Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-05-20 Cooperative journals: 《计算机应用研究》
Abstract： For the discriminant analysis of multimodal data, the idea of localization can hardly reflect the difference of local geometric structure according to the global setting of local neighborhood by experience. Aiming at this problem, this paper proposed a neighborhood adaptive semi-supervised local Fisher discriminant analysis (NA-SELF) algorithm. The new algorithm based on the semi-supervised local Fisher discriminant analysis algorithm, obtained the initial neighborhood by combining the Mahalanobis distance and cosine similarity, and adjusted the number of neighbors according to the probability density estimation of sample space. The performance of feature dimensionality reduction using the algorithm was verified by the synthetic datasets and five UCI standard datasets. Compared with several typical dimensionality reduction algorithms and the discriminant analysis algorithm using the traditional k-nearest neighbor method, the experimental results show that the proposed algorithm has higher effectiveness.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2018-01-25 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To assess the safety and therapeutic effect of morcellator in transurethral bipolar plasmakinetic anatomical enucleation (TUPKAEP) of benign prostate hyperplasia (BPH). Methods The clinical data of 47 patients with BPH receiving TUPKAEPbetweenJanuaryandJuly,2015wereanalyzed.Duringtheoperation,morcellatorwasusedtosmashtheenucleated BPH which was aspirated with subatmospheric pressure in 29 cases, and the tissue was smashed with bipolar electrosurgical loop slicing from top to bottom and aspirated by ellic suction in 18 cases. Results The procedures were completed successfully inallthe47cases.Thetimeusedforadenomadissociationwas2.24�.09withmorcellatoratthespeedof18.43�.01g/min,and was 17.19�1.74 min with bipolar electrosurgical loop at the speed of 1.91�.65 g/min; the mean total operation time was significantly shorter in morcellator group (28.13�4.71 vs 43.22�5.39 min). The 2 groups showed no significant difference in postoperative continuous bladder irrigation time, postoperative indwelling time of urinarycatheter or postoperativehospital stay. ConclusionsMorcellatorissafeandfeasibleforapplicationinTUPKAEPandhelpstoshortentheoperationtime.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-09 Cooperative journals: 《中国腐蚀与防护学报》
Abstract：针对错银铜器的青铜－银电偶腐蚀问题，采用十八硫醇(ODT)的乙醇溶液在青铜和银表面制备了自组装膜（SAMs）。通过测量青铜－银的电偶对电流，研究了自组装前后的电偶腐蚀性能，并且采用X光电子能谱（XPS）、Tafel极化曲线法和微分电容法初步研究了ODT SAMs的作用机理。结果表明：ODT分子通过硫原子与基体形成硫醇盐，吸附在青铜和银表面形成自组装膜，该自组装膜在3.5%NaCl溶液中具有良好的电化学稳定性，能够有效抑制青铜和银之间的电偶腐蚀，属于混和抑制型缓蚀剂。
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