low-speed characteristic 中文意思是什麼

low-speed characteristic 解釋
低速特性
  • low : adj 1 低的；淺的，矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
  • speed : n 1 快，迅速。2 速率，速度。3 （汽車的）變速器，排擋。4 （膠片，照相紙）感光速度。5 〈古語〉興隆...
  • characteristic : adj 有特性的；表示…特性的，…特有的。 Japan s characteristic art 日本特有的藝術。n 特性，特徵，性...
  1. Depend on the comprehensive analysis and study of the structure, principle, and exterior characteristic of the motor, through the methods of system modeling and digital simulation analysis, two kind of control device that work for the low voltage ( lvdc ) and the high voltage ( hvdc ) in avigation are researched respectively. point to the control technique of close - loop speed stabilization at a limited adjustment speed range, we bring out the close - loop speed control method that using the rotor position sensor indirectly measure the speed of the motor

    在全面分析了稀土永磁無刷直流電動機的結構特點、工作原理、運行方式以及外部特性的基礎上，通過系統建模和數字模擬分析，分別針對航空低壓直流（ lvdc ）和高壓直流（ hvdc ）兩種電動機構用永磁無刷電動機，在小范圍轉速連續調節下的閉環穩速控制技術進行了詳細理論研究，提出了利用轉子位置傳感器信號間接測量電機轉速進行電機轉速閉環穩速控制的策略。
  2. These can provide consult for the performance ' s analysis of the type of diesel engine. besides, the author synthetically analysizes it ' s fuel - economy and exhaust emission characteristic, including three areas ( low, medium and high speed conditions ), and makes a conclusion that the diesel engine has superiority to be matched with the camion and mobile machinery shop

    另外，還對該型柴油機的燃油經濟性與排放特性進行綜合分析，全面分析了該柴油機常用功率范圍內的三個工況區域（低速工況、中間轉速工況、高速工況）的經濟性與排放性能，得出該柴油機與載重及工程用車配套具有優越性的結論。
  3. Early speed control systems on turbine all adopted pure mechanical hydraulic speed control systems, which had intrinsic defects. for example, the percentage of delay is large, dynamic regulation characteristic is bad, control accuracy is low, the operation is cockamamie, the running and maintenance are not convenient, and so forth. in order to solve these problems, it is necessary to substitute a completely new, advanced speed control system for previous mechanical hydraulic one

    早期的汽輪機調速系統均採用機械純液壓調速系統，機械液壓系統具有固有的缺陷，如遲緩率大、動態調節品質差、控制精度低以及操作繁瑣、運行、維護十分不便等，解決這些問題均要求採用一種全新、先進調節系統來取代原有的機械液壓式調節系統。
  4. As an effective traffic of light rail transit, it has been widely adopted by many large cities over the vorld, and a few cities of china are planning or building the light rail transit in our country, which has characteristic of saving investment, short construction period, high flexibility and low life - cycle costs for the light rail transit which can be constructed underground or high frame in crucial area, which can be suitable for the requirements of large capacity, high speed, safety and punctuality

    輕軌交通便是其中一種有效的交通方式，近幾年來在世界上各國大城市得到迅速發展，我國也有十幾座城市計劃或正在建設輕軌交通。其具有投資少、建設周期短、靈活性強、運行成本低的特點，可在關鍵地段和市中心區採用高架或地下鐵道結構，使其能運量大、速度快、安全、準點。
  5. The characteristic of the forming of shock wave in the tube and the influence of the shock wave intensity on cooling effect was also analyzed in working time. the reason why the cooling efficiency was lower in low rotate speed and has no change in high rotate speed was revealed

    分析了振蕩管實際工作時管內激波形成特點及激波強度對冷效應的影響，指出了實際壓力波製冷機在低轉速下運行時製冷效率很低而在高轉速下製冷效率變化不大的內在原因。
  6. The concept of the optimize design is proposed and its mathematic foundation is analyzed in this paper. after comparing several optical calculation methods, the one that is suitable for the lubricating system is chosen and analyzed in detail about its concept, characteristic and some focal points. meanwhile, combining with the analysis of the relationship among the parts and structure of marine low - speed diesel lubricating system, the internal disciplinary, other pipeline system and main engine, aiming at reducing the initial investment and the running cost in a certain years, the mathematic model of the system is built and the object function and subjected conditions are set up

