總阻力系數 的英文怎麼說

中文拼音 [zǒngzǔlìxìshǔ]
總阻力系數 英文
coefficient; total drag
  • 總 : Ⅰ動詞（總括; 匯集） assemble; gather; put together; sum up Ⅱ形容詞1 （全部的; 全面的） general; o...
  • 阻 : 動詞（阻擋; 阻礙） block; hinder; impede; obstruct
  • 力 : Ⅰ名1 （力量; 能力） power; strength; ability; capacity 2 [物理學] （改變物體運動狀態的作用） forc...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 阻力 : 1 （阻礙事物發展的外力） obstruction; resistance 2 [物理學] resistance; drag; drag force; nowel; ...
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. And experimental study on the heat transfer performance and pressure drop characteristic of the process of bubbling evaporative cooling are carried. as there are so little attention and studies on the process bubbling evaporative cooling about heat transfer in the world at present, this paper mainly deals with the effects of the different bare tower velocity, weir height, heat flux density and plate perforation geometries on the heat transfer coefficient and the pressure drop of the process of air flowing

    由於目前國內外對鼓泡蒸發冷卻過程在換熱方面的關注和研究較少，本文對不同空塔速度、不同堰高、不同熱流密度、多孔板的不同幾何尺寸對換熱系數及空氣流動過程阻力的影響進行了實驗研究及理論分析，總結了本實驗條件下換熱及阻力的實驗關聯式。
  2. Exciting method is used to measure the damping, the four damping coefficients of the radial part and a damping coefficient of the thrust part can be obtained though hammering the testing bearing which is in a equilibrium position. based on the testing data, the dynamic characteristic curves of the radial - thrust floating ring hybrid bearing are drawn and compared with the theoretical curves

    採用激振法測量軸承的阻尼，對處于平衡位置的測試軸承分別沿水平方向、上45度方向及軸向進行錘擊，根據錘擊法原理求得各個轉速下軸承徑向部分內、外膜總阻尼系數以及推力部分內、外膜總阻尼系數。
  3. The method is described as follows : the velocity of the moving part and the gas chamber pressure were measured with a dynamic test measurement system ; a dynamic model was built on force analysis of the moving part ; the total kinetic resistance replaced the horizontal friction and water resistance ; then the resistance - velocity relation curves at moving stages were obtained ; with the empirical formula of the gas chamber pressure and the resistance - velocity relation curves, the preliminary dynamic characteristics were analyzed and the structural form and key parameters of an underwater assault rifle were determined

    具體方法為：由動力學測量系統測得活動件速度和氣室壓力；分析活動件的受力，建立動力學模型；以運動總阻力代替水平方向上的摩擦阻力和水阻力，獲得各運動階段的阻力速度關系曲線；利用氣室壓力經驗公式和阻力速度關系曲線，對水下突擊步槍進行初步的動力學分析，確定其構造型式及主要參數。
  4. 3. it studied the radiation problem of tlp, and paid attention to the computation of added mass and added damping about tlp which cylinders are set as regular polygon

    3 .研究了張力腿平臺的輻射問題，重點研究了浮筒柱正多邊形分佈情況下，總體輻射附加質量和阻尼系數計算問題。
  5. According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system

    針對研製任務的要求，課題期間研製了下位機系統硬體和軟體，開發了上位機監控軟體，其中所作的具體工作包括：測量原理的研究和在系統中的實現，在本次設計中用三種方法來進行水位測量，分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法；主控晶元的選擇，我們選用了高集成度的混合信號系統級晶元c8051f021 ；實現了信號的採集和處理，包括信號的轉換和在單片機內的運算；高集成度16位模數轉換晶元ad7705在系統中的應用，我們完成了它與單片機的介面設計及程序編制任務；精確時鐘晶元ds1302在系統中的應用，在此，我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬，該晶元的應用給整臺儀器提供了時間基準，方便了儀器的使用；另外，針對研製任務的要求，還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測，該部分的實現是通過採用ad421晶元來完成的，本設計中完成了ad421與單片機的spi介面任務，協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系，並完成了程序設計；與上位機的通信介面設計，該部分通過兩種方法實現： rs232通信方式和rs485通信方式；系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。
  6. The relationship between the resisitivity and the stress was simulated by matlab software. based on the mathematical and physical strength model, the resistivity in different thickness of the composite was attained, and the total resistivity was attained through the integral of thickness, which is basically identical with the tested resistivity

