查询词典 frequency bandwidth

a scheme of channel estimation using cyclic prefix based on the measurement of the low-voltage power line channel model is presented.after obtaining the frequency response of pilot sub-channel under the state of comb-type pilot,the data sub-channel response is obtained by interpolating the frequency response in frequency direction.in the pilot-free data period,the estimation of the channel is carried out by using cyclic prefix in order to improve the performance of system error rate.

摘 要：通过实际测量给出低压电力线的信道模型，在此基础之上提出了利用循环前缀对信道进行估计的方法，即在梳状导频模式时，使用导频获得导频子信道频率响应后，对其在频域方向进行插值得到数据子信道响应，在其后没有导频的序列的数据周期内，使用循环前缀对信道进行估计，从而起到改善系统误比特性能的目的。

Cymometer introduce VHDL language with the frequency of the procedure in detail how to prepare a frequency measurement, how to count the frequency.

详细说明：频率计介绍了用VHDL语言编写的频率计的程序，详细编写了如何测频，如何计数频率。

Clearly described how to use VHDL design frequency integer, decimal fraction frequency, the frequency scores.

清楚地讲述了怎样用VHDL语言设计整数分频、小数分频、分数分频等，是学习VHDL不可多得的好材料！

In the measurement of three model, three ways under variable and control on the frequency of compressor and fan, which show different cooling capacity and heating capacity by frequency conversion when align different load, behave adaptable frequency to energy saving, avoid energy deucedly depletion.

在量测结果中可以发现各个模式在压缩机变频调控与风扇变频调变下，在不同的频率发挥出不同的冷冻能力与加热能力，可以匹配在不同之负载时，运行在最适合的频率下来达到省电的效果，避免能源消耗过度的现象产生。

Seizure frequency decreased by at least 50% in 47% of patients, by at least 75% in 24% of patients, and by 100% in 7% of patients. Of those receiving oxcarbazepine monotherapy, 59% had at least a 50% reduction in seizure frequency, 36% had at least a 75% reduction in seizure frequency, and 10% were seizure-free. Adverse events reported most frequently were dizziness in 46%, headache in 32%, fatigue in 30%, diplopia in 30%, nausea in 26%, abnormal vision in 21%, and somnolence in 21%.

结果在全部完成试验的患者中，47%的患者其发作频率下降至少50%，24%的患者发作频率下降至少75%，7%的患者2年间不再发作；而仅服用oxcarbazepine的患者中，59%的患者其发作频率下降至少50%，36%的患者其发作频率下降至少75%，10%的患者其发作频率100%下降；在副作用的部分，常见的有晕眩46%、头痛32%、疲倦30%、复视30、恶心26%、异常的视觉21%，以及嗜睡21%。

At first the frequency spectrum of diffraction light is sampled so as to make holographic grating diffraction discrete in space frequency, namely, in the grating code is included discrete frequency spectrum, which satisfies requirements of human vision.

首先对衍射光的频谱进行采样，使全息光栅衍射的是空间频率不连续的离散光，即在光栅的编码中只包含离散光频谱，且满足人眼视觉要求。

To measure the satellite oscillator frequency accurately is of great significance for transmitting time and frequency information by satellite,and the difficult point of the measurement is to deal with the Doppler frequency shift.

星载振荡器频率的测量对利用通信卫星进行标准时间和频率传递有重要的意义，测量的难点是多普勒频移的处理。

MD-12 is a solid high-power frequency of the two systems, there is a strong 12-inch low frequency driver and a 1-inch high frequency compression driver mounted on a continuous point of 80 degrees on X50 degree horn.

MD-12是一个高功率的坚固的二分频系统，有一个强劲的12英寸低频驱动器和一个1英寸高频压缩驱动器安装在一个持续指向性80度X50度号角上。

This paper presents a low-voltage excitation with feedback method. By pre-excitations, the vibration frequency of the sensor can be got to used as the output of the driver. The feedback signal frequency is very close to the real frequency of the sensor, so the wire can reach resonance state quickly.

本文提出一种反馈式低压激振方法，降低拨弦激振电压对传感器进行预激振，将反馈的振动频率信号作为输出，对传感器进行复振，可以在很短时间内使振弦达到共振状态。

Experiment shows that any liquid has its own especial electrical resonance frequency, and electrical resonance frequency is related with the characters of the liquid itself. As soon as any of the characteristics of the liquid changed such as component,thickness,density and viscidity,the frequency of the liquid electrical resonance will changed.

利用液体的这种电谐振特性，我们来测量血浆凝固过程中谐振频率的变化；当血浆任何性质发生变化，那么这时的血浆已经不是原来的血浆了，其谐振频率一定会发生变化。

In the chapter 2, the theoretic knowledge about the photosensitive resin and the grinding tools was firstly introduced.

第二章阐述了光固化树脂结合剂磨具的相关理论研究。

Do not use the program's indenting or margin-setting features; these will be added during typesetting.

不要使用缩排，页面边缘设置之类的选项，偶看不大懂。