次生噪聲 的英文怎麼說
中文拼音 [cìshēngzàoshēng]
次生噪聲
英文
secondary noise-
The noise constantly is not affecting our normal life, for example ; just repaired the family, to the quiet at dead of night building about the water pipe noise, has caused you to be unable normally to rest, the senior citizen, the neurasthenia, the heart was not specially good and so on the community, was is unable to rest, the saint porch company produced " the down - flow pipe sound insulation wrap " the product, fundamentally has solved this problem, this product has used the advanced sound insulation, the sound absorption, the material, passed through the specialized technical many years research development, and experimented after the beijing ten plots different levels owner, the sound - insulated effect achieved above 90 %, satisfaction rate reached above 99 %, did not have an example suit, received the owners universal welcome
噪音無時無刻不在影響著我們正常的生活，例如；一個剛剛裝修完的家庭，到了夜深人靜樓上下水管的噪聲，使你無法正常休息，特別是老年人，神經衰弱，心臟不好等群體，更是無法休息，聖軒公司生產的「下水管隔聲套」產品，從根本上解決了這個問題，此產品採用了先進的隔音，吸音，材料，經過專業技術多年的研究開發，並經過北京十個小區不同層次業主試驗，隔音效果達到90 %以上，滿意率達99 %以上，無一例投訴，受到業主們普遍歡迎。In the present dissertation, friction - induced noises emitted by a flat specimen rubbing against another flat specimen or a ball specimen under reciprocating sliding are studied. the detailed observation of the scars is conducted by means of a scanning electrical microscope ( sem ), laser scanning microscope ( lsm ), optical microscope and profilometer. the dynamic state variables are analyzed in detail using the discrete wavelet transform
使用電子掃描顯微鏡（ sem ） 、激光掃描顯微鏡（ lsm ） 、光學顯微鏡和表面輪廓測量儀等設備對摩擦噪聲發生的區域進行了詳細的觀察和分析，運用小波變換技術對摩擦噪聲狀態下的動力學變量進行了深層次的研究，應用matlab simulink語言對摩擦系統進行了振動動力學模擬，系統地研究了摩擦噪聲的形成機理。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。Abstract : in this paper, the reason arisen from the noise of the bx1 ac arc welder is analysed. for the main factor, moving core viberating, the measure to reduce the noise is advanced from three hands, inside and outside slide. the other measure is also advanced for the second factor
文摘:對bx1系列交流弧焊機噪聲產生的原因進行了分析，針對產生噪聲的主要原因? ?動鐵芯的振動，從三個方面、內外滑道分別提出了具體的降低措施，並對次要原因也提出了具體降低措施。Secondly, by means of the measurement of the vibration and associated noise, the area in the presence of the friction - induced noise is determined accurately. as a result, a comparative analysis on the topography of the scar surfaces with and without noise is performed in detail
其次，利用動力學和聲學測量技術確定了摩擦噪聲所發生的區域，在此基礎上對磨痕上表面形貌進行了詳細的對比分析，發現有噪聲區域的形貌明顯不同於沒有噪聲區域的形貌。2. using the simulation method and a lorentzian oscillator model, the influence of the deviation in experimental parameters, including the thickness of samples, the incident angle, the misalignment of the time delay line, the background noise and the laser noise is analyzed
二、首次利用模擬thz輻射脈沖入射到共振吸收的樣品上的方法分析了厚度、角度、平移臺錯位、背景噪聲及激光器噪聲等對于光學常數測量產生的影響。Firstly, a fourth - orders statistic hypothesis testing in inter - frame difference is used to automatically separate the moving areas from the background in a general video sequence. secondly, change areas are extracted as markers of the corresponding moving object. using the marker, region - growing algorithm can locate the precise boundary of moving object
