最小約速定理 的英文怎麼說

中文拼音 [zuìxiǎoyāosùdìnglǐ]
最小約速定理 英文
principle of least constraint
  • 最 : 副詞（表示某種屬性超過所有同類的人或事物） most; best; worst; first; very; least; above all; -est
  • 小 : Ⅰ形容詞1 （體積、面積、數量、強度等不大） small; little; petty; minor 2 （年紀小的; 年幼的） youn...
  • 約 : 約動詞[口語] （用秤稱） weigh
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 理 : Ⅰ名詞1 （物質組織的條紋） texture; grain （in wood skin etc ） 2 （道理;事理） reason; logic; tru...
  1. With the using of microsoft visual basic 6. 0, a multimedia computer - aided design system of small type pumping irrigation district is developed in this paper. provided with the live multimedia messages as well as a good man - machine conversation mechanism, this system can help the user to finish the planning of an pumping irrigated area such as the layout of canal system, the selection of pump models, the establishment of the irrigation program, the calculating of canals " parameters, the estimate of the project magnitude, the selection of the field constructions, the economic analysis of the project, the output of results, etc, a new oo ( object oriented ) programming method is adopted in this system, various softwares are integrated in this systems as well by the " automation " technic provided by vb, in addition, the multimedia technic is applied to this system for the first time, it makes the system easy to ope rate. as for the optimization of the canals " section, a new optimization method is adopted based on the existing theories about the canals " section, and in this way, with the purpose of minimizing the project ' s investment as well as a stalized canal, limited by the longituding slope, the canals " best feasible parameters can be deduced. furthermore, a integral method to reckon the earth work is developed in this paper, by this way, the estimate precision of the earthwork is enhanced notably. this paper includes the particular illumination for the developing procedure of each systems " segment, and in the end, the directions of the system are demonstrated in a sample area which lies in the zhaija village, taizhou city, jiangsu province, the running results showed that the initial purposes are achieved effectively, and it has a preferable practicability

    在渠道縱橫斷面優化方面，本文在利用已經比較成熟的縱橫斷面優化理論的基礎上，提出以工程總費用最小為目標函數，以渠道縱坡i為控制變量，以渠道不沖不淤流速及灌區允許地面比降為約束條件，通過縱橫斷面聯動優化的方法得到渠道的最佳工程可行的斷面參數。另外，針對部分地區的取土困難的狀況，本文採用積分法計算渠道工程土方量，從而大大提高了土方量的估算精度，有助於準確控制工程投資規模及資金投向。本文詳細闡述了該系統所採用的編程方法、系統構成、系統各組成模塊的開發過程以及灌區規劃所採用的優化方法及原理，最後應用本系統對泰州市翟家村機電灌區進行規劃設計，運行結果證明其操作比較簡便，界面友好，運行速度快，規劃成果合理，基本達到了系統預定的要求，具備較強的實用性。
  2. In the research, the authors conducted the case study in donghai county on factors affecting farmer ' s adoption to the environmental - sound vegetable production technologies and their learning behavior in making the decision on technology adoption the process. the study applied participatory rural appraisal ( pra ) and kap ( knowledge - attitude and practice ) and made following findings and conclusions : farmer households have " relative rationality " under the different decision - making conditions affected by different factors, the target of their production is pursue the maximum profit with minimized risks ; agricultural extension organizations are able to transfer relevant environment - sound production techniques to farmer ' s households. most of vegetable growers have the knowledge and skill to properly use pesticides and chemicals

    本文以東海縣農民對無公害蔬菜生產技術的學習過程為例，採用pra調查方法，系統分析影響農戶采納無公害蔬菜生產技術的因素，同時運用kap調查方法，對農戶的無公害蔬菜生產技術的知識、態度、行為的差異進行快速評估，本文的研究結論如下： 1 、農戶以追求利潤最大化為其生產的目標，但由於受多方面因素的制約，影響了農戶的技術採用決策，導致了農戶只能是「有限理性的小農」 ，其生產目標是在特定因素影響下以風險較小化為前提的相對利潤最大化。
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