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Influence of erbium on structural,and charged particles,photons,and neutrons shielding properties of Ba_(1-x)Er_(x)snO_(3) perovskite ceramics

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Journal of Rare Earths 2024年第4期42卷 724-732页

作者： m.K.h.Hamad Nidal Dwaikat m.H.A.mhareb m.I.Sayyed R.m.Hamad Y.S.m.Alajerami m.A.Almessiere Gameel Saleh Ahmad Hussein Alomari K.A.Ziq Department of Basic Sciences School of Social and Basics SciencesAl Hussein Technical UniversityKing Abdullah II St 242Amman11831Jordan Department of Physics College of Engineering and PhysicsInterdisciplinary Research Center for Advanced MaterialsKing Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Department of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 1982Dammam31441Saudi Arabia Basic and Applied Scientific Research Center Imam Abdulrahman Bin Faisal UniversityP0.Box 1982Dammam31441Saudi Arabia Department of Physics Faculty of ScienceIsra UniversityAmman11622Jordan Department of Nuclear medicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Arabia medical Imaging Department Applied Medical Sciences FacultyAl Azhar University-Gaza CityPo.Box 1277Palestine Department of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityPo.Box1982Dammam 31441Saudi Arabia Department of Biomedical Engineering College of EngineeringImam Abdulrahman Bin Faisal UniversityPo.Box 1982Dammam31441Saudi Energy&minerals Regulatory Commission Amman11821Jordan

Five perovskite ceramics samples of Ba_(1-x)Er_(x)snO_(3) with x=0.00,0.05,0.10,0.15,and 0.20 were synthesized using the conventional solid-state reaction *** prepared samples were characterized by X-ray diffraction(XRD),Fourier transforms infrared(FTIR),and UV-Vis *** shielding properties against ionizing radiation were also *** XRD analysis shows the perovskite cubic structure as the major phase in all *** FTIR reveals a distinctive band around 614-620 cm^(-1) ascribed to the antisymmetric O-sn-O ***-Vis spectroscopy was used to determine the bandgap according to diffuse reflectance,and the results display a fixed enhancement in the bandgap from 3.2 to 3.3 eV for all ***-ray shielding properties of the synthesized samples were experimentally measured and compared with XCOm computational *** relative differences(Δ,%)between experimental and theo retical values are low and fall within the 0.446%-7.10%*** addition of Er leads to the enhanced density,neutron,and gamma shielding *** contrast,charged particles’shielding parameters gradually reduce with rising Er *** results suggest that Ba_(1-x)Er_(x)snO_(3) samples can be used in different radiation shielding applications.

关键词： Perovskite Ceramics Gamma ray shielding mass stopping power Rare earths

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Is ypTNm staging a comparable predictor as pTNm staging for survival in non-metastatic rectal cancer after preoperative chemoradiation therapy?

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Oncology Research 2024年第11期32卷 1723-1732页

作者： JEN-pin CHUANG HSIANG-LIN TSAI WEI-CHIH SU PO-JUNG CHEN CHING-WEN HUANG TSUNG-KUN CHANG YEN-CHENG CHEN CHING-CHUN LI YUNG-SUNG YEH TZU-CHIEH YIN JAW-YUAN WANG ministry of Health and Welfare Chiayi HospitalChiayi60096Taiwan Department of Surgery Faculty of MedicineCollege of MedicineNational Cheng Kung UniversityTainan70101Taiwan Department of Surgery National Cheng Kung University HospitalTainan70101Taiwan Division of Colorectal Surgery Department of SurgeryKaohsiung Medical University HospitalKaohsiung Medical UniversityKaohsiung80708Taiwan Department of Surgery Faculty of MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiung80708Taiwan Graduate Institute of Clinical medicine College of MedicineKaohsiung Medical UniversityKaohsiung80708Taiwan Department of Surgery Faculty of Post-Baccalaureate MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiung80708Taiwan Division of Colorectal Surgery Department of SurgeryKaohsiung Municipal Hsiaokang HospitalKaohsiung80708Taiwan Division of Trauma and Surgical Critical Care Department of SurgeryKaohsiung Medical University HospitalKaohsiung Medical UniversityKaohsiung80708Taiwan Department of Emergency medicine Faculty of Post-Baccalaureate MedicineCollege of MedicineKaohsiung Medical UniversityKaohsiung80708Taiwan Department of Surgery Kaohsiung Municipal Tatung HospitalKaohsiung80145Taiwan Graduate Institute of medicine College of MedicineKaohsiung Medical UniversityKaohsiung80708Taiwan Center for Cancer Research Kaohsiung Medical UniversityKaohsiung80708Taiwan

