level of noise 中文意思是什麼

level of noise 解釋
噪聲度
  • level : n 1 水平儀，水準儀；水準測量。2 水平線，水平面；水平狀態；平面，平地。3 水平，水準；水位；標準；...
  • of : OF ＝Old French 古法語。
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  1. 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。
  2. The spectrum level of microseismic noise tends to peak at about 1/6 hz.

    微震的噪聲譜在16赫趨于峰值。
  3. The noise of the micromotor is not only considered as one of reflections of environment inside of automobiles but also reflects the design technics and fitting level of the motors

    微電機噪聲是作為車內環境污染的噪聲源指標，同時也是電機設計、工藝和裝配水平的綜合反映。
  4. Shipbuilding - measurement of noise level on board vessels machinery part

    造船.船上容器
  5. According to characteristics of the seismic data from the low snr region with complex surface, this paper is started from solving the static correction problem and reasonable eliminating all kinds of disturbance in the seismic data from the low snr region with complex surface. through the whole process of seismic data processing which includes a series of processing methods that are suitable for the low snr region, namely, from the choosing of the floating base - level, the static correction in the field and indoors, the eliminating of all kinds of noise before and after stacking, the velocity analysis with high - resolution, the reasonable techniques of deconvolution before stacking and wavelet processing after stacking, to the method choosing of the high - resolution stacking and the reasonable and accurate offset imaging, a set of the complete and effective flow for processing seismic data from the low snr region with complex surface are finally formed, which can meet the need of explo

    本文針對復雜地表低信噪比地區地震資料的特點，以解決復雜地表低信噪比地區地震資料靜校正問題及合理剔除各類干擾為出發點，在整個地震資料處理過程中，從浮動基準面的選取、野外及室內靜校正、疊前疊后各類噪音的去除、高精度速度分析、合理的疊前反褶積及疊后子波處理技術、到選用高精度的疊加技術及合理準確的偏移成像方法等一系列適合於復雜地表低信噪比地區的處理方法，最終形成一套較完整且有效的針對復雜地表低信噪比地區地震資料的處理流程。
  6. Chaotic switching modulations introduce low - frequency harmonic spectrum of output voltage as random switching modulation. in some case, low - frequency noise ripple offset the effect chaotic switching modulations reduce the level of emi. it indicates that the ccfmfd integrates the advantages of spreading harmonic power at the multiples of the switching frequency and not introducing significant noise ripple at low - frequency range. among all chaotic switching modulations, the ccfmfd is considered as the best choice in applying to dc / dc converter

    與隨機調制模式相同，混沌開關調制模式也引入輸出低頻噪聲紋波，有些情況下低頻噪聲紋波可能抵消混沌開關調制降低emi水平的效果。分析表明： ccfmfd模式具有較好的降低emi水平和引入較小低頻紋波的優點，可以作為混沌調制模式較佳的選擇。
  7. A large planar microphone array, which consists of 111 microphones, was successfully applied to obtain a two - dimensional mapping of the sound sources on a landing aircraft. the focus of study in this paper is on the landing gear noise source. the spectra, directivities and sound pressure levels of flap side - edge noise of 7 narrow - board commercial aircraft and 7 wide - board commercial aircraft are presented. it is found that the landing gear noise spectrum is broadband with some single tones in some cases. the directivity of the total sound pressure level of a landing gear noise resembles that of a horizontal dipole. the level differences between the various aircraft landing gears are larger than those expected from the airspeed differences. it is thus expected that the louder noise emission of the landing gears can be reduced by redesigning

    應用由111個傳聲器組成的平面傳聲器陣列對當前流行的民用客機進場著陸過程中的機體噪聲源進行了實驗測量，本文對七架窄體客機和七架寬體客機的起落架噪聲進行了分析，得到了起落架噪聲的頻譜特性、指向特性和聲級變化.研究發現，起落架噪聲的頻譜是由寬頻隨機噪聲與一些較為明顯的單音噪聲源組成，起落架噪聲的指向性類似於一個水平放置的偶極子.不同飛機起落架噪聲的聲級相差較大，這說明可以通過重新結構設計降低起落架噪聲。
  8. ( 4 ) establish the grey model on the basis of the actual sound pressure level of 27000dwt bulk carrier superstructure cabin as a sample and extend the grey model through comparing the prediction values with the actual values, aiming to predict the noise level of superstructure cabin of 74500dwt bulk carrier and 5618teu container ship

    （ 4 ）以27000噸散裝貨船上層建築艙室噪聲的實際測量值為樣本，建立灰色預測模型，通過預測值和實測值的對比分析對模型進行推廣，並分別對74500噸散裝貨船和5618箱集裝箱船的上層建築艙室噪聲進行預測。
  9. Article 29 the unit in charge of a construction project which may produce environmental noise pollution due to the use of machines and other equipment, must report, 15 days before commencement of construction, to the competent administrative department for environmental protection of the local people ' s government at or above the county level the name of the project, the construction site, the length of time needed for completion of the project, the possible level of environmental noise and the measures taken for prevention and control of such pollution

