時間導數 的英文怎麼說

中文拼音 [shíjiāndǎoshǔ]
時間導數 英文
time derivative
  • : shí]Ⅰ名1 (比較長的一段時間)time; times; days:當時at that time; in those days; 古時 ancient tim...
  • : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
  • : 動詞1. (引導) lead; guide 2. (傳導) transmit; conduct 3. (開導) instruct; teach; give guidance to
  • : 數副詞(屢次) frequently; repeatedly
  • 時間 : time; hour; 北京時間十九點整19 hours beijing time; 上課時間school hours; 時間與空間 time and spac...
  1. The chelsea midfielder, who covered more on - pitch miles than anyone at the club last season, was one of a record - breaking number who took part in the world cup, leading to a reduction in the amount of games and training sessions that could be undertaken before this year ' s premiership began

    這位切爾西中場,在上賽季比俱樂部每一個的球員上場都多,他還參加了世界盃,是世界盃球員中破紀錄的一員, (射門次最多) ,這致了他在本賽季開始前,不論是比賽還是訓練,都顯得很疲憊,狀態欠佳。
  2. Dr randall burd, a pediatric surgeon and researcher at robert wood johnson medical school, and colleagues looked in particular at postoperative complications, the length of time the patients spent in hospital, how much the hospital charged, and the number of deaths as a result of the surgery

    兒外科醫師、羅伯特.伍德.約翰遜醫學院研究員蘭德洱.伯德博士及其同事細致調查了手術並發癥、住院、費用和由於手術致的死亡目。
  3. On one hand, numerical derivatives provide proper search directions in optimization, therefore their accuracy is of great importance for fast convergency. on the other hand, derivative evaluation is one of the most time - consuming steps in optimization

    當前的高性能學規劃演算法大都依賴于計算以快速收斂到最優點,所以對求精度的要求比較高;而計算所消耗的占優化的比例又非常的大。
  4. For a soil or rock of water - lacked, a heat transfer theoretical model is developed, which is a steady or unsteady, the results show that reservoir temperature, thermal diffusion coefficient, inlet temperature, flow rate of and run time of ground source heat pumps have an effect directly on heat transfer process of dhe. it can deduce that intermit running is favorable for this type of soils and rocks

    對于貧含水地下巖土層建立了穩態與非穩態傳熱的理論模型,分析結果表明,巖土層的熱儲溫度、溫系、埋地換熱器進水溫度、流量以及地源熱泵系統的運行或開停機比,都對埋地換熱器的傳熱過程產生直接影響,可以推斷,對于該類型巖土層的地源熱泵系統,採用歇運行將是有利的。
  5. Abstract : in this paper, traffic data collection techniques for traffic flow guidance systems are analyzed. a modified licence plate recognition method, which is suitable for travel - time investigation in busy streets, is proposed

    文摘:討論了交通流誘系統的交通流量、行程和行程速度的採集技術,提出了一種改進的牌照識別法,該方法適合於交通流密集路段上的交通據採集。
  6. Represents the signed time zone offset of your system from greenwich mean time measured in hours and minutes. for example, the offset for a computer in the pacific standard time zone is " - 08 : 00 "

    偏移量總是顯示為帶有前或尾隨符號(零顯示為「 + 00 : 00 」 ) ,指示早於格林威治( + )或遲于格林威治( - )的小
  7. To air - condition temperature control system, in this paper, firstly, the mathematical model is established by using the differential equations method. though equations deducing to find the control object, which is the relationship between the rooms " temperature - time constants and control system ' s kinds of performance indexes, elucidate the effects of the big rooms " temperature - time constans to the control system. then combined with the requirements of air - condition craft to the control, it is proposed that the main question needed to be solved under the air - condition control system designing is its quickness

    本文首先針對空調溫度控制系統,建立學模型,採用微分方程法,通過公式推,找出空調控制對象? ?房溫度與系統各項性能指標的關系,闡明房溫度大對控制系統的影響,再結合空調工藝對控制的要求,提出了對空調控制系統的設計應主要解決其快速性問題。
  8. This paper gives a method to measure the conductivity base on choosing frequency. after adding to the electrode with two ac square waves of appropriate frequencies, we can measure the output dc voltage of the circuit

    本論文提出了一種選頻電率測量方法,選擇兩個合適頻率的交流方波施加於電極,測出電路輸出直流電壓,通過解方程組求出,然後求得溶液電阻,進而得到溶液電率。
  9. In this paper, monte carlo ( mc ) method is used in the research of distributing of construction duration and computation of time parameter of pert network. according to probability viewpoint, critical line and key degree of activity in the network are also defined. aiming at the limitation of application of the mc in large scale the network, the simplified computational method for the network is presented with quantum probability theory and composite method of path in network

