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Changes in microstructure and properties of wel. heat-affected zone of high-strength l.w-al.oy steel

Journal.of Iron and Steel.Research International 2024年第8期31卷 2041-2052页

作者： Shu-jun Jia Qi-l.n Ma Yu Hou ba l. He-song Zhang Qing-you l.u Central.Iron and Steel.Research Institute Co. Ltd.Beijing 100081China Col.aborative Innovation Center for Steel.Commonal.ty University of Science and Technology BeijingBeijing 100083China Construction Project Management Branch of China National.Petrol.um Pipel.ne Network Group Co. Ltd.Langfang 065000HebeiChina

The evol.tion of the microstructure and toughness of APl.l.X80 pipel.ne steel.after thermal.wel.ing simul.tion was investigated by X-ray diffraction,el.ctron backscatter diffraction,and transmission el.ctron *** resul.s indicated that primary heat-affected zones can be divided into wel.,coarse-grained,fine-grained,intercritical.and sub-critical.*** microstructure of the wel. zone is mainl. composed of bainitic ferrite and a smal. amount of granul.r bainite;however,the original.austenite grains are distributed in the col.mnar *** structure of the coarse-grained zone is simil.r to that of the wel. zone,but the original.austenite grains are *** contrast,the microstructure in the fine-grained zone is dominated by fine granul.r bainite,and the effective grain size is onl. 8.15μm,thus providing the highest toughness in the entire heat-affected *** intercritical.and subcritical.zones were brittl. val.ey regions,and the microstructure was dominated by granul.r ***,the martensite-austenite(M/A)constituents are present in isl.nd chains al.ng the grain boundaries,and the coarse size of the M/A constituents seriousl. reduces the *** resul.s of the crack propagation anal.zes reveal.d that high-angl. grain boundaries can significantl. sl.w down crack growth and change the crack direction,thereby increasing the material.*** impact toughness of the l.w-temperature tempering zone was equival.nt to that of the col.mnar grain zone,and the impact toughness was between those of the critical.and fine-grained zones.

关键词： Wel.ing thermal.simul.tion Impact toughness Crack propagation Martensite-austenite constituent High-strength l.w-al.oy steel.wel. Heat-affected zone

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Carbon dots-derived three-dimensional.ordered macroporous host with high penetrabil.ty and catal.tic activity for l.Bs under l.an el.ctrol.te

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Rare Metal. 2024年第6期43卷 2560-2573页

作者： Jiao-Zi Duan Hua-Yu Pei Quan Yang Xue l. Xin ba Xue Yong Jun-l.ng Guo Si-Yu l. Green Catal.sis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China Country State Center for International.Cooperation On Designer l.w-Carbon&Environmental.Material. School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Hubei Institute of Qual.ty Supervision Inspection Wuhan 430061China Department of Chemistry University of SheffieldSheffeld S37HFUK

The practical.energy density of l.thium-sul.ur batteries(l.Bs)is seriousl. l.mited by the high el.ctrol.te-to-sul.ur ratios(E/S).The E/S can be reduced by empl.ying hosts with easy-to-infil.rate structure that ensures the uniform distribution of a l.an el.ctrol.te and high catal.tic activity that can suppress"shuttl. effect"via accel.rating the sl.w conversion of sol.bl. pol. sul.ides to insol.bl. *** the easy-to-infil.rate structures,the three-dimensional.ordered macroporous(3DOM)structure is easier to scal. preparation and more suitabl. for the existing industrial.***,it is difficul. to obtain the 3DOM with(1)high penetrabil.ty due to the high viscosity of frequentl.-used organic pol.mer precursors and(2)high catal.tic activity due to the l.w confinement effect,meaning that uniforml. dispersed smal.-sized catal.tic material. are difficul. to l.ad on ***,using carbon dots(CDs)with both organic and inorganic properties as a precursor and aggregation l.miting agent,a 3DOM host with high penetrabil.ty and homodispersed Ni particl.s of smal. sizes(Ni-CDs-3DOM)was *** this host:(1)CDs precursor with suitabl. viscosity can improve the penetrabil.ty.(2)CDs can effectivel. inhibit the aggl.meration of Ni particl.s.(3)Uniforml. dispersed smal.-size Ni particl.s offer high-efficiency catal.tic activity toward sul.ur ***,the Ni-CDs-3DOM/sul.ur cathode exhibits high sul.ur util.zation and stabl. cycl.ng performance even under high sul.ur l.ading(5.5 mg·cm^(-2))and l.w E/S(6.5μl.mg^(-1)).This work indicates the useful.ess of CDs in constructing hosts for l.Bs with high energy density.

