城市人行地道现状及设计对策分析

对城市人行地道的优缺点进行了分析,提出了一些设计对策,指出人行地道的设计应作为城市空间节点的组成部分来考虑.     

探析节点对城市空间秩序的规范性

城市作为人类社会的外化产物,其空间内或显性或隐性地存在着秩序.节点是城市空间的重要组成要素之一,节点根据功能关系形成不同的结构,通过场力的作用规范城市空间.在规划设计中,可通过建构节点来达到规范城市空间秩序的目的.     

基于WiFi构建的智能家居控制系统的设计

介绍了一种新型的基于WiFi构建的智能家居控制系统,系统采用PC主机和智能手机作为基本硬件平台,辅助WiFi智能插座,WiFi智能传感器,就可以实现智能家居控制系统。利用PC机做智能家居控制系统的中央处理器,手持终端设备(通常是智能手机)作控制媒介,实现对智能家居的控制。在系统的软件部分,PC机采用Linux或windows操作系统,使用JavaScript作为网络服务器脚本语言编写;智能手机采用通用的Android系统,采用java语言编写;它们及控制接口的Web通信采用Node.js技术实现。通过对系统进行性能测试,结果表明,系统运行稳定,实时性好,性价比高,具有一定的实用价值。     

Sound localisation ability of soldiers wearing infantry ACH and PASGT helmets

Helmets provide soldiers with ballistic and fragmentation protection but impair auditory spatial processing. Missed auditory information can be fatal for a soldier; therefore, helmet design requires compromise between protection and optimal acoustics. Twelve soldiers localised two sound signals presented from six azimuth angles and three levels of elevation presented at two intensity levels and with three background noises. Each participant completed the task while wearing no helmet and with two U.S. Army infantry helmets – the Personnel Armor System for Ground Troops (PASGT) helmet and the Advanced Combat Helmet (ACH). Results showed a significant effect of helmet type on the size of both azimuth and elevation error. The effects of level, background noise, azimuth and elevation were found to be significant. There was no effect of sound signal type. As hypothesised, localisation accuracy was greatest when soldiers did not wear helmet, followed by the ACH. Performance was worst with the PASGT helmet.     

基于CAN总线的电动自行车充电监控系统设计

本文对现有住宅小区电动自行车充电的收费管理模式进行分析,针对其存在的问题,提出了一种基于CAN总线的电动自行车充电监控系统设计。该系统主要由主控计算机、CAN总线适配卡和多个智能充电节点组成;管理员可以通过上位机操作,远程监控各充电节点,实现电量计算、通断控制以及用户数据信息存储等功能。     

钢管混凝土新型筒仓柱节点设计与有限元分析

结合筒仓结构的特点,设计一种新型的钢管混凝土节点型式,对节点的传力机理和力学性能进行分析,并提出了新型节点的初步设计（计算）方法,为工程设计人员在实际应用中提供思路和参考。并采用通用有限元软件ANSYS对节点进行非线性有限元分析,验证所建议节点的承载力。     

一种基于ROAN的无线传感器网络定位方法

节点定位是无线传感器网络的一项关键技术,为了提高精确度和避免使用对参数要求苛刻的传统算法,提出了一种新思路：基于ROAN（Ratio of Arrival Numbers,信号到达个数比）法。该法将原本需测节点间实际距离的难题,通过统计信号到达的数目,转化为计算距离比的模型,进而采用迭代法求解出位置信息。经过数学建模分...     

Transmission loss allocation through zonal aggregation

This paper presents a methodology for the aggregation of nodal generation loss factors into zonal loss factors, taking into account the geographic as well as the “electrical” proximity of the nodes to the zone centers. The annual net economic consequence (gain or loss) of each generator from the aggregation is estimated and used as an index for the evaluation of the methodology. Additionally, an algorithm for the automated zonal configuration with pre-defined economic consequences is presented. Starting from one zone comprising the whole power system, the algorithm finds the number of zones that keep the economic consequences of zonalization below a pre-defined threshold, and the resulting zonal configuration. By performing an exhaustive search using this algorithm for the “best” initial root node, an optimal zonal configuration can be identified that achieves the pre-defined level of economic consequences with the minimum number of zones. Numerical results from a real power system, the Greek power system, are presented and discussed.     

一种具备环网治愈功能的LTE数字基带射频拉远组网架构设计与研究

文章分析了目前数字基带射频拉远组网方式优势与弊端,提出了基于粗波分复用(CWDM)技术的LTE数字基带射频拉远环形组网架构,分析并给出了其组网架构的优越性。     

一种面向环保物联网汇聚节点的数据管理方法

物联网现场监测设备呈现出异构化、密集型格局,需要及时获取、处理并储存来自于环境的海量数据。为解决现场监测控制设备对实时数据的分布存储以及容量小的弊端,通过分析汇聚节点、感知节点工作的实际情况以及各种现场采集协议的特点,提出一种针对汇聚节点下位数据的管理方法,可以有效完成异构型监测现场的数据组织,便于嵌入式现场汇聚节点的处理和上报。该方法能够满足环保国标与现实应用的需求。