粒度頻度 的英文怎麼說

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。

On the basis of lorenz - mie theory, this paper is devoted to the research on characteristics of intensity and spectrum distributions of each order rainbow for a homogeneous particle, with the usage of geometric optics theory, airy theory and debye theory

本文基於小粒子散射的lorenz mie理論，結合彩虹的其它理論（幾何光學理論、 airy理論、 debye理論）研究了均勻球、柱粒子各階彩虹強度分佈和頻譜特點。

The raw materials, the composition, the time of milling, the calcining temperature, the different additives, the sintering temperature and the sintering parameters were investigated. the result showed : it was advantaged to obtain high initial permeability mnzn ferrite with stable frequency characteristic using high - purity raw materials ; in order to obtain mnzn ferrite with high properties, we must control strictly the composition ; it could improve the properties of mnzn ferrite by optimizing calcining temperature. the lower calcining temperature made the permeability higher, and the higher calcining temperature could promote the frequency characteristic of permeability ; we chosen the right time of milling according to the requirement of power diameter ; in order to improve the properties of mnzn ferrite, it is necessary to add effective additives. in this dissertation, the influence of bi2o3 、 moo3 、 k2co3 、 co2o3 were investigated ; the sintering temperature, the time of heat - retaining and sintering parameters were the key factors of preparing high permeability mnzn ferrites

研究結果表明:採用高純度的fe2o3有利於獲得高起始磁導率且頻率特性優良的鐵氧體;為了制備所需性能的鐵氧體，需要嚴格控制配方中各種原材料的含量，優化配方;由於粉體活性受預燒條件的影響，所以對不同要求的鐵氧體選擇的預燒條件就不一樣，適當降低預燒溫度有利於獲得較高的起始磁導率，而為了獲得良好的頻率特性可以適當地提高預燒溫度;根據對粉體顆粒粒徑的不同需求，可以選擇不同的球磨時間;而有效的添加劑是改善材料性能的必要條件，本文在添加劑的研究中主要對bi2o3 、 moo3 、 k2co3 、 co2o3的影響分別作了詳細地討論;燒結溫度、保溫時間和燒結氣氛是高磁導率mnzn鐵氧體制備最關鍵的工藝，適宜的燒結工藝可以獲得理想微結構和組成，從而得到高性能的鐵氧體材料;而從材料的微結構上來看，要提高材料的截止頻率，就要適當地細化晶粒、增加晶粒內部的氣孔。

By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water

通過對細小顆粒在剪切流場中運動方程的fourier分析，得到了顆粒脈動強度和流體脈動強度之間的定量關系，表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素，首次從理論上證明了在一定條件下，顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度，為已有的實測資料提供了合理的解釋。

Second, an adaptive rate - distortion model is proposed by extending directed acyclic graph model for fine granular scalable video coding. we add rate, original distortion and adaptive scale to the directed acyclic graph model

其次，針對精細粒度可擴展視頻編碼技術，本文擴展有向無環圖模型，在該模型中加入碼率，原始失真和自適應因子等屬性，建立了自適應率失真模型。

Particle size weightfrequency distribution

粒度重量頻率分佈

This text completely and systematically studies the status and the development of the pyrolysis and the fluidization of biomass, which distill the bio - oil in the domestic and international area, as well as the existing problems. this thesis primarily include following aspects : ( l ), by experimenting and measuring the energy ( heat value ) and the content of c, h, n chemical element of right 20 kinds of common biomass, on the base of the experimental result, and respectively established the biomass energy predict experiment formula with the element of h and c is from change, and passed the ro. os examination, which provides the basis and convenience for flash pyrolysis fluidization device energy to convert the rate to compute with biomass energy utilization calculation ; ( 2 ), proceeded the tg and dtg experimentation equal velocity ( 10 ? / min, 20 ? / min, 40 ? / min, 60 ? / min ) heating and constant temperature heating by studying on eight kinds of biomass samples, according to the experimental data and arrhenius formula, we established the dynamics model of pyrolysis of, then, using the goast - redfern and p function, we also solved the dynamics parameters and analyze out every kind of biomass ' s frequency factor and parameters of activation energy, and established the every kind of dynamics model of pyrolysis of biomass, all of these provide the theories and basis to make sure the reactor ' s flash pyrolysis work temperature scope design and the describing of pyrolysis reactor dynamics ; ( 3 ), in order to study and ascertain the process of heat completely getting to pyrolysis time of varied size biomass particles, we observed and measured the ratio of length and diameter ( l / d ) with the varied biomass through electron microscope, we concluded the l / d ratios usually is from 5. 0 to 6. 0, the average is 5. 3 ; ( 4 ), we studied the process of biomass transiting and the theory of complete pyrolysis time with the theory of complicated heat field, we got the time ( t ) of the varied size biomass particles arriving to complete pyrolysis, and we knew that the complete pyrolysis time and the time which get to the biggest production ratio are identical, all of these studies provide the theory base for design and forecasting the flash pyrolysis reactor solid state resort time ; ( 5 ), according to the above experiment result, synthesize to make use of the engineering the mechanics, engineering the material, machine the design to learn the principle, deduce, establish the theory of rotation cone flash pyrolysis reactor material resort time ( t ) and reasonable rotation velocity ( or frequency ) relation theory ; and ( 6 ), we gave the reactor ' s smallest cone angle certain, reactor cone wall strength design theory, the reactor production ability theory, the power design method and the critical rotation velocity theory