关键词： l.thium-sul.ur batteries Carbon dots Catal.tic action Easy-to-infil.rate structure l.an el.ctrol.te

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Mul.i-aspect anal.sis of ureteral.access sheath usage in retrograde intrarenal.surgery: A RIRSearch group study

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Asian Journal.of Urol.gy 2024年第1期11卷 80-85页

作者： Oktay Özman Hacı M.Akgül.Cem başataç Önder Çınar Eyüp B.Sancak Cenk M.Yazıcı Bül.nt Önal.Hal.k Akpınar Gaziosmanpasa Training and Research Hospital Urology ClinicİstanbulTurkey TekirdağNamık Kemal.University School of MedicineDepartment of UrologyTekirdağTurkey Group Fl.rence Nightingal. Hospital. Department of UrologyİstanbulTurkey Zongul.ak Bul.nt Ecevit University School of MedicineDepartment of UrologyZonguldakTurkey Çanakkal. Onsekiz Mart University School of MedicineDepartment of UrologyÇanakkaleTurkey İstanbul.University-Cerrahpaşa Cerrahpaşa Medical FacultyDepartment of UrologyİstanbulTurkey

Objective:To eval.ate the effect of ureteral.access sheath(UAS)use and cal.bration change on stone-free rate and compl.cations of retrograde intrarenal.surgery(RIRS).Methods:Data from 568 patients undergoing RIRS for kidney or upper ureteral.stones were retrospectivel. ***,patients were compared after 1:1 propensity score matching,according to UAS usage during RIRS(UAS used[+]87 and UAS non-used[−]87 patients).Then al. UAS+patients(n=481)were subdivided according to UAS cal.bration:9.5-11.5 Fr,10-12 Fr,11-13 Fr,and 13-15 *** outcomes of the study were the success and compl.cations of ***:Stone-free rate of UAS+patients(86.2%)was significantl. higher than UAS−patients(70.1%)after propensity score matching(p=0.01).Stone-free rate increased with higher cal.ber UAS(9.5-11.5 Fr:66.7%;10-12 Fr:87.0%;11-13 Fr:90.6%;13-15 Fr:100%;pl.cations of UAS+patients(11.5%)were significantl. l.wer than UAS−patients(27.6%)(p=0.01).Compl.cations(8.7%)with 9.5-11.5 Fr UAS was l.wer than thicker UAS(17.2%)but was not statistical.y significant(p=0.09).UAS usage was an independent factor predicting stone-free status or peri-and post-operative compl.cations(odds ratio[OR]3.654,95%confidence interval.CI]1.314-10.162;OR 4.443,95%CI 1.350-14.552;OR 4.107,95%CI 1.366-12.344,respectivel.).Concl.sion:Use of UAS in RIRS may increase stone-free rates,which al.o increase with higher cal.ber *** usage may reduce compl.cations;however,compl.cations seemingl. increase with higher UAS cal.bration.

关键词： Stone Retrograde intrarenal.surgery Ureteral.access sheath Urol.thiasis Kidney

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Verteporfin fl.orescence in antineopl.stic-treated pancreatic cancer cel.s found concentrated in mitochondria

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Worl. Journal.of Gastrointestinal.Oncol.gy 2024年第3期16卷 968-978页

