查询词典 modulation

Common lifetime measurement methods for minority carrier of crystalline silicon and crystalline silicon solar cells were introduced, including microwave photoconductivity decay, quasi-steady state photo-conductance, surface photoelectric voltage, infrared carrier density imaging, modulation free-carrier absorption and laser beam-induced current microscopy.

分别介绍了常用的测量晶体硅和晶体硅太阳电池少子寿命的各种方法，包括微波光电导衰减法，准稳态光电导方法，表面光电压，IR浓度载流子浓度成像，调制自由载流子吸收和光束诱导电流，并指出了各种方法的优点和不足。

The F1,F2 absorption double lines, which is composed of two lines 6MHz apart, was high sensitively detected by use of the wavelength modulation and harmonic detection techniques.

利用波长调制和谐波探测技术对频率位于6105.626cm~(-1)附近的两条间隔仅6MHz的F1、F2吸收双线进行高灵敏检测，从理论和实验上同时分析了影响本实验灵敏度主要噪声原因。

Continental cake taste, its soft sweet almond cake filled with a mixture of strawberry fruit, intermediate-run liquor Manley modulation alloy white chocolate wood Division;re-decorating the top of strawberry fruit, honey beans into the very popular women's favorite!

欧式蛋糕的口味，其温软香甜的杏仁蛋糕夹杂着颗颗饱满的草莓鲜果，中间润合金万利酒调制的白巧克力木司，顶层再点缀草莓果，装饰得如同少女般讨巧可人，蜜豆的融入极受女性的喜爱！

To improve the system damping, the supplementary control of UPFC is proposed, with its input as the active power or the bus voltage angle difference of the tie line, and its output as the modulation signal to the main control.

UPFC的辅助控制则通过线路功率反馈或母线电压相位差反馈，产生控制信号以调制前述各定值控制中的参考值，如母线电压调制或线路功率调制，以增加系统阻尼，平息持续振荡，并通过小干扰分析考察了辅助控制的效果。

Then the DTC theory of PMSM and the voltage vector table are analyzed. A new DTC scheme for PMSM is proposed in this paper, which is based on the area voltage vector. And the paper offers the available modulation algorithm between torque and flux.

拓展了一种基于区域电压矢量表的新型控制策略用于永磁同步电机直接转矩控制，并给出了转矩、磁链作用分量协调可控的电压矢量选取调制算法，基于理论分析和MatLab6。

In this paper Ⅰ successfully applied these methods to fault diagnosis, and presenting some new innovative machinery fault diagnosis method; First Ⅰ present a new gear wornout fault diagnosis method, this method use the vibration signal's time-frequency attribute and instantaneous phase undulation to accurately detect gear's fault, and by comparing with the traditional frequency domain analysis method, this method reveals that many nonlinear and nonstationary characteristic exist in gear's vibration, this tell us that if we use frequency domain analysis method without pay attention to the signal's characteristic, we could get wrong diagnostic result; Then Ⅰ present a new bearing fault diagnosis method, this method use ATVFD and Hilbert transform to do envelop demodulation,Ⅰ analyze the envelop with time-frequency method and find out that this method is more accurate then traditional method.Ⅰ also explain that the modulation of the fault to the carrier wave may also be non-stationary and nonlinear; Finally Ⅰ present a cylinder pressure measurement method of diesel engine by means of vibration, cylinder pressure is an important parameter of diesel engine fault diagnosis, the pressure measuring is simplified a lot by this method,Ⅰ also use the ATVFD and time-frequency analysis to realize it.

本文中将上述理论方法成功地应用到故障诊断中去，提出了几点创新性的诊断方法；提出了一种齿轮磨损故障诊断的新方法，该方法利用振动信号能量的时频域分布特征与瞬时相位波动特征可以进行精确的齿轮故障诊断，并通过与传统的频域诊断方法的比较，揭示出齿轮振动中存在的明显的非线性与非平稳特征，说明了不加选择地利用频域分析方法进行齿轮故障诊断很可能会得到错误的诊断结果；提出了一种轴承故障诊断的新方法，该方法利用ATVFD分解与Hilbert变换进行包络解调，并对解调得到的包络信号进行时频域分析，可以实现更加准确轴承故障诊断，说明了故障对载波信号的调制往往也是非平稳与非线性的；提出了一种利用振动信号进行柴油机汽缸内压力检测的新方法，柴油机汽缸压力的变化是柴油机故障诊断的重要参数，利用振动方法可大大简化汽缸压力的检测过程，该方法也是综合利用ATVFD分解与时频域分析方法实现的。

It not only includes the "highly resemble" jamming signals generation by adding distance, azimuth, velocity and envelop deceiving information to the original captured radar transmitted pulse, but also includes the "covering" jamming signal generation by an modulation which will get an unmatched processing result in the radar receiver's match filter.

提出&高逼真欺骗干扰&和&掩护式欺骗干扰&的概念，详细阐述了&预警雷达高逼真及掩护式欺骗干扰技术&的原理，具体内容包括对雷达实现距离、方位、速度、幅度起伏等&高逼真&欺骗信息调制，以及利用脉冲压缩失配法产生多目标干扰回波以完成&掩护式&欺骗信息调制。

It overcomes low automation and adaptability of other congeneric control systems.Through timer module to set bait supplying time,the function of automatic feeding was realized in a whole day.Through master control CPU circuit and direct current velocity modulation to control the speed of feeding electromotor,the purpose of adjusting feeding distance was realized....

通过定时模块灵活设置供饵时间，实现全天全自动投饵的功能；主控CPU电路及直流调速电路控制投饵电动机的速度，实现了调整投饵距离的目的；霍尔电路与声光报警电路保护投饵电机的安全；使自动投饵控制系统的通用性更强，可以应用到各种水产养殖业的供饵系统中。

In the case of parietal cortex, multiplicative gain modulation appears to play a crucial role in the transformation of object locations from retinal to body-centered coordinates.

在颅顶骨皮质层的案例中，倍数的成长调节在将物体位置从视网膜转换成躯干中心的调和上，似乎扮演了一个极为重要的角色。

This paper introduces the application of the programmable controller,the direct current velocity modulation system,the frequency inverter and the electronic cam switch in chamfering machine.

介绍可编程控制器、直流调速系统、变频器、电子凸轮开关在倒棱机中的应用。

"Second Life is remarkably easy to work with, and is very popular,"

"第二次生命是显着容易的工作，并且很受欢迎，"

For example, we usually assume that materials are homogeneous and isotropic and free of internal defects or flaws.

为了得到适合有限元分析的模型，我们必须经过如图2所示的简化步骤。