瞬時傳沖 的英文怎麼說
中文拼音 [shùnshízhuànchōng]
瞬時傳沖
英文
instantaneous impulse-
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。Refer to the impacting - echo technology, we impacted the apex of the steel bar and incepted the reflecting stress ave through the resonator that fixed on the apex of the steel bar, and the value of the consolidating wave speed was calculated based on the time of stress wave transmitted and the length of the steel bar, so, identifying the reflecting signal is the key of the consolidating wave speed method
借鑒于沖擊回波技術，固結波速的測定方法是在鋼筋測桿的出露端施加瞬態沖擊載荷，由安設在測桿頂端的傳感器接收反射應力波信號，根據應力波的走時和測桿的長度折算固結波速的大小，因此反射信號的識別是固結波速法檢測混凝土強度的技術關鍵。The principle of vibrator is to introduce scattered energy to underground in a comparatively long time, and collect the energy through correlation and compress it into a narrow pulse. the portable high - frequency vibrator system, developed by key lab of geo - exploration and instrumentation ( jilin univ ), ministry of education, generates chirp signal and accumulates energy through a long - time bestiring. according to the characteristics of vibrator, the seismic recorder that operates on - line with vibrator must have these functions as follow : first, it must have the ability of recording a great quantity of data. second, it must have assistant channels to sample reference signal. third, it must have the function of data correlation in real - time
可控震源利用可控的小能量、長時間激發波來實現沖擊震源瞬時產生的大能量激發波。在利用可控震源進行地震勘探時，要求地震儀長時間記錄地震信號，這對地震儀的采樣長度提出了很高的要求。受存儲量和數據傳輸速度的限制，絕大多數地震儀很難對如此大的數據量進行記錄，同時，可控震源要求地震儀有兩個輔助通道並且具有數據相關功能，目前國內還沒有出現滿足要求的地震儀產品。In this dissertation, the mathematic model of optically controlled phased linearity array is established by basic theory of phased array radar. the problems of instantaneous bandwidth of ocpar and subarray number are researched, the relationship between the excursion of the direction pattern and subarray number, main lobe stretched - out of the direction pattern and bandwidth, side - lobe level of the direction pattern and subarray number, pulse compression and bandwidth, pulse compression and subarray number is analyzed. after corresponding simulations are done, a summary of advantages of ocpar compared with the traditional phased array radar is presented
針對x波段信號，仔細研究了光控相控陣的瞬時帶寬問題和子陣數問題，分析了光控相控陣列方向圖偏移與信號帶寬及子陣數的關系，光控相控陣列方向圖主瓣展寬與帶寬的關系，方向圖旁瓣電平與子陣數的關系，脈沖壓縮與信號帶寬及子陣數的關系，完成了相應的模擬，通過與普通相控陣的對比，總結出了光控相控陣相對于傳統相控陣的巨大優勢。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。But technology is usually a two - side sword, web media brings the human being much benefit ; at the same tune, it seems as if opening the padola box, its " negative effect is obvious : the direct of the public opinon is not clear ; the deed of violating power off often happens ; fictitious news and fithy information are flooding. information trans ceding the region and the national boundaries makes the opion of ethics between the west and the east communicate and collide. at the same time, international media produces a new monopoly
但是，技術從來都是一把「雙刃劍」 ，網路傳播在給人類生活帶來巨大便利的同時，也如同打開了潘多拉的盒子，其負面影響日益顯著：輿論導向模糊；侵權行為頻繁發生；虛假新聞和色情信息泛濫；信息的超地域、超國界流動使得東、西方倫理觀遭遇空前的交流和沖撞，國際傳播產生新的壟斷… …網路技術飛速發展和信息流動的瞬息萬變使得上述倫理沖突幾乎是在一夜之間凸現出來。分享友人