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Melt flow,heat transfer and solidification in a flexible thin slab continuous casting mold with vertical-combined electromagnetic braking

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Journal of Iron and Steel Research(International) 2024年第2期31卷 401-415页

作者： Lin Xu ze-feng Han Christian Karcher en-gang Wang Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang110819LiaoningChina Key Laboratory of Liaoning Province for Clean Combustion Power Generation and Heating Technology Shenyang Institute of EngineeringShenyang110136LiaoningChina Institute of Thermodynamics and Fluid Mechanics Technische Universität IlmenauIlmenau98684Germany

During continuous casting of steel slabs,the application of electromagnetic braking technology(EMBr)provides an effective tool to influence solidification by controlling the pattern of melt flow in the ***,the quality of the final product can be improved considerably.A new electromagnetic braking(EMBr)method,named vertical-combined electromagnetic braking(VC-EMBr),is proposed to be applied to a flexible thin slab casting(FTSC)*** evaluate the beneficial effects of the VC-EMBr,the melt flow,heat transfer,and solidification processes in the FTSC mold are studied by means of numerical *** detail,a Reynolds-averaged Navier–Stokes turbulence model together with an enthalpy-porosity approach was *** numerical findings are compared with respective simulations using the traditional *** results demonstrate that the application of the VC-EMBr contributes significantly to preventing relative slab *** contrast to the Ruler-EMBr,the additional vertical magnetic poles of the VC-EMBr preferentially suppress the direct impact of jet flow on the narrow face of FSTC mold and considerably diminish the level fluctuation near the meniscus *** instance,by applying a magnetic flux density of 0.3 T,the maximum amplitude of meniscus deflection reduces by about 80%.Moreover,the braking effect of the VC-EMBr effectively improves the homogeneity of temperature distribution in the upper recirculation region and increases the solidified shell thickness along the casting *** this basis,the newly proposed VC-EMBr shows a beneficial effect in preventing relative slab defects for FTSC thin slab continuous casting.

关键词： Electromagnetic braking Mold Melt flow Heat transfer Solidification

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entanglement quantification via weak measurements assisted by deep learning

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Photonics Research 2024年第4期12卷 712-719页

作者： MU YANG YA XIAO ze-YAN HAO YU-WEI LIAO JIA-HE CAO KAI SUN en-HUI WANG ZHenG-HAO LIU YUTAKA SHIKANO jin-SHI XU CHUAN-FenG LI GUANG-CAN GUO CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China College of Physics and Optoelectronic engineering Ocean University of ChinaQingdao 266100China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Electric Power Research Institute State Grid Anhui Electric Power Co.Ltd.Hefei 230601China Institute of Systems and Information engineering University of TsukubaIbaraki 305-8573Japan Center for Artificial Intelligence Research University of TsukubaIbaraki 305-8577Japan Graduate School of Science and Technology Gunma UniversityGunma 371-8510Japan Institute for Quantum Studies Chapman UniversityOrangeCalifornia 92866USA JST PRESTO Saitama 332-0012Japan

entanglement has been recognized as being crucial when implementing various quantum information ***, quantifying entanglement for an unknown quantum state requires nonphysical operations or post-processing measurement data. For example, evaluation methods via quantum state tomography require vast amounts of measurement data and likely estimation.

关键词： estimation quantum angle

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Three-dimensional visualization technology for guiding one-step percutaneous transhepatic cholangioscopic lithotripsy for the treatment of complex hepatolithiasis

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World Journal of Gastroenterology 2024年第28期30卷 3393-3402页

作者： Yong-Qing Ye Ya-Wen Cao Rong-Qi Li en-ze Li Lei Yan Zhao-Wei Ding jin-Ming Fan Ping Wang Yi-Xiang Wu Department of Hepatobiliary Surgery The Second People’s Hospital of FoshanFoshan 528000Guangdong ProvinceChina Department of Emergency Medicine Biomedical Innovation CenterThe Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhou 510655Guangdong ProvinceChina Department of Hepatobiliary Surgery Foshan Hospital of Traditional Chinese MedicineFoshan 528000Guangdong ProvinceChina Department of Hepatobiliary Surgery The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510282Guangdong ProvinceChina Department of Gastrointestinal Surgery The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510120Guangdong ProvinceChina

