农业经济可持续发展初探

随着经济全球化和知识经济时代的来临,人类对农业生产的认识在不断提高和深化,农业经济可持续发展已成为当今世界的热点问题。本文运用可持续发展和复合生态系统理论,采用生态学和经济学的基本原理和方法,立足农业资源条件及所存在的问题,围绕农业经济可持续发展这一主题,探讨持续农业发展的方向、途径和具体对策。     

家蚕18项血液生理生化性状的杂种优势分析

测定了家蚕 3对现行品种及其杂交种的 18项血液生理生化指标 ,计算其杂种优势指数。发现 13项指标呈正负超亲优势 ,其中 :葡萄糖含量有较高的正超亲优势 ;钙、无机磷及球蛋白含量与乳酸脱氢酶活性基本没有杂种优势 ;谷丙转氨酶等 8项性状表现正杂种优势的趋势较强 ;尿酸等 4项性状则表现负超亲优势的趋势较强。按代谢类型分 :蛋白质代谢相关的 9项性状中呈现正负超亲优势的有 5～ 8项 ,占 5 5 .6 %～ 88.9% ;能量代谢相关的 6项中有 2～ 5项 ,占 33.3%～ 83.3% ;脂代谢相关的 2项中有 1项呈负超亲优势 ,占 5 0 %。表明家蚕经济性状广泛的杂种优势有其普遍的生理生化基础     

Modular Design Base on Variety Theory

Variety Design not only support to short down development time, and cut down development cost, but also support to response marketing rapid, is a kind of modern design theory which apply on Mass Customization. In some way, Variety Design is a kind of design that integrates standard design and modular design, and Variety Design object is high cost and universal parts that among platform. The authors discuss the modular design role and the different between integral design, promote the method and the step of modular design, so change the low cost parts design, and give an new product based on the platform. Based on this model, they not only save the cost of develop new product, but also save time, achieve advantage which Mass produce process.     

Innovation of Construction Projects Management Based on the Five-dimension Modeling

Nowadays,the computer technology is applied more and more widely in the architecture,engineering and construction industries(AEC).This paper introduces a methodology of construction project management based on the five-dimension modeling which integrates three-dimension building models,resources and schedules by the development of virtual construction technology.The application of this method also influences several aspects of project management such as range,time,cost,resource,communication and information management.Finally,the process of 5D modeling and the management practice are presented through a real life case in Beijing which proves to be a more efficient,productive and economy project.     

1-MCP处理对桃冷藏期间品质和生理特性的影响

秦王”桃采收后分别用不同浓度1-MCP处理,然后置于(0±1)℃冷库中贮藏。结果表明:1-MCP处理对贮藏期果实的硬度、可溶性固形物含量无显著影响。经处理的果实在贮后20天果皮细胞膜透性开始异常增加。10nL/L和30nL/L1-MCP处理的果实比对照提前5天出现了呼吸高峰和乙烯释放高峰;500nL/L的处理抑制了果实的呼吸作用,与对照相比大幅度降低了乙烯峰值,在相同贮藏时间多酚氧化酶(PPO)和过氧化物酶(POD)活性也显著降低(p<0.05),表明500nL/L的1-MCP处理能有效地抑制果肉褐变,延长果实贮藏时间。     

3种白三叶品种萌发期对干旱胁迫的响应及抗旱性评价

用不同浓度(0、5％、10％、15％、20％、25％)的聚乙二醇6000(PEG-6000)溶液模拟干旱胁迫条件,对3种白三叶萌发期的相对发芽率、相对发芽指数、相对活力指数、抗旱指数、相对根长、相对芽长共6项指标进行研究.结果表明:1)随着干旱胁迫程度的加剧,3种白三叶种子相对发芽率、相对发芽指数、相对活力指数、抗旱指数、相对根长、相对芽长总体均呈下降趋势,且瑞文德下降幅度最大;2)5％ PEG浓度能促进vns和荷兰白种子萌发和幼苗的生长;3)采用隶属函数法对3种白三叶萌发期的抗旱性进行了综合评价,抗旱性强弱顺序为:vns＞瑞文德＞荷兰白.     

Researching and Developing a Hybrid Electrical Vehicle

There are more than two power source in Hybrid Electrical Vehicle(HEV). By using of assist accelerating, power regeneration, Idle stop and power management, HEV gains more acceleration performance and more fuel economy and better gas emission than Conventional Vehicle(CV). With Integrated Starter and Generator(ISG) as a auxiliary power source, batteries and battery control module and power manage module as a Load leveling Device (LLD), two prototype HEV separately equipped Manual Transmission (MT) and Continuously Variable Transmission (CVT) was successfully developed.     

Real-time Monitoring System of the Pump Station for High Press Water

With the development of industrial automation technology, the monitoring system becomes more and more important in the control system. The paper discusses the monitoring system design based on the pump station for high press water. At first, the paper introduced the base process and the control system of the pump station for high press water. The control system includes two parts: upper part and lower part. The control network consisted of some PLC controls the device in the system. Then the method of the OOP technology application to the monitoring system design are emphatically introduced and discussed. Finally, the paper briefly introduced the main function models and the key technologies.     

Construction and Realization Method for 3 -D Digital City

This paper studies the key technology in the 3 - D digital city construction, and puts forward a new method to construct and realize the 3 - D digital city. The authors discuss the dates gathering and disposal from the collection of 3 - D topograph dates, the construction and ingress of 3 - D model, the gathering and disposal of texture dates. Subsequently, to solve the problem of that the 3 - D topograph dates are greater than the 2 - D topograph, the bulk-dates optimization of 3 - D digital city is realized through the choose of appropriate DEM of linenumbers and column numbers, the 3 - D model modeling specification, the using of nodes replace, the optimization of LOD modeling. The successful operation result of Chongqing Hi-tech Development Zone 3 - D digital city project illustrates that, this system can realistic mimic status in quo of the Chongqing Hi-tech Development Zone, the system operates smoothly, and its effect is also well.     

栽培种花生遗传图谱的构建及主茎高和总分枝数QTL分析

栽培种花生是异源四倍体,基因组大,构建花生的分子遗传连锁图谱并对相关性状进行QTL定位研究的工作缓慢。本研究以遗传差异大的亲本组配杂交组合富川大花生×ICG6375构建F2作图群体,采用公开发表的2653对SSR引物,构建了一张含有234个SSR标记、分布于20个连锁群的栽培种花生遗传图谱。该图谱覆盖基因组的长度为1683.43c M,各个连锁群长度在36.11~131.48 c M之间,每个连锁群的标记数在6~15个之间,标记间的平均距离为7.19 c M。结合F3在湖北武汉和阳逻环境下的主茎高和总分枝数鉴定结果,应用Win QTLCart 2.5软件采用复合区间作图法进行了QTL定位和遗传效应分析。共检测到17个与主茎高和总分枝数相关的QTL位点,贡献率在0.10%~10.22%之间,分布于8个连锁群上。综合分析武汉和阳逻环境的鉴定结果,获得重复一致的与主茎高相关的6个QTL,其中q MHA061.1和q MHA062.1位于连锁群LG06上TC1A2~AHGS0153标记区间,贡献率为5.49%~8.95%;q MHA061.2和q MHA062.2位于LG06上AHGS1375~PM377标记区间,贡献率为2.93%~5.83%;q MHA092.2和q MHA091.1位于连锁群LG09上GM2839~EM87标记区间,贡献率为0.53%~9.43%。