查询词典 noise

This article introduces the structure, principles and performance of several low-noise gear pumps, analyses that gear pump is the noise source in the new internal combustion forklift and battery forklift, provides some methods which can reduce the gear pump noise, and establishes the matching relation between gear modulus and pressure angle of the gear pump, which is applied to the new internal combustion forklift and forklift battery.

摘 要：本文介绍几种低噪声齿轮泵的结构、原理和性能，分析了新型内燃叉车和电瓶叉车中齿轮泵是噪声源，给出了可降低齿轮泵噪声的方法，建立了该种齿轮泵的齿轮摸数和压力角匹配关系，并在某新型内燃叉车和电瓶叉车上得到应用。

Based on these theories, this paper discusses the method of the design of the low noise amplifier integrated active microstrip patch antenna, which considers the low noise amplifier and the microstrip antenna and takes both mutual matching into account. The size of the active integrated antenna and the circuit configuration of the low noise amplifier are obtained at the specified operation frequency.

根据这些理论，把低噪声放大器和微带天线结合起来，并考虑两者之间的匹配，讨论了一种集成低噪声放大器的有源微带贴片天线的设计，得到了在给定工作频率下的有源集成天线尺寸和低噪声放大器的电路结构。

Ceramic bearings can produce oxidation-ho, silicon carbide, silicon nitride and so on, diameter from 3mm-50mm, precision Machinable P0, P6, P5 level; its performance characteristics are: high temperature, oil-free self-lubricating, acid, alkali and salt corrosion , wear resistance, low noise, insulating diamagnetic, since high-speed operation; metal nano-ceramic bearing its production process for a new generation of high content of nano-particles in the heat and pressure infiltration of metal surface is activated to fill the cracks and pits the metal so that 3-5 micron metal surface is more smooth solid surface, greatly reduce the friction, improve Chennai base metals, and greatly increased the life span of bearings, and its characteristics are: long life (as an ordinary stainless steel bearings 2 -- 10-fold), low noise (as an ordinary stainless steel bearings, 70%), wear-resisting, acid, alkali, salt corrosion, high temperature, load large; ceramic bearing and metal nano-ceramic bearing design and development to meet the needs of the market for high-speed, low - noise, high load, the demand for corrosion-resistant; Machinery Production Department to produce aircraft rod end joint bearing, linear guide bearings, the fuel tank of earrings, plastic bearing, non-standard side bearing components, glass door hardware, such as high-precision control products; and provide CNC machining.

陶瓷轴承可生产氧化镐、碳化硅、氮化硅等，内径从3mm-50mm，精度可加工P0、P6、P5级；其性能特点为：耐高温、无油自润滑、耐酸、碱、盐腐蚀、耐磨、低噪音、绝缘抗磁、起高速运转；金属纳米陶瓷轴承其生产工艺为新一代的高含量纳米级微粒在热和压力的作用下被激活渗入金属表面，填补金属缝隙和凹坑，使金属表面3-5微米表面更光滑坚固，大大降低其摩擦力，提高金属的奈酸碱性，并大大提高了轴承的寿命，其特性为：长寿命（为普通不锈钢轴承的2-10倍）、低噪音（为普通不锈钢轴承的70%）、耐磨、耐酸、碱、盐腐蚀、耐高温、负载大；陶瓷轴承与金属纳米陶瓷轴承的设计开发以满足市场对高转速、低噪音、高负载、耐腐蚀的需求；机械生产部以生产机杆端关节轴承、直线导轨轴承、油缸耳环、塑料轴承、非标端轴承零部件、玻璃门控五金等高精度产品；并对外提供数控加工。

Noise level tests shall be carried out in an anechoic room with background noise 20dB or less. Noise shall

噪音的测试是在背景噪音在20dB以下的消音室中进行的，在离机芯前面10cm的位置测

That is to say, the medicine effect of Astragals was longer and more stable than that of Rhodiola not only in low but also in high noise intensity. The medicine effect of Rhodiola was more stable in low noise intensity, but weaker in high noise intensity.

也就是说，黄芪的药效无论是在高强度噪声还是在低强度噪声下都比较持久、稳定，而红景天在低强度噪声下药效比较持久，在高噪声强度下的药效不如低强度。

The results showed that these contents decreased far below normal values at first as the mice were stimulated by noise; and sinbce then, gradually recovered to normal. And the effect of abdominal injection with Astragals was enhanced as the time of exposure to noise prolonged; while that of Rhodioda weakeded with higher noise intensity.

试验结果显示，大鼠受到噪声刺激后肝糖原含量起初远远低于正常值，而随着时间的延长逐渐接近正常值；腹腔注射黄芪的效果因噪声时间的延长而增强；而腹腔注射红景天的效果因强度的增加而稍有减弱。

The results showed that these contents decreased far below normal values at first as the mice were stimulated by noise; and sinbce then, gradually recovered to normal. And the effect of abdominal injection with Astragals was enhanced as the time of exposure to noise prolonged; while that of Rhodioda weakeded with higher noise intensity.

试验结果显示，大鼠受到噪声刺激后肝糖原含量起初远远低於正常值，而随著时间的延长逐渐接近正常值；腹腔注射黄芪的效果因噪声时间的延长而增强；而腹腔注射红景天效果因强度的增加而稍有减弱。

Firstly, we study the theory and application of jump points and sharp cusp points detection by wavelet transform. The studied object is from white noise to correlated noise. We have studied the properties of correlated noise in wavelet transform, and the properties of deterministic function with jumps and sharp cusps in wavelet transform.

首先研究了研究了小波变换在突变点与尖点检测中的理论与应用，研究的对象由白噪到相关噪声，研究了相关噪声在小波变换的性质，以及对具有突变点和尖点的函数在小波变换下的性质，有关这些性质，我们均以定理形式给出，并给出了详细的证明。

Large quantity of emulations show that modified MM filter which can restrain not only flat noise but also positive and negative impulse noise, is more effectively to restrain noise than traditional MM filter.

大量的仿真结果表明：改进的数学形态滤波器较传统的滤波器能更有效的抑制多种噪声，除了可以抑制加性噪声之外，还在抑制正、负脉冲噪声上具有良好的效果。

The author ever saw with one's own eyes witnesses a child of 2 years old of toddle, the noise as a result of a shoe implement bad already, she to make another shoe gives out noise, when walking exert all one's strength the chela palm of a foot to walk downward, after that calcaneal criterion basically not touchdown, generation giving a person walks one kind " one foot is deep, one base is low " impression, fortunately the author discovers in time, reminded the parent to dismantle noise plant, the pose that the child walks just transforms somewhat.

笔者曾亲眼目睹一名2岁蹒跚学步的孩子，由于一只鞋子的响声器已坏，她为了使另一只鞋子发出响声，走路时便将一只脚的前脚掌使劲往下踩，而后脚跟则基本上不着地，给人产生一种走路&一脚深，一脚浅&的印象，幸亏笔者及时发现，提醒家长拆除了响声装置，孩子走路的姿势才有所转变。

The witness also told the jury at the Royal Courts of Justice in London that he saw a paparazzo fighting with a member of the public who was trying to stop him taking pictures in the minutes before the emergency services arrived.

他还告诉在伦敦皇家法庭的陪审团，在急救服务到来之前，他当时看见一个狗仔队正和一群阻止他拍照的人打架。

The entire N／C program on a tape is made up of an accumulation of these successive data blocks.

纸带上的整个数控程序由这些连续数据单元连接而成。