非稳定边界条件下地下水流场数值模拟

地下水流数值模拟的目标是复制和再现实际地下水流状态。非稳定边界是指,模拟流场和外部环境通过它进行的物质、能量和信息交换具有重要影响且该交换规律难以准确刻画的边界。对于潜水含水层平面二维非稳定流,边界的非稳定性集中体现在水力坡度和含水层厚度上,可以借助迭代法实现模拟,应用该方法成败的关键在于相邻二时段边界渗流量的差值是否满足精度要求。给出非稳定边界条件下地下水流场数值模拟实例,并综合采用水位拟合、水量均衡和流场分析等方法对模拟结果进行识别和验证。     

Constructing forest plans interactively based on owner-driven evaluation of the holding- and stand-level alternatives

In this study, an interactive forest planning process corresponding to the practical demands was developed and further tested in a challenging forest planning situation in northeastern Finland. The process includes prior preparation of alternative stand-level treatments and a small amount of holding-level forest plans; an interactive planning session consisting of the primary choice of the forest owner's profile; the owner's selection of the best holding-level plan; and finally a local improvement of this plan. The method as a whole aims to bridge the gap between the prevailing planning culture that has developed for private forest planning over three decades in Finland and the planning approach suggested by multiobjective forest planning theory. The usability and characteristics of the process were evaluated through an exercise set given to both forestry students and forest professionals. Tests of the process indicated, among other things, that comparison particularly of stand-level alternatives and offering owners the possibility to make changes and truly affect the end-result of the planning process are seen as important characteristics of the process.     

基于MATLAB GUI的夫琅禾费单缝衍射仿真

根据夫琅禾费单缝衍射的基本原理,利用MATLABR2008a的图形用户界面(Graphical User Interfaces,GUI)设计了单缝衍射的仿真交互界面,给出了单缝衍射仿真结果.该仿真能使单缝衍射理论和实验很好地结合起来,具有一定的应用价值.     

期刊阅览室人性化管理与读者互动服务的探讨

高校期刊阅览室是广大师生获取现代知识信息的重要场所之一,在图书馆占有重要的地位。在读者服务工作中,人性化管理是图书馆服务的发展方向,是现代高校图书馆管理的新理念。探讨了通过人性化管理与读者互动服务的实施,达到满足读者快捷、多元化的需求,从而提升图书馆管理水平和服务质量。     

山葡萄低温诱导酵母双杂三框cDNA文库构建和VaCIPK18互作蛋白筛选鉴定

类钙调磷酸酶B亚基蛋白CBL(calcineurinB-likeprotein)与其互作蛋白激酶CIPK(CBL-interacting protein kinase)组成的CBL-CIPK系统,在真核生物钙信号转导及各种胁迫应答途径中发挥重要作用。采用SMART与LD-PCR技术构建了山葡萄‘双丰’(Vitis amurensis Rupr.‘Shuangfeng’)叶片组织低温胁迫下的均一化酵母双杂交三框cDNA文库,库容量分别为1.7×106、1.3×10⁶与1.9×10⁶cfu·mL(-1),外源基因插入片段长度约为500～2 000 bp,重组率为100%,符合后续双杂交筛选要求。以本课题组前期鉴定受低温诱导表达、具有核质亚细胞定位的山葡萄VaCIPK18全长(VaCIPK18)、激酶结构域缺失(VaCIPK18^△S_TKc)以及NAF结构域缺失(VaCIPK18^△NAF)为诱饵,进行酵母双杂交筛选,获得了17个候选互作靶蛋白;从中选取并克隆了7个参与非生物胁迫的候选互...     

高校学报刊网互动平台的构建

高校学报应当充分利用网络系统来拓展自己的生存空间,使高校学报不断的发展壮大,这已成为高校学报一项越来越重要的工作。目前,高校学报网站主页使用现状令人堪忧,亟需加强。新闻信息与读者(作者)的互动、宣传推广与征订的互动、刊网内容上的互动、编辑部与读者的互动是实施高校学报刊网互动的4个有效途径,人力资源和技术资源是实现刊网互动所必须的资源配置。     

Governance interactions in small‐scale fisheries market chains: Examples from the Asia‐Pacific

Small‐scale fisheries are subject to various governing institutions operating at different levels with different objectives. At the same time, small‐scale fisheries increasingly form part of domestic and international market chains, with consequent effects for marine environments and livelihoods of the fishery‐dependent. Yet there remains a need to better understand how small‐scale fisheries market chains interact with the range of governance institutions that influence them. In this paper, we examine how multiple governance systems function along market chains, in order to identify opportunities for improved multiscale governance. We use three small‐scale fisheries with varying local to global market chains operating in the Asia‐Pacific region to develop a framework for analysis. Drawing from Interactive Governance theory we identify governing systems that have come to operate at particular sections in each market chain. We recognize four institutions that shape the governance over the length of the chain; namely those centred on (a) government, (b) private sector and pricing, (c) decentralized multistakeholder management and (d) culture and social relations. The framework shows how diverse arrangements of these governing institutions emerge and take effect along market chains. In doing so, we seek to move away from prescribed “ideals” of universal governing arrangements for fisheries and their market chains, and instead illuminate how governing systems function interactively across multiple scales.     

我国城市化进程中体育产业发展问题研究

用历史研究法以及相关的量化数据,通过对古今中外城市化发展基本规律的分析,探讨了当前我国城市化发展的阶段性特点,进而阐述了城市化发展与体育产业发展的相互作用及其关系,指出我国体育产业发展将呈现大众健身娱乐业蓬勃发展、高水平竞赛表演业发达、公共服务型体育产品有待开发、体育产业结构优化升级等新趋势。     

设施耕作促进农田土壤有机碳矿化

为研究土地利用方式变化与温度对土壤有机碳矿化的交互作用,利用室内培养实验,研究了寿光市农田转变为设施菜地及设施菜地荒废与增温对土壤有机碳矿化的交互作用。结果表明:增温显著促进土壤有机碳矿化(P0.01),农田、设施菜地及荒废设施菜地土壤有机碳累积矿化量分别增加56.08%、42.32%和42.36%。农田转变为设施菜地显著促进土壤有机碳矿化(P0.05),设施菜地有机碳累积矿化量分别增加185.81%(25℃)、160.61%(35℃)。相同增温条件对设施菜地土壤有机碳累积矿化量的促进作用明显高于农田,这主要是因为设施菜地土壤有机碳易分解组分的温度敏感性系数(Q10=1.79)明显高于农田(Q10=1.37),且设施菜地土壤颗粒有机碳含量明显高于农田造成的。设施菜地荒废后,交互作用变为加和效应,因其土壤有机碳易分解组分的温度敏感性系数(Q10=1.41)与农田无差异。综上所述,设施耕作显著促进土壤有机碳矿化,其中增温与农田转变为设施菜地对土壤有机碳矿化的交互作用为正效应。因此,利用单因素之和评估多因素对土壤有机碳矿化的综合影响可能会低估其影响水平。     

基于Blackboard教学平台的医学文献检索课教学模式改革

比较了传统教学模式和网络教学模式的优缺点,指出了医学文献检索课应采取传统教学模式和网络辅助教学模式相结合的模式,详细介绍了Blackboard教学平台的功能模块在构建医学文献检索课新型教学模式的具体应用。