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Machine Learning-Based Research on Tensile Strength of SiC-Reinforced Magnesium Matrix Composites via Stir Casting

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 453-466页

作者： Zhihong Zhu Wenhang Ning Xuanyang Niu Yuhong Zhao Beijing Advanced Innovation center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan 030051China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China

SiC is the most common reinforcement in magnesium matrix composites,and the tensile strength of SiC-reinforced magnesium matrix composites is closely related to the distribution of *** a uniform distribution of SiC requires fine control over the parameters of SiC and the processing and preparation ***,due to the numerous adjustable parameters,using traditional experimental methods requires a considerable amount of experimentation to obtain a uniformly distributed composite ***,this study adopts a machine learning approach to explore the tensile strength of SiC-reinforced magnesium matrix composites in the mechanical stirring casting *** analyzing the influence of SiC parameters and processing parameters on composite material performance,we have established an effective predictive ***,six different machine learning regression models have been developed to predict the tensile strength of SiC-reinforced magnesium matrix *** validation and comparison,our models demonstrate good accuracy and reliability in predicting the tensile strength of the composite *** research findings indicate that hot extrusion treatment,SiC content,and stirring time have a significant impact on the tensile strength.

关键词： Machine learning Stirring casting Magnesium matrix composite Tensile strength

Association of Thallium Exposure with Decreased Renal Function among Chinese Adults—China,2017-2018

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China CDC weekly 2024年第34期6卷 867-871,I0007-I0010页

作者： Zheng Zhang Miao Zhang Yingli Qu Feng Zhao Saisai Ji Zheng Li Bing Wu Chunxian Lyu Haocan Song Qi Sun Yawei Li Xu Zhang Xulin Zheng Yidan Qiu Zihan Lu Hui Fu Lanjing Xu Wenli Zhang Yufei Luo Fangyu Li Jiayi Cai Yuanduo Zhu Ying Zhu Zhaojin Cao Yuebin Lyu Xiaoming Shi China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijingChina center for Global Health School of Public HealthNanjing Medical UniversityNanjing CityJiangsu ProvinceChina Department of Big Data in Health Science School of Public HealthZhejiang UniversityHangzhou CityZhejiang ProvinceChina Department of Occupational Health and Environment Health School of Public HealthAnhui Medical UniversityHefei CityAnhui ProvinceChina School of Public Health China Medical UniversityShenyang CityLiaoning ProvinceChina National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases(NITFID) National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijingChina

Summary What is already known about this topic?Thallium(Tl)is significantly more toxic than heavy metals such as lead,cadmium,and ***,previous studies examining the relationship between Tl exposure and the risk of chr... 详细信息

关键词： Renal kidney mercury

Influence of Boundary Layer Mixing Mechanisms on the Simulation of Typhoon Wutip:A Direct Hit on the Xisha Islands in 2013

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Journal of Tropical Meteorology 2024年第3期30卷 211-222页

作者： GUO Tian-yun LI Jiang-nan PANG Si-min MA Xiao-ling School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster StudiesSun Yat-sen UniversityZhuhaiGuangdong 519082 China Hunan meteorological service center Changsha 410118 China Guangxi meteorological Disaster Prevention center Nanning 530022 China Hunan Key Laboratory of meteorological Disaster Prevention and Mitigation Changsha 410118 China

In this study,we simulated the tropical cyclone(TC)Wutip,which originated in the South China Sea in 2013,using three planetary boundary layer(PBL)parameterized schemes within the Weather Research and Forecasting model,i.e.,Medium-Range Forecast(MRF),Yonsei University scheme(YSU),and Asymmetric Convective Model Version 2(ACM2),with different vertical mixing *** investigated the effects of different PBL mixing mechanisms on the simulation of TC track,intensity,structure,and *** results reveal that the surface flux and vertical mixing of PBL jointly influenced the TC throughout its lifecycle,and the simulated TC intensity was closely correlated with the eyewall *** three schemes were all first-order and nonlocal closure ***,the MRF scheme was over-mixed,which led to a relatively dryer and warmer near-surface layer,a wetter and colder upper PBL,and thus a simulated eyewall with the smallest wet static energy and weaker ***,the MRF scheme produced the smallest 10-m wind speed,which was closest to the observation,and the weakest TC warm-core structure and *** YSU scheme was similar to the MRF scheme,yet it distinguished itself by incorporating an explicit treatment of the entrainment process at the top of the PBL and developing thermal-free convection above the PBL of the eyewall,which significantly increased the wet static energy over the TC ***,the simulated eyewall was more contracted and steeper with stronger upward motion while the eye area became even warmer,finally leading to the strongest *** precipitation distribution simulated by the YSU scheme was the most consistent with the *** ACM2 scheme used the nonlocal upward and local downward mixed asymmetric convection modes,which reduced the excessive de-velopment of thermal-free convection at the eyewall,and avoided restricting the dynamically forced turbulent motion outside the eyewall,leading to a larger radius of the

