《园林工程制图》教材编著精析     

吴机际 《农机化研究》2004,(4):262-264

《园林工程制图》教科书运用工程图学的基本理论、基本方法和基本技能，结合园林规划设计及园林工程实际．规范和阐释园林工程图样。其拓展、创新的内容填补了国内外在该学科的空白．为该学科提供了可信的、可操作的教材和不可缺少的工程设计参考书。总结、剖析其拓展、创新亮点，启迪编著、研制文字及电子教材精品，必须密切结合社会实践，做到体系更新、内容创新、教学与学习方法革新。  相似文献   

关于等离子体种子处理技术的田间试验研究   总被引：4，自引：2，他引：4  

李社潮  姚淑先  孙锐  于亚珍 《中国农机化》2006,(1):74-76

本文阐述了等离子体种子处理技术机理,设计了田间试验示范操作规程,分析了试验工作特点,评述了实际成效,阐明了技术推广前景。  相似文献   

剪羊毛机剪头振动参数的测试研究     

王春光  胡瑞谦 《农业机械学报》1997,28(4):50-54

剪羊毛机剪头的振动属扭转振动，通过理论分析和测试，对剪羊毛机剪头及剪头各主要工作部件在工作中的扭振或激励进行了研究，这对研究剪羊毛机剪头的振动、减振降噪及改善其荼性能等均有重要意义。  相似文献   

刀具布置对茎秆切碎还田机振动的影响分析   总被引：7，自引：0，他引：7  

姬江涛  李庆军  蔡苇 《农机化研究》2003,(4):63-64

分析了影响茎秆切碎还田机振动的主要因素，并对典型机具的刀片排列方案进行了研究．从而提出了茎秆切碎还田机刀片排列的主要理论依据。  相似文献   

农机化与农业结构调整的适应性研究     

江波 《现代农业装备》2006,(1):46-51

本文阐述了农机化与农业结构调整适应性的内涵、特征与影响因素,并在分析过去与现在农机化与农业结构调整适应性问题的基础上,提出了今后农机化发展的适应性战略构思  相似文献   

神经网络模糊PID算法在温室温度控制中的仿真研究   总被引：2，自引：2，他引：2  

刘东利  王延耀  张建勇 《农机化研究》2006,(10):70-72

为了更好地实现对温室温度的控制,提出了温室温度控制的一种新的控制方法;通过仿真比较证明了此方法的有效性,并对其动静态特性、鲁棒性和抗干扰能力进行了探讨。结果表明,采用神经网络模糊PID算法的温室温度控制方法具有较好的动静态特性、鲁棒性和抗干扰能力。  相似文献   

基于关联规则的图书馆个性化服务研究     

苏坤 《农业图书情报学刊》2010,22(6):246-249

关联规则挖掘技术是一种新兴的数据处理技术,其算法及应用在图书馆中起着非常重要的作用。Apriori算法是关联规则挖掘的经典算法,在分析Apriori算法的基础上,提出利用FP-tree生成树技术来减少候选集的数量,克服Apriori算法的弱点,以提高图书馆个性化服务的效率。  相似文献   

New work study methods help to decide processing technique in logging     

《Scandinavian Journal of Forest Research》2012,27(1-4):569-574

The great variation in technical properties between and within trees indicate that the efficiency of logging would be enhanced if the processing technique is adapted to the varying quality of different trees and stem sections. To evaluate the suggested differentiation in processing technique, time studies must be performed that define exact time consumption for short stem sections. This paper exemplifies how videogrammetry and computer aided recording and processing of data can be used for detailed time studies. Recordings made in the field were later run for actual time studies indoors, using a digital watch recorded on the tape. The trees cut for the study were measured in detail, as well as the resulting logs. By registering detailed tree data, an important source of variation could be controlled and sample size kept reasonably low. The method proved to function well, especially for determining very short work elements.  相似文献   

植物病毒及脱毒研究之进展     

刘娜 《北京农业》2012,(21):80-81

植物病毒是一个极小的微粒.近几十年来,有关植物病毒的研究已取得很大的进展,对某些作物病毒的症状、寄生范围、传播途径、病理现象、鉴定方法及无毒苗培育途径等均已进行了深入的研究.  相似文献   

Accumulation and Mobility of Salts in Soil as Influenced by Primary Biomethanated Spentwash     

《Communications in Soil Science and Plant Analysis》2012,43(22):2947-2963

A soil column laboratory experiment was carried out at the central campus, Mahatma Phule Agricultural University, Rahuri, India during 2008–2009 to study the accumulation and mobility of salts in Typic Haplusterts as influenced by primary biomethanated spentwash (PBSW). The PBSW was applied in three different levels (0.5, 1.0, and 2.5 cm) and then tap water with low salinity and low sodium hazard (C₁S₁ class) was used to carry out leaching in four different levels of water at the pore volume of soil (WPVS) (0.5, 1.0, 1.5, and 2.0). The electrical conductivity (EC) in the soil increased significantly with increasing levels of PBSW and decreased with increasing levels of WPVS in surface (0–15 cm deep) and subsurface (15–30 cm deep) soil layers. The exchangeable calcium (Ca²⁺), magnesium (Mg²⁺), and potassium (K⁺) increased, whereas exchangeable sodium (Na⁺) decreased with increasing levels of PBSW and WPVS in surface and subsurface layers of soil. The organic carbon content increased with increasing levels of PBSW and decreased with increasing levels of WPVS in both the soil layers. The cation exchange capacity (CEC) increased with increasing levels of PBSW and WPVS in both the soil layers. The exchangeable sodium percentage (ESP) decreased with increasing levels of PBSW and WPVS over the initial values of soil in both the layers. The pH of saturated paste (pHs) was reduced and electrical conductivity of extract (ECe) was increased with increasing levels of PBSW and WPVS in both the layers. The Na⁺ content of saturation paste extract increased significantly with increasing levels of PBSW and WPVS in both the soil layers.  相似文献