基于GPS和GIS技术的智能巡检系统

电力系统中运行的各种电气设备,如果巡检不到位,就不能完全发现设备存在的缺陷.如何保证人员巡视到位,提高巡检质量,及时发现异常和缺陷,是供电企业管理者必须思考的问题.基于GPS(全球卫星定位系统)和GIS(地理信息系统)技术的智能巡检系统的出现,很好地解决了这个问题.     

配电线路智能巡检系统

结合当前线路巡检管理的实际运行需求,设计开发出基于GIS和GPS的配电线路智能巡检系统。该系统创造性地集成了全球定位系统(GPS)、地理信息系统(GIS)、移动终端(平板)和计算机网络通信技术的最新研发成果,基于"移动信息平台"概念改造传统巡检工作模式,实现配电线路巡检管理的电子化、信息化和智能化,最大限度减少漏检、错检,确保电力线路长期高效稳定运行。1系统功能1.1设备类型     

基于GPS/GIS的输电线路巡检系统

为了解决巡检管理和缺陷管理工作中存在的问题、提高工作效率,变革传统巡检工作方式,提出基于GPS/GIS的输电线路巡检系统的建设方案。     

GPS线路巡检及运维管控系统

为提高配电线路巡检和管控效率,对基于GPS线路巡检及运维管控系统作了研究并应用于实际配电线路。该系统集软件、移动通信、互联网、数据库、卫星定位、信息采集、地理信息等技术为一体,为配电网运维管理工作提供了科学的保障手段。实践结果表明,2014年上半年盱眙配电线路故障跳闸率比2013年同期下降了66.64%,实现了电力系统的长期安全稳定运行。     

基于北斗卫星导航系统的林区智能巡检测绘系统研究

森林巡检是森林资源调查、灾情预警、生态保护的重要工作,其中巡检面积的有效测绘及林区样地采集对于林区管理尤为重要。针对目前国内外森林巡检、林区面积测绘及样地采集技术存在效率和准确性不高的问题,提出了基于北斗卫星导航系统定位技术,结合Android智能操作系统进行智能化巡检的策略,提出了智能优化森林巡检任务路径规划方法、森林巡检面积计算方法以及智能样地采集方法。搭建了基于"互联网+"的林区智能巡检网络平台,利用BD-228型定位模块与STM32芯片搭建位置信息获取的定位终端,利用距离偏移过滤算法剔除误差大的定位漂移点,并将采集的球面经纬度坐标投影为墨卡托平面公里网坐标用于面积计算,最后采用矢量三角面积算法计算巡检轨迹的闭合区域面积,同时利用墨卡托正反算法实现了样地坐标智能采集。经多地区、多次实地试验验证分析,该系统巡检面积测算平均相对误差小于2%,样地采集平均相对误差为2.21%,满足森林工程测绘的需求。     

王甫州水电厂条码巡检系统

为满足水电厂现代化巡检管理工作的需要，防止巡检工作疏漏和提高设备巡检数据利用率, 开发了一种实用、先进的巡检工具——条码巡检系统。该系统采用便携式数据采集仪采集其参数以及用数据库的方式来管理，不仅可减少巡检工作量, 而且可有效提高巡检到位率, 减少因巡检疏漏所引发的故障。系统可接入监控系统或MIS系统, 并分析设备运行趋势, 查看任意两参数间的关系曲线, 供运行和管理人员决策参考, 以便及早发现设备缺陷, 确保水电厂设备运行安全。     

变电站智能巡检机器人导航算法改进

随着北斗三号卫星导航系统全球组网成功,北斗地基增强系统已基本实现国内区域全覆盖,可具备厘米级高精度定位能力.基于变电站巡检业务场景需要,文章针对常用的机器人导航方式进行了分析,提出了一种使用北斗地基增强系统并辅以视觉导航的巡检机器人导航方法,可以实时有效地对智能巡检机器人的运动姿态进行控制,满足变电站智能巡检机器人巡检...     

