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Effect of surface layer softening from previous electrochemical corrosion on electrochemical cold drawing of Q235 steel bar

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Journal of Iron and Steel Research(International) 2022年第5期29卷 819-835页

作者： J.l.Guo t.J.Chen State Key laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou730050GansuChina

the effects of H_(2)SO_(4)concentration and current in electrochemical corrosion on surface layer softening or plasticizing of Q235 steel bar and their effects on subsequent electrochemical cold drawing(ECD)were *** results indicate that the electrochemical corrosion can soften or plasticize the surface layer of Q235 steel bar and then make the subsequent ECD be conducted more *** softening degree and thickness of the surface layer are continuously enhanced with increasing corrosion rate,i.e.,increasing H_(2)SO_(4)concentration or current,due to the generation of more vacancy clusters in deeper regions of surface *** vacancy clusters then relax dislocations through being absorbed during ECD,and the formation and movement of additional dislocation flux are thereby enhanced,resulting in the further obvious decrease in the drawing *** is also due to the enhanced formation and movement of additional dislocation flux that the dislocation density and thus the hardness of the surface layer are decreased,as well as that the texture structure is *** behaviors are enhanced as the corrosion rate increases.

关键词： Electrochemical corrosion Electrochemical cold drawing Surface layer softening Vacancy Additional dislocation flux

Prompt neutron emission in ^(250)No spontaneous fission associated with ground and isomeric state decays

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Chinese Physics C 2024年第6期48卷 112-117页

作者： R.S.Mukhin A.V.Isaev A.V.Andreev M.l.Chelnokov V.I.Chepigin H.M.Devaraja I.N.Izosimov A.A.Kuznetsova O.N.Malyshev A.G.Popeko Yu.A.Popov A.Rahmatinejad B.Sailaubekov t.M.Shneidman E.A.Sokol A.I.Svirikhin M.S.tezekbayeva M.A.Bychkov A.V.Yeremin O.Dorvaux B.Gall K.Kessaci K.Hauschild A.lopez-Martens Joint Institute for Nuclear Research Dubna141980Russia Dubna State University Dubna141982Russia Institute of Nuclear Physics Almaty050032Kazakhstan l.N.Gumilyov Eurasian National University Astana010008Kazakhstan Kazan Federal University Kazan420008Russia Universitéde Strasbourg CNRSStrasbourg67000France IJClab IN2P3-CNRSUniversitéParis-SaclayOrsay91400France

the complete-fusion reaction^(204)Pb(^(48)Ca,2n)^(250)No was used to study two activities of^(250)No with distinct half-lives.A total of 1357 events were observed in the SFiNx neutron detection *** average number of neutrons emitted per spontaneous fission of^(250)No was determined to be(4.1±0.1).the unusually symmetrical shape of the prompt neutron multiplicity distribution was restored and presented for the first *** tests were performed to compare the prompt neutron multiplicity distributions associated with the ground state and K-isomer state decays.

关键词： spontaneous fission prompt neutrons actinide

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伊尔加兹山脉冰缘地貌发育和土壤形成及其气候的影响(土耳其黑海西岸)

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Journal of Geographical Sciences 2024年第3期34卷 543-570页

作者： DEDE Volkan DENGIZ Orhan DEMIRAG tURAN inci tüRKES Murat SENOl Hüseyin SERIN Soner Department of Geography Ardahan UniversityArdahan75002Türkiye Department of Soil Science and Plant Nutrition Faculty of AgricultureOndokuz Mayıs UniversitySamsun55139Türkiye Department of Geography Faculty of Human and Social SciencesSamsun UniversitySamsun55080Türkiye Center for Climate Change and Policy Studies Boğaziçi Universityİstanbul34342Türkiye Faculty of Agriculture Department of Soil Science and Plant NutritionIsparta University of Applied SciencesIsparta32200Türkiye Institute of Social Sciences İstanbul Universityİstanbul34119Türkiye

