比聲阻 的英文怎麼說
中文拼音 [bǐshēngzǔ]
比聲阻
英文
specific acoustic resistance-
The le - an oil field is located on the southern slope of dong - ying sag. there are two sets of ek basalt in its western block. depending on the drilling, the logging and the seismic date, tha ek basalt has the characteristics of high resistancs, the low sound wave defferance and faradic conductance, the smooth curve of self potential
樂安油田位於東營窪陷南斜坡上，其西區發育了兩套孔店組玄武巖，根據鉆井、測井、地震資料，孔店組玄武巖具有電阻率高、聲波時差值和感應電導率值低、自然電位曲線平直的特點，地震波呈板狀強反射；沉積期該區有有二次火山活動，玄武巖平面分佈比較穩定，噴發方式為「裂隙式噴溢」 ，火山口分別位於草12和草31井附近。Secondly, compared with some other kinds of comparator structure and based on the preamplifier - latch fast - compare theory, a novel topology of cmos preamplifier latch comparator circuit is presented. considering trade - off between kickback noise and power dissipation, reference resistance value is optimized. according to the encode demands of different stage resolution, clock - control encode circuit is designed
其後，在具體的子adc設計中，對比各比較器類型的優缺點，並基於預放大鎖存快速比較理論，提出一種新型高速低功耗預放大鎖存比較器電路拓撲;根據adc系統所允許的參考電壓最大波動限制，在回饋噪聲對輸入參考電平的影響和功耗之間折衷，確定優化的參考電阻串阻值;根據不同級精度的編碼要求，設計出時鐘控制編碼電路。Lagrange wave speed in the release process was computed from the measurement, and result shows a good agreement with the data in literature. furthermore from the lagrange wave speed, the stress - strain relationship in the release process was calculated using the impedance match solution. comparison of the stress - strain with the fluid elastic - plastic model indicates that ofhc copper exhibits a clear work - harden behavior during the release
根據界面粒子速度剖面，計算得到了卸載過程中lagrange聲速隨界面粒子速度變化的關系，所得結果與文獻給出的數據符合很好；其次，利用阻抗匹配近似，計算分析了無氧銅卸載過程的應力-應變關系，並與流體彈塑性模型進行了比較，結果表明：無氧銅的卸載過程存在明顯的應變硬化效應。The mutual coupling between elements is expressed in terms of the normalized impedance matrix of the uniform linear array, the concise expressions for the optimized weight of the lms algorithm and the signal - to - interference - plus - noise ratio are given. the effect of mutual coupling on the performance of the sinr is illustrated with two examples, a method for compensating the mutual coupling is present, the compensation effect of this method is verified by example
用譜分析法，把陣元問的互耦用陣列的歸一化阻抗矩陣來描述，推導了均勻線陣的最佳權矢量及信號干擾噪聲比的表達式，模擬計算了互耦對自適應天線陣列的信號干擾噪聲比的影響，給出了一種校正互耦的方法，數值模擬了校正的效果。But to circular plate with large surface area, the vibrate modes generated is often so high that there is reverse phases existing, which result in a decrease in radiation impedance, electric - acoustic efficiency and the electric power, as well as poor directivity
然而對于輻射面積較大的彎曲振動圓盤，一般激勵的振動階數比較高，因此存在彎曲振動的反相區，導致換能器的輻射阻抗下降，電聲效率和聲功率降低以及指向性變差等問題。Monkeys on yakushima island have an accent with a higher tone because tall trees on the island tend to block their voice, masataka said
認為，島上生長的高大樹木阻擋了聲音的傳播，使得猴子不得不提高調門。因此，島上猴子的聲調要比大平山的猴子的聲調高一些。We did some analysis about the relativity between the vibration and the noise of the wheel. after the testing of the first line of guangzhou underground, we found that the existing wheel damper has nothing to do with the noise of wheel less than four thousands hz. compared of different contributions of the tread vibration and the web vibration on sound level of railway noise
在實驗過程中，改進了對車輪的激振方式，利用單擺激振提高了激振力的精度;實驗分析了車輪阻尼器的結構、安裝方式及其動力學參數對車輪阻尼器降噪效果的影響;也分析了車輪振動與噪聲的相關性;現場測試廣州地鐵一號線的噪聲特性，確定了車輪阻尼器所要控制的頻率范圍;對比分析不同激振情況下，踏面徑向振動與輻板軸向振動對噪聲聲壓級的貢獻比例。After briefly describing the damage mechanism of electromigration, noises theories and signal processing methods, many kinds of experimental assessing methods of electromigration, such as the traditional mtf test, the test of changes of resistance and noise measurement, etc., are reviewed in this paper, and its research on the technology of noises detection has been studied emphatically
