power spectral density (psd)造句

• 3 . the frequency differences are determined by both the power spectral density ( psd ) and cepstrum of ambient vibration measurements . a matlab - based toolbox is developed , in which the differences of the higher adjacent frequencies can be easily evaluated
  3 .使用功率谱频差法和倒频谱频差法，开发了基于matlab平台的斜拉索环境振动基频识别gui工具箱。
• For sand , glass bean , quartz sand and pvc , pressure fluctuations were measured at different conditions . furthermore , statistics analysis , power spectral density ( psd ) analysis and chaos analysis of pressure fluctuations in gas - solid cfb were conducted . an investigation of the effect of circulating solid flux , superficial gas velocity , height from riser bottom and particle property on the parameters ( e . g
  本文测定了河砂、玻璃珠、玻璃砂和pvc四种颗粒在不同固体循环量、不同表观气速、不同轴向高度下的压力波动，进而对气固循环流化床压力波动时间序列进行了统计分析、功率谱分析和混沌分析。
• Some characteristics of the measured wind pressure field were discussed , including distributions of wind pressure , the effects of shape ratio on total wind force coefficients , auto - and cross - power spectral density ( psd ) distributions of fluctuating wind pressure , characteristics of the proper orthogonal decomposition ( pod ) results of the measured wind pressure field , effects of reynolds number on wind pressure distributions , etc
  根据测量结果对壳体表面风压场特性进行了分析，包括风压系数、整体风力系数、脉动风压自功率谱及互功率谱、风压场本征正交分解特性、雷诺数对壳体表面风压分布的影响等。
• Moreover , we put forward many schemes to erase errors such as static error , dynamic error , or make them little . especially we dicuss how to deal with the phase - shifting cell ( pzt ) and interferogram . in the end we bring forward two methods to estimate the contour of piano : one is traditional parameter , the other is power spectral density ( psd )
  提出从两方面对面形进行评价，一是用传统光学像质评价指标，二是利用psd从频谱角度评价面形，从而为高精度检测和控制大口径光学元件表面面形(波前)提供了依据。