瞬時作用 的英文怎麼說
中文拼音 [shùnshízuòyòng]
瞬時作用
英文
instantaneous action-
Fluid noise mainly comes from out put pulsation of rate of flow, the main reason of out put pulsation of rate of flow is the instant high pressure return flow that obturation cubage produced when the big round curve pressure transition. the v trough on the port plate can reduce the fluid noise. in this paper, the author based on the acting of dam a river and condensability of liquid and used matlab language as tool to calculate the v trough on the original port plate and drew out the p - t diagrammatic curve and analyzed its shortcoming and improved the design of original v trough and got that the best size of its angle was 12. 3 and its length was 5mm and the cross section was an equilateral triangle
流體噪聲主要來源於輸出流量脈動，造成輸出流量脈動的主要原因是閉死容積在大圓弧段壓力切換時產生的瞬時高壓迴流，在配流盤上開設v型尖槽可降低因高壓迴流而引起的流體噪聲，本文以截流作用和液體的可壓縮性為理論依據，以matlab語言為工具，對原配流盤上的v型尖槽進行了理論計算，繪制出p - t圖線，分析了它的不足，並對原有v型尖槽進行了優化設計，得出了v型尖槽的最佳幾何尺寸：配流盤平面上的v型尖槽的兩邊的夾角為12 . 3 ，槽長5mm ，槽的橫截面為等邊三角形。At last, the conclusions of the whole thesis are drawn, and it is put forward that the future research emphases on the infrared radiation absorption ct technology should focus on : instantly get the absorption projections are the crucial factor to utilize the technology industrially ; on the basis of the hypothesis that the gas is ideal gas, species concentration of particular gas medium can be measured at the same time, which must be helpful to comprehend combustion essence ; if laser source to replaces blackbody stove, for irradiant flame, interferometric projection can be attained, and its temperature distribution will known
最後，對全文進行了總結，並指出今後研究工作重點。指出：瞬時得到各方向的投影是此技術實用化關鍵；在獲得溫度分佈信息基礎上，進行必要的假設和推導，能同時得到火焰中某特定組分濃度的分佈，這必將進一步我們對燃燒本質的理解；利用方向性好，輻射強度高的激光源代替常規的黑體爐，能得到輻射干涉投影圖像，這樣就能測量所介紹系統不能測量的發光火焰溫度分佈。The latest hydrotherapy moistens the fomulation, repressing to have permanent wave effectively the enemy opponent hair results in the disservice, the paraquinones is naturally or the hair of nature book can rise to pull the straight action in a twinkling, can provide the ample nutrient for the hair quality at the same time with the of aqua, the deep lay moistens the hair silk, making cutin fast to come together, perpendicular nature, complement nourishment, bear heat, make very hot show behind the hair even shows a health follows to keep, float the moving
最新水療滋潤配方，有效抑制燙發時對頭發造成傷害，對天生或自然卷的頭發能起到瞬間拉直的作用，同時能為發質提供充足養份和水份，深層滋潤發絲，使角質快速聚合，垂直自然，補充營養、耐高溫，令燙后秀發更顯行健康順直、飄逸動人。As it was, he saw gallingly, the incident would be rolled into the horst family annals, as a pivotal and eternally ramifying moment ? the time mommy ( and, as she would become, grammy ) was stung by a bee, and funny foreign - born grampa resourcefully saved her
現在事情到了這一步，他難堪地看到：這件事將作為極度關鍵永遠起轉折點作用的瞬間而載入霍斯特的家族史? ?媽咪（或者說，奶奶，她反正要當奶奶的）被蜂蟄時，模樣滑稽出生於外國的爺爺多麼機智地救了她。The equations of motion governing the axisymmetric elastic deformation of finite orthotropic cylindrical shells, involving the effect of transverse shear and rotational inertia, are derived. by applying the reverberation method, the displacement and the resultant forces of the shell in the phase space are expressed. then the transient waves in the finite orthotropic cylindrical shell subjected to the axisymmetric impact are obtained by using inverse laplace transforms. furthermore, the transient solutions are decomposed to the generalized ray integrals and computed numerically