本文較全面、系統地綜述了國內外生物質熱解液化制取生物燃油技術研究發展現狀及存在的問題，主要研究內容有： （ 1 ）實驗、測定了20種常見生物質的能量（發熱量）和c 、 h 、 n元素含量，根據實驗結果分別建立了以h和c為自變量的生物質能量預測經驗公式，並通過r _ （ 0 . 05 ）檢驗；為閃速熱解液化裝置能量轉化率計算和生物質能量利用率計算提供了依據和方便； （ 2 ）選擇了8種生物質試樣作了等加熱速率（ 10 min 、 20 min 、 40 min 、 60 min ）和恆溫加熱的tg和dtg實驗，根據實驗數據和阿倫尼烏斯公式建立了生物質熱解反應動力學微分方程，並採用goast - redfem積分法和p函數對其動力學參數進行了求解，解析出各種生物質的頻率因子和活化能參數，進而建立了各種生物質的熱解動力學模型，為科學確定反應器的閃速熱解工作溫度范圍及熱解反應動力學描述，提供了理論和依據； （ 3 ）為研究和確定不同尺度的生物質顆粒中心達到全熱解的時間，在體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了實驗觀察和測定，得出生物質的長徑比（ l d ）一般在5 . 0 6 . 0之間，平均為5 . 3的結果； （ 4 ）採用復雜溫度場傳熱學理論對生物質傳熱過程及充分熱解時間理論進行了研究，解析推導出了不同尺寸生物質顆粒中心溫度達到充分熱解溫度的時間（ t ） ，得出了理論推導的充分熱解時間與最大產油率的熱解時間相一致的結果，為閃速熱解反應器固相滯留時間設計和預測提供了理論依據； （ 5 ）根據上述實驗結果，綜合運用工程力學、工程材料、機械設計學原理，推導、建立了轉錐式閃速熱解反應器物料滯留時間（ ）與轉速（或頻率）合理匹配理論； （ 6 ）提出了轉錐式閃速熱解反應器的最小錐角設計、錐壁強度設計、生產能力設計理論和功率計算方法及臨界轉速理論等。

( 3 ) chapter v. plasma characteristics of rf ion source is investigated. a zero - dimensional numerical dynamic colisional radiative atomic and molecular ( cram ) model is suggested to simulate the microphysical process. all species " population number densities in plasma are calculated in non - thermodynamics equilibrium condition, and proton content in extracted ion current are measured with 60 ? magnetic analyzer

（ 3 ）提出了高頻離子源等離子體的零維cram模型（ collisionalradiativeatomicandmolecularmodel ） ，計算了非平衡態（ nte ）下等離子體中分子、電子、離子、基態原子、激發態原子等粒子濃度，並在zf - 200kev中子發生器上，用60磁分析器實驗測定了引出束流的質子比。

Linux is originally designed as a time - sharing operating system. due to its non - preemptive kernel, coarse time granularity, frequent disabled interrupt, virtual memory and other buffer mechanism, linux is not so “ real - time ” as rtos

Linux的調度機制決定了它是一個分時系統，其不可搶占的內核、粗糙的時鐘粒度、頻繁的關中斷、虛存和其它緩沖機構的設置，使得linux的實時性不強。

The gas - particles two - phase flows in the horizontal pipe and u - beam separator were also studied in this thesis. electrical capacitance tomography ( ect ) is a new method to measure the volume distribution of solids. it is not affected by the opacity of particles

