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拖拉机的不拆卸诊断技术,在监测机车状态和查找故障过程中,可以减少拆卸对机车造成的损伤,提高拖拉机故障诊断效率。本文重点介绍了感官诊断法和仪器设备诊断法。 相似文献
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直观诊断法就是通过原地或道路试验,靠观察和感觉或者采用简单工具来确定农用运输车故障的方法。采用这种方法来诊断农用运输车的技术状况和故障具有投资少且不需要专用设备的优点,因此被机手及维修部门所普遍采用。 采用直观诊断法诊断农用车故障时应先搞清楚故障的症状,有何特征及伴随情况,最后由简到繁,由表及里,逐步深入,进行推理分析,最后做出判断。这种诊断法可简单归纳为六个字:问、看、听、嗅、摸、试。 相似文献
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直观诊断法就是通过田间或道路试验 ,靠观察和感觉或者采用简单工具来确定农用运输车故障的方法。采用这种方法来诊断农用运输车的技术状况和故障 ,具有投资少且不需要专用设备的优点 ,因此 ,被机手及维修部门所普遍采用。采用直观诊断法诊断农用车故障时 ,应先搞清楚故障的症状、有何特征及伴随情况 ,由简到繁 ,由表及里 ,逐步深入 ,进行推理分析 ,最后做出判断。这种诊断法可简单归纳为六个字 :问、看、扣、嗅、摸、试。问 :就是调查情况 ,除驾驶员诊断自己所驾驶车辆的故障外 ,任何人在诊断故障之前 ,都必须先问明情况。如车辆已行驶的里… 相似文献
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王文莉 《农业装备与车辆工程》2001,(4):23
直观诊断法就是通过原地或道路试验 ,靠观察和感觉或者采用简单工具来确定农用运输车故障的方法。采用这种方法来诊断农用运输车的技术状况和故障具有投资少且不需要专用设备的优点 ,因此被机手及维修部门所普遍采用。采用直观诊断法诊断农用车故障时应先搞清楚故障的症状 ,有何特征及伴随情况 ,最后由简到繁 ,由表及里 ,逐步深入 ,进行推理分析 ,最后做出判断。这种诊断法可简单归纳为六个字 :问、看、听、嗅、摸、试。问 :就是调查情况。除驾驶员诊断自己所驾驶车辆的故障外 ,任何人在诊断故障之前 ,都必须先问明情况。如车辆已行驶的里程… 相似文献
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在节假日高峰负荷保电中,如何快速诊断故障设备,是每一位检修电工必须掌握的技能。笔者根据多年的工作经验,总结出故障快速诊断方法"五步"诊断法,即"看、嗅、听、问、诊"五个步骤。加快了设备故障处理速度,缩短了故障停电时间。1"五步"诊断法一"看"。工作人员到达现场,首先看安全措施是否到位,再开始检 相似文献
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故障诊断就是通过检查来对故障确诊。在农用车修理工作中，要想在短期内诊断出故障，感官诊断法是比较方便的，其诊断原理是通过看、闻、听、摸等方法，确定故障所在。 相似文献
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介绍了汽车电控发动机系统故障诊断的特点及方法。阐述了如何进行仪器诊断与人工诊断,并提出把两种诊断法有机地结合起来才能迅速准确地发现故障,并予以排除。 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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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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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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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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M. G. Bos H. van den Bosch H. Diemont H. van Keulen J. Lahr G. Meijerink A. Verhagen 《Irrigation and Drainage Systems》2007,21(1):1-15
The rural sustainability index is a scientifically based tool to quantify the performance of agriculture. The sustainability
of crop production is quantified from three perspectives; people, planet and profit. Within each perspective, one condition
was selected that must be met to warrant agriculture. These are: No hazardous work should be used within the crop production
chain; agricultural crops should not be grown on land allocated to nature by national law or regulations and, when a GM-crop
is present or is introduced in a region, it should not harm development opportunities of other farmers. If these excluding
conditions are met, the sustainability of agriculture is assessed through five performance indicators on school attendance,
water use and consumption, fertilizer use, pesticide use, and farm income. For each of the five indicators, critical values
and target values have been given that limit the transition range between non-sustainable and sustainable production. The
five indicators are combined into a sustainability index. The index aims at improving the socio-economic position of farmers
while protecting the environment.
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