Ferguson机构动态测试确定运动曲线的起点   总被引：1，自引：0，他引：1  

刘常春  傅少川 《农业机械学报》1997,28(3):85-89

Ｆｅｒｇｕｓｏｎ机构动态性能检测非常重要高精度的检测必须由精确确定运动曲线起点作保证。本文提出实时找出点小邻域和离线数据处理逼近真实起点相结合的方法，分析了相应的系统误差，并给出了实验计算数据，该方法用于实验检测系统中取得较好效果。  相似文献   

水产科学实验原始数据处理的自动化技术     

朱艺峰 《福建水产》2001,(1)

应用 Microsoft Excel软件建立了对原始数据进行不同处理的工作表,通过工作表中的名称、公式、填充、链接、宏等技术,完成原始数据处理的自动化过程。  相似文献   

云南出口新鲜松茸产地属性DNA指纹图谱构建     

陈丽萍  ;杨玲春  ;陈芸  ;陈旭  ;岳亮亮  ;刘忠民  ;傅士华  ;郭永红 《中国食用菌》2014,(5):43-50

收集19个出口松茸主产地的97个样本,使用逆转录因子的DNA分子标签对样本基因组进行PCR扩增;为尽可能区分原产地,对某些产地的样本增加先使用限制性内切酶处理基因组DNA,再次使用逆转录分子标签的步骤。采用全自动DNA分析系统获得一系列DNA指纹图谱。通过比较分析找到同一地理居群共有的DNA指纹图谱特征以及酶切前后的图谱差异。这些指纹图谱特征与松茸原产地间存在显著相关性。  相似文献   

Accuracy of a machine-vision pellet detection system     

Kevin D. Parsonage  Royann J. Petrell   《Aquacultural Engineering》2003,29(3-4):109-123

Video cameras are employed on net pen fish farms for monitoring food pellet levels near the cage bottom. Herein, the accuracy of a new machine-vision system for the identification of a feed-wastage event and its response time are reported. Research involved novel tests and definitions, video footage recorded under different stocking and environmental conditions, and numerical filters to reduce the effects of misclassifications and patchiness of the pellet wastage record on overall system accuracy. Single-frame food pellet detection accuracy was based on the difference between computer-generated and actual frame counts of pellets greater than 30 pixels in size. A pellet wastage event was defined as a median of three or more visible pellets per frame. During tests on still video frames from different feeding events, the system missed 0.1±0.1 to 1.3±0.4 pellets frame⁻¹, and miss-classified as pellets 0±0.1 to 2.3±0.5 objects frame⁻¹ (n=264). Most missed pellet images were on top of fish images. Waste matter accounted for 65% of the misclassifications, while particles associated with poor camera maintenance accounted for approximately 24%. The average response time to a pellet wastage event was 5.1 and 11.4 s for sampling rates of 2 frames s⁻¹ and 0.5 frames s⁻¹, respectively (n=20 different pellet wastage events). The longest response time (26 s) occurred when fish were amassed against the camera and/or covering pellets. Using appropriate camera lens, camera positioning and/or ‘warning’ software can address fish-interference problems.  相似文献   

土壤水分特征曲线自动检测系统的设计与应用     

唐玉邦  徐磊  虞利俊  裴勤  王恒义  黄万喜 《农业科学与技术》2014,(11):2026-2029

[目的]为了更好地满足现代农业各种种植环境下作物对水分要求越来越精准,结合土壤含水量与土壤水分势能的概念,设计了土壤水分特征曲线自动检测系统。[方法]利用电子式土壤水分张力传感器实时测定供试盆钵中土壤水分的张力数值,同时采用电子式重量传感器测定土壤重量,利用差减法计算土壤含水量,并绘制土壤水分特征曲线。[结果]通过对江苏地区2种不同质地土壤实地测定得出：质地不同水分特征曲线走势不同,分别为：徐州地区黄河古道砂质土水分特征曲线关系式为 Y=-0.0002X3＋0.0277X2-1.6445X＋38.161,R2=0.9919;大丰金海农场盐碱土水分特征曲线关系式为 Y=-0.002X2-0.426X＋39.905,R2=0.9913。[结论]土壤水分特征曲线自动检测系统可以同时反应土壤含水量和土壤水分势能状况,可反映土壤水分对植物生长的有效性,为科学灌溉提供依据。  相似文献   

