基于SMS的智能家居远程控制模块设计

利用演化博弈理论,对参与主体异质性条件下的囚徒困境模型进行了探讨,求出了满足不同条件下的演化稳定策略,并对种群中个体异质性对演化稳定策略的影响进行了分析,得出种群中选择相同策略的个体异质性差异越大,参与个体选择合作行为作为演化稳定策略的可能性就越大.极端地,当个体的异质性趋向于无穷大时,合作成为唯一的演化稳定占优策略,为现实大多数合作系统中能保持长期的一种合作稳定状态提供了合理地解释.     

加强农业信息化建设 促进农业信息进村入户

近年来,武强县高度重视农业信息化建设工作,充分发挥农业信息服务在农业增产和农民增收中的作用。通过政策扶持,加大投入．加强农业网站建设,加强农村信息服务站建设,建立农业短信服务平台,开设农业电视专题节目,切实加强了农业信息服务站点和队伍的建设,促进了信息服务工作的发展,促进了农业科技推广应用。     

Serving a Diverse and Ever-Changing Agricultural Sciences Department: Family,Youth and Community Sciences in Perspective

Family, Youth and Community Sciences (FYCS) is an agricultural science department traditionally served by a science librarian. The unique set of information requirements that have grown with the scope of the department makes it a challenge to meet the diverse needs. No longer primarily covering the rural household, the department now encompasses theoretical, methodological, empirical, and practical issues associated with urban life, social trends, and complicated life-long financial planning. The information needs of this department far exceed the standard knowledge base of the traditional science librarian and require a strong foundation in social science, business, education, and health sciences information sources. This creates a restriction in information access for the many and varied members of FYCS departments. In order to relieve the restriction, science librarians must familiarize themselves with a variety of resources from statistical databases, government and international sources, and social science databases. This article covers the changes in the FYCS department, the expansion of information needs, the resources of vital importance to research and students, and the challenges to the science librarian in meeting their needs. The article concludes that the science librarian should understand the growing interdisciplinary nature of this science field and recognize the steps that must be taken to increase access to information.     

基于LonWorks和Delphi的智能家居设计

传统家居都是由独立的控制系统控制,且产品类型单一,无法进行联网工作.针对此问题,提出了一种基于多I/O智能节点的解决方案;它可实现对住宅三表远程计费及提供保安三防功能;利用Delphi开发监控界面,为用户提供一个图形界面的编辑工具,并且通过DDE技术与控制装置进行数据交换.实验表明,在实际的智能家居中,数据传输可靠,系统运行稳定.     

家电下乡的经济学思考

家电下乡是我国为应对国际金融危机冲击、促进国内消费需求、实现保增长、保民生、保稳定目标而采取的重要举措。本文以市场失灵与政府干预、马克思的供求平衡理论、总需求决定理论为指导,从家电下乡的概念、背景、意义入手,在分析家电下乡中存在的问题及原因的基础上,提出了应对措施。     

守望乡愁：东部山区农村老人的主动留守

城乡二元结构、对城市生活的不适应等通常被认为是农村老人留守的主要原因。我国东部地区也有留守老人,然而留守原因并非都是无奈之举,而是基于乡愁的理性选择。通过对100位留守老人的问卷调查以及23位留守老人的深度访谈,发现东部山区农村老人选择主动留守是对乡愁的守望,表现为五个方面：对故土的依恋、邻里的守望相助、维系传统的“家”观念、实现自我价值、重塑代际关系。最后就关爱留守老人从充实文化生活、提倡情感慰藉、建设美丽乡村三个方面提出相关建议。     

The comparative value of wild and domestic plants in home gardens of a South African rural village

Rural inhabitants make considerable use of wild resources from communal areas around their settlements, as well as from arable and residential plots. These wild resources compete with the main crops planted in arable plots and home gardens, but play a significant economic and nutritional role in rural livelihoods. This paper reports upon a conservative financial evaluation of the wild plant resources harvested from home gardens and arable plots by inhabitants of rural village in the Bushbuckridge lowveld (South Africa), and examines their importance relative to other domesticated crops. On average, each household made use of four to five species of wild plants growing on their residential plot, whereas the mean number of crop plants was 3.4. The total value of all plants was R1694 (US$ 269) per household per year, or approximately R4200 (US$ 667) per hectare of home garden per year. Wild plants represented 31% of the value of all plants grown on residential plots, relative to the 69% for domesticated crops (including fruit trees). Approximately 72% of the total value of all plant products was consumed by the household, and the remaining 28% was sold.This revised version was published online in November 2005 with corrections to the Cover Date.     

云南西双版纳傣族庭院C储量的研究

综合运用样方收获、生物量回归方程及标准木的方法进行样地调查,对西双版纳傣族庭院C储量进行了测定。结果表明傣族庭院的平均C密度为99 85tons·hm-2。证明传统傣族庭院作为一种生产和生态系统,具有良好的吸收CO2温室气体的能力。     

滇金丝猴的生境适应对策

滇金丝猴是我国特有的灵长类之一,分布于金沙江和澜沧江间云岭山脉的一个狭小区域内。文章基于前人对不同地理种群的滇金丝猴生态方面的研究结果的分析比较,从食性、季节性垂直迁移、家域利用和日行走距离方面讨论滇金丝猴的生境适应对策,并分析了其生境适应的生态学特性对物种保护的意义。     

莫氏田鼠种群生态研究

1991年-1993年在内蒙古大兴安岭库都尔林业局岩山林场野外设置8块样地和1块标志流放区,对莫氏田鼠(Microtusmaximowiczii)的种群数量动态、繁殖和巢区进行了研究。结果表明1991年为当地莫氏田鼠的数量高峰年,其种群数量最高月7、8月的捕获率在8种生境中平均为13．34％和‘21．89％,1992年为其数量低峰年,7月各个样方平均捕获率仅为L42％,与高峰年相差10倍一17倍。莫氏田鼠的最适生境沼泽地和塔头甸子3年平均捕获率分别为5．89％和3．9％,麦田中莫氏田鼠的数量也很高,3年的捕获率分别达到13．85％、0．78％和30％。莫氏田鼠的繁殖高峰在6月、7月,8月、9月几乎不进行繁殖,3年平均仔数为7．28。莫氏田鼠的巢区面积越冬雄性达1874．46+-539．31m2,越冬雌性达1658．54+-499．98m。