directional selection 中文意思是什麼
directional selection
解釋
定向選擇定向選擇- directional : adj. 1. 方向的。2. 【無線電】指向的，定向的。
- selection : n. 1. 選擇；挑選；選拔。2. 拔萃；選擇物；精選物[品]；文選。3. 【無線電】分離，（自動電話）撥號。4. 【生物學】選擇，淘汰。
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Directional solidification and microstructure selection for ti - al peritectic alloy
包晶合金定向凝固及組織選擇 -
Preparation of niobium - based ultrahigh - temperature alloy and selection of crucibles for directional solidification
基超高溫合金制備及定向凝固用坩堝的選擇 -
Firstly, we analyze the transient and steady character of single phase high - impedance grounding fault. secondly, based on wavelet analysis on checking mutational signal and direction high frequency protection theory, utilizing zero sequence current and module current, this paper provides a new scheme including fault starting element, fault phase selection element, directional element and main criterion. this scheme can bear high impedance and is immune to system surge and frequency warp, which gets over the shortcoming of the lack of sensitivity
由於現有的保護方案無法快速有效地切除此類故障，本文在詳細分析了單相高阻接地故障的穩態和暫態特性的基礎上，從小波分析原理出發，利用小波變換檢測突變信號的原理，以零序電流、模電流等為研究對象，結合方向高頻保護的原理，設計了一套包含啟動元件、選相元件、方向元件、主保護的保護新方案。 -
Associated with a practical example of pipeline crossing with directional drilling technique in yizheng - changling crude oil pipeline, this paper analyzes the characteristics of crossing through rocky stratum with directional drilling, deliberates the stratum status, drilling machine selection, drilling tool assembly, direction control, mud control ; drilling process as well as emergency dealing scenarios at the stages of guiding - hole drilling, aperture expanding and back - towing
摘要結合儀征長嶺原油管道洪湖長江定向鉆穿越工程實例，分析了管道定向鉆穿越長距離巖石層的特點，論述了定向鉆穿越巖石層的地層狀況、鉆具組合、控向措施、泥漿控制、鉆進工藝以及導向孔鉆進、擴孔、回拖階段的應急預案，針對在鉆導向孔過程中因泥漿壓力高、信號線多次出現被高壓泥漿沖壞、造成控向信號不穩定甚至中斷的情況，對信號線的安裝提出了改進措施。 -
It also introduces the breeding strategies such as importing and creating new genotypes of dry - farming, choosing local varieties as parents, adopting convergent cross, using directional selection in adverse circumstances, selecting under dry and humid environments alternatively, practising shuttle breeding, diversifying the breeding of rust - resistant varieties, and strengthening the breeding of high quality varieties for special purposes
提出了旱作種質引進創新，選擇當地品種作親本，採用聚和雜交，利用逆境定向選擇，多生態水、旱交替選育，實行穿梭育種，多元化抗銹育種，加強優質專用品種選育的育種策略。 -
E - nni is a bi - directional signaling interface between the control entities of different autonomous domains, used to set up cross - domain connections. the functions it supports include call control, resources discovery, connection control, connection selection and route hunting
E - nni用於實現跨域連接的建立，其支持的功能包括呼叫控制、資源發現、連接控制、連接選擇和連接路由尋徑。 -
According to the change of society ' s requirement for talents, in the specialty practice training, it set up different skill and ability direction to different post group to carry out more directional and sharp training, this broke the single teaching contents to make students have more selection and more energy to study some skill deeply
摘要根據社會對人才需求的變化，在專業實訓中設置不同技能方向針對不同的崗位群進行更具針對性的訓練，打破了單一的教學內容，使學生有更多的選擇餘地，有更多的精力深入的學習某一技能，實現差異化發展，提高了學生就業的競爭力。 -
Our school has provided the graduates with employment information, and recommended the best fit for the job, based on the principle of dual - directional selection
學校為畢業生提供就業信息，本著雙向選擇的原則，擇優推薦工作。 -
Morphological selection of al - zn alloy during directional solidification
合金定向凝固過程中的組織形態選擇
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