分析了計及剪切變形和轉動慣性的有限長正交異性圓柱殼中彈性瞬態波的傳播問題，採用回傳矩陣法，在相空間中給出了位移和內力的表達式。再利用laplace逆變換，得到正交異性圓柱殼受軸對稱沖擊作用時彈性瞬態波解，然後將其分解為若干廣義射線積分之和，並用數值方法求解之。Due to the short distance among the planes which fly in a group, the conventional low resolution radar can not distinguish them in both distance and azimuth ? if we use the technology of isar to resolve the difference among doppler frequency of the targets and obtain a fine resolution cross - cross image, we may separate them, but a long time of coherent processing is needed <, for the formation targets, it can be approximately divided to rigid body and nonrigid body, so for the formation targets, that can be regarded as rigid which has a relative position and an identical movement, can be approximately considered as a large target, and be compensated by translational phase with the rule of minimum entropy, but for the most those cannot accord with the approximation of rigid, being the doppler - frequency of the aim is linear changed, by the relax method with short data, increases the resolving performance of multiple target to the aim in the frequency domain, since cross - range resolution is based on the accumulative time, so it is greatly improve the resolution to formation targets by the instant cross - range image which produced by radon - wigner transformation
低分辨isan成像及干涉技術應用研究一因此直接無法分辨編隊目標的架數，我們借鑒isar的技術，通過較長時間的相干積累，在多普勒頻域上對目標進行分辨。而對于編隊目標，可分為近似剛性的多目標和非剛性的多目標，所以對于可以近似為剛體的編隊目標相對位置固定，運動方式一致，可以近似看作一個大目標，採用最小墑準則對平動相位的進行補償，但是大多數並不滿足剛體近似的編隊目標，由於目標在相干積累時間的多普勒頻率近似呈線性變化，通過對較短數據利用relax的時頻分析方法，提高了頻率域上目標分辨的性能。由於橫向解析度取塊于橫向積累時間，所以利用radnwigner變換得到瞬時的一維橫向距離像大大提高了對編隊目標的分辨，對模擬和實測數據的大量分析結果表明此方法的有效性和可行。Based on output voltage and capacitor - current feedback current spwm control, the inverter is modeled and the prototype is made
並對採用輸出電壓和電容電流瞬時值反饋的電流spwm控制技術逆變器建立了模擬模型，製作了原理樣機。The beam - on - dynamic - winkler - foundation ( bdwf ) model was utilized to determine the lateral dynamic response of a pile with finite length in a viscoelastic soil. an analytical solution was obtained in the time domain for the vibration of a pile under a laterally cyclic force applied at the pile head. based on the solution, the transient response of the pile loaded by semi - sine force was acquired with superposition principle
首先，基於動力winkler模型（ bdwf ）對粘彈性地基中有限長樁的水平動力響應問題進行求解，得到了單樁在樁頂受水平簡諧荷載作用下的時域解析解，並在此基礎上通過疊加原理得到了半正弦激振條件下的瞬態解析解。Linear induction motor is an important kind of machines which have some merits such as simple structure, low cost, durability, convenience for maintenance etc. the subject of this thesis is to study a big circular ring linear induction motor, and the major works in this thesis are summarized as follows : ( 1 ) considering the effects of the finite length of primary core, one - dimension analytical solution for the air gap field is cited in this paper. based on it, the single layer winding magnetic field is studied. considering whole - pitched and short - pitched winding configuration with odd poles and half - fulled slots in both ends, the double - layer winding magnetic field is analyzed, respectively
本文對大圓環直線感應電機進行了深入細致研究，內容包括： （ 1 ）本文採用有限長行波面電流作用於有限長鐵芯上的模型，引用了氣隙磁場一維解，研究了單層繞組磁場，奇數極半填槽雙層繞組在採用整距和短距時磁場的分析、比較，簡單介紹了二維解； （ 2 ）用有限元軟體ansoft對大圓環直線感應電機空載氣隙磁場進行了靜態分析，並分析了結果； （ 3 ）用軟體進行了額定電壓下的瞬態分析，得到了轉矩，位移，轉速隨時間變化曲線圖，利用單極性霍爾元件測定轉速並與軟體計算結果進行了比較，採用等效電路法計算了堵轉時的最大電磁力並做實驗進行了驗證，由實驗測得了三相電流波形，並與計算結果進行了比較，對其不對稱性進行了定性分析。The expression efficiency difference between ped5 and pcdhfrl, a vector utilizing cmv enhancer / promoter ( pcmv - ie ) for foreign protein production, was analyzed using human interferon - p ( ifn - ) gene and human secreted alkaline phosphatase ( seap ) gene as reporters. when analyzed in transient expression, ped5 showed a little more protein produciton than pcdhfrl. however, in continuous expression, when serum concentration was lessened to slow down cell proliferation, ped5 expressed 3. 1 times more reporter proteins than pcdhfrl, which implied that pef - io was less affected by cell cycle status in contrast to pcmv - ie, making ped5 a good expression vector for foreign protein production
