数字信号

After introducing the principle of Direct Digital Synthesizer, the paper analyses the performance of output signal.

在介绍数字频率合成的原理之后，论文首先对对输出信号的性能进行了分析。

A simplified signal model of digitalized receiver and the signal model of interference, such as tone interference, autoregressive interference and digital interference, are provided. And it is analyzed in detail the capability of DSSS communication systems in suppressing broadband Gaussian interference, single tone interference and partial band interference.

给出简化的接收机信号模型和常用的窄带干扰模型(音调干扰、AR干扰、低速数字干扰等)，分析了DSSS技术对阻塞高斯干扰、单音干扰、部分频带干扰等的抑制性能。

The preamplifier which functions as a digital AV control center which does not perform any signal magnification as a preamplifier, but unifies all program sauce other than Phono.

前置放大器的作用是作为一个数字影音控制中心不执行任何信号的前置放大器放大，但所有程序统一调味以外唱机。

That component of the total timing jitter produced in the justification process which occurs because justification cannot be carried out on demand but has to wait until one of the preassigned justifiable digit time slots appears.

调整过程中产生的总定时信号跳动中的一部分，其产生原因是不可能完全按要求那样进行调整，而必须等待，直到预分配的调整数字时隙出现为止。

A method for quartz rate sensor using digital correlation detection is proposed to improve the performance of QRS.

为提高石英角速率传感器的测量性能，提出了基于数字相关检测技术的QRS信号解调方案。

In this thesis , we use electronical TDM and optical WDM to realize a quadruplex system of digital video fiber transmission .

本文利用电时分复用和光波分复用的方式实现了四路数字视频信号的单光纤传输，并设让出了两路实验系统电路。

The task request a quadruplex system and the image quality must above 3.5 points in the 5 level quality evaluation system .

这是为实现多路视频的单光纤传输而研制的项目，该项目要求用单纤传输四路数字视频信号，同时要保证图像质量达到五级质量制评价标准的3.5分以上。

In order to adapt orthogonal digital video signal processing,it adopts orthogonal processing technology,advanced methods of range error extraction,high accuracy range quantization error and high-speed code complement counter etc.

为了适应正交数字视频信号的处理，采用了正交处理技术、先进的距离误差提取方法、高精度距离量化误差及高速反码计数器等新技术

Projectile's radial acceleration sample value in trajectory includes projectile's angular velocity information and air drag acceleration,to extract angular velocity-time series value,the design method of the FIR digital filter firstly uses Matlab to design and emulate,and then on the float-point of DSP digital filtering is realized.

旋转弹丸外弹道离心加速度采样信号包含有高频弹丸转速信息和空气阻力加速度低频分量，为了提取弹丸转速－时间序列值，需要实时滤除低频阻力加速度分量，设计了在DSP中实时实现的数字滤波器。

However, the CMOS image sensors can provide stronger anti-radiation capacity than CCD as well as Single Chip Integrating with image sensors array, drive and control circuit, signal processing circuit, A/D conversion circuit and Completely Digital Interface Circuit. The CMOS image sensors also possess high quantum efficiency, wide spectral response, good response uniformity, low supply voltage and low request of clock. At the same time, the small bulk, high reliability, low power consumption and low cost are the prominent advantages of the CMOS image sensors too, thus CMOS image sensor has more exploiture foreground in X-ray real-time radioscopy imaging system.

由于CMOS 图像传感器比CCD 具有更强的抗辐射能力，还具有将图像传感器阵列、驱动和控制电路、信号处理电路、模数转换电路、全数字接口电路等实现单片集成以及量子效率高、光谱响应宽、响应均匀性好、工作电压低、对时钟脉冲要求低、体积小、重量轻、功耗低、高可靠、低成本等优点，因此在X 射线实时检测中更具有开发前景。

They go to town. Would you just ask them?

他们在城里你能问他们吗？

Ossein pretreated for a2 weeks period exhibited the maximum% yield incase of bone gelatin, while the yield from intact skin was higher than that realized incase of de-scaled skin.

预处理时间达2星期的骨胶原表现出最高的骨明胶百分产量，然而从未处理鱼皮中得到的产率比去鳞的鱼皮得到的要高。