the main aims of the current study are to determine the morphological features of the periglacial landforms(non-sorted step,mud circle,stony earth circle,thufur,and congeliturbation)located on the Ilgaz Mountains,examine the physicochemical and mineralogical properties with pedological processes of the soils,and assess of the effects of climatic conditions controlling the development of *** Ilgaz Mountains(2587 m a.s.l.),located in the Western Black Sea Region,within the Anatolian Mountains,are important in terms of periglacial landforms(mud circles,stony earth circles,thufurs,non-sorted steps,non-sorted stripes,congeliturbation deposits,and block currents).the descriptive statistics of 123 periglacial landforms measured by fieldworks were *** distribution of freezing and thawing in the Ilgaz Mountains throughout the year was evaluated,and it was found that freezing takes place between December and March,freezing-thawing takes place in April,May,October and November,and thawing takes place between June and *** to soil properties,organic matter content changes from 1.88%to 12.72%in non-sorted step soils,while it is between 2.03%and 12.24%in stony earth circle *** organic matter is observed to be close to congeliturbation deposits at lower ratios compared to non-sorted steps,stony earth circles and mud *** soil reactions on stony earth circles and non-sorted steps vary between slightly acidic and slightly *** the other hand,soil samples taken from the mud circles are different from those taken from the non-sorted steps and stony earth *** soil reaction is acidic,and pH changes between 4.86 and *** lime content also varies between 2.81%and 32.08%,with an average of 12.02%.the texture properties of soils are dominantly loam and clay loam,as in the non-sorted steps,stony earth circles,and mud *** their mineralogical properties,the XRD study was carried out to determine the primer mineral

关键词： periglacial landforms soil formation climate effect Ilgaz Mountains türkiye

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A New Proof for Congruent Number’s Problem via Pythagorician Divisors

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Advances in Pure Mathematics 2024年第4期14卷 283-302页

作者： léopold Dèkpassi Keuméan François Emmanuel tanoé UFR Mathematics and Computer Science F&#233lix Houphou&#235t Boigny University Abidjan Cote d&#8217Ivoire

Considering Pythagorician divisors theory which leads to a new parameterization, for Pythagorician triplets ( a,b,c )∈ ℕ 3∗ , we give a new proof of the well-known problem of these particular squareless numbers n∈ ℕ ∗ , called congruent numbers, characterized by the fact that there exists a right-angled triangle with rational sides: ( A α ) 2 + ( B β ) 2 = ( C γ ) 2 , such that its area Δ= 1 2 A α B β =n;or in an equivalent way, to that of the existence of numbers U 2 , V 2 , W 2 ∈ ℚ 2∗ that are in an arithmetic progression of reason n;Problem equivalent to the existence of: ( a,b,c )∈ ℕ 3∗ prime in pairs, and f∈ ℕ ∗ , such that: ( a−b 2f ) 2 , ( c 2f ) 2 , ( a+b 2f ) 2 are in an arithmetic progression of reason n;And this problem is also equivalent to that of the existence of a non-trivial primitive integer right-angled triangle: a 2 + b 2 = c 2 , such that its area Δ= 1 2 ab=n f 2 , where f∈ ℕ ∗ , and this last equation can be written as follows, when using Pythagorician divisors: (1) Δ= 1 2 ab= 2 S−1 d e ¯ ( d+ 2 S−1 e ¯ )( d+ 2 S e ¯ )=n f 2;Where ( d, e ¯ )∈ ( 2ℕ+1 ) 2 such that gcd( d, e ¯ )=1 and S∈ ℕ ∗ , where 2 S−1 , d, e ¯ , d+ 2 S−1 e ¯ , d+ 2 S e ¯ , are pairwise prime quantities (these parameters are coming from Pythagorician divisors). When n=1 , it is the case of the famous impossible problem of the integer right-angled triangle area to be a square, solved by Fermat at his time, by his famous method of infinite descent. We propose in this article a new direct proof for the numbers n=1 (resp. n=2 ) to be non-congruent numbers, based on an particular induction method of resolution of Equation (1) (note that this method is efficient too for general case of prime numbers n=p≡a ( ( mod8 ) , gcd( a,8 )=1 ). to prove it, we use a classical proof by induction on k , that shows the non-solvability property of any of the following systems ( t=0 , corresponding to case n=1 (resp. t=1 , corresponding to case n=2 )): ( Ξ t,k ){ X 2 + 2 t ( 2 k Y ) 2 = Z 2 X 2 + 2

