近聲速 的英文怎麼說
中文拼音 [jìnshēngsù]
近聲速
英文
near sonic speed-
The study includes the hole color tv imagery system for drill hole, even - pole bore - hole acoustic system and acoustic meter, bore - hole multi - point consolidation apparatus, the quick camera computer - aid image for high rocky slope, image technology for layer analysis, safety monitoring technology for the section close to the dam, software for processing and forecasting the slope monitoring data, high precision geodesy monitoring automation system, etc. all the study results are new, advanced and practical, which has applied in the project and gained the obvious benefits
鉆孔彩色電視孔壁成像系統、直接橫波測井研究偶極子井下聲系和聲波儀、鉆孔多點滲壓儀及壓模系統、巖質高邊坡快速攝像微機地質素描成圖、層析成像技術、近壩庫段安全監測技術、邊坡監測數據處理預報軟體研究、高精度大地測量監測自動化系統等項目，研究成果內容新、先進、實用，已在工程中應用，效益顯著。There are altogether 3 dressing rooms, totalled 10 small and big dressing rooms and dressing rooms for special profiles, plus underground dressing rooms, they can hold as many as 1000 actors and other personnel. what s more there is a more than 200 square meters of multi - track recording studio and high speed recording division with daily production 8000 cassette tapes, therefore, a comprehensive service system including performance, recording and tape production is formed
劇院臺口寬15米、高8米、臺深21米，后臺化妝間共有三層，大小化妝間及特型演員化妝間共計10個，加上地下室演員化妝間，可容納近千名演職人員共同使用。中國劇院還有200平方米的多聲軌錄音棚和日生產量達8000盤盒式錄音帶的高速復錄部，從而形成了演出、錄音及音帶製作全方位的服務系統。A catbird, the northern mocker, lit in a tree over tom s head, and trilled out her imitations of her neighbors in a rapture of enjoyment ; then a shrill jay swept down, a flash of blue flame, and stopped on a twig almost within the boy s reach, cocked his head to one side and eyed the strangers with a consuming curiosity ; a gray squirrel and a big fellow of the " fox " kind came skurrying along, sitting up at intervals to inspect and chatter at the boys, for the wild things had probably never seen a human being before and scarcely knew whether to be afraid or not
有一隻貓鵲一種北方的學舌鳥在湯姆頭頂上的一棵大樹上落下來，模仿著它附近別的鳥兒的叫聲，叫得歡天喜地。隨后又有一隻?鳥尖叫著疾飛而下，像一團一閃而過的藍色火焰，落到一根小樹枝上，湯姆幾乎一伸手就能夠到它。它歪著腦袋，十分好奇地打量著這幾位不速之客還有一隻灰色的松鼠和一隻狐貍類的大東西匆匆跑來，一會兒坐著觀察這幾個孩子，一會兒又沖他們叫幾聲。These appliances, available from companies such as decru, neoscale, and vormetric, implement very fast encryption - they typically claim to operate at or close to " wire speed. " they also usually include sophisticated key management facilities for controlling the creation and distribution of cipher keys, cycling of keys, and disposition of keys, besides handling general data encryption
Decru 、 neoscale和vormetric等公司都能提供這些器件，它們實現了非常快的加密通常被聲稱速度達到或接近「線速」 。它們還常常包括高級的密鑰管理設施，除了用於處理一般的數據加密外，還可用於控制密鑰的創建和分發、密鑰的循環和密鑰的銷毀。Being a sort of new principle micromotor in the fronitier of science. the ultrosonic motor ( usm ) is developed at recently twenty years. utilizing the stator surface particle elliptical motion excited by piezoceeramics, the usm is drived by friction force between the stator and rotor. compared with the conventional electromagnetic motor, the ultrasonic motor has the following features : high speed, high holding torque when power is off and so on. because of it ' s characteristics, the ultrasonic motor has obtained some widespread application in robots, precise instrument, house electronical appliance, sapceecraft automobile and micromechanism
超聲波電機（ ultrasonicmotor ）是近二十年來發展起來的一種新原理電機，其原理不同於傳統的電磁型電機，它是利用壓電陶瓷的逆壓電效應使定子的表面質點產生橢圓運動，通過定子和轉子之間的摩擦力驅動轉子運動。這種新型的電機與傳統電磁電機相比，具有響應快、不受電磁干擾、結構緊湊、低速、大扭矩、斷電自鎖等優點，因而在微型機械、機器人、精密儀器、家用電器、航天器、汽車等方面顯示出廣泛的應用前景。Finally, at long ranges, the blast wave becomes essentially a sound wave and its velocity approaches ambient sound velocity.