    本課題闡述了最優化設計的概念，分析了最優化設計問題的數學基礎，比較了約束多維問題的幾種優化方法，選取了適合於潤滑油系統的優化設計方式，並對該方式的概念、特點及其應注意的問題進行了較詳細的分析；同時，結合海船低速柴油機潤滑油系統的組成部件及其結構以及潤滑油系統內部規律與其它管路系統、船舶主機的關系的分析，從經濟性的角度，以設備初投資及其在一定年限內的耗能費最低為目標，建立了本系統優化設計的數學模型，確立了目標函數和約束條件。
  7. In present thesis, the actual design theories and methods for super - low specific - speed pump are introduced first, including " the increased flowrate design method ", " the method of anti - hump on h ~ q characteristic curve ", " non - overload design method ", " the design method of complex impeller " and so on. according to these methods, 5 types of impeller have been designed

    論文首先對極低比轉數離心泵的現行設計理論和設計方法作了介紹，包括加大流量設計法、減小或消除揚程曲線駝峰的途徑、無過載設計及復合葉輪設計法等，並按照這些方法設計了五種葉輪。
  8. First super - low specific - speed centrifugal pump has a long and narrow flow passage for its high head and low capacity, and the power absorbed by disc friction is too high, so the efficiency is very low ; secondly the diffusion of flow passage is so high, that the reserved flow often emerges at the inlet and outlet of impeller. therefore the h ~ q characteristic curve is often hump - shaped, and at the low - capacity operating condition the instability often occurs ; thirdly the centrifugal pump at high - capacity operating condition is easy to overload because the n ~ q curve appears a rising trend

    首先由於它的揚程較高、流量較小，所以它的流道狹長，圓盤摩擦損失較大，效率相對較低；其次由於它的流道擴散較嚴重，易在葉片進口產生迴流和在出口產生脫流，揚程流量特性曲線易出現駝峰，在小流量工況下易產生不穩定現象；第三，由於其功率流量曲線呈現上升趨勢，在大流量區運行時電機易過載。
  9. Shock absorber is an important part of the vehicle suspension system. as an essential damping part of chassis components, shock absorber is closely connected with the operation, security and comfortabieness of the vehicle. the outer performance of shock absorber shall be indicated by the indicator diagram and the speed characteristic. the double - tube hydraulic shock absorber critical velocity is very low and easy to make outer performance degradation

    減振器在車輛懸架系統中發揮著重要的作用，作為汽車底盤的主要阻尼元件，它不僅影響到車輛的舒適性，還關繫到車輛的操縱性及安全性，其外特性由示功圖和速度特性表示；普通雙筒液壓減振器臨界速度較低，易發生外特性畸變，且低溫條件下更易發生畸變。
  10. North bridge is the center of communication with many high - speed buses and connects cpu, sdram, apg equipment and pci equipment. south bridge is connected to north bridge with pci bus, it has many low speed buses, such as isa, ide, usb, floppy disk, p / s2, serial port, parallel port. with its characteristic, this system has two million ethernet interfaces and one watch - control module

    其中，北橋是整個系統的核心通信部分，含有豐富的高速總線介面，連接了cpu 、 sdram 、 agp設備和pci設備；南橋和北橋通過pci總線互聯，它引出的總線一般速率比較慢，如isa 、 ide 、 usb 、 floppydisk 、 p s2 、串口、並口等。
  11. Hereafter being the forecasting to the old age population coefficient, this text has been applied two kinds of regression model, namely univariate linear model and logarithmic model, and thought over three kinds of economic speed of development ( high, middle, low ) in the logarithmic model to forecast the old age population coefficient respectively. finally, by analyzing the forecasted value and the inertia law of population development, the paper points out the lengthening of the population equally expected life span will push forward the aging of population step by step to the advanced age development ; the development trend of the population aging continues to be clear, and just appears a stage characteristic ; furthermore, the population aging speed in rural area will be faster than in the city

    此後是對老年人口系數的預測，本文應用了兩種回歸模型，即一元線性回歸模型和對數擬合模型，並在對數擬合模型中考慮了經濟發展速度的高、中、低三種方案，對老年人口系數分別進行預測；最後在分析預測值和人口發展慣性規律基礎上對山東省未來人口老齡化發展趨勢作了較深入分析，指出人口平均預期壽命的不斷延長，將逐步推動人口老齡化向高齡化發展；人口老齡化繼續發展趨勢明顯，且呈現出階段性特徵；農村人口老齡化速度將快于城市。
  12. In order to reduce the communication time between the high - speed and low - speed flows in 2d space, and to get the optimum interconnecting control of traffic flow to the highway pavement maintenance, the fluid characteristic parameters are utilized to appraise traffic conflict trend

