空化噪聲 的英文怎麼說
中文拼音 [kōnghuàzàoshēng]
空化噪聲
英文
cavitation noise-
Long - hole and geometrical proportion type of mixing unit is finally adapted in lpg supply system, and power and torque output of lpg engine are improved by increasing compression ratio, and ignition characteristic is tried to adjusted to satisfy engine performance. meantime emission performance and noise level of lpg engine at full - throttle and other various part - throttle operations are tested and compared with former gasoline engine. ( 3 ) it is verified by engine dyno tests that lpg engine has better synthesized performance at aspects of power and torque, fuel economy, as well as emission than former gasoline engine
選擇了等比例長孔式混合器控制空燃比；通過提高壓縮比來彌補動力性的損失；以動力性為主控目標，對最大功率點、最大扭矩點、中等轉速、最低轉速點所對應的發動機轉速做了點火特性的調節；通過空燃比的合理控制，直接改善發動機的動力性、經濟和排放指標；作為對缸內燃燒過程的理論分析，進行了燃燒特性的實驗測試；對原汽油機和新開發的液化石油氣發動機，進行了外特性和部分負荷特性以及怠速的排放及噪聲對比性測試。The flanerie in lens, the indifference in eyes, the sound and fury, the emptiness and mess, the rambling images, possibly, all that bring to you is not entertainment, not reflection, but further confusion : the seemingly serious birthday, the no - nonsense sales promotion, the violence in broad daylight, the apparently naive adult games, the nationwide whoopee, the spookish fireworks and the trembling blowout : as if it is a sacrifice for the riproaring time
鏡頭中的漫無目的，眼睛里的司空見慣，喧鬧暴戾的噪聲，空寂凌亂的畫面，略帶散漫的影像，給你帶來的也許不是享受，不是思考，而是進一步的混亂? ? ?你會看到煞有介事滿月，一本正經的促銷，光天化日下的暴力，不動聲色的悲哀，看似天真的成人游戲，舉國歡騰的萬眾狂歡，幽靈一般的焰火和讓人戰栗的爆裂? ? ?像是祭奠著這個喧囂的年代。According to importance of ecosystem services, the function of fixing carbon and releasing oxygen is the most important, the function of conditioning climate is the second, and the functions of keeping waterhead, preserving soil, purifying environment, and restraining noises are also important
依據重要性，由大到小依次為固碳釋氧功能、調節氣候功能、涵養水源功能、保持土壤功能、凈化空氣功能與減弱噪聲功能。Meanwhile, the importance of different ecosystem services in urban areas is different. the function of fixing carbon and releasing oxygen is the most important, the function of conditioning climate is the second, and the functions of keeping waterhead, preserving soil, purifying environment, and restraining noises are the last important
同時，城市生態系統各生態服務功能的重要性，由大到小依次為固碳釋氧功能調節氣候功能涵養水源功能保持土壤功能凈化空氣功能與減弱噪聲功能。This paper attentatively studies the theory of traveling bubble cavitation noise emitted from high - speed underwater self - navigator of schiebe body
本文針對回轉體形水下高速自主航行器產生的流動泡類型的空化所輻射的噪聲理論進行了探索性的研究。It was through precise mathematical deduction, data imitation, and analysis to experimental data that this topic is studied. this dissertation is theoretically instructive and practically useful, to a certain extent, to the traveling bubble cavitation noise around a schiebe body
全文通過嚴密的數學推導，模擬和實驗數據分析等方法實現對這一課題的研究，對于回轉體流動泡類型的空化噪聲具有一定的理論指導意義和現實應用價值。Firstly it discusses the value, meaning, background and method of this topic. then it deducts the single - bubble sound pressure, spectrum of sound pressure, power spectrum. according to the real situation of traveling bubble cavitation noise around a schiebe body, the mathematical model of single - bubble collapse is selected, furthermore, the mathematical model of mass traveling bubbles without interference effect is established, and the multi - peaks and rebound phenomenon while bubbles collapse is also analyzed with statistical method
