频率转换

Secondly, an integrated capacitive signal conditioning circuit is newly proposed.

其次，本论文最新地提出一积体化之信号调节器，其为互补式金氧半导体之电容频率转换器且具有数位补偿器。

A kind of conversion of the original data matrix form, and data into training and testing, Frequency conversion by a small procedure.

一种把原始数据转换为矩阵形式，并且把数据分成训练与测试，按频率转换的一个小程序。

The activity of his research group has been dedicating to the quantum control of the photons with resonant photonic lattices. They have proposed the ways to slow, storage and release of femtosecond laser pulses in Resonantly Absorbing Bragg Reflectors.

近年来致力于光子在共振晶格结构中的量子操控，提出了一维共振吸收布拉格反射镜中超短激光脉冲的受控减速、静止、释放以及静止光场的非线性光学频率转换等新概念与新方法。

Second, all the compounds generate large nonresonant optical nonlinearities over a wide frequency zone, which can be used for a frequency conversion optical material.

此类体系在较大的宽频区表现出较小的色散行为，它们可以用于频率转换材料。

This paper bases on frequency-hopped and frequency synthesis theories, and through demonstrating three schemes of frequency synthesis, the paper selects one of these schemes that uses DDS spiriting up PLL and improves on the method according to the practical target and synchronously, the paper analysis the capability of the output signal and the conversion time of the frequency.

本文在对跳频理论及频率合成理论分析的基础上，在讨论三种频率合成方案后，设计完成了一种适于本课题的DDS激励PLL的混合方案，并对频率合成器主要性能中的输出信号的噪声特性和频率转换性能做了研究分析。

Potassium Dihydrogen Phosphate is a non-linear optical material used for laser frequency conversion and electrooptic modulators,it is typically machined by single point diamond turning.

压痕和刻划实验是测量材料弹性、塑性和断裂行为的最简单方法，磷酸二氢钾作为优质的非线性光学材料，常用作光学频率转换器件和电光开关元件，一般采用单点金刚石车削的方法加工此类零件。

High precision of data acquisition of accelerometers signal is achieved with V/F convertors.V/F convertors convert accelerometers analog signal into impulse which is transmitted to FPGA and converted digital signal.

为保证其高精度，采用了基于电压-频率转换的数据采集单元来完成加速度计信号的数字化。V/F转换器将加速度计输出的模拟信号转换为脉冲量，FPGA采集脉冲量并转换得到自标定模型所需数字量。

The frequency changing relay is out of order.

频率转换继电器故障，不能转换频率。

The capacitance pressure sensor converts the outside pressure exchanging signals into the capacitance changing values; the multi-way switch switches the capacitances of the two sides; the capacitance frequency converting circuit is the self-exciting oscillator circuit and converts the measured capacitance signals output by the multi-way switch into the frequency signals.

其中，电容式压力传感器：用于将外界压力变化信号转换为电容变化值；多路开关：用于对两侧电容进行切换；电容频率转换电路：其为一自激振荡电路，用于对多路开关输出的被测电容信号转换成频率信号。

But there was no current modulate circuit for TDLAS system.The design of modulation circuit for tunable diode laser based on DDS has been introduced.The main idea of design is using MCU to control DDS and D/A chips,so we can get sine wave and saw tooth signals.

DDS器件采用高速数字电路和高速D/A转换技术，具备了频率转换时间短、频率分辨率高、频率稳定度高、输出信号频率和相位可快速程控切换等优点，可以实现对信号的全数字式调制。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。