Integrating neural network technology and noise analysis

The integrated use of neural network and noise analysis technologies offers advantages not available by the use of either technology alone. The application of neural network technology to noise analysis offers an opportunity to expand the scope of problems where noise analysis is useful and unique ways in which the integration of these technologies can be used productively. The two-sensor technique, in which the responses of two sensors to an unknown driving source are related, is used to demonstration such integration. The relationship between power spectral densities (PSDs) of accelerometer signals is derived theoretically using noise analysis to demonstrate its uniqueness. This relationship is modeled from experimental data using a neural network when the system is working properly, and the actual PSD of one sensor is compared with the PSD of that sensor predicted by the neural network using the PSD of the other sensor as an input. A significant deviation between the actual and predicted PSDs indicate that system is changing (i.e., failing). Experiments carried out on check valves and bearings illustrate the usefulness of the methodology developed.     

无损检测的质量控制技术

以控制无损检测中的误判为例,介绍了质量控制技术在无损检测质量管理工作中的应用.首先利用流程图发现出现误判问题的产生环节,即缺陷的定位或定量错误.然后利用两图一表(因果图、排列图和检查表)分析引起缺陷定量或定位错误的原因.最后制定了防止误判产生的对策表.采用质量控制技术可以实现无损检测质量的持续改进.     

用自定义函数校验与获取身份证数据

提出了使用Excel自定义函数自动获取身份证号码中的数据,以及对身份证进行错误及真假性校验的方法,实践证明本方法便捷高效。     

基于Delphi的新老中国标准书号转换设计

介绍了国际标准书号的相关知识,分析了10位及13位中国标准书号的组成结构及其校验码的生成方法,并利用Delphi实现校验码生成及不同位数中国标准书号之间相互转换的程序。     

试析学生德育记实考评的做法

本文从思想工作应该“康事实做”出发,讨论如何做好大学生德育纪实考评工作,提出了应该“思想到位”以提高认识,“措施到位”以建立规范,“工作到位”以保证落实。     

千万门级芯片设计中calibre的应用

随着集成电路不断发展,集成电路规模逐渐增大,百万、千万门级的集成电路越来越常见。在这些大规模的设计中,如何保证版图和逻辑设计的一致性成为必须要解决的问题。利用业界先进的物理验证软件calibre可以保证设计的正确实现。     

基于CRC码的脆弱数字水印算法

提出了一个用于珍贵作品完整性认证的脆弱数字水印算法。其特点是在认证时不需要原始水印,理论和实验结果证实所提算法具有很强的认证能力。     

单片机实现海明码纠错原理的研究

介绍了海明码的编码、解码、纠错原理及其构造方法,并将纠错原理应用于单片机之间的串行通信.阐述了发送机发送程序与接收机接收程序的流程,以及单片机实现海明码软件编码、解码的具体过程,并给出了找出一位差错并进行纠正的方法.该方法用于单片机遥测和遥控系统,具有高性价比、高可靠和操作简便的优点.     

Leakage tests for Am solid sources used for liquid xenon detector monitoring

Experimental tests are described to check solid ²⁴¹Am radioactive sources used to monitor operation of liquid xenon detectors. In particular, radioactive leakage was tested in extreme temperature conditions following immersion in liquid nitrogen for different time periods. No radioactivity loss was detected from the sources considered. The paper describes the source characteristics, test methods and results obtained.     

力矩分配法计算超静定结构成果校核方法研究

文章对力矩分配法计算超静定结构的成果校核方法作了探讨与研究，确保最后结果弯矩的正确性。