The characteristics of EEG change showed numerous or single slow spikes of high amplitude on the centrotemporal area under the background of the normal activity of the children. 脑电图背景活动正常,中央-中颞区出现成串或单一的高波幅的棘波,可局限于一侧半球,也可从一侧半球转移至对侧半球。
Compared with union inversion of amplitude and phase, similar results can be obtained with the single inversion of amplitude or phase. 与使用复电阻率幅值和相位的联合反演相比,单独考虑幅值或者相位的反演也能够取得相近的效果。
Single Sideband Amplitude Modulation Based on Complex Filtering in Military Software Radio 军用软件无线电中基于复数滤波的单边带调制
The erbium doped fiber amplifier ( EDFA) gain flattening filters were fabricated by writing long period gratings in hydrogen loaded standard single mode fibers using amplitude masks and a properly designed program controlled scanning exposure system. 采用幅度掩模和程控扫描曝光技术在经过氢载敏化处理的普通单模光纤上研制出了可用于实现掺铒光纤放大器增益谱平坦化的长周期光纤光栅器件。
The anomaly at a single point showed characteristics of short time and small amplitude. 单点异常变化持续时间短、幅度小等特点。
The application of single access self-capacity factor spectrum analysis and amplitude value spectrum analysis is to confirm the natural frequency and size the response of the bow system. 单通道幅值谱分析、自功率谱分析的应用主要在于确定系统的固有频率和响应的大小。
The influences of mean diameter, distribution and relative refractive index of the particles of the uppermost layer on the single backscattering spectra curve and its amplitude of wave components of different orders are further studied by Fourier waveform analysis method. 并用傅里叶波形分析法研究了这些参量对单次后向散射光谱曲线形状及其谐波幅值的影响。
Amplitude modulator is a committed step in the signal processing, it has determined to output working efficiency and quality of the launcher directly. Adoptable amplitude modulate scheme have double sideband amplitude modulator, single sideband amplitude modulator and quadrature amplitude modulator etc. 振幅调制是信号处理中的关键步骤,它直接决定了输出发射器的工作效率和质量,可采用的振幅调制方案有双边带振幅调制、单边带振幅调制以及正交振幅调制等。
This paper describes the formation of ultrashort laser pulse train and the switching cut of ultrashort laser single pulse with the high speed triggering circuit and amplitude control. 本文介绍了激光超短脉冲列的产生和用高速触发电路和幅度控制来选取激光超短单脉冲。
Single Small Amplitude Pulse Modulation of the Laser Diode 对半导体激光光源实现微弱幅度的单脉冲调制
In this paper, using the Goodman diagram such two-dimensional distributive variables may be represented by a single parameter-variable, i.e. an equivalent stress amplitude under the indicated mean stress. 本文运用Goodman图将这种两维分布的变量用单参数表达,该单参数是指定平均应力下的等效应力幅值。
A calculation for period of a single freedom nonlinear conservative system vibrating in a large amplitude is performed, and the period formulae of some typical vibration problems are presented. 简要介绍了单自由度非线性保守系统作大振幅振动时周期的计算方法,并给出了几个常见典型振动问题的周期公式。
The six parameters of single trail alpha wave are computed and analyzed: pre-stimulus amplitude and phase angle, post-stimulus amplitude and latency of first positive and negative peak. 计算每次刺激前的幅度(Pr)、相位(φ),和刺激后的第一个正(P)波和第一个负(N)波的潜伏期与幅度共6个参数。
The method has good decomposing ability for a single wave, can provide three kinds of shows such as amplitude spectrum, energy curves and PRONY filtered sections, having a strong QC tools. 此方法对单波有很好的分解能力,能提供振幅谱、能量曲线及PRONY滤波剖面等三类显示,并具有较强的质控手段。
Design a new method to obtain pulse amplitude in real time pulse processing, realize the single parameter amplitude analysis of positive-negative double polarity pulse, realize real time display of double 2048 channels spectrum. 在实时脉冲信号获取处理上,设计了新的脉冲幅度提取方法,实现了对正负双极性脉冲的单参数幅度分析,实现了双2048道谱数据的实时显示。
