length to diameter ratio 中文意思是什麼

length to diameter ratio 解釋
長度直徑比
  • length : n. 1. 長，長度，長短。2. （時間的）長短，期間。3. （賽艇的）一艇的長度；一馬的長度。4. 程度，范圍。5. 【板球】球程；投至適當距離的球。6. 【語言學】音長。7. 一段，一節。
  • to : adv 到某種狀態；〈特指〉到停止狀態；關閉。 ★也常和動詞結合，略去其後賓語，而構成成語： The door i...
  • diameter : n. 1. 直徑。2. （顯微鏡等的）放大倍數。
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. For increasing the effective material peak - value power ( empvp ), solving the contradiction between enhancing the pmsm ' s flux - weakening capability in the electromotor state and reducing the pmsm ' s connatural adjustment ratio in the dynamotor state and improving the efficiency of the pmsm, some solving method are taken as follows : the influence of length / diameter ratio to the empvp is analyzed, and the optimum size of length and diameter is chosen

    主要是從提高電機的有效材料峰值功率、解決pmsm提高電動機運行狀態時的弱磁擴速能力和減小發電機運行狀態時的電壓調整率之間的矛盾及提高電機的效率著手，分析了長徑比、氣隙長度對有效材料峰值功率的影響，並確定了它們的最佳尺寸。
  2. Since the discovery of cnt ’ s and find that cnts have small diameter and high length diameter ratio and can be look as one - demission material, it can be used as emission emitter of fed. especially, the aligned cnts array can be seen innumerable single cathodes which are lined regularly and form array. so growing aligned cnts array in selective area is the key technology to product cnts fed, which is also the necessary condition of cnts micro - electronics device

    自碳納米管發現以來，由於碳納米管的直徑很小、長徑比大，故可視為準一維納米材料，可作為場發射平板顯示的尖端發射體，特別是定向碳納米管陣列可看成是無數根單尖陰極規則的排列起來形成陣列式，是理想的場發射平板顯示器的尖端發射體。
  3. The sealing property problem for the stirring shaft of high - speed pressured reaction axe with large length to diameter ratio is always a difficult problem to study for design era and users

    摘要高速大長徑比壓力反應釜攪拌軸密封性能問題一直是設計者與使用者研究的難題。
  4. The experimental research verified that this method had probed a new way for solving the sealing problem of stirring shaft of high - speed pressured reaction axe with large length to diameter ratio

    實驗研究證明，該方法為解決高速大長徑比壓力反應釜攪拌軸密封問題探索了一種新途徑。
  5. On the basis of magnetic fluid sealing principle and micro - nano characteristics, this paper studied and designed a kind of new micro - nano magnetic fluid sealing structure that could satisfy more nicely the sealing requirements of stirring shaft of high speed pressured reaction axe with large length to diameter ratio, and by means of experiment the optimization de sign was carried out on its relevant parameters

    該文根據磁性流體密封原理和微納米特性，研究設計了一種能更好地滿足高速大長徑比壓力反應釜攪拌軸密封要求的新型微納米磁性流體密封結構，並通過實驗對其相關參數進行了優化設計。
  6. The main results in this paper are as follows : ( 1 ) study on starting up performance of thermosyphon : according to the study on the states before and after starting up of thermosyphon with the various filling amount, it is considered that the phase change heat transfer inside the copper - water thermosyphon with a large ratio of length and diameter is not only influenced by the boiling degree of superheat, but also controlled by evaporation and companied with the boiling of the thin liquid film

    本文的主要研究結果為： （ 1 ）熱虹吸管啟動性能的研究：通過對從不同充液量、啟動前狀態、內部汽化核心狀態對啟動的影響所進行的試驗研究，認為大長徑比的銅?水熱虹吸管管內相變不僅僅為沸騰，而是以蒸發為主，伴有薄液膜的沸騰。
  7. 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。
  8. Length to diameter ratio of screw

    螺桿長徑比
  9. Screw length - to - diameter ratio

    螺桿長徑比
  10. The maximum service temperature of magnet is changeable due to the ratio length and diameter and environmental factors

    最大工作溫度依賴于磁體的長徑比、塗層和環境因素。
  11. Main research contents and achievements of this thesis is as follows : l. this paper carries through particular test and analysis to the basic physical - chemical properties of gaojiawang palygorskite, an environmental mineral fibre, by xay, ir, tem, sem etc. this paper has also discoursed upon the development appliance research status in quo and directions of palygorskite. 2. according to the preceding surface modification research achievements to nonmetal mineral materials, the author combines the self characteristics of palygorskite such as the ratio of length and diameter, typical nano - rank particle diameter, big ratio surface area, well - developed crystal growth imperfection and lattice defect etc. the author also designs organising modification ortho - experimentation of palygorskite by adopting iso - propyl alcohol as thinner of wd - 51 and ndz - 401, and acquires the best craft parameters and craft conditions for gaojiawang palygorskite original ore organising modification, namely : wd - 51 concentration 1. 6 % ( wt % ), modification temperature 120 ?, and modification time 60 mins ; ndz - 401 concentration 2. 0 % ( wt % ), c modification temperature 120, modification time 80 mins

