通过对图像做仿jpeg流程的处理，在DCT变换的直流系数上嵌入水印，对于各种常用的JPEG压缩量化因子，可以得到良好的水印嵌入效果。
It embeds the watermark bits on the DC of the DCT transform coefficients, for most JPEG quality factor, the method is proved to be robust and effective.
在此基础上讨论铝含量、直流偏压及后期处理对薄膜摩擦系数的影响。
The effect of Al content, direct current negative bias and post treatment on the friction coefficient of the films was studied.
描述了基于影响系数分离算法平衡自驱动外转子直流电机的测试系统原理及其实现方法。
The systematic test principle and realization technique of dynamic balance method for self-driving outer rotor DC motor based on influence coefficient separate method are described in this paper.
它与一般永磁直流电机的计算方法的差别仅在于计算极弧系数的确定。
The difference between it and ordinary PM motor is that their effective polearc coefficients are not the same.
该算法是先对有意义的灰度图像进行水印序列化处理后，再将其作为水印信号嵌入到载体图像的分块DCT系数直流分量里。
The meaningful gray image is serially processed into watermark signal and embedded into the DC elements of the block DCT coefficient matrix of the host image.
说明：半定规划内点法数据整理交直流系统统一无功优化算法，系数矩阵的确定。
Interior point method for semidefinite programming data collation ac and DC systems unified reactive power optimization algorithm to determine the coefficient matrix.
直流电磁铁是广泛应用的电磁控制元件，PT C元件是具有正温度系数特性的半导体陶瓷热敏电阻。
Direct current electromagnet is extensively used as electromagnet controlling element. PTC element is a ceramic thermistor with positive temperature coefficient.
实验研究了外加直流电场作用下水驱油藏多孔介质中的流体渗流速度、阻力系数、储层渗透率及原油采收率的变化特性。
The variation of seepage velocity, resistance coefficient, reservoir permeability and oil recovery in porous media of water-drive reservoir in direct current (DC) electric field are studied in detail.
研究发现包层膜有效折射率、直流耦合系数及奇数阶次的交流耦合系数都随着波长的增加而减小。
It is revealed that the effective refractive index and the DC coupling coefficient, as well as the ac coupling coefficient of odd order modes, will be decreased with the increase in wavelengths.
本文提出应用一对模拟函数对直流电测深逆滤波系数在微机上进行优化的一种简单方法，并给出了程序框图。
In this paper, the author presents a simple method to optimize the inverse digital filter of VES with a given pair of analogue functions on a microcomputer.
分析集中式绕组的无刷直流电机各结构设计参数对磁场的影响，尝试求取、分析空载漏磁系数，讨论如何削弱定位转矩。
The influence of a centralization winding brushless DC motor structural design parameter and magnetic field were analyzed, and a way to achieve the fix position angular force was brought out.
对一个仅含有直流输电线路的系统，采用复转矩系数——测试信号法，对其次同步振荡特性进行了分析。
Using the test signal method, a detailed analysis of subsynchronous oscillation for a HVDC system is performed.
利用减温水控制过热器和再热器出口温度以防止超过材料温限。实践证明，对超临界直流锅炉采用投粉稳压冲管过热器、再热器冲管系数可达1.0和1.6以上，效果良好。
The practical experience shows that in the light of steam purging for supercritical once-through boiler, the superheater and reheater disturbance coefficients can reach 1.0 and 1.6 respectively.
串联电阻法与双线圈换接法是两种提高直流电磁开关返回系数的常用方法。
In this paper two methods to elevate the return factor of the d.
它与一般永磁直流电机的计算方法的差别仅在于计算极弧系数的确定。
There is no perfect method to calculate this kind of machine. The difference between it and ordinary PM motor is that their effective pole arc coefficients are not the same.
通过测试直流电机内阻和反电动势系数随电机电流的变化曲线，从而得到电机转速更精确的估计表达式。
A more accurate estimate expression is obtained by testing the curve of DC motor internal resistance and back-EMF coefficient which changes with the motor current.
在直流电路中这并没有影响，但对交流电路却有反作用，因为感应系数使该器件对频率的变化很敏感。
This does not affect performance in DC circuits , but can have an adverse effect in AC circuits because inductance renders the device sensitive to changes in frequency. disadvantages.
当负极性比率等于零即直流且焊丝为正极性的MIG焊时，其焊缝熔深最大，焊丝熔化系数最小，熔敷速度最小；
When electrode negative ratio is zero, which is using MIG welding with DC ami welding wire being positive polarity, weld penetration is maximum , wire melting speed and deposition rate are minimum;
当负极性比率等于零即直流且焊丝为正极性的MIG焊时，其焊缝熔深最大，焊丝熔化系数最小，熔敷速度最小；
When electrode negative ratio is zero, which is using MIG welding with DC ami welding wire being positive polarity, weld penetration is maximum , wire melting speed and deposition rate are minimum;
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