人工神经网络技术在变速箱故障诊断中的应用

阐述了人工神经网络技术在变速箱故障诊断中的一般方法，重点介绍了人工神经网络模型训练参参数数的选择和机械故障信息的提取方法，实验结果表明，人工神经网络技术可以快速、准确地诊断出机械故障类型。     

人工智能在机械故障诊断中的应用

介绍了机械故障中应用的各种人工智能诊断方法及理论，包括专家系统、人工神经网络等，根据二者在机械故障诊断中的应用情况分析了它们的优缺点，并以专家系统在汽车故障诊断中的应用为例，阐述了专家系统在实际应用中存在的问题。     

Growth and nutrition of containerized Pinus Resinosa seedlings at varying moisture regimes

Containerized red pine (Pinus resinosa Ait.) seedlings were grown over a 16-week rotation at different irrigation treatments to assess moisture stress on plant growth and nutrition, and to evaluate container capacity as a guide for irrigation. Wet, moist and dry moisture regimes were induced by watering trees to the container capacity weight of the growing medium after declining to respective 92, 73 and 57% of this reference weight. The seedlings received the same amount of fertilizer over the growth period. Maximum shoot and root growth was attained under the wet moisture regime, but biomass was reduced 21 and 43% for the moist and dry regimes. Plant nutrient concentrations were not significantly affected by watering treatment, and vector diagnosis of dry matter production and element composition indicated that macronutrients were non-limiting. Seedling nutrient uptake however, was significantly diminished by moisture stress which was attributed to decreased root growth and lower mass flow and diffusion of nutrients when moisture availability was reduced in the peat rooting media. Container capacity was found to be a sensitive reference for judging the watering requirements of greenhouse-grown containerized seedlings. The method can be relatively easily applied on an operational basis.     

THE FAULT DIAGNOSIS TECHNOLOGY BASED ON FRACTAL GEOMETRY FOR LOGGING TRUCK ENGINE

INTRODUCTIONAccordingtOstatlshcs,w1enanewtrtlckhastraveledoverlOo,OOOkn1,tl1egear-sluftlllechanisl11ingearboxisoftel1outoforder,andaftertWohundredandtwenty-fivekilo11le-ters,thehalfofthepartsinthetrans111issionsyst6mareall11ostchanged.Tl1etrUckofte11travelsontheabnon11alcondihon.ForlogProduchon'tllelognl1gtrtlckge11erallytravelsinmaintainousareaandtl1etfansPOrtanontasksaremalnlydoneinwinter.IfaloapngtrUckisoutoforderinmohon,thetransPOrta-honisdifficultytobecol11pleteda11dtl1edriver'S…     

野生动物疾病计算机辅助诊断系统

野生动物疾病计算机辅助诊断系统是一套计算机软件,帮助兽医对野生动物的疾病进行临床诊断治疗。系统主要有两个功能模块。一是辅助兽医对遇到的野生动物疾病进行全面、快速和准确地临床诊断治疗,系统可以从常见的15个症状入手,提供约150种野生动物疾病内容供使用者参考,既包括许多常见病的详细内容,也包含罕见病的介绍。二是对系统本身进行完善和充实,系统具有良好的自我维护功能,随时可以把最新的疾病诊疗内容加入到系统中,也可以方便地对现有的内容根据需要进行修改。     

巨桉短周期工业原料林养分平衡的矢量诊断

以四川纳溪区巨桉试验林为研究对象,运用植物营养矢量诊断法,分析植物养分受限制状况、交互作用、施肥效应,结果表明:四川纳溪巨桉试验区以K为第1养分限制因子,P为第2限制因子,N不受限,B素缺乏,P对Ca、Mg存在拮抗作用,对B有促进作用.施肥效应可延续3年以上.     

重组竹发展前景展望

重组竹是90年代开始研究的新产品。它竹材利用率高；物理力学性能优良；加工性能好；外表美观；工艺简单；且成本低廉，是很有发展潜力的新产品。可用作工程结构材料、装饰材料、家具用材、地板等，经过模压可作各种特殊用途。本文介绍了重组竹研究的起源，阐述了重组竹的研究现状，并且从资源、技术、经济效益三方面分析了重组竹在我国发展的可行性，预测了重组竹的发展前景。     

Erosion Optimized Diagnosis of Brand Grounding Grid

To find the corrosion of the grid ,large area cutting has been adopting in practice for a very long time. But this method is blind, difficult and influences the system operating. The erosion diagnosis method in the past is effective for the smaller grid. To the brand ones, it can not take effect. The method of separating the grounding grid into several parts and diagnosing step by step is discussed by lots of simulation about middle or brand grounding grid erosion diagnosis. This method makes the brand grounding grid erosion diagnosis quick and truly without power cut and digging large area, satisfies the demand in practice. Putting this optimized diagnosis method into practice , the result is good.     

Analysis of the Modulation Phenomenon of Complex Vibration in Gearbox Fault Diagnosis

This paper presents a modulation phenomenon of complex vibration which occured when gear teeth broke or shaft seriously bent in gearbox. Based on the mechanism of gear vibration and modulation sideband,the peper analyzes this complex modulation phenomenon.