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。
But the forces of integration that have created these good opportunities also make us more subject to global forces of destruction, to terrorism, organized crime and narco - trafficking, the spread of deadly weapons and disease, the degradation of the global environment
但是，這種世界融合的趨
勢一方面為我們創造了良好的機會，但同時使得我們在全球范圍內更容易遭致破壞性力量、恐怖主義、有組織的犯罪、販毒活動，致命性武器和疾病傳播的威脅。
Martin turned as he staggered, and saw the fist coming at him in a wild swing. quite as a matter of course he ducked, and the fist flew harmlessly past, pivoting the man who had driven it. martin hooked with his left, landing on the pivoting man with the weight of his body behind the blow
馬丁
一個趔趄，轉過身子，見那拳頭又狠狠飛來，便順
勢一彎腰，那
一拳落了空，那人身子卻旋了過去，馬丁左手
一個勾拳，落到正旋轉的人身上，拳頭加上旋轉力使那人側著身子倒到了地上。
The trend of the ec50 and the lc50 to four kinds of organism is similar to each other. daphnia magua straus is the most sensitive orgnism among the four orgnism according to the toxicity data, and photobacteriumphosphoreum is in the next place
酚類化合物對4種受試生物的ec _ （ 50 ）值和lc _ （ 50 ）值的趨
勢一致，其小，大型蚤對受試物的毒性反應最為敏感，其次是發光菌。
To acquire the vested right, usually certain condition will be met ; while in the contract when the main bodies contrast significantly, for the sake of the interest of the weak part, the acquisition of vested right should have to meet specific conditions
既得解除權的取得，
一般只需要滿足
一定條件；但在主體強弱
勢對比顯著的合同中，為了保護弱
勢一方的利益，既得解除權的取得除需滿足
一般條件外，還須滿足
一定的特殊條件。
The effects of mj on chlorophyll a and chlorophyll b had the same trend as the chlorophyll content. 2
Mj對蘋果葉片中葉綠素a 、葉綠素b和葉綠素總量的影響趨
勢一致，促進葉綠素a的降解程度比葉綠素b明顯。
A weakened chelsea disappointingly lost the replay 0 - 2 in london
但弱
勢一點的切爾西在倫敦的重賽中遺憾的0 ： 2輸掉了。
However, wingers ashley young and james milner looked in better shape as they caused the italian backline some nervy moments, and england finally made their deserved breakthrough on 24 minutes when nugent met leighton baines ' fine cross with a diving header to beat viviano
然而，邊路球員阿什利?揚和詹姆斯?米爾奈在比賽中有很好的表現，他們給義大利的後防線造成了幾次威脅，並且英格蘭最終在24分鐘后獲得了回報，紐金特接到雷頓?拜恩斯高質量的傳球順
勢一個魚躍沖頂得到了
一分。
The esaul, lovaisky the third, also in a cape, and a high cap, was a long creature, flat as a board, with a pale face, flaxen hair, narrow, light eyes, and an expression of calm self - confidence both in his face and his attitude
第三個是
一等上尉洛瓦伊斯基，他也戴皮帽，著氈斗篷，身材修長，身子像
一塊平板似的平平整整，面孔白皙，頭發淡黃，眼睛細而明亮，臉上的表情和騎馬的姿
勢一樣安詳，表現得怡然自得。
Lakers lead that grew to 12 points early in the third quarter became a 12 - point deficit with stunning swiftness midway through the fourth quarter, the nets riding a 19 - 7 run to exceed the 87 points they ' d averaged in their previous 13 games
在第三節早些時候湖人的領先優
勢一度達到了12分，然而在第四節居然落後了讓人眩暈的12分，網隊在打出19 7的攻擊波之後就達到了87分，那是他們在前13場的平均得分。
A lakers lead that grew to 12 points early in the third quarter became a 12 - point deficit with stunning swiftness midway through the fourth quarter, the nets riding a 19 - 7 run to exceed the 87 points they ' d averaged in their previous 13 games
在第三節早些時候湖人的領先優
勢一度達到了12分，然而在第四節居然落後了讓人眩暈的12分，網隊在打出19 7的攻擊波之後就達到了87分，那是他們在前13場的平均得分。
There was no change in his father's position, or in his spectral look.
他父親的姿
勢一點沒有更動，陰沉的臉色也依然不變。
To better take advantage of core language strengths, various developers have developed xml processing apis that are native to particular languages
要更好地利用核心語言的優
勢，
一些開發人員已經開發了本地針對特定語言的xml處理api 。
A standoff follows a bloody encounter between pakistani security forces and militant islamic students at the red mosque in islamabad
巴基斯坦警方與武裝的伊斯蘭教學生在伊斯蘭堡紅色清真寺發生流血沖突之後，局
勢一度緩和。
The two main development tendencies of environmental hydraulics were introduced, first, ecological hydraulics with the research subject changing from abiotic components to biotic ones ; second, to be associated with " 3s " techniques with research water area changing from small areas to river basins
摘要當前環境水力學發展有兩個重要的趨
勢，
一是研究對象由無生命組分進人有生命組分，向生態水力學發展；二是與「 3s 」結合，研究水域由小變大，向流域性水域發展。
It is a burning question how to change the superiority into economic superiority
如何將這些優
勢轉化為經濟優
勢，
一直是
一個亟待解決的問題。
In order to safeguard the laborers ' interests of the central party committee form the protection system from three aspects : ensure the employment opportunity, make labor standard system and set up the word protection system
摘要為了維護勞資對抗和沖突中弱勢一方勞方的正當權益，解放初期，黨和政府從保障僱工就業機會、制定勞動標準體系、建立勞動保護制度三方面構建新中國僱工權益保障制度，這一過程呈現出區分性、節制性和階段性的歷史特點。
