有效数字

The topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent AC to transfer DC module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2The feedback self-checking module is constructed by singlechip compositive 16 high accuracy A/D , established a closed-loop control system through this module and improved system's overall precision effectively.

本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度A/D构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

The matching device automatic test-board is the checking tool checked the matching device capability, precision and reliability are the technique of the the matching device, the precision is the precondition of checking the matching device, the reliability is credibility degree of the decision checking consequent.the topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent ac to transfer dc module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2the feedback self-checking module is constructed by singlechip compositive 16 high accuracy a/d , established a closed-loop control system through this module and improved system's overall precision effectively.

匹配装置自动测试台是检测匹配装置性能的检测工具，其重要的技术指标是精度与可靠性，其高精度是作为检测匹配装置的前提，可靠性是决定了检测结果的可靠度。本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度a/d构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

Time Inter-plug circuit is the key module of random sample DSO. It can improve the equivalent sample rate and horizontal time discrimination of DSO efficiently.

时间内插电路是随机取样数字存储示波器的关键电路，能有效提高数字存储示波器的等效采样速率和水平扫描时间分辨率。

Analogtodigital converter is very important in digital signal process board,so calculation of the effective numbers of bits is of great importance for evaluation of system performance.

将模拟信号转换为数字信号后再进行处理，是当前信号处理普遍使用的方法，模数转换器就是将模拟信号转换为数字信号的器件，所以计算其有效转换位数对系统性能评估就显得尤为重要。

To protect copyrights of digital products effectively, proposed a new scheme of digital image watermarking based on the combination of discrete wavelet transformation and singular value decomposition.

为了有效地保护数字作品的版权，提出了一种以离散小波多级分解与奇异值分解相结合的数字水印新算法。

Digital watermarking is an effective solution of copyright protection of Vector geographic data.

数字水印是对数字产品实施版权保护的一种有效技术。

Simulated data had be used to check these methods. Calculation results were quite satisfactory, in which exponential sampling, CONTIN and NNLS was suitable for unimodal and bimodal distribution. Based on the theoretical study, a PCS ultrafine particle size measurement apparatus was set up.

在以上理论分析的基础上，应用PCS理论研制了一台超细颗粒粒径测量装置，该装置在国内无关键专用设备----数字相关仪的情况下，采用软件辅以外围硬件设备替代数字相关仪，实践证明是有效的。

Main tasks as following: First, the basic theory of Algorithm, the methods of realization of IIR digital filters and the availability of the limited word length are introduced in detail.

主要进行了以下研究：首先详细地介绍了无限冲击数字滤波器滤波算法的基本理论，以及数字滤波器的实现方法、有效字长效应的分析。

This number is considered as the most significant government number, army have 3 division normally, a division has 3 groups normally, a group has 3 camp normally... the administrative measure of basic level personnel normally largish, but won't exceed 10?

这个数字被认为是最有效的管理数字，一个军通常有三个师，一个师通常有三个团，一个团通常有三个营……基层人员的管理数量通常稍大，但不会超过10？

The technology of digital filtrating wave and digital PID controlling is introduced in this system ,which effectively reduces the interference and improves the stability of the system

系统中采用了数字滤波技术和数字PID控制技术，有效的减小了系统中的干扰，提高了系统的稳定性。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。