有效聲速 的英文怎麼說
中文拼音 [yǒuxiàoshēngsù]
有效聲速
英文
effective sound velocity-
Different algorithms were compared in the numerical simulation and model experiment of concrete velocity inversion the results showed that, compared with the least - square solutions and the damped least - square solutions, the damped and natural weighted least - square solutions reflected the inner defections of the tested object more reliably and exactly due to the usage of correct priori information, which benefited the suppression of noises and made the iterations of inverse stable and convergent
結果表明，相對于最小二乘法和阻尼最小二乘法，基於自然權的加權阻尼最小二乘演算法，由於利用了正確的先驗信息，不但使反演過程收斂，而且具有數值穩定、抗噪能力強的優點，其成像結果能真實有效地反映對象內部缺陷，因此更適用於混凝土的超聲波速度反演。Objective : to investigate the method and effect of reserved splenectomy on severe traumatic spleen rupture. methods : 31 cases of severe traumatic spleen rupture were retrospectively analyzed. 6 cases were treated by ligating spleen artery with splenorrhaphy, 13 cases by ligating spleen artery with partial splenectomy, 12 cases by splenectomy with autologals spleen transplantation in epiploon, follow - up of all patients was completed from 1 year to 5years. results : all patients recovered. no patients died from surgical operation. patients could work after operation and the susceptibility to disease didn ' t increase. b supersonic inspection showed that : splenic infarction didn ' t exist in patients treated with binding spleen artery, echo sound was heard from transplanted spleen in patients treated with splenectomy and autologous speen transplantation in epiplom. conclusions : it is feasible for patients with severe traumatic spleen rupture to treat by ligating spleen artery with autologous spleen transplantaion in epiploon, which can efficiently control hemorrhage and maintain the function of spleen. splenectomy with autologous spleen transplatation in epiploon is an efficient method to make up furthur function of spleen after splenectomy
目的探討嚴重創傷性脾破裂保脾手術治療的方法及效果.方法回顧性分析嚴重創傷性脾破裂31例保脾手術治療的臨床資料， 6例行脾動脈結扎+修補縫合術， 13例行脾動脈結扎+部分切除術， 12例行脾切除+大網膜自體脾組織移植術.全部獲得隨訪，隨訪時間1 5年.結果本組全部治愈出院，無手術死亡病例.術后均恢復勞動能力，無感染易感性增加， b超檢查提示:脾動脈結扎者無脾梗死情況，脾切除+大網膜自體脾組織移植者在移植部位可見脾組織回聲波.結論對嚴重創傷性脾破裂病例，行脾動脈結扎+修補縫合或部分切除術是可行的，即能迅速有效地控制脾破裂出血，又能維持脾臟功能.脾切除+大網膜自體脾組織移植術是全脾切除術后彌補脾功能的有效方法Both advantages of rocket engine and air - breathing engine are integrated into one kind of propulsion system, called rocket - based - combined - cycle ( rbcc ), which has multiple operating woke modes, including ejecting, subsonic combustion, supersonic combustion and rocket mode, with each mode operating at varying flying stage. rbcc has prominent potential of high efficiency and low cost, and so it is recognized as an advanced propulsion system of future single - stage - to - orbit reusable spacecraft and hipper - sonic missile. it has been broadly investigated in foreign countries and has been progressed into small and full - scale flying stage
火箭基組合動力循環（ rbcc ， rocketbasedcombinedcycle ）將傳統的火箭發動機和吸氣式發動機的優點集中組合到一個具有多種工作模態（包括引射、亞燃、超燃及火箭模態）的發動機里，在不同的飛行階段啟用不同的工作模態，因此具有大幅提高航天推進系統經濟性與高效性的潛在優勢，並可能發展成為下一代單級可重復使用航天器以及高超聲速導彈武器的動力系統。High - intensity ultrasound is used to alter, either physically or chemically, the properties of foods, for example, to activate enzymes, generate emulsions, modify crystallization processes, tenderize meat and extract effective components
功率超聲主要用於食品的物理和化學改性，如活化酶、促進乳化、加速結晶、嫩化肉和有效成分的快速提取等。As we know, correct identification of the psf parameters permits fast high resolution restoration of the blurred image. using the method, we can quickly restore the blurred image on line, and when the noise of the image is bigger, it can perform very well to identifity the blurred distance