Abstract:Background:The pTNm staging system is widely recognized as the most effective prognostic indicator for *** latest update of this staging system introduced a new pathological staging system(ypTNm)for patients receiving neoadjuvant chemoradiotherapy(NACRT).However,whether the prognostic value of the ypTNm staging system for rectal cancer is similar to that of the pTNm staging system remains *** study was conducted to compare the ypTNm and pTNm staging systems in terms of their prognostic value for patients with nonmetastatic rectal cancer undergoing *** and methods:This study was conducted at a large teaching *** January 2014 and December 2022,542 patients with rectal cancer were analyzed(median follow-up period,60 months;range,6–105 months).Of them,258 and 284 were included in the pTNm and ypTNm groups,*** probability of treatment weighting(IPTW)was performed to account for the effects of *** proportional-hazards regression was performed for the between-group comparison of overall survival(OS).Results:The crude model revealed that OS was similar between the two groups(p=0.607).After performing IPTW,we found that patients with the same ypTNm-and pTNm-classified stages had similar overall survival(hazard ratio=1.15;95%CI=0.76–1.73;p=0.5074).Conclusions:For patients with rectal cancer who have received preoperative NACRT,the prognostic value of ypTNm staging appears to be similar to that of pTNm staging,mostly because of the downstaging effect of neoadjuvant chemoradiotherapy。

关键词： pTNm ypTNm Rectal cancer Inverse probability treatment weighting Survival

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激光烧蚀压印制备疏水铝箔表面的耐久性

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光学精密工程 2024年第10期32卷 1481-1495页

作者：沈宗宝孟康楠施政付佳辉李品江苏大学机械工程学院江苏镇江212013

提出了一种激光烧蚀压印技术制备具有多级微结构的疏水铝箔表面。该技术利用激光直接辐照在工件表面,利用烧蚀诱导的冲击压印获得一级微结构,同时利用烧蚀诱导的融化材料的流动获得二级微结构。为了检验耐久性,对疏水铝箔工件进行了酸... 详细信息

提出了一种激光烧蚀压印技术制备具有多级微结构的疏水铝箔表面。该技术利用激光直接辐照在工件表面,利用烧蚀诱导的冲击压印获得一级微结构,同时利用烧蚀诱导的融化材料的流动获得二级微结构。为了检验耐久性,对疏水铝箔工件进行了酸碱腐蚀实验和不同环境存储实验。实验结果表明,酸碱腐蚀会破坏工件表面的微观形貌和低表面能,因此工件接触角随着腐蚀时间增长而降低。其中碱腐蚀工件时反应比酸腐蚀剧烈得多,工件表面形貌受损也更大,工件表面在碱腐蚀16 h后就达到了超亲水状态(25°),而酸腐蚀24 h后也依然表现为疏水性(97°)。再次进行时效处理后,工件依然能在三周后达到稳定的疏水状态,但疏水性能比腐蚀前要差,且酸腐蚀工件的最终疏水性(120°)比碱腐蚀工件(105°)要好。不同存储环境对工件表面形貌几乎没有影响。存储在空气中的工件接触角无明显变化,存储在盐水中的工件丧失疏水性(87°),存储在纯水中的工件表现比盐水稍好(96°)。再次进行时效处理后,纯水存储的工件接触角可以恢复到135°左右,而盐水存储的工件仅能恢复到120°。激光烧蚀压印制备的疏水铝箔基本能够满足应对复杂环境的要求。

关键词：激光烧蚀压印疏水性酸碱腐蚀多级微结构存储环境

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The Chinese guideline for management of snakebites

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World Journal of Emergency medicine 2024年第5期15卷 333-355页

