The module of Zone Abnormal noise Processing ofOMEGA sps is an effective mothod of suppressing noise in Shot gather and CMPgather.②The noise of alternating current is suppressed by notching filter in theseismic data which dominating frequency is far from 50Hz.Otherwise,it issuppressed by mono-frequency noise suppression in the time domain of CGGsps;③The module of F-X Coherent Noise Suppression of OMEGA sps isa good mothod to suppress coherent noise.

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Position parameters were obtained from the simulation with the model of towed array.Based on the theory of radiated noise forming, the launch noise was simulated according to test condition in Laboratory,and the result showed the launch impulsion noise obeyed SαS distribution. The simulated noise attenuating in deep sea was analyzed with a sound loss translation model.Minimum variance distortionless response,spatially smoothed MVDR, and beam-space multiple signal classification algorithm were adopted to process the signal, hence the source level, the frequency structure and the location of the launch noise were achieved.

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Based on a series of signal process and noise source identification techniques, especially the major noise source identification methods, such as expurgation method, sound intensity analysis, spectrum analysis vibro-acoustic correlation analysis and so on, the pass-by noise control of SC7080A and SC6360B are studied in detail. By the roadway and dais experiments, the major noise and radiating parts are identified and some economical controlling methods are made. For the SC7080A, to control the emissing noise from the intake and shell vibration of air cleaner, a intake muffler is installed between the air cleaner and intake valve. Based on the theory of Helmholtz resonator, One three-parallel-connected resonant silencer is designed and trial-manufactured. For the SC6360B, the attenuation performance of exhaust muffler in high frequency region is improved. To reduce the vibration noise of shell part, the structure of oil sump tank, exhaust manifold shield and exhaust manifold shield are analyzed and improved. At the same time, some measures, such as sound absorption, sound insulation, are taken to reduce the noise of engine surface emissivity and a sound shield is designed.

本文首先綜述了目前國(guó)內(nèi)外汽車(chē)加速噪聲控制的現(xiàn)狀你懂得在线电影、主要方法和技術(shù)措施激情福利影院，在此基礎(chǔ)上，結(jié)合SC7080A和SC6350B汽車(chē)的車(chē)外加速噪聲水平及現(xiàn)狀欧州三级网址，綜合運(yùn)用分別運(yùn)行法少妇99、聲強(qiáng)法、頻譜分析法自偷自拍你懂的、聲振相干函數(shù)法等現(xiàn)代噪聲源識(shí)別方法A片在线观看网址免费不卡国产片，對(duì)SC7080A和SC6360B汽車(chē)進(jìn)行了準(zhǔn)確詳細(xì)的車(chē)外加速噪聲源識(shí)別并提出了經(jīng)濟(jì)可行的控制方案国产操B在线，針對(duì)SC7080A，主要在空氣濾清器和進(jìn)氣閥門(mén)之間的進(jìn)氣管道上加裝進(jìn)氣消聲器男人免费天堂，抑制空氣濾清器殼體表面和進(jìn)氣口兩處的噪聲輻射永久域名地址18，根據(jù)Helmholtz共振腔原理設(shè)計(jì)了三腔并聯(lián)旁支型共振消聲器，并進(jìn)行了工程化設(shè)計(jì)和試制日女人黄色网站免费看；針對(duì)SC6360B国产中文在线精品一区，主要改善了排氣消聲器在高頻段的消聲性能，對(duì)罩殼類(lèi)零件進(jìn)行了結(jié)構(gòu)改進(jìn)免费人欧美成又黄又爽的视频，降低了其表面噪聲的輻射国产精品亚洲一区二区网址，并對(duì)發(fā)動(dòng)機(jī)艙進(jìn)行了吸聲、隔聲處理三级国产三级精品网站，設(shè)計(jì)了發(fā)動(dòng)機(jī)隔聲罩91成年人在线观看。

The factors that influence the noise performance of lithium-based grease were researched,the cleanliness of grease is merely one of essential conditions to decrease noise,the particle size of lithium soap thickener is smaller,the noise performance of grease is better,and the low viscosity naphthene base oil has good effect to decrease noise,the polymer can improve lubricity and decrease noise.

研究了影響鋰基潤(rùn)滑脂噪音性能的各種因素，潤(rùn)滑脂的清潔度只是降低噪音的必要條件之一国产看视频，鋰皂稠化劑的微粒越小超碰人妻中文字幕，潤(rùn)滑脂的噪音性能越好，低粘度的環(huán)烷基油具有良好的降低噪音的效果亚洲另类欧美在线综合，高分子聚合物可以改善潤(rùn)滑性能超碰国产在线观看，降低噪音。

NB/ANL button. Pressing this button enables the built in noise reducing functions. There are: noise blanker only, both noise blanker and automatic noise limiter, and automatic noise limiter only.

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For the problem that the suppression of co-channel interference and suppression of noise can't be balanced in signal-to-jamming and noise ratio maximization method for the linear precoding of multiuser multiple-input multiple-output downlink systems, an improved scheme that the term of noise variance is modified as a piecewise linear function is proposed, in which the balance between suppression of co-channel interference and suppression of noise can still be maintained even when the noise variance is a small value through piecewise modifying the term of noise variance, and thus the bit error rate and capacity of the systems are further improved.

