中国医疗设备Issue(4)：21-23,50,4.DOI:10.3969/j.issn.1674-1633.2014.04.007
医疗系统中的计算机时间稳定性分析
Analysis of Computer Long-term Clock Error in Health Care System
摘要
Abstract
Modern health care system represented by intelligent medical and telemedicine treatment can not be separated from the precise time measurement. The computer time can easily provide a time basis, so the long-term clock error of it needs to be analyzed. In this paper, the basic principles of time basis and clock error were introduced, and a 90-day clock error data is brielfy analyzed. The quadratic polynomial was used to iflter the long-term trend of clock error, and the second-order sum of sine functions was used to ift the periodic item of clock error. Finally, the fast Fourier transform (FFT) and power spectral method were used to analyze the clock error respectively. Analysis results indicate that long-term clock difference contains two cycles, 52 days and 28 days, and when corrected according to the long-term and cycle trend, computer time can be better applied in the health care system.关键词
计算机时间/钟差/医疗系统/快速傅立叶变换/功率谱Key words
computer time/clock error/health care system/fast Fourier transform/power spectrum分类
信息技术与安全科学引用本文复制引用
孙朋,王洋..医疗系统中的计算机时间稳定性分析[J].中国医疗设备,2014,(4):21-23,50,4.基金项目
国家自然科学基金（41174025）。 （）
