查询词典 noise

The experiments indicated that this method could not only eliminate white noise and specking noise effectively and also reserve details on image ,its filtering effect is better than median filtering and wavelet soft thresholding method .

本文提出一种在小波域进行高斯函数滤波的去噪方法，此方法是在小波域内对高频子带分别进行高斯函数滤波，达到消噪的目的，实验表明该算法不仅能够消除高斯噪声和椒盐噪声，而且能够较好地保留影像的细节，其滤波效果优于中值滤波和小波软阈值滤波方法。

It is concluded that the noise near 500 Hz has less sthenic effect on the sympathetic nerve than those of the other noise frequencies.

通过对R-R间期的心率变异分析得知，在500Hz附近的噪声使交感神经的兴奋程度小于其他频率的噪声影响。

The commonest type of power supply noise is swishing noise.

精密混合信号电路中最好别用开关电源。

At high r/min, flow speed is high, the friction noise dominates tailpipe noise.

在高转速阶段，气流速度也比较高，这时气流摩擦噪声决定尾管噪声。

They integrate additive noise and temporally correlated information of sources to reduce noise and separate source signals.

把系统噪声的统计特性和源信号的时间相关信息综合考虑，既能有效地减少噪声的影响，又能分离出源信号。

In testing, the TCM can improve the Signal-to-Noise by 3.3dB compared with uncoded 4-VSB modulation, and with the 12 path intrasegment interleaving in TCM coding and Viterbi decoding, system can control short burst noise error efficiently.

本文在介绍ASIC芯片设计的基础上，着重介绍了信道编码中的内码的ASIC实现和性能分析。

The unflatness of amplified spontaneous emission noise and its impacts imposed on the performance of the off-center narrow filter polarization-nulling method when monitoring the in-band optical signal-to-noise ratio of dense wavelength division multiplexing system are analyzed, and a modified method by introducing an unflat factor in the calculation of OSNR is proposed.

分析了累积自发辐射噪声的非平坦特性，在已有窄带离心偏振置零法测量波分复用系统中带内光信噪比的基础上，分析该方法在噪声非平坦条件下存在的问题，提出了在光信噪比的计算中引入修正因子。

There is much noise in the state of eyes opening unforcedly, so the noise processing is necessary, the upper and lower eyelids are removed by parabola fitting, the facular is removed by neighboring gray average, the eyelashes are removed by finding all the candidate eyelashes by local gray minimum firstly, then the false eyelashes are removed by the beginning location, directional and length information of the eyelashes.

在人眼自然睁开状态下存在噪声，因此需要进行去噪操作：通过抛物线拟合的方法去除上、下眼睑；利用邻域灰度均值法去除光斑；去除眼睫毛时先用局部灰度极小值的方法找到所有候选眼睫毛点，然后利用眼睫毛的起始信息、方向信息和长度信息去除伪眼睫毛点。

To meet the needs, a novel low-noise fiber laser with compound cavity structure is designed. The stable single-mode operation is realized by using a transient self-written fiber grating, produced by the effect of saturable absorption within a section of unpumped erbium-doped fiber, as narrow band filter for mode selecting and linewidth squeezing. Through optical path modification, the spectral signal-to-noise ratio is better than 62 dB.

激光器采用复合腔结构，以掺铒光纤作为工作物质，通过在未被抽运的掺铒光纤中形成的瞬态自写入光纤光栅的窄带滤波特性进行选模和压窄线宽，产生稳定的单频激光输出；经过光路改进，激光输出光谱信噪比优于62 dB；利用光电负反馈电路，弛豫振荡峰下降了约25 dB，低频段强度噪声也大为改善，有效地抑制了光源的强度噪声。

You can see that the smooth noise is flatter, never reaching the extremes of unsmoothed noise, and the frequency appears to be roughly half.

你可以看见平滑函数，从来都没有到底那个未平滑函数的极限值，并且频率显得只有大约一半。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。