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Multi-layer multi-pass friction rolling additive manufacturing of Al alloy:Toward complex large-scale high-performance components

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 425-438页

作者： Haibin Liu Run Hou chenghao wu Ruishan Xie Shujun Chen College of Mechanical&Energy Engineering Beijing University of TechnologyBeijing 100124China Chongqing Research Institute of Beijing University of Technology Chongqing 401121China

At present,the emerging solid-phase friction-based additive manufacturing technology,including friction rolling additive man-ufacturing(FRAM),can only manufacture simple single-pass *** this study,multi-layer multi-pass FRAM-deposited alumin-um alloy samples were successfully prepared using a non-shoulder tool *** material flow behavior and microstructure of the over-lapped zone between adjacent layers and passes during multi-layer multi-pass FRAM deposition were studied using the hybrid 6061 and 5052 aluminum *** results showed that a mechanical interlocking structure was formed between the adjacent layers and the adja-cent passes in the overlapped center *** friction and rolling of the tool head led to different degrees of lateral flow and plastic deformation of the materials in the overlapped zone,which made the recrystallization degree in the left and right edge zones of the over-lapped zone the highest,followed by the overlapped center zone and the non-overlapped *** tensile strength of the overlapped zone exceeded 90%of that of the single-pass deposition *** is proved that although there are uneven grooves on the surface of the over-lapping area during multi-layer and multi-pass deposition,they can be filled by the flow of materials during the deposition of the next lay-er,thus ensuring the dense microstructure and excellent mechanical properties of the overlapping *** multi-layer multi-pass FRAM deposition overcomes the limitation of deposition width and lays the foundation for the future deposition of large-scale high-performance components.

关键词： aluminum alloy additive manufacturing solid-state friction stir welding multi-layer multi-pass

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CaTiO_(3)-Sm_(0.9)Nd_(0.1)AlO_(3) ceramics with a moderate dielectric constant and a high quality factor prepared by sol-gel auto combustion method

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Journal of Rare Earths 2021年第11期39卷 1427-1434,I0004页

作者： Jiamao Li Minghu Wei chenghao wu Shengdao Tang School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243032China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China School of Mathematics and Physics Anhui University of TechnologyMaanshan 243002China

CaTiO_(3)-LnAlO_(3)(Ln=La,Nd,Sm) is a perovskite-type microwave material system characterized by a moderate dielectric constant εr,a high quality factor Q×f,and a small temperature coefficient of resonant frequency τf,making this system promising for microwave ***,its high synthesis temperature and sintering temperature limit its industrial *** our work,single phase0.7 CaTiO_(3)-0.3 Sm_(0.9)Nd_(0.1)AlO_(3)(7 CT-3 SNA) was synthesized via the sol-gel auto combustion method using citric acid as fuel at a relatively low *** being calcined at 600℃ for 2 h,wellcrystallized 7 CT-3 SNA powders with 30-50 nm average particle size were achieved,suggesting good sintering *** new and narrow order band at about 800 cm^(-1) in the Raman spectra indicates a high ordering degree in the B site of 7 CT-3 SNA solid *** with the solid-state reaction method and co-precipitation method,the 0.7 CT-0.3 SNA ceramics fabricated by the current method possess a much lower calcination temperature,a similar εr value,and an improved Q × f *** optimum microwave dielectric properties of εr=43.54,Q×f=54375 GHz,and τf=-6.3 ×10^(-6)/℃ are obtained for the CTSA ceramics derived from the sol-gel auto combustion ***,the 7 CT-3 SNA ceramics prepared in this study are potential dielectric materials for microwave applications,indicating that the sol-gel auto combustion method is a good alternative strategy for the fabrication of CaTiO_(3)-LnAlO_(3) ceramics.

关键词： Sol-gel auto combustion method Nanopowder Rare earths Microwave ceramics

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Knowledge-enriched joint-learning model for implicit emotion cause extraction

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CAAI Transactions on Intelligence Technology 2023年第1期8卷 118-128页

作者： chenghao wu Shumin Shi Jiaxing Hu Heyan Huang School of Computer Science and Technology Beijing Institute of TechnologyBeijingChina Beijing Engineering Research Center of High Volume Language Information Processing and Cloud Computing Applications BeijingChina

Emotion cause extraction(ECE)task that aims at extracting potential trigger events of certain emotions has attracted extensive attention ***,current work neglects the implicit emotion expressed without any explicit emotional keywords,which appears more frequently in application *** lack of explicit emotion information makes it extremely hard to extract emotion causes only with the local ***,an entire event is usually across multiple clauses,while existing work merely extracts cause events at clause level and cannot effectively capture complete cause event *** address these issues,the events are first redefined at the tuple level and a span-based tuple-level algorithm is proposed to extract events from different *** on it,a corpus for implicit emotion cause extraction that tries to extract causes of implicit emotions is *** authors propose a knowledge-enriched jointlearning model of implicit emotion recognition and implicit emotion cause extraction tasks(KJ-IECE),which leverages commonsense knowledge from ConceptNet and NRC_VAD to better capture connections between emotion and corresponding cause *** on both implicit and explicit emotion cause extraction datasets demonstrate the effectiveness of the proposed model.