    在前人對非金屬礦物材料表面改性的基礎上，結合環境礦物纖維?坡縷石自身的特點（如：長徑比、典型的納米粒徑、大比表面積、發育的晶體生長缺陷和晶格缺陷等） ，通過對坡縷石有機化改性設計正交試驗，採用（ ch _ 3 ） _ 2choh作為稀釋劑，獲得了採用wd - 51和ndz - 401對高家窪坡縷石原礦進行有機化改性的最佳工藝參數和工藝條件，分別為： wd - 51的濃度為1 . 6 （ wt ） ，改性溫度為120 ，改性時間為60min ； ndz - 401的濃度為2 . 0 （ wt ） ，改性溫度為120 ，改性時間為80min 。
  12. In this paper, the theory for lateral vibration of pile foundation with consideration of shear deformation of pile is established, and the influence of the ratio of pile length to its diameter, the ratio of pile stiffness to soil stiffness and dimensionless frequency were studied systemically

    本文建立了一整套考慮樁體剪切變形的樁基水平振動分析理論，並較系統地研究了樁的長徑比、樁土剛度比、激振頻率等因素對樁基水平動力響應的影響。
  13. By using the solution developed and the frequency - dependent stiffness coefficient and damp coefficient, the dynamic behavior, especially the one concerned with the variation of the dimensionless maximum response along the depth, for the pile with finite length or with infinite length was studied. it was shown that to simplify computation a pile of finite length can be taken as the one of infinite length if the ratio of pile length to its diameter ( i. e. lid ) is greater than 15

    利用所得解，採用與頻率相關的剛度系數和阻尼系數的近似表達式，對有限長樁和無限長樁的動力特性特別是對最大無量綱響應沿深度的變化曲線進行了參數研究，表明在常見樁土參數下，當長徑比大於15時，可將有限長樁視為無限長樁以簡化計算。
  14. At the same time, the program corresponding to the proposed method is compiled in fortran90, which is used to analyze the influence of several factors on behaviour of barrettes, including ratio of length to width, ratio of depth to equivalent diameter, ratio of modulus of pile to soil, possion ' s ratio, the finite layer etc. many useful conclusions are obtained from the above analyse

    該方法考慮了壁板樁樁身橫截面的非軸對稱性，並用fortran語言編制了相應的程序，進而分析了多種因素對壁板樁承載特性的影響，包括長寬比、樁徑比、樁土剛度比、泊松比以及有限壓縮層深度等。
  15. At the same time, the corresponding programs on the above two methods can be compiled in frotran90 respectively, which are used to analyze the influence of several factors on behaviour of barrette pile group and barrette pile group - soil - cap interaction, including collocation of pile, ratio of length to width, pile spacing, ratio of depth to equivalent diameter, ratio of modulus of pile to soil, possion ' s ratio, the finite layer, the number of piles etc. lastly a series of model tests on vertically - loaded bahaviour of single pile are made, tests results are analyzed, and the causes of tests failure are preliminarily discussed in this paper

    分析了群樁布置形式、長寬比、樁與樁之間的相對距離，樁徑比、樁土剛度比、泊松比、有限壓縮層深度以及群樁根數等因素對壁板樁群樁和壁板樁群樁?土?承臺的相互共同作用問題的影響。論文最後做了一組壁板樁和圓形樁單樁模型試驗，對試驗數據進行了分析，並對試驗中存在的問題進行了初步探討。
  16. The threshold speed and the typical characteristics of the oil whip of the system are simulated under the nonlinear model of oil film force, and the state of motion and type of the bifurcation are analyzed by floquet multiplicators which is computed by the shooting method. secondly, the the nonlinear dynamical model of the low - pressure rotor - bearing system by column bearing with reduced dimensions is presented. the numerical results show the rule of the amplitude with the eccentricity of rotor, the length - to - diameter ratio, oil viscosity and the clearance - to - radius ratio of the bearing under the definite speed

    其次，對降維后的低壓轉子?軸承系統的非線性動力學方程，計算了圓柱瓦軸承支撐的轉子系統的振動穩定性在固定轉速下隨偏心距、軸承長徑比、潤滑油動力粘度和軸承間隙比的變化規律，並分析了轉子前軸承軸頸的失穩轉速與轉子偏心距、軸承長徑比、潤滑油動力粘度和軸承間隙比之間的關系，同時利用floquet理論分析其運動狀態和分岔類型。
  17. The maximum service temperature of magnet is changeable due to the ratio length, diameter, coating and environmental factors

    最在工作溫度依賴于磁體的長徑比、塗層和環境因素。
  18. By fitting 106 testing date of cast - in - place piles, the experiential formula between the e and c # as well as l / d ( ratio of length and diameter of pile ) and, the experiential formula c and base resistance qc / pa from cpt of pile surrounding soil are given. finally, we put some examples to testify this theory

    通過對51根打入樁的15組樣本數據的試樁資料進行分析計算，建立了_ e與樁與樁側土的剛度比r之間的經驗公式； _ c與樁側土的靜力觸探成果f _ s p _ a之間的經驗公式。
  19. Uniform distribution of cavitation at the nozzle exit section is obtained by increasing length - diameter ratio and leads to the improvement of atomization

    從燃油空穴霧化理論的角度出發，空穴強度的提高以及在出口截面上的均勻分佈都有利於燃油的破碎霧化。
  20. We take depth research of steel fiber polymer concrete reinforced principle from the compound mechanics theories and interval theories, summing up the material function influence regulation of the different length - diameter ratio steel fiber, revising to establish the mechanics model of confusion direction distributing steel fiber polymer concrete

    從復合力學理論和纖維間距理論對鋼纖維聚合物混凝土的增強機理進行了深入的研究，總結出了不同長徑比的鋼纖維對材料性能影響規律，修正建立了符合亂向分佈的鋼纖維聚合物混凝土的力學模型。
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