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A METHOD OF PROCESSING DIGITAL CHARACTER NOISE

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电子科学学刊(英文版) 1985年第2期2卷 119-131页

作者：潘保昌吴世昌刘鸿建严光仪王和忱 Chongqing University Chongqing University

Based on the recognition requirement to suppress types of noise created in the conversion processof handwritten characters into binary patterns in our optical character recognition,an algorithmof processing digital c... 详细信息

关键词： NOISE hardware created requirement suppress satisfy characters stored Island utilizing

大型复杂薄壁钛合金铸件熔模精密铸造研究现状及发展

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稀有金属材料与工程 2006年第5期35卷 678-681页

作者：肖树龙陈玉勇朱洪艳田竟吴宝昌哈尔滨工业大学

从钛合金的熔炼、熔模精密铸造技术、钛合金铸造缺陷及检测方面介绍了大型复杂薄壁钛合金铸件精铸技术,大型复杂薄壁钛合金铸件的发展和应用现状,以及相关的铸造技术和充型过程数值模拟的应用,并提出了大型复杂薄壁钛合金铸件熔模精密... 详细信息

从钛合金的熔炼、熔模精密铸造技术、钛合金铸造缺陷及检测方面介绍了大型复杂薄壁钛合金铸件精铸技术,大型复杂薄壁钛合金铸件的发展和应用现状,以及相关的铸造技术和充型过程数值模拟的应用,并提出了大型复杂薄壁钛合金铸件熔模精密铸造的发展趋势。

关键词：大型复杂薄壁钛合金铸件熔模精密铸造数值模拟

国产酮康唑与灰黄霉素治疗皮肤真菌病的双盲对照研究

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中华皮肤科杂志 1990年第2期23卷 117-118页

作者：吴绍熙吴保昌中国医学科学院皮肤病研究所

自1988年起,由江苏省卫生厅药政局统一安排我们试用上海医药工业研究院设计和南京第二制药厂试制的国产酮康唑,以双盲、分层随机进行分组,治疗皮肤真菌病184例,另以灰黄霉素治疗皮肤真菌病171例进行对照,现将初步结果,简要总结如下.

关键词：皮肤真菌病酮康唑灰黄霉素

Ballistic performances of the hourglass lattice sandwich structures under high-velocity fragments

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Defence Technology（防务技术） 2024年第1期31卷 312-325页

作者： He-xiang wu Jia Qu Lin-zhi wu Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin150001China School of Civil Engineering Northeast Forestry UniversityHarbin150040China

In this paper,the numerical simulation method is used to study the ballistic performances of hourglass lattice sandwich structures with the same mass under the vertical incidence of *** is paid to elucidating the influences of rod cross-section dimensions,structure height,structure layer,and rod inclination angle on the deformation mode,ballistic performances,and ability to change the ballistic direction of *** results show that the ballistic performances of hourglass lattice sandwich structures are mainly affected by their structural *** this respect,structural parameters optimization of the hourglass lattice sandwich structures enable one to effectively improve their ballistic limit velocity and,consequently,ballistic performances.

关键词： Hourglass lattice sandwich structures Ballistic performances high-velocity Finite element analysis

Resilience-incorporated seismic risk assessment of precast concrete frames with“dry”connections

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 403-425页

作者： wu Chenhao Tang Yuchuan Cao Xuyang wu Gang Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Nanjing 211102China Department of Civil and Environmental Engineering University of CaliforniaLos AngelesCA 90095USA School of Civil Engineering Southeast UniversityNanjing 211102China College of Civil and Transportation Engineering Hohai UniversityNanjing 210024China

A resilience-incorporated risk assessment framework is proposed and demonstrated in this study to manifest the advantageous seismic resilience of precast concrete frame(PCF)structures with“dry”connections in terms of their low damage and rapid *** framework integrates various uncertainties in the seismic hazard,fragility,capacity,demand,loss functions,and post-earthquake *** this study,the PCF structures are distinguished from ordinary reinforced concrete frame(RCF)structures by characterizing multiple limit states for the PCF based on its unique damage ***,probabilistic story-wise pushover analyses are performed to yield story-wise capacities for the predefined limit *** the seismic resilience analysis,a step-wise recovery model is proposed to idealize the functionality recovery process,with separate considerations of the repair and non-repair *** recovery model leverages the economic loss and downtime to delineate the stochastic post-earthquake recovery curves for the resilience loss *** such,contingencies in the probabilistic post-earthquake repairs are incorporated and the empirical judgments on the recovery parameters are largely *** proposed framework is demonstrated through a comparative study between two“dry”connected PCFs and one RCF designed as alternative structural systems for a prototype *** results from the risk quantification indicate that the PCFs show reduced loss hazards and lower expected losses relative to the ***,the PCF equipped with energy dissipation devices at the“dry”connections largely reduces the expected economic loss,downtime,and resilience loss by 29%,56%,and 60%,respectively,compared to the RCF.