关键词： emotion cause extraction external knowledge fusion implicit emotion recognition joint learning

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Yolk-shell Si/C composites with multiple Si nanoparticles encapsulated into double carbon shells as lithium-ion battery anodes

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Journal of Energy Chemistry 2019年第5期28卷 124-130页

作者： Le Hu Bin Luo chenghao wu Pengfei Hu Lianzhou Wang Haijiao Zhang Institute of Nanochemistry and Nanobiology Shanghai UniversityShanghai 200444China Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQLD 4072Australia Laboratory of Microstructure Shanghai UniversityShanghai 200444China

The conceptual design of yolk-shell structured Si/C composites is considered to be an effective way to improve the recyclability and conductivity of Si-based anode materials. Herein, a new type of yolk-shell structured Si/C composite (denoted as TSC-PDA-B) has been intelligently designed by rational engineering and precise control. In the novel structure, the multiple Si nanoparticles with small size are successfully encapsulated into the porous carbon shells with double layers benefiting from the strong etching effect of HF. The TSC-PDA-B product prepared is evaluated as anode materials for lithium-ion batteries (LIBs). The TSC-PDA-B product exhibits an excellent lithium storage performance with a high initial capacity of 2108 mAh g^-1 at a current density of 100 mA g^-1 and superior cycling performance of 1113 mAh g^-1 over 200 cycles. The enhancement of lithium storage performance may be attributed to the construction of hybrid structure including small Si nanoparticles, high surface area, and double carbon shells, which can not only increase electrical conductiv让y and intimate electrical contact with Si nanoparticles, but also provide built-in buffer voids for Si nanoparticles to expand freely without damaging the carbon layer. The present findings can provide some scientific insights into the design and the application of advanced Si-based anode materials in energy storage fields.

关键词： Si/C composites Yolk-shell Multiple Si nanoparticles Double carbon shells Energy storage

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Tannic acid-loaded hydrogel coating endues polypropylene mesh with hemostatic and antiinflammatory capacity for facilitating pelvic floor repair

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Regenerative Biomaterials 2022年第1期9卷 871-887页

作者： chenghao wu Zixuan Zhou Xi You Yi Guo Ping Chen Huaifang Li Xiaowen Tong Department of Obstetrics and Gynecology Tongji HospitalTongji University School of MedicineShanghai 200065People’s Republic of China Department of Burn Surgery The First Affiliated Hospital of Naval Medical UniversityBurn Institute of PLAShanghai 200433People’s Republic of China School of Life Sciences and Technology Tongji UniversityShanghai 200092People’s Republic of China

The application of polypropylene mesh(PPM)in pelvic organ prolapse(POP)treatment was severely limited by the complications associated with PPM,such as mesh exposure,chronic inflammatory reactions and postoperative *** study applied a method of fabricating a hydrogel-mesh complex(PPM+TA@GelMA)to cross-link tannic acid(TA)directly with Methacrylate Gelatin(GelMA)hydrogel and thus to form a coating for *** one-step coating modification improved the hydrophilicity and cyto-compatibility of *** hemostatic effect of PPMtTA@GelMA was confirmed through tail amputation *** the defect tissue repair experiments in vivo,it was proved that PPMtTA@GelMA had effects of anti-inflammation and promoting tissue repair and regulated the M2 subtype macrophages polarization for tissue *** TAloaded hydrogel coating endued PPM with multiple *** is believed that the novel hydrogel-mesh complex and its fabrication method will have great significance in basic research and clinical application.

关键词： tannic acid hydrogel polypropylene mesh pelvic floor repair

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Kinetically accelerated and high-mass loaded lithium storage enabled by atomic iron embedded carbon nanofibers

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Nano Research 2022年第7期15卷 6176-6183页

作者： Qian Xu Yanan Li chenghao wu Xitong Sun Qiang Li Huabin Zhang Le Yu Yuanyuan Pan Yujuan Wang Shiwei Guo Mengdi Zhang Han Hu Mingbo wu State Key Laboratory of Heavy Oil Processing Institute of New EnergyCollege of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071China KAUST Catalysis Center(KCC) Physical Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Lab of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China

Carbonaceous materials represent the dominant choice of materials for anodic lithium storage in many energy storage ***,the nonpolar carbonaceous materials offer weak adsorption toward Li+that largely denies the high-rate Li+***,the atomic Fe sites decorated carbon nanofibers(AICNFs)facilely produced by electrospinning are reported for kinetically accelerated Li+*** calculation reveals that the atomic Fe sites possess coordination unsaturated electronic configuration,enabling suitable bonding energy and facilitated diffusion path of Li+.As a result,the optimal structure displays a high capacitive contribution up to 95.9%at a scan rate of 2.0 mV·s^(−1).In addition,ultrahigh capacity retention of 97%is afforded after 5,000 cycles at a current density of 3 A·g^(−1).Moreover,the interlaced fiber structure enabled by electrospinning benefits structural stability and improved conductivity even at thick electrodes,thus allowing a high areal capacity of 1.76 mAh·cm−2 at a loading of 8 mg·cm−*** of these structure and performance merits,the lithium-ion capacitor containing the AICNF-based anode delivers a high energy density and large power density.

