观区域上的统计规律,基于Google Earth探向功能,以长、宽作为农宅平面尺寸的标示参量,应用频数统计法分析农宅长、宽在环向及径向分析路径上的频数分布特征。统计结果表明:不管是在环向,还是在径向上,农宅长度都是以3到4个自然开间尺寸的占比最大,农宅宽度都是以2到3个自然开间尺寸的占比最大;在环向上,各区域农宅长度、宽度的频数分布较为相似,且其主要占比区间相对稳定,农宅长度在3到4个自然开间尺寸所占比例约为51%,宽度以2到3个自然开间尺寸为主,其比例为70%左右;在径向上,各区域农宅平面尺寸在各开间的比例差异较大。上述方法与结论对区域视角下的农宅节能潜力分析及既有建筑节能改造策略等问题的研究具有方法借鉴与理论指导意义。     

走出我的象牙塔：英语教师职初教学生活案例研究

以现象学式的深度访谈、课堂观察、教学日志等方式来收集数据,对一位高校英语教师职初教学生活进行了个案研究。结果发现,教师的主要困惑体现在教学方法、教学内容、师生关系以及教学安排这4个层面,并相应地采取了＂策略性顺应＂和＂内化性调整＂两大社会化对策。研究可为改善外语教师职前与在职一体化发展提供现实依据,为完善高校外语师资培养的多元化模式提供一定的思考空间。     

Product mix strategy and manufacturing flexibility

The manufacturing industry is facing a turbulent and constantly changing environment, with growing complexity and high levels of customisation. Any investment solution should address these problems for a dynamic market and within limited budget boundaries, so that companies try to remain competitive. The authors propose a real options model to support firms making important investment decisions, specifically decisions associated with the acquisition of new equipment aimed at allowing firms to increase their manufacturing flexibility for the production of both standard and customized products. This paper is partially based on a real operating experience related to visual finishing technology features in an industrial company that conforms to the definitions of the product mix. The authors’ motivation for this work is driven by firms’ desire to satisfy specific customer needs, and to respond to them quickly under uncertain demand. Our goal, using theories from finance, production management, and product offering management, is to conclude that there is a relevant difference between the evaluation of the technology that is to be chosen, and the potential value due to product mix adaptations that are able to provide the maximum return from investment. We address problems related to standard and customized production systems, and the decision to invest in a set of resources that will enable this choice.