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四川大学华西医院日间手术术式与国家推荐术式的比较研究
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作者 方路 雷甜甜 +2 位作者 刘洋 马洪升 梁鹏 《华西医学》 CAS 2024年第2期190-194,共5页
目的 分析四川大学华西医院日间手术开展现状,与《日间手术推荐目录(2022年版)》(以下简称“国家推荐术式”)进行对比,以期为日间手术术式更新提供参考。方法 选择2009年10月-2023年7月四川大学华西医院开展的日间手术术式。根据手术专... 目的 分析四川大学华西医院日间手术开展现状,与《日间手术推荐目录(2022年版)》(以下简称“国家推荐术式”)进行对比,以期为日间手术术式更新提供参考。方法 选择2009年10月-2023年7月四川大学华西医院开展的日间手术术式。根据手术专科、操作类别、操作方式、手术分级等进行分类统计,并将四川大学华西医院开展术式与国家推荐术式进行比较。结果 四川大学华西医院开展术式576种,涉及15个专科;国家推荐术式662种,涉及11个专科。在国家推荐术式中,四川大学华西医院已开展233种术式,另有26种作为门诊手术开展。四川大学华西医院开展术式以二、三级手术为主,国家推荐术式以二级手术为主。结论日间手术高质量发展不应局限于术式的补充,需在保证医疗质量安全的前提下,努力提高微创及四级手术占比,提升日间手术整体医疗水平。 展开更多
关键词 日间医疗 日间手 开展 推荐 术式分类 分级
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ASYMBOOST-BASED FISHER LINEAR CLASSIFIER FOR FACE RECOGNITION
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作者 Wang Xianji Ye Xueyi Li Bin Li Xin Zhuang Zhenquan 《Journal of Electronics(China)》 2008年第3期352-357,共6页
When using AdaBoost to select discriminant features from some feature space (e.g. Gabor feature space) for face recognition, cascade structure is usually adopted to leverage the asymmetry in the distribution of positi... When using AdaBoost to select discriminant features from some feature space (e.g. Gabor feature space) for face recognition, cascade structure is usually adopted to leverage the asymmetry in the distribution of positive and negative samples. Each node in the cascade structure is a classifier trained by AdaBoost with an asymmetric learning goal of high recognition rate but only moderate low false positive rate. One limitation of AdaBoost arises in the context of skewed example distribution and cascade classifiers: AdaBoost minimizes the classification error, which is not guaranteed to achieve the asymmetric node learning goal. In this paper, we propose to use the asymmetric AdaBoost (Asym- Boost) as a mechanism to address the asymmetric node learning goal. Moreover, the two parts of the selecting features and forming ensemble classifiers are decoupled, both of which occur simultaneously in AsymBoost and AdaBoost. Fisher Linear Discriminant Analysis (FLDA) is used on the selected fea- tures to learn a linear discriminant function that maximizes the separability of data among the different classes, which we think can improve the recognition performance. The proposed algorithm is dem- onstrated with face recognition using a Gabor based representation on the FERET database. Ex- perimental results show that the proposed algorithm yields better recognition performance than AdaBoost itself. 展开更多
关键词 AsymBoost ADABOOST Gabor feature Face recognition
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Parameters and Trajectory Overall Optimization Design of the Combined Cycle Engine Reusable Launch Vehicle 被引量:1
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作者 CUI Naigang ZHAO Lina +1 位作者 HUANG Rong WEI Changzhu 《Aerospace China》 2016年第4期14-20,共7页
Reusable launch vehicle is an important way to realize fast,cheap and reliable space transportation.A combined cycle engine system provides a more efficient and flexible form of power.The investigation on the research... Reusable launch vehicle is an important way to realize fast,cheap and reliable space transportation.A combined cycle engine system provides a more efficient and flexible form of power.The investigation on the research status of the combined cycle engine technology,including basic principle,research programs and classification of structure is firstly discussed in this paper.Then the bilevel hierarchical and integrated parameters/trajectory overall optimization technologies are applied to improve the efficiency and effectiveness of overall vehicle design.Simulations are implemented to compare and analyze the effectiveness and adaptability of the two algorithms,in order to provide the technical reserves and beneficial references for further research on combined cycle engine reusable launch vehicles. 展开更多
关键词 Reusable launch vehicle Combined cycle engine Bilevel hierarchical Integrated Parameters/trajectory overall optimization
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