應用人-干擾素（ ifn - ）和人分泌型堿性磷酸酶（ seap ）基因作為報告基因，對含有巨細胞病毒即早期啟動子（ p _ （ cmv - ie ） ）的表達載體pcdhfr1和ped5表達外源蛋白的能力進行了比較，發現對于瞬時表達， ped5略好於pcdhfr1 ；在穩定表達中，通過降低血清濃度，使細胞增殖緩慢，這時ped5表達外源蛋白的能力較pcdhfr1高3 . 1倍。The safety of transmission line plays a important role in power system safety it is not only the requirement of ensure supply power reliability, but also the necessary precondition of enhance power system stabilization, to remove faulty line quickly and accurately, also keep non - faulty line continuous work when some transmission line faults current differential protection is a kind of simple, reliable and good - selective protection manner to any variety of transmission lines, power system development needs current differential protection apply to transmission lines, moreover the advancement of electric and communication technology enable current differential protection apply to transmission lines firstly, the paper discusses, analyses the research and application transmission line protection in detail, compare the principle and realistic presupposition of general line pilot protections secondly, because conventional current vector differential protection are influenced easily by load current and transitional resistance, in order to at the same time quicken protection act, the principle and criterion include work characteristic of differential protect based on fault component sampled values are studied, results shows that differential protect based on fault component sampled values excels general vector current differential protection in reliability, sensitivity and anti - saturation of current transformer in addition, synchronous current sampling methods at all terminals of line is analyzed and estimated lastly, the principle and criterion. also device design about current sampling values differential protection based on optical fiber communication, which apply to short transmission lines are concretely investigated,
基於基爾霍夫定律的電流差動保護無論對於何種形式的輸電線路都是一種簡單、可靠、選擇性強的保護形式，電力系統的發展使得電流差動保護應用於線路保護成為需要，而電子、通信技術的發展使得電流差動保護應用於輸電線路成為可能。首先，本文對目前線路保護的研究和實際應用情況進行了討論和分析，比較了常用線路縱聯保護的實現原理和實現條件及優缺點。其次，針對常規相量電流差動保護易受正常負荷電流和故障過渡電阻影響的缺點，同時為加快差動保護的動作速度，對基於故障分量瞬時采樣值電流差動保護的原理、判據、動作特性等作了討論和分析，結果表明基於故障分量瞬時采樣值電流差動保護在可靠性、靈敏度、抗電流互感器飽和方面明顯優于常規相量電流差動保護，對電流差動保護各端的同步采樣方法和數據通信也進行了分析和評價。The working principle of liquid helium cryocondensation pump is strong absorptive force between 4. 2k cryogenic surface and gas molecules. the pump has great advantage in large instant pumping speed under high gas load, large working pressure range, high & neat ultimate vacuum
利用4 . 2k低溫面對氣體的物理吸附機制實現高氣載下瞬時大抽速的液氦低溫冷凝泵，具有工作壓強范圍寬、能獲得清潔真空環境的特點。First, the dynamic stability of braid composite cylindrical shells with the influences of some main factors is introduced. the general governing equations for the nonlinear dynamic stability is obtained. by the hamilton principle. the creep buckling analysis of braid composite cylindrical shells under axial compression and the dynamic stability under nonconservation force are discussed as emphases. in creep buckling question, by means of theoretical analysis, the instaneous critical load and durable critical load of viscoelastic braid composite cylindrical shell under axial compression are obtained and the numerical example is given
首先介紹了編織復合材料圓柱殼在幾種主要因素影響下的動力穩定性問題，用hamilton原理建立非線性動力穩定性問題的一般性基本方程。然後重點討論了編織復合材料圓柱殼軸壓下的蠕變屈曲問題及非保守力作用下的屈曲問題。對蠕變屈曲問題，通過理論分析來得到了編織復合材料圓柱殼的瞬時彈性臨界載荷和持久臨界載荷，給出了具體的算例。The improvement to internal ballistic calculation precision of solid rocket motor ( srm ) is important to capture target of missile. and to accomplish it ' s task. calculation of burning surface of propellant grain is essential to interinal ballistic performance calculation