    基於減少高速流和低速流在二維空間上的交匯時間，實現高速公路路面養護與交通流關聯最佳控制的要求，應用管道流變特性參數解釋高速公路養護作業產生的交通沖突特徵，建立了控制施工作業設備與高速交通流的數學模型。
  13. With the speed increment, not only 1 / 2x and 2 / 3x frequency component appear in low frequency segment, but also 4 / 3x frequency component begin to appear in high frequency segment. the amplitude of fraction frequency is usually larger than that of multiple frequencies. the nonlinear characteristic of torsion for rubbing rotor is similar with that of flexural vibration completely

    研究結果證實了扭振特徵和非線性特性用於該類故障診斷的可行性：從發生碰摩起，扭振分頻和倍頻相伴出現，轉速較低時， 1 / 2x成分突出，隨著轉速升高，不但有1 / 3x及2 / 3x分量出現，而且出現了4 / 3x成分，分頻幅值大於工頻及倍頻；彎振和扭振的非線性運動特性完全相似，扭振有抑制轉子系統復雜運動的能力。
  14. Quantum devices have very outstanding predominance, their high - speed high - frequency high - integrated and low - power characteristic, make them the very important devices in the use of vlsi in the future : this dissertation designed the binary nand gate and nor gate based on rt quantum devices

    而量子器件在這方面有著非常明顯的優勢，它以其固有的超高速、超高頻、超高集成度、高效低功耗等特點，在未來vlsi方面有著及其重要的應用前景，將成為21世紀信息技術的支柱。
  15. It has the characteristic of low cost 、 fast speed 、 high real - time and reliability. it is convenience for customer to design and extend their own applications by the opening protocol of can bus

    Ｃ Ａ Ｎ總線具有成本低、速度快、實時性和可靠性較高的特點，其透明開放的協議方便用戶自行定製和擴展。
  16. By discussing in detail the shapes and types of pump characteristic curves and the effects of geometrical parameters on them, this paper points out that the main reason of the brake horsepower of the low specific speed sewage pump increasing with capacity rapidly is that we often select larger geometrical parameters such as b2, ft and so on to enhance the capacity of the sewage pump

    詳細討論了離心式排污泵特性曲線的形狀和種類，以及幾何參數對排污泵特性曲線的影響，指出排污泵設計中增大b _ 2 、 f _ t等幾何參數是導致軸功率曲線隨流量增加上升很快的原因。
  17. The economic globalization degree is aggravated further, enterprises will face the global competitor while having global markets. agility, high speed and cooperate competition become cyber economy main characteristic of the competition ; innovation becomes the main source of obtaining competitiveness under cyber economy ; the customer, from the dull low level demander, grow into ones showing the individualized high - level demand. to meet these changes, enterprise strategy orientation must possess three characteristics : fast reaction, customer urge and key competitiveness

    經濟的全球化程度進一步加劇，企業將擁有全球市場的同時面對全球的競爭者；敏捷化、高速度以及協作競爭成為網路經濟下競爭的主要特徵，創新則成為網路經濟下獲得競爭力的主要源泉；客戶也從原來具有單調性的低層次需求發展為凸現個性化的高層次需求；為了適應這些變化，企業戰略導向必須要具備快速反應、顧客驅動以及把握核心競爭力這三個特點，這些都要求企業向敏捷化、柔性化的方向轉變。
  18. Experiments have proved that the developed subdivision driver is not only smaller, sampler in system, can shorten the delay time, improve the stability in low frequency and the torque - speed characteristic in high frequency, but has good self - adaptation and self - protection ability, and its stability and reliability are higher

    實驗證明，所研製的步進電機驅動器不僅體積小，簡化了系統設計，減少了級延遲，改善了低頻穩定性和高頻矩頻特性，而且有良好的適應性和自保護能力，提高了驅動器的穩定性和可靠性。
  19. Little systematical research has been carried out long after the new start scheme was presented, especially lack of quantified analysis of the nature of the system and the characteristic of torque output in standstill and low speed range

    單相交流勵磁作為一種新型的起動方案提出后，一直還沒有系統地、從數量關繫上揭開該系統的內在規律，特別是靜止和低速時起動轉矩的特性。
  20. Characteristic analysis of air valve of piston air compressor under low - frequency speed regulation

    活塞式空壓機低頻調速時的氣閥運行特性分析
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