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High-Efficiency Dynamic Scanning Strategy for Powder Bed Fusion by Controlling Temperature Field of the Heat-Affected Zone

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 203-214页

作者： Xiaokang Huang xiaoyong Tian Qi Zhong Shunwen He Cunbao Huo Yi cao Zhiqiang Tong Dichen Li State Key Laboratory of Manufacturing Systems Engineering Xi’an Jiaotong UniversityXian 710049China

Improvement of fabrication efficiency and part performance was the main challenge for the large-scale powder bed fusion(PBF)*** this study,a dynamic monitoring and feedback system of powder bed temperature field using an infrared thermal imager has been established and integrated into a four-laser PBF equipment with a working area of 2000 mm×2000 *** heat-affected zone(HAZ)temperature field has been controlled by adjusting the scanning speed ***,the relationship among spot size,HAZ temperature,and part performance has been *** fluctuation of the HAZ temperature in four-laser scanning areas was decreased from 30.85℃to 17.41℃.Thus,the consistency of the sintering performance of the produced large component has been *** on the controllable temperature field,a dynamically adjusting strategy for laser spot size was proposed,by which the fabrication efficiency was improved up to 65.38%.The current research results were of great significance to the further industrial applications of large-scale PBF equipment.

关键词： Powder bed fusion Efficiency Large-scale Spot size Heat-affected zone(HAZ)

心理干预对飞行人员非龋性牙颈部中度缺损治疗的疗效观察

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空军医学杂志 2021年第2期37卷 131-132页

作者：黄玉婷董丽王超王丽琴赵艳红曹小勇联勤保障部队第九八八医院口腔科郑州450000 联勤保障部队第九八八医院特勤科郑州450000

目的探讨心理干预辅助治疗飞行人员非龋性牙颈部中度缺损的临床效果。方法将非龋性牙颈部中度缺损合并心理问题的飞行人员45例(216颗牙齿),随机分为干预组23例(112颗牙齿)和对照组22例(104颗牙齿);干预组在常规治疗后给予持续综合心理干... 详细信息

目的探讨心理干预辅助治疗飞行人员非龋性牙颈部中度缺损的临床效果。方法将非龋性牙颈部中度缺损合并心理问题的飞行人员45例(216颗牙齿),随机分为干预组23例(112颗牙齿)和对照组22例(104颗牙齿);干预组在常规治疗后给予持续综合心理干预,对照组无心理干预。观察治疗后3、6个月和1年,对2组飞行人员牙颈部缺损充填体脱落情况。结果2组治疗后3个月充填体脱落率差异无统计学意义(P>0.05);治疗后6个月差异有统计学意义(P<0.05);治疗后1年差异有显著统计学意义(P<0.01)。结论综合心理干预辅助治疗可以提高飞行人员非龋性牙颈部中度缺损的临床疗效。

关键词：心理干预飞行人员非龋性牙颈部中度缺损

电感耦合等离子体原子发射光谱法测定金覆盖层产品金质量及金厚度方法研究

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中国宝玉石 2024年第3期 2-7页

作者：杨桂群黄栩峤曹小勇谢明隆零鸿儒黄靖宇李俞彤南京市产品质量监督检验院国家金银制品质量检验检测中心(南京) 南京210028 深圳市宁深检验检测技术有限公司深圳518020

随着金价高涨,黄金成为舆论的焦点。市面上金覆盖层产品推陈出新,市占率增加,其检测需求也逐年增大。本实验对金覆盖层产品样品前处理方法进行改进,极大的简化了前处理流程,利用电感耦合等离子体原子发射光谱法(ICP-AES法)测定金质量与... 详细信息

随着金价高涨,黄金成为舆论的焦点。市面上金覆盖层产品推陈出新,市占率增加,其检测需求也逐年增大。本实验对金覆盖层产品样品前处理方法进行改进,极大的简化了前处理流程,利用电感耦合等离子体原子发射光谱法(ICP-AES法)测定金质量与金层厚度,实验结果表明本实验方法测量结果与国家标准结果相一致。本实验方法不仅操作便捷,且结果准确可靠。

关键词：金覆盖层金质量金厚度 ICP-AES

Three-dimensional delineation of soil pollutants at contaminated sites: Progress and prospects

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Journal of Geographical Sciences 2022年第8期32卷 1615-1634页

作者： TAO Huan LIAO xiaoyong cao Hongying ZHAO Dan HOU Yixuan Institute of Geographic Sciences and Natural Resources Research CASBeijing 100101China Chinese Academy of Environmental Planning Beijing 100012China University of Chinese Academy of Sciences Beijing 100049China