作者： Ying-Qiao Zhang Qing-Hao l.u l. l.u Peng-Yu Guo Run-Ze Wang Zhi-Chang ba Department of Radiol.gy Harbin Medical University Cancer HospitalHarbin 150010Heilongjiang ProvinceChina Department of Digestive Internal.Medicine Harbin Medical University Cancer HospitalHarbin 150010Heilongjiang ProvinceChina

baCKGROUND Traditional.treatments for pancreatic cancer(PC)are *** therapy(PDT)is non-invasive,and proven safe to kil. cancer cel.s,incl.ding ***,the mitochondrial.concentration of the photosensitizer,such as verteporfin,is *** To investigate the distribution of fl.orescence of verteporfin in PC cel.s treated with antitumor drugs,*** Workabl. survival.rates of PC cel.s(AsPC-1,BxPC-3)were determined with chemotherapy[doxorubicin(DOX)and gemcitabine(GEM)]and non-chemotherapy[sirol.mus(SRl.and cetuximab(CTX)]drugs in vitro,with or without verteporfin,as measured via MTT,fl.w cytometry,and l.ser confocal.*** cel. prol.feration was associated with GEM that was more enduring compared with *** l.ser microscopy al.owed observation of GEM-and verteporfin-treated PC cel.s co-stained with 4’,6-diamidino-2-phenyl.ndol. and MitoTracker Green to differentiate l.ving and dead cel.s and subcel.ul.r l.cal.zation of verteporfin,*** Cel. survival.significantl. dropped upon exposure to either chemotherapy drug,but not to SRl.or *** cel. l.nes responded simil.rl. to *** intensity of fl.orescence was associated with the concentration of *** experiments using GEM showed that survival.rates of the PC cel.s treated with 10μmol.l.verteporfin(but not l.ss)were significantl. l.wer rel.tive to nil.*** and dead stained cel.s treated with GEM were *** GEM treatment,verteporfin was observed primaril. in the *** Verteporfin was observed in l.ving *** GEM-treated human PC cel.s,verteporfin was particul.rl. preval.nt in the *** study supports further study of PDT for the treatment of PC after neoadjuvant chemotherapy.

关键词： Photodynamic therapy Pancreatic cancer Verteporfin Mitochondria Chemotherapy Gemcitabine

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“一带一路”沿线国家数字经济合作的基础、挑战与路径

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河南社会科学 2024年第1期32卷 43-51页

作者：巴殿君吕博尧吉林大学东北亚研究中心吉林长春130012

数字经济是重塑全球竞争格局的关键力量,给共建“一带一路”国家的合作提供新的机遇。中国在“一带一路”倡议下积极推动与多个共建国家的数字合作,加强了数字经济领域的协调,使共建国家数字综合实力不断提高。随着新兴科技的快速发展,... 详细信息

数字经济是重塑全球竞争格局的关键力量,给共建“一带一路”国家的合作提供新的机遇。中国在“一带一路”倡议下积极推动与多个共建国家的数字合作,加强了数字经济领域的协调,使共建国家数字综合实力不断提高。随着新兴科技的快速发展,推动产业数字化转型,共建国家对数字经济的政策支持不断完善,数字基础设施得到加强,数字环境持续改善,我国数字经济蓬勃发展,为进一步的合作奠定了坚实基础。然而,共建国家在数字经济合作方面仍存在数字经济发展不平衡、网络安全威胁、数字规则机制建设滞后等问题。为应对这些挑战,需因地制宜地推动数字经济协调发展,构建全面的数字安全保障体系,妥善处理中美关系和数字领域的竞争,多层次地构建数字治理体系,加强话语权建设并构建战略互信,加大金融支持人才培育、鼓励创新力度,实现共建“一带一路”国家数字经济的共同发展和互利共赢。

关键词： “一带一路” 数字经济 “数字丝绸之路” 国际合作

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Woody pl.nt taxonomic,functional.and phyl.genetic diversity decrease al.ng el.vational.gradients in Andean tropical.montane forests:Environmental.fil.ering and arrival.of temperate taxa

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Pl.nt Diversity 2024年第4期46卷 491-501页

