英语原文共 13 页， J. Geogr. Sci. 2010, 20(6): 876-888 DOI: 10.1007/s11442-010-0817-2 copy; 2010 Science China Press Springer-Verlag 中国农村空心化在快速城市化进程中的驱动力 刘燕绥1，刘玉1,2，陈养芬1,2，龙华露1 1.中国科学院地理科学与资源研究所区域可持续发展模拟重点实验室，北京100101; 2.中国科学院研究生院，北京100049 摘要： 农村空心化是近期受到城市化快速发展在中国引起重视的地理现象，这一现象导致农村土地资源的浪费，对优化土地利用和统筹城乡发展设置了障碍。农村空心化有各种形式的表现形式，即农村居民的疏忽和空缺，这两种形式都可能导致农村住宅的破坏和最终放弃。损坏的住宅有不同程度的体现，从轻微，中等到严重。农村空心化的演变过程一般有五个阶段，即出现，成长，繁荣，稳定和衰退。基于区域经济�

英语原文共 8 页， 插层复合相变材料的综述：制备、结构和性能 Min Li, Zhishen Wu 摘要：本文综述了插层复合相变材料（PCM）的制备、结构和性能。粘土的层状结构和石墨被用来制备插层复合相变材料。当前研究的制备方法包括液相插层和熔融插层。通过将有机相变材料插入蒙脱石或者石墨可以改变热导率和阻燃性。通过差示扫描量热法（DSC）和温度曲线法测量插层复合相变材料的性质。 目录 1. 介绍 2. 相变材料的分类和特征 2.1 通过成分分类 2.2 通过相分类 3. 插层复合相变材料的制备 3.1 基于粘土的插层复合相变材料 3.1.1 层状粘土的有机改性 3.1.2 基于粘土的插层复合相变材料的制备 3.2 基于石墨的插层复合相变材料的制备 4. 插层复合相变材料的结构特征 4.1 X射线衍射（XRD）分析 4.2 扫描电�

英语原文共 7 页， 英语原文共 7 页，资料编号：[11830]，资料为PDF文档或Word文档，PDF文档可免费转换为Word

How Air Conditioners Work and energy conservation technology research Abstract： An air conditioner is basically a refrigerator without the insulated box. It uses the evaporation of a refrigerant, like Freon, to provide cooling. The mechanics of the Freon evaporation cycle are the same in a refrigerator as in an air conditioner. Keywords： water towers 、weather-resistant、 compressor、energy conservation When the temperature outside begins to climb, many people seek the cool comfort of indoor air conditioning. Like water towers and power lines, air conditioners are one of those things that we see every day but seldom pay much attention to. Wouldn#39;t it be nice to know how these indispensable machines work their magic? In this article, we will examine air conditioners -- from small to huge -- so you know more about what you#39;re seeing! The Many Faces of Cool Air conditioners come in various sizes, cooling capacities and prices. One type that we see all t

What marks the practice and discourse of trick films in Japan as distinct from this lineage is both a temporal delay, with substitution techniques and other tricks not being introduced in domestic filmmaking until well after their reign had ended in Europe and America, as well as a protracted dominance. Tricks entered the mainstream with Makino Shocirc;zocirc;, who began incorporating cinematic tricks in his “magical samurai” films in the early 1910s. Initially an owner of a kabuki theatre, Makino began to adapt his theatrersquo;s stage performances for the screen in 1909, and then quickly moved onto the fantastical kocirc;dan narratives popular in childrenrsquo;s literature of the period; by 1911 he had made hundreds of these films, and well into the mid-1910s his films tended to bring to the screen the supernatural feats of ninja, including shapeshifting and appearing, disappearing, and teleporting at will. Like his counterparts in E

