1) higher approximation
高次逼近
1.
Research of modified RA decoding algorithm based on higher approximation
基于高次逼近的改进型RA译码算法研究
2.
This poper studies the higher approximation and error estimates of the solutions of second order linearordinary differential equationWith a large paraxneter u and a simple turning POint by means of a variant of the Gronwall-Bellmaninequality and the properties of Airy functions.
本文运用Ｇｒｏｎｗａｌｌ－Ｂｅｌｌｍａｎ不等式及其变形并结合Ａｉｒｙ函数的性质讨论了具有一个一阶转向点的合大参数ｕ的二阶线性微分方程的解的高次逼近及其误差估计。
2) gradual approach
逐次逼近
1.
In order to eliminate systemic error caused by different times, different labs, different analysis methods, and to solve some problems in merging maps, we propose a map adjustment theory and gradual approach method, based on a hypothesis that there are same means and standard deviate of data in adjacent small areas between maps.
针对区域地球化学中因不同时间、不同实验室、不同分析手段等原因存在于各图幅数据的系统偏差而造成的图边拼接问题，提出了抑制图幅间数据系统误差影响的图幅平差思想，阐述了图幅平差的数学原理及逐次逼近平差方法。
2.
By means of constructional iterative equationthis paper presents a way to give out the existence and singularity of a type of e- quational root with gradual approach method.
本文通过构造迭代函数，利用逐次逼近的方法给出了一类方程根的存在性与唯一性的判断的一种解决方案。
3.
Kepler s equations can be solved with the gradual approach, which can be further extended to the solution of the non-linear equations.
求解开普勒方程可用逐次逼近法 ,这种方法还可推广到非线性方程的求解问题中。
3) successive approximation
逐次逼近
1.
Capacitor self-calibration technique used in time-interleaved successive approximation ADC;
时间交叉存取逐次逼近型ADC中的电容自校准技术(英文)
2.
SDP with successive approximation and its application in the operation of multireservoir system;
逐次逼近随机动态规划及库群优化调度
3.
According to IEEE standard for short time disturbance of power quality,a fast successive approximation classification method is developed.
针对电力短时扰动信号具有非平稳、突发性的特点,应用小波变换的多分辨率分析特性检测扰动信号的特征参量,依据IEEE制定的短时电能质量扰动标准,提出了一种逐次逼近型的快速分类法。
4) approach step by step
多次逼近
5) order-reduction approximation
降次逼近
6) cubic approximation
三次逼近
补充资料：电力牵引高次谐波
电力牵引高次谐波
harmonics of electric traction
d Ionl一qlony旧gooe}x{ebo电j]牵引高次谐波(harmonies of eleetrietraction)整流式交流电力机车在整流过程中将引起交流侧电流、电压波形畸变，按傅立叶级数分析该畸变波形可分解成频率为基波频率整数倍的一系列高次谐波分量的叠加。 高次谐波电流、电压可引起下列不良影响: (1)对通信线产生杂音干扰影响; (2)引起电力系统中其他电力电容器设备的过负荷; (3)当电气化铁路负荷某次谐波电流频率与电力系统自身谐振频率相近时，可产生电流谐振，使该次谐波电流在电力系统中放大，危及电力系统安全运行; (4)使旋转电机、变压器、电力电缆的出力减少并产生过热，影响电气设备寿命; (5)造成继电保护误动或仪表读数误差; (6)使半导体开关元件换相失灵。 为限制谙波的危害，各国都规定了允许谐波含量的标准(见供电质童)。 为降低电力牵引负荷产生的谐波，在电力牵引变电所和电力机车中可装设由电容、电感组成的谐波吸收装置。交流一直流一交流电力机车利用电力电子技术，可实现低谐波分量的负荷特性，使谐波含量降低。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条