壽魚科 的英文怎麼說
中文拼音 [shòuyúkē]
壽魚科
英文
banjofishes-
Most ponds practise polyculture of carps mixed with tilapia or grey mullet. the remaining ponds carry out monoculture of snakehead or catfish. however, many coastal ponds are converted to monoculture of brackish species such as scat, seabream and pampano to reap better profit
大部分魚塘採用混合養殖法，養殖的魚類品種多數以鯉魚科混合福壽魚或烏頭，其餘魚塘則採用單養式養殖法，飼養生魚或塘虱。In order to solve two difficulties in the present conceptual design of torpedo, this paper introduces many new ideas into the original theories, and gives a new synthetic conceptual design theory for torpedo. one of the difficulties is that we have no a index which can represent various performances of torpedo, the other is that the coupling relationships among various subsystems and disciplines are ignored in the design process. the new ideas involve the study about operational effectiveness, life circle cost, risk and research schedule, which can be used together to evaluate a design project
本文針對魚雷總體設計中目前存在的兩個突出技術難題： （ 1 ）缺乏能夠全面反映魚雷總體設計性能的指標（ 2 ）對魚雷總體設計中各部分組成、各學科間的耦合關系，沒有合適的分析和求解方法在原魚雷總體設計理論和方法的基礎上，引進了作戰效能、壽命周期費用、風險和研製周期的概念，來全面反映魚雷設計的性能、經濟性、風險性和時間性等指標；在優化設計中，採用多學科設計優化方法作為優化演算法，構建了一種新的魚雷總體綜合設計方法。( 3 ) in the new theory of synthetic conceptual design of torpedo, this paper takes operational effectiveness as the object function in the optimization model. models and analysis methods are given for the synthetic conceptual design of torpedo based on the operational effectiveness. in order to involve economic index in the study, this paper introduces life circle cost into the synthetic conceptual design, and gives a model of design based on the ratio of cost and effectiveness
（ 3 ）在魚雷武器系統作戰效能和魚雷總體設計中各學科設計的研究基礎上，將作戰效能作為優化的目標引入到魚雷總體設計的模型中來，給出了基於作戰效能的魚雷總體綜合設計模型與方法；為全面反映魚雷設計的經濟性、風險性和時間性，又引進了壽命周期費用、風險和研製周期的概念，各自都作了相應的研究，給出了基於效費比的魚雷總體綜合設計方法，和基於四維指標的魚雷總體綜合設計方法。
分享友人