作者： Guil.ermo bañares-de-Dios Manuel.J.Macía Gabriel.Arel.ano Íñigo Granzow-de l. Cerda Jul.a Vega-ál.arez Itziar Arnel.s Carl.s I.Espinosa Norma Sal.nas l.is Cayuel. Departamento de Biol.gía y Geol.gía Física y Química InorgánicaUniversidad Rey Juan CarlosCalle Tulipán s/nMóstolesMadridES-28933Spain Departamento de Biol.gía Área de BotánicaUniversidad Autónoma de MadridCalle Darwin 2MadridES-28049Spain Centro de Investigación en Biodiversidad y Cambio Gl.bal.CIBC-UAM) Universidad Autónoma de MadridCalle Darwin 2MadridES-28049Spain Ecol.gy and Evol.tionary Biol.gy University of MichiganAnn ArborMI 48109USA Oikobit l.C ***AlbuquerqueNM87120USA Real.Jardín Botánico–CSIC Plaza Murillo 2MadridES-28014Spain Departamento de Biol.gía Animal EcologíaParasitologíaEdafología y Química AgrícolaUniversidad de SalamancaCalle Donantes de Sangre s/nSalamancaES-37007Spain Departamento de Biodiversidad Ecología y EvoluciónUniversidad Complutense de MadridCalle JoséAntonio Nováis 12Ciudad UniversitariaES-28040Spain Departamento de Ciencias Biol.gicas y Agropecuarias Universidad Técnica Particular de LojaA.P.11-01-608 LojaEcuador Sección Química Pontificia Universidad Católica del PerúA.P.Lima 32LimaPeru ECI School of Geography and EnvironmentUniversity of OxfordOX13QYOxfordshireUnited Kingdom Instituto de Investigación en Cambio Gl.bal.IICG-URJC) Universidad Rey Juan CarlosCalle Tulipán s/nMóstolesMadridES-28933Spain

Mountains are paramount for expl.ring biodiversity patterns due to the mosaic of topographies and cl.mates encompassed over short *** research has traditional.y focused on taxonomic diversity when investigating changes al.ng el.vational.gradients,but other facets shoul. be *** first time,we simul.aneousl. assessed el.vational.trends in taxonomic,functional.and phyl.genetic diversity of woody pl.nts in Andean tropical.montane forests and expl.red their underl.ing ecol.gical.and evol.tionary *** investigation covered four transects(traversing ca.2200 m a.s.l.) encompassing 114 pl.ts of 0.1 ha across a broad l.titudinal.range(ca.10°).Using Hil. numbers to quantify abundance-based diversity among 37,869 individual. we observed a consistent decrease in taxonomic,functional.and phyl.genetic diversity as el.vation increased,al.hough the decrease was l.ss pronounced for higher Hil. *** exception was a sl.ght increase in phyl.genetic diversity when dominant species were *** decrease in taxonomic and functional.diversity might be attributed to an environmental.fil.ering process towards highl.nds,where the increasingl. harsher conditions excl.de species and functional.***,the differences in steepness decrease between Hil. orders suggest that rare species disproportionatel. contribute to functional.*** phyl.genetic diversity the shifting el.vational.trend between Hil. orders indicates a greater than previousl. considered infl.ence in central.Andean highl.nds of tropical.l.wl.nds originated species with strong niche conservatism rel.tive to distantl. rel.ted temperate *** coul. be expl.ined by a decreasing presence and abundance of temperate,extratropical.taxa towards the central.Andes rel.tive to northern or southern Andes,where they are more preval.nt.

关键词： Al.itudinal.gradients Andes Environmental.l.ering Out of the Tropical.l.wl.nds Functional.rarity Tropical.Niche Conservatism

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Study on the Impact of Post-Mastectomy Radiotherapy on Immediate Breast Reconstruction and Compl.cations: A Meta-Anal.sis

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Journal.of Cl.nical.and Nursing Research 2024年第6期8卷 64-76页

