犁工機 的英文怎麼說
中文拼音 [lígōngjī]
犁工機
英文
ripper rooter-
The random forces on the mole plough were studied by the spectral analysis method
採用頻譜分析方法研究了鼠道犁土壤工作部件的隨機受力。Based on the analysis of the real work state of the tractor in the field, take the typical plough implement unit as an example ; a further study was made in this paper, including the theory of the automatic transmission and the quality of gearshift
本文以典型的犁耕機組為例，在分析拖拉機田間作業工況的基礎上，深入研究了拖拉機自動變速系統理論及換檔品質的問題，改進了換檔執行機構，用模糊控制方法對換檔品質進行了優化。In this paper i calculate the reasonable possession quantity of port handling machineries with chance - constrained linear programming. first in the paper is the background and meaning of this research ; then analysis present situation of port machinery management both in practice and theory ; in chapter 3, i qualitatively discusses characters influencing machinery quantity, which include lifting ton, intact rate and using rate, age of machinery, machinery purchase and working cost and so on. in chapter 4, i take the influencing characters to mathematic model of chance - constrained linear programming, aiming to maintain the need of production and reduce machinery cost
文章首先介紹了選題的背景、意義以及主要工作；第2章介紹了港口機械管理在港口企業管理中的地位與作用，以及我國港口機械設備管理與配置現狀，並簡要介紹目前港機合理擁有量的理論研究方法；第3章從技術與經濟角度定性分析了各種因素對港機擁有量的影響，其中主要包括機械起運量、完好率與利用率、機械設備役齡、購置與營運成本等；第4章將各種影響因素引入模犁，提出以完成生產任務、機械成本最低為目標，應用隨機線性規劃模型計算港口流動機械合理擁有量的方法；第5章以大連港大港區為例對模型進行應用，選擇四種型號叉車為研究對象，對其歷史經濟與技術數據進行統計分析，其中重點對隨機變量單位臺時維修費用進行了正態分佈擬合。
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