关键词： tropical cyclone PBL scheme mixing mechanism WRF

Microstructure and texture evolution of Cu–Cr–Co–Ti alloys during the two-stage cryorolling

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Rare Metals 2024年第9期43卷 4535-4547页

作者： Jia-Jun Zhang Long-Jian Li Zhi-Feng Liu Zong-Ning Chen En-Yu Guo Hui-Jun Kang Ren-Geng Li Tong-Min Wang Key Laboratory of Solidification Control and Digital Preparation Technology (liaoning province) School of Materials Science and EngineeringDalian University of Technology center of Hyper-Gravity Experimental and Interdisciplinary Research Zhejiang University Ningbo Institute of Dalian University of Technology！Ningbo315000 China Key Laboratory for Light-Weight Materials Nanjing Tech University

This study entailed an investigation of the mechanical properties, microstructural and texture orientation evolutions of CuDCrDCoDTi alloys prepared via twostage cryorolling and intermediate aging treatment. To this end, X-ray diffraction and electron backscatter diffraction were employed. The results indicate that the two-stage cryorolling and intermediate aging treatments led to the development of profuse twin bundles and significantly enhanced the mechanical properties. The initial cryorolling led to coplanar slip and developed a strong Y({111} ) orientation, accelerating the formation of Goss({011} ) orientation and a Brass-type *** intermediate aging treatment relieved the restriction on dislocation slip and reoriented the grains toward the Copper({112} ) and Z({111} ) *** Z orientation, with a relatively high volume fraction,dominated the macrotexture. Secondary cryorolling intensified twinning and shear banding, transforming the Copper-type shear bands into Brass-type shear bands with rhomboidal prism morphology. The areas inside the Brasstype shear bands exhibited a Y orientation, and the areas outside the shear bands exhibited a stable Brass-type texture. The evident decrease in the weighted Schmid factors demonstrated that the two-stage cryorolling and intermediate aging treatment can modify the texture evolution and aid the design of high-performance Cu alloys.

关键词： Copper alloys Electron backscatter diffraction Macrotexture evolution Schmid factor Two-stage cryorolling

Influence of preheating treatments on cyanide content， nutritional composition， physicochemical properties， color and oxidative stability of flaxseed meal

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中国油脂 2024年

作者： ZHOU Junzhuo CHU Pengfei DONG Guimei PEI Xuechen HUANG Jiaqian ZHENG Rui YIN Fawen ZHOU Dayong SKL of Marine Food Processing & Safety Control， National Engineering Research center of Seafood， Collaborative Innovation center of Seafood Deep Processing， liaoning province Key Laboratory for Marine Food Science and Technology， School of Food Science and Technology， Dalian Polytechnic University

This study aimed to investigate the effects of different preheating treatments （steaming， roasting and microwave） of flaxseed on cyanide content， nutritional composition， physicochemical properties， color and oxidative stability of flaxseed meal. The three preheating methods of flaxseed all significantly decreased the hydrocyanic acid （HCN） contents. By contrast， microwave was the most effective detoxification method. After 5 min of microwave treatment， the HCN content in flaxseed was reduced from 94.65 ± 1.68 mg/kg to 7.80 ± 0.57 mg/kg. In addition， the three preheating methods all significantly increased the polyphenol content， thiobarbituric acid reactive substances （TBARS）， peroxide value （POV）， and a*value， and slightly decreased polyunsaturated fatty acid （PUFA） contents， but significantly decreased total amino acid contents as well as L*， W*and b*values. Interestingly， the three preheating methods all improved the oxidative stability and color stability of flaxseed upon accelerated storage under 40 °C. Compared with steaming （120 ℃ for 20 min） and roasting （100 ℃ for 40 min）， microwave （560 W for 4 min） is recommended for decreasing cyanide content， as well as enhancing the flaxseed' stability and qualitative attributes.