BACKGROUND Biliary stone disease is a highly prevalent condition and a leading cause of hospitalization *** with associated strictures has high residual and recurrence rates after traditional multisession percutaneous transhepatic cholangioscopic lithotripsy(PTCSL).AIM To study one-step PTCSL using the percutaneous transhepatic one-step biliary fistulation(PTOBF)technique guided by three-dimensional(3D)*** This was a retrospective,single-center study analyzing,140 patients who,between October 2016 and October 2023,underwent one-step PTCSL for *** patients were divided into two groups:The 3D-PTOBF group and the PTOBF *** clearance on choledochoscopy,complications,and long-term clearance and recurrence rates were *** Age,total bilirubin,direct bilirubin,Child-Pugh class,and stone location were similar between the 2 groups,but there was a significant difference in bile duct strictures,with biliary strictures more common in the 3D-PTOBF group(P=0.001).The median follow-up time was 55.0(55.0,512.0)*** immediate stone clearance ratio(88.6%vs 27.1%,P=0.000)and stricture resolution ratio(97.1%vs 78.6%,P=0.001)in the 3D-PTOBF group were significantly greater than those in the PTOBF *** complication(8.6%vs 41.4%,P=0.000)and stone recurrence rates(7.1%vs 38.6%,P=0.000)were significantly lower in the 3D-PTOBF *** Three-dimensional visualization helps make one-step PTCSL a safe,effective,and promising treatment for patients with complicated primary *** perioperative and long-term outcomes are satisfactory for patients with complicated primary *** minimally invasive method has the potential to be used as a substitute for hepatobiliary surgery.

关键词： Hepatolithiasis One-step percutaneous transhepatic cholangioscopic lithotripsy Biliary disease Three-dimensional visualization Clinical efficacy

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短管直径对短管蜂窝夹套传热性能的影响

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石油化工设备 2024年第3期53卷 58-64页

作者：沈航宇董金善胡恩泽南京工业大学机械与动力工程学院江苏南京211816

基于某工程中1台干燥机的短管蜂窝夹套结构形式,通过将短管尺寸由Ф90 mm×5 mm逐渐增大到Ф135 mm×7.5 mm,建立了模型1~模型6共6种夹套流场计算有限元模型,模拟分析了各模型速度场和温度场分布特性,计算并对比了各模型在不同体积流量... 详细信息

基于某工程中1台干燥机的短管蜂窝夹套结构形式,通过将短管尺寸由Ф90 mm×5 mm逐渐增大到Ф135 mm×7.5 mm,建立了模型1~模型6共6种夹套流场计算有限元模型,模拟分析了各模型速度场和温度场分布特性,计算并对比了各模型在不同体积流量下的总传热系数。模拟数据表明,随着短管尺寸的增大,夹套流体域内最大流速呈持续递减趋势。随着短管尺寸的增大,夹套流体域内温度场均匀性先升后降,模型5温度场分布均匀性最佳,总传热系数最大。随着体积流量的增加,夹套总传热系数持续增大。随着短管直径的增大,夹套总传热系数先升后降,模型5总传热系数最大。综合分析表明,在一定范围内增大短管的直径,能够强化夹套传热效果。

关键词：干燥机蜂窝夹套短管直径流场传热优化

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多特征融合和孪生注意力网络的高分辨率遥感图像目标检测

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吉林大学学报（工学版） 2024年第1期54卷 240-250页

作者：王春华李恩泽肖敏黄淮学院动画学院河南驻马店463000 武汉理工大学计算机与人工智能学院武汉430063

为提高高分辨率遥感图像目标检测效果,本文将多特征融合方法和孪生注意力网络相结合,提出一种新的目标检测方法。构建遥感图像目标检测的整体框架,基于锚框模型对遥感图像目标进行多层特征的提取及融合;运用孪生注意力网络对遥感图像目... 详细信息

为提高高分辨率遥感图像目标检测效果,本文将多特征融合方法和孪生注意力网络相结合,提出一种新的目标检测方法。构建遥感图像目标检测的整体框架,基于锚框模型对遥感图像目标进行多层特征的提取及融合;运用孪生注意力网络对遥感图像目标实时视觉跟踪检测,引入通道和空间的双重自注意力机制,提高目标图像的特征表达能力,由此得到更加精准的检测结果。实验分析结果表明,本文方法的平均总体精度为93.8,F1指数平均值为0.88,Kappa系数平均值为0.93,均明显高于对比方法,说明本文方法具有较好的检测效果。

关键词：多特征融合高分辨率遥感图像孪生注意力目标检测语义特征

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Calculation of the energy dependence of fission fragments yields and kinetic energy distributions for neutron-induced ^(235)U fission

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Chinese Physics C 2024年第8期48卷 159-169页

