查询词典 noise-signal ratio

The mechanism of the OGFC pavement functions is fully analyzed, with a description of the mix ratio design and raw material selection, including the function and features of permeability, antiskid , noise reduction, temperature reduction, etc.

全面分析了OGFC路面的功能与作用的机理，介绍了OGFC配合比设计和原材料选择，分析了透水性、抗滑性、降噪性和降温性等功能和特点，最后也分析了耐久性差、生产成本高、维护成本高等不足。

Has obtained the good compression ratio and the peak value noise ratio.

获得了较好的压缩比和峰值噪声比。

The objective parameters, including fundamental frequency, Jitter , Shimmer, Harmonic to noise ratio, Normalized noise energy, and maximum phonatory time which were measured mainly on a sustained /i:/ with the Dr.

嗓音的客观检测：以/i：/音为样本，进行声学测试，测Jitter、Shimmer、Fo、NNE、HNR。测出MPT。结果(：1)嗓音的主观评价：总嘶哑度G在不同疾病组间有显著的差异(p.01)；除声带小结/声带息肉组间不能区分外，VHI-10在不同分组间有显著差异。

This instrument can meter the electric level, frequency spectrum, carry to noise ratio , A/V , cobbly ratio , voltage s of the AC trunk line and the battery.

该场强仪可以对有线电视系统的电平、频谱、载噪比、A／V比、系统不平度、交流干线和电池电压等进行测量，并通过液晶显示，结果保存于EPROM中。

The performance of the method is saliently improved in eliminating the noise and preserving the edge of the image when the noise ratio is high.

对不同类型、受不同强度噪声污染图像的去噪实验表明，该方法在不同噪声率下均优于传统的中值滤波法及其一些改进算法，当噪声率较大时其去噪和保边性能得到了显著提高。

This research main of research the content aim at the system noise of the orbit conveyance namely it become grind to judge because of carrying on, and through analysis valuation, the draw-up derails the prevention and cure counterplan of orbit noise, and to part prevention and cure the result measurement of counterplan do an initial analysis ratio to, distinguish a counterplan and become because of theoretically and the result ratio on the actual situation to with provide the best project of noise prevention and cure.

本研究主要的研究内容即针对轨道运输系统噪音之成因进行研判，并经分析评估，拟定出轨轨道噪音的防治对策，并对部分防治对策的结果量测做一初步分析比对，厘清对策与成因在理论上及实务上之成效比对，以提供噪音防治之最佳方案。

Catalyst dosage ,the particle diameter of catalyst and the opening ratio of the opening piece are to be experimented and analyzed according to the three items of purity of exhaust purifying box .Exhaust muffler and oil consumption .The relationship between the paramefers and exhaust parity exhaust noise and the oil consmption ratio is analyzed the effecting degrie.

针对尾气净化消声器的净化、消声及油耗三项指标，选取了催化剂用量、催化剂的颗粒直径、开孔板的开孔率三个主要影响因素进行了正交试验和分析，探讨了这些参数和尾气净化、排气噪声、油耗率之间的关系及其影响程度。

According to the acoustic model of piston slap noise, how the parameters affect the piston slap noise at different rotate speed was discussed. And those parameters were piston clearance, piston pin offset, connect rod ratio, piston skirt stiffness, crank shaft offset, height of piston's gravity center, total length of piston skirt, vertical position of piston-pin axis and under part length of piston skirt.

借助建立的活塞拍击噪声理论声学模型，深入探讨了配缸间隙、活塞销偏移量、连杆比、活塞裙部刚度、曲轴轴线偏移量、活塞质心高度、活塞裙部总长度、活塞销轴线竖直方向位置和活塞裙部下段长度等主要影响参数在不同的转速下对活塞拍击噪声的影响规律，初步总结出活塞低拍击噪声设计和改进的基本规律。

The pressure ratio corresponding to the switch of the two-stage increased with the increase of nozzle-to-plate distance. A formula was constructed to describe the dependence of the noise on the pressure ratio.

发现远场噪声随喷嘴压比的增加表现出两阶段的规律，两阶段切换所对应的压比随冲击距离的增加而增高，并初步建立了噪声与压比关系的表达式。

The wave-front detection technique can amplify the variations of the wave-front of the debris flow. The debris flow becomes easy to discriminate. Based on the clean images processing, the detection ratio of the multiple filtering technique can increases from 56.36% to 95.27%. The noise removal technique can effective remove the pepper-and-salt noise and Gaussian noise. The clean images will reduce the false alarm rate for detection of remaining ratio technique.

土石流波前判识」使用前处理影像，可有效的将土石流波前扰动强度放大，较易正确判识出土石流波前；「多重滤波判识」经影像前处理后，可降低因环境带来的不当讯息，结果发现，其判识率由56.36%大幅提升至95.27%；「溪床特定物残留率」判识时，易将杂讯视为特定物，滤除杂讯可有效降低误判之机率。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。