基于物联网的农田环境监测无线传感器网络的管理

针对农田环境监测无线传感器网络中网络节点电量和处理能力有限等特点,分别从网络拓扑管理、位置管理、能量管理和故障管理等4个方面提出了一套完整的网络管理方案,以对网络运行状况进行监测和管理。为了用户能够远程监控和管理无线传感器监测网络,开发了远程监控管理平台,该平台由后台数据库和前端监测管理软件组成。试验结果表明,所提出的网络管理方案,能够实时监测网络的运行情况,及时诊断网络中的异常,保障了网络正常运行、数据实时传输;所开发的远程监控管理平台人机交互界面良好、功能完善、运行稳定,实现了用户对无线传感器监测网络的远程管理和对农田环境的有效监测。     

基于农业物联网的农田土壤环境监测系统的研究与设计

农业物联网是利用各种仪器仪表与传感器参与到农业各种控制自动化的物联网。主要内容是利用物联网(IoT)相关技术开发出一套农田土壤环境监测实时系统,内容包括系统的技术路线、系统设计、开发实现。在系统的实现过程中,通过WSN与4G网络相结合,实现农田土壤温湿度、盐碱度、PH值等土壤环境信息的自动化采集与存储。     

Studies on Information Network of Quality Management in Building Engineering

With improvement of construction management and development of computer and network technologies, network technologies are being widely applied in building engineering. This paper discusses how to apply database technology and network technology to design and develop information network systems of building engineering and combine the advanced management methods with computer network technology to share the quality information in construction industry. The solution given by this paper is useful and can be extended to and used in other systems.     

安徽省冬小麦长势遥感监测与评估方法研究

沿淮淮北是安徽省主要的冬小麦种植区,为了对该区域冬小麦长势进行实时、动态地监测,通过采用变化向量分析方法,利用2005-2010年EOS/MODIS数据,在HANTS算法重构无云NDVI时间序列图像以及安徽省冬小麦种植区提取等数据处理基础上,研究基于NDVI变化向量、曲边梯形面积的长势综合监测模型,对研究区的年际与年内长势变化进行时间和空间上的定量分析。结果表明：HANTS处理平滑后的MODIS的10天合成植被指数的年时序曲线有效消除了云和数据缺失的影响,重构后的生长曲线可以更清楚地反应作物生长变化趋势和规律,有利于监测模型的建立;冬小麦种植区提取,大大提高了卫星监测精度,构建的综合监测模型适合单一生长季苗情长势遥感监测,该模型在2011年冬小麦长势评估中取得了良好的监测效果。     

The Analysis of Projects of CCHP System in the Building

The Tujia people have a long history and unique cultural traditions.The folk-house art found in western Hubei Province,P.R.China,is a typical representation of Tujia culture.Its external form,inner dealings,and its fit with the nature not only are the results of a perfect combination of practicality,aesthetics,and the combination of buildings with the environment,but these traits also embody the Tujia people's understanding of life and beauty.This article tries to find the deep-seated cultural foundations and spirits of Tujia traditional housing by researching and analyzing the aesthetic characteristics of its architectural form.The article also takes in the design essence of Tujia traditional housing for use in modern construction.     

Design and Application of the Electronic Flight Bag System

At first, this paper introduces the EFB. Then it introduces the EFB manufacturers and three airlines’ applications of EFB. To make the content simple and clear, the paper presents a contrast table on EFB’s hardware and software. According to the comparative of analysis, the Analytic Hierarchy Process and Excel’s calculation, the paper gets weight coefficient as a theory of EFB design.     

Analysis of IC Management System of Computer Room

This paper analyzes the features of existing IC management system of computer room, deficiencies and new orientation in this domain. The structure and realization of a new system developed by the authors was introduced. Meanwhile, this paper analyzes the electronic school schedule. Finally, the features of new IC management system of computer room are analyzed.     

