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Modeling Method of C/C-ZrC Composites and Prediction of Equivalent Thermal Conductivity Tensor Based on Asymptotic Homogenization

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工程与科学中的计算机建模(英文) 2024年第1期138卷 391-410页

作者： Junpeng Lyu hai mei Liping Zu Lisheng Liu Liangliang Chu Department of Mechanics and Engineering Structure Wuhan University of TechnologyWuhan430070China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of TechnologyWuhan430070China

This article proposes a modeling method for C/C-ZrC composite *** to the superposition of Gaussian random field,the original gray model is obtained,and the threshold segmentation method is used to generate the C-ZrC inclusion ***,the fiber structure is added to construct the microstructure of the three-phase plain weave *** reconstructed inclusions can meet the randomness of the shape and have a uniform *** an algorithm based on asymptotic homogenization and finite element method,the equivalent thermal conductivity prediction of the microstructure finite element model was carried out,and the influence of component volume fraction on material thermal properties was *** sensitivity of model parameters was studied,including the size,mesh sensitivity,Gaussian complexity,and correlation length of the RVE model,and the optimal calculation model was *** results indicate that the volume fraction of the inclusion phase has a significant impact on the equivalent thermal conductivity of the *** the volume fraction of carbon fiber and ZrC increases,the equivalent thermal conductivity tensor gradually *** model can be used to explore the impact of materialmicrostructure on the results,and numerical simulations have studied the relationship between structure and performance,providing the possibility of designing microstructure based on performance.

关键词： 3D reconstruction randomheterogeneous media microstructure asymptotic homogenization effective properties

Quasi-plastic deformation mechanisms and inverse Hall-Petch relationship in nanocrystalline boron carbide under compression

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Chinese Physics B 2024年第8期33卷 405-413页

作者：岳珍李君刘立胜梅海 Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of TechnologyWuhan 430070China

Grain boundaries(GBs)play a significant role in the deformation behaviors of nanocrystalline ***,we investigate the compression behaviors of nanocrystalline boron carbide(nB_(4)C)with varying grain sizes using molecular dynamics simulations with a machine-learning force *** results reveal quasi-plastic deformation mechanisms in nB_(4)C:GB sliding,intergranular amorphization and intragranular *** sliding arises from the presence of soft GBs,leading to intergranular *** amorphization arises from the interaction between grains with unfavorable orientations and the softened amorphous GBs,and finally causes structural ***,nB_(4)C models with varying grain sizes from 4.07 nm to 10.86 nm display an inverse Hall-Petch relationship due to the GB sliding mechanism.A higher strain rate in nB_(4)C often leads to a higher yield strength,following a 2/3 power *** deformation mechanisms are critical for the design of ceramics with superior mechanical properties.

关键词： nanocrystalline boron carbide compression grain boundary sliding amorphization inverse Hall–Petch behavior

Unraveling the efficacy network: A network meta-analysis of adjuvant external beam radiation therapy methods after hepatectomy

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World Journal of Gastrointestinal Surgery 2024年第1期16卷 205-214页

作者： Gao-Yuan Yang Zhi-Wei He Yong-Chang Tang Feng Yuan Ming-Bo Cao Yu-Peng Ren Yu-Xuan Li Xiao-Rui Su Zhi-Cheng Yao mei-hai Deng Department of Hepatobiliary Surgery The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630Guangdong ProvinceChina Department of General Surgery Qilu HospitalShandong UniversityJinan 250012Shandong ProvinceChina Department of General Surgery The First Affiliated HospitalGuangzhou Medical UniversityGuangzhou 511436Guangdong ProvinceChina Department of Hepatobiliary and Pancreatic Surgery The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhou 510630Guangdong ProvinceChina

