The result shows that the duration time is about hundreds of thousands years ( 0 19 ~ 0 94Ma ) with a half magnitude of precision inaccuracy among different measures. 结果得出该糜棱岩带的形成时限为几十万年(019~094Ma)的时间跨度,不同方法测定时限的精度差值在半个量级左右。
Comparing to the conventional methods, the methods of Gauss curve fitting can nearly reduce the measurement time to half in essential measurement precision. 实际应用效果表明,在保证测量精度的同时,利用高斯拟合法测量谱峰,能使测量时间缩短近一半。
Half a Century of Precision Metrology 开发精密量仪的半个世纪
" Exterior pipe shell " mechanics models and deducting calculate formula of half experience and half theory which has upper precision is provided. The formulas considers the difference of crack width of concrete's shelter, and the calculation example is given in this paper. 提出外部管壁力学模型,并推导出精度较高的半理论半经验计算公式,该公式考虑了混凝土保护层内外的裂缝宽度差异,而后给出算例。
An Assemble of a Half wave Plate and Polarizers for Precision Controlled Attenuator Investigation and evaluation of cuneiform prism and neutral glass slices used as laser attenuator 用于精密衰减控制的半波片和偏振片组合装置高精度激光参数测量系统中衰减系统的研究与评价