查询词典 amplitude

In every-time iteration, we firstly estimate the signal amplitude and variance of residual interference plus noise with the output of channel decoding, then calculate the extrinsic information of multiuser detection, and finally conduct channel decoding.

在每一次迭代，首先根据信道译码器的输出估计信号幅度和冗余干扰及噪声方差，然后计算多用户检测的外信息输出，最后是信道译码。

The measurement system error model analysis is introduced into power system real time network state analysis as an important part for the first time, which can improve on the state estimation quality and provide the capability to monitor the operation of the measurement system; 2. The theory and algorithm of the on-line estimation and update of measurement noise variance based on the relation between the residual variance and noise variance. The statistic properties of the sample variance are discussed and the relation between the estimation precision and sample size under given confidence level is derived; 3. The theory and algorithm of detection and identification of measurement bias are presented, which is based on the relation between residual mean and noise mean. The statistic properties of sample mean are discussed and the relation between estimation precision and sample size is derived; 4. The Givens orthogonal transformation algorithm is selected to be the essential algorithm of state estimation, the fast orthogonal transformation algorithm with damp factor and the algorithm which can handle the zero injection measurements efficiently are presented; 5. The quantity analysis theory of bad data detectivity and identifibility are presented, which describes the relation between the elements in matrix W〓 and bad data amplitude and can provide the theory base for measurement system design and valuation.

一、首次将量测系统误差模型分析做为一个环节引入电力系统实时网络状态分析中，为EMS系统增加了实时监视系统运行、修正量测系统误差模型的新功能，进一步发挥了实时网络状态分析应用软件的潜力；二、首次提出了应用样本方差在线估计与修正量测系统误差方差的基本理论，讨论了样本方差的统计性质和概率分布，推导出了样本容量、估计精度和置信度之间的关系，给出了在线估计与修正量测系统误差方差的算法；三、首次提出了应用样本均值在线检测与辨识量测偏差的基本理论，讨论了样本均值的统计性质，推导了样本容量、估计精度和置信度之间的基本关系，给出了在线检测与辨识量测偏差的算法；四、在状态估计算法设计中，以Givens变换算法做为基本算法，提出了快速正交变换阻尼因子法和可以有效地处理零注入量测的混合法，并对实时应用中的一些问题进行了讨论；五、提出了不良数据可检测性与可辨识性的定量分析理论，揭示了描述量测系统配置、网络结构与参数的残差灵敏度矩阵中的元素与不良数据的幅值在可检测、可辨识能力上的定量关系，为量测系统配置设计与评价提供了理论基础；六、综合国内外最新研究成果，采用自适应自回归预测技术和稀疏矢量技术，构造了较完善的不良数据检测与辨识算法。

The primary factor that influences resonant characteristic comes down to loss. Also the optimum resonance amplitude condition has been obtained.

得出影响谐振特性的主要因素是损耗和耦合比，并推导出损耗和耦合系数之间的一个最佳匹配条件。

Numerical Simulation and Experimental Investigation on A Thermoacoustic Engine with Tapered Resonance Tube A symmetrical standing-wave thermoacoustic engine with tapered resonance tube has been numerically simulated with liner thermoacoustics. The simulation shows that using tapered resonance tube in thermoacoustic engine could decrease the velocity amplitude and lower the total acoustic power loss in the resonance tube. The experimental results indicate that the harmonic was suppressed effectively by using the tapered resonance tube, and the pressure ratio was improved.

采用锥形谐振管的热声发动机的数值模拟和实验研究利用线性热声理论，对一台采用锥形谐振管的驻波型热声发动机进行了数值模拟，发现采用锥形谐振管可有效降低工质气体的速度振幅，进而减小在谐振管中声功率的损失；与一台在相同频率下工作的采用等直径圆柱谐振管的驻波型热声发动机进行了实验对比，结果表明，在使用锥形管作为谐振管的热声发动机系统中，谐振管中的非线性效应得到了明显的抑制，热声发动机在基频模式下稳定运行，压比增大而加热温度降低。

And the VC is shown in amplitude-frequency response curve and filtering effects.

并且有可以在VC下显示幅频响应曲线和滤波效果。

Accommodative lag was assessed using MEM dynamic retinoscopy and accommodative amplitude was assessed with a push-up test. The binocular vision function was studied at the same time.

目的 研究远视性屈光参差患儿的调节幅度和调节滞后量，并比较其主导眼和非主导眼的差别。

This invention discloses a data retransfer method based on bit conversion which is to exchange positions forming bits, according to selected exchange way before quadrature amplitude modulation to each retransferred data.

本发明公开了一种基于比特变换的数据重传方法，该方法的关键是在每次重传数据进行正交振幅调制之前，对数据内各组成比特的位置按照选定的变换方式进行调换；该方法还进一步包括：a。

Significance of circannual rhythmicity was tested using the zero-amplitude hypothesis.

近年节律性的显著性采用零幅假设进行测试。

Fast locking time, low jitter performance and low power consumption are required in nearly all PLL applications in modem IC systems. Thus the design of PLL must generally deal with a tight tradeoff between the locking time and the amplitude of the ripple on the control line of oscillator.

在大多数单晶片系统环境设计中锁相回路其快速锁定时间与低抖动值效能和低功率消耗等值为重要的设计要点，然而锁定时间与主要影响振荡器输入电压控制线之振幅扰动的是相互的彼此限制影响。

Analyzed step motor subdivision drive technology based on principle of the current vector even rotating with uniform amplitude.

论述了以电流矢量恒幅均匀旋转原理为基础的步进电动机细分驱动技术。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。