It consists of a multiwire proportional chamber, a delay line, a main amplifier, a timing single channel amplitude analyser and a time to amplitude converter. 它由多丝室、延迟线、主放大器、定时单道以及时幅变换器等组成。
The detector consists of a single chip microprocessor to measure the amplitude and frequency of an oscillator. 锚杆探测仪采用单片机测量振荡器的振幅和频率,控制振荡器振幅和发光二极管的指示。
However, in the single motion mode, the factors such as velocity of movement, amplitude of movement, and position of the arm remain unclear. 但是,在单个运动模式中,假肢的运动状态如运动速度、运动幅度和手臂位置等却无法控制。
The dynamic rigidity mechanism is obtained by discussing the effect of rotational speed of single connecting rod elastic arm on frequency and amplitude on the basis of dynamic model. 以单连杆弹性臂动力学模型为基础讨论转速对频率、振幅的影响,得出了动力刚化的机理,并对其是否考虑动力刚化效应时进行了数值仿真比较与分析。
Objective To investigate whether there are any differences in auditory steady state responses to single or simultaneously multiple sinusoidally amplitude modulated tones stimuli. 目的了解单频与多频同时刺激方式的多频稳态反应阈值是否有差异。
Single sideband amplitude modulation is the major model of the military software radio. 单边带调制是军用软件无线电中的主要调制方式之一。
The oscillator is achieved by a single capacitor and comparator. The amplitude of output signal does not change when the reference voltage changes. The oscillator has small occupied area and ease of integration. 其中的振荡器采用单一电容和比较器实现,输出信号振幅不随参考电压的改变而改变,占用面积小,便于集成。
The process of formula starts from the model of a single signal to get the amplitude, frequency and phase angle of single cosine signal, then extends to the general complicated signal, using Newton-Raphson to solve the equations. 公式推导的过程先从简单的单信号模型入手,得到单个余弦信号的幅值、频率和相角,再推广到一般情况下的复杂信号,采用牛拉法迭代求解。
The pseudo differential LNA incorporates an active single ended to differential conversion using capacitive coupling compensation for improved phase and amplitude imbalance. 该伪差分结构低噪声放大器用有源的方法实现了单端输入到差分输出(非平衡一平衡)的转换,并采用电容耦合补偿的方法改善了差分输出信号的相位及幅度非平衡特性。
Considering the difficulty of instantaneous reactive power theory in the detection of single harmonic, and the shortcomings of traditional Fourier transform in the non-stationary signal, detecting methods of single harmonic amplitude and phase information based on STFT and WFT were discussed. 考虑到瞬时无功理论在检测单次谐波上的困难、传统傅里叶变换检测非平稳信号的不足,研究了用短时傅里叶变换和小波变换检测单次谐波幅值和相位信息的方法。
In the power system, the ideal power system supply voltage which is under a single constant frequency and voltage amplitude. 在电力系统中,理想的电力系统是以单一恒定频率与规定幅值的稳定电压来供电的。
Based the corrected results, the period of velocity pulse and its single or double sides characteristics were studied. The distribution area of pulse amplitude more than 14cm/ s was displayed. The influence of hanging/ foot wall and directivity effects to analyzed. 根据校正结果研究了速度脉冲的单双侧性和周期特征,给出了脉冲幅值在14cm/s以上的存在区域,分析了上下盘、方向性效应对速度脉冲的影响。
The proposed speech enhancement algorithm improves SNR of speech signals and overcomes problems of only a single spectral amplitude distribution function used. 该算法提高了语音信号的信噪比,在一定程度上克服了只使用单一语音谱幅度分布函数带来的问题。
Our mainly work is as follows: 1. The problem of sending a single classical bit through an amplitude-damping channel and a generalized amplitude damping channel is considered. 主要创新成果如下:1、研究了通过振幅阻尼通道和广义振幅阻尼通道传送一个经典比特的问题。
For a single chamfered rectangle hanger, the maximum amplitude reached 1 m when the most unfavorable wind approachs along the bridge. 对于切角长方形截面,在单根杆件分析中,顺桥向来风是最不利风向,最大振幅达1m。