检索结果-南通市图书馆

scratch-concerned yield modeling for IC manufacturing involved with a chemical mechanical polishing process

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第5期13卷 376-384页

作者： Jiao-jiao ZHU Xiao-hua LUO Li-sheng CHEN Yi YE Xiao-lang YAN Institute of VLSI Design .Zhefiang UniversityHangzhou 310027China

In existing integrated circuit (IC) fabrication methods,the yield is typically limited by defects generated in the manufacturing *** fact,the yield often shows a good correlation with the type and density of the *** a result,an accurate defect limited yield model is essential for accurate correlation analysis and yield *** real defects exhibit a great variety of shapes,to ensure the accuracy of yield prediction,it is necessary to select the most appropriate defect model and to extract the critical area based on the defect *** the realistic outline of scratches introduced by the chemical mechanical polishing (CMP) process,we propose a novel scratch-concerned yield model.A linear model is introduced to model *** on the linear model,the related critical area extraction algorithm and defect density distribution are *** to higher correspondence with the realistic outline of scratches,the linear defect model enables a more accurate yield prediction caused by scratches and results in a more accurate total product yield prediction as compared to the traditional circular model.

关键词： Chemical mechanical polishing (CMP) scratch Defect Yield model Critical area

Subsurface Damage in scratch Testing of Potassium Dihydrogen Phosphate Crystal

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2009年第1期22卷 15-20页

作者： WANG Ben WU Dongjiang GAO Hang KANG Renke GUO Dongming Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education Dalian University of Technology Dalian 116024 China

Potassium dihydrogen phosphate （KDP） is an important electro-optic crystal, often used for frequency conversion and Pockels cells in large aperture laser systems. To investigate the influence of anisotropy to the depth of subsurface damage and the profiles of cracks in subsurface of KDP crystal, an experimental study was made to obtain the form of subsurface damage produced by scratches on KDP crystal in [100], [120] and [110] crystal directions on （001） crystal plane. The results indicated that there were great differences between depth and crack shape in different directions. For many slip planes in KDP, the plastic deformation and cracks generated under pressure in the subsurface were complex. Fluctuations of subsurface damage depth at transition point were attributed to the deformation of the surface which consumed more energy when the surface deformation changed from the mixed region of brittle and plastic to the complete brittle region along the scratch. Also, the process of subsurface damage from shallow to deep, from dislocation to big crack in KDP crystal with the increase of radial force and etch pit on different crystal plane were obtained. Because crystallographic orientation and processing orientation was different, etching pits on （100） crystal plane were quadrilateral while on （110） plane and （120） plane were trapezoidal and triangular, respectively.

关键词： potassium dihydrogen phosphate (KDP) crystal scratch subsurface damage

Towards Data-Driving Multi-View Evaluation Framework for scratch

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2024年第2期29卷 517-528页

作者： Xiaolin Chai Yan Sun Yan Gao Department of Computer Science Beijing University of Posts and TelecommunicationBeijing 100876China Intellectual Property Institute Shandong Polytechnic CollegeJining 272067China

As one of the most popular visual programming languages,scratch has a lot of evaluation around *** evaluation can help programmers understand their projects *** the same time,it can also provide a reference for them to browse other projects in the online *** of the existing evaluations on scratch are carried from three perspectives:Computational Thinking(CT)ability,visual presentation aesthetics,and code *** them,the assessment of CT and code quality is mainly carried out from the program script,while the evaluation of visual aesthetics is analyzed from the perspective of image sequences generated by project *** single-view evaluation focuses on the performance of a program in a certain aspect and is *** this paper,we propose a multi-view evaluation framework to integrate various evaluations using different *** quantitatively analyze the assessment of different views driven by *** with overall evaluations that represent human opinions,we analyze their differences and *** experiments,we determine the weights of different integration policies,the proposed multi-view evaluation method can generate evaluation results similar to human opinions.

关键词： scratch Computational Thinking(CT) visual aesthetic static analysis integration policy machine learning

Cat scratch disease in childhood: a 10-year experience of an Italian tertiary care children’s hospital

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Pediatrics 2023年第2期19卷 189-193页

作者： Lara Fusani Elisabetta Venturini Elena Chiappini Luisa Galli Postgraduate School of Pediatrics University of FlorenceMeyer Children’s HospitalFlorenceItaly Infectious Diseases Unit Meyer Children’s HospitalViale Pieraccini 24FlorenceItaly Department of Health Sciences University of FlorenceFlorenceItaly

Cat scratch disease(CSD),an infection caused by Bartonella henselae,is uncommon in Europe,whereas 24,000 cases per year have been reported in the United States[1,2].The typical manifestation of CSD consists of fever and subacute,solitary or regional,painful and self-limited lymphadenopathy in a patient with a history of previous scratching,biting,or contact with a kitten or cat[3].In 85%of patients,only one regional lymph node is involved,which is located in the axillary and epitrochlear regions in approximately half of the cases[4,5].One or more round,red-brown nontender papules can develop at the inoculation site or near the scratch after a few days and may persist until two to three weeks[6].