基于MIS和RFID技术的巡检系统

随着智能电网技术的不断发展,变电站逐步向无人化、智能化方向发展。为提高变电设备运行可靠性,通过利用计算机、网络、RFID等技术与生产MIS系统对接,建设变电站设备巡检系统。该系统实现了缺陷填报的及时性,巡检工作的方便性,巡检工作的全面性、快速性,系统应用的可扩展性,降低了设备巡视人员工作量,从而提高变电设备巡视的工作效率。     

基于ARM的便携式电力巡检仪的研究与设计

线路巡检工作是电力企业提高供电可靠率、保障系统安全运行的重要手段。以开发便携式线路巡检仪为目标,给出了基于ARM的硬件设计方案,研究了GPS数据采集．导航、巡线记录管理等软件功能的实现,对提高电力巡检工作的技术水平有实用价值。     

基于GIS平台的电力智能巡检系统

针对县级供电企业尤其是农村配电线路分布分散、巡检任务量大这一课题,通过建设应用GIS平台的电力智能巡检系统的思路解决了巡检到位监督、巡检信息孤岛壁垒、巡检工作强度大等一系列问题。该系统在沈阳沈北新区已成功实施,并取得良好的经济效益和社会效益。     

Overland water and salt flows in a set of rice paddies

Cultivation of paddy rice in semiarid areas of the world faces problems related to water scarcity. This paper aims at characterizing water use in a set of paddies located in the central Ebro basin of Spain using experimentation and computer simulation. A commercial field with six interconnected paddies, with a total area of 5.31 ha, was instrumented to measure discharge and water quality at the inflow and at the runoff outlet. The soil was classified as a Typic Calcixerept, and was characterized by a mild salinity (2.5 dS m⁻¹) and an infiltration rate of 5.8 mm day⁻¹. The evolution of flow depth at all paddies was recorded. Data from the 2002 rice-growing season was elaborated using a mass balance approach to estimate the infiltration rate and the evolution of discharge between paddies. Seasonal crop evapotranspiration, estimated with the surface renewal method, was 731 mm (5.1 mm day⁻¹), very similar to that of other summer cereals grown in the area, like corn. The irrigation input was 1874 mm, deep percolation was 830 mm and surface runoff was 372 mm. Irrigation efficiency was estimated as 41%. The quality of surface runoff water was slightly degraded due to evapoconcentration and to the contact with the soil. During the period 2001–2003, the electrical conductivity of surface runoff water was 54% higher than that of irrigation water. However, the runoff water was suitable for irrigation. A mechanistic mass balance model of inter-paddy water flow permitted to conclude that improvements in irrigation efficiency cannot be easily obtained in the experimental conditions. Since deep percolation losses more than double surface runoff losses, a reduction in irrigation discharge would not have much room for efficiency improvement. Simulations also showed that rice irrigation performance was not negatively affected by the fluctuating inflow hydrograph. These hydrographs are typical of turnouts located at the tail end of tertiary irrigation ditches. In fact, these are the sites where rice has been historically cultivated in the study area, since local soils are often saline-sodic and can only grow paddy rice taking advantage of the low salinity of the irrigation water. The low infiltration rate characteristic of these saline-sodic soils (an experimental value of 3.2 mm day⁻¹ was obtained) combined with a reduced irrigation discharge resulted in a simulated irrigation efficiency of 60%. Paddy rice irrigation efficiency can attain reasonable values in the local saline-sodic soils, where the infiltration rate is clearly smaller than the average daily rice evapotranspiration.     

瓦房店市水果生产标准化发展研究

瓦房店市是我国重要的水果生产基地,在国内水果生产领域占有重要地位。随着水果市场化的不断深入,如何满足和适应国内外市场需求成为瓦房店市水果生产的关键问题。从瓦房店市水果生产实际出发,阐述了实施水果生产标准化的必要性,提出了发展水果生产标准化的具体措施。     

