数字信号

The process speed of digital filter was fallen by change sequence of interpolator to realize real time process.

通过改变抽取或内插位置来降低数字滤波器的处理速度，实现信号实时处理。

The digital frequency source this paper researched uses high integrated DDS chip AD9851 as frequency sources and signal mirac processors AT89C51 as system control center, it can output 10Hz-20MHz signal with high-precision and high stability frequency. The evenness of signal within the range of 10MHz is low to 0.1dB degree, and the smallest step is low to 10Hz frequency.

本课题研究的数字频率源采用高集成度DDS芯片AD9851作为频率源；以单片机AT89C51作为系统的控制中心，实现了10Hz～20MHz的高精度、高稳定度的频率输出。10MHz内信号幅度的平坦度为0.1dB、频率最小步进为10Hz。

By utilizing the theory of numerical processing, digital frequency spectrum analysis and multi-rate digital signal processing, this paper focuses the research on mechanism of the testing error, the compensation of testing error in the field of sampling technology, nonsynchronous sampling, nonuniformly sampling, and puts forward some new analyzing, compensation and realization methods.

本论文通过运用数值处理、数字频谱分析和多抽样率信号处理的有关理论和原理，对采样技术、采样的非同步方式和采样的多通道方式中的测试原理、测试误差产生机理、测试误差补偿及其应用技术等主要环节进行了深入的研究，提出了一些新的分析与处理方法，建立了有关测试误差分析与补偿的预估理论和实现方法。

The digital spectra and SNR of nonuniformly sampled signals is analyzed by utilizing Fourier transform technique.

利用付氏变换的分析方法对这类非均匀取样信号的数字谱结构及信噪比进行了分析。

The rotproof and wearable kinds of pressure transducers and transmitters are suitable for pressure measurement on various occations of chemical fibre, plastic, rubber and petrifaction . They can succeed in measuring and controlling pressure with our Series PW intelligent digital pressure gauges.

防腐耐磨型压力传感器及变送器使用于塑料、化纤、石化等各种特殊场合的压力测量，与我公司的PW系列智能数字压力表配套使用可实现压力的测量与控制，变送器系列采用24V直流供电，输出标准信号便于计算机采集。

During this process, in addition to the matching factor among equipment, the conversion between analog and digital signal, the loss during signal transmission and multiple changes of phases are likely to arouse the following problems in recorded sound: hollow sound, lack of harmonic, shrilling treble, dry and thin mid-treble, flat and narrow midrange, loose mid-bass and muddy bass.

在这一过程中，除了器材与器材之间的匹配因素外，模拟数字间的转换、信号传输的损失、相位的多次变化，都有可能使录制的声音出现：声像空洞、缺少泛音、高音尖细、中高干薄、中音平窄、中低松散及低音混肥等问题。

Because how to improve the measurement accuracy of CT parameters is the key of low voltage method, the paper in detail introduces the electronic parameters measurement circuit, furthermore,the needed digital sinal source ,CT ratio measurement circuit ,the way of digital sampling ang sinal processing are emphasized in the paper.

文中详细介绍了CT 内部参数的测量原理及实现方法。在其中着重讨论了校验仪中所需的高精度测试信号源及变比测量电路的原理和实现、数字采样技术及数据的分析处理方法。

To carry out the attack, you would need to find line-of-sight and have good signal strength (between -40 and -80 dBm) to the target AP, and have knowledge of an SUID which is already connected, or try random numbers until you find one which works - most providers have quite a number of subscribers per AP so this should not be hard.

进行攻击，你需要找到的视线，并具有良好的信号强度（在-40和-80 dBm的）美联社的目标，并具有一的SUID知识，已经连接，或者尝试随机数直到您找到一个工作-大多数供应商有不少美联社用户每一个数字，所以这应该不难。

According to the similarity both in aliasing /separation of signal of the ICA model and the embeding/extraction process in the watermarking system, the scrambling image is embeded into the wavelet domain with the linear supraposition.

根据ICA模型中的信号混叠/分离与数字水印嵌入/提取过程之间的相通性，以线性叠加的方式将置乱水印嵌入到图像小波域的某些系数上，检测/提取时通过ICA技术提取水印。3。

The spectrum shaping technology is applied to acquisition system of telemetric seismic instruments.

遥测数字地震仪 I/O系统的采集系统中采用了频谱整形技术，这一技术使采集站前放增益随信号频率升高，以 6 d B/oct的速率递增，从而补偿了因大地吸收效应造成的高频损耗。

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。