Design of the low power wake-up receiver for internet of things communication

A wake-up receiver with high energy efficiency and low power consumption is proposed for solving the power consuming problems of wireless nodes communication in the Internet of Things. The proposed wake-up receiver based on the wake-up mechanism can effectively schedule the network nodes communication, and use the simple envelope detection structure to achieve frequency down-conversion, which can flexibly manage energy and reduce power consumption. Based on UMC 65nm CMOS process technology, the wake-up receiver is designed and simulated. The results show that it can achieve S₁₁ of -21dBm and a sensitivity of -75dBm at a data rate of 1Mb/s, when operating at the central frequency of 780MHz and input signal adopting an on-off keying (OOK) modulation, and the power consumption is 82μW at 1.2V voltage supply.     

伸缩臂起重机液压控制的新趋势

从对现代化大型系列越野轮胎起重机的运动性能、起重性能和附加的要求出发,针对小型和大型两种起重机进行分析,给出主控制和回转机构控制的控制方案及发展趋势。     

强油非导向变压器热特性分析及优化设计

本文中作者借助流体软件对强油非导向变压器进行了热特性分析,并对变压器内部散热油路及冷却器进行了优化设计.     

Oxidation Performance of Fe-Al/WC Composite Coatings Produced by High Velocity Arc Sprayed at 650 ℃

Fe-Al intermetallics with remarkable high-temperatureintensity and excellent erosion,high-temperatureoxidation and sulfuration resistance are potential lowcost high-temperature structural material.ProducingFe-Al/WC composite coating by high velocity arcspraying(HVAS)on structural materials would notonly obviate the problems faced in fabrication of thesealloys into useful shapes,but also allow the effectiveuse of their outstanding high-temperature performance,which might thus promisingly mak…     

高线粗中轧机"浮动"检测结构设计及故障排除

为克服轧制中因机架锁紧功能降低而产生的机架沿轨座轴向移动的"浮动"现象,对其产生原因进行了分析,并通过改进锁紧装置结构及相关部件,使"浮动"故障得到预防和有效控制并及时排除。     

薄壁防渗墙施工工艺

结合建造薄壁防渗墙工程实例,通过分析几种施工工艺的成墙原理和优缺点,合理选择薄壁防渗墙施工工艺。     

任务多变情况下技术团队隐性知识管理策略

很多以技术性活动为主的团队所执行的任务环境多变,无论是地形、气候或者是人员、设备的变化非常规问题地多发,会对其知识管理尤其是隐性知识管理带来一定影响。本文提出将承载着隐性知识的非结构化文档以数列集合的方式表达,能够便于管理和决策。     

电站磨煤机齿轮磨损防护技术应用研究

分析了火电厂筒式钢球磨煤机传动齿轮磨损的机理,介绍了堆焊、热喷涂和润滑处理3种磨损防护方法,结合火电厂的实际应用,根据磨损程度的不同,提出端面换向法、等离子喷涂法、堆焊修复法与高级重负荷工业齿轮润滑油润滑处理配合应用,可较好地解决煤机齿轮磨损问题.     

基于SuperMap IS技术的Web GIS实现

探讨利用SuperMap IS技术构造Web GIS的方法,以及在此基础之上如何利用SuperMap IS提供给用户的客户端开发模版进行Web GIS开发.