The precision remediation and redevelopment of contaminated sites are crucial issues for improving the human settlement and constructing a beautiful China. Three-dimensional delineation of soil pollutants at contaminated sites is a prerequisite for precision remediation and redevelopment. However, a contaminated site is a three-dimensional complex system coupling multiple spatial elements above-and under-ground. The complexity incurs high uncertainties about the three-dimensional delineation of soil pollutants based on sparse borehole and spatial statistics and inference models. This paper first systematically reviewed the objectives of fine three-dimensional delineation of soil pollutants, the sampling strategies for soil boring, the commonly used models for delineating soil pollutants, and the relevant cases of applying these models at contaminated sites. We then summarized the effects of borehole data and three-dimensional models on soil pollutants' delineation results from biased characteristics and nonstationary conditions. The present research status and related issues on correcting the biased characteristics and nonstationary conditions were analyzed. Finally, based on the problems and challenges, we suggested the three-dimensional delineation of soil pollutants in the underground “black box” for future research from the following six priority areas: multi-scenarios, nonstationary, non-linearity, multi-source data fusion, multiple model coupling, and the delineation of co-contaminated sites.

关键词： contaminated sites soil pollution three-dimensional delineation model sparse and biased nonstationarity

Investigation of 3D Dirac semimetal supported terahertz dielectric-loaded plasmonic waveguides

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Communications in Theoretical Physics 2022年第12期74卷 130-137页

作者： Yubo Liang Guangqing Wang Yan Cheng Duo cao Dejun Yang xiaoyong He Fangting Lin Feng Liu Department of Physics Mathematics&Science CollegeShanghai Normal UniversityNo.100 Guilin RoadShanghai 200234China Shanghai Normal University Key Lab Submillimeter AstrophysicsNo.100 Guilin RoadShanghai 200234China

The tunable propagation properties of 3D Dirac semimetal(DSM)-supported dielectric-loaded surface plasmons structures have been investigated in the THz regime,including the influences of the Fermi level of 3D DSM layer,the fiber shape and operation *** results indicate that the shape of dielectric fiber affects the hybrid mode significantly,on the condition that if ax(the semi-minor axis length of the dielectric semi-ellipse)is relatively small,the fiber shows good mode confinement and low loss simultaneously,and the figure of merit reaches more than *** propagation property can be manipulated in a wide range by changing the Fermi level of 3D DSM,*** the Fermi level varies in the range of 0.05 eV–0.15 eV,the propagation length changes in the range of 9.073×10^(3)–2.715×10^(4)μm,and the corresponding modulation depth is 66.5%.These results are very helpful to understand the tunable mechanisms of the 3D DSM plasmonic devices,such as switchers,modulators,and sensors.

关键词： terahertz waves 3D Dirac semimetal surface plasmons tunable

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镀金产品的金质量及含量研究

广东化工 2022年第22期49卷 201-203页

作者：黄靖宇黄杏娇曹小勇杨桂群张学友吴珍珍深圳市宁深检验检测技术有限公司广东深圳518020 南京市产品质量监督检验院国家金银制品质量检验检测中心(南京) 江苏南京210028

目前市场上有很多镀金产品,但是国内对镀金产品检测的报道很少。本文对市面上最常见的四种镀金产品的基体及镀金厚度进行研究。通过对比实验确定了四种基体溶解酸的最佳组合及条件,得到完整的镀金层之后,使用X射线荧光光谱仪、电感耦合... 详细信息

目前市场上有很多镀金产品,但是国内对镀金产品检测的报道很少。本文对市面上最常见的四种镀金产品的基体及镀金厚度进行研究。通过对比实验确定了四种基体溶解酸的最佳组合及条件,得到完整的镀金层之后,使用X射线荧光光谱仪、电感耦合等离子体发射光谱仪(ICP-OES)对镀金层的厚度及金含量进行测定。实验发现对镀层厚度在1μm左右及以上的产品可以准确测定镀金层的含量及质量,镀层小于0.4μm的产品还需进一步研究。本实验方法对市场上大部分的镀金产品都可准确测定,满足了贵金属市场新产品的检测需求。

关键词：镀金溶解酸电感耦合等离子体发射光谱法金质量金含量

Ordered mesoporous NiFe_2O_4 with ultrathin framework for low-ppb toluene sensing

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Science Bulletin 2018年第3期63卷 187-193页

