This study includes two aspects: At the one hand, two types of mental EEG signal, one was collected during a fixed frequency sinusoidally modulated light stimulation and the other was collected without photic stimulation, have been studied contrastively to explore the possibility of different mental task EEG bringing with different rhythm assimilation response under the same frequency SML stimulation. The study results show that the oscillation of the rhythm corresponding to the stimulation frequency appeared in mental EEG during fixed frequency SML stimulation. The amplitude of the rhythm oscillation didn't descend with stimulation time and different mental EEG showed different rhythm assimilation effect at the same electrode position and a mental EEG showed different rhythm assimilation characteristics at different positions.
内容包括：(1)在大脑进行不同类型的思维作业时给予同一频率的正弦调制光刺激和不给予任何光刺激两种情况下分别采集思维EEG信号，通过对它们的对比分析，研究在固定频率SML刺激下，不同思维作业EEG信号产生不同节律同化效应的可能性；(2)对受试者进行一段时间的不同思维作业给予不同频率SML刺激的节律同化训练，通过对训练前、训练后采集到的思维脑电信号的对比分析，研究节律同化训练使不同思维脑电信号携带有与刺激频率相关的节律同化信息的可行性及节律同化效应的稳定性。
Amplitude-modulated screening dot is ordered, depending on the size of the dot to change business card printing and membership card making inking, FM screening dot size fixed, the distance between nodes can vary, depending on the distance and dot dot of regulation business card printing and membership card in the amount of ink on paper, color changes.
调幅加网的网点是规则排列，依靠网点的大小来改变制卡和会员卡制作墨量的大小，而调频加网的网点大小固定不变，网点间的距离可以变化，依靠网点距离和网点数量的变化调节制卡和会员卡制作在纸上的墨量，实现颜色的变化。
Methods The fixed electrode array that can conquer the problem of unequal distance and inconvenient arrangement of the electrode in CEIT was used in the OEIT. The direct digit synthesis was employed by measuring system to produce the exciting signal, and FPGA and ADC were developed to realize digital phase-sensitive wave detecting and obtain the voltage amplitude and phase of the electrodes. Finally, the conductivity image distribution was given by computation according to numerical algorithm.
开放式电阻抗成像采用固定电极阵列，克服了封闭式电阻抗成像在应用上电极间隔不等、放置不方便等问题；测量系统采用直接数字频率合成产生激励信号，采用FPGA与ADC实现数字相敏检波，检测出电极间的正弦电压幅值与相位，经成像算法得到试验图像。
When regulated discharge is fixed, amplitude of water level is response with section shape.
当调节流量一定，断面形状对水位变幅起主要作用。
The quantificational correlations between summer and winter monsoon intensity reflected by annual monsoon amplitude were the fixed proxy of monsoon variations of dry and humid.
季风年变幅反映的夏季风与冬季风强度的定量组合关系，是季风气候干湿变化的定量代用指标。
It was found that, under fixed frequency and strain amplitude, the phase separation exhibited anisotropy and periodicity.
在特定的振荡频率和应变振幅条件下，共混物的相分离具有显著的周期特性和各向异性。
This can be achieved by modulating the ink pressure in a sinusoidal way at fixed frequency and amplitude, or by modulating the ink velocity relative to the nozzle.
或者通过调节油墨的相对喷头的速度。
These are oscillations of fixed amplitude and frequency which can be sustained in the feedback loop even if the system input is zero.
其振荡以固定的幅值和频率在反馈环中维持即使系统的输入为零。
The testing results indicate that the tracking characteristic of the filter is excellent, the center frequency is determined by the frequency of switching control pulse, and the tracking filter is a favorable linear band-pass filter with fixed quality factor Q-value and amplitude gain.
试验结果表明：开关电容窄带跟踪滤波器有良好的跟踪特性，其中心频率由开关控制脉冲频率确定，是一种恒品质因素和恒定幅值增益的带通滤波器，具有良好的线性度。
Detailedly studies the principle of unbalance measure, the relationship between amplitude, phase and unbalance, fixed coordinate component, balance precision and the demands for remaining unbalance.
详细研究了动平衡机不平衡量的测量原理，包括不平衡量与振幅、相位的关系，平面分离的解算标定方法，以及平衡精度，对剩余不平衡量的要求等。
On the basis of the analysis of various factors affecting the precision of amplitude modulation measurement circuit of inductance sensor, it is presented that improving its precision by using digital synthesizing, self fixed amplitude, digital phase sensitivity detection, digital set average technique and so on.
在分析影响调幅式传感器测量电路精度因素的基础上，提出利用数字合成技术、自稳幅技术、数字式相敏检波技术、数字集合平均技术等措施，来改善调幅式传感器测量电路的检测精度。
To deal with filter value calculation instability, people put forward and carry out lots of methods in practice such as self-adaptive filter, fixed amplitude filter and square root filter, etc.
为了解决滤波器数值计算不稳定问题，实践中提出并应用了许多方法，如自适应滤波、固定增益滤波、平方根滤波等。
For fixed damping and fixed excited frequency the motion of the beam under small amplitude of force is periodic, but becomes chaotic through period doubling bifurcation with increase of the force.
对固定的参数激励频率和阻尼，当参数激励幅值较小时梁的运动是周期的，但大幅值激励会使运动通过倍周期分岔变为混沌。
Based on the test results found hydraulic mount in different amplitude excitation energy storage dynamic stiffness of the fixed point curve clusters, and the test curve based on the parameter identification method to mount model parameters identification.
在试验的基础上发现了液压悬置在不同幅值激励下储能动刚度曲线簇的不动点，并用基于试验曲线的参数识别方法对悬置模型参数进行识别。
The studying results show that the classical elastic wave equation of spherical wave is only true for fixed amplitude phase and described only kinematic equation of phase velocity.
研究揭示经典的球面波波动方程只对固定振幅相成立，即只描述了相的运动方程，其波速为相速度。
The results of the experiment show that the vibration amplitude of the stator matches the detected signal under the fixed frequency. And the temperature signal and vibration signal is successfully separated.
初步实验研究表明：在固定的频率下，检测振动振幅与振动信号特性吻合得很好，而且成功的将振动信号和温度信号分离。
Voltage data within a fixed width window are used to estimate the amplitude and phase of the fundamental component.
该方法使用一固定宽度窗口内的电网电压数据来估算其基波分量的幅值和相位。
The frequency of this smoothed waveform is fixed, the amplitude is unique, and the frequency band performance is good.
这种平滑化的波形频率固定，幅度统一，具有较好的频带性能。
Their pulse amplitude, frequency, duty cycle can be adjusted output fixed frequency, duty cycle stimulus wave, better able to avoid the phenomenon of electro-acupuncture tolerance.
其次δ波和θ波的脉冲幅度、频率、占空比均可调，可输出频率、占空比可变的刺激波，能更好的避免产生电针耐受现象。
The PRFM pulse sequence is composed by 16 fixed-width and fixed-amplitude short pulses, in which the duration between two neighboring pulses is determined by pseudo-random number sequence.
此序列由16个固定宽度的高电平脉冲组成，两个相邻脉冲之间的低电平时间间隔是由伪随机数序列决定的。