关键词： atomic iron pseudocapacitance high-mass loading electrospinning lithium storage

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Development and validation of a risk-prediction model for immune-related adverse events in patients with non-small-cell lung cancer receiving PD-1/PD-L1 inhibitors

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第10期24卷 935-942页

作者： Qing QIU chenghao wu Wenxiao TANG Longfei JI Guangwei DAI Yuzhen GAO Enguo CHEN Hanliang JIANG Xinyou XIE Jun ZHANG Department of Clinical Laboratory Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310016China Department of Clinical Laboratory Zhejiang Rongjun HospitalJiaxing 314000China Department of Clinical Laboratory Huzhou First People HospitalHuzhou 313000China Key Laboratory of Precision Medicine in Diagnosis and Monitoring Research of Zhejiang Province Hangzhou 310016China Department of Pulmonary and Critical Care Medicine Regional Medical Center for National Institute of Respiratory DiseasesSir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310016China

Lung cancer remains the leading cause of cancer deaths worldwide and is the most common cancer in ***-checkpoint inhibitors(ICIs)that target programmed cell death protein-1(PD-1)or programmed cell death-ligand 1(PD-L1)have achieved impressive efficacy in the treatment of non-small-cell lung cancer(NSCLC)(Pardoll,2012;Champiat et al.,2016;Gao et al.,2022).Although ICIs are usually well tolerated,they are often accompanied by immune-related adverse events(irAEs)(Doroshow et al.,2019).Non-specific activation of the immune system produces off-target immune and inflammatory responses that can affect virtually any organ or system(O'Kane et al.,2017;Puzanov et al.,2017).

关键词： cancer lung

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河南省培育新型农业经营主体的金融政策研究

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金融理论与实践 2019年第8期 100-105页

作者：吴成浩河南工业大学经济贸易学院

发展新型农业经营主体是"三农"改革的重要举措。当前培育新型农业经营主体过程中,金融政策支持存在政府财政补贴扶持不足、金融支持机制设施不健全、融资产品和服务少、保险保障效果低、政策评估和监管不足等问题,建议从金融供给和需求... 详细信息

发展新型农业经营主体是"三农"改革的重要举措。当前培育新型农业经营主体过程中,金融政策支持存在政府财政补贴扶持不足、金融支持机制设施不健全、融资产品和服务少、保险保障效果低、政策评估和监管不足等问题,建议从金融供给和需求两大方面,完善信贷政策、增强财税扶持幅度、健全金融基础设施机制、创新涉农金融机构信贷产品和服务。

关键词：新型农业经营主体金融政策金融支持金融创新

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基于粗集料形状特征的沥青混合料三维数字试件生成

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东南大学学报（自然科学版） 2017年第4期47卷 793-798页

作者：高磊解建光吴成浩陈涛南京航空航天大学航空宇航学院南京210016

为了准确地模拟沥青混合料相关试验,节省集料和试验设备等方面的成本,通过离散单元法模拟生成沥青混合料三维数字试件.采用中心球扩散方法构建出粗集料的扁平比与棱角性,通过调节不同粗集料模型的百分比来获得和实际相近的粗集料形状组... 详细信息

为了准确地模拟沥青混合料相关试验,节省集料和试验设备等方面的成本,通过离散单元法模拟生成沥青混合料三维数字试件.采用中心球扩散方法构建出粗集料的扁平比与棱角性,通过调节不同粗集料模型的百分比来获得和实际相近的粗集料形状组合,并用一定质量的虚拟粗集料"clump"球体块取代同样质量的等效球体来表征粗集料级配特征,通过删除砂浆球体单元来模拟出空隙率特征,最终建立沥青混合料三维离散元模型.研究表明,沥青混合料三维数字试件可以很好地模拟粗集料的三维空间形状,准确表征粗集料的扁平比与棱角性特性,同时能够精确显示粗集料的级配特点与空隙分布,达到以虚拟试件代替真实试件进行试验的目的.

关键词：沥青混合料三维数字试件离散单元法粗集料

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基于PXIe总线技术的电场指纹检测系统设计

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实验技术与管理 2018年第11期35卷 144-148页

作者：李焰吴承昊中国石油大学(华东)机电工程学院山东青岛266580

研制了一套低激励、高精度、一体化的模块化电场指纹检测系统。采用基于PXIe总线的模块化设备搭建硬件系统,在LabVIEW开发环境下编制了图形化测控软件。经实验验证,该系统能准确捕捉金属腐蚀的萌生并且误差小,提高了电场指纹检测实验的... 详细信息

研制了一套低激励、高精度、一体化的模块化电场指纹检测系统。采用基于PXIe总线的模块化设备搭建硬件系统,在LabVIEW开发环境下编制了图形化测控软件。经实验验证,该系统能准确捕捉金属腐蚀的萌生并且误差小,提高了电场指纹检测实验的安全性及准确性、减少了测试时间、提高了检测效率,有益于推广电场指纹技术的应用。

关键词：电场指纹检测 PXIe总线技术软件开发

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