作者： Rongde Lai Shijiao Yan Shijun Wang Shuqing Yang Zhangren Yan pin Lan Yonggao Wang Qi Li Jinlong Wang Wei Wang Yuefeng ma Zijing Liang Jianfeng Zhang Ning Zhou Xiaotong Han Xinchao Zhang mao Zhang Xiaodong Zhao Guoqiang Zhang Huadong Zhu Xuezhong Yu Chuanzhu Lyu Emergency Department the First Affi liated Hospital of Guangzhou Medical UniversityGuangzhou 510120China School of Public Health Hainan Medical UniversityHaikou 571199China Surgery Department of Traditional Chinese medicine the Affi liated People’s Hospital of Fujian University of Traditional Chinese MedicineFuzhou 350004China Emergency Department Chongqing University Central Hospital/Chongqing Emergency Medical CenterChongqing 400014China Department of Surgery of Traditional Chinese medicine Affi liated Hospital of Jiangxi University of Chinese MedicineNanchang 330006China Department of Emergency medicine the Fifth Affi liated Hospital of Wenzhou Medical University/Lishui Central HospitalLishui Hospital of Zhejiang UniversityLishui 323000China General Surgery Department the First Affi liated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006China Emergency Department Shengli Clinical Medical College of Fujian Medical UniversityFuzhou 350001China Emergency Department Chongqing University Fuling HospitalChongqing UniversityChongqing 408000China Emergency Department the First Affi liated Hospital of Guangxi Medical UniversityNanning 530021China Emergency Department the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China Emergency Department Wuming Hospital of Guangxi Medical UniversityNanning 530021China Emergency Department Central People's Hospital of ZhanjiangZhanjiang 524037China Emergency Department Hunan Provincial People's HospitalChangsha 410005China Emergency Department National Geriatrics Center of Beijing HospitalBeijing 100020China Emergency Department the Fourth Medical Center of the PLA General HospitalBeijing 100048China Emergency Department China-Japan Friendship HospitalBeijing 100029China Emergency Department Peking Union Medical College HospitalBeiJing 100730China Emergency Department Sichuan Academy of Medical Sciences/Sichuan Provincial People's HospitalChengdu 610072China Research Unit of Island Emergency

In 2009,the World Health Organization included snakebite on the list of neglected tropical diseases,acknowledging it as a common occupational hazard for farmers,plantation workers,and others,causing tens of thousands of deaths and chronic physical disabilities every *** guideline aims to provide practical information to help clinical professionals evaluate and treat snakebite *** recommendations are based on clinical experience and clinical research *** guideline focuses on the following topics:snake venom,clinical manifestations,auxiliary examination,diagnosis,treatments,and prevention.

关键词： snakebite Envenomation management Prevention

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第4代达芬奇机器人手术系统与腹腔镜辅助胃癌根治术的近期疗效对比分析

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中华胃肠外科杂志 2024年第8期27卷 808-815页

作者：范义川张驰梁品胡祥大连医科大学附属第一医院胃肠外科大连116011

目的:比较分析第4代达芬奇机器人手术系统与腹腔镜辅助胃癌根治术的近期疗效。方法:采用回顾性队列研究方法,收集大连医科大学附属第一医院2020年12月至2023年5月期间收治的190例胃癌患者临床病理资料。其中男136例,女54例;中位年龄为65... 详细信息

目的:比较分析第4代达芬奇机器人手术系统与腹腔镜辅助胃癌根治术的近期疗效。方法:采用回顾性队列研究方法,收集大连医科大学附属第一医院2020年12月至2023年5月期间收治的190例胃癌患者临床病理资料。其中男136例,女54例;中位年龄为65(30~85)岁。190例患者中,90例行机器人手术系统辅助胃癌根治性切除+消化道重建术(机器人手术组),100例行腹腔镜辅助胃癌根治性切除+消化道重建术(腹腔镜手术组)。主要观察指标为手术和术后恢复情况,以及术后并发症情况。结果:两组患者均顺利完成手术,无中转开腹。机器人手术组和腹腔镜手术组患者中位手术时间分别为315(270,360)min和240(202,280)min,中位术中出血量分别为20(10,30)ml和30(10,50)ml,中位切口长度分别为12.0(10.8,13.0)cm和10.0(8.0,10.8)cm,术后首次肛门排气中位时间分别为4(3,5)d和4(4,5)d,术后首次进食流食中位时间分别为6(4,7)d和8(6,9)d,术后拔胃管中位时间分别为4(3,7)d和6(5,8)d,拔除引流管中位时间分别为8(7,10)d和10(9,12)d,术后中位住院时间分别为8(7,11)d和12(10,14)d,手术费用分别为(7.6±1.2)万元和(4.0±0.6)万元,差异均有统计学意义(均Pm 2(OR=0.41,95%CI:0.19~0.87,P=0.023)、美国麻醉医师协会分级2~3级(OR=0.14,95%CI:0.04~0.42,P=0.001)、术前合并基础疾病(OR=0.29,95%CI:0.11~0.76,P=0.013)以及TNm分期Ⅰ~Ⅱ期(OR=0.36,95%CI:0.13~0.91,P=0.035)亚组群体中,机器人手术的总并发症率更低,差异均有统计学意义(均P<0.05)。结论:第4代达芬奇机器人手术系统辅助治疗胃癌安全可行,术后恢复较快,并发症较少。