    本文用mc ( montecarlo )方法研究了施工工期的分佈規律和pert ( programevaluationandreviewtechnique )網路的的計算;用概率論的觀點定義了pert網路主線路和關鍵度;針對大型施工進度網路mc方法應用的局限性,採用線路合成方法,引進當量概率概念,提出了pert網路的簡化計算方法;根據工程搭接施工網路的特點,將其轉化為廣義pert網路,探討了其施工進度風險的計算。
  10. Define time periods data source dimension wizard

    定義段(據源) (維度向
  11. On the basis of time interval calculate formula which has been deduced, this paper offers the recommended length of digital signal orbital circuit in the condition of the minimal of the time interval

    本文在推出列車安全計算公式的基礎上,提出了基於最小列車安全字軌道電路長度的推薦值。
  12. The fourth - order compact difference schemes with high resolution are applied to discretize the space derivatives, and a low - storage fourth - order explicit runge - kutta scheme is used in time marching

    文中採用具有高解析度的4階精度的緊致差分格式離散空,同步進採用低存儲量要求的4階顯式runge - kutta格式。
  13. The momentum equations are integrated in time using the four - stage explicit jameson runge - kutta algorithm and discretized in space using fourth order accurate compact scheme as well as the pressure poisson equation

    動量方程的時間導數採用四步jamesonrunge - kutta法,空和壓力poisson方程均採用四階高精度緊致格式。
  14. Numerical fluxes considered in the explicit portion of the algorithm were evaluated by an implicit high - order compact scheme to augment stability. meanwhile, an implicit high - order compact numerical filter was used

    顯式一邊的空採用具有較高精度和良好值穩定性的隱式高階緊致差分格式,同採用適于低馬赫流動計算的隱式高階值過濾方法。
  15. Nonphysical time is introduced and the lower - upper symmetric successive over - relaxation ( lu - ssor ) scheme is modified in navier - stokes equations. an application to natural unsteady viscous flow is presented to check for the capability of the procedure

    在原控制方程中引入偽時間導數項,對上下對稱逐次超鬆弛( lu - ssor )格式進行了修正。
  16. The rails are affected by the skin effect for its large permeability and size. the track time constants are not constant due to the skin effect. for the calculation of the rails impedance, the method of equivalent cylindrical conductor is developed

    由於鐵軌很大的磁率和截面尺寸,致使其阻抗在電磁暫態過程中受到了集膚效應的影響,從而使得鐵軌的在暫態過程中並非是一個常
  17. On this basis, fortran program is written to solve temperature and velocity fields in transformer. by using this program we can calculate total flow, duct flow, mean temperature rise of transformer oil, oil time constant, mean oil temperature rise in each winding - coil, temperature distribution in each winding - coil, and stable / transient state temperature field. so this program has a great use value

    在此基礎上,我們編制了計算自然油向冷卻的具有餅式線圈變壓器流場和溫度場的fortran程序,程序可以對總油流量,進入各相、各油道的油流量,各線圈內的油流分佈,變壓器的油平均溫升,油的,各線圈的平均線油溫升,各線圈內的油溫分佈以及各線圈的穩態溫度場、暫態溫度場進行定量模擬,具有較強的實用價值。
  18. Seek the b ( t ) fieldwork curve and the time derivative curve dbz ( t ) / dt from the voltage decrease data generalized from field current that eliminating noise treated by wavelet ; 3

    由經過小波消噪處理過的野外歸一化的電壓衰減據求出b _ z ( t )實測曲線和它的時間導數曲線(
  19. Unfortunately for the center, recurring injuries and inconsistency on both ends of the floor decimated a large part of brown ' s season resulting in very pedestrian averages of eight points and six rebounds per game

    不幸的是,傷病重新襲來,加上球場兩端的矛盾消磨了他上賽季大部分致最後他的據只有場均8分6籃板。
  20. For an ev drive system, the variation of rotor time constant will bring on variation of torque and exorbitant line voltage even the field orientation may be destroyed. the varied torque will affect ev dynamic performance, and the higher voltage will limit the output power due to the bound of batteries in ev

    對于電動汽車驅動系統來說,轉子的波動會致輸出轉矩和電機電壓的波動,並且嚴重致系統出現振蕩,轉矩的波動會影響汽車的動態性能,電機電壓的波動則會由於電池電壓的限制而影響電機的輸出功率,這些都是電動汽車的驅動系統應該避免的問題。
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