关键词： Prime Numbers-Diophantine Equations of Degree 2 & 4 Factorization Greater Common Divisor Pythagoras Equation Pythagorician triplets Congruent Numbers Inductive Demonstration Method Infinite Descent BSD Conjecture

前言:青藏高原及其周边综合地层、生物群与古地理演化

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中国科学：地球科学 2024年第4期54卷 911-914页

作者：沈树忠丁林朱茂炎王向东邓涛南京大学地球科学与工程学院关键地球物质循环前沿科学中心内生金属成矿机制研究国家重点实验室南京210023 中国科学院青藏高原研究所青藏高原地球系统全国重点实验室北京100101 中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室南京210008 中国科学院大学地球与行星科学学院北京100049 中国科学院古脊椎动物与古人类研究所中国科学院脊椎动物演化与人类起源重点实验室北京100044

青藏高原研究对揭示地史时期全球构造、古地理、生物与环境等的演化都具有举足轻重的作用.文章介绍了“青藏高原及其周边综合地层、生物群与古地理演化”专辑的组织背景、主要内容和期望目标,同时总结了本专辑成果相比第一次青藏高原科... 详细信息

青藏高原研究对揭示地史时期全球构造、古地理、生物与环境等的演化都具有举足轻重的作用.文章介绍了“青藏高原及其周边综合地层、生物群与古地理演化”专辑的组织背景、主要内容和期望目标,同时总结了本专辑成果相比第一次青藏高原科考报告的显著进展.

关键词：期望目标生物群全球构造生物与环境青藏高原周边

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MRI征象预测极早期至中期肝细胞肝癌切除术后生存期

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国际医学放射学杂志 2024年第4期 497-498页

作者： H.Y.Jiang Y.Qin H.Wei t.Y.Zheng t.Yang Y.A.Wu 程昊

摘要目的对比增强MRI可以为肝细胞肝癌（HCC）病人提供个体化的预后信息，研究旨在探讨MRI征象对早期无复发生存（≤2年，E-RFS）、晚期无复发生存（>2年，l-RFS）

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高阶网络统计指标综述

Adaptive Fourier Decomposition of the First three SARS-CoV-2 Infection Waves with Epidemic Intervention—london,UK,2020-2022

物理学报 2024年第12期73卷 60-77页

作者：刘波曾钰洁杨荣湄吕琳媛电子科技大学基础与前沿研究院成都 610054 电子科技大学长三角研究院(湖州) 湖州 313001 电子科技大学基础与前沿研究院成都 610054 中国科学技术大学网络空间安全学院合肥 230026 电子科技大学基础与前沿研究院成都 610054 电子科技大学长三角研究院(湖州) 湖州 313001

复杂网络是描述和理解现实世界中复杂系统的有力工具.近年来,为了更准确地描述复杂网络中的交互关系,或者从高阶视角分析成对交互作用网络,许多学者开始使用高阶网络进行建模,并在研究其动力学过程中发现了与成对交互作用网络不同的新现... 详细信息

复杂网络是描述和理解现实世界中复杂系统的有力工具.近年来,为了更准确地描述复杂网络中的交互关系,或者从高阶视角分析成对交互作用网络,许多学者开始使用高阶网络进行建模,并在研究其动力学过程中发现了与成对交互作用网络不同的新现象.然而,与成对交互作用网络相比,高阶网络的研究相对较少;而且,高阶网络结构相对复杂,基于结构的统计指标定义较为分散且形式不统一,这些都给描述高阶网络的拓扑结构特征带来了困难.鉴于此,本文综述了两种最常见的高阶网络——超图和单纯形网络——常用的统计指标及其物理意义.本文有助于加深对高阶网络的理解,促进对高阶网络结构特征的定量化研究,也有助于研究者在此基础上开发更多适用于高阶网络的统计指标.