    用matlab軟體模擬了應力與電阻率的變化關系式，再結合數學物理力學模型，得到了組元不同厚度處的電阻率值，通過對厚度求積分得到的總電阻率值，與實測電阻率值基本吻合。
  7. At last, in according to the experiment results, the interpretation of the mechanism of the slip phenomenon of prepressing - contact spring - damping system was given in this dissertation. further more, the relationship among the limit frequency, the value of prepressing, excitation frequency, the amplitude of excitation and the materiel parameter was analyzed. base on the theory analysis the limit frequency formula was given, and the contact - slip condition for engineering application was concluded

    最後根據理論研究與試驗分析的結果，分析預緊接觸式彈簧阻尼系統產生滑移現象的機理以及共振峰值漂移現象的理論解釋，並通過定性分析接觸分離時的頻率與預緊量、激勵頻率、激勵力幅值以及墊層的材料參數之間的關系，提出能定量描述系統出現滑移現象的極限頻率公式，總結了預緊接觸式結構始終保持接觸的條件。
  8. The experimental results of the flow characteristics of the mmc heat sink indicate that the critical reynolds number signifying the transition from laminar flow to turbulent flow is in advance ; under the same experimental conditions, the variation in entrance direction of the microchannel inlet and outlet has little effect on the microchannel ; the experimental values of the friction factor of the de - ionized water in a microchannel agree well with those calculated using the theoretical laminar formula ; furthermore, a comparison of the experimental results and simulation results shows that navier - stokes equation and rng - turbulence model can be used to model the laminar and turbulence flow regions in a microchannel ; meanwhile, the correlations of the flow resistance in the turbulent flow regions for the de - ionized water as the working fluids are obtained from experiments

    對歧管式單通道熱沉流動特性的研究結果表明，微通道內流體流態由層流向紊流轉變的臨界雷諾數提前;改變流體的進出口方向對熱沉總壓降造成的影響很小;摩擦系數的實驗值與理論值較接近;數值模擬結果能夠與實驗值較好吻合;並由實驗給出了紊流區流動阻力的實驗關聯式。此外，選用十二烷基硫酸鈉（ sodiumdodecylsulphate ， sds ）以及烷基多糖苷（ alkylpolyglycoside ， apg ）作為減阻添加劑，研究了表面活性劑添加對微通道流動特性的影響。
  9. A system scheme of digital image collection plus spread spectrum communication ( abbreviated as ssc ) is presented in this paper after a full analysis of noise characteristics, attenuating characteristics and impedance characteristics of low - voltage power lines

    本文首先介紹了低壓電力線的噪聲特性、衰減特性和阻抗特性，然後提出一種數字圖像採集+擴頻傳輸的系統總體方案。
  10. The calculating formulas show that braking distance depends on initial braking speed, road dragging coefficient, mad slope grade, braking force increasing time ; and nothing to do with total mass of crane

    計算公式表明：決定汽車起重機制動距離的主要因素是制動初速度、路面阻力系數、道路坡度和制動力增加時間；汽車起重機總質量與制動距離無直接關系。
  11. According to the the regression analysis on the bloting and shotcreting roadways of henan pingmei group, the regression equation on the degree that absolute grade and area of roadway influence coefficient of frictional resistance is built in the paper. the notable character test of the regression equation is completed. at last, the degree that absolute grade and area of roadway influence coefficient of frictional resistance is discussed and summed up. the practical and guiding sense in choosing coefficient of frictional resistance of congeneric roadways is given in the paper

    通過對平煤集團大量的錨噴巷道的回歸分析，建立了巷道壁面絕對粗糙度和巷道斷面積對摩擦阻力系數影響程度的回歸方程，並對回歸方程作了顯著性檢驗，最後對巷道粗糙程度和斷面積對錨噴巷道摩擦阻力系數的影響程度進行了討論和總結，對同類巷道摩擦阻力系數的選取具有實踐指導意義。
  12. Firstly a mathematical swath in full scale is studied. the numerical results of total pressure, wall shear stress, corresponding viscous resistance coefficient at different velocity and so on are obtained. the computational viscous resistance coefficients are compared with the estimated ones using empirical formula and the results are found to be in good agreement

    首先對一swath數學船型做了研究，得到不同航速下的物面總壓力、物面切應力分佈及相應的粘性阻力系數等結果，並將各航速下的粘性阻力計算結果和經驗公式估算結果做了比較，吻合得較好。
  13. There are a lot of advantages when inner trachea applied in air pre - heater, such as the improvement of the temperature of pipe, the low consumption of metal, except for the increment of flow resistance. according to many related papers, it is more proper inner trachea with the structure of short distant between two whorls and shallow depth of whorl. it can enhance heat transfer with smaller flow loss

