aggregate dimension 中文意思是什麼
aggregate dimension
解釋
總尺寸-
By making some assumptions, collision frequency were presented. then the the flocculation kinetics model was established through population balance equation. comparison of experimental data and modeling results indicate that there are the same trend between the two. so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters. the tem and sem were used to obsever floes in the study of floe structure. the flocculation was divided as flocculi, floc and floe aggregate. the floes structure model was established by assumption that particles position in floe accords with tetrahedron. the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent
最後，本文還對絮凝動力學和絮體結構進行了研究，在前人研究的基礎上，針對高分子絮凝黃河泥沙，對絮凝過程作了一些符合試驗條件的假設，建立了顆粒碰撞頻率表達式，應用了顆粒數量平衡方程，從而建立了絮凝過程的動力學生長模型，模型計算結果與試驗數據對比表明，二者趨勢一致，在沒有使用經驗參數的情況下基本上能夠描述黃河泥沙絮凝過程中絮體數量和尺寸分佈的變化過程；對絮體結構的研究中，應用掃描電子顯微鏡和透射電子顯微鏡對絮體進行了觀察，將絮體分為絮粒、絮團和絮網三個不同的生長階段，通過假設顆粒結合位置符西安建築科技大學博士學位論文合正四面體，建立了絮體結構模型，計算得到的模型絮體分形維數基本與試驗中的實際絮體相符，在一定程度上能夠反映高分子絮凝黃河泥沙生成的絮體結構。 -
The percolation threshold value ( pp ) is not related to the size of model lattice but to near neighbor conditions. however, the fractal dimension of aggregate ( d ) is definite and independent of neighbor conditions, as p is equal to pp
3 、逾滲閾值pp只與近鄰條件緊密相關，而與模型的網格大小無關；當生長概率p等於對應的逾滲閾值時，凝聚體的分形維數d為一確定值，且與近鄰條件無關。 -
Aggregate, pivot, unpivot, and slowly changing dimension transformations, for common data warehousing tasks
聚合、透視、逆透視和漸變維度轉換，用於常見數據倉庫任務。 -
( 3 ) investigate the method of optimizing meshes by which two dimension finite element grids of meso - scale can be improved. ( 4 ) the three dimension parallel numerical computation of the wet - sieved concrete specimen was executed successfully to verify the program of random convex polyhedron aggregate
（ 3 ）研究了二維細觀骨料模型有限元網格的優化方法並編制了相應有限元網格剖分程序，為三維細觀骨料模型有限元網格優化打下了基礎。 -
Hierprefixcube retains advantages on computation and organization of prefixcube, and it can directly support aggregate queries on levels of the dimension hierarchy
它不僅保留了前綴立方在計算和組織結構上的優點，又能直接和充分支持維層次級的聚集查詢。 -
The results show that the compressive strength, splitting tensile strength and flexural strength increase respectively with the addition of steel fibers, but the compressive strength increases little compared with the splitting tensile strength and flexural strength ; for the same kind of steel fiber reinforced concrete, the compressive strength, splitting tensile strength and flexural strength of steel fiber reinforced regenerated concrete are higher than those of steel fiber reinforced pebble concrete ; the load - bearing capacity of blended steel fiber reinforced concrete is less than that of single dimension steel fiber reinforced concrete ; the use of steel fiber reinforced regenerated concrete whose aggregate is made of regenerated concrete can not only turn waste into treasure, but also reduce environmental pollution and realize the recycle of resources, and its load - bearing capacity is far higher than that of steel
結果顯示:由於鋼纖維的加入，混凝土的抗壓強度、劈裂強度和彎曲強度都有不同程度的提高，但抗壓強度不及劈裂強度和彎曲強度提高顯著;對于同種鋼纖維混凝土，鋼纖維再生混凝土的抗壓強度、劈裂強度和彎曲強度比鋼纖維卵石混凝土的相應強度大;混雜尺寸鋼纖維混凝土的承載能力不如單一尺寸鋼纖維混凝土的承載能力;以再生混凝土作為基體的鋼纖維再生混凝土不僅可以「變廢為寶」 ，減少環境污染，實現資源的重復利用，而且其承載能力比鋼纖維卵石混凝土高很多。 3 .總結出鋼纖維混凝土抗拉強度和彎拉強度關系的計算公式。
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