役生現象 的英文怎麼說

中文拼音 [shēngxiànxiàng]
役生現象 英文
helotism
  • : Ⅰ名詞1 (需要出勞力的事) labour; service 2 (兵役) military service 3 (舊時指供使喚的人) serv...
  • : Ⅰ動詞1 (生育; 生殖) give birth to; bear 2 (出生) be born 3 (生長) grow 4 (生存; 活) live;...
  • : Ⅰ名詞1 (現在; 此刻) present; now; current; existing 2 (現款) cash; ready money Ⅱ副詞(臨時; ...
  • 現象 : appearance (of things); phenomenon
  1. 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,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。
  2. A type of symbiosis, as among certain ants, in which one species is dominant and makes the members of another species perform the tasks required for their mutual survival

    ) ,役生現象一種共) ,如某些螞蟻,在這種中,一個種處于支配地位,並使得別的種的成員承擔他們共同存所需完成的任務
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