首先論證了本項研究的意義，價值，背景和方法，然後推出了單空泡輻射噪聲聲壓，聲壓譜和功率譜，針對回轉體流動泡空化噪聲的具體情況，選擇了雙指數模型作為單空泡潰滅的數學模型，進一步建立了無干涉條件下的群泡輻射噪聲的數學模型，並用統計的方法分析了空泡潰滅時的多峰值和反彈現象。On the other hand, the harmonic and surge current in capacitor banks is restrained so that the capaci - tor is protected by reactor. since this type of reactor has a dry - type air - cored structure, no - core structure without ferromagnetic induc - tion effect, it is provided with the feature of good linearity and low noise, so that the product is convenient for maintenance and ope - ration in all weather
該型電抗器採用乾式空心結構，維護簡單，運行安全，無鐵心，不存在鐵磁飽和，電感值不會隨電流變化而變化，線性度好，噪聲低，適合全天候條件下運行。This thesis explains the necessity of the character recognition technology of the computer at first, describe the meaning in which the handwritten numeral discerns ; pretreatment technology of handwritten numeral recognition, including two value, line segmentation, word segmentation smooth, removing noising, standardization and thinning are discussed two value concretely discusses whole threshold value, some threshold value, dynamic threshold value and utilize space information to carry on threshold, which are several kinds of common method of choosing threshold value, especially utilize space information to carry on threshold value is describe in detail ; adopting to the foundation of thinning based on mathematics morphology, thinning algorithm of serials same and thinning algorithm of protecting shape are discussed ; afterwards, according to principle ' s diagram of the on - line character recognition, by analyzing the structure feature of the handwritten numeral, this thesis has proposed the online recognition te chnology of the free handwritten numeral based on the stroke feature and the online recognition technology of the free handwritten numeral based on the multistage classifying device. detail narrated noise removing, stroke characteristic definition and discernment, distance criterion of whole word match ; then under the foundation of handwritten numeral segmentation, off - line handwritten numeral recognition is researched. especially minimum distance classifying device, tree classifying device and adaptive resonance ( art ) network classifying device is discussed at the same time, believes degree analyses are introduced to integrate a lot of classifying devices ; at the end, the typical application of the handwritten numeral recognition was briefly narrated, its application in extensive data statistics, financial affairs, tax, finance and mail sorting have been explored
二值化時對整體閾值二值化、局部閾值二值化、動態閾值二值化和利用空間信息進行閾值選取幾種常用的閾值選取方法進行討論，特別對利用空間信息進行閾值選取進行了詳細論述；在對通過對基於數學形態學的細化的基礎上，討論序貫同倫形態細化演算法和保形的快速形態細化演算法；然後依據聯機字元識別原理框圖，分析了手寫數字的結構特點，提出了基於筆劃特徵的任意手寫數字在線識別技術和基於多級分類器任意手寫數字在線識別技術，對其中涉及的筆劃識別前的噪聲處理、筆劃間特徵量的定義及識別、整字匹配的距離準則進行了詳細敘述；繼而在對手寫數字的分割的基礎下對脫機手寫數字識別進行了研究，對基於最小距離分類器字元識別、基於樹分類器的字元識別、基於自適應共振（ art ）網路的字元識別分別進行了詳細討論，並引入置信度分析將多個分類器進行了混合集成；最後簡單闡述了手寫數字識別的典型應用，對其在大規模數據統計、財務、稅務、金融及郵件分揀中的應用進行了探索。These characteristics and phenomenons have effect on the quality of gear pump, and it is difficult relatively to research them by theory. at present the research is limited to the phase of examination testing. theoretic research of the characteristics and the phenomenons of polymer gear pump are blank in china when the gear pump feeds the viscous polymer liquid of chemical flow with high temperature and high pressure
齒輪泵除具有流量和容積效率、扭矩和機械效率、功率和總效率等基本特性外，還存在著困油、噪聲和氣穴等現象，這些特性和現象直接影響齒輪泵的質量，對斜齒齒輪泵的這些特性和現象的理論研究難度較大，目前大多仍局限於實驗測試研究階段，而聚合物齒輪泵在輸送化工流程中的高溫、高壓的粘流態聚合物時特性的理論研究在國內基本還處于空白。Noise generation during the simultaneous collapse of two bubbles
