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。
Most genes act by producing a protein.
絕大多
數基因通過製造蛋白質的過程而起作用。
But i believe we had an easier task in that we were dealing with forms of human behaviour that were largely predictable - the profit motive, greed, herd instinct - and with the rule of the market and its imperfections
我們工作上所應付的都是牽涉人的行為模式市場規范及市場的不完善。由於人的行為大多
數基於圖利,有時甚至涉及貪念與羊群心態等動機,這些都是可以預計,因此相信我們的工作會較為容易。
Mixed - radix numeration system
混合
數基命
數系統
For c. violaceum, it is moderate treatment that all the corresponding parameters have the maximal value. but it still was maximal for leaf biomass, lar, ramose number of stem, stem biomass and umbrella number of flower. and the rgr of drought treatment in january exceeded the saturation treatment largely, but the difference among treatments was small in april
川明參與明黨參和峨參相應的生長參
數基本以中度水分條件下最大,但葉生物量、 lar 、葶分枝
數、葶生物量和花傘
數仍以飽和水分條件下最大;而1月份乾旱條件下的rgr遠高於其他兩種水分條件, 4月份則相差很小。
Philips, too, is moving upmarket to survive in a world where most basic products can be made in china
同樣的,身處多
數基本產品都可以在中國製造的今日市場,飛利浦正轉向高價位市場。
Background information on uv radiation uv index
紫外線及紫外線指
數基本資料
Aimed at this property hi which the effect of visco - elastic parameters appeared in late period, this paper proposes that parameters are not adopted as basic ones to predict settlement unless this computed parameters are similar in the course of back - calculation
針對粘彈性參
數對沉降的影響在固結後期才能明顯表現,提出通過對不同時間段觀測信息反演獲得的計算參
數基本一致時,才可作為沉降預測的
基本參
數。
It was not included in either the hebrew or most christian biblical canons, but could have been considered a sacred text by the sectarians
它並不包含在希伯萊文本和大多
數基督教聖經的教規里,但可能已經被宗派主義者視為一本神聖文獻。
On the other hand, they play an important role in the theories of esfimation for regression function. in this paper, we mainly get the large sample properties for partitioning estiona - tion and modified its estimation. for example, we proved their asymptolic normaity under nuture conditions by means of mortingle theory ; we also get their strong consistency for regression function under censored samples ; and finaly we genearzed the result to dependence sample and have strong consistency for the modified partitioning estimation of regression function
因此本論文研究了回歸函
數基於分割估計及改良
基於分割估計的大樣本性質,利用鞅的有關理論,在比較自然的條件下,證明了其漸近正態性;首次構造了截尾樣本的回歸函
數基於分割估計及改良
基於分割估計,並證明其強相合性;同時把有關結果推廣到相依樣本下(如混合) ,獲得了改良
基於分割估計的強相合性及收斂速度。
The new features we will be looking at are : optional command parameters, variable actions based on parameters, and internal grammar state variables
我們將查看的新功能是:可選的命令參
數、
基於參
數的變量操作和內部文法狀態變量。
Now, the most word sense disambiguation algorithm on the parallel corpora is limited in the context of the single ambiguous word and its alignment information. in this paper, we made full use of computability of the concept in the hownet and changed word sense disambiguation problem into the similarity calculation problem between the ambiguous word and the whole sentence of the other language. in this way, we disambiguated the ambiguous word from a new point of view and achieved the satisfactory result
當前大多
數基於雙語語料的詞義排歧演算法都局限在利用單個多義詞的上下文環境及其對應信息,本文則充分利用當前hownet資源中概念的可計算性,將詞義排歧的問題轉化為多義詞和另一種語言的相應句子的整體意義相似性問題,從一個新的角度來進行詞義排歧,因此得出了滿意的研究結果。
There were many researches focusing on point - to - point congestion control based on tcp. studies of congestion control in multicast are still in experiment phase. hardly is there any congestion avoidance control used in most multicast applications
目前,對
基於tcp協議點對點傳輸模式中的擁塞控制研究較多,而組播中的擁塞控制的研究還處于實驗研究階段,大多
數基於組播的應用還沒有一種合適的擁塞控制機制或完全沒有採用擁塞控制。
Contains all the essential amino acids and has only a few calories
含多數基本的胺基酸,低卡路里。