近瞬時的 的英文怎麼說
中文拼音 [jìnshùnshíde]
近瞬時的
英文
near-prompt-
Once the water reaches its maximum speed, the valve slams shut and pressure is built up in the pump. this pressure forces open a second valve linked to the delivery pipe. when nullah water falls past the hydraulic ram, its momentum will lift a tenth of the water to a storage tank located near the esther li building photo 2
泵內有活門，當溪水在流動中受阻，會產生比正常壓力高十倍以上的瞬時水錘壓力，此時，泵內的另一活門會打開，把十分之一的溪水抽往設于李慧珍附近的儲水缸備用（圖二） 。During the instantaneous frequency estimation of lfm, there exists some error in the edge, so in the dissertation, a fitting method is proposed to modify it. from the computer simulation, the following result is obtained : for cw, the method based on cwt is most effective, and with the snr rising, the error curve of it is more and more closer to crb. for lfm, the method based on wvd gives the best result, and the effects of cwt and stft are similar for multi - component signal, compared to stft and wvd, cwt is a better choice
通過模擬發現，在單頻回波的瞬時頻率估計中，基於cwt的方法最為有效，隨著信噪比的提高，其均方誤差曲線越來越接近克拉美?羅界；在線性調頻回波的瞬時頻率估計中， wvd法得到的效果最好，而cwt與stft法的估計效果比較接近；在多分量信號的瞬時頻率估計中，相對于stft和wvd法， cwt法是一個更好的選擇。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。The defect of this method is that the virtual value will lag the instantaneous value about one cycle. this event result in the virtual value is not exact
這種方法的缺點是有效值的求取要滯后瞬時值將近一個周期，使得有效值的求取並不準確。Stationary phase method shows that by using information along the ridge defined by the phase on transformed domain, original signal could be represented and reconstructed
利用穩定位相法的近似公式分析可知，脊上分佈參數包含的信息與信號瞬時頻率變化規律密切相關，並且可以用來對信號進行重建。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。This dissertation contains the following parts : the extraction algorithm for instantaneous frequency of asymptotic signals based on wavelet ridge is proposed in this dissertation, and the asymptotic estimation method for wavelet transform of asymptotic signals is deeply studied
本論文主要做了以下工作：提出了基於小波脊線的漸近信號瞬時頻率提取演算法，並研究了漸近信號小波變換的漸近估計方法。Based on systematical study of each constituent of iss, the foundation, computation and precision analysis of the models of geoid, sea surface topography, mean sea surface and ocean tide are mainly discussed ; the conceive of mean sea surface height model and ocean tidal model suitable to chinese near sea and its neighborhood is provided ; two kinds of iss model are derived out
本文在系統研究瞬時海面高各組成要素的基礎上，主要討論了大地水準面模型、海面地形模型、平均海平面模型和海洋潮汐模型的建立、計算以及精度評價等問題；提出了建立適於我國近海及鄰域平均海平面模型和海洋潮汐模型的設想；綜合得出了兩種瞬時海面高模型，並進行了精度估計，編制了相應的軟體。In the past, the research on queueing system had mostly focused on stability and distribution, that is, the common ergodicity. while recently, the institute of probability and statistics in central south university has undergone a systematic research on the instantaneous distribution and all kinds of ergodicity
以前排隊論多是研究排隊過程的平穩分佈，即研究普通遍歷性，最近，中南大學概率論與數理統計研究所對排隊過程的瞬時分佈和各種遍歷性進行系統研究，本文在此基礎上，對m g 1和gi gi 1排隊進行了處理，得到了如下一些結果。An on - line minimum - variance estimator was developed for thrust acceleration applied to orbit transfer using discrete - time radar measurements. the mass - flow - rate of propellant was selected as a state variant, which was estimated by employing an integral state model and ekf filter. the variation equations for measurement vector to mass - flow - rate have been established to linearize the discrete - time measurement equations. the algorithm has applied successfully to maneuver process in commanding satellite into geo - stationary orbit. the results show that the algorithm developed here can monitor and determine whether engine works well or failure precisely and quickly during orbit transfer process
飛行器軌道機動過程中，為跟蹤、定位機動目標和干預機動控制過程，需要統計處理離散的雷達觀測量實時估計推進發動機的推力，進而確定飛行器的瞬時軌道參數.本文所述演算法是該工程問題的探討和解決方案.文章建立了軌道機動過程中連續變質量運動模型和離散雷達量測模型，推進發動機的質量秒耗量作為表徵推力加速度的一個近似常量，應用擴展卡爾曼濾波對離散的雷達測量數據進行順序統計處理給出秒耗量的最小方差估計;文章詳細地推導了線性化量測模型的變分方程和觀測矩陣;模擬結果表明該演算法能快速、準確地估計推進發動機的質量秒耗量和向機動目標施加的實際推力A predigested car model and a reasonable bridge model were presented after the bridge structures and the colliding characters were analyzed. the stress and the displacement of the concrete, bar, pre - stress bar changing with time were presented. the stress of the whole bridge at the time of the contact and the deformation of the whole bridge at the end of the contact are obtained