Structure Design of Large-scale Sow House with Fermentation Bed     

Bo LlU  Zhaolong Ll  Jianglin LAN  Qinlou HUANG  Jianyang TANG  Wenquan YU  Huai SHl 《农业科学与技术》2014,(10):1819-1825

ln this research, the whole contact-type large-scale sow house with fer-mentation bed was designed. The planning area of the entire piggery was 5 700 m2 with workplace and green belts. The sow house was 93 m long and 33 m wide, a total of 3 069 m2, including office area of 60 m2 and aisle area of 107 m2. The fer-mentation bed had an area of 2 902 m2 with length of 88.7 m and width of 27.7 m. lts area accounted for 95% of the total area of sow house. The fermentation mattress had a depth of 80 cm, and had a volume of 2 321 m3, equivalent to 733 t of coconut chaff and rice chaff. On a large fermentation bed, the areas for boars, replacement gilts, pregnant sows, obstetric tables, nursery pigs, etc. were designed. The large-scale sow house with fermentation bed was equipped with the automatic feeding system, automatic sprinkler system, automatic positioning column for preg-nant sows, sows＇ obstetric table system, fanning wet curtain cooling system, video monitoring system, environmental monitoring （light, temperature, water, humidity, CO2, NH3） and automatic control system. Every farming area was equipped with feeding trough and water trough. The water though was fixed with overflow pipe for removing the extra water. The house could hold 500-head sows. Each sow occu-pied 4.9 m2 of the fermentation bed in average. The designed sow house had a maximum annual output of 10 000 piglets.  相似文献   

安徽蚌埠“06.01”暴雨预报因子程序式预报     

武俊 《安徽农业科学》2014,(25):8667-8669

利用常规气象观测资料和简明暴雨预报因子程序,对2014年6月1日出现在安徽蚌埠市的暴雨过程进行诊断分析,中低层切变线、暖湿气流强烈辐合、充足的不稳定能量释放是形成暴雨元素,并用暴雨预报程序进行预报。  相似文献   

生物质原料自动输送系统     

车战斌  李大平 《安徽农业科学》2014,(35):12629-12632

主要针对粉末物料及成品颗粒的输送方式及工艺布局进行研究,从粉末物料的存储、破拱和运输过程等方面,对输送设备进行设计和试验.在进入成型机前,将秸秆类粉末物料的含水量调整到最适宜的范围并送入醒料仓内,后为将物料顺利送入料仓底部的输送绞龙内,在料仓的斜坡上加装了辅助落料装置,并对输送装置整体进行5次空载试验,完成最终装备研发设计,降低了生产成本和原料的损耗,减少了废料造成的空气污染,提高了原料的利用率,增加了收益.  相似文献   

电控电执行器自动变速器的开发研究     

李水良  闫守成  杜迎慧 《拖拉机与农用运输车》2010,37(4):62-63,66

从电控电执行器自动变速器的结构、工作原理及设计要点出发,对电控电执行器自动变速器的开发进行了研究,并对其执行机构电磁离合器的开发做了重点阐述。结合中国变速器的现状,对在中国进行电控电执行器自动变速器开发的可行性进行了论述。  相似文献   

使用JDBC实现自动气象站要素信息检索     

鲁玲 《安徽农业科学》2013,(29):11755-11756

介绍了使用JDBC实现自动气象站分中心站的气象要素信息检索，程序运用B／S体系结构，遵循MVC设计思想，采用Model2模式进行开发，为了提高程序的运行速度，在数据库中创建了存储过程。  相似文献