关键词：胃肿瘤达芬奇机器人手术系统腹腔镜胃切除术疗效并发症

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Quasitoric-流形的最高维上同调的生成元的组合描述及其应用

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数学学报（中文版） 2024年第5期67卷 889-894页

作者：叶蔚聪刘昌莲刘登品广西师范大学数学与统计学院桂林541004

对任意quasitoric-流形,π:m^(2n)→P^(n),其上同调环表示为H^(*)(m^(2n),Z)=Z[F_(1),F_(2),...,F_(m)]/(T_(pn)+J_(pn)),其中F(P)={F_(1),F_(2),…,Fm}是P^(n)中所有余一维面的集合.任取P^(n)的顶点v=F_(i1)∩F_(i2)∩…∩Fin,我们证明了m^(2n)]>=±1,即[F_(i1)F_(i2)…Fin]是H^(2n)(m^(2n),Z)的生成元.我们进一步利用这一结论讨论quasitoric-流形的刚性问题,并证明如下结论:若f^(*):H^(*)(m_(1)^(2n),Z)→H^(*)(m_(2)^(2n),Z)是一个环同构,则存在一一映射f:Fix(m_(1)^(2n))→Fix(m_(2)^(2n)),这里Fix(m^(2n))是T^(n)-作用在m^(2n)上的不动点.

关键词： Quasitoric-流形示性函数上同调环

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pin-on-disc tribological characterization of single ingredients used in a brake pad friction material

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Friction 2024年第11期12卷 2576-2593页

作者： Davide CARLEVARIS Francesco VARRIALE Jens WAHLSTRÖm Cinzia mENAPACE Department of Industrial Engineering University of TrentoTrento 38123Italy Brembo S.p.A StezzanoBergamo 24040Italy Department of mechanical Engineering Sciences Lund UniversityLund 22100Sweden

Researchers have long been studying the effects of the modification of friction material compositions on their tribological *** models have also been developed,but they are of limited use in the design of new ***,this research aims to investigate the tribological behaviour of single ingredients in friction materials to develop a tribological *** dataset could then be used as a foundation for a cellular automaton(CA)predictive model,intended to be a tool for designing friction *** samples were almost entirely composed of four distinct friction material ingredients,and one sample composed of their mixture was successfully ***-on-disc(PoD)tribometer testing and scanning electron microscopy/energy-dispersive X-ray spectroscopy(SEm/EDXS)analysis were used for the tribological *** material showed distinct tribological properties and evolution of the contact surface features,and the synergistic effect of their mutual interaction was also demonstrated by their mixture.

关键词： disc brakes sliding contact wear behaviour scanning electron microscopy(SEm) modelling

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Effect of cold-working on corrosion induced damage in lug joints

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Defence Technology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath m.N Chikmath L. murthy H. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

Lug joints are preferred joineries for transferring heavy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finishes and rubbing displacement between the pin and *** causes damage of different sizes and shapes near the *** degradation due to corrosion-induced damage is modelled as a through-pit at one of the identified critical locations through stress *** effect of this pit on fatigue crack initiation life is ***-hole is pre-stressed by cold-working and the benefits of inducing plastic wake on the intended performance of the lug joint during the damages due to corrosion are brought out and compared with non-cold-worked *** analysis is performed on this lug joint with *** results obtained highlight the benefits of cold-working and the methodology can be extended to damage growth and analyse the effect of surface treatments for better structural integrity of components of aerospace vehicles.