作者： Ya-Ning Han Zheng Wei Yi-Xuan Wang Dong-Ying Huo Peng-Qi Zhang Ming Li Jun Ma Kang Wu Yong-Guang Zheng Yuan He Zhi-Yong Deng Tian-Zhi Jiang Xiang-Lin Zhuo jin Li Yun Zhang Yu Zhang Jun-Run Wang Xiao-Dong Su ze-en Yao School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China engineering Research Center for Neutron Application Technology Ministry of EducationLanzhou UniversityLanzhou 730000China MOE Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000China Nuclear Power Institute of China Chengdu 610000China

Fission fragments yields and average total kinetic energy are fundamental nuclear data for nuclear energy applications and the study of nuclear *** fission products,such as ^(95)Zr,^(99)Mo,^(140)Ba,^(144)Ce,and ^(147)Nd,serve as burnup monitors,assessing the number of fissions induced by neutrons on ^(235)***,current experimental data for these fission products worldwide are inconsistent,introducing significant uncertainty into related scientific *** this study,we employed the Potential-driving Model to calculate the independent yields of ^(235)U and evaluate its advantages in such ***,we investigated the energy dependence of independent yields to select important ***,we calculated the cumulative yields of ^(95)Zr,^(99)Mo,^(140)Ba,^(144)Ce,and ^(147)Nd,and compared them with existing literature data to explore the energy dependence of fission products for ^(235)*** the lack of fission product yield data above 14.8 MeV,we extended our calculated incident neutron energy to 20 MeV,aiming to support future scientific *** Geant4 physical model does not consider the influence of incident neutron energy on the average total kinetic energy of fission fragments;thus,we introduced the excitation function of the total kinetic energy of fission fragments recommended by Madland et al.,which effectively describes the experimental data of the average total kinetic energy of fragments formed in ^(235)U *** this paper,we comprehensively discuss the energy dependence of fission product yields and average total kinetic energy.

关键词： ^(235)U(n f) potential-driving model fission yields kinetic energies energy dependence

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中国中学生睡眠质量变迁的横断历史元分析

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中国临床心理学杂志 2024年第1期32卷 187-192页

作者：周恩泽刘文高超辽宁师范大学心理学院大连116029

目的:探讨2000至2020年间我国中学生睡眠质量的变化趋势。方法:检索中国知网、万方等数据库,选取以匹茨堡睡眠质量指数(PSQI)测量中学生睡眠质量的文献,采用横断历史元分析方法探究中学生睡眠质量的变迁趋势及其影响因素,采用一般元分... 详细信息

目的:探讨2000至2020年间我国中学生睡眠质量的变化趋势。方法:检索中国知网、万方等数据库,选取以匹茨堡睡眠质量指数(PSQI)测量中学生睡眠质量的文献,采用横断历史元分析方法探究中学生睡眠质量的变迁趋势及其影响因素,采用一般元分析方法考察中学生睡眠质量的性别差异。结果:共纳入92篇文献。我国中学生PSQI总分与年代呈显著正相关,初中生和高中生的PSQI总分都与年代显著正相关。经济发展、教育状况和家庭发展能显著预测中学生睡眠质量的下降。结论:21世纪以来我国中学生的睡眠质量呈现整体下降的趋势。

关键词：中学生睡眠质量横断历史元分析

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非缺血性心肌病的研究进展及治疗现状

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中国临床研究 2024年第6期37卷 835-838,871页

作者：刘泽恩郭建强内蒙古医科大学附属医院心血管内科内蒙古呼和浩特010000

临床上把心脏扩大、心律失常和心力衰竭三者单独或同时存在为特征的心脏疾病称为心肌病。通常由冠状动脉粥样硬化病变引起的为缺血性心肌病,非缺血性心肌病与之不同,是指由非冠状动脉粥样硬化病变所致,可引起心力衰竭、心律失常、甚至... 详细信息

临床上把心脏扩大、心律失常和心力衰竭三者单独或同时存在为特征的心脏疾病称为心肌病。通常由冠状动脉粥样硬化病变引起的为缺血性心肌病,非缺血性心肌病与之不同,是指由非冠状动脉粥样硬化病变所致,可引起心力衰竭、心律失常、甚至猝死。但对其病因、诊断、治疗方法仍不甚明确,疗效有待进一步探索。本文分析了缺血性心肌病病因学、诊断方面,及当前药物及非药物治疗现状,为此类患者的早期预防提供更多参考资料,为临床上患者的诊断及治疗提供方向。