當確切知道模糊系統的點擴散函數時，就可以快速有效地恢復模糊圖像，使用本文方法，可以滿足適時性圖像處理的需要，並且不需要事先知道相機的系統參數，在圖像噪聲較大的情況下，也可以很好的確定出來模糊距離。This paper begins with the drawbacks of the traditional reading practice, emphasizes on the designing programs and principles of computers. such as " the discoloring design of characters " leaping - type ", " the hiding design of characters " leaping - type ", " the regulator ' s design of reading speed ", " the time - limited automatic page - turning design ", " sound - controlling design of characters " discoloration " etc. then makes further statements about the advantages of reading practice design with assistance of computer, namely, the arousal of students " reading interest using fresh reading materials with vital forms ; the efficient controls of reading procedure, the realization of reading individualization, the realization of sounds " visualization
本文從分析傳統閱讀訓練的缺陷入手，重點介紹計算機「文字躍進式變色的設計」 、 「文字躍進式隱匿的設計」 、 「閱讀速度調節器的設計」 、 「限時自動翻頁的設計」 、 「聲控文字變色的設計」等設計方案及其設計原理，進而闡述計算機輔助閱讀訓練的優勢，即用形式活潑的閱讀材料激發學生的閱讀興趣，有效地控制學生的閱讀過程，實現閱讀的個性化，實現朗讀聲音的可視化。This formula used inverse regression and data fusion technical and maximum likelihood theory, then this method enabled random sample value obtained in ultrasonic and rebound method of different detection population to mix together effectively, and reach estimation of concrete strength
該公式利用逆回歸理論、數據融合技術和最大似然原理，將回彈值和聲速值分別看作被解釋變量，將來自超聲法和回彈法不同量綱的檢測數據進行有效融合，得出混凝土強度的推定值，該推定結果具有無偏性和方差最小性質。We have access to enormous amount of video and audio clips in this information age. the number is skyrocketing every day. there is not yet an effective way to search through them
在這個資訊時代，我們能夠接達數量大的錄像及聲音資料，這數量還在每日不斷迅速增加，但是我們仍沒有一個有效方法，能在當中搜尋所需要的資料。Abstract : by using the self - regulating electrostatic drying equipment, theelectrostatic drying for plant leaves is studied. the equipment is a surface silent discharge ozone generator. the electrostatic drying and natural drying are compared experimentally. the result shows that the electrostatic field is more effective for plant drying. the polarity characteristics of the electrostatic drying is discovered during the experiment and discussed. for accelerating drying, the polarity characteristics should be considered in the drying equipment design
文摘:在自製的沿面式無聲放電臭氧發生裝置上，對植物葉片進行了乾燥實驗.通過對植物靜電乾燥和自然乾燥的比較，證實靜電場對植物有明顯的乾燥效果.發現了靜電乾燥中的極性效應，即當管狀電極的極性為負時，乾燥速度較快.對極性效應進行了探討和分析.實驗結果表明:沿面式無聲放電臭氧發生裝置可以有效地對植物進行靜電乾燥.研究結果對有效地利用靜電乾燥和極性效應來合理設計靜電乾燥裝置的結構具有重要意義According to the high dispersedness and low precision of measurements when using the traditional time difference method in small diameter and low flow rates conditon, this paper brings forward a new method based on high - speed data acquisition technique. the time difference comes out accurately with high resolving ability of time by using the method and the signal processing algorithms. the developed ultrasonic detection system is composed of two ultrasonic detectors, a transmitting and receiving ultrasonic unit, a high - speed data acquisition unit and a computer
本文針對傳統的時差法在小管徑、低流速測量時，具有測時結果分散性大、測量精度受計數頻率的影響大等不足，創造性地把高速數據採集技術應用在超聲波流量、壓力測量上，用信號處理演算法求時差，使時差成為一個統計量，有效地克服了超聲波傳統時差法測量精度差、不能測量小管徑、低流速流體流量的缺點，提高了時差測量的解析度和精度。Thirdly, the range switch circuit and filter circuit are designed in the analog input channel. to realize the safe high speed acquisition, the interface circuits are separated from the function circuits, and the isolation power with high performance and digital isolator is used to restrain the common mode disturb and noise of the input
3 .模擬輸入通道設計有量程切換電路和濾波電路，並且採用了屏蔽、浮置技術和磁耦隔離技術，使用了高性能的隔離電源和磁電耦合器，有效地抑制了輸入信號的共模干擾和噪聲，實現了安全、高速的數據採集。The frequency analysis results show conclusions as follows : 1. the relative valid spectral power is declined with the volume percentage of inclusions in terms of exponent curve and the tendency of negative direction is same to that of forward direction
