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本文采用替硝唑局部冲洗配合抗生素治疗冠周炎并进行临床观察。结果表明观察组冠周炎的痊愈率及显效率明显高于对照组。说明此种方法治疗冠周炎.简单易行.有推广应用价值。 相似文献
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The acquired hyperspectral images (HSIs) are inherently attected by noise wlm Dano-varylng level, which cannot be removed easily by current approaches. In this study, a new denoising method is proposed for removing such kind of noise by smoothing spectral signals in the transformed multi- scale domain. Specifically, the proposed method includes three procedures: 1 ) applying a discrete wavelet transform (DWT) to each band; 2) performing cubic spline smoothing on each noisy coeffi- cient vector along the spectral axis; 3 ) reconstructing each band by an inverse DWT. In order to adapt to the band-varying noise statistics of HSIs, the noise covariance is estimated to control the smoothing degree at different spectra| positions. Generalized cross validation (GCV) is employed to choose the smoothing parameter during the optimization. The experimental results on simulated and real HSIs demonstrate that the proposed method can be well adapted to band-varying noise statistics of noisy HSIs and also can well preserve the spectral and spatial features. 相似文献
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通过对4炉经过正火+回火热处理的HCM2S钢管进行拉伸试验,结合微观组织观察和能谱分析,研究了氮和氧含量对HCM2S钢组织和性能的影响.结果表明:当HCM2S钢中氮的质量分数大于71×10-6时会和硼元素反应生成BN夹杂物,从而使钢中"有效硼"量减少,降低钢的淬透性,最终影响组织和性能.氮含量不高于71×10-6时,氧的质量分数在14×10-6~49×10-6内变化不会对HCM2S钢组织和性能造成影响.通过在钢中加入少量Ti元素,即使氮含量较高,Ti也可以和氮发生反应生成氮化钛,从而获得全贝氏体组织和优异的力学性能. 相似文献
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陈绍林 《温州大学学报(自然科学版)》2006,27(1):95-98
绘画造型符号化不是停留在对视觉表层的模仿,而是对客观对象认识和体验的更加深刻地表现,是表现客观对象的精神本质。简化的提炼性绘画造型符号,情感的体验性绘画造型符号都是绘画视觉真实的表现。绘画造型符号化能使画家的艺术个性得到充分发挥, 艺术观点、观念不断更新。 相似文献
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研究系数密集间断的边值问题,采用降维方法,使得在数值计算上可实现并行计算,并且收敛性的证明变得很简洁。 相似文献
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