提高固體火箭發動機內彈道的計算精度對導彈準確捕獲目標、完成任務有著重要的作用，而發動機工作時瞬態燃面計算是內彈道性能計算的基礎。According to the theory analysis and engineering practice, the application of natural vibration features in bridge inspection is introduced. during the transient dynamic analysis of pubugou cfst arch bridge, the time history responses of the structure under uniform velocity moving load and impact load are analyzed, and the amplification coefficients of deflection and internal forces of the structure are intensively analyzed
在瀑布溝大橋的瞬態動力分析中，模擬分析了當移動荷載以不同速度通過橋面時的時間歷程動力響應以及在沖擊荷載作用下橋跨結構的時間歷程動力響應，並對橋跨結構在移動荷載和沖擊荷載作用下的動力放大系數作了較為詳細的分析。The control tactics of space voltage vector are investigated, and the simplified algorithm which judges the sector location of reference vector and calculates switch operation time is put forward. by analyzing the current hysteresis control, the relation between switch frequency, and hysteresis bandwidth and input inductance of pwm rectifier is deduced. by applying instantaneous power theory, the principle of pwm rectifier power control is analyzed, and the direct power control by matlab toolbox through estimating active power and reactive power with virtual flux is realized, and the simulation results prove that it is correct
對常用空間電壓矢量控制策略進行分析，提出了給定參考矢量所在區間判斷的簡化方法，以及電壓矢量作用時間的求取方法；分析了電流滯環控制策略，推導出開關頻率與滯環帶寬以及整流器輸入電感之間的關系；應用瞬時功率理論分析pwm整流器功率控制原理，通過虛擬磁鏈估計有功功率和無功功率，用matlab實現了直接功率控制，並驗證了該控制方法的正確性。The tripping device is basically divided into the instantaneous electromagnetic release and the time delay thermal release, which are used for protection of circuit from shortcircuit and overload respectively
斷路器由瞬時動作的電磁脫扣器和延時動作的熱脫扣器組成，分別用作線路的短路和過載保護。The emulational calculating theories of traction power supply system ' s operating charts combine with actual things of engineering design at present in chapter three, to set up traction web current distributing mathematical model, integral distributing mathematical model, locomotive distribution and obtaining current model at every moment, and on which making use of mathematical planning methods to set up mathematical models is based at every moment in every instance interval of the railroads. for instance, instantaneous current, instantaneous voltage descent and effective current, main changing capacity and so on, in addition, there are the minimum power shortage model, the optimal transformer substation location, the least engineering expenditure, the optimal mathematical model of traction power supply system. optimize design ' s algorithm of traction power supply system is introduced in detail in chapter four, where programming idea and realizing method of the computer software are given an explanation
本研究主要進行了以下工作：結合牽引供電系統運行圖的模擬原理和現行工程設計的實際情況，建立了牽引網電流分佈、積分分佈、任一時刻機車分佈和取流的數學模型；應用數學規劃方法建立了任一距離區間、任一時刻的瞬時電流、瞬時電壓降數學模型和有效電流、主變容量和主變壓降、最小功率損失、最佳變電所容量、最佳變電所位置、最少工程費用、最少運營維護費用和牽引供電系統方案最優等方面的數學模型；闡明了牽引供電系統優化設計的演算法和計算機軟體編程思想及實現方法；進行了工程實例計算；最後，對牽引供電系統優化設計技術應用進行了總結。( 4 ) the intelligent inspect system for roof latticed truss structure in shenzhen citizen center is selected as a practice background, and the intelligent inspect method to the steel bracket of roof truss is researched in present paper, in which includes several tasks as follows : automatic load identification for bracket based on neural network method, prompt calculation for the stress of key points on bracket, and its service status evaluation and stress alarm
（ 4 ）以深圳市市民中心屋頂網架結構的智能監測系統為實際應用背景，詳細介紹了網架結構支撐鋼牛腿的智能化監測方法。其中包括，基於神經網路的牛腿瞬時荷載的自動識別、牛腿關鍵點應力的快速正向計算、以及關鍵點工作狀態的評估與報警。Positive electrode and negative electrode that execute spanning crack prevention are simulated as the source point and merged point, so the temperature field owing to the concentration of current around the crack tip is educed at the moment when the current is switch on
將實施跨越止裂時的正、負電極比擬為電流場中的源和匯，從而導出了在瞬間電流作用下，裂紋尖端附近區域因繞流而形成的溫度場。分享友人