Int J Adv Manuf Technol (2011) 53:1–10 DOI 10.1007/s00170-010-2796-y ORIGINAL ARTICLE Modular design applied to beverage-container injection molds Ming-Shyan Huang amp; Ming-Kai Hsu Received: 16 March 2010 / Accepted: 15 June 2010 / Published online: 25 June 2010 Springer-Verlag London Limited 2010 Abstract This work applies modular design concepts to designating beverage-container injection molds. This study aims to develop a method of controlling costs and time in relation to mold development, and also to improve product design. This investigation comprises two parts: functional-ity coding, and establishing a standard operation procedure, specifically designed for beverage-container injection mold design and manufacturing. First, the injection mold is divided into several modules, each with a specific function. Each module is further divided into several structural units possessing sub-function or sub-sub-function. Next, dimen-sions and specific

Android Application Fundamentals Android applications are written in the Java programming language. The Android SDK tools compile the code—along with any data and resource files—into an Android package, an archive file with an .apk suffix. All the code in a single .apk file is considered to be one application and is the file that Android-powered devices use to install the application. Once installed on a device, each Android application lives in its own security sandbox: The Android operating system is a multi-user Linux system in which each application is a different user. By default, the system assigns each application a unique Linux user ID (the ID is used only by the system and is unknown to the application). The system sets permissions for all the files in an application so that only the user ID assigned to that application can access them. Each process has its own virtual machine (VM), so an application#39;s code runs in isolation from other

英语原文共 12 页， 低成本自动识别系统为安全导航 文摘:自动识别系统(自动识别系统)保证了海上航行船舶和陆地监测中心之间信息的自动传输。自动识别系统收发器在登记总吨位三百吨及以上的船舶上是强制性安装的。系统支持在封闭和开放区域内的安全航行，而在前面提到的，由于雷达的范围有限，所以它特别有用。文章介绍了小型船舶和旅游船的低成本自动识别系统的安装不是强制性的，但可能是有价值的导航设备。还提出了一些有关精度的问题。 关键词:自动识别系统、航行、安全 介绍 自动识别系统是联合国国际海上人命安全公约的一个组成部分。这是一个舰载应答器系统，在甚高频海事波段操作，它将发送船舶信息到其他船只和海岸，如: bull;标识(海上移动站识别号，呼号，名称) bull;位置， bull;航向�

英语原文共 25 页， 智能船舶混合动力和推进系统的设计与控制：发展回顾 摘要 最近设计更高效和多功能船舶的趋势增加了混合动力推进和电源架构的多样性。为了提高这些架构的性能，需要智能控制策略，而目前主要采用常规控制策略。 首先，本文将船舶推进拓扑分为机械，电力和混合动力推进，以及电力拓扑结构分为燃烧，电化学，储能和混合动力电源。然后，我们回顾推进和供电系统及其控制策略的发展，随后讨论这些系统和相关控制的机遇和挑战。我们得出结论 采用先进控制策略的混合动力架构可以将油耗和排放降低10-35％，同时改善噪音，可维护性，机动性和舒适性。随后，本文总结了推进和供电技术的优点和缺点以及应用趋势，并回顾了有前途的先进控制策略的适用性和益处。 最后，本文分析了哪些控�

英语原文共 11 页， 计算机辅助设计 摘 要 在自由曲面精加工中，有三种主要类型的刀具路径拓扑：方向平行型，轮廓平行型和空间填充曲线（SFC）型。 SFC拓扑结构只能用一条路径覆盖整个表面。 在本文中，我们通过将计划任务作为旅行商问题（TSP）来提出规划SFC类型工具路径的新方法。 最佳路径分两步产生。 首先，在输入表面上产生一组规则的刀具接触（CC）点。 开发了一种切削模拟方法来评估扇形误差，并确定下一个CC点在横向进给的位置。 这种方法没有局部表面曲率假设，因此对于大型刀具是准确的。 其次，将获得的CC点输入到用于最佳CC点连接序列的高效TSP解算器LHK中。 为了从对角链接或穿透链接中停止CC点，在LHK中重新定义两个CC点的欧几里得距离评估函数。 所提出的刀具轨迹生成方法通过几个自由曲面的例子进