BACKGROUND Primary liver cancer is a malignant tumor with a high recurrence rate that significantly affects patient *** adjuvant external radiation therapy(RT)has been shown to effectively prevent recurrence after liver cancer ***,there are multiple RT techniques available,and the differ-ential effects of these techniques in preventing postoperative liver cancer re-currence require further *** To assess the advantages and disadvantages of various adjuvant external RT methods after liver resection based on overall survival(OS)and disease-free survival(DFS)and to determine the optimal *** This study involved network meta-analyses and followed the PRISMA *** data of qualified studies published before July 10,2023,were collected from PubMed,Embase,the Web of Science,and the Cochrane *** included relevant studies on postoperative external beam RT after liver resection that had OS and DFS as the primary *** magnitudes of the effects were determined using risk ratios with 95%confidential *** results were analyzed using R software and STATA *** A total of 12 studies,including 1265 patients with hepatocellular carcinoma(HCC)after liver resection,were included in this *** was no significant heterogeneity in the direct paired comparisons,and there were no significant differences in the inclusion or exclusion criteria,intervention measures,or outcome indicators,meeting the assumptions of heterogeneity and *** analysis revealed that patients who underwent stereotactic body radiotherapy(SBRT)after resection had longer OS than those who underwent intensity modulated radiotherapy(IMRT)or 3-dimensional conformal RT(3D-CRT).DFS analysis revealed that patients who underwent 3D-CRT after resection had the longest *** who underwent IMRT after resection had longer OS than those who underwent 3D-CRT and longer DFS than those who underwent ***

关键词： Primary liver cancer Hepatocellular carcinoma Network meta-analysis External beam radiation therapy Stereotactic body radiotherapy Intensity modulated radiotherapy

Association of cardiometabolic multimorbidity with all-cause and cardiovascular disease mortality among Chinese hypertensive patients

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Journal of Geriatric Cardiology 2024年第2期21卷 211-218页

作者： Luo-Xi XIAO Zi-Yu WANG Jiang-Tao LI hai-mei WANG Yi-Ming HAO Pan ZHOU Yu-Lin HUANG Qiu-Ju DENG Yong-Chen HAO Na YANG Li-Zhen HAN Zhao YANG Ping-Ping JIA Yue QI Jing LIU Center for Clinical and Epidemiologic Research Beijing Anzhen HospitalCapital Medical UniversityBeijing Institute of HeartLung and Blood Vessel DiseasesBeijing Municipal Key Laboratory of Clinical EpidemiologyBeijingChina

BACKGROUND Hypertension usually clusters with multiple ***,the association between cardiometabolic multimorbidity(CMM)and mortality in hypertensive patients is *** study aimed to investigate the association between CMM and all-cause and cardiovascular disease(CVD)mortality in Chinese patients with *** The data used in this study were from the China National Survey for Determinants of Detection and Treatment Status of Hypertensive Patients with Multiple Risk Factors(CONSIDER),which comprised 5006 participants aged 19–91 *** was defined as the presence of one or more of the following morbidities:diabetes mellitus,dyslipidemia,chronic kidney disease,coronary heart disease,and *** proportional hazard models were used to calculate the hazard ratios(HR)with 95%CI to determine the association between the number of CMMs and both all-cause and CVD *** Among 5006 participants[mean age:58.6±10.4 years,50%women(2509 participants)],76.4%of participants had at least one *** mortality rate was 4.57,4.76,8.48,and 16.04 deaths per 1000 person-years in hypertensive patients without any comorbidity and with one,two,and three or more morbidities,*** the fully adjusted model,hypertensive participants with two cardiometabolic diseases(HR=1.52,95%CI:1.09–2.13)and those with three or more cardiometabolic diseases(HR=2.44,95%CI:1.71–3.48)had a significantly elevated risk of all-cause *** findings were similar for CVD mortality but with a greater increase in risk *** In this study,three-fourths of hypertensive patients had *** with two or more comorbidities was associated with a significant increase in the risk of all-cause and cardiovascular mortality among hypertensive patients,suggesting more intensive treatment and control in this high-risk patient group.