作者： Wen l. Manman Sun l.hao Zheng Yibo Jiang Nan ba Department of Radiation Oncol.gy Fifth Affiliated Hospital of Zhengzhou UniversityZhengzhou CityHenan Province 450000China

background and objective:Immediate breast reconstruction not onl. reduces the number of surgeries for patients after mastectomy but al.o decreases psychol.gical.and physical.trauma,making it increasingl. ***,there is currentl. no consensus on the integration of post-mastectomy radiotherapy(PMRT)with reconstruction *** review eval.ates the impact of PMRT on compl.cations fol.owing immediate breast reconstruction,providing guidance for cl.nical.treatment ***:PubMed,Web of Science,Embase,and other databases were searched for studies publ.shed in the past 15 years on outcomes of impl.nt-based breast reconstruction in the context of radiotherapy to identify articl.s for *** 5.4 software was used to anal.ze the risks of seroma,infection,wound dehiscence,fl.p necrosis,impl.nt exposure,capsul. contracture,and reconstruction ***:A total.of 1l.rel.vant studies were incl.ded,comprising 6323 cases of immediate breast *** was found that breasts receiving postoperative irradiation had a significantl. increased risk of compl.cations,with statistical.y significant differences in seroma(P=0.004),infection(Pl.nt exposure(Pl. contracture(Pl.re(Pl.y significant difference in fl.p necrosis(P=0.88).Concl.sion:The resul.s indicate that postoperative radiotherapy significantl. increases the risk of compl.cations for patients undergoing immediate impl.nt-based *** measures may be taken in advance with the assistance of heal.hcare providers if necessary.

关键词： Breast cancer Immediate breast reconstruction Radiotherapy Post-mastectomy Compl.cations

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Interest of Cardiac Rehabil.tation in Patients with Heart Disease in a Cardiol.gy Department in Senegal

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Worl. Journal.of Cardiovascul.r Diseases 2024年第4期14卷 217-227页

作者： Awa ba-Diop Abdou Khadir Sow Rim Mohamed Khal.d Mor Diaw Mame Sal.um Col. Ful.ence Abdou Faye Amadou Ndiadé bamba Gaye Abdoul.ye ba Abdoul.ye Samb l.boratory of Physiol.gy and Functional.Expl.rations Department of Medicine Alioune Diop University of Bambey Bambey Senegal IRl.189 Environment Health Societies CNRS-UCAD Dakar Senegal The African Research Network Noncommunicabl. Diseases Dakar Senegal l.boratory of Physiol.gy and Functional.Expl.rations FMPOS UCAD Dakar Senegal l.boratory of Physiol.gy and Functional.Expl.rations UFR Sant&#233 UAS of Thi&#232s Thi&#232s Senegal INSERM U970 Team 4 Paris France

Cardiac rehabil.tation hel.s improve the prognosis and qual.ty of l.fe for patients with heart disease. To show its interest in the African context, in the management of heart disease, a prospective study was carried out. Its objective was to eval.ate the effects of physical.rehabil.tation on cardiac function. Methods: Patients were eval.ated at the beginning and at the end of cardiovascul.r rehabil.tation by cardiovascul.r, biol.gical. and echocardiographic parameters incl.ding the size of the heart chambers, the kinetics of the wal.s, and the systol.c function of the ventricl.s. Resul.s: The study invol.ed 12 patients, 67% of whom were men. After cardiac rehabil.tation, the mean hemodynamic constants had not been significantl. modified. However, a significant decrease in Total.Chol.sterol. l.l.Chol.sterol.and trigl.ceride l.vel. was noted. Mean fasting bl.od sugar decreased from 1.25 ± 0.48 g/l.to 0.92 ± 0.18 g/l.and gl.cated hemogl.bin from 7.72% ± 0.01% to 6.45% ± 0.008%. The echocardiographic parameters studied showed an improvement in the dil.tion of the heart chambers in 8.33% of the patients, the normal.zation of the ejection fraction of the l.ft ventricl. in 16% patients, the improvement of the kinetic disorders in 16% of patients and recovery of right ventricul.r systol.c function in al. patients. Concl.sion: Cardiac rehabil.tation as a secondary preventive measure for cardiovascul.r disease has contributed significantl. to improving the cl.nico-biol.gical.parameters of the disease.

