波延科 的英文怎麼說
中文拼音 [bōyánkē]
波延科
英文
pojenko-
Hydraulic pile hammer is one of the pile driving machines that drive prefabricated piles into the ground in the construction of pile foundation such as construction, bridge, dock, etc. with the development of science and technology, the prefabricated pile driving machines evolve from block hammer, steam - hammer, diesel hammer to hydraulic hammer. hydraulic pile hammer is one of ideal prefabricated pile driving machines because it can adjust stress waveform, decrease stress peak value, prolong effectual action when it drives piles. hydraulic pile hammer is used widely and formed series in developed countries now
液壓打樁錘是用於建築、橋梁、碼頭等樁基礎施工中打入預制樁的樁工機械。隨著科學技術的進步，預制樁施工機械由落錘、汽錘、柴油錘，發展到了液壓打樁錘。用液壓打樁錘打樁，可以調整撞擊應力波波形，減小應力峰值，延長有效作用時間，是一種比較理想的預制樁施工機械，目前在發達國家已被廣泛使用，並形成了系列化。There are two uncertain factor about it : the phase of the pn code and the doppler - shift. after capturing the received signal successfully, the traditional ds receiver always uses a delay locked loop ( dll ) to synchronize the pn code and then uses a costas loop to realize the carrier synchronization. this complex closed - loop structure not only take long time to realize the synchronization, but also has the defect of “ hang up ”
傳統的擴頻接收機通常在捕獲偽碼信號后利用遲早門鑒相的延時鎖定環來實現偽碼的精同步，解擴后利用科斯塔斯環實現載波同步，這種閉環結構不僅同步時間長、結構復雜，而且鎖相環還存在所謂的「 hang - up 」現象。Based on the importance of pulse / pattern generator, the work of this dissertation comes from the project “ high speed pulse / pattern generator ”, which is taken on by the university of electronic science and technology of china. the dissertation focuses on the process of pulse generating, and its main task is to generate pulse waveforms with adjustable parameters ( including period, pulse delay, pulse width and etc )
基於研發脈沖/數據發生器的重要性，結合電子科技大學承擔的科研項目「脈沖/數據發生器」 ，本文圍繞脈沖的產生的過程進行展開研究，主要任務是實現具有各種參數（包括周期、脈沖延遲、脈沖寬度等）可調的脈沖數字波形。With the development of thin film science and technology, various thin film preparation techniques developed rapidly, as a result, conventional so - called filming has developed from single vacuum evaporation to many new film preparation techniques, such as ion plating, sputtering, laser deposition, cvd, pecvd, mocvd, mbe, liquid growth, microwave and mtwecr, etc., of which vacuum evaporation is the common technology for thin film preparation, because it has the distinct advantage of high quality of film deposition, good control - ability of deposition rate and high versatility
隨著薄膜科學與技術的發展，各種薄膜制備方法得到了迅速發展，傳統的所謂鍍膜，已從單一的真空蒸發發展到包括蒸鍍、離子鍍、濺射鍍膜、化學氣相沉積（ cvd ） 、 pecvd 、 mocvd 、分子束外延（ mbe ） 、液相生長、微波法及微波電子共旋（ mwecr ）等在內的成膜技術。其中電子束蒸發技術是一種常用的薄膜制備技術，它具有成膜質量高，速率可控性好，通用性強等優點。While the current criteria for determining the suitability of crt are very restrictive and not sensitive, the division of cardiology has employed cutting edge technology in echocardiography to diagnose and predict which patient group ( s ) will have the best response to crt. usually symptoms such as shortness of breath and fatigue can be easily neglected by patients and hence diagnosis will be delayed until very late or the situation is very severe and dangerous that hospitalization is required
患上心臟衰竭的病人可能會忽略氣喘、疲倦的癥狀，延誤診斷。心臟科人員利用尖端的超聲波儀器及標測科技推斷那類患上心臟衰竭的病人對心臟同步起搏療法有最好反應，有效地挑選合適採用這項療法的病人，比以往篩選病人進行該療法的方法更準確及有效率，為心臟衰竭的治療跨進重大的一步。In recent several decades, ultrasonic phased arrays had been applied to many medical specialties and nondestructive evaluation ( nde ). an ultrasonic phased array consists of multiple elements which are usually cut or etched from a single piezoelectric plate of lead zirconate titinate ( pzt ). the element thickness determines the operating frequency of the transducer
近年來，隨著科學技術的飛速發展，超聲相控陣已廣泛的應用在醫學、無損檢測等方面，所謂相控陣，就是由多個壓電陶瓷片（陣元）按一定的分佈排列，然後逐次按欲先規定的延遲時間激發，就可以實現聲波的聚焦。California peninsula goes to south just like a arm of north american continent, from north, more than 1200 kilometer is continuous, department er the ten thousands of this special sea inclines blue waves, take tightly in the bosom of mexico
加利福尼亞半島好像北美大陸的一條手臂，從北到南，綿延1200多公里，把科爾特斯海的萬傾碧波，緊緊地攬在墨西哥的懷抱里。分享友人