金谷子耐旱TG118引种试种及推广应用

对引进的谷子新品种金谷子耐旱TG118进行品种比较试验和多点试种。结果表明：该品种抗旱、耐瘠、适应性强,稳产、高产、抗病抗风抗倒伏强,品质优良,粮草兼用,种植简单,省工易管;一般产量在6000kg/hm2以上,比当地主栽品种增产20%以上。最高产量达9450kg/hm2,适于在辽西北地区推广应用。     

对《种子法》存在问题的探讨

《种子法》是我国种植业第一部法律。自实施以来,为依法加强种子管理提供了有力的法律支撑,促进我国种子产业发生翻天覆地的变化。但随着依法管理工作的深入和种子产业的快速发展,《种子法》及配套规章的一些问题逐步显现出来。对《种子法》及配套规章存在的问题进行深入分析,对需要进一步补充的章节以及需要调整的内容进行深入探讨,以求更加完善和明确。     

Review of the Egyptian experience in implementing land drainage projects

About 30 years have passed since the Government of Egypt embarked on implementing a series of large scale drainage projects. At present, about 3.8 million acres have been provided with drainage systems on the basis of systematic pre-drainage investigations and designs. The target is to provide drains in approximately 6.4 million acres in the Nile Valley and Delta.The implementation of the subsurface drainage system is carried out by the public sector and private contractors under direct supervision of governmental regional departments. The implementation process depends on many factors related to the drainage material, machinery, manpower, site requirements, farmers and organizations involved. Problems and constraints are sometimes challenging, however, the annual rate of implementation has gradually increased to 170,000 acre/year.This paper discusses the different aspects involved in the implementation process of drainage systems. The development in materials, machinery and construction technologies will be reviewed. Institutional and management factors are going to be also considered.     

和谐社会理论建设的几点哲学思考

在新世纪,面对机遇和挑战,党的十六大把“社会更加和谐”作为全面建设更高水平的小康社会的一个重要目标。中国人素有社会和谐的理想;西方人自古也向往社会和谐;借鉴东西方两种和谐社会思想的经验、教训,构建社会主义和谐社会理论。     

A European irrigation map for spatially distributed agricultural modelling

We present a pan-European irrigation map based on regional European statistics, a European land use map and a global irrigation map. The map provides spatial information on the distribution of irrigated areas per crop type which allows determining irrigated areas at the level of spatial modelling units. The map is a requirement for a European scale assessment of the impacts of irrigated agriculture on water resources based on spatially distributed modelling of crop growth and water balance. The irrigation map was compiled in a two step procedure. First, irrigated areas were distributed to potentially irrigated crops at a regional level (European statistical regions NUTS3), combining Farm Structure Survey (FSS) data on irrigated area, crop-specific irrigated area for crops whenever available, and total crop area. Second, crop-specific irrigated area was distributed within each statistical region based on the crop distribution given in our land use map. A global map of irrigated areas with a 5′ resolution was used to further constrain the distribution within each NUTS3 based on the density of irrigated areas. The constrained distribution of irrigated areas as taken from statistics to a high resolution dataset enables us to estimate irrigated areas for various spatial entities, including administrative, natural and artificial units, providing a reasonable input scenario for large-scale distributed modelling applications. The dataset bridges a gap between global datasets and detailed regional data on the distribution of irrigated areas and provides information for various assessments and modelling applications.     

粉质仪和拉伸仪在面粉生产中的应用

在介绍粉质仪和拉伸仪结构和原理的基础上,探讨了粉质曲线中吸水率、形成时间、稳定时间、弱化度和评价值等指标与面粉品质的关系,以及如何根据拉伸曲线中面团最大拉伸阻力、延伸度和拉伸曲线面积等指标来评价面团品质,并结合生产实际,概述了粉质仪和拉伸仪在面粉生产中的作用。     

农村信息化服务的现状及建设措施

分析当前我国农村信息化服务的现状,提出加强农村信息化服务的新举措。     

车辆ABS控制算法的研究及探讨

对现代汽车的ABS控制算法作了一些简单的介绍,同时指出了它们的一些缺陷,相应地提出了几种对ABS的其它控制方法并加以探讨,其中着重论述了ABS门限值控制算法中参考车速的确定方法和基于附着系数的控制算法。