noise density 中文意思是什麼

noise density 解釋
噪聲密度
  • 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〉...
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  1. With the development of power electronics technology and devices in recent years, instead of using the industrial frequency transformer to boost voltage, dc / dc high frequency converter achieves the function. the system has higher power density and conversion efficiency, and the size, weight, ac noise of which has been greatly reduced

    近年來，隨著電力電子技術與器件的迅速發展，使用dc dc高頻變換技術代替工頻升壓，系統具有較高的功率密度與轉換效率，裝置體積、重量與交流噪聲大大減小。
  2. Present a modified particle filter ( pf ) algorithm based on the los / nlos binary state information of propagation environment using the numerical method of the probability density function ( pdf ) about the hybrid noise. the key idea is using numerical method to calculate the hybrid noise pdf, and integrating binary environment information to get filtering result

    2 .給出了應用粒子濾波器改進直達波與非直達波混合環境中移動終端跟蹤性能的新演算法，特色是利用數值方法計算混合噪聲密度函數，結合二元環境信息完成濾波估計。
  3. In determining the optimal concentration of each antibody, we have used a strategy in which the capture antibody is first immobilized at a particular density on the predetermined site of membrane, and the labeled antibody is then varied to retain a maximum signal - to - noise ratio

    在測定每個抗體的最佳濃度中，我們用到了這樣一個方案：先將捕獲抗體以特定的濃度固定在膜上預留的部位，然後改變標記抗體濃度得到最大的信號噪音比例。
  4. By solving the stochastic differential equations describing the noise performance of the cmos gilbert mixer, the time - varying power spectral density of its output noise at high frequencies is given

    通過求解描述cmosgilbert型混頻器噪聲性能的隨機微分方程，本文給出了該類型混頻器高頻輸出噪聲的時變功率譜密度。
  5. In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector

    在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。
  6. 2. virtual technology in this section, firstly, introduce virtual instrument development and analyze the main principles in tractor testing projects ( including shaft mass, left - and - right side trigging forces, smoke density, noise and velocity ). secondly, propose a general design combined multifunction data acquisition devices ( daq ) with lab view diagram language

    （ 2 ）虛擬儀器技術介紹了虛擬儀器的發展特點，分析了拖拉機主要的檢測項目（軸重、左右制動力、煙度、噪聲、速度）的檢測原理和手段，提出一套基於多功能數據採集卡daq和圖形化編程語言labview的虛擬儀器構建方案。
  7. Simultatly, based on the vaviaction of seismic signal - noise ratio, the anthor use the funtion singular method in the seismic data procesy and put forward the wavelet amplitude singular exponentid method and the wavelet power spectrum singular exponential for the fractued density detection

    與此同時，將函數奇異性分析的思想引到地震信號處理中來，針對地震信號信噪比的高低，提出小波振幅奇異性指數法和小波功率譜奇異性指數法的裂縫密度檢測方法。
  8. Effects of axial magnetic field on density and voltage noise of vacuum arc charged particle

    縱向磁場對電弧帶電粒子密度和電壓噪聲的影響
  9. The cumulative probability distribution ( cpd ) and probability density function ( pdf ) of the magnitude of signals with noise are approximated by the cumulate percentage distribution ( cpd ) and percentage density ( pcd ) respectively by sorting and discretizing. the simulation verfies the following

    含噪訊號強度之累積機率分佈及機率密度特性，則依強度遞增排序法，換算成累積百分比分佈及百分比密度近似之。
  10. Therefore, the noise such as crystal scattering due to long exposure time can be suppressed, and storage capability and fidelity can be improved. the high - density holographic storage system, including on - line and off - line heating units, has been designed and implemented for our experiments

    研製了包括在線與離線小型精密溫控加熱裝置、晶體夾持器和角度? ?分維復用光學讀寫系統等主要部分的高密度全息存儲的熱固定系統，該系統操作靈活並具有實用性，其存儲能力不少於10000幅全息圖。
  11. Phase noise power spectrum density

    相位躁聲功率頻密度
  12. In the end of this chapter, the power spectrum density ( psd ) analysis of hrg is given, which shows that the main noise of hrg is low frequency noise

    論文還對陀螺信號進行了功率譜密度分析，分析結果表明陀螺的主要誤差都集中在低頻段。
  13. The accelerometer which has simple fabricated process and high sensitivity and small parasitic capacitance and residual stress is hybrid integrated with the interface circuit using ic nude chip. so the density of the package is increased, and the noise of the sensing system is decreased. these found the base of capacitive accelerometer module using the mcm method