最後，在很遠的距離處，爆震波基本上就變成一種聲波，其速度已接近周圍的聲速。With the development of power electronics technology and devices in recent years, instead of using the industrial frequency transformer to boost voltage, dc / dc high frequency converter achieves the function. the system has higher power density and conversion efficiency, and the size, weight, ac noise of which has been greatly reduced
近年來，隨著電力電子技術與器件的迅速發展，使用dc dc高頻變換技術代替工頻升壓，系統具有較高的功率密度與轉換效率，裝置體積、重量與交流噪聲大大減小。In this paper, taking the measured error sound velocity profile as the initial guess value, the sound beam travel times and beam angle recorded by the multi - beam system and the generalized linear inversion method are used to get a sound velocity profile close to the actual sound velocity profile, and the inversed sound velocity profiles have contributed to the reduction of sound velocity profile error
摘要以測得的誤差聲速剖面作為初始猜測值，利用多波束記錄到的波束傳播時間和波束角等信息，通過廣義線性反演得到一個與實際聲速剖面比較接近的聲速剖面，這有助於減少聲速剖面的誤差。The dolphins could be shy and easily startled by loud boat engines or by boat traffic that approaches them quickly and directly
海豚生性害羞，容易因船艇快速接近嘈雜的引擎聲及頻繁的船艇交通驚嚇。Backed up by the soplat theory based on particle kinematics, the second chapter of this paper presents with analysis and simulation of several single observer passive measurement models, which uses such relative movement parameters as bearings changing rates and centrifugal acceleration information on the basis of bearings measurements. in the third chapter, the observability of location respectively using bearings and its changing rates information and centrifugal acceleration information is analyzed, and its observable condition is got. the fourth chapter puts forward the modified covariance extended kalman filtering ( mvekf ) against the defect of traditional extended kalman filtering ( ekf ), whose performance is simultaneously compared in the chapter with the performance of ususal tracking algorithm such as ekf, mgekf, iekf by computer simulation
在近年來提出的基於質點運動學原理的單站無源定位理論基礎上，本文第二章提出了幾種在角度測量的基礎上增加角度變化率及相對運動的離心加速度等運動學參數的單站無源測量模型，並對它們進行了分析和模擬；第三章分別對利用角度及其變化率信息定位和利用離心加速度信息定位的可觀測性進行分析並得到了相應的可觀測條件；第四章針對傳統擴展卡爾曼（ ekf ）方法的缺點，提出了一種修正協方差的擴展卡爾曼濾波（ mvefk ）方法，並將其和ekf 、 mgekf 、 iekf等常用的單站無源定位濾波方法進行了性能模擬比較；第五章通過引入雷達機動目標跟蹤方法和模型，提出了利用角度及其變化率對機動輻射源跟蹤的多級噪聲自適應方法和imm方法；第六章主要對角度變化率和離心加速度參數的獲取技術進行了研究，提出了幾種高精度測量脈沖序列多普勒頻率變化率的方法。About 34 per cent of canadian parents surveyed said they believe that if a child were drowning nearby, they would hear splashing, crying and screaming, but drownings often happen quickly and silently
接受采訪的大約34的加拿大家長表示，他們相信如果一個孩子在附近溺水，他們將聽到濺水聲，哭聲和尖叫聲，但溺水往往出現迅速並且無聲。At that moment in the distance behind kutuzov there were sounds of regiments saluting ; the shouts came rapidly nearer along the whole drawn - out line of the advancing russian columns
這時候，庫圖佐夫後面可以聽見遠處傳來的各個兵團請安的聲音，這種聲音開始迅速地臨近於進軍中排成一字長蛇陣的俄國縱隊的全線。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。Lt is obvious that the decaying rule of average reverberation intensity is affected by scattering coefficient of sea floor, sound speed profile, inclination of bottom etc. the sea floor scattering function is the most importan factor to the intensity decaying rule
結果表明：海底散射方向性指數因子、海水聲速梯度、海底傾斜角等對海洋混響平均強度的衰減皆有影響。海底散射方向性指數因子對其影響最大，即適當選取海底散射模型是淺海近程混響建模的首要因素。Test method for sonic velocity in manufactured carbon and graphite materials for use in obtaining an approximate young s modulus
獲取近似楊氏模量用人造碳和石墨材料中聲速的試驗方法The results show that to design a supersonic / hypersonic nozzle of wind tunnel must consider the effect of variable specific heat, which gives reference to nozzle and wind tunnel design
考慮這一因素后，噴管出口馬赫數接近設計馬赫數，其設計精度有較大提高。本方法可為超音速高超聲速噴管設計和反設計提供參考。Better agreements between computation results and experimental data were found using the models. ( 4 ) two phenomena in straight - convergent - divergent - straight microchannels were identified, which are different from the macroflow through experimental studies. one is that the first appearing sonic point position in microchannels is not near throat cross - section
（ 4 ）對等直收縮擴張等直微管道中氣體流動的實驗研究發現兩個特異現象：其一為微管道內最早出現聲速點的位置不一定在喉部附近，其二為微管道中的臨界壓比與常規值有很大差別。In this study a primary method for designing a waverider configuration is developed based on the approximate solution of conical flow fields. the simplified cone - derived shock wave is discussed as the basic model for design. different shapes designed from different compression angles and basic geometric coefficients at the same mach number are put into analysis
本文基於高超聲速條件下錐型流近似解提出了高超聲速乘波構形的初步設計方案，對于不同馬赫數、壓縮角以及幾何設計參數進行了外形設計並就參數對設計外形的影響進行了討論，得到了設計參數影響外形的基本規律。Standard test method for sonic velocity in refractory materials at room temperature and its use in obtaining an approximate young ' s modulus
室溫下耐火材料中的聲速及聲速在測量近似楊氏模量中的應用的標準試驗方法The advantages and design requirements of inlets have led to study of inlet ’ s starting characteristics
近年來，高超聲速進氣道不起動問題越來越引起人們的重視。分享友人