實驗測量上，本文採用電容層析成象技術測量了旋風分離器內部顆粒的濃度分佈，分析了顆粒在分離器錐體部分的濃度分佈規律、概率及頻譜特性。

Abstract : this paper describes the thermal effects of a coaxial rf - excitedco2 laser ， based on the balance equations of electron density and energy ， current continuity equation ， and heat conduction equation. depende ncies of the spatial distributions of gas temperature on some discharge parameters arediscussed

文摘:通過求解放電等離子體中的帶電粒子密度和能量的平衡方程、電流連續性方程以及熱傳導方程，研究了同軸射頻（ rf ）激勵co2激光器中放電混合氣體的溫度效應，分析了有關放電參數對溫度分佈的影響。

The paper is about how to analyze web server ' s log file and the technology used and tries to improve it in the following aspects : ( l ) this paper presents a simple processing model on mining web log based on xml storage and the corresponding solutions used to clean and transform log data. ( 2 ) according to the advantages of xml and the self - structure feature of log data, the paper proposes the novel idea that stores log data in xml form, furthermore it discusses the method and implementation on how to store xml - compliant log data into the database by the medium - grained storage means. ( 3 ) this paper addresses an improved algorithm called ufapa for mining user frequent access path on the basis of the algorithm apriori

本文研究了web日誌挖掘中的相關技術，在以下幾方面進行了改進： （ 1 ）在web日誌挖掘模型的基礎上，對web日誌數據的清洗和轉換提出了相應的解決方法； （ 2 ）結合xml的優勢和web日誌數據的半結構化特點，提出用xml存儲日誌數據並探討了xml形式的日誌數據如何以中粒度方法實現在數據庫中存儲的方案； （ 3 ）結合用戶訪問路徑的特點以apriori演算法為基礎提出了一種改進的挖掘頻繁訪問路徑的ufapa演算法，介紹了演算法思想及演算法描述。

We introduced some characteristics of service - oriented architectures ; for example, to minimize the chattiness between a service and its client, the service must be coarse - grained, stateless, and must normally assemble a data transfer object that collects all the properties returned to the client application

中，我們介紹了面向服務的體系結構的一些特徵；例如，為了盡可能減少服務和其客戶機間頻繁的對話，服務必須為粗粒度的無狀態服務，而且必須正常組裝數據傳輸對象（ dto ） ，此類對象會收集所有從客戶機應用程序返回的屬性。

The grinder is a combinatoon of crushing, screening and seperating, recovering tiny powders powder grains can be proper adjusted, and it ' s an ideal equipment

該磨粉機是粉碎、篩選、超細粉分離回收的組合機組。粉末粒度可按需要任意調節，是頻繁更換花色品種的理想設備。

The grinder is a combination of crushing, screening and separating, recovering tiny powders powder grains can be proper adjusted, and it ' s an ideal equipment

該磨粉機是粉碎、篩選、超細粉分離回收的組合機組。粉末粒度可按需要任意調節，是頻繁更換花色品種的理想設備。

( 4 ) a video retrieval testing system is devised and implemented. it includes following subparts. a multi - granularity description model of video is proposed

（ 4 ）設計並實現了視頻檢索實驗原型系統，包括：提出了視頻的多粒度分層描述模型；設計了體現多粒度和多特徵的視頻相似性度量方法。

The particle size distribution can be adjusted to be coincident with the requirement of coatings and other product such as pigment, calcium carbonate, medicine and food

粉末粒度可按需要任意調節，是頻繁更換花色品種的理想設備。

To transmit with faster speed, higher spectrum efficiency and finer channel granularity is the requirement to the physical layer technologies

對於物理層的要求則是更高的傳輸速率，更高頻譜利用率以及更小的通道粒度。

This frame can be the foundation of new development in these fields, realizing the reuse of the frame design in large granularity ; 3. by analyzing and stat icing the wis, explicitly narrate the three common components, which have been used most widely, most effectively, and most worthy in this system

該框架可以作為領域內新系統的開發基礎，在一定程度上實現大粒度的框架設計復用； 3通過對web系統的分析統計，對系統中使用范圍最廣、使用頻率最高，使用價值最大的三類公共構件進行了詳細的說明。

The mean of pixel numbers in rice particle area, which represents yellow color, was selected as a color criterion to distinguish yellow rice kernels from the standard ones by comparison of these two kinds of rice images with a hue histograms

通過對標準米和黃粒米圖像色調直方圖的分析和研究，提出了以黃色區域的頻度均值作為特徵參數，區分標準米和黃粒米。