科技创新活动的模式与体制——以南京市为例

对科技创新活动的本质特点进行了探究,结合了南京市的实际情况分析了不同模式和体制对于该地区的适应性。     

2006年7月3日宁阳县大暴雨过程分析

分析了2006年7月3日山东省宁阳县大暴雨的形成过程,对这次大暴雨的形成机制进行了探讨。     

用经济学观点探讨城市苗木基地建设和管理

论述了如何运用市场机制和宏观调控等经济学观点对苗木基地的生产、管理和规划进行科学的指导。     

A Digital Right Management Model for Distribution of Digital Audiovisual Content

0 IntroductionDue to the success of Internet technology and the emer-gence of wide band network,downloading encoded dig-ital audiovisual content files via HTTP,FTP,etc ,had gainedfavor amongInternet users because of thei mmediate access todesired content . Digital Right Management (DRM) system,can satisfy the content provider by encrypting digital audiovi-sual content andli miting access to onlythose people who haveacquired a proper license to play backthe content[1].DRMas defined bythe …     

论地理信息系统的发展机理与发展趋势

从地理信息系统（ＧＩＳ）的发展渊源出发，总结了地理信息系统发展的４个阶段：６０年代起步阶段；７０年代发展阶段；８０年代应用阶段；９０年代成熟阶段．提出了地理信息系统的４个发展趋势：体系结构日臻完善；向多用途综合化方向发展；向智能型辅助决策方向发展；向实用型产业化方向发展     

Game Theory Study on Distributors＇ Alliance to Gain Competitive Advantage in Marketing Channel

Using the Cournot Game Model, this paper has analyzed the motivation of the distributors＇ alliance to gain competitive advantage in marketing channel. At first, this paper separately analyzed the advantage of alliance in the situation of one- short game and infinitely repeated game, then, based on the analysis of distributors＇ betrayal of the alliance under infinitely repeated game, the conditions to maintain the distributors alliance are put forward and discussed.     

Synthesis and characterization of poly(ethylene oxide‐co‐ethylene carbonate) macromonomers and their use in the preparation of crosslinked polymer electrolytes

Methacrylate‐functionalized poly(ethylene oxide‐co‐ethylene carbonate) macromonomers were prepared in two steps by the anionic ring‐opening polymerization of ethylene carbonate at 180 °C, with potassium methoxide as the initiator, followed by the reaction of the terminal hydroxyl groups of the polymers with methacryloyl chloride. The molecular weight of the polymer went through a maximum after approximately 45 min of polymerization, and the content of ethylene carbonate units in the polymer decreased with the reaction time. A polymer having a number‐average molecular weight of 2650 g mol^?1 and an ethylene carbonate content of 28 mol % was selected and used to prepare a macromonomer, which was subsequently polymerized by UV irradiation in the presence of different concentrations of lithium bis(trifluoromethanesulfonyl)imide salt. The resulting self‐supportive crosslinked polymer electrolyte membranes reached ionic conductivities of 6.3 × 10^?6 S cm^?1 at 20 °C. The coordination of the lithium ions by both the ether and carbonate oxygens in the polymer structure was indicated by Fourier transform infrared spectroscopy. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 2195–2205, 2006     

青海城镇体系发展的历史轨迹与动力

青海城镇体系经历了发韧期、奠基期、转型期3个发展历程.在这一过程中,湟水谷地最先拉开了城镇发展的历史帏幕,随后逐步向西扩展进入青海湖地区.宏观上,从农耕区向农牧交错区渗透,进而向游牧区拓展,反映了社会历史进程和地域开发进程的调控作用,因此城镇分布数量和密度呈现出农耕区—农牧交错区—游牧区逐级递减的趋势.中观上,以河流为脉络,城镇发展或溯源而上伸入高原腹地,或向河谷两岸推进,进入山区,表现为从优势生存空间向劣势生存空间的时空转化,城镇数量与密度呈现出川水地区—浅山地区—脑山地区的递减趋势.微观上,河谷农耕区城镇选址多位于河流阶地上,土地肥沃,取水便利;而牧区城镇的选址却往往与水草丰美的牧场相关,映射出古代城镇对自然条件和自然物质基础的依赖性.总体而言,青海省城镇兴起和发展的动力,主要来自于外部中央行政建制和军事据点的设置,而非城镇内部社会经济自我发展.就单个城镇而言,民族文化、民族宗教与民族贸易的亲合关系和响应力,是城镇成长的主要推进剂.     

从民问借贷的保护机制看惯例的经济价值

运用博弈论理论分析了民间借贷的保护机制——惯例形成的根据。进一步研究了惯例的经济价值——节省社会交易成本，并实现了非正式制度的资源配置功能。