相位测量轮廓术中探测器非线性误差的分析

在相位测量轮廓术 (PMP)中 ,探测器的非线性响应是导致测量误差的重要因素 ,本文对该误差进行了理论分析和计算机模拟 ,比较了各种相移算法对这一误差的抑制能力 ,数值模拟与理论分析的结果一致。本文可为实际应用中合理地选择算法提供理论依据。

江西中药产业发展面临的十大挑战

党中央、国务院近年来高度重视中医药的发展,江西省也把中药产业作为全省六大支柱产业,如何做大做强江西省的中药产业,提高中药产业的综合竞争力和综合实力,更好地为江西省经济社会发展服务,是江西省需要研究解决的重大问题。当前,江西省中药产业有较好的发展基础,取得了不少成绩,但也存在不少问题,面临不少挑战。

A New Empirical Model for Estimation of sp^3 Fraction in Diamond-Like Carbon Films

A new empirical model to estimate the content of sp^3 in diamond-like carbon （DLC） films is presented, based on the conventional Raman spectra excited by 488nm or 514nm visible light for different carbons. It is found that bandwidth of the G peak is related to the sp^3 fraction. A wider bandwidth of the G peak shows a higher sp^3 fraction in DLC films.

Effect of Bias on Content of GeC in Ge1-xCx Films

Ge1-x Cx films with GeC content up to 11.6% can be prepared by using a medium frequency magnetron sputtering technique in our study. X-ray photoelectron analysis for these Ge1-x Cx films shows that the Ge1-x Cx films consist of C, Ge, GeC and GeOy. The content of GeC increases from 10.7% at 0 V to 11.6% at 250 V, and decreases to 9.6% at 350 V, and then increases again to 10.4% at 450 V. The Raman analysis confirms the result of XPS for checking GeC in the deposited Ge1-x Cx films. The related mechanism is discussed.

相位测量轮廓术中随机相移误差的校正算法

在相位测量轮廓术 (PMP)中 ,随机相移误差是导致测量误差的重要因素 ,提出一种新的随机相移误差的校正算法 ,在五步相移的基础上不需要求解相位分布 ,通过近似处理可以直接求解相移过程中存在的随机相移误差 ,在保证精度的情况下 ,能大大减少迭代次数和计算量。推导了新算法的计算公式 ,详细说明了随机相移误差的求解过程。计算机模拟和实验证实了新的算法的有效性。与In bokKong的算法相比较 ,新算法能大大减少迭代次数和计算量。该新算法也同样适用于相移干涉计量。