selection pressure 中文意思是什麼
selection pressure
解釋
選擇壓力-
Some examples of heavy herbivore pressure may help appreciation of the possible brevity of the selection process.
植食動物強大壓力的一些事例可以幫助我們對選擇過程的簡略性有所了解。 -
Abstract : the paper introduced the theory of piping transportation of the 1 500 deadweight ton bulk cement barge, and provided the numeration and selection method of main parameters, such as pipe diameter, wind pressure, flux, etc
文摘:介紹了1500t散裝水泥運輸船的水泥管道輸送原理，給出了該船上壓縮空氣管、流化空氣管和水泥裝卸管的管徑、風壓、流量參數的計算和選用方法。 -
A new system of rapid roll carriage infeed and return, together with automatic selection of pressure and feed rate, has improved the already impressive floor - to - floor times achieved
快速輥子進給和返回系統和自動壓力、進給速率調節器提高了工作效率。 -
In corn ' s wild relative, teosinte, these alleles occur in only 7 to 36 percent of plants, indicating that the selection pressure applied by early farmers to favor those alleles was rapid and thorough
而在玉米的野生親戚大芻草里，這些對偶基因的出現率只有7 ~ 36 % ，顯示出早期農民對偏好的對偶基因，施予的選擇壓力很徹底而且快速。 -
Code of practice for the selection and application of bellows expansion joints for use in pressure systems - metallic bellows expansion joints
壓力系統用波紋管膨脹節選用慣例.第1部分:金屬波紋管膨脹節 -
The second problem is that after material choice, how can we put the material in proper position to avoid mouthpiece vertically. the third problem is that for every belt of the equipment " s material, what angle can we put the joint weld, because the improperly arrangement of joint weld will reduce the equipment ' s pressure _ bearing ability. the thesis has researched the optimizing condition of material selection and weld joint position arrangement in chemical equipment making technology. the author also discuss the optimized model and develop a stock layout software by using microsoft corporation ' s tools visual basic 6. 0
本文針對以上問題，根據化工設備生產實踐討論了化工設備製造過程中對材料用料選擇的優化及排料時焊縫位置（環縫、縱縫）的優化，建立了用料選擇優化計算模型及焊縫位置的優化計算模型，並利用microsoft公司的程序開發工具visualbasic6 . 0開發了化工設備智能排樣系統，該系統可以根據用戶材料及用戶在設備製造過程中各種要求進行優化計算並輸出優質的設備製造排樣圖。 -
Once consigned to the genomic junk pile, however, pseudogenes are released from this selection pressure and are free to accumulate all kinds of mutations, including changes that would be deleterious to normal genes
然而一旦劃分到基因組垃圾堆后，偽基因就不再受天擇的壓力，各式各樣的突變都會累積下來，包括那些會損害正常基因的改變。 -
Using method of oil - flow visualization techniques and measuring pressure distribution along airfoil chordwise and spanwise studies have been down for sidewall boundary - layer displacement effect in two - dimensional wind tunnel. three different chord models were tested in two different wind tunnel. in order to clarify the sidewall effects and study method of sidewall suction theory and sidewall interference correction method to remove effects of sidewall on model. the results of oil - flow test show that selection rational suction wary can obtain better testing results. by investigations on effects of the sidewall boundary layer suction and application of a sidewall interference correction method
為了很好地解決多機場航班隊列的擁塞問題，在將進場容量、離場容量與機場容量作為統一整體的情況下，充分考慮了機場間的網路效應，詳細研究了多機場航班隊列的優化問題，建立了多機場開放式非實時流量管理的數學模型，通過選取適當的決策變量，使其為線性0 - 1整數規劃模型，實現了中心流量集中管理.與其它演算法不同，本文提出的啟發式隱枚舉演算法能很好地解決此類問題，對某機場網路系統的模擬結果證明了所建模型、優化演算法及相應軟體的有效性和可靠性 -
The sensitivity algorithm is a knowledge of research on the affection of parameters varies to system performance. combination with pressing force and infuse time predicted model, by using sensitivity algorithm, the affection of cast temperature, mould temperature and infuse pressure on infuse time is researched deeply, and the affection of cast temperature, infuse time and infuse pressure on the pressing force in the origination stage of extrusion process. the sensitivity analysis has huge instructing significance to the selection of parameters
靈敏度演算法是分析參數變化對系統性能影響的一種有效工具，所以本文引入靈敏度演算法，結合壓制力和浸滲時間預測模型，深入研究了澆注溫度、模具溫度和浸滲壓力對浸滲時間的影響關系，以及澆注溫度、模具溫度、浸滲時間和浸滲壓力對擠壓過程起始階段壓制力的影響，對于參數的選取，具有一定的指導意義。 -
This selection of gauges will provide contractors with instruments that span the pressure testing and monitoring needs required by plumbing, heating, ventilation, and air conditioning applications in the home and in commercial and institutional buildings
