瞬時有效度 的英文怎麼說

中文拼音 [shùnshíyǒuxiàodù]
瞬時有效度 英文
instantaneous availability
  • 瞬 : Ⅰ名詞（眼珠一動; 一眨眼） wink; twinkling Ⅱ動詞（眨眼） wink
  • 時 : 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...
  • 有 : 有副詞[書面語] （表示整數之外再加零數）: 30 有 5 thirty-five; 10 有 5年 fifteen years
  • 效 : Ⅰ名詞（效果; 功用） effect; efficiency; result Ⅱ動詞1 （仿效） imitate; follow the example of 2 ...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 有效 : effective; valid; efficacious
  1. 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。
  2. Flame tube in aircraft engine undergoes high temperature and high speed airflow washing. a hypothesis was suggested, which takes the transient heat transferring as the main reason to the cracking and damage on flame tube. finite element method was adopted to simulate the thermal fatigue and the hypothesis was reproduced

    發動機火焰筒的熱疲勞損傷是導致火焰筒失效的主要原因，本文提出了一種火焰筒熱疲勞損傷假設，認為火焰筒熱疲勞損傷不是由於發動機的運行和停車時冷熱溫度循環造成的，而是發動機啟動時瞬態溫度傳導過程中材料循環塑性變形的結果，利用該假設結合有限元計算模擬了火焰筒產生疲勞損傷的原因。
  3. Rational control of the pump ' s work and rest time is the key to solve the problem of void pumping. this essay gives theoretical analysis and cost comparison of every detective method, considers power detection as the most effective method, and puts forward several ways of power consumption and effectiveness power consumption at the same time. the designed electricity saving controller integrate all the above four methods, and it can work with different methods by switch between automatic and manual to broaden its accommodation

    解決油井空抽現象的關鍵是合理控制開機時間與停機時間長度，本文對各種檢測方法進行了理論分析及成本比較，認為功率檢測最行之有效，同時提出了功率檢測的幾種實現方法，即瞬時功率法、人工電耗法、設定功耗法及效益功耗法，所設計的節電控制器集以上四種方法於一身，可通過自動手動切換採取不同的功率檢測方法，使其適應范圍增寬。
  4. Secondly, the identification algorithms of road traffic status are studied including methods of determining floating car sample sizes which are based on “ the relationship between floating car sample sizes and accuracy of traffic information detection ” and “ the relationship between floating car sample sizes and requirement of road network information detection ”. the road traffic identification algorithm grounded on the journey - time is analyzed. besides, road traffic identification algorithm based on average speed is put forward and the validity of these two methods is analyzed in the thesis

    主要工作包括:從「浮動車數量與交通流信息檢測準確性關系」 、 「浮動車樣本數量與路網全方位信息檢測需求關系」兩方面對浮動車數量確定方法進行研究，給出了演算法模型;同時，分析了基於行程時間的道路交通判別演算法，提出了基於指數平滑法的平均瞬時速度道路交通判別演算法，並對兩種演算法的有效性進行分析比較。
  5. To detect transient signals under complex background, a novel method of aliasing - free exponential bilinear time - frequency distribution is presented in this paper, which can avoid the frequency aliasing and information loss existing in the traditional bilinear distributions, reduce the cross - terms effectively and possess high time - frequency resolution

    摘要針對復雜背景條件下瞬時信號的探測，提出一種新的無混疊雙線性時間頻率分佈方法，該方法能夠避免常用的雙線性時頻分佈中的頻率混疊與信息丟失，有效減小交叉項干擾，而且具有較高的時頻解析度。
  6. Considering the fuzziness of some boundary conditions enviroment media, and especially some loads in the engineering structure analysis, we go further into the computation based on the dynamic problem of fuzzy finite element ( ffe ), study further and systematically the analysis and solution. the principle of fuzzy minimum potential energy is established, and the balance equation of fuzzy finite element is reasoned by making fuzzy variation. at the same time, the dynamic balance equation of stochastic by making stochastic variation ， also the fuzzy stochastic dynamic balance equation is deduced. based the theory that the degree of the fuzziness and probability can be measured, in the other word, by using the concept of fuzzy entropy and entropy, pure fuzzy dynamic structure is given through transforming the probability to fuzziness. for the fuzzy parameter can be regarded as a fuzzy vector with dimensions, the structure ' s eigenvalue, by the theory of small parameter

    建立了模糊瞬時最小勢能原理，運用模糊變分原理導出了模糊有限元動力平衡方程；同時，利用隨機變分原理導出了動力問題的隨機有限元方程，同時得到了模糊隨機動力問題的有限元平衡方程。根據模糊度和概率度可以度量的原理，即利用模糊熵和概率熵的概念，把結構的隨機性等效地轉化為結構的模糊性，得到純粹模糊性的動力結構。把結構所具有的模糊參數看作一個維的模糊向量，利用小參數攝動原理，把結構的特徵值，特徵向量和位移都在模糊向量的均值處進行泰勒展開，得到一組遞歸方程，即可以求得結構的模糊特徵值，特徵向量和模糊位移。
  7. But indeed a good many of problem exist in the present situationof the management. according to this, this paper use the object of the borer. according to the reliability theory established the failure tree of borer system, calculated the reliability parameter of the system and every components. processed the instantaneous reliability analysis of the borer. received the eliability function of the components. based on this, established the maintain and management modeland ecnomye stimate model. and worked out the internet applications, improved the management efficiency of the employed facility, economized the devotion. the maintain and management of the borer achieved to the scientific and comunication, improved the management efficiency, possess great value of application

    針對這種情況，本文以石油鉆機為研究對象，利用可靠度理論，確立了石油鉆機的故障樹，計算了系統及各基本部件的可靠性參數，對鉆機系統進行了瞬時可靠度分析，同時，確定了石油鉆機系統的可靠度指標，得到了石油鉆機各基本部件的可靠度函數，根據可靠度函數建立了以可靠度為準則的維修管理及經濟評價模型，並編制了相應的應用軟體，提高了現場設備管理的效率，節約了經濟投入，使石油鉆機系統的維修管理達到了科學化、信息化的水平，提高了管理效率，具有較高的應用價值。
  8. The effect of initial static load on the instantaneous response makes the amplitude of vibration of horizontal and vertical displacement bigger than that without the effect

    初始靜力效應對結構瞬態響應的影響與剛度、質量、阻尼等因素有關，剛度越小，質量、阻尼越大時，初始靜力荷載效應對結構最大位移影響越小。
  9. The surface - wave theory was firstly provided by rayleigh, which can be used in even medium and many other learners developed rayleigh ' s theory and provided another theory which can be used in layered medium

    瞬態面波法的理論基礎是英國學者瑞利提出的半無限彈性均勻介質中的瑞利面波理論及其後來發展起來的半無限彈性層狀介質中的頻散理論，因其具有同時可以大范圍檢測，精度好、效率高等優點，在無損檢測方面有很好的前景。
  10. The data during launching weapon is analyzed transiently. this paper also adopt effective methods of the weighted average and the arithmetic means to the processing of the sampling data. at last, the measurement result illustrates the effectiveness of the method

    加權系數反映了各通道的靈敏度，對武器發射時瞬態沖擊進行了瞬態分析，對測量數據進行加權平均和算術平均處理，方法行之有效，最後給出測量結果。
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