Based on a strong inter-diagonal matrix and Taylor series expansions,an oversample reconstruction method was proposed to calibrate the optical micro-scanning error. The technique can obtain regular 2 ×2 microscan...Based on a strong inter-diagonal matrix and Taylor series expansions,an oversample reconstruction method was proposed to calibrate the optical micro-scanning error. The technique can obtain regular 2 ×2 microscanning undersampling images from the real irregular undersampling images,and can then obtain a high spatial oversample resolution image. Simulations and experiments show that the proposed technique can reduce optical micro-scanning error and improve the system＇s spatial resolution. The algorithm is simple,fast and has low computational complexity. It can also be applied to other electro-optical imaging systems to improve their spatial resolution and has a widespread application prospect.展开更多
目的总结我院近4年来病原菌的分布及常见菌耐药性变迁.方法通过对2001～2004年临床标本分离的2741株细菌用MICROSCAN AUTO SCAN4仪器进行鉴定,药敏用K-B纸片扩散法.结果2741株细菌以革兰阴性菌为主,占71.23%,其排序依次为大肠埃希菌、...目的总结我院近4年来病原菌的分布及常见菌耐药性变迁.方法通过对2001～2004年临床标本分离的2741株细菌用MICROSCAN AUTO SCAN4仪器进行鉴定,药敏用K-B纸片扩散法.结果2741株细菌以革兰阴性菌为主,占71.23%,其排序依次为大肠埃希菌、铜绿假单胞菌、克雷伯菌属;阳性球菌以凝固酶阴性葡萄球菌分离率最高,未发现万古霉素耐药株;大肠埃希菌、克雷伯菌属对亚胺培南、阿米卡星、头孢他啶耐药率较低,铜绿假单胞菌对阿米卡星、环丙沙星耐药率相对较低,对亚胺培南耐药率却上升很快.结论临床常见病原菌对常用抗生素的耐药率较高,应加强细菌耐药性监测,合理使用抗生素.展开更多
For the nonuniform microscan system where the interframe translation is no longer equivalent to accurate halfpixel, a 2-dimension non-interpolated subpixel algorithm is proposed to consider arhitrary value of microsca...For the nonuniform microscan system where the interframe translation is no longer equivalent to accurate halfpixel, a 2-dimension non-interpolated subpixel algorithm is proposed to consider arhitrary value of microscanning. The aim of the proposed algorithm is to restore double resolution from 2 × 2 undersampled frames. To solve the ill-posed problem in the process of image reconstruction, the prior boundary condition is introduced, and the proposed subpixel reconstruction algorithm is reformulated into the form of line-by-line backward propagation iteration for reducing the calculation complexity. Since the direction of movement offset relative to the accurate halfpixel determines the transfer matrix of the image degradation process, the recon- struction is classified into 4 types when 2 × 2 mieroscan model is applied. All the simulation results and experiment data demonstrate the double resolution improvement compared with the undersampled images. The focus problem, scarcely any possibility of the operation with accurate halfpixel micromotion, is figured out for en-hancing the feasibility of subpixel reconstruction used in practice.展开更多
基金Supported by the National Natural Science Foundation of China(NSFC 61501396)the Colleges and Universities under the Science and Technology Research Projects of Hebei Province(QN2015021)
文摘Based on a strong inter-diagonal matrix and Taylor series expansions,an oversample reconstruction method was proposed to calibrate the optical micro-scanning error. The technique can obtain regular 2 ×2 microscanning undersampling images from the real irregular undersampling images,and can then obtain a high spatial oversample resolution image. Simulations and experiments show that the proposed technique can reduce optical micro-scanning error and improve the system＇s spatial resolution. The algorithm is simple,fast and has low computational complexity. It can also be applied to other electro-optical imaging systems to improve their spatial resolution and has a widespread application prospect.
文摘目的总结我院近4年来病原菌的分布及常见菌耐药性变迁.方法通过对2001～2004年临床标本分离的2741株细菌用MICROSCAN AUTO SCAN4仪器进行鉴定,药敏用K-B纸片扩散法.结果2741株细菌以革兰阴性菌为主,占71.23%,其排序依次为大肠埃希菌、铜绿假单胞菌、克雷伯菌属;阳性球菌以凝固酶阴性葡萄球菌分离率最高,未发现万古霉素耐药株;大肠埃希菌、克雷伯菌属对亚胺培南、阿米卡星、头孢他啶耐药率较低,铜绿假单胞菌对阿米卡星、环丙沙星耐药率相对较低,对亚胺培南耐药率却上升很快.结论临床常见病原菌对常用抗生素的耐药率较高,应加强细菌耐药性监测,合理使用抗生素.
基金Sponsored by the Ministerial Level Advanced Research Foundation (A1120060884)
文摘For the nonuniform microscan system where the interframe translation is no longer equivalent to accurate halfpixel, a 2-dimension non-interpolated subpixel algorithm is proposed to consider arhitrary value of microscanning. The aim of the proposed algorithm is to restore double resolution from 2 × 2 undersampled frames. To solve the ill-posed problem in the process of image reconstruction, the prior boundary condition is introduced, and the proposed subpixel reconstruction algorithm is reformulated into the form of line-by-line backward propagation iteration for reducing the calculation complexity. Since the direction of movement offset relative to the accurate halfpixel determines the transfer matrix of the image degradation process, the recon- struction is classified into 4 types when 2 × 2 mieroscan model is applied. All the simulation results and experiment data demonstrate the double resolution improvement compared with the undersampled images. The focus problem, scarcely any possibility of the operation with accurate halfpixel micromotion, is figured out for en-hancing the feasibility of subpixel reconstruction used in practice.
