利用近50年的系统定位观测资料，分析红松果材兼用林不同林分密度与直径、树高、冠幅等主要测树因子的关系。
By using observation data over 50 years, the paper systematically analyzed the relations of different stand density with diameter, height, crown of trees and so on.
讨论了脉冲激励幅值以及系统阻尼等对冲击谱的影响规律。
The regular pattern of influence on impact spectra by amplitude of pulse excitation and system damping was discussed.
运用数字滤波、傅立叶变换，以及幅值分析和基于神经网络的专家系统等方法对信号进行监测和诊断。
In the structured system, signals are proceeded by low-pass filter, Fourier Trans form, range analyzing and expert system based on Neural Network.
针对旁瓣电平、波束指向等指标分析了幅相误差对数字波束形成系统的影响。
This paper analyzes the effect of amplitude phase errors on sidelobe level and beam direction in digital beam forming system.
给出了当输入信号为等概率的四进制脉冲幅值调制（PAM）时，系统输出理论渐近误码率计算公式。
Furthermore, the expression of stationary bit error rate of system output corresponding to equiprobability quaternary pulse amplitude modulation (PAM) input signals was deduced.
分析了LCLV驱动信号的电压幅值、频率、占空比以及屏幕照度等诸多因素对投影系统对比度特性的影响。
The effects on the contrast of the LCLV projecting system, such as the LCLV driving signal voltage, frequency, duty cycle and the display screen illumination were analyzed.
系统采用直接数字合成（DDS）技术构建正弦波发生器，实现幅值、频率、相位等连续调节；
The system adopts direct digital synthetic (DDS) technology for building the sine wave generator to realize continuous regulation of amplitude, frequency and phase modulation.
采用雷电综合定位系统，可精确测出雷电发生的时间、地点、雷电流幅值等雷电参数。
By the combined lightning locating system, the time, the position, the amplitude of lightning current, the parameters of lightning, etc, can be precisely measured.
由变幅杆大端直径、放大倍数、面积系数等已知条件，按照变幅杆设计理论对超声振动系统中的变幅杆进行设计；
According to the designing theory of amplitude amplifier pole, it could be designed by big end diameter, magnification, area index and other parameters.
正是有这一相位差，才使强迫力对振动系统所做的功正好抵消阻尼力对振动系统所做的负功，以保证稳定振动的等幅性。
This leads to the result that the work of force counteracts the work of damp force, and that the swing of steadily oscillation is the same.
通过系统响应的时域波形图、幅值谱图、相轨迹图，分析了曲轴轴系的周期、拟周期、混沌等复杂的非线性动力学现象。
The effects of nonlinear damp and rotational speeds on response characteristics of crankshaft system of diesel engine were studied by using numerical integral method.
针对细胞微超声振动切割系统对超声变幅杆的要求，将等截面圆柱形阶梯变幅杆的一端替换成圆锥形变幅杆构成一种复合圆锥阶梯形变幅杆。
By studying ultrasonic amplitude transformers to meet the requirements of an ultrasonic vibration cell cutting system, a new compound cone step type amplitude transformer is constructed.
该系统可对石英摆片的摆幅、摆频、扭幅、扭频、台阶高度和挠性梁刚度等实现自动测量。
This system can be used to measure the quartz pendulous reed's pendulous frequency, pendulous amplitude, torsional frequency, torsional amplitude, flexible bridge rigid, and so on.
系统由超声波驱动器、换能器、变幅杆、拉丝模、拉伸机等组成，通过对黄铜丝的拉拔实验，考察了超声振动对拉拔力和丝的表面质量的影响。
Through a series of drawing experiments of brass wires, the effects of ultrasonic vibration on drawing force and surface quality of the wires were discussed.
研究表明：无量纲脉冲激励幅值、无量纲脉冲激励周期、系统支承角及阻尼等对系统响应峰值影响显著。
It was concluded that the effects of peak pulse acceleration, pulse duration, Angle of tilted support spring and damping ratio of the system are particularly noticeable.
完成了系统控制软件和FPGA控制逻辑设计，实现了幅频和相频测试，参数存储，Q值计算等数据处理功能。
It completes the system control software and FPGA control logic design, and achieves the data-processing function of amplitude and phase-frequency testing, parameter storage, calculation of Q-value.
根据果粮间作生态系统的光照分布规律可以确定合理的栽植方式和合理的树形、树高、冠幅等指标。
According to the light distribution law of the fruit-crop planting ecosystem the reasonable planting way and the reasonable shape of tree, the height of tree, the range of crown and other index ca...
根据果粮间作生态系统的光照分布规律可以确定合理的栽植方式和合理的树形、树高、冠幅等指标。
According to the light distribution law of the fruit-crop planting ecosystem the reasonable planting way and the reasonable shape of tree, the height of tree, the range of crown and other index ca...
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