振幅

The paper presents the blasting of the surrounding rock of an underground project,and the acoustic measurement is carried out to research the cumulative damage effect of rock mass which is caused by blasting many a time.

文章基于在某地下工程围岩中多次爆破作用下岩体累积损伤效应的声波测试，对声波测试信号中的波形、振幅及波形相关性等信息随爆破次数增加的变化规律进行了分析。

The model was oscillated about its body axis with selected pitching frequency and amplitude during its continuous rotation about the wind axis.

模型在绕风速轴连续旋转的同时，进行给定频率和振幅绕体轴的俯仰振荡运动。

Two characteristics of analog carrier waves that can be altered are frequency and amplitude.

模拟载波可以改变波的两个特性：频率和振幅。

modulation is the transmission of information to be loaded onto a high-frequency signal in the process.amplitude modulation using signal to control the rate of carrier,with its linear modulation signal changes,and maintain the same carrier frequency.in the amplitude modulation,in accordance with the strength of signals in the spectrum of different components,it is divided into ordinary am (amplitude modulation standard am),with inhibition of bilateral carrier am,the carrier single sideband suppression am.the main difference is the different methods and structure of the spectrum.

摘 要：调制是将要传送的信息装载到某一高频信号上去的过程。振幅调制是用调制信号去控制载波的幅度，使其随调制信号线性变化，而保持载波的频率不变。在幅度调制中，根据已调信号的频谱分量不同，分为普通调幅、抑制载波的双边带调幅、抑制载波的单边带调幅。它们的主要区别是产生的方法和频谱结构不同。

By the use of a weighting method the ash formation distribution of coal with a wide sieve fraction can be obtained.

通常情况下，可以通过机械振筛的方法得到煤灰的粒径分布，清华大学采用 85 0℃的温度下将约 2kg的某窄筛分煤样在马福炉内静态燃烧，然后将收集的灰样在振筛机中用 2 。0mm振幅冷态振筛 5 0min的方法来研究了几种煤种的成灰特性，得到煤灰的初始粒径分布

The influence of temperature upon the normalized initial amplitude of P-wave in heavy-oil sand core can be seen at mid and low temperature.

2温度对含稠油砂样的归一化纵波初动振幅的影响主要表现在中、低温阶段；砂样的归一化剪切模量G/Gmax随T升高而线性递减。

Effect of tool rake angle on cutting vibration by experiments are done at different cutting speed in machining operation, and corresponding theoretical analysis is conducted.

对机械加工中刀具前角对切削加工振动的影响进行了系统的实验研究和相应的理论分析，结果表明：随着刀具前角增加切削加工振动的振幅逐渐减小。

Based on qualitative analysis and comparison of several options for suppressing transverse vibration on deck type steel plate girder of railway bridge,conclusions are made as follows:with static reinforcing,the vibration amplitude can be suppressed to some extent,but quasi-resonance of the bridge can not be avoided,moreover,the construction is inconvenient and costly.

通过对目前抑制铁路上承式钢板梁桥横向振动的几种方案进行定性的分析和比较，认为：静力加固方案可以使桥梁振幅有所减小，但不能避免准共振现象的发生，而且工程造价较高，施工也不方便；两桥连接方案减振效果明显(减振率近50%)，比较经济也比较方便，但同样不能避免准共振现象的发生；动力减振方案可以有效的抑制桥梁的准共振现象(现场试验中减振率达51.83%)，而且工程造价较低，施工简单、方便。

A series of sinusoids were machined on pure copper by single point diamond turning,such as sinusoids with amplitude of 10 μm and wavelength of 100 μm.

从国内外实验用靶的需求出发，采用金刚石车削技术，在紫铜表面完成了振幅为10μm、波长为100μm等一系列正弦曲线的加工。

Datong die spring selection of high stress, high-speed amplitude, excellent heat resistance SWOSC-V the same material.

大同模具弹簧选用高应力，高速振幅，耐热性优秀的SWOSC-V同等材。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。