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Journal of Advanced Ceramics 2023年第1期12卷 169-181页

作者： Zhang-Ao shi Jia-Min WU Zhi-qiang FANG Yu-Sheng shi State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of EducationWuhan 430074China

Fabrication of silicon carbide(SiC)ceramics by digital light processing(DLP)technology is difficult owing to high refractive index and high ultraviolet(UV)absorptivity of SiC *** surface of the SiC powders can be coated with silicon oxide(SiO_(2))with low refractive index and low UV absorptivity via high-temperature oxidation,reducing the loss of UV energy in the DLP process and realizing the DLP preparation of the SiC ***,it is necessary to explore a high-temperature modification process to obtain a better modification effect of the SiC ***,the high-temperature modification behavior of the SiC powders is thoroughly investigated in this *** results show that nano-scale oxide film is formed on the surface of the SiC powders by short-time high-temperature oxidation,effectively reducing the UV absorptivity and the surface refractive index(nʹ)of the SiC *** the oxidation temperature is 1300℃,compared with that of unoxidized SiC powders,the UV absorptivity of oxidized SiC powders decreases from 0.5065 to 0.4654,and a curing depth of SiC slurry increases from 22±4 to 59±4μ***,SiC green bodies are successfully prepared by the DLP with the the oxidized powders,and flexural strength of SiC sintered parts reaches 47.9±2.3 MPa after 3 h of atmospheric sintering at 2000℃without any sintering aid.

关键词： silicon carbide(SiC)powders oxidation modification digital light processing(DLP) ultraviolet(UV)absorptivity curing depth

Properties and strengthening mechanism of brush plated nanoparticle reinforced composite coatings

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 182-185页

作者： DONG shi-yun XU Bin-shi MA shi-ning TU Wei-yi National Key Laboratory for Remanufacturing Academy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China National Key Laboratory for RemanufacturingAcademy of Armored Force Engineering Beijing 100072 China

Nanoparticle reinforced nickel matrix composite coatings, such as n-Al2O3/Ni, n-SiO2/Ni, n-SiC/Ni and n-TiO2/Ni, were fabricated by brush plating technique. Hardness, wear resistance and contact-fatigue resistance of the composite coatings were determined, and strengthening mechanism of the composite coatings was discussed. Results show that the composite coatings have superior properties to the Ni metal coating. Compared with properties of brush plated Ni metal coating, the composite coatings have hardness over 1.5 times and wear resistance capability of about 2.5 times. The strengthening mechanism of the composite coatings mainly includes fine-crystal grain effect, nanoparticle dispersion effect and dislocation effect.

关键词： nanoparticles brush plated coatings strengthening mechanism

Agent-based effectiveness evaluation method and impact analysis of airborne laser weapon system in cooperation combat

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Chinese Journal of Aeronautics 2023年第4期36卷 442-454页

作者： Likuan shi Yang PEI Qijia yun Yuxue GE School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Beijing Institute of Astronautical Systems Engineering Beijing 100076China

The laser weapons will play a special role in the future high-tech *** study the impact of airborne laser weapon on the System-of-System(SoS)effectiveness in cooperative com-bat,this paper proposes an indicator construction method based on the combination of the weapon capability indicator system and the combat *** indicator system of capability is divided into 4 layers by the bottom-to-up generation mechanism of *** can describe the logical relationship between the indicator layers from a qualitative *** with the 4 layers capability indicator system,a hierarchical framework of airborne laser weapon is established by the agent-based modeling and *** analyses show that the SoS effectiveness improves with the increase of the laser weapon output power,the laser launcher diameter,and the photoelectric sensor *** the SoS effectiveness promotion brought by the photoelectric sensor pixel is *** results can be used for the development of tactical airborne laser weapon.

关键词： Agent modelling Effectiveness evaluation Hierarchical modularization Laser weapon System of system

Incidence,Survival Outcome,and Prognostic Nomogram of Patients with Angioimmunoblastic T-cell Lymphoma:a Population-based Analysis

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Current Medical Science 2022年第6期42卷 1220-1230页

作者： Hai-zhu CHEN yun-xia TAO Yu ZHOU Qiao-feng ZHONG Li-qiang ZHOU Yuan-kai shi Department of Medical Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted DrugsBeijing100021China