採用美國ansys公司的有限元軟體ansys ls - dyna對碰撞過程進行數值模擬分析，得到了撞擊點附近混凝土、普通鋼筋以及預應力鋼筋的應力及位移隨時間的變化規律，同時得到了全橋在碰撞后瞬間的應力分佈規律和碰撞結束前全橋的變形規律。S listened with admiring attention to all he said ; some of his remarks corresponded with what he already knew, or applied to the sort of knowledge his nautical life had enabled him to acquire. a part of the good abb s words, however, were wholly incomprehensible to him ; but, like the aurora which guides the navigator in northern latitudes, opened new vistas to the inquiring mind of the listener, and gave fantastic glimpses of new horizons, enabling him justly to estimate the delight an intellectual mind would have in following one so richly gifted as faria along the heights of truth, where he was so much at home
他所說的有些話和他已經知道的事相符的，和他從航海生活中所得來的知識相一致的當然，有些是他所不知道的事情，但就象那黎明時的北風給在赤道附近航行的航海者以指示一樣，這些話給他這孜孜求教的聽者打開了新的眼界，猶如流星一般一瞬間照亮了新天地。In accordance with the mr damper - spring system presented in this paper and non - linear fem model of guyed mast, an " off - on energy dissipation " semi - control strategy based upon mr damper ' s displacement is proposed, in which the control force of mr damper is close to the instantaneous optimal active control force and dissipate energy as possible as it can
根據本文提出的mr阻尼器?彈簧系統和桅桿結構非線性計算模型，文中提出了使mr阻尼器所提供的控制力盡量接近瞬時最優主動控制力，同時又能盡量耗能的mr阻尼器對桅桿結構風振響應半主動控制基於阻尼器位移的「開關?耗能」半主動控制策略，並在時域內進行了模擬分析。In this work, incident super - gaussian pulse propagation in conventional single - mode fibers has been investigated in detail after taking into account the fiber chromatic dispersion. the results show that for an incident super - gaussian pulse with steep leading and trailing edges, its shape undergoes a variation from near - rectangular, two - peak, and finally to single - peak. in the meantime, its peak intensity increases at first, after passing a maximum, and finally decreases monotonously
數值模擬的結果表明:超高斯入射光脈沖在光纖中傳輸時脈沖波形、瞬時惆啾、以及峰值強度的演變規律與高斯入射脈沖不同，脈沖波形不再總保持單峰結構，通常將經歷一個從近平頂、多峰、最後到單峰的演變過程;從脈沖的前沿到后沿，瞬時明啾也不再為線性，而是具有多個極值;峰值強度隨傳輸距離的變化趨勢也不再為一單調遞減，而是先增加后減小。( 8 ) for the sake of overcoming the shortage of the former work, axisymetrical analytical solutions of vacuum combined surcharge preloading were deduced, the effect of surcharge loading speed was considered and vacuum was regard as instantaneous load, so we can take account of effect of surcharge loading time, well resistance and smear, it is more closed to practical engineering
（ 8 ）根據以前真空-堆載聯合預壓解析解的不足之處，推導了真空-堆載聯合預壓下地基孔壓及固結度的解析解。本文的解析解將真空荷載視為瞬時施加，而將堆載荷載的施加考慮為線性施加過程，因此可以考慮堆載施加的時間影響，與實際工程情況更摘要加接近，並可同時考慮井阻、塗抹的影響。Instantaneous companding circuit, namely, log - domain circuit, is the key technique used by international academia to develop the low - voltage and low - power analog vlsi in recent years
瞬時縮展電路又稱對數域電路，是近些年來國際學術界用來發展低電壓低功率模擬vlsi的一個重要關鍵技術。Thirdly, a calculation formula of distortion settlement is established by considering soil structure damage and plastic drain board restraining displacement of soft foundation. starting with discussing the main factors affecting settlement of consolidated foundation, a reasonable method to modify the calculated settlement of soft foundation by layer - wise summation method is presented here. with calculable coefficients of volume deformation, lateral displacement and structure damage to modify the settlement will be closed to measurer settlement
（ ）在土體損傷理論的基礎上建立了考慮結構損傷、排水板加筋作用的瞬時沉降計算公式，分析了影響土體沉降的主要因素，提出了對按單向分層總和法計算的固結沉降量進行體積應變、側向位移、土體結構損傷三項修正的方法，以上述三個修正系數取代原來單一的綜合經驗系數，使沉降計算值與實測值更接近。Compared to heat transfer in the external region of borehole, mass and heat capacity of materials inside the borehole are insignificant and negligible. thus, heat transfer inside the borehole is approximated as steady - state heat transfer except for analyses of short times ( a few hours )
與鉆孔周圍區域傳熱過程相比，由於鉆孔內材料的熱容量較小，因此除了討論短時間（數小時）的瞬變傳熱問題以外，可以忽略鉆孔內材料的熱容量，把該部分的傳熱近似作為穩態傳熱處理。Depending on how a counter is defined, its value might be the most recent aspect of resource utilization, also called the instantaneous value, or it might be the average of the last two measurements over the period of time between samples
根據計數器定義方式的不同，它的值可能反映的是最近的資源利用情況，又稱「瞬時值」 ，也可能是上兩次度量值在兩次樣本之間的那段時間內的平均值。This system has very little even zero damping when stage starting ; and then the damping becomes very strong when the stage is close to the positioning place
該可變阻尼系統在平臺啟動時阻尼很小或為零，而當平臺接近定位位置的瞬時阻尼很大。分享友人