关键词：高阶网络超图单纯形网络统计指标

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China CDC weekly 2024年第21期6卷 478-486,I0006-I0008页

作者： Zige liu Guibin lu Cheokieng Vong Zhiqi Zeng Wei He Zhijie lin Cuiyun lin Kaichin Hsieh Zifeng Yang Arlindo l.Oliveira Chitin Hon Department of Engineering Science Faculty of Innovation EngineeringMacao University of Science and TechnologyMacao SARChina Queen Ethelburga’s Collegiate Thorpe Underwood EstateYorkUK State Key laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou CityGuangdong ProvinceChina Respiratory Disease AI laboratory on Epidemic and Medical Big Data Instrument Applications Department of Engineering ScienceFaculty of Innovation EngineeringMacao University of Science and TechnologyMacao SARChina Guangzhou Key laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases KingMed School of Laboratory MedicineGuangzhou Medical UniversityGuangzhou CityGuangdong ProvinceChina Faculty of Innovation Engineering School of Computer Science and EngineeringMacao University of Science and TechnologyMacao SARChina University College london UCL Faculty of Engineering SciencesLondonUK Guangzhou laboratory Guangzhou CityGuangdong ProvinceChina Instituto de Engenharia de Sistemas e Computadores:Investigação e Desenvolvimento em lisboa LisboaPortugal Instituto Superior técnico Universidade de LisboaLisboaPortugal

Background:this study provides a detailed analysis of the daily fluctuations in coronavirus disease 2019(COVID-19)case numbers in london from January 31,2020 to February 24,*** primary objective was to enhance understanding of the interactions among government pandemic responses,viral mutations,and the subsequent changes in COVID-19 case ***:We employed the adaptive Fourier decomposition(AFD)method to analyze diurnal changes and further segmented the AFD into novel multi-component groups consisting of one to three *** restructured components were rigorously evaluated using Pearson correlation,and their effectiveness was compared with other signal analysis *** study introduced a novel approach to differentiate individual components across various time-frequency scales using basis decomposition ***:Analysis of london’s daily COVID-19 data using AFD revealed a strong correlation between the“stay at home”directive and high-frequency components during the first epidemic *** indicates the need for sustained implementation of vaccination policies to maintain their ***:the AFD component method provides a comprehensive analysis of the immediate and prolonged impact of governmental policies on the spread of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).this robust tool has proven invaluable for analyzing COVID-19 pandemic data,offering critical insights that guide the formulation of future preventive and public health strategies.

关键词： offering sustained london

Mast cell activation syndrome:An up-to-date review of literature

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World Journal of Clinical Pediatrics 2024年第2期13卷 104-113页

作者： ÖnerÖzdemir Gökçe Kasımoğlu Ayşegül Bak Hüseyin Sütlüoğlu Süreyya Savaşan Department of Pediatric Allergy and Immunology Sakarya UniversitySakaryaAdapazarı54100Türkiye Department of Pediatrics Sakarya UniversitySakaryaAdapazarı54100Türkiye Department of Pediatrics Kocaeli City HospitalKocaeli 50123Türkiye Department of Pediatrics Children’s Hospital of MichiganHematology/OncologyCentral Michigan University College of MedicineMount PleasantMI 48859United States Barbara Ann Karmanos Cancer Institute Wayne State UniversityDetroitMI 12345United States

Mast cells are a subtype of white blood cells and are involved in the immune *** cells contain many chemical substances called mediators,which are involved in the allergic *** fact that mast cells play a role in many events that require urgent intervention,especially anaphylaxis,has led to a more detailed study of these *** diseases also caused by dysfunctions of mast cells have been examined in many *** instance,mast cell activation syndrome is known as an augmented number of cells due to decreased cell death,resulting in clinical symptoms affecting many *** main common symptoms include flushing,hypotension,urticaria,angioedema,headache,vomiting and *** the underlying mechanism is not yet clearly known,we aim to review the literature in a broad perspective and bring together the existing knowledge in the light of the literature due to the diversity of its involvement in the body and the fact that it is a little known syndrome.

关键词： Mast cell Mast cell activation syndrome tryptase Histamine