    第二十九條在城市市區范圍內，建築施工過程中使用機械設備，可能產生環境噪聲污染的，施工單位必須在工程開工十五日以前向工程所在地縣級以上地方人民政府環境保護行政主管部門申報該工程的項目名稱、施工場所和期限、可能產生的環境噪聲值以及所採取的環境噪聲污染防治措施的情況。
  10. The main experiments : the relationship between the sonic intensity and the pressure of the steam that leak out of the boiler ; the relationship between the level of the intensity of the leak noise and the capability of boiler ; the effect that wave - guide tube has on the detection of leak noise ; the specialties of sonic intensity level of background noise and distributing in frequency

    主要實驗內容為：泄漏噪聲聲強級與泄漏蒸汽壓力之間關系；泄漏噪聲聲強級與鍋爐容量的關系；泄漏噪聲聲強級與泄漏孔徑的關系；波導管對泄漏噪聲測量的影響；爐內背景噪聲的聲強級和頻域分佈特點。
  11. Determination of sound power level for noise emitted by leather machinery

    皮革機械噪聲聲功率級的測定
  12. It is the propose of this paper to develop a method to reduce the noise level of ma60 apu without more weighting and other infection on airplane. to accomplish this object, a new type of micro perforated absorber is used

    針對新舟60飛機apu本身的結構和環境特性，我們採用一種新興的環保型消聲材料-微穿孔板為上要吸聲結構完成降噪設計。
  13. In this paper the train running noise level has been predicted with the theory of point sound source. the sound exposure level of a train set pass, equivalent continuous sound level and maximum sound level of a train set pass has been taken as estimate values, and some kinds of affixation attenuation on the course of noise propagation is considered, then the corresponding visual software has been developed. these make it convenient and precise to predict the noise level

    本文從點聲源的理論出發，對列車運行噪聲進行預測計算，採用一列車通過時的單發暴露聲級、時間特性的最大聲壓級和一定時間內的等效聲級等作為噪聲評價量，並考慮了噪聲傳播過程中的各種附加衰減，編制了相應的可視化軟體，使噪聲預測計算方便、準確。
  14. 1 noise : the greatest volume of noise normally occurs on straight sections when trains pass at their highest speed. whereas noise from mrt trains is masked by the background noise of heavy daytime traffic, at nighttime the level of noise is significantly more obvious

    （ 1 ）噪音部分：捷運直線高速行駛路段之噪音最高，因日間交通量大，道路交通噪音亦大，故捷運音量較不明顯，于夜間捷運車輛行駛之噪音則較明顯。
  15. For a long time, sr was described as a phenomenon wherein the response of a nonlinear system to a weak periodic input signal is optimized by the presence of a particular level of noise. however, this description has served to limit the application of sr to signal processing

    但是到目前為止，隨機共振在信號處理中的應用的研究還只是局限在很小的范圍內，主要原因是以前大量的研究工作都從調節噪聲強度出發。
  16. The results of the experiment show that the peak value, rms, standard deviation, crest factor, kurtosis value and impulse value of the vibration signals can distinguish between the normal and abnormal conditions of the ball bearing when the level of noise is low

    常用包絡解調技術對此類信號進行分析，但易受噪聲影響，使得齒輪或滾動軸承的故障特徵難以凸顯。本文從研究相關函數的特性入手，經理論證明，發現自相關函數並不改變調制信號的調制特徵，但具有顯著的降噪特點。
  17. 1 noise : the greatest volume of noise normally occurs on straight sections when trains pass at their highest speed. whereas noise from mrt trains is masked by the background noise of heavy daytime traffic, at nighttime the level of noise is significantly more obvious. on curved sections and cornered sections and on sections close to stations, the impact of noise on the neighborhood is much lower

    以列車行進于地下隧道段時，輪軌滾動噪音經封閉空間所傳回車廂，使乘客感受到的噪音，與列車行駛于平面、高架及出土段時，沿線非乘客感受到的移動式空傳噪音最為迫切有待解決之課題；
  18. Based on the h - h model, the thesis studies the reciprocity of random noise and signal in neuron, and the rule of the phenomenon of sr resulting from their coordinating effect. it is concluded that by the addition of certain level of noise, the response of the nonlinear system to a weak signal is enlarged. that is to say, noise strengthens the response of nonlinear system to signal

    在系統模型的基礎上，研究了隨機噪聲與信號在神經元中的相互作用，以及它們之間因協同效應而出現的隨機共振現象的變化規律，得出結論，通過加入一定的噪聲，弱信號通過非線性系統后輸出放大，噪聲增強了非線性系統的信號輸出。
  19. However, the theory of stochastic resonance ( sr ) points out that by the addition of a particular level of noise, the response of nonlinear system will be enhanced, so that strengthening the system ' s weak signal detection

    但是，隨機共振理論卻指出，通過加入一定的噪聲，能提高非線性系統的輸出能力，從而增強對該系統弱信號的檢測。
  20. The level of noise emitted by the industrial equipment in operation mentioned in the preceding paragraph shall be specified in relevant technical documents

    前款規定的工業設備運行時發出的噪聲值，應當在有關技術文件中予以註明。
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