关键词： hypertensive patients morbidity

后真相生成研究的认识论批评:兼论恢复真相的方法

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陕西师范大学学报（哲学社会科学版） 2024年第5期53卷 118-131页

作者：王贵斌郑海妹陕西师范大学新闻与传播学院陕西西安710119 陕西师范大学马克思主义学院陕西西安710119

对于后真相的分析批评而言,现有研究已经转向后真相现象生成的认识论。恢复人们对真相的信心,已经成为摆在知识分子面前的一道难题。从批评后真相现象生成的认识论看,当前后真相现象研究中有两个关键“遗忘”和两个关键因素的“忽略”,... 详细信息

对于后真相的分析批评而言,现有研究已经转向后真相现象生成的认识论。恢复人们对真相的信心,已经成为摆在知识分子面前的一道难题。从批评后真相现象生成的认识论看,当前后真相现象研究中有两个关键“遗忘”和两个关键因素的“忽略”,从而导致对后真相生成的认识论批评的不彻底。关键“遗忘”指向世界观和方法论,即对后现代,特别是对解构主义知识的遗忘,对后真相“泛化式抽象”的表达方式的遗忘。关键因素“忽略”指向对后真相现象生成中的作用因素:对人类传播活动意义的无限推崇,对经济符号资本控制逻辑的滥用。为此,要破除后真相,恢复真相,应当从多维知识体系出发,以社会治理为手段,重塑自媒体舆论秩序。

关键词：后真相认识论批评社会现象学数字传播环境

Unloading and successful treatment with bioresorbable stents during percutaneous coronary intervention:A case report

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World Journal of Cardiology 2024年第8期16卷 484-490页

作者： Tao Sun Ming-Xue Zhang Yan Zeng Li-Hua Ruan Yi Zhang Cheng-Long Yang Zhang Qin Jing Wang hai-mei Zhu Yun Long Department of Cardiology The First Hospital of Hunan University of Chinese MedicineChangsha 410007Hunan ProvinceChina Teaching and Research Section of Chinese Internal Medicine The First Hospital of Hunan University of Chinese MedicineChangsha 410007Hunan ProvinceChina Department of Pain The First Hospital of Hunan University of Chinese MedicineChangsha 410007Hunan ProvinceChina

BACKGROUND With the development of percutaneous coronary intervention(PCI),the number of interventional procedures without implantation,such as bioresorbable stents(BRS)and drug-coated balloons,has increased *** drug-eluting stent unloading is one of the most common clinical ***,BRS detachment is more concealed and harmful,but has yet to be reported in clinical *** this study,we report a case of BRS unloading and successful *** is a case of a 59-year-old male with the following medical history:“Type 2 diabetes mellitus”for 2 years,maintained with metformin extended-release tablets,1 g PO BID;“hypertension”for 20 years,with long-term use of metoprolol sustained-release tablets,47.5 mg PO QD;“hyperlipidemia”for 20 years,without regular *** was admitted to the emergency department of our hospital due to intermittent chest pain lasting 18 hours,on February 20,2022 at 15:*** results showed sinus rhythm,ST-segment elevation in leads I and avL,and poor R-wave progression in leads V1–***-sensitivity troponin I level was 4.59 ng/mL,indicating an acute high lateral wall myocardial *** patient’s family requested treatment with BRS,without *** PCI,the BRS became unloaded but was successfully *** patient was followed up for 2 years;he had no episodes of angina pectoris and was in generally good *** We describe a case of a 59-year-old male experienced BRS unloading and successful *** analyzing images,the causes of BRS unloading and the treatment plan are discussed to provide insights for BRS release *** discuss preventive measures for BRS unloading.

关键词： Coronary artery diseases Percutaneous coronary intervention Bioresorbable stents Stent unloading Stent release Intravascular ultrasound Case report

B站读书类视频对高校图书馆阅读推广的经验借鉴与启示

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图书馆研究 2024年第5期54卷 13-21页

作者：赖海媚中山大学图书馆广东深圳518107

相比于自媒体读书类视频的推广成效,高校图书馆利用视频平台进行阅读推广仍有巨大的发展空间。自媒体读书类账号的创作经验值得高校图书馆借鉴。通过网络调查法和内容分析法对B站自媒体读书类账号及其发布的视频进行调研,分析视频的内... 详细信息