    該傳感器製作工藝簡單，靈敏度高，支撐梁採用u型，減小了刻蝕后的殘余應力，用玻璃作為襯底，減小了襯底和硅可動質量塊間的寄生電容，且把傳感器晶元和用ic裸片製作的介面電路集成在一起，提高了封裝密度，減小了傳感器系統的噪聲，為採用mcm技術製作電容式加速度傳感器模塊打下了基礎。
  14. Flicker noise is approximately simulated by power law model of phase noise spectral density

    根據相位噪聲功率譜的冪律模型，近似地模擬了相位噪聲。
  15. The optimized experimental conditions are determined and the densities of some elements in the mental alloy standard samples are measured. the experimental results shows that the spectral intensity of the plasma enhances significantly with the increase of the operating voltage and the power density. ( 1 ) to the steel ally sample, the emission intensities of the spectra reach to the maximum values when the laser operating voltage is 1600v and the argon pressure is 600 torr. under the same pressure, the spectral intensity of the plasma in the argon atmosphere is stronger than that in the air. when the argon pressure is 320 to rr, the signal - noise ration is about 5 times than that which the argon pressure is 700 torr, but the temperature of plasma is less about 1000k

    （ 1 ）對于光譜標鋼準樣品，當激光器工作電壓為1600v 、氬氣壓力為600乇時，譜線強度達到最大，並且在相同壓強下，氬氣中的等離子體與空氣中的等離子體相比，其輻射強度明顯增強；氬氣壓力為320乇時的譜線信背比約為600乇條件下的5倍，而等離子體溫度卻下降了近1000k ，即等離子體溫度隨環境氣壓的增大而增大；當激光束的焦斑在樣品表面上下移動時，激光誘導量、等離子體的激發溫度、譜線強度都呈不對稱性分佈，其最大值對應的焦斑位置都位於樣品表面之下0 . 4mm左右。
  16. Choose a suitable location for density residential blocks to minimise the negative visual, noise and air quality impacts

    地點高密度住宅大廈的選址，應該以盡量不造成負面的視覺、噪音和空氣質素影響為佳。
  17. But when concerned with higher magneto - optical recording density, the kerr angle become smaller at shorter wavelength than at longer wavelength result from recoding and reading the memory information by shorter wavelength semiconductor laser tube. further more the signal - to - noise of recording information lowers and brings difficulty for the reading

    但在更高密度磁光記錄方面，由於信息記錄與讀出採用短波長半導體激光管，磁光記錄材料的克爾旋轉角比長波長時小，導致記錄信息的信噪比下降，給信息讀出帶來困難，為此將對材料進行改性。
  18. Taking the fourier transform of this windowed ccf produces the time - domain filtered cross spectral density ( tdfcsd ). the snr can be improved with using the character of noise which distribute uniformly in frequency domain

    再進行傅立葉變換產生時域濾波互相關譜密度（ tdfcsd ） ，利用噪聲在頻域中均勻分佈的特性使snr得到改善。
  19. The prototype test results indicate : voltage mode and current mode ac - ac mode ac / ac converters with high frequency link have the advantages such as high frequency electrical isolation. simple topology, two - stage power conversions, high power density, bidirectional power flow, good line current waveform, no audio noise, high converting efficiency, and high input power factor etc. this kind of converter lay the key technical foundation on new type regulated sinusoidal ac power supply, electronic transformer, ac regulator, and wave converter etc

    試驗表明，這類變換器具有高頻電氣隔離、電路拓撲簡潔、兩級功率變換（ lfac hfac lfac ） 、功率密度高、雙向功率流、無音頻噪音、變換效率高、網側功率因數高等優點。為新一代正弦交流穩壓器、電子變壓器、交流調壓器、同頻波形變換器的實現奠定了關鍵技術基礎。
  20. ( 4 ) analysis of item illustrate that, during the 19 influencing factors, the influences of post facilities maturity, atmosphere noise pollution condition, geologic and physiognomy condition, flood submerge condition and programming qualification have no difference in regions on business land price, the influence of green - belt park and geologic and physiognomy condition have no difference in regions on residence land price, the influence of rout net density and post facilities maturity have no difference in regions on industry land price

    項目分析說明， 19個影響宜賓市城區地價的因子中，郵政設施完備度，大氣噪聲污染狀況，地質地貌條件，洪水淹沒狀況，規劃條件這5個因子對商業用地地價的影響沒有區域差異；綠地公園影響度，地質地貌條件這2個因子對住宅用地地價的影響沒有區域差異；路網密度，郵政設施完備度、洪水淹沒狀況這3個因子對工業用地地價的影響沒有區域差異。
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