當ly12鋁合金細小夾雜物（小於0 . 16mm ）的體積百分數從0 0 . 35時，在35 50mhz的頻帶范圍內，超聲波形的有效譜功率按近似指數曲線快速下降，沿相反方向檢測時其變換趨勢相同。It is a challenge project for us to predict the acoustic radiation of high - speed mechanism, and try to depress it effectively, which is also one of the key problems to solve in the design of mechanical products, aeronautics & astronautics products, and martial products
對高速機構進行準確的噪聲輻射性能分析，有效的抑制機構噪聲輻射，是我們必須面對的一個重要研究課題，這也是機械、航空航天及軍事工業等領域設計良好產品所必須解決的關鍵問題之一。It is a challenge project for us to predict the acoustic radiation of high - speed mechanism, and try to depress it effectively. which is also one of the key problems to solve in the design of mechanical products, aeronautics and astronautics products, and martial products
如何對高速機構進行準確的噪聲輻射預報分析，改善機構的動態特性，有效的抑制機構彈性振動引起的噪聲輻射，是我們必須面對的一個重要研究課題，這是在機械、航空航天及軍事工業等領域設計良好產品所必須解決的關鍵問題之一。The dividing process is recorded by octree, and then we make out the rapid adjacent - field searching algorithm using envelopment - box ' s recursion feature. this algorithm can also kick off some noise - points from the data cloud. it make the consequent process of surface reconstruction more convenience and precise
分割過程採用八叉樹來記錄，並利用包圍盒的遞歸特性實現了點的鄰域的快速搜索演算法，同時可以有效地排除噪聲點，顯著減少了密集散亂數據點雲幾何建模所花費的時間，提高了建模效率。The model is solved with the finite difference method, the simulation software is organized to simulate the transient thermal response of the front region of projectile wing such as those launched by electrothermal chemical guns
採用有限差分法進行數值求解，並編制了較為通用的模擬軟體，用於模擬諸如由電熱化學炮發射的高超聲速穿甲彈彈翼前緣的瞬時熱效應。By means of multi - resolution analysis concept for auto - zooming of wavelet transformation, a multi - resolution gaussian gradient operator which is suitable for noisy edge detection is configured. the experiment results show that this method is an automatic rapid and effective target detection method
該方法利用小波變換的自動變焦的多分辨分析思想，構造了適合的噪聲中邊緣檢測的多解析度高斯梯度運算元。實驗結果表明，該方法是一種快速、有效的自動化目標檢測方法。The design testing piezoelectric material surface acoustic during the experiment process in the paper has several merits : convenience, efficiency, no loss, fastness. and they can be realized. the design applies material piezoelectric response and anti - piezoelectric response to stimulus and receive saw, and apply the method of testing resonator frequency to calculate saw tested speed, simultaneously contrast the actual test result about different material to typical value in the paper
在本論文的研究實驗過程中，給出了一種方便、有效、無損、快捷的檢測壓電材料表面聲速的設計與實現，該設計中運用材料的壓電效應和逆壓電效應激勵和接收saw ，並運用檢測諧振頻率的方法計算測量saw速度，同時給出了對不同材料的實際測試結果以及與資料典型值的對比。But the nnd algorithm can " t reach 2 - order precision, and the cell - centred finite volume algorithm is not suit to solve hypersonic problem. for the efficiency of the four - stage runge - kutta time - stepping scheme is low, and the robust is bad for the hypersonic problem, an implicit time - stepping scheme is adopted. this scheme can preserve the results precision and improve the computing efficiency sharply, and is an innovation for the time - stepping scheme of unstructured grid
為了解決目前傳統四步龍格一庫塔時間推進效率較低、計算高超聲速流場時魯棒性較差的問題，本文改進並採用了一種隱式時間推進格式，能夠在保證精度要求的情況下有效的提高流場計算時的計算效率，對基於非結構網格的時間推進格式有了發展和創新。The instrument adopts the theory of ultrasonic echo for quickly scanning river bed topography under water and employs the principle of resistance for measuring river bed topography upon water and shallow beach topography, which increases the measuring speed effectively and decreases the disturbing influence on river bed
該儀器採用超聲測量原理實現了水下地形的無接觸快速掃描測量，採用阻抗原理實現了洲灘、邊灘、淺灘的地形測量，有效提高了測量速度，並減小了對河床的擾動影響。分享友人