Objective Due to the rarity of angioimmunoblastic T-cell lymphoma(AITL),very limited data concerning its incidence patterns and prognostic factors are *** study aimed to explore the incidence,characteristics,survival outcomes,and prognostic factors of *** Age-adjusted incidence and temporal trends were calculated based on 1247 AITL patients from the National Cancer Institute’s Surveillance,Epidemiology,and End Results(SEER)-13 database.A total of 1525 AITL patients from the SEER-18 database and 43 patients from our single center were included for survival analysis and nomogram *** The age-adjusted incidence for overall cohort was 0.123[95%confidence interval(CI),0.117–0.131)per 100000 during 1992–*** overall incidence increased steeply at the rate of 15.3%(95%CI 11.0%–19.8%,P<0.001)per year during 1992–2004,but remained stable during 2004–2017(P=0.200).Similar incidence trends were observed in age,sex,and stage *** final nomograms consisted of four variables:age at diagnosis,sex,Ann Arbor stage,and primary *** concordance index(C-index)of the nomogram for 5-year overall survival prediction was 0.717,0.690 and 0.820 in the training cohort,validation cohort-1 and cohort-2,*** the disease-specific survival(DSS),the nomogram also demonstrated a good discrimination level,with the C-index for predicting the probability of DSS at 5 years of 0.716,0.682 and 0.813 for the three cohorts,*** calibration displayed good concordance between the nomogram-predicted and actual observed *** The age-adjusted incidence for AITL was low during 1992–*** incidence continuously increased during 1992–2004,but remained stable during 2004–*** nomograms as proposed may provide a favorable and accurate prognostic survival prediction in AITL.

关键词： angioimmunoblastic T-cell lymphoma incidence prognosis nomogram SEER

Coupled elasto-plasticity damage constitutive models for concrete

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第4期14卷 256-267页

作者： qiang XU Jian-yun CHEN Jing LI Gang XU State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology School of Civil and Hydraulic Engineering Dalian University of Technology Plan and Design Institute of Daqing Oilfield Communication Company

The paper is to design and construct a coupled elasto-plasticity damage constitutive model for *** on the energy dissipation principle,the Hsieh-Ting-Chen four-parameter yield function is *** model can reflect different strength characteristics of concrete in tension and compression,and reduce the limitation and lacuna of the traditional damage constitutive models for ***,numerical test for concrete stress-strain relation under uniaxial tension and compression is ***,the damage process of concrete gravity dam is calculated and analyzed in seismic *** with other damage constitutive models,the proposed model contains only one unknown parameter and the other parameters can be found in the Hsieh-Ting-Chen four-parameter yield *** same damage evolution law,which is used for tension and compression,is good for determining stress-strain constitutive and damage characteristics in complex stress *** coupled damage constitutive models can be applied in analyzing damage of concrete gravity dam and arch dam.

关键词： Concrete Damage constitutive models Hsieh-Ting-Chen four-parameter yield function Uniaxial tension Uniaxial compression Gravity dam Arch dam

Optimizing Strength and Ductility of Titanium Alloys by Oxygen: Review and Prospect

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Chinese Journal of Structural Chemistry 2020年第4期39卷 615-622页

作者： CAI Ze-yun LI Kun XIE Guo-qiang School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055China

The traditional strengthening elements of titanium alloys include Al,Mo,V,etc.,however,the high cost and toxicity of these elements put a limit on their further applications for *** light elements such as oxygen are hopeful replacement due to high *** is recognized that the oxygen enhances the strength but pays the price of brittleness,thus the amount of oxygen is ***,recent study results indicated that excess oxygen can keep high ductility together with high strength of *** paper reviews the influence and the mechanism of oxygen on the strength and ductility of titanium alloys,and provides a new perspective for the strengthening method of titanium alloys.

关键词： oxygen strength ductility titanium alloy

Terahertz superconducting kinetic inductance detectors demonstrating photon-noise-limited performance and intrinsic generation-recombination noise

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Science China(Physics,Mechanics & Astronomy) 2022年第3期65卷 106-113页

作者： Qing shi Jing Li qiang Zhi Zheng Wang Wei Miao Sheng-Cai shi Purple Mountain Observatory Chinese Academy of SciencesNanjing 210034China School of Astronomy&Space Science University of Science and Technology of ChinaHefei 230026China

The development of large-format detector arrays with background-limited performance is of particular interest at the terahertz(THz) band, which is a unique band in search of our cosmic origins. With high sensitivity and being more promising in the pixel number and multiplexing technology, superconducting kinetic inductance detectors(KID) are emerging as a major choice of detectors of this type. Here we fabricate three-THz-band(0.35/0.85/1.4 THz) KIDs on a single chip from a 120-nm-thick aluminum(Al) superconducting film and measure photon-noise-limited performance and intrinsic generation-recombination noise at high(>1 p W) and low(<1 f W) optical radiation power, respectively. Their responses to blackbody(optical) radiation are proven to be purely from photons compared with the responses of two dark KIDs intentionally arranged on the same detector chip. The lowest optical noise equivalent power(NEP) reaches 6×10^(-18)W/Hz^(0.5)and the optical coupling efficiency is in the range of 49%-56% for the three KIDs, which are in good agreement with the simulation results.