雙空泡潰滅及空化噪聲的建模The extend work of my doctoral research is introduced in the part. problems of cavitation noise are investigated with three methods such as theory analysis, numerical simulation and experiment research. mixed boundary element method is put forward to solve acoustics of bubble collapse by author
第二部分：空化噪聲研究該部分工作是作者博士期間工作的延續，對空化噪聲問題從理論分析方面、數值模擬及實驗三方面進行研究，應用作者提出的混合邊界元方法求解了空泡在邊界附近潰滅時的輻射噪聲問題。The multiscale modulation spectrum analysis based on the mulitresolution analysis of noise caused by ship propoller cavitation
螺旋槳空化噪聲的小波多尺度調制譜分析The wavelet method is applied to analyze the transient record of cavitation noise of bubble collapse successfully
同時引入了小波方法對瞬態的空化噪聲信號進行了分析，取得了良好的效果。Through an investigation of cavitation of ultrasonic wave cleaning, the cause of cavitation noise and its effect factors are analysed, and some advices to reduce the influence of cavitation noise to environment are proposed
摘要通過對超聲波清洗中空化現象的研究，分析了空化噪聲產生的原因和影響因素，提出一些減小空化噪聲對環境影響的方法。Three phase dry type power transformer, which make it with those features : safety, reliability, and energy saving, fireproof, flameproof, simple maintenance etc., the design is advanced ; the structure of products is reasonable and the outline is fine, the main performances of the products are much better than the national standards, for example, partial discharge level no - load loss, on - load loss, noise level, it is adaptable for application on heavy humidity and severely pollute places which are near to lake, sea and rive, as well as, high demand - fireproof, heavy load capacity place, such as : high building, airport, station, port, underground, hospital, electrical power station, metallurgy, shopping center, residential area and petroleum chemical industry, nuclear power station, nuclear - powered submarine
非包封線圈三相干式變壓器，具有安全可靠節能防火防爆維護簡單等優點。其設計先進結構合理外形美觀。主要性能指標均優于國內標準，如局放水平空載損耗負載損耗噪聲以及能適應高溫度環境使用等，可安裝在靠近湖海河邊污穢潮濕的環境及防火要求高負荷較大的地區，適用於高層建築機場車站碼頭地鐵醫院電廠冶金行業購物中心居民密集區以及石油化工核電站核潛艇等場所。Blade design optimization problems are multimodal and discontinuous problems, the use of gradient - based numerical optimization algorithms perform inefficiently and drop into local minimum prematurely. hence, the exploratory algorithms such as gas are required for global exploration. 4
4 .通過rsm方法擬合復雜的響應關系，平滑設計空間「噪聲」 ，能夠防止數值優化方法陷入局部極值點，獲得良好的魯棒性和適應性。2, the optimal designed digital matched spatial filter ( dmsf ) was used to perform real - time optical correlation, which not only has the merit of large storage and renewability as well as common digital filter, but also has the virtue of high correlation s / n which the holographic optical filer owns
2 、優化設計的數字空間匹配濾波器，既有數字濾波器的大存儲容量並可實時刷新的特點，又有全息光學濾波器高相關s n的優點。對于處于嚴重背景噪聲干擾下的多個畸變目標，也可獲得高相關s n 。By the line of cross - cut, the 2 - d fmm ii with multiplicative noises is transformed into the form of 1 - d model, then the proposed algorithm is obtained on the basis of state estimation theory of the 1 - d systems
利用斜割支線法，通過定義新的變量，巧妙地將帶乘性噪聲的2 - dfmm模型轉化為一維帶乘性噪聲的狀態空間模型。Public transportation : double deck bus, fully integral bus, sightseeing roofless bus, extra length and high capacity bus, luxury bus, environmental friendly bus, and parts and other equipment specially used for bus, such as air conditioner and noise control system, etc
公共交通：雙層公交巴士、全承載式公交客車、地鐵化公交車、觀光敞篷公交車，超長大容量公交巴士、低地板公交客車、高檔公交客車、環保公交車及專用於公交客車的空調、噪聲控制系統等車輛配件及其它專用設備。分享友人