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Prevalence of Reproductive Tract Infections and Association with Human Papillomavirus Infection Among Reproductive-Age Women—Six Tertiary Hospitals,China,June 2021-December 2022

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China CDC weekly 2024年第10期6卷 189-194,I0002页

作者： Di Gao Jiayue Li Gengli Zhao Zhaohui Liu Hui Bi Dai Zhang Fengxia Xue Chen Liu Hongtao Ma Bei Lin Xu Wang Xiaosong Zhang Linhong Wang Department of Obstetrics and Gynecology Peking University First HospitalBeijingChina School of Medicine University College DublinIreland Beijing Obstetrics and Gynecology Hospital BeijingChina Tianjin Medical University General Hospital TianjinChina Northwest Women’s and Children’s Hospital Xi’an CityShaanxi ProvinceChina Third Affiliated Hospital of Zhengzhou University Zhengzhou CityHenan ProvinceChina Shengjing Hospital of China Medical University Shenyang CityLiaoning ProvinceChina National center for Chronic and Non-Communicable Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina

Summary What is already known about this topic?Previous studies have indicated a possible association between reproductive tract infections(RTIs)and highrisk human papillomavirus(HPV)infection,but the evidence is still *** is added by this report?This multicenter study found significantly higher positive rates of HPV,including general HPV,highrisk HPV.

关键词： Tertiary infection Reproductive

Customization of FeNi alloy nanosheet arrays inserted with biomass-derived carbon templates for boosted electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 812-824页

作者： Xuanqi Yang Honghan Wang Jing Chen Qingda An Zuoyi Xiao Jingai Hao Shangru Zhai Junye Sheng liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China Qingdao Medical College Qingdao UniversityQingdao 266071China

Electromagnetic wave(EMW)-absorbing materials have considerable capacity in the military field and the prevention of EMW radiation from harming human ***,obtaining lightweight,high-performance,and broadband EMW-absorbing material remains an overwhelming *** dielectric/magnetic composites with customized structures is a strategy with great promise for the development of high-performance EMW-absorbing *** layered double hydroxides as the precursors of bimetallic alloys and combining them with porous biomass-derived carbon materials is a potential way for constructing multi-interface heterostructures as efficient EMW-absorbing materials because they have synergistic losses,low costs,abundant resources,and light ***,FeNi alloy nanosheet array/Lycopodium spore-derived carbon(FeNi/LSC)was prepared through a simple hydrothermal and carbonization ***/LSC presents ideal EMW-absorbing performance by benefiting from the FeNi alloy nanosheet array,sponge-like structure,capability for impedance matching,and improved dielectric/magnetic *** expected,FeNi/LSC exhibited the minimum reflection loss of-58.3 dB at 1.5 mm with 20wt%filler content and a widely effective absorption bandwidth of 4.92 ***/LSC composites with effective EMW-absorbing performance provide new insights into the customization of biomass-derived composites as high-performance and lightweight broadband EMW-absorbing materials.

关键词： spore-derived carbon FeNi alloy nanosheet array multi-interface heterostructures synergistic effect efficient electromagnet-ic wave absorption

Epidemiological Characteristics of Human Parainfluenza Viruses Infections-China,2019-2023

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China CDC weekly 2024年第12期6卷 235-241,I0003,I0004页

