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基于Google Maps的农业机械作业轨迹监测系统 总被引:1,自引:0,他引:1
为满足现代农业机械管理需要,实现农业机械作业调度与实时监控,运用GPS、GPRS和Google Maps技术进行有机集成,构建了农业机械作业轨迹监测系统.该系统采用单片机整合GPS模块、GPRS模块实现车载GPS数据无线远程回传,通过Google Maps API构建Web GIS系统,采用ASP.NET实现农业机械田间作业管理;以Web Service技术及Ajax技术实现作业轨迹回放、作业实时定位及长度、面积测量等功能. 相似文献
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周宇航 《国际沙棘研究与开发》2021,(6):68-72
本文依托辽宁省水资源管理系统,集成以环境流量计算与评估预警模型为核心,基于数据库技术、GIS技术和三维可视化技术的太子河流域环境流量管理系统,形成具有流域水环境系统仿真情景展示、模型驱动、信息查询、成果科学可视化与动态演示、流域环境流量保障决策支持等功能的流域水资源管理业务化平台.该平台可为管理部门提供决策依据. 相似文献
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针对大型城市水源系统规模庞大且结构复杂、调度管理工作繁琐、调度决策计算量大等问题,通过开发城市水源的调度管理与决策支持系统,提高城市水源调度管理科学技术水平,是强化城市供水安全保障的有效途径。本文以深圳市的原水调度系统设计开发为例,分析城市水源调度管理系统的业务需求,设计系统的功能结构体系,开发系统功能模块,阐述了系统开发中实时监视模块、水厂需水量预测模块和水源调度模型设计等核心模块的设计思路,最后介绍系统在深圳水源调度中的应用。本文研究为我国城市水资源管理与水源调度管理系统的建设提供技术支撑与方法储备。 相似文献
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GIS系统集成技术在农业工程信息系统中的应用 总被引:7,自引:1,他引:7
采用GIS系统集成技术设计开发了新疆塔里木盆地世界银行贷款二期农业工程项目中的阿克苏地区子项目信息系统,由PowerBuilder数据库开发平台与MapInfo地理信息系统集成设计完成。该系统主要完成基于GIS的日常农业工程项目管理工作,以地理信息系统的操作方式作为主要操作方式。MapInfo的集成应用主要是利用MapInfo提供的OLE Automation技术,来完成在地图嵌入、事件响应、工程信息显示、工程空间数据维护等方面的系统功能设计。 相似文献
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网格GIS在大型灌区信息化建设中的应用 总被引:9,自引:4,他引:9
介绍灌区网格GIS系统框架和功能,包括灌区信息标准、规范与共享;空间数据库群和业务数据库集成管理;灌区网格GIS系统主要功能等方面的内容。在系统中,数据库群之间的集成依靠虚拟数据库技术和联邦数据库技术。系统功能主要有信息查询、统计、空间分析,以及用于制定灌区规划。 相似文献
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Overland water and salt flows in a set of rice paddies 总被引:1,自引:0,他引:1
E. Playn O. Prez-Coveta A. Martínez-Cob J. Herrero P. García-Navarro B. Latorre P. Brufau J. Garcs 《Agricultural Water Management》2008,95(6):645-658
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. 相似文献
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车用发动机润滑油失效规律与更换周期研究 总被引:7,自引:0,他引:7
研究在正常使用条件下10W/30-QC级润滑油用于某型车用发动机时所表现的失效规律,确认期服从两参数Weibull分布,并给出分布的尺度参数η和形状参数m之最佳线性无偏估计(BLUE)同时,还为定量分析,计算车用发动机润滑油的使用可靠性和合理确定其更换周期提供了一套可供借鉴的方法,并给出了具体的计算实例。 相似文献
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赵国杰 《农业机械化与电气化》2011,(4):106-107
乡(镇)农技推广体系是农业发展的关键。介绍朝阳市农业技术推广体系的现状,针对目前体制及运行机制、服务手段等方面存在的问题,提出适合朝阳市乡(镇)农技推广体系改革与发展的对策,以期对全省农技推广体系改革和发展起到一些借鉴作用。 相似文献
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苑庆刚 《农业机械化与电气化》2010,(3):52-54
草莓果味酸甜爽口,营养价值高,为人们所喜爱的应市鲜果之一。由于草莓易受损伤和微生物侵染,因此其采收、贮藏过程极为重要。介绍草莓采收过程中的注意事项以及11种贮藏保鲜技术的实施步骤和操作方法,推介9种加工方式,为草莓产业化提供技术支持。 相似文献
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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。 相似文献
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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。 相似文献
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对《种子法》存在问题的探讨 总被引:1,自引:0,他引:1
李鹏 《农业机械化与电气化》2011,(6):129-130
《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。 相似文献
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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。 相似文献
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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. 相似文献