北方果树霜冻害远程监控与报警系统初步研究与实现

为提高北方果树防霜冻害管理水平,基于物联网架构,设计实现了北方果树霜冻害监测与报警系统。该系统结合实时获取果树生长环境数据,及果树霜冻害发生规律和专家知识库,为用户提供远程果树环境信息分析和霜冻害智能诊断服务。同时为满足不同生产条件需求,结合用户需求和环境状况,提供自动报警。根据用户随时随地获取信息的需求,基于多种网络技术等(如Internet、android等移动互联网),开发了可用于PC终端、移动终端(如智能手机、平板电脑等)多平台管理模式。通过提供现场综合远程实时监控、数据采集、网络传输、数据管理分析及报警预警等功能,系统实现了对果树生长的全方位多功能的远程监控与综合管理,有效提高了果树防霜冻害监控管理水平。     

社会网络分析法在城镇工程基础设施健康评价中的应用

针对工程性基础设施网络拓扑结构不合理导致的全局性破坏问题,将社会网络分析(SNA)方法的密度、凝聚子群、K-核、Lambda集合、切点和中心度等计算概念引入基础设施网络拓扑结构评价,提出了由网络完备度、层级边关联度、局部稳定成份比例、节点脆弱性、荷载运行均衡度等指标构成的评价体系。通过对重庆长寿城区的电力基础设施实例研究发现,社会网络分析方法能够对设施网络拓扑结构与电网运行过程中的稳定性进行客观评价,能够找出电网过载点、对设施网络拓扑结构的紧凑程度和完整程度进行评价以及对网络整体的性能做出评价。     

Study on Broadband Cellular Mobile Communication System OFDM Based

The characteristic of broadband mobile channel is analyzed, then we construct a model of bidimensions wideband mobile channel based on delay and Doppler frequency domain. On the basis of describing OFDM theory, the design on initial physical layer of broadband cellular mobile communication systems is proposed. Simulation for base band system is ground on channel model proposed above. The results of experiment and simulation are relatively inosculated, which manifest the well prospect of the communication system proposed for future application.     

USSD Technology and Its Application of Mobile Telecommunication System

This paper concludes the technique and application character of USSD, the related network structure of USSD platform, explains the handle flow of the interactive response of USSD. By analyzing the application type in mobile communication and market benefit of USSD, combining the feature of USSD service platform, it presents the infrastructure of USSD system and application, including composing of core system, deployment of application (assignment of service code, suitable application type and market benefit), and the influence and change to the existent network.     

Nonlinear Forecast System for River Water Pollution Based on GIS

Based on the analysis of the water pollution spatial distribution characters of Yangtze River in Chongqing,a new method based on the integration of BP neural network and genetic arithmetic(GA) is proposed.For some shortcomings existed in the standard BP neural network,this method has ultimately overcome these shortcomings by combining the GA with BP artificial neural network through altering stimulating function,adding momentum factor to power value for BP algorithm and introducing genetic arithmetic to searching for the knots of the hidden layer,momentum factor and learning level.Using this method can easily overcome the difficulty of measuring the water prediction model's parameters.GIS is used as a tool for data management and spatial analysis,and the prediction result of the model for the water pollution spatial distribution characters of Yangtze River in Chongqing is visualized and explored with the precision of more than 78%.     

三角形强化栽培模式下氮肥运筹对II优498产量及氮肥利用的影响

以大穗型杂交籼稻II优498为材料,在三角形强化栽培(triangle-planted system of rice intensification, TSRI)适宜的密度和秧龄条件下,研究施氮量和施肥比例对TSRI结实期叶面积、光合作用以及干物质积累与转运的影响,并探讨花前期物质积累转运与花后期光合生产在产量形成过程中的作用,同时探索既能提高产量又能减少氮肥损失的氮肥运筹措施。结果显示,TSRI下,除蜡熟期叶面积指数(leaf area index, LAI)外,施氮量和施肥比例对光合作用和LAI有显著运筹作用; 增施氮肥和氮肥后移可以显著提高齐穗期和蜡熟期剑叶净光合速率,LAI则随施氮量和氮肥后移程度增加多呈抛物线趋势。TSRI下施氮量和施肥比例共同提高总颖花数增加产量,而施氮量和施肥比例又各自通过提高千粒重和结实率来增加产量。TSRI下,花前干物质积累量、物质转运量、转运率与产量极显著正相关,施氮量为150 kg hm^-2, 穗肥占总施氮量的30%的处理在显著增大花前干物质积累量和籽粒灌浆期间向穗部的转运量实现高产的同时显著提高氮肥农学利用率和生理利用率,是TSRI平衡产量与氮肥利用率的最优氮肥运筹组合。