（ 3 ）基於輪廓跟蹤；首先介紹了提取初始模板方法?基於高次統計的判決演算法，通過選擇合適的背景噪聲閾值，最終得到較好的結果，然後對於後續幀中的邊界提取，提出將灰度圖像所使用的區域生長方法進行改進，即將它們運用到彩色圖像中，通過選擇合適的生長規則，得到較好邊界圖。In term of the characteristic of the item regarded, it is concluded that the exhaust gas produced by refectory and automobile is the source of air pollution, and the noise pollution is emanating from automobile and habitation, and the sewerage is derived from the domestic sewage, and the main garbage comes from living garbage
根據該項目的特點，此次評價確定食堂燃油產生的廢氣和汽車尾氣是主要的大氣污染源，車輛和生活噪聲是主要的噪聲源，生活污水是主要的排污水，生活垃圾是主要的固體廢棄物。The calculated results showed that the disturbing could accelerate the grow of the secondary arms and the anisotropy was important to the dendrite growth
計算結果表明：噪聲的加入會促進二次枝晶的生長；各向異性系數對枝晶的生長有重要作用。Mentally audible : fully 30 % of psionic weapons telepathically mutter, croon, recite battle poems, scream, or produce other mental “ noises ” when first drawn, at first blood, or when they slay a significant enemy
心靈可聞：至少30 %的靈能武器在第一次出鞘、第一次見血或幹掉一個重要敵人時會以心靈感應方式嘀咕、低吟、背戰詩、尖叫或產生其他心靈「噪聲」 。The apsp produced abroad is made by numerical controlled machine tool, which has noise level of 71db ( a ), the apsp produced in our country is made in the method of exploratory which has noise level of 73db ( a ) and 75db ( a ). in order to analyze the influence of stator curve to noise, the author used tri - coordinate measuring instrument to measured exactly the inside surface of stator and got the straddling point coordinate, and made curve fitting by using matlab as language and studied the fitting effect and then worked out the equation of stator transition curve in return seeking, then comparied this method with the standard style and made the conclusion : the equation of atator transiting curve of apsp made by numerical controlled machine tool is close to theorical 5 power curve standard style, but compared with it, the stator transiting curve of apsp produced in exploratory has a major error. combining the testing results of noise, one can know that the qualily of stator transition curve play an importance to t he noise of the pump
國外生產的汽車動力轉向泵是用數控機床加工的，其噪聲值為71db （ a ） ，國內生產的汽車動力轉向泵是用靠模方法加工的，其噪聲值分別為73db （ a ）和75db （ a ） ，為了分析定子曲線對泵的噪聲的影響，本人用三坐標測量儀對定子內表面進行精密測量，獲得定子內表面的離散點坐標，以matlab語言為工具對離散點進行曲線擬合，觀察擬合效果，然後，用回歸方法求出了定子過渡曲線的方程，並把該方程與理論方程標準型進行了比較，得出如下結論：用數控機床生產的汽車動力轉向泵的定子過渡曲線方程非常接近理論5次曲線標準型，而用靠模方法加工的汽車動力轉向泵的定子過渡曲線與理論5次曲線標準型相比較，則存在著較大的誤差，結合噪聲測試結果可知，定子過渡曲線的優劣，對泵的噪聲大小有著重要的影響。First, the basic theory of the competitiveness is analyzed, evaluating indexes which conclude relative and absolute indexes basic on the last literatures are set up. second, because the data are too many and computing time is too long, the competitiveness of science and technology of 30 areas are clustered using fuzzy clustering model, the areas of the whole nation are clustered several kinds and we can draw some conclusions of same kind. evaluating the competitiveness using single model can produce white noise, so combinational models which concluding neural network, fuzzy theory and genetic algorithm are brought forward to evaluate the competitiveness of areas which are in the same kind with fujian province in the test
