需求信息预测对制造商回收再制造策略的价值

新能源汽车及其加能站的扩散是多种主体相互作用的复杂过程。现有的分析该过程的基于agent的模型没有考虑现实的路网结构和驾车者行驶路线的分布,不能为具体某一城市或地区新能源汽车的推广提供决策支持。本文探索了一种集成ABM(基于agent的建模)与GIS(地理信息系统)的技术实现方法,其核心思想是利用Repast仿真框架对图形文件的读写接口,建立其与ArcGIS间的通信,形成一种松耦合的、基于矢量的集成方式。应用该集成方式,本文以上海市为例构建了基于城市路网结构的新能源汽车及其加能站交互扩散的仿真平台。     

浅谈大学德育建构模式——德育生活化模式

思想道德建设是建设社会主义和谐社会的重要内容,同时发挥着教育引导作用。现有的大学德育模式,其德育效果并不明显。大学德育建构模式认为,道德既是被给定的,同时又是自我设定的。大学德育生活化模式是学校德育的必然选择。     

On stochastic processes for quantitative trait locus mapping under selective genotyping

We consider the likelihood ratio test (LRT) process related to the test of the absence of QTL (a QTL denotes a quantitative trait locus, i.e. a gene with quantitative effect on a trait) on the interval [0, T] representing a chromosome. The originality of this study is that we are under selective genotyping: only the individuals with extreme phenotypes are genotyped. We give the asymptotic distribution of this LRT process under the null hypothesis that there is no QTL on [0, T] and under local alternatives with a QTL at t^☆ on [0, T]. We show that the LRT process is asymptotically the square of a ‘non-linear interpolated and normalized Gaussian process’. We have an easy formula in order to compute the supremum of the square of this interpolated process. We prove that we have to genotype symmetrically and that the threshold is exactly the same as in the situation where all the individuals are genotyped.     

Population and land use change in the California Mojave: Natural habitat implications of alternative futures

Demographic and land use dynamics have important implications for the natural environment within both developed and developing nations. Within the context of developed nations, popular and policy debates surrounding contemporary patterns of suburbanization attest to the salience of demographic and development issues. We examine the implications of land-use patterns as related to population and development within the context of the California Mojave Desert ecosystem. In a general sense, we aim to better understand the land requirements inferred by varying levels of population growth and density, as well as the natural habitat implications of those requirements. We develop a GIS including remotely sensed imagery, and demographic, economic, and biophysical data to examine of the implications of various demographic scenarios on species diversity. Spatial and statistical models are designed to develop possible alternative land use `futures'. Within the context of the California Mojave region, our results suggest that high-density development could reduce conflict with regions providing potential habitat for threatened or endangered species by over 80 percent. The process of model development demonstrates a potentially useful tool for policymakers, allowing for estimation and visualization of the land use implications of policy decisions.     

答非所问——一种常用的话语回应策略

在交际活动中,英美人对以获取明确信息为目的的问话,常常选择答非所问的回应方式。这种回应以三种形式居多,最突出的特点即是回应内容看似离题,实则与话题有一定的相关性。促使说话者做出此种回应选择的原因复杂多变,客观上增大了英语学习者交际的难度。对此,宜采取有针对性的措施。