The Access control system Access control system is widely used in recent years and it is one of the high-tech and safety equipment , has become one of the intelligent signs of modern architecture. Access control , the export and the entrance control system, is to control the export and entrance channel system. Access control system is developed on the basis of the traditional locks (Entrance Guard/Access Control in English). Residential area is characterized by a user focus, capacity, unified security management, and most of the country income is not high, so residential security system must meet the 'safe, reliable, cost-effective, centralized management' requirements, although the market has the various types of security systems, but the real plot line with the characteristics of the product for residential use are not many. Building intercom system as such products, with a connection less afraid of short-circuit isolated household, indoors without electricity, no stan

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Internet of Things for Smart Cities Andrea Zanella, Senior Member, IEEE, Nicola Bui, Angelo Castellani, Lorenzo Vangelista, Senior Member, IEEE, and Michele Zorzi, Fellow, IEEE Abstract—The Internet of Things (IoT) shall be able to incorporate transparently and seamlessly a large number of different and heterogeneous end systems, while providing open access to selected subsets of data for the development of a plethora of digital services. Building a general architecture for the IoT is hence a very complex task, mainly because of the extremely large variety of devices, link layer technologies, and services that may be involved in such a system. In this paper, we focus specifically to an urban IoT system that, while still being quite a broad category, are characterized by their specific application domain. Urban IoTs, in fact, are designed to support the Smart City vision, which aims at exploiting the most advanced communication technologies to support added-value servic

Wireless Smart Home Security System Based on Android ABSTRACT In recent years,smart home security industry has achieved rapid development, and people have increasing demand of smart home security system. While, because of traditional security systemrsquo;s technical limitations, which results in a single function, and the overall monitor could not be realized. Therefore, this paper mainly makes use of Android technology and ZigBee, Wi-Fi wireless sensor communication network, providing a flexible and convenient wireless solution for the construction of smart home security system. The system adopts modular idea, and achieves various function such as home environmental monitoring, video surveillance, fire automatic alarm, burglary automatic alarm, gas leakage alarm, intelligent control of household appliances and other functions, as a result, home life becomes more safer, more comfortable and more convenient. After experimental test, the system runs well and reaches the ex

Query Optimization for Massively Parallel Data Processing ABSTRACT MapReduce has been widely recognized as an efficient tool for large-scale data analysis. It achieves high performance by exploiting parallelism among processing nodes while providing a simple interface for upper-layer applications. Some vendors have enhanced their data warehouse systems by integrating MapReduce into the systems. However, existing MapReduce-based query processing systems, such as Hive, fall short of the query optimization and competency of conventional database systems . Given an SQL query, Hive translates the query into a set of MapReduce jobs sentence by sentence. This design assumes that the user can optimize his query before submitting it to the system. Unfortunately, manual query optimization is time consuming and difficult, even to an experienced database user or administrator. In this paper, we propose a query optimization scheme for MapReduce-based processing systems. Specifically,

英语原文共 11 页， 脆性材料裂纹萌生与扩展数值模拟耦合准则的有限元实现 摘要：本文所提出的模拟脆性材料二维断裂过程的数值模型是基于有限断裂力学一般框架下的耦合准则（CC）所建立的。本文指出要预测固体断裂中裂纹的产生，既要满足能量条件，又要满足应力条件。在正确绘制潜在裂纹路径和最小化所有预测裂纹路径的势能方面，发展了特殊的数值方法。这项工作的创新之处在于能够描述一个或多个裂纹的萌生和扩展过程，而且可以解释缺陷的统计分布。通过几个数值算例验证了所提方法的有效性和精确度，这些算例的解在文献中是众所周知的或研究得很好的。 1.引言 固体断裂的数值预测是力学和计算科学中一个经典的挑战。在过去的二十年里，开发高效和精确的数值模型来模拟断裂运行得到了广泛的研究。尽

英语原文共 17 页， 四足机器人的运动控制--基于力分布的实时推理 ， LRI，信息学研究所，UFRGS，Av Bento Gon alves 9500，CP 15064，CEP 91501-970，Porto Alegre，RS，巴西 LAAS/CNRS，7 Av.du Colonel Roche，31077 Toulouse Cedex 4，法国 1999年2月23日接收；1999年11月11日修订本接收 由F.C.A Groen发表 摘要 本文探讨了规则的应用。基于推理实时管理四足机器人的力分配计算和控制。该控制采用输入-输出线性化的控制子系统，而最优线性控制在整个运动系统中，力的分配方法为运动控制提供了更多的适应性和灵活性。因为这个系统能够快速适应各种各样的情况。给出了关于如何处理步行事件和脚力计算的规则。基于规则的推理是使用Elsevier Science BV出版的Kheops系统(LAAS)e 2000编写的。 关键词：有足机器人；位置概念控制；自适应运动实时力分布；

英语原文共 7 页， 基于分布式光纤技术的圆形贴片传感器 用于拉伸和弯曲载荷识别的光学技术 莫妮卡·西米内洛（Monica Ciminello），保罗·贝蒂尼（Paolo Bettini），萨尔瓦多·阿梅杜里 （Salvatore Ameduri）和安东尼奥·康西里奥（Antonio Concilio） 摘要——本文介绍了名为MonitoRing的智能贴片传感器的设计，制造和初步测试。该传感器被设计为通过沿其圆形几何形状 的分布式应变轮廓检测来识别结构载荷的幅度和方向。该传感器是通过使用装有单个标准电信光纤的柔性玻璃/环氧树脂层压板制造的。光纤根据三个半径和报价均不相同的环路嵌入，传感器粘合在一个结构元件上，可以跟随拉伸和弯曲载 荷而变形。光学瑞利反向散射技术可在整个光纤路径上以高 空间分辨率提供对应变的询问。因此，通过比较每个回路的变形频谱的�

英语原文共 14 页， 一种低成本且鲁棒性强的Canny边缘检测算法FPGA实现 摘要 在目前现有的计算机视觉算法中，Canny边缘检测算法明显优于许多边缘检测技术。但是，Canny边缘检测算法实现复杂，计算耗时长且资源占用高。为了克服这些问题，本文提出了一种新颖的Canny边缘检测算法，该算法在硬件层级上以相同的精度检测边缘。它使用Sobel算子，并使用近似法来计算梯度值和方向，降低算法的复杂度并以此降低硬件资源的使用，以实现非极大值抑制，自适应阈值的和现有的双阈值门限法。引入流水线级操作以减少延迟。该算法在Xilinx Virtex-5 FPGA上实现，与帧级Canny边缘检测算法相比，具有更好的性能。与现有的分布式Canny边缘检测算法相比，该合成架构将运算时间减少了6.8％，并能利用更少的资源来实现512times;512图像的边缘检测。

英语原文共 30 页， 使用React进行跨平台移动软件开发 摘要：本研究的目的是了解React Native是什么，以及如何使用它来开发跨平台的移动应用程序。本研究以原始文献为基础，阐释了React Native的概念和主要特征。主要功能包括虚拟DOM、组件、JSX、props和state。我发现React Native很容易入门，而且非常适合web程序员。它使得移动编程的开发过程比传统的本地方法简单得多，很容易理解为什么它迅速流行起来。然而，React Native仍然是一项正在快速发展中的新技术，要完全了解正在发生的事情，最好在进入React Native之前掌握一些JavaScript知识，也许还需要React（针对Web）。 关键词：React Native，移动应用程序开发，React，JavaScript，API 1引言 全球智能手机市场主要由两大操作系统主导，谷歌的安卓系统和苹果的iOS系统。2016年第二季度