检索结果-南通市图书馆

Enhanced Denoising Autoencoder-aided Bad Data Filtering for Synchrophasor-based State Estimation

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2022年第2期8卷 640-651页

作者： guanyu tian Yingzhong Gu Zhe Yu Qibing Zhang Di Shi Qun Zhou Zhiwei Wang GEIRI North America San JoseCA 95134 USA GEIRI North America San JoseCA 95134 USA on leave from Department of Electrical and Computer EngineeringUniversity of Central FloridaOrlandoFL 32816 USA Grid Dispatch Center State Grid Jiangsu Electric Power Company Ltd.Nanjing 210024China Department of Electrical and Computer Engineering University of Central FloridaOrlandoFL 32816 USA

Due to its high accuracy and ease of calculation,synchrophasor-based linear state estimation(LSE)has attracted a lot of attention in the last decade and has formed the cornerstone of many wide area monitor system(WAMS)***,an increasing number of data quality concerns have been reported,among which bad data can significantly undermine the performance of LSE and many other WAMS applications it *** data filtering can be difficult in practice due to a variety of issues such as limited processing time,non-uniform and changing patterns,and *** pre-process phasor measurement unit(PMU)measurements for LSE,we propose an improved denoising autoencoder(DA)-aided bad data filtering strategy in this *** data is first identified by the classifier module of the proposed DA and then recovered by the autoencoder *** characteristics distinguish the proposed methodology:1)The approach is lightweight and can be implemented at individual PMU level to achieve maximum parallelism and high efficiency,making it suited for real-time processing;2)the system not only identifies bad data but also recovers it,especially for critical *** use numerical experiments employing both simulated and real-world phasor data to validate and illustrate the effectiveness of the proposed method.

关键词： Autoencoder bad data processing linear state estimation PMU

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

330MW循环流化床锅炉调试要点

工程技术研究 2017年第12期2卷 11-13页

作者：田冠玉中国大唐集团科学技术研究院有限公司华东分公司安徽合肥230088

文章介绍了某330MW循环流化床锅炉的调试工作及过程,阐述了调试期间所遇到的问题进行的设计修改、建议和措施,并针对某循环流化床锅炉的调试要点如空气动力场试验、燃烧调整和煤泥掺烧等调整手段进行了分析探讨,为单炉膛大型循环流化床... 详细信息

文章介绍了某330MW循环流化床锅炉的调试工作及过程,阐述了调试期间所遇到的问题进行的设计修改、建议和措施,并针对某循环流化床锅炉的调试要点如空气动力场试验、燃烧调整和煤泥掺烧等调整手段进行了分析探讨,为单炉膛大型循环流化床机组提供了理论依据和调试经验。

关键词：循环流化床锅炉调试

应用悬垂石膏结合石膏夹板治疗肱骨投弹骨折的疗效

在线全文

学校读者我要写书评

暂无评论

第三军医大学学报 2018年第3期40卷 255-258页

作者：崔运利刘振东田冠玉宋磊堂常旭东任德新杨贵财闵月解放军第230医院骨科辽宁丹东118000

目的评价应用悬垂石膏结合石膏夹板治疗投弹骨折的临床效果。方法回顾性分析2010年1月至2016年6月在本科室收治的36例投弹骨折患者,其中合并桡神经轻度损伤3例,双螺旋骨折1例,所有患者入院后即予以悬垂石膏固定,3~4周后改用石膏夹板外固... 详细信息

目的评价应用悬垂石膏结合石膏夹板治疗投弹骨折的临床效果。方法回顾性分析2010年1月至2016年6月在本科室收治的36例投弹骨折患者,其中合并桡神经轻度损伤3例,双螺旋骨折1例,所有患者入院后即予以悬垂石膏固定,3~4周后改用石膏夹板外固定,石膏固定后允许早期未固定关节进行功能锻炼。结果患者平均随访12个月,骨折临床愈合时间8~10周,肩、肘关节功能按Rodriguez-Merchan、Mayo评分标准评分,优34例,良2例,总优良率100%。结论应用悬垂石膏结合石膏夹板治疗投弹骨折的方法简单易行,全程无创操作,可以取得满意的临床效果。