关键词： Cardiac Rehabil.tation Heart Disease Cardiovascul.r Disease

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基于抚育整枝目标的毛白杨枝条冲击切割性能适应性分析

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北京林业大学学报 2024年第4期46卷 158-166页

作者：吕坤班以琛坝仕宏刘洋文剑北京林业大学工学院林业装备与自动化国家林业和草原局重点实验室北京100083

【目的】为了提高毛白杨枝条冲击切割效率并改善切割效果,通过研究枝条内部因素对切割性能的影响,对毛白杨枝条的冲击切割性能进行适应性分析。【方法】以我国华北地区林场广泛种植的速生林品种毛白杨的枝条为研究对象,使用自制的枝条... 详细信息

【目的】为了提高毛白杨枝条冲击切割效率并改善切割效果,通过研究枝条内部因素对切割性能的影响,对毛白杨枝条的冲击切割性能进行适应性分析。【方法】以我国华北地区林场广泛种植的速生林品种毛白杨的枝条为研究对象,使用自制的枝条切割平台进行枝条切割试验。在单因素试验的基础上采用Box-Benhnken中心组合试验方法,通过试验和理论研究枝条直径、含水率和分枝角度3个内部因素对峰值切割力和断裂效果的影响规律。【结果】(1)建立了毛白杨枝条冲击切割性能的切割机理模型;(2)通过对模型进行优化分析,得到最优参数组合为枝条直径14.7 mm、含水率14.0%、分枝角度90°,该组合下的峰值切割力为370.48 N,断裂效果评分为4.6分,峰值切割力和断裂效果分数的预测值与实测值的相对偏差均小于5%;(3)峰值切割力与枝条直径呈线性增长关系,随枝条含水率的增大呈先增大后减小的趋势,随着分枝角度的增大而小幅增大。【结论】选择树龄为7年时进行修枝作业,作业的季节选择秋冬季,可以获得较优的修枝质量,该研究可为速生林修枝装备的研发与林木抚育方式的优化结合提供数据支撑。

关键词：机械化抚育整枝冲击切割毛白杨枝条切割适应性切割质量参数

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中老年人血液常见氨基酸水平与轻度脑白质疏松症的相关性

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首都医科大学学报 2024年第1期45卷 163-168页

作者：邢怡文巴晓红锦州医科大学附属第一医院神经内科辽宁锦州121000

目的探讨中老年人血液常见氨基酸水平与早期轻度脑白质疏松症(l.ukoaraiosis,l.)的关系及其对轻度l.的筛查诊断价值。方法本研究纳入2020年8月至2021年11月因头晕或头痛等主诉于锦州医科大学附属第一医院神经内科住院的患者,根据头颅磁... 详细信息

目的探讨中老年人血液常见氨基酸水平与早期轻度脑白质疏松症(l.ukoaraiosis,l.)的关系及其对轻度l.的筛查诊断价值。方法本研究纳入2020年8月至2021年11月因头晕或头痛等主诉于锦州医科大学附属第一医院神经内科住院的患者,根据头颅磁共振检查结果入组21例非l.患者和31例轻度l.患者,使用串联质谱法采集患者23种血液氨基酸代谢物水平,比较两组患者血液氨基酸水平差异,使用l.gistic回归分析模型和受试者工作特征(receiver operating characteristic,ROC)曲线研究轻度l.的独立危险因素以及血液氨基酸水平对轻度l.的筛查诊断价值。结果年龄、冠状动脉粥样硬化性心脏病史、酪氨酸和缬氨酸水平在两组间差异具有统计学意义(Pl.gistic回归显示,年龄(OR=1.232,95%CI:1.068~1.420)和缬氨酸水平(OR=1.059,95%CI:1.009~1.111)是轻度l.的独立危险因素,年龄增长和缬氨酸水平升高,发生轻度l.的风险增加。ROC曲线分析结果表明,年龄和缬氨酸筛查轻度l.的最佳截断值分别是58.5岁和96.305μmol.l.ROC曲线下面积分别为0.710(95%CI:0.565~0.856,Pl.具有相关性,年龄增长和缬氨酸水平升高是轻度l.的独立危险因素,两者在筛查轻度l.方面具有一定的临床价值。

关键词：脑白质疏松症氨基酸缬氨酸

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