針對(duì)多用戶(hù)多輸入多輸出系統(tǒng)下行鏈路線(xiàn)性預(yù)編碼的信干噪比最大化方法中色欲色欲天天免费视频，共信道干擾抑制和噪聲抑制不能有效平衡的問(wèn)題，提出將其中的噪聲方差項(xiàng)修正為以噪聲方差為變量的分段線(xiàn)性函數(shù)的改進(jìn)方案色无码免费视频一区二区。該方案通過(guò)對(duì)噪聲方差項(xiàng)的分段修正久久久久久久9，在噪聲方差的值較小時(shí)依然能夠保持共信道干擾抑制和噪聲抑制間的平衡，從而使系統(tǒng)的誤比特率性能和容量得到進(jìn)一步提高日韩激情福利小说视频在线观看免费。

Circuit noise within the system: such as CRT deflection circuit power to the secondary emission of noise _ mother _ Sina fashion blog, fashion, mom, wedding photography network to provide in accordance with the relationship between noise and signal, image noise can be divided into additive and multiplicative noise two types of noise ...

系統(tǒng)內(nèi)部電路噪聲：如CRT的偏轉(zhuǎn)電路二次發(fā)射電予的噪_時(shí)尚媽媽_新浪博客JJJ无码毛片，時(shí)尚媽媽?zhuān)榧啍z影網(wǎng)提供按照噪聲和信號(hào)之間的關(guān)系，圖像噪聲可分為加性噪聲和乘性噪聲兩大類(lèi)国产亚洲日本在线观看。亚洲一区二区视频观看。。

Firstly the dissertation analyses the reason of vibration and noise of the transmission gear and the box, drawing a conclusion that the change of gear mesh rigidity and transmission error are the crucial causation to engender vibration and noise of the gear-box; the main source of the noise is the syntonic noise in box vibration and noise.

本文首先分別分析了變速箱傳動(dòng)齒輪和變速箱箱體的振動(dòng)噪聲產(chǎn)生機(jī)理哪里可以看免费的黄色网站，得知產(chǎn)生變速箱傳動(dòng)齒輪振動(dòng)噪聲的主要因素是輪齒嚙合剛度的變化和傳動(dòng)誤差的影響欧美精品一一色哟哟；且在變速箱箱體振動(dòng)噪聲中自鳴噪聲是汽車(chē)變速箱的主要噪聲源。

Due to the fact that the intercarrier spacing in OFDM is relatively small, OFDM transceivers are somewhat more sensitive to phase noise compared to single carrier transceivers. Thus this problem must be carefully considered in designing an OFDMbased system since an accurate prediction of the tolerable phase noise can allow designer to relax system specifications. According to spectrum theorem, two components of phase noise were analyzed: common phase error and intercarrier interference. On the basis of the analysis, the performance of OFDM was given for the case where phase noise has been added to the signal, and an optimal design criterion for OFDM parameters was proposed that allows to improve the phase noise error correcting capabilities in OFDM receiver.

由于采用子載波間相互正交的結(jié)構(gòu)H纯肉无遮挡3d动漫在线，OFDM系統(tǒng)對(duì)于由本地振蕩器不穩(wěn)定性所導(dǎo)致的相位噪聲影響非常敏感国产h片免费，針對(duì)公共相位誤差CPE和載波間干擾ICI兩種影響表現(xiàn)形式不同的干擾項(xiàng)99久久精神视频，從功率譜密度函數(shù)這一獨(dú)特角度分析了相位噪聲對(duì)OFDM系統(tǒng)性能的影響，提出了旨在提高接收機(jī)抵抗相位噪聲能力的OFDM系統(tǒng)關(guān)鍵參數(shù)優(yōu)化與設(shè)計(jì)準(zhǔn)則日韩精品一区二区AV免费，可在對(duì)所設(shè)計(jì)OFDM系統(tǒng)性能加以提高的同時(shí)公婬荡乱婬视频，有效降低對(duì)接收機(jī)前端模擬振蕩器件和相位噪聲抑制單元的性能指標(biāo)要求，從而降低接收機(jī)硬件實(shí)現(xiàn)成本人人操人人在线。

Content included: study on the relationship between noise and cumulative noise exposure as well as low frequency noise-induced hearing loss and high frequency noise-induced hearing loss; study on the relationship between noise sensitivity as well as LFNIHL and HFNIHL.1 Study on the relationship between noise and CNE as well as LFNIHL and HFNIHL657 data concerning workers' hearing check-up were collected including such types of work as Trial pilots and Riveters.

內(nèi)容包括：噪聲和累積噪聲劑量與語(yǔ)頻和高頻聽(tīng)力損傷關(guān)系的研究中文字幕人成乱码熟女免费；噪聲敏感與語(yǔ)頻和高頻聽(tīng)力損傷關(guān)系的研究。 1 噪聲和累積噪聲劑量與語(yǔ)頻和高頻聽(tīng)力損傷關(guān)系的研究選取成都某大型飛機(jī)制造廠(chǎng)試飛和鉚工兩個(gè)工種作業(yè)人員657名作為研究對(duì)象黑人A片特级又粗又大。其中試飛員199人(均為男性国产一区精品福利；年齡23～60歲高清一级黄色视频，平均37.36歲偷窥盗摄国产在线视频；接噪工齡1～42年，平均接噪工齡17.68年)狂野殴美激情性XXXX。