关键词：训练伤肱骨投弹骨折石膏治疗

经伤椎椎弓根螺钉内固定治疗胸腰椎爆裂骨折体会

在线全文

学校读者我要写书评

暂无评论

创伤与急危重病医学 2014年第1期2卷 55-57页

作者：田冠玉崔运利宋磊堂常旭东任德新解放军第230医院辽宁丹东118000

目的探讨经伤椎椎弓根固定治疗胸腰椎爆裂性骨折临床效果及治疗体会。方法自2009年6月-2012年6月采用经伤椎椎弓根螺钉内固定治疗胸腰椎爆裂骨折20例,其中男16例,女4例;平均年龄34岁。骨折部位T12为2例,L1为11例、L2为7例。按美国脊髓... 详细信息

目的探讨经伤椎椎弓根固定治疗胸腰椎爆裂性骨折临床效果及治疗体会。方法自2009年6月-2012年6月采用经伤椎椎弓根螺钉内固定治疗胸腰椎爆裂骨折20例,其中男16例,女4例;平均年龄34岁。骨折部位T12为2例,L1为11例、L2为7例。按美国脊髓损伤协会(American Spinal Injury Association,ASIA)脊髓神经功能障碍分级:A级3例,B级3例,C级5例,D级2例,E级7例。手术方法:应用椎弓根钉棒系统进行复位,固定节段包括伤椎及相邻的上、下椎体。结果所有患者术后平均随访20个月(8～36个月),术后伤椎高度由47%恢复至92%,水平移位由18%恢复至0.8%,矢状面Cobb角由23.5°恢复至2.6°。末次随访时ASIA脊髓功能障碍分级:A级3例,B级1例,C级4例,D级5例,E级7例。无神经损伤和内固定破坏等并发症发生。结论经伤椎椎弓根置钉是治疗胸腰椎爆裂骨折的有效方法之一,术中复位简单,术后临床效果满意,值得推广。

关键词：胸腰椎爆裂骨折伤椎椎弓根

Control Flow Obfuscation Based Protection Method for Android Applications

在线全文

学校读者我要写书评

暂无评论

China Communications 2017年第11期14卷 247-259页

作者： Yong Peng guanyu Su Bin tian Maohua Sun Qi Li Beijing University of Posts and Telecommunications No 10 Xitucheng Road Haidian District Beijing 100876 China Beijing KeyLaboratory of Space-ground Interconnection and Convergence No 10 Xitucheng Road Haidian District Beijing 100876 China China Information Technology Security Evaluation Center No 1 Building No 8 Shangdixi Road Haidian District Beijing 100085 China Information School Capital University of Economics and Business No 121 Zhangjia Road Fengtai District Beijing 100070 China

With the popularization and rapid development of mobile intelligent terminals(MITs), the number of mobile applications, or apps, has increased exponentially. It is increasingly common for malicious code to be inserted into counterfeit apps, which can cause significant economic damage and threaten the security of users. Code obfuscation techniques are a highly efficient group of methods for code security protection. In this paper, we propose a novel control flow obfuscation based method for Android code protection. First, algorithms to insert irrelevant code and flatten the control flow are employed that minimize the cost of obfuscation while ensuring its strength. Second, we improve the traditional methods of control flow flattening to further reduce the costs of obfuscation. Lastly, the use of opaque predicates is strengthened by establishing an access control strategy, which converts the identification of opaque predicates in the entire program into a graph traversal problem, and thereby increases the strength of the code protection. We did some experiments to evaluate our method, and the results show that the proposed method can work well.

