mid fiber 中文意思是什麼
mid fiber
解釋
中長纖維-
Twenty f1 combinations crossed among 5 varieties and strains different in fiber properties according to complete diallel crossing design were used to evaluate the heterosis and gene action of boll weight and lint percentage in high quality fiber property varieties in upland cotton in 1998 1999 for two year successively at nanjing. it was indicated that there existed small interactions with the environmental factors without maternal effects and the additive gene effect was in chief, attaining to 51. 2 % and 65. 4 % respectively for boll weight and lint percentage. the dominant effect was also in higher rate, 32. 6 % and 16. 8 % respectively. the population mean heterosis of boll weight and lint percentage over the mid - parental mean were relatively prominent 13. 3 % and 3. 5 % respectively in extreme significance. however, boll weight showed no significantly surpassing parental f1 heterosis over the better parent based on population mean ( 2. 0 % ) ; while the lint percentage expressed significant negative heterosis value ( - 2. 1 % ). the gene actions were in conformity with the heterosis expression. it was shown clearly that the f1 combinations crossed between parents with similar performances had relatively high dominant effects and significant positive f1 surpassing parental heterosis ( f1 heterosis over the better parent ) ; while no f1 combination crossed between the parents with prominent mutual difference surpassed the higher parent in yield components, which indicated that among those parents with less difference and close relationships, there still existed sufficient genetic variation or certain mechanism for creating variation and achieving greater advances in breeding. correlation analyses also indicated that there still existed severely undesirable negative correlation between yield and fiber properties as well as the difficulties for their simultaneous improvements
利用5個具有不同纖維品質性狀的品種（系）配製完全雙列雜交組合20個，通過親本和f1的2年隨機區組試驗發現產量性狀的鈴重和衣分與環境的互作效應小，不存在母體效應，並以加性遺傳效應為主，分別占表型方差的51 . 2 %和65 . 4 % ;顯性遺傳效應所佔的比率也較高，分別為32 . 6 %和16 . 8 % .鈴重和衣分的群體平均優勢較大，分別為13 . 3 %和3 . 5 % ，達到了極顯著;鈴重的超親優勢為2 . 0 % ，不顯著;衣分為顯著的負值（ - 2 . 1 % ） .遺傳分析與雜種優勢結果一致.具體表現在產量性狀上，親本相當配製的組合雜合顯性較高，其超親優勢正向顯著，而極值親本（差異較大）所配組合沒有超過高親的.這表明親本差異小、親源關系較近的親本中仍然存在足夠的遺傳變異或某種機制以創造變異使育種取得更大的進展.相關分析表明了仍然存在嚴重的品質與產量的負相關，遺傳改良的難度較大 -
Generally speaking, there are two types of optical fibers for mid - infrared laser transmission. one is solid - core optical fiber and the other is hollow waveguide
目前研究傳輸紅外激光光纖一般分為兩類：紅外實芯光纖和紅外空芯波導。 -
However, owing to adoption of nether long - pin, gauge between front and middle rollers is longer and controlling force of the mid of apron is weaker. therefore, as for the fiber which is short in fiber and worse in regularity, this kind of drafting is not so ideal not only from the point of theory but also from practice
但這種形式的牽伸，由於採用下長銷，前、中羅拉隔距偏大，皮圈中部的控制力較弱，對于纖維短、整齊度差的纖維，無論從理論上和實踐上都不夠理想。 -
Third, c80 high - strength concrete is used in the test beams. finally, to increase the ductility of the test beams after the crack of mid - support, steel fiber reinforced concrete is used in the mid - support zone. as part of the whole research project, several works have been undertaken in this dissert8tion
本課題主要突出以下特點： （ 1 ）結構模型為兩跨變截面箱型連續梁； （ 2 ）部分預應力體系作為研究重點； （ 3 ）梁體採用c80高強混凝土； （ 4 ）為了增加結構在中支座開裂后的延性，在連續梁的中支座區段採用與梁體其它部分同標號的鋼纖維混凝土。 -
Due to the restricted funds and actual conditions to test and evaluate carbon fiber reinforced plastics ( crfp ) mid - small sized bridges, so the test and evaluation shall not be conducted by a method fully based on the load borne by old bridges
摘要檢測評價碳纖維加固中小型舊橋的加固效果往往受到經費和現場情況的限制，不能完全按照舊橋承載力檢測方法進行。
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