关键词： terahertz kinetic inductance detectors(KID) photon-noise generation-recombination noise

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Advances in Journal of Geriatric Cardiology over the course of a decade

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Journal of Geriatric Cardiology 2020年第12期17卷 733-739页

作者： qiang WU Lai-Fu LI yun-Dai CHEN Institute of Geriatric Cardiology Chinese PLA General HospitalBeijingChina Department of Cardiology Chinese PLA General HospitalBeijingChina Journal of Geriatric Cardiology Editorial Office Chinese PLA General HospitalBeijingChina

The Journal of Geriatric Cardiology(JGC,ISSN 1671-5141/CN 11-5329/R)is a monthly,open-access,international,and peer-reviewed journal sponsored and published by the Institute of Geriatric Cardiology affiliated with Chinese PLA General *** was created in 2004 by ***-Wen WANG,and as the current editor-in-chief,***-Dai CHEN has been involved in JGC for eight years and has achieved impressive advancements.

关键词： Bibliometrics Citation analysis Journal of Geriatric Cardiology Peer review Research hotspots

Representation learning via an integrated autoencoder for unsupervised domain adaptation

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Frontiers of Computer Science 2023年第5期17卷 75-87页

作者： Yi ZHU Xindong WU Jipeng qiang yunhao YUAN yun LI School of Information Engineering Yangzhou UniversityYangzhou 225127China Key Laboratory of Knowledge Engineering with Big Data(Ministry of Education of China) Hefei University of TechnologyHefei 230009China School of Computer Science and Information Engineering Hefei University of TechnologyHefei 230601China

The purpose of unsupervised domain adaptation is to use the knowledge of the source domain whose data distribution is different from that of the target domain for promoting the learning task in the target *** key bottleneck in unsupervised domain adaptation is how to obtain higher-level and more abstract feature representations between source and target domains which can bridge the chasm of domain ***,deep learning methods based on autoencoder have achieved sound performance in representation learning,and many dual or serial autoencoderbased methods take different characteristics of data into consideration for improving the effectiveness of unsupervised domain ***,most existing methods of autoencoders just serially connect the features generated by different autoencoders,which pose challenges for the discriminative representation learning and fail to find the real cross-domain *** address this problem,we propose a novel representation learning method based on an integrated autoencoders for unsupervised domain adaptation,called *** capture the inter-and inner-domain features of the raw data,two different autoencoders,which are the marginalized autoencoder with maximum mean discrepancy(mAE)and convolutional autoencoder(CAE)respectively,are proposed to learn different feature *** higher-level features are obtained by these two different autoencoders,a sparse autoencoder is introduced to compact these inter-and inner-domain *** addition,a whitening layer is embedded for features processed before the mAE to reduce redundant features inside a local *** results demonstrate the effectiveness of our proposed method compared with several state-of-the-art baseline methods.

关键词： unsupervised domain adaptation representation learning marginalized autoencoder convolutional autoen-coder sparse autoencoder

Review of solution growth techniques for 4H-SiC single crystal

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China Foundry 2023年第2期20卷 159-178页

作者： Gang-qiang Liang Hao Qian Yi-lin Su Lin shi qiang Li Yuan Liu School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing Technology(Ministry of Education) Beijing 100084China

Silicon carbide(SiC),a group IV compound and wide-bandgap semiconductor for high-power,high-frequency and high-temperature devices,demonstrates excellent inherent properties for power devices and specialized high-end *** growth is thermodynamically favorable for producing SiC single crystal ingots with ultra-low dislocation density as the crystallization is driven by the supersaturation of carbon dissolved in Si-metal ***,solution growth is conducive to the growth of both N-and P-type SiC,with doping concentrations ranging from 10^(14)to 10^(19)cm^(-3).To date,4-inch 4H-SiC substrates with a thickness of 15 mm produced by solution growth have been unveiled,while substrates of 6 inches and above are still under *** on top-seeded solution growth(TSSG),several growth techniques have been developed including solution growth on a concave surface(SGCS),melt-back,accelerated crucible rotation technique(ACRT),two-step growth,and facet ***-parameters of the solution growth including meniscus,solvent design,flow control,dislocation conversion,facet growth,and structures of graphite components make high-quality single crystal growth *** this paper,the solution growth techniques and corresponding parameters involved in SiC bulk growth were reviewed.

关键词： wide-bandgap semiconductor silicon carbide bulk growth of single crystal process parameters