关键词： precast concrete frame non-emulative precast system seismic resilience seismic risk functional recovery

孔隙对碳纤维/环氧复合材料层合板层间剪切疲劳性能的影响

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复合材料学报 2010年第6期27卷 32-37页

作者：朱洪艳吴宝昌张东兴李地红陈玉勇哈尔滨工业大学材料科学与工程系哈尔滨150001 哈尔滨飞机工业集团有限公司哈尔滨150060

研究了孔隙对碳纤维增强环氧树脂基复合材料层合板[(±45)/04/(0,90)/02]S的静态层间剪切强度和层间剪切疲劳性能的影响。采用不同的热压罐压力制备了孔隙率为0.4%～6.6%的试样。采用显微照相法和图像分析技术对孔隙率和孔隙的微观形貌... 详细信息

研究了孔隙对碳纤维增强环氧树脂基复合材料层合板[(±45)/04/(0,90)/02]S的静态层间剪切强度和层间剪切疲劳性能的影响。采用不同的热压罐压力制备了孔隙率为0.4%～6.6%的试样。采用显微照相法和图像分析技术对孔隙率和孔隙的微观形貌进行了分析。研究结果表明,随着热压罐压力的降低,大孔隙(S>7.85×10-3mm2)所占的比例逐渐增加,平均孔隙率增加。在孔隙率为0.4%～6.6%时,每增加1%,复合材料层压板的层间剪切强度下降2.4%。随着孔隙率的增加,层压板的疲劳寿命降低。与静态试验相比,孔隙率对层压板疲劳性能的影响比对静态性能的影响大。大孔隙的存在促进了疲劳裂纹的产生和扩展。

关键词：聚合物基复合材料孔隙率疲劳层间剪切强度孔隙尺寸

孔隙率对碳纤维/环氧树脂复合材料层合板湿热性能的影响

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复合材料学报 2010年第2期27卷 24-30页

作者：朱洪艳李地红张东兴吴宝昌陈玉勇哈尔滨工业大学材料科学与工程系哈尔滨150001 哈尔滨飞机工业集团有限公司哈尔滨150060

针对某飞机上应用的典型铺层[（±45）4/（0,90）/（±45）2]S和[（±45）/（0,90）2/（±45）]S,研究了孔隙对碳纤维增强环氧树脂基复合材料层合板的吸湿行为和层间剪切强度的影响。采用不同的热压罐固化压力制备了不同孔隙率的试样。... 详细信息

针对某飞机上应用的典型铺层[（±45）4/（0,90）/（±45）2]S和[（±45）/（0,90）2/（±45）]S,研究了孔隙对碳纤维增强环氧树脂基复合材料层合板的吸湿行为和层间剪切强度的影响。采用不同的热压罐固化压力制备了不同孔隙率的试样。采用显微图像分析技术对孔隙率和孔隙的微观结构特征进行了详细的分析。研究结果表明：孔隙主要分布于层间,且随着孔隙率的增大,孔隙的尺寸增大;2种层合板的吸湿率和最大吸湿量随着孔隙率的增加而增加;湿热老化和未经湿热老化的层间剪切强度都随着孔隙率的增加而下降。铺层[（±45）4/（0,90）/（±45）2]S未经湿热和湿热后的层间剪切强度随着孔隙率增加分别下降6%（孔隙率：0.6%-6.3%）和9%（孔隙率：0.4%-7.0%）;铺层[（±45）/（0,90）2/（±45）]S未经湿热和湿热后的层间剪切强度随着孔隙率增加分别下降14%（孔隙率：0.4%-6.9%）和7%（孔隙率：0.2%-8.9%）。

关键词：聚合物基复合材料孔隙率环境退化力学性能

New findings on the influence of El Nino events on tropical cyclone formation

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Science China Earth Sciences 2024年第3期67卷 892-893页

作者： Liguang wu Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China

Tropical cyclones typically form over warm tropical and subtropical ocean surfaces, as their formation and intensification rely primarily on the energy provided by the ocean. Pioneering research by Gray (1968) revealed that the formation of tropical cyclones requires the sea surface temperature (SST) to be no less than 26.5℃. Consequently, SST is commonly recognized as a crucial parameter among the environmental factors influencing tropical cyclone formation(Gray, 1979;Emanuel and Nolan, 2004).

关键词： tropical cyclone ocean

Two-dimensional semiconductor heterostructures for photocatalytic CO_(2)conversion

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Science China Chemistry 2024年第8期67卷 2434-2447页

作者： Yang wu Mingyu wu Yongfu Sun Yi Xie Hefei National Research Center for Physical Sciences at Microscale University of Science and Technology of ChinaHefei 230026China

The CO_(2)reduction into carbon-contained fuel via solar energy offers the powerful tools to realize the zero-emission carbon *** to the intriguing features of the two-dimensional(2D)heterostructures,it is susceptible to modulate the electronic structure as well as the surface geometry for optimizing the photocatalytic CO_(2)*** this perspective,we surveyed the fundamental insights of 2D semiconductor heterostructures,involving the fabrication strategies and classification of the 2D semiconductor ***,we have detailly discussed the overview of 2D semiconductor heterostructure for optimizing CO_(2)photocatalytic influenced factors,including the solar energy utilization,photogenerated carriers separation,and redox reaction ***,we showed the significant advantages of 2D heterostructures in elevating CO_(2)photoreduction performance,focusing on activity,selectivity and *** analyzing the limitations and developments,we ended by putting forward insights into the further researches about the CO_(2)photocatalysts and reactor design,even industrial applications.

关键词： two-dimensional semiconductor heterostructures photocatalysis CO_(2)conversion