作者： Yixuan Gao Yingwei Ma Daxing Feng Feng Zhang Biao Wang Xiaoqing Liu Bing Zhu Hui Xie Linqing Zhao Xiaoru Long Ying Chen Bing Wang Jie Jiang Zhen Zhu Yan Zhang Aili Cui Baicheng Xia Naiying Mao National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina Precision Medicine Research center Children’s Hospital of ChangchunChangchun CityJilin ProvinceChina Henan Provincial center for Disease Control and Prevention Zhengzhou CityHenan ProvinceChina Laboratory of Viral Diseases Qingdao Municipal Centre for Disease Control and PreventionQingdao CityShandong ProvinceChina Virus Laboratory Gansu Provincial Center for Disease Control and PreventionLanzhou CityGansu ProvinceChina Jiangxi Provincial center for Disease Control and Prevention Nanchang CityGansu ProvinceChina Virus Laboratory Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhou CityGuangdong ProvinceChina Institute for Immunization and Prevention Beijing Center for Disease Prevention and ControlAcademy for Preventive MedicineInstitute of Tuberculosis Control Research and PreventionBeijingChina Laboratory of Virology Beijing Key Laboratory of Etiology of Viral Diseases in ChildrenCapital Institute of PediatricsBeijingChina Department of Infection Children’s Hospital of Chongqing Medical UniversityChongqingChina Inner Mongolia Autonomous Region Comprehensive center for Disease Control and Prevention Hohhot CityInner Mongolia Autonomous RegionChina Shenyang Prefecture center for Disease Control and Prevention Shenyang CityLiaoning ProvinceChina

Introduction:A retrospective study based on sentinel surveillance was conducted in 10 provinciallevel administrative divisions(PLADs)in China to enhance the understanding of the epidemiological characteristics of human parainfluenza viruses(HPIVs).Methods:From January 2019 to June 2023,respiratory specimens were collected from individuals with acute respiratory infections(ARIs)and screened for four HPIVs serotypes and other common respiratory viruses using multiplex real-time polymerase chain reaction(PCR).This study analyzed the association of HPIVs infections with seasonal patterns,geographical distribution,demographic profiles,clinical features,and co-infection ***:During the study period,a total of 12,866 ARIs were *** overall detection rate of HPIVs was 6.15%,varying from 5.04%in 2022 to 9.70%in *** median age of HPIVs-infected patients was 3 ***2 was more prevalent among individuals aged 5–17 years(42.57%),while HPIV4 was more common in those over 65 years(12.24%).HPIV3(54.16%)and HPIV1(27.18%)were the predominant serotypes,and their prevalence exhibited significant seasonal fluctuations postcoronavirus disease 2019(COVID-19)*** peak of HPIV3 shifted three months later in 2020 compared to 2019 and returned to a summer peak *** peaks of HPIV1 were observed in 2021 following the peak of ***,coinfections were frequent in HPIVs cases(overall rate:22.12%),with human rhinovirus being the most common co-infecting ***:The prevalence of HPIVs in China was predominantly due to HPIV3 and HPIV1,and their seasonal patterns were altered by pandemic ***,continuous surveillance of HPIVs is essential.

关键词： prevalence seasonal Human

Overview of ectopic pancreas

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World Journal of Gastrointestinal Surgery 2024年第2期16卷 284-288页

作者： Chang-Fei Li Qiu-Ru Li Miao Bai Yuan-Shi Lv Yan Jiao Patient service center The Second Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Neurology The Second Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Fundus Disease The Second Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina Department of Thyroid Head and Neck Surgery Jilin Cancer HospitalChangchun 130000Jilin ProvinceChina Department of Hepatobiliary and Pancreatic Surgery General Surgery CenterThe First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina

This editorial discusses the article written by Zheng et al that was published in the latest edition of the World Journal of Gastrointestinal *** primary focus is on the causes,location,diagnosis,histological classification,and therapy of ectopic *** pancreas refers to the presence of pancreatic tissue that is situated in a location outside its usual anatomical placement,and is not connected to the normal pancreas in terms of blood supply or anatomical ***,the embryological origin of ectopic pancreas remains *** most prevalent form of ectopic pancreatic is gastric ectopic *** ultrasonography examination can visualize the morphological charac-teristics of the ectopic pancreatic lesion and pinpoint its anatomical *** histological categorization of ectopic pancreas *** treatment has been widely advocated in ectopic pancreas.

关键词： Pancreas Gastric ectopic pancreas Diagnosis Treatment Anatomy