查询词典 noise

The analysis of 3D noise indicates that the measurement is effective. Two MRC models of ICCD imaging system has been established based on system performance of energy and modulation transfer whose target is three-bar. One MRC model is under the condition of standard A lamp, and the other is under the condition of night photo-spectrum. Because the MRC models integrate sensitivity, noise, target spatial frequency, MTF and the performance of human eye all together, the MRC models can evaluate limit performance of photoelectric imaging system more roundly.

在系统能量传递特性和调制传递特性的基础上，以三条带图案为研究对象，从信号转换的角度出发，围绕每景象立体弧度角中ICCD的电子通量，建立了基于量子噪声和CCD噪声特性的微光ICCD成像系统MRC模型，MRC模型综合了系统灵敏度和噪声、目标空间频率、系统调制传递特性以及人眼视觉特性等因素，能更全面地反映光电成像系统的极限性能。

In this paper, we present a low phase-noise oscillator circuit. The circuit of an inductor-capacitor tank oscillator is made on the chip. The 0.25μm complementary metal-oxide-semiconductor process parameter of Taiwan Semiconductor Manufacturing Company are entered into Advanced Design System software to simulate an LC tank oscillator circuit. Some circuit technology and an improved method for phasing noise are introduced.

此文提出一个低相位杂讯振荡电路，这电路完全实现於晶片上的电感电容压控振荡器，我们是把台湾积体电路的0.25μm的CMOS（互补式金属氧化物半导体）制程参数放入Advanced Design System模拟软体中模拟，在本文中我们介绍了一些电路技术和改善相位杂讯的方法。

Power parts: motor 0.8 kilowatts,(the most energy-efficient textile machinery) Use of floor type, in the past motor installed in the wall due to power large central power-particularly prone to vibration force, causing a long time in different parts of the rack screws loose, resulting in glitches and instability caused by take-wai (3) Weft parts: the reference to a high-speed rapier looms used Chuanjian round, narrow tracks, narrow sword belt, reducing machine noise, so that the warp to reduce significantly reduced contact surface the warp yarn breakage improved product quality and quantity; and reducing machine noise below 70 decibels more than the requirements of the State Environmental Protection 100 decibels.

动力部分：电机0.8千瓦，采用落地式，以往电机装在墙板中部开机时由于动力较大特别容易产生振动力，时间长造成了机架各部位螺丝松动，产生小故障且造成接纬不稳定（3）引纬部分：引用了高速剑杆机采用的传剑轮，窄轨道，窄剑带，降低了整机噪音，使经纱接触面减少明显减少了经纱断头提高了产品质量和数量；且降低了整机噪音70分贝以下超过国家环保100分贝的要求。

The cause of main steam valve noise is determined through analysis of noise creating mechanism.

通过对噪声产生机理的分析，确定了主蒸汽阀噪声的生成原因，介绍了几种降噪措施及其效果，对电厂管道设计和阀门选型具有借鉴意义。

In this paper, motion model of star spot which is combined with the effect of CCD noise has been established. The centroid accuracy of the star spot affected by sub-pixels arithmetic and CCD noise were analyzed at different exposure time with CCD47-20 chip, and the optimum exposure time was calculated.

建立星敏感器星点像移模型和CCD噪声影响模型，分析了星点质心定位精度与曝光时间的关系，并以CCD47-20为例，对星敏感器的曝光时间进行了优化。

The effects of the noise source and its direction of Chinese speech average frequency spectrum on the intelligibility of Chinese speech were discussed in different room acoustical characteristics and signal-to-noise ratio conditions.

在不同室内声学特性、不同信噪比条件下探讨汉语语言平均频谱干扰噪声及其方向对汉语语言清晰度的影响。

In this model, the noise field in sound shadow region is deduced by applying Huygens-Fresnel principle. It provides a new ideal for deducing the diffraction sound of complicated noise source.

模型中对声影区的声场分布采用惠更斯-菲涅耳原理进行推导计算，给出的理论计算公式可为推导计算其它复杂声源的衍射声提供借鉴。

Study of long-term residents in the vicinity of the airport, flight movements during sleep prone to the effects of noise, noise, if more than 35 db, the rapid rise in blood pressure will lead to long-term health risks associated with, the higher the risk of suffering from high blood pressure.

研究表示，长期居住在机场附近的居民，睡眠时易受航班升降噪音的影响，噪音若超过35分贝，会令血压急速上升，长期会危害健康，患高血压的风险较高。

Because a noise signal on one wire will appear identically on the other wire, this noise be easily detected and filtered at the receiver.

而一条线的杂讯将同样地出现在另一条线上，因此杂讯容易被接收器侦察并过滤。

A low complexity detection scheme for the MIMO system with distributed transmit antennas is presented. Based on a Sorted CHolesky Decomposition, the additive gaussian color noise after match filter is whitened; The detection sequence according to the post signal noise ratio is reordered, and the risk of error propagation is degraded. The whole algorithm only requires one matrix inverse.

摘要针对发射天线分布的MIMO信号，基于排序的乔列斯基分解过程(Sorted CHolesky Decomposition，SCHD)，将匹配滤波后的加性高斯色噪声转化成加性高斯白噪声，根据后验信噪比对发射信号检测顺序进行重排，降低了误差传播的影响，该算法仅需一次矩阵求逆操作。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。