关键词： Italian scratch Barton

Tribology behavior on scratch tests: Effects of yield strength

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2017年第1期5卷 108-114页

作者： Biao FENG Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87544 USA

A three-dimensional (3D) scratch model is proposed to investigate the effects of yield strength of both coatings and *** the help of combined Coulomb and plastic friction,the obtained results comprehensively interpret the experimental phenomena in most metals that with the growth of hardness after heat treatment the scratch friction coefficient (SFC) *** interpretation could not be done *** tests on the surface with or without the coating are *** the coating the SFC increases due to the decrease of the area with plastic slippage and/or the increase of friction stress during the increase of the yield strength in the *** a softer substrate the friction stress decreases but the SFC increases,which is caused by the growth of the entire contact area and surface ***,with a stronger substrate the SFC decreases due to an intensified plastic *** obtained results pave a new way to understanding the effects of yield strength on scratch tests,interpret experimental phenomena,and should be helpful for an optimum design in experiments.

关键词： tribology behavior yield strength coating scratch finite element method

More than scratching the Surface:Recent Progress in Brain Mechanisms Underlying Itch and scratch

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2020年第1期36卷 85-88页

作者： Xu Liu Xiu-Hua Miao Tong Liu The Affiliated Zhangjiagang Hospital of Soochow University Zhangjiagang 215600China Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience Soochow UniversitySuzhou 215021China College of Life Sciences Yanan UniversityYanan 716000China

Itch(also called pruritus)is an unpleasant somatosensation that evokes a desire or reflex to scratch in humans and other mammals[1],Itch is now considered to be a unique sensory modality that is encoded by a labeled line that has genetically distinguishable neurons in the peripheral and central nervous systems[1],Acute itch evokes scratching that may help to remove potentially harmful irritants from the skin,which is believed to be evolutionarily important for *** chronic itch often occurs in patients with inflammatory skin diseases,systemic diseases,and neurological ***,chronic itch causes uncontrollable itch-scratch cycles that induce skin damage,affect sleep,and seriously reduce the quality of life[2].At present,effective treatment for chronic itch is still lacking,possibly due to limited understanding of the mechanism of itch information-processing in the nervous ***,elucidation of the molecular,cellular,and circuitry mechanisms of itch will eventually help to develop new effective strategies for the management of chronic itch.

关键词： scratch eventually lying

PIEZO1 channels in cutaneous free nerve endings:novel insights into itch-scratch-mechanisms

在线全文

学校读者我要写书评

暂无评论

Signal Transduction and Targeted Therapy 2023年第2期8卷 319-320页

作者： Manuel Pedro Pereira Henning Wiegmann Sonja Ständer Department of Dermatology and Center for Chronic Pruritus University Hospital Münster48149MünsterGermany

A recent study published in Nature by Hill et al.1 identified mechano-sensitive PIEZO1 ion channels in pruriceptive ***,PIEZO1 is involved in acute itch transmission and in mechanical alloknesis in chronic pruritus(CP... 详细信息

关键词： ZO1 insight scratch

基于标签关联性的多标签scratch分类算法

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

北京邮电大学学报 2019年第6期42卷 134-141页

作者：彭聪孙岩戚鹏北京邮电大学计算机学院北京100876

为了实现scratch可视化编程领域的作品分类,提出了一种基于标签关联性的多标签分类算法(MLLR),构建了一个有效的多标签scratch分类模型.首先提取作品的Block使用特征、计算思维技能特征和复杂度特征3类特征作为分类特征;然后针对RAKEL... 详细信息

为了实现scratch可视化编程领域的作品分类,提出了一种基于标签关联性的多标签分类算法(MLLR),构建了一个有效的多标签scratch分类模型.首先提取作品的Block使用特征、计算思维技能特征和复杂度特征3类特征作为分类特征;然后针对RAKEL算法随机选择标签子集,忽略了标签间的关联性,提出了改进的MLLR算法,该方法根据多标签之间的关联性来划分标签子集,再训练相应的标签幂集子分类器.实验结果表明,MLLR算法在分类性能和时间性能上优于RAKEL等多标签分类算法,构建的分类模型对于scratch作品具有较强的适用性,分类的准确率达到81.3%.

关键词： scratch 标签关联性多标签分类分类模型

Effect of scratch on corrosion resistance of calcium phosphate conversion coated AZ80 magnesium alloy

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2022年第1期32卷 147-161页

作者： Xue-jiao JIA Jiang-feng SONG Xiao-rong QU Fu-yong CAO Bin JIANG Andrej ATRENS Fu-sheng PAN State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China National Engineering Research Center for Magnesium Alloy Chongqing UniversityChongqing 400044China Qinghai Salt Lake Industry Co. Ltd.Qinghai 816000China Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityXiamen 361005China School of Mechanical and Mining Engineering The University of QueenslandBrisbane Qld 4072Australia

In order to analyze the effect of scratch on the corrosion behaviour of a calcium phosphate conversion coating(CPCC)on AZ80,the electrochemical testing,scanning vibrating electrode technique(SVET),immersion test and hydrogen evolution experiment were performed to study the corrosion resistance of AZ80,AZ80 with CPCC and coated AZ80 with *** results show that the coating improves the corrosion resistance of the AZ80 from a current density of(85±4)to(4±1)μA/cm^(2).When the coating was damaged,its protection on substrate would be *** scratch with a length of around 12 mm on the coating reduced the corrosion resistance to a current density of(39±1)μA/cm^(2).In addition,the corrosion occurred initially in the scratch area and the corrosion site first occurred at the junction of the scratch and the ***,the micro corrosion mechanism of the specimen containing scratch was clarified.

关键词： magnesium alloy AZ80 alloy scratch conversion coating corrosion resistance scanning vibrating electrode technique(SVET)