本論文在簡要介紹電遷移失效機理、噪聲理論和1 / f信號表徵方法的基礎上，對各種電遷移可靠性實驗評估方法（傳統的壽命測試法、電阻變化測量法、噪聲測量法）的特點作了分析對比。重點研究了vlsi金屬互連電遷移噪聲檢測技術。The conclusions are drawn by analysis : the sound insulation performance of structure is improved by using flexible viscoelastic materials ; otherwise it is complicated to sound insulation for incidence angles and the thickness of materials ; for multi - layered compound structure, it is important to choose flexible viscoelastic materials as external rubber, which can gain good insulative effect
分析表明：軟質阻尼材料能明顯改善結構的隔聲性能；相對來說入射角度和材料的厚度對隔聲性能的影響比較復雜；而對于多層復合結構而言，面層橡膠的選取尤為重要，一般採用軟質橡膠材料來得到大的隔聲量。Earbuds are thought to be less effective than earphones in blocking out foreign noises
對于阻擋外界的噪聲耳塞比耳麥的效果差。The analytical mode is based on the theory of sound propagation in layered media. the concept of equivalent parameters is established. the absorption of sound energy by damping layer ' s is represented by use of complex sound impedance
解析模型以分層介質中的波動理論為基礎，建立了等效參數的概念，並運用聲阻抗的復數表示法把阻尼層對介質層聲能吸收的影響都考慮進去，通過比較敷設消聲覆蓋層前後多層傳遞損失的差異來獲得消聲層的效率。The focus, field of view and transmissivity of the optical system of the receiver are analyzed. a high - speed transimpedance amplifier circuit is designed with optimized noise. through the noise model
設計了一種噪聲優化的高速跨阻前置放大電路，根據跨阻放大電路的噪聲模型詳細分析了輸出噪聲電壓、信噪比和信號動態范圍。The experiment model that scale is 1 to 2. 5 was made. model experiment results show that numerical simulation scheme has gratifying precision and is very effective for forecast of resistance characteristics of marine exhaust mufflers
按照所確定的結構製作了幾何比為1 ： 2 . 5的實驗模型，模型實驗結果表明，本文的數值模擬方案具有令人滿意的精度，對于船用排氣消聲器阻力特性預估是非常有效的。Acoustics - determination of sound absorption coefficient and impedance in impedance tubes - method using standing wave ratio
聲學.阻抗管中吸音率和阻抗的測定.駐波比率法Acoustics - determination of sound absorption coefficient and impedance in impedance tubes - part 1 : method using standing wave ratio
聲學.阻抗管中吸聲系數和阻抗測定.第1部分:駐波比率法( 3 ) introducing the proportional damping, the finite element formula of structural - acoustic coupled system lined with sound absorbing materials is obtained. mode - superposition technique for modal frequency response analysis of coupled structure - acoustic systems is also used to deal with the sensitivities of the eigenvalues and eigenvectors of coupled systems for the purpose of reducing cavity interior noise in theory
討論了阻尼降噪問題，建立了有阻尼聲振耦合系統的有限元模型，採用振型疊加法，將系統位移轉換到以固有振型為基向量，進行結構壁面有吸聲材料的聲振耦合系統響應的有限元分析與靈敏度分析，推導了比例阻尼條件的靈敏度計算公式。The mechanical impedance analyzing method utilized, the mathematical formula for the input impedance and transformer ratio of ultrasonic horn are built up, some vibration performance of ultrasonic horns are discussed under different load impedance, the relationship and applicational conditions between the transformer ratio of ultrasonic horn and the radiational impedance are analyzed
採用機械阻抗分析方法，建立了超聲變幅器的輸入阻抗和變幅比的數學表達式，討論了不同負載阻抗下超聲變幅器的振動性能，分析了超聲變幅器的變幅比與換能器輻射阻抗之間的關系及應用條件。As a kind of new configuration waveriders have high lift to drag ratio ( l / d ) in hypersonic flight, which makes the study of waverider shapes an important trend of hypersonic air vehicles development
乘波構形在高超聲速條件下的高陞阻比優勢備受關注，使得對於它的設計研究成為高超聲速飛行器外形設計的一個重要方向。The results show that the diffuser has such advantages as larger induction ratio, low resistance and noise, relatively even air supply, no condensation, simple in structure and low in costs
測試結果表明，該風口的誘導比大，阻力小，噪聲低，送風比較均勻，風口沒有結露現象，結構簡單，造價低。First, it is associated with the prepared conditions of spectral pure graphite electrode ; second, compared with the untreated graphite, the surface functional groups of ? oh and ? cooh on the treated one increased dramatically with hot concentrated h2so4 and the impurities on electrode surface decreased significantly with ultrasonic rinse. a sequence reaction mechanism was proposed for the eis of mn ( ) / mn ( ) on different graphite electrodes. the spectral graphite and the treated one can be suitable for the inert electrode of mn ( ) / mn ( ) cathode
分析原因認為：一方面與光譜純石墨電極的制備條件有關；另一方面，與未處理石墨電極相比，處理石墨表面含氧官能團? oh 、 ? cooh明顯增多，而且超聲清洗又使其表面雜質含量減少，並提出了一個反應機理解釋mn （ iii ） / mn （ ii ）電對在三種石墨電極上阻抗譜的不同，說明光譜純石墨和處理石墨均可以作為mn （ iii ） / mn （ ii ）正極電對的惰性工作電極。分享友人