這些儀表為建築承包商提供包括壓力測試和監控的儀表，滿足住宅、商用建築和工業建築的管線安裝、加熱、通風和空調的應用要求。 -
The second chapter simply introduces the development of alternate asynchronous inverter technology and retrospects some types of energy - saving systems for hydraulic elevators. then the working principles of the project are discussed and analyzed at four different working status, i. e. light load upwards, heavy load upwards, light load downwards and heavy load downwards. and the chapter focus on the introduction of structure design of pump station, calculation and type selection of pump / motor reversible units, research on oil leakage principles of accumulator circuit, design of accumulator - pump / motor pressure - energy transformer and integrated valve blocks, etc. the last but not the least, the electrical wiring of vector inverter control cabin and design of computer control and data acquisition system are introduced
論文第二章首先簡單介紹了交流異步電動機變頻調速技術的發展概況，在回顧電梯液壓控制系統節能技術的基礎上，介紹了本課題研製的「採用蓄能器的液壓電梯變頻節能控制系統研究」的基本原理，分析了動力系統在電梯轎廂輕載上下行、重載上下行等四種典型工況下的基本工作狀態和工作方式；詳細地介紹了本課題節能系統液壓動力泵站的結構設計和參數設計，重點研究了液壓動力泵站的結構設計、液壓泵馬達可逆性問題及其選型設計計算、蓄能器迴路泄漏油損失機理的研究及其補償裝置的設計、蓄能器-泵馬達壓力能量轉換裝置的設計、多功能集成控制閥組的設計等內容；最後簡單介紹了本課題矢量控制變頻控制櫃的外部附件電氣接線、計算機控制及數據採集系統的硬體設計等內容。 -
On the medium containing 3 mg / l of ppt as selective agent, about 65 % of t1 seeds germinated, while only 5 % for wild - type seeds. on selection pressure - free medium, about 73 % of tl seedlings were gus - positive and none for the control seedlings. this is coincided with the mendel ' s law of 3 : 1 segregation
T _ 1代的種子在含ppt3 . 0mg l的萌發培養基上萌發率為65 ，在沒有篩選壓的培養基上生長的苗子的gus陽性率為72 . 82 ，符合孟德爾的3 ： 1的分離定律（去除本身不萌發的因素） 。 -
The design manual falls into three parts : chapter 1, as the overal design part, mainly descirbes how to determine which mechanisms with what metal structures shall be used and illustrates how to design its boom structure and balancing system, including point search, calculation and check ; chapter 2 introduces how to design the crane ' s running gear, including model selection, wheel pressure calculation and overall stability check ; and chapter 3 deals with model selection of its lifting mechanism and related calculations
說明書詳細的介紹了該型號起重機的總體設計及行走機構設計和計算過程，總共分為三章：第一章為起重機總體設計部分，主要內容是起重機各機構和金屬結構型式的確定，並用作圖法對臂架結構和平衡系統進行設計，包括了機構找點，驗算及校核；第二部分是運行機構的設計計算，包括了運行機構的選型，輪壓計算，整機穩定性校核；第三部分為起升機構的傳動方案選型和設計計算。 -
Roadway lighting equipment - high - pressure sodium lamps - guide for selection
道路照明設備.高壓鈉燈.選擇指南 -
During breeding for vertical resistance, horizontal resistance tends to decline because of negative selection pressure.
當培育垂直抗性時，由於負的選擇壓力，水平抗性趨于下降。 -
In igaa a simulated annealing algorithm is used to alleviate the selection pressure of the genetic algorithm, and enhance the global convergence of igaa
在改進的遺傳演算法中利用模擬退火的方法可以緩解遺傳演算法的選擇壓力，增強了遺傳演算法的全局收斂性，避免了在搜索過程中陷入局部最優。 -
The two areas are important in locust control in china because of the frequent massive outbreaks of locusta migratoria manilensis ( meyen ). the selection pressure of op was found higher in huanghua - hebei and beidagang - tianjin than in pingshan - hebei and wudi - shandong. ld50 values for malathion of huanghua - hebei and beidagang - tianjin are higher than those of pingshan - hebei and wudi - shandong
天津北大港、河北黃驊及河北平山三種群對馬拉硫磷的ld _ （ 50 ）值分別是山東無棣種群的1 . 96 、 1 . 8及1 . 02倍，這說明，我國重點蝗區殺蟲劑的選擇壓力已經造成當地東亞飛蝗種群對常用殺蟲劑的敏感性下降。 -
Evolutionary selection pressure has probably entrenched the behavior in social animals such as ourselves
其原因大概是由於進化中的適者生存的壓力固化了像我們這樣的社會性動物的行為。 -
The author discussed the determination of selection pressure, measured the growth of calli and analyzed the influences of regeneration media on the regeneration of resistant calli in order to get some parameters to enhance the indica rice transformation frequency of particle bombardment
從秈稻基因槍轉化過程中選擇壓的確定、愈傷組織的生長規律以及不同分化培養基對抗性愈傷出苗率的影響上，探討了可能提高秈稻基因槍轉化頻率的參數。 -
The frequency of invasive fungal infections has risen dramatically in recent years, increasing antifungal selection pressure and the emergence of antifungal resistance
摘要近年來，真菌感染，尤其是酵母樣真菌感染的發病率和嚴重程度呈逐年上升趨勢，且隨著耐藥菌株的不斷出現，可選擇的抗菌藥物受到限制。
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