飞利浦iU22彩超散热分析及故障维修实例

给出了飞利浦i U22系列彩超机的散热原理,并针对飞利浦公司iU22彩超的相应故障进行研究,提出了解决措施和方法

Improvement of Segmentation Correction Model Based on Local Features

基于局部特性的分割校正模型能够在图像分割的同时实现对非均匀场的校正,从而对灰度不均匀图像有较好的分割效果,然而,该模型具有局部特性,且采用多相分割,使得活动轮廓曲线对初始位置较为敏感,且分割速度较慢。针对该不足,通过引入自适应距离保持水平集算法,采用分割校正模型与自适应距离保持水平集相结合的方法,提出一种新的快速分割算法。实验结果表明,该算法可摆脱初始轮廓的限制,避免在分割灰度不均匀图像时边缘泄漏和分割不足现象,并且具有分割快速的特点。Segmentation correction model based on local features can implement the correction of intensity inhomogeneity images,for which has better segmentation effect,but with the local features of the proposed model,and using multiphase segmentation,so that it is sensitive to the initial position of the active contour curve and the segmentation is slow.Aiming at the shortage,a new fast segmentation algorithm is proposed by introducing Adaptive Distance Preserving Level Set(ADPLS) algorithm,combining the segmentation correction model and adaptive distance preserving level set method.Experimental results show that the improved algorithm not only gets rid of the influence of the initial contour,but also avoids the edge leakage and segmentation shortage phenomenon,maintains the fast segmentation.福建省自然科学基金资助项目(2008J0312

Research on the microbial limit verification test of tacrolimus capsules

目的按2010版《中国药典》的要求探讨他克莫司胶囊微生物限度检测方法。方法选取5种具有代表性的微生物菌悬液,用常规法、稀释法、膜过滤法或其相结合的方法分别对他克莫司胶囊进行微生物验证试验。结果细菌总数用膜过滤法稀释1∶10,霉菌和酵母菌用膜过滤法稀释1∶1 000,检测后回收率均能达到70%以上。结论避免采用单一常规法或膜过滤法进行微生物限度检测,使实验科学合理,提高工作效率,更加规范性。Objective To research the microbial limit verification test of tacrolimus capsules according to the requirements of the 2010-edition Chinese Pharmacopoeia.Methods Five types of representative microbial bacterial suspension were selected and then microbial verification tests on tacrolimus capsules through the conventional method,the dilution method,the membrane filtration method or a combination of the above methods respectively were carried out.Results Both of the recovery rates were more than 70% when the total number of bacterial was detected by the membrane filtration method as per 1∶ 10 and when mould and yeast were detected by the membrane filtration method as per 1∶ 1 000.Conclusion Microbial limit test through the single conventional method or membrane filtration method is avoided so as to ensure scientific and reasonable experiment,improve work efficiency and achieve normalization