关键词：非缺血性心肌病扩张型心肌病肥厚型心肌病限制性心肌病心脏再同步化治疗骨髓干细胞移植射频消融术

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中部地区出口贸易、产业专业化的耦合协同与绿色增长

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生态经济 2024年第3期40卷 54-63,74页

作者：龚恩泽张建清武汉大学中国中部发展研究院湖北武汉430072 武汉大学经济与管理学院湖北武汉430072

论文从出口贸易、产业专业化耦合协同的视角探讨了中部城市绿色增长态势的形成机制,使用中部地区2006—2019年的地级市数据测度并分析了二者耦合协同度的时空演化态势,实证检验了其对区域绿色增长的影响效应和影响机制,研究发现:(1)中... 详细信息

论文从出口贸易、产业专业化耦合协同的视角探讨了中部城市绿色增长态势的形成机制,使用中部地区2006—2019年的地级市数据测度并分析了二者耦合协同度的时空演化态势,实证检验了其对区域绿色增长的影响效应和影响机制,研究发现:(1)中部地区出口贸易、产业专业化尚处于耦合协同的初级阶段,整体呈先增后降的态势,二者耦合协同在中部地区未显现出明显的空间聚类。(2)中部地区出口贸易、产业专业化的耦合协同不利于区域绿色增长。(3)中部地区出口贸易、产业专业化耦合协同拉大了一般地级市和省会城市的发展差距,刺激了政府增加财政支出力度间接不利于城市绿色增长,通过降低城市技术创新强度一定程度上间接抵消了对绿色增长的不利影响。(4)中部地区出口贸易、产业专业化耦合协同对绿色增长的影响因城市空间区位、城市特征差异显现出异质性。基于此提出了政策建议。

关键词：出口贸易产业专业化耦合协同绿色增长中部地区

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Characterization of a pangolin SARS-CoV-2-related virus isolate that uses the human ACE2 receptor

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Science China(Life Sciences) 2024年第7期67卷 1502-1513页

作者： Luo-Yuan Xia Xue-Feng Wang Xiao-Ming Cui Yi-Ming Zhang Zhen-Fei Wang en-Tao Li Chang-Fa Fan Ke Song Yuan-Guo Li Run-ze Ye Fang-Xu Li Dai-Yun Zhu Jie Zhang Zhuang-Zhuang Shi Ming-Zhu Zhang Liang-jing Li Shi-jing Shen Song jin Ya-Wei Zhang Wei-Guang Fu Lin Zhao Wen-Hao Wang Tie-Cheng Wang You-Chun Wang Jia-Fu Jiang Yan-Ling Hu Na Jia Yu-Wei Gao Wu-Chun Cao Institute of EcoHealth School of Public HealthCheeloo College of MedicineShandong UniversityJinan 250012China Changchun Veterinary Research Institute Changchun 130122China State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijing 100071China Division of Animal Model Research Institute for Laboratory Animal ResourcesNational Institutes for Food and Drug ControlBeijing 102629China National Institutes for Food and Drug Control Beijing 102629China Life Sciences Institute Guangxi Medical UniversityNanning 530020China College of Life Sciences Shandong Normal UniversityJinan 250014China Research Unit of Discovery and Tracing of Natural Focus Diseases Chinese Academy of Medical SciencesBeijing 100071China

Various SARS-CoV-2-related coronaviruses have been increasingly identified in pangolins,showing a potential threat to *** we report the infectivity and pathogenicity of the SARS-CoV-2-related virus,PCoV-GX/P2V,which was isolated from a Malayan pangolin(Manis javanica).PCoV-GX/P2V could grow in human hepatoma,colorectal adenocarcinoma cells,and human primary nasal epithelial *** replicated more efficiently in cells expressing human angiotensin-converting enzyme 2(hACE2)as SARS-CoV-2 *** intranasal inoculation to the hACE2-transgenic mice,PCoV-GX/P2V not only replicated in nasal turbinate and lungs,but also caused interstitial pneumonia,characterized by infiltration of mixed inflammatory cells and multifocal alveolar *** population immunity established by SARS-CoV-2 infection and vaccination may not protect people from PCoV-GX/P2V *** findings further verify the hACE2 utility of PCoV-GX/P2V by in vivo experiments using authentic viruses and highlight the importance for intensive surveillance to prevent possible cross-species transmission.

关键词： pangolin SARS-CoV-2-related virus infectivity pathogenicity human cell lines human ACE2 receptor hACE2-transgenic mice

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