关键词： Lug joint Corrosion Crack initiation Cold-working Structural integrity

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SiC探测器的中子和γ性能测试

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核技术 2024年第3期47卷 65-70页

作者：施海宁应红张涛唐堂宋金霖龚频汤晓斌中国广核集团有限公司苏州热工研究院有限公司苏州215004 国家核电厂安全及可靠性工程技术研究中心苏州215004 南京航空航天大学核科学与技术系南京211106

第三代SiC半导体探测器具有体积小、响应时间快、中子/伽马(n/γ)甄别容易等优点,广泛应用于反应堆堆芯剂量监测。本文针对自研的第三代SiC半导体探测器,采用电子束蒸发真空镀膜的技术将中子转换层材料^(6)LiF(^(6)Li丰度为95%)喷镀到Si... 详细信息

第三代SiC半导体探测器具有体积小、响应时间快、中子/伽马(n/γ)甄别容易等优点,广泛应用于反应堆堆芯剂量监测。本文针对自研的第三代SiC半导体探测器,采用电子束蒸发真空镀膜的技术将中子转换层材料^(6)LiF(^(6)Li丰度为95%)喷镀到SiC基底上,厚度为25μm,实现了中子转换层厚度优化。利用^(241)Amα放射源(活度9.37×10^(3)Bq)开展α粒子响应信号幅度的测量,并在^(137)Csγ放射源(活度6.23×10^(7)Bq)环境下开展γ射线的响应测试。另外,在标准辐射场系统中进行了SiC探测器的中子注量率响应线性度测量、γ剂量率响应线性度测量以及中子注量率响应线性标定。结果表明:该探测器在1×10^(3)~1×10^(6)cm^(−2)·s^(−1)中子注量率范围内线性响应拟合R^(2)=0.9969,具有良好的线性响应,n/γ剂量响应范围为0.005~20 Gy∙h^(−1),可用于核电现场反应堆中子和γ剂量的实时、精确监测。

关键词：碳化硅探测器中子注量率 γ剂量线性响应

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综掘工作面风幕阻尘效果影响因素研究

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工矿自动化 2024年第1期50卷 72-79页

作者：夏丁超吕品杜朋王金月安徽理工大学安全科学与工程学院安徽淮南232001

目前综掘工作面粉尘污染的研究多集中于单一因素对综掘工作面风幕阻尘效果的影响,而未充分考虑各因素间的交互作用,使得压风分流技术的工程应用效果欠佳。为明确附壁风筒径向出风距离、径向出风比及轴向出风距离对风幕阻尘效果的影响,... 详细信息

目前综掘工作面粉尘污染的研究多集中于单一因素对综掘工作面风幕阻尘效果的影响,而未充分考虑各因素间的交互作用,使得压风分流技术的工程应用效果欠佳。为明确附壁风筒径向出风距离、径向出风比及轴向出风距离对风幕阻尘效果的影响,以潘三矿810西翼机巷综掘工作面为研究对象,运用Fluent软件对径向出风距离为10~25 m、径向出风比为0.6~0.9及轴向出风距离为6~12 m条件下的风流分布和粉尘扩散情况进行数值模拟。结果表明:(1)随着径向出风距离增大,径向涡流风幕在巷道内的转变更充分,综掘机司机前端的风流分布越均匀,更有利于形成风速方向均指向工作面的轴向阻尘风幕。当径向出风距离为10 m时,距工作面7 m断面内涡流特性明显,风速方向紊乱;当径向出风距离为25 m时,距工作面7 m断面内,风流分布趋于均匀,风速方向均指向工作面,形成了能够覆盖全断面的轴向阻尘风幕。(2)随着径向出风比增大,整流风筒轴向风流风量减小,轴向风流风速和射流强度降低,轴向风流对综掘工作面前端气流的扰动减弱;径向出风比越大,越有利于形成风流方向指向工作面且能覆盖全断面的轴向阻尘流场,即轴向阻尘风幕。(3)径向涡流风幕的阻尘能力随径向出风比的增大先增强后减弱,轴向阻尘风幕的阻尘能力随径向出风比的增大而不断增强。(4)在采取压风分流风幕阻尘技术后,当压风总量为300 m^(3)/min,吸风量为400 m^(3)/min,附壁风筒径向出风距离为20 m,径向出风比为0.9,整流风筒轴向出风距离为8~10 m时,能很好地将粉尘聚集在吸尘口附近,达到高效控尘除尘的目的。在810西翼机巷综掘工作面进行现场测试,测点风速和粉尘质量浓度实测值与模拟值基本一致,高浓度粉尘被有效阻控于工作面前端,隔尘效果较为明显,验证了数值模拟的有效性。

关键词：综掘工作面风幕阻尘长压短抽附壁风筒压风分流风流分布粉尘扩散

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