混合多倍體 的英文怎麼說
中文拼音 [húngěduōbèitǐ]
混合多倍體
英文
poikiloploid-
In this thesis, first, reasons and factors for the stability of loose rock dams were summarized according to the field surveys and certain expert ' s experiences. then, researches on block stability problems were reviewed, and according to the relationship between grain size and incipient velocity, it is found that the block weight is in direct proportion to 6 - 9 power of incipient velocity, and 50 % increase of the velocity will result in about 40 times change of the block weight. after that, experiments were conducted in a flume, focusing on the relationship between incipient velocity and some main factors including block weight, water depth over the dam, cross - section size, block material and river bed material
本文首先根據散拋石壩損毀情況的現場調查資料，結合有關專家多年的整治經驗，總結出壩體的損毀原因及影響因素；對現有塊體穩定性的研究成果進行回顧和總結，並針對散拋石壩的直接損毀現象，結合山區河流的水流、地形特點，利用塊體粒徑與起動流速的關系，提出塊體穩定重量與起動流速高次方成正比的概念，流速50的增長可能導致塊體穩定重量接近40倍的變化；通過二維變坡水槽試驗，研究了壩體穩定的主要影響因素，包括塊體重量、壩頂水深、斷面尺寸、塊體材料（塊石和卵石兩種） 、護底等，結果表明對于山區河流，試圖僅僅通過增加壩體單個塊體重量或斷面尺寸來提高壩體穩定性效果甚微；最後，根據西部地區的自然、經濟、交通等條件，提出可以採用柔性混凝土鉸鏈體等一類整體性較好的護面層作為散拋石壩的防沖毀措施，以期取得良好的工程效果。The results showed that the notched impact strength of pvc / acr blends was improved remarkably and the tensile strength and the flexural strength of the blends have not obviously changed. the notched impact strength of pvc / acr blends was increased to about 3 times more than the pure pvc when the ratio of pvc / acr is 100 / 6 ( wt )
結果表明，所合成的acr和pvc共混后能提高pvc的抗沖擊性能，並呈現明顯的韌性斷裂特徵，而材料的拉伸性能和彎曲性能下降不大，當pvc acr = 100 6時，共混體系的缺口沖擊強度較純pvc提高3倍多。The improve of rev also lessen ttq, lessening the energy consumption, while in the same time, increase the energy consumption of the machine, so we should choose proper rev to lessen the energy consumption. 2. with the content of talc, the tensile strength of the composite improves first and then decreases, with a most value in the 20 % of the talc
2隨著滑石粉含量的增加，該復合材料的拉伸強度先升后降，在滑石粉含量為20時達到最大，經混合偶聯劑處理的復合體系，拉伸強度比未處理的提高約2倍，沖擊強度比未處理的高約2倍多，但考慮到製品性能和成本，滑石粉填充量在30 - 40比較合理。Second, on the base of large scale integer building model tests, anti - seismic property of structure of multi - rib panel is analyzed, and is contrasted with the property of the masonry structure. the research reveals that buildings in structure of multi - rib panel make shear deformation mainly, whose failure process is similar to the single composite panel and the tests result shows that, contracted to masonry structure, carrying capacity of buildings in this structure is 1. 5 times and deformation capacity is about 3 times. in addition, thanks to the lower self - weight, the seismic response of the buildings is far lower than masonry structure
研究表明：多層密肋壁板結構房屋以剪切變形為主，破壞過程與單塊墻板相似；復合墻板與后澆隱型框架連接成整體結構，協同工作；傳統的底部剪力法適用於本結構體系的抗震計算；試驗結果還表明，該結構房屋最大承載能力是磚混結構的1 . 5倍，變形能力是磚混結構的3倍左右，而房屋自重比砌體結構減少1 4以上，地震反應遠低於砌體結構。分享友人