关键词： control flow obfuscation control flow obfuscation software security

在线全文

学校读者我要写书评

暂无评论

盘状半月板损伤16例关节镜手术与术后康复

创伤与急危重病医学 2014年第3期2卷 154-156页

作者：田冠玉宋磊堂崔运利常旭东任德新路岩解放军第230医院骨科辽宁丹东118000

目的探讨盘状半月板损伤经关节镜手术及术后康复处理的临床效果。方法对2010年2月-2013年2月收治的16例盘状半月板损伤患者进行关节镜手术治疗，通过刨削技术及射频汽化技术，对受损半月板进行部分切除成形，术后予以个体化康复治疗。... 详细信息

目的探讨盘状半月板损伤经关节镜手术及术后康复处理的临床效果。方法对2010年2月-2013年2月收治的16例盘状半月板损伤患者进行关节镜手术治疗，通过刨削技术及射频汽化技术，对受损半月板进行部分切除成形，术后予以个体化康复治疗。结果术后随访20—52周，平均42周。最后一次随访，膝关节功能按Lysholm评分标准进行评定，平均由术前42．5（差）到术后87分（良），膝关节屈曲平均达120°。结论关节镜fF半月板成形术为治疗盘状半月板损伤的有效方法之一，个体化术后康复是获得良好疗效的保证。

关键词：军事训练伤关节镜盘状半月板损伤康复

Aerobic Oxidation of Benzyl Alcohol Catalyzed by Cu-Mn Mixed Oxides and 2,2,6,6-Tetramethyl-piperidyl-1-oxyl

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2007年第2期16卷 210-212页

作者： Yanchun Guo Junfeng Zhao Jinxia Xu Wei Wang Fengshou tian guanyu Yang Maoping Song Department of Chemistry Zhengzhou University Zhengzhou 550052 Henan China Department of Environmental Engineering Zhengzhou Economic Management Institute Zhengzhou 551191 Henan China

Heterogeneous Cu-Mn mixed oxides can mediate TEMPO-catalyzed selective oxidation of benzyl alcohol by molecular oxygen under neutral condition, and is recyclable. In the case of the molar ratio of Cu and Mn over 1, the highly-dispersed CuO inside the Cu-Mn mixed oxides is responsible for the good performances in catalytic oxidation.

关键词： Cu-Mn oxides 2,2,6,6-tetramethyl-piperidyl-l-oxyl aerobic oxidation benzyl alcohol

Double-balanced mixer based on monolayer graphene fieldeffect transistors

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2022年第5期43卷 79-83页

作者： Min Wu Weida Hong guanyu Liu Jiejun Zhang Ziao tian Miao Zhang School of Microelectronics University of Science and Technology of ChinaHefei 230022China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China

Graphene field-effect transistors(GFET) have attracted much attention in the radio frequency(RF) and microwave fields because of its extremely high carrier mobility. In this paper, a GFET with a gate length of 5 μm is fabricated through the van der Walls(vdW) transfer process, and then the existing large-signal GFET model is described, and the model is implemented in Verilog-A for analysis in RF and microwave circuits. Next a double-balanced mixer based on four GFETs is designed and analyzed in advanced design system(ADS) tools. Finally, the simulation results show that with the input of 300 and 280 MHz,the IIP3 of the mixed signal is 24.5 dBm.

关键词： GFET mixer RF simulation IIP3

Progress of optically pumped GaSb based semiconductor disk laser

在线全文

学校读者我要写书评

暂无评论

Opto-Electronic Advances 2018年第2期1卷 9-17页

作者： Shili Shu guanyu Hou Jian Feng Lijie Wang Sicong tian Cunzhu Tong Lijun Wang State Key Lab of Luminescence and Applications Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China

This paper reviewed the development of optically pumped GaSb based semiconductor disk lasers （SDLs） emission at 2 μm wavelength region from the aspects of wavelength extending, power scaling, line-width narrowing and short-pulse generation. Most recently, the wavelength of GaSb based SDLs has been extended to 2.8 μm. The highest output power of the GaSb based SDLs has been reached to 17 W at the temperature of 20 ℃. By using active stabilization, the GaSb based SDL with line-width of 20 kHz and output power of 1 W was realized. Moreover, the shortest pulse obtained fromthe GaSb based SDLs was generated as short as 384 fs by incorporating semiconductor saturable absorber mirrors（SESAM） in the cavity.

关键词： semiconductor disk laser GaSb based 2 μm wavelength