作者： xiaoyong Lai Kun cao Guoxin Shen Ping Xue Dan Wang Fang Hu Jianli Zhang Qingfeng Yang Xiaozhong Wang State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan750021 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China School of Materials Science and Engineering Shenyang University of Technology Shenyang 110870 China

Highly sensitive and selective detection against specific target gases, especially at low-ppb （part per bil- lion） level, remain a great number of challenges in gas sensor applications. In this paper, we first present an ordered mesoporous NiFe204 for highly sensitive and selective detection against low-ppb toluene. A series of mesoporous NiFe204 materials were synthesized by templating from mesoporous silica KIT-6 and its framework thickness was reduced from 8.5 to 5 nm by varying the pore size of KIT-6 from 9.4 to 5.6 nm, accompanied with the increase of the specific surface area from 134 to 216 m^2 g^-1. The ordered mesoporous NiFe2O4 with both ultrathin framework of 5 nm and large specific surface area of up to 216 m^2 g^-1 exhibits a highest response （Rgas/Ralr-1 = 77.3） toward 1,000 ppb toluene at 230℃ and is nearly 7.3 and 76.7 times higher than those for the NiFe204 replica with thick framework and its bulk counter- part respectively, which also possesses a quite low limit of detection （〈2 ppb）, and good selectivity.

关键词： Mesoporous material NiFe2O4 Gas sensing Low-ppb toluene

Informatization Teaching Research Empowers Teachers toward Clustered Innovation and Practice of High-Quality Development

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Frontiers of Education in China 2023年第2期18卷 159-170页

作者： HU xiaoyong ZENG Xiangyi XU Huanyun cao Yuxing SUN Shuo School of Educational Information Technology South China Normal UniversityGuangzhou 510631China Special Education Resources Department National Center for Educational TechnologyBeijing 100031China

Teachers are the primary resource of education and an important guarantee for building a high-quality education *** research is an effective way for teacher professional *** paper focuses on problems of the failure of traditional teaching research models,unbalanced supply,and inaccurate support,with the core goal of realizing the clustered,synergistic,and high-quality development of teachers,and builds a new form model of three integrations,one focus,and N innovations for regional informatization teaching research with innovative characteristics,a dual coordination mechanism for the clustered high-quality development of teachers,and an accurate support strategy for the comprehensive literacy of teacher informatization teaching research.

关键词： information technology teaching research clustered high-quality developrnent synergistic mechanism accurate support

In-situ TEM study on the evolution of dislocation loops and bubbles in CeO_(2)during Kr^(+)single-beam and Kr^(+)-H_(2)^(+)dual-beam synergetic irradiation

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Journal of Materials Science & Technology 2022年第28期123卷 49-59页

作者： Ziqi cao Guang Ran Zhen Wang Yipeng Li xiaoyong Wu Lu Wu Xiuyin Huang Huajun Mo College of Energy Xiamen UniversityXiamen 361102China The First Sub-Institute Nuclear Power Institute of ChinaChengdu 610041China Fujian Provincial Nuclear Energy Engineering Technology Research Center Xiamen 361102China

CeO_(2)is widely used as the nonradioactive surrogate fuel of UO_(2)when studying the irradiation performance of UO_(2).The evolution and characteristics of dislocation loops and bubbles in CeO_(2)foils were studied by in-situ transmission electron microscopy(TEM)observation during 400 ke V Kr^(+)&30 ke V H_(2)^(+)dual-beam synergetic irradiation and 400 ke V Kr^(+)single-beam irradiation at 1073 *** rotation of the habit plane of dislocation loops induced by above ion irradiation was found in the CeO_(2)for the first time,such as from[211]to[311]and then to[100].The rafted loops were first observed under Kr^(+)&H_(2)^(+)dual-beam synergetic irradiation,which not only had similar[111]direction,but also belonged to perfect dislocation loops(PDLs).The rafted loops were formed not only by the growth of loops that absorbed irradiation defects,but also by the combination of ***,this phenomenon of loop rafting was not obvious during Kr single-beam *** was first found that Kr^(+)irradiation induced the change of Burgers vectors of *** absorption of large PDLs to small PDLs was also *** average size and areal number density of dislocation loops and gas bubbles as a function of irradiation dose were constructed,which showed that the addition of H_(2)^(+)obviously affected the characteristics of dislocation loops and gas bubbles and the swelling of CeO_(2).

关键词： Nuclear Fuel Cerium dioxide In-situ TEM Irradiation Dislocation Bubbles