供应链网络机制与动态特性的研究

针对传统供应链中地点分布散，提前期长，灵活性差，无法及时了解各节点库存状态，造成顾客满意度下降，客户资源流失，性能不稳定等问题，提出了一种基于动态的多级供应链网络规划模型，采用了混合整数规划方法，将战略层与作业层相结合，得到成本最小、性能稳定的柔性供应链结构。应用Z变换和指数平滑预测方法进行仿真分析。比较了两种供应链网络规划的动态效果。     

Robert Boyle and the heuristic value of mechanism

This paper argues that, contrary to the claims of Alan Chalmers, Boyle understood his experimental work to be intimately related to his mechanical philosophy. Its central claim is that the mechanical philosophy has a heuristic structure that motivates and gives direction to Boyle's experimental programme. Boyle was able to delimit the scope of possible explanations of any phenomenon by positing both that all qualities are ultimately reducible to a select group of mechanical qualities and that all explanations of natural phenomena are to be in terms of the operations of machines and are to appeal only to qualities that are already familiar. This is illustrated by his investigations into the Torricellian experiment. Boyle's explanation of the elevation of the mercurial cylinder by appeal to the spring of the air was an intermediate mechanical explanation. Boyle was convinced that the spring of the air was ultimately reducible to the mechanical qualities. This in turn had implications for his research into the cause of respiration. In a move that was both parsimonious and consistent with the broad requirements of the mechanical philosophy, Boyle was able to solve the problem of the cause of the inflow of air into the lungs by appeal to his research in pneumatics. This application of a mechanical explanation in pneumatics to physiology is just what one would expect if the mechanical philosophy was as universal as Boyle claimed it to be. Therefore, far from Boyle's experiments having a life of their own, they were clearly directed by and understood in terms of the mechanical philosophy.     

管内竖直向上固液两相流固相非均匀分布及其机理分析

根据粒径和流量的不同，管内竖直向上固液两相流动可能会出现四种基本流型，即固定床模式、局部流化模式、充分流化模式和水力输送模式．在充分流化模式中，固相存在着明显的轴向分布不均匀性．通过对轴向分布不均匀性现象的详尽的观察与分析，提出了逐层流化-壁面效应机理模型，给出了床体膨胀曲线的测量结果，并指出，稳定流化的流量操作范围窄是固液流化床的固有特性。     

The ontic conception of scientific explanation

Wesley Salmon's version of the ontic conception of explanation is a main historical root of contemporary work on mechanistic explanation. This paper examines and critiques the philosophical merits of Salmon's version, and argues that his conception's most fundamental construct is either fundamentally obscure, or else reduces to a non-ontic conception of explanation. Either way, the ontic conception is a misconception.     

Enhanced hydrogen storage of alanates: Recent progress and future perspectives

The global energy crisis and environmental pollution have caused great concern. Hydrogen is a renewable and environmentally friendly source of energy and has potential to be a major alternative energy carrier in the future.Due to its high capacity and relatively low cost of raw materials, alanate has been considered as one of the most promising candidates for hydrogen storage. Among them, LiAlH_4 and NaAlH_4, as two representative metal alanates, have attracted extensive attention. Unfortunately, the high desorption temperature and sluggish kinetics restrict its practical application. In this paper, the basic physical and chemical properties as well as the hydrogenation/dehydrogenation reaction mechanism of LiAlH_4 and NaAlH_4 are briefly reviewed. The recent progress on strategic optimizations toward tuning the thermodynamics and kinetics of the alanate including nanoscaling,doping catalysts and compositing modification are emphatically discussed. Finally, the coming challenges and the development prospects are also proposed in this review.     

新疆煤炭开发生态补偿机制研究

文章在分析新疆现行的煤炭资源补偿机制及其补偿作用的基础上,调查分析了新疆建立煤炭资源生态补偿机制的基础和条件,提出从补偿对象、补偿主体、补偿模式、补偿数额量化以及补偿费使用5个基本方面构建煤炭生态补偿机制,并提出适合新疆实际的对策建议。     

节能型不对行玉米收获机摘穗机构的研究

介绍了一种节能型不对行玉米收获机摘穗机构.该机构由一根方轴和多个摘穗轮组成.摘穗轮浮动安装在方轴上,摘穗轮由一个轮毂和安装在其外圆柱面上的多根摘穗杆构成.与目前普遍应用的辊式摘穗机构相比,该机构具有节能明显、结构简单、可自动对行、收获率高等特点.并在其结构及工作原理的基础上,进行了运动分析和功耗分析.     

中国通信产业自主创新体系国际化发展路径和影响机制研究——以华为公司为例

我国的各产业中,实现自主创新突破的多集中在一些技术简单、规模化生产领域,在技术比较复杂的领域(如半导体、汽车)有较大差距。通信设备制造产业却是一个例外。本文把华为作为通信产业的代表性企业,回顾华为的发展路径,从企业内部和外部两个角度,分析华为自主创新体系国际化的影响因素,进行自主创新国际化的影响机制研究。     

造纸与磷肥废液调控普钙水分机理初探

用红外光谱法探讨造纸与磷肥废液调控普钙水分的机理。     

寡聚糖在畜禽生产中的应用

本文综述寡聚糖作为一种新型添加剂在畜禽生产中的发展历史、运用种类,对动物微生态区系的影响,以及在生产实践中的作用效果。