本文首先分析科技競爭力的基本理論，並根據以往研究科技競爭力文獻，建立包含絕對指標和相對指標的評價科技競爭力評價指標體系，其次，針對評價福建省科技競爭力在全國范圍內的排名情況數據較多，計算時間較長的具體情況，利用模糊神經網路模型對全國30個省市自治區科技競爭力水平進行聚類分析，將科技競爭力水平接近的地區聚為一類，得出科技競爭力水平相近地區情況，而後，針對已有文獻科技競爭力評價只是利用單一模型可能產生噪聲，影響評價結果，並且主觀性較強的缺點，本文將神經網路、模糊數學、遺傳演算法等智能演算法組合，利用組合評價模型對福建省和與福建省同在一類的其它地區的科技競爭力水平進行橫向、縱向評價，得出福建省在全國范圍內的科技競爭力水平排名。The former one is a product of the pressure pulsation resulting from the fan blade periodically cutting the air, with the blade passing frequency as its base frequency and accompanied by higher harmonics. the wide - band turbulent noise is formed when the rotating fan forces the surrounding air to produce turbulent throw - outs and results in gas thickening and thinning processes
旋轉噪聲是由於風扇的葉片周期性地切割空氣，引起空氣的壓力脈動產生的，以葉片通過頻率為基頻，並伴有高次諧波。湍流噪聲是由於風扇運動導致的周圍空氣發生湍流脫體，使空氣發生擾動，形成氣體的壓縮與稀疏過程而形成的，是一個寬頻帶噪聲。The impact on the muffler performance is realized by the high - speed pulsation gas flow, which regenerates noises and strikes the acoustic elements of the muffler such as the pipe run, the body case and the separator plate to arouse the vibration radiated noise
氣流影響消聲器性能的主要原因是發動機排氣的高速脈動氣流再生噪聲，其次是這種氣流會沖擊消聲器的管路、殼體、隔板等聲學元件，進而激發振動輻射噪聲。But subway can produce serious vibration and noise in its operation, and bring out sub - structural noise and vibration of building along the line. this is a kind of serious pollution to urban environment, and sometimes affects the people ’ s working and living condition nearby. this has aroused more and more publics and relevant departments to pay attention on it
但在運營過程中會產生很嚴重的振動和噪聲，並誘發沿線臨近建築物的振動和二次結構噪聲，這對于城市環境是一種嚴重的交通污染，給沿線人們的工作和生活造成了嚴重的影響，已經引起了越來越多的公眾和有關部門的重視。Second, introduce the dyadic wavelet analysis, and use it realized the signal monitor and analysis to the turbine compressor, obtained the detail signal and approach signal at different frequency parts of the compressor s original signal. one type of electromotor that made in china is choose, and it s noise is tested. the noise signal is analyzed by wavelet analysis and spectrum analysis. several high spectral peaks that make people hearing disameniry are found. by contrast with theory calculating results and farther analysis. the cause that producing these spectral peaks is located
其次，介紹了二進小波分析，並應用二進小波分析實現了對透平壓縮機信號的監測分析，得到了壓縮機原始信號在不同頻率段分解的細節信號和逼近信號。用小波分析和譜分析相結合的方法對某國產電機的噪聲進行了分析，找出了人的聽閾不閱的幾個高譜峰位置，進行了空氣動力噪聲計算，通過與理論計算結果進行對比分析，進一步找出了產生該頻閩譜峰的幾個原因，第三，介紹了諧波小波和分形的基本原理。( 4 ) the mathematical expressions of statistical properties of chaotic sequences generated by chebyshev - map are derived. their statistical properties are identical with those of white noise, and they are suit to be spread - spectrum address sequences. the appropriate number of chips contained in one information bit is gained for these chaotic spread - spectrum sequences. this provides the theoretical basis for chaotic sequences as address code
（ 4 ）首次推導了chebyshev混沌映射產生混沌擴頻序列統計特性的數學表達式，得出其與白噪聲的統計特性一致，適合作為擴頻地址碼，並導出了每個信息比特所含合適的切普數。After exhaust pipe and fan system are modified, the total loudness is reduced from 11. 5 to 9. 6 sone, the fluctuation strength and sharpness are reduced. at the end of this paper, a standard of subjective and objected evaluation method of room air - conditioner is also offered
此外，在文章結尾，作者在對現有空調器進行大量噪聲測試和總結的基礎上，首次提出了《房間空氣調節器聲質量主、客觀評價規范》 ，並在生產中進行實際應用。分享友人