    內螺紋管是一種異形管，和光管相比，管內側的換熱系數大大增強了，應用於空氣預熱器可以起到提高總傳熱系數、節約受熱面金屬消耗量的目的；同時提高了管壁溫度，能夠減輕低溫腐蝕的程度和速度；不足之處是帶來了更大的阻力損失。
  14. Taking some tubular air pre - heater used in one boiler whose capacity is 130 t / h as an example, new blue print with inner trachea is completed by means of computer program. several key design variables may be changed, such as diameter of pipe and velocity of flow of gas. these cases have been considered, and their results have also been compared with each other

    比較了幾個重要的設計變量，如外管徑、煙氣流速等參數變化時，總傳熱系數和空預器本體管子總重量，阻力損失以及最低管壁溫度等幾個重要設計結果的變化趨勢，對內螺紋管空氣預熱器的設計具有借鑒意義；其間還分析了內螺紋管與光管在設計時的不同之處；最後，初步分析了內螺紋管的優化設計問題，提出了一些建議。
  15. Ami - sliding safety factors are attained when total sliding force and total anti - sliding force are calculated through normal stress and shear stress acting on the element interfaces

    其次，利用剛體彈簧元法求解單元交界面上的正應力和剪應力，從而積分求得滑移路徑上的總滑動力和總阻滑力，進而求得各滑動面的抗滑安全系數。
  16. In this thesis, a single disk rotor supported by two rolling bearings is used for studies, and a new method of reducing the vibration is proposed. the main works of this thesis are as follows : based on the comparison of various control methods for vibration suppression, a kind of passive electro - magnetic damper is presented. the structure of it is similar to that of the active magnetic bearing

    為了降低轉子的振動，增加系統的穩定性，本文在總結當前國內外學者研究的基礎之上，提出了被動式電磁阻尼器的概念，並確立了本文的研究目標和研究方法：以工程應用為背景，結合轉子動力學理論、電磁學理論以及數據採集技術，以理論輔以實驗的方法，對被動式電磁阻尼器特性進行深入研究。
  17. Respective simulation of the liquid cooling system and the circulatory system of cooling fluid, which mainly concerns the simulation model of the four major components in the refrigerating system and the water pumps and heat exchangers in the cooling circulatory system. experimental research of the assembled system of liquid cooling system, which yields the system perform parameters of refrigerating capacity and resistance loss in different working conditions. collection and comparison of the experimental data got from simulation and experimental research, which proves simulation and the experiment result are well tallying, hereby, testifies the emulational veracity of the cooling system

    主要對製冷系統中四大部件和冷卻液循環系統中的水泵、換熱器進行了數學建模;利用組裝的液冷源系統進行實驗研究，得到不同的工況下系統的製冷量、阻力損失等系統性能參數;對模擬和實驗研究中得到的大量實驗數據進行匯總比較，發現模擬和實驗結果吻合較好，驗證了液冷源系統模擬的準確性。
  18. The paper summarizes the development of the control technology of paver ' s vehicle system ; discusses the feasibility of the plc application to vehicle system ; calculates and examines the working resistance and power of the control system as well some concerning parameters of the hydraulic system ; builds the driving system velocity characteristic ; accomplishes the hardware design and the software design according to the functional requirements of vehicle system and the features of plc ; adds the pid compensation to the closed circuit velocity control ; sums up the mathematic model of hydraulic pump - motor system and defines the controller parameters ; in the end, the simple dynamic simulation basing on the control system model and the simulative test are carried out to testify the reasonableness and the feasibility of the designed plc control system

    本文總結了攤鋪機行駛控制技術的發展，討論了plc應用於行駛系統的可行性；計算和校驗了控制系統工作阻力、功率及液壓系統有關參數；建立了行駛驅動系統的速度特性；結合行駛系統的功能要求及plc的特點，完成了控制系統的硬體設計和軟體設計；對其速度閉環控制，引入了pid校正環節；歸納了液壓泵?馬達系統的數學模型，確定了控制器的控制參數；最後對控制系統模型進行了簡單的動態模擬和plc模擬試驗，初步證實了控制系統設計的可行性和合理件。
  19. A preliminary analysis of the suction penetration mechanism is made, the influence of negative pressure on the penetration resistance and soil character are studied in conbination with the cb20b platform field test data, and the relationship between negative pressure, penetration depth and penetration speed are summarized

    對負壓沉貫的機理進行了初步分析，結合cb20b桶形基礎計量平臺的現場測試數據，研究了負壓對桶形基礎沉貫阻力的影響及對土壤特性的影響，同時對負壓、沉貫深度、沉貫速度之間的關系進行了總結。
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