相比于自媒体读书类视频的推广成效,高校图书馆利用视频平台进行阅读推广仍有巨大的发展空间。自媒体读书类账号的创作经验值得高校图书馆借鉴。通过网络调查法和内容分析法对B站自媒体读书类账号及其发布的视频进行调研,分析视频的内容特征、功能与价值。结果显示,B站读书类视频按内容可划分为图书解读类、话题导向类、人物专题类、学习方法类和“劝读”类,具有重塑阅读与扩大受众、共创阅读与延伸阅读、信息传递与知识传播等功能价值,同时也需警惕读书类视频可能会削弱受众自主阅读和深度思考的能力。基于调研结果,梳理读书类视频对高校图书馆阅读推广的经验借鉴与启示,即积极把握网络视频与阅读服务融合的趋势,基于关联主义搭建可持续的视频阅读资源库,思考与应对视频化阅读带来的负面影响。

关键词：高校图书馆读书类视频阅读推广视频化阅读自媒体

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成人注意缺陷多动障碍的团体辩证行为治疗

中国临床心理学杂志 2024年第4期32卷 928-934页

作者：潘美蓉邱孙伟刘璐李海梅王玉凤钱秋谨北京大学第六医院北京大学精神卫生研究所北京100191 国家卫生健康委员会精神卫生学重点实验室(北京大学) 国家精神心理疾病临床医学研究中心(北京大学第六医院)北京100191

目的:探讨辩证行为治疗(DBT)在国内成人注意缺陷多动障碍(ADHD)中的可行性和初步疗效,并分析疗效预测因素。方法:对20名成人ADHD开展团体DBT,收集参与度及满意度,分析治疗过程中、治疗结束时和结束3个月后随访时的多方面指标变化,并探... 详细信息

目的:探讨辩证行为治疗(DBT)在国内成人注意缺陷多动障碍(ADHD)中的可行性和初步疗效,并分析疗效预测因素。方法:对20名成人ADHD开展团体DBT,收集参与度及满意度,分析治疗过程中、治疗结束时和结束3个月后随访时的多方面指标变化,并探索疗效预测因素。结果:治疗参与率为88.3%,满意度4.3~4.8分(满分5分);通过治疗患者核心症状(g=0.634~1.031)及抑郁情绪(g=0.379~0.664)显著下降,情绪调节(g=0.296~0.616)、觉察能力(g=-0.386~-0.581)及自尊水平(g=-0.305~-0.298)显著提升,并在3个月随访时维持。疗效积极预测因素包括男性、治疗早期起效及基线核心症状得分更高;消极预测因素包括基线执行功能更差及存在共患病。结论:DBT适用于我国成人ADHD,带来多方面改善。疗效预测因素分析为适应证优化提供了理论依据。

关键词：成人注意缺陷多动障碍辩证行为疗法可行性研究预测因素

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漳卫新河四女寺-辛集闸段生态环境现状评价

海河水利 2024年第9期 10-13页

作者：陈海梅中水北方勘测设计研究有限责任公司天津300222

漳卫新河属海河流域漳卫南运河系的泄洪入海通道,属河北省与山东省界河,其生态环境受上游来水、两岸经济发展影响,人工干扰程度较高。以漳卫新河四女寺—辛集闸段为研究对象,采用实地调查、遥感解译等方法对研究河段的陆生生态和水生生... 详细信息

漳卫新河属海河流域漳卫南运河系的泄洪入海通道,属河北省与山东省界河,其生态环境受上游来水、两岸经济发展影响,人工干扰程度较高。以漳卫新河四女寺—辛集闸段为研究对象,采用实地调查、遥感解译等方法对研究河段的陆生生态和水生生态环境进行分析评价,经分析发现研究河段人为干扰程度较高,植物群系类型偏少,植被覆盖度水平整体虽较高但植物群落结构较为简单,应对外界干扰的抵抗力和恢复力均较弱,因生态水量保障程度较低,水生生态环境不稳定,整体处于一般水平。

关键词：生态环境现状评价漳卫新河