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GB/T41972—2022《铸铁件铸造缺陷分类及命名》国家标准解读

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铸造 2024年第3期73卷 428-436页

作者：丛建臣孙军丛红日冯梅珍郭二军王丽萍山东理工大学山东淄博255000 天润工业技术股份有限公司山东威海264400 哈尔滨理工大学黑龙江哈尔滨150006

介绍标准的制定过程和主要内容、与ISO/TR16078:2013标准的主要技术差异和标准的应用。结合铸造的实际生产过程,删除了部分非铸铁件出现的缺陷、不确定的缺陷或与其他内容重复的缺陷以及热处理缺陷,增加了部分生产中常见但标准中未能提... 详细信息

介绍标准的制定过程和主要内容、与ISO/TR16078:2013标准的主要技术差异和标准的应用。结合铸造的实际生产过程,删除了部分非铸铁件出现的缺陷、不确定的缺陷或与其他内容重复的缺陷以及热处理缺陷,增加了部分生产中常见但标准中未能提及的缺陷,使其具有科学性和实用性。

关键词：铸铁件铸造缺陷国家标准解读

激光去腐对儿童疼痛程度和焦虑影响的meta分析

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临床口腔医学杂志 2024年第8期40卷 488-492页

作者：王梦琪张蓓王丽萍孙新新王琪刘佳新疆医科大学第一附属医院(附属口腔医院)儿童口腔科新疆乌鲁木齐830054

目的:系统评价激光去腐对儿童疼痛程度和焦虑水平的影响。方法:计算机检索中国知网、维普数据库、中国生物医学文献数据库、Web of Science、万方数据库、The Cochrane library、PubMed、Embase,搜索有关儿童激光去龋的随机对照试验(RCT... 详细信息

目的:系统评价激光去腐对儿童疼痛程度和焦虑水平的影响。方法:计算机检索中国知网、维普数据库、中国生物医学文献数据库、Web of Science、万方数据库、The Cochrane library、PubMed、Embase,搜索有关儿童激光去龋的随机对照试验(RCT)。检索时限是建立数据库至2024年1月。由两名研究者独立筛选文献、质量评估和提取资料,最终分析用Stata 15.0和RevMan 5.3软件进行。结果:最终纳入8项研究,4篇为RCT,4篇为自身对照研究,共399名患者,538颗患牙。Meta分析结果显示:激光去腐可降低患儿的疼痛程度(Z=5.33,P<0.05),患儿认为激光去腐更舒适(Z=2.06,P<0.05),患儿再下一次治疗时更愿意选择激光治疗(Z=7.16,P<0.05)。结论:现有证据显示,激光去腐可以降低患儿疼痛程度和焦虑,且患儿对激光治疗的反应好,但受纳入研究数量限制,上述结论尚待更多研究予以验证。

关键词：激光去腐疼痛焦虑 Meta分析

Evaluation of Colloidal Gold Immunochromatography for the Diagnosis of Human Brucellosis Caused by Smooth Brucella

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Biomedical and Environmental Sciences 2022年第8期35卷 764-767页

作者： DONG Shuai Bing TA Na wang li ping FAN Meng Guang li Yue Xi ZHANG Cui Hong ZHANG li Jie wang Zi Jun JIANG Hai Bejing Center for Disease Prevention and Control Bejing 100013China Inner Mongolia Autonomous Region Comprehensive Center for Disease Control and Prevention Hohhot 010031Inner Mongolia AutonomousChina Chinese Center for Disease Control and Prevention Beijing 102206China Wulanchabu City Center for Endemic Disease Prevention and Control Wulanchabu 012000Inner Mongolia AutonomousChina State Key Laboratory for Infectious Disease Prevention and Control Collaborative Innovation Center for Diagnosis and Treatment of Infectious DiseasesNational Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBejing 102206China

Brucellosis is an infectious allergic zoonotic disease caused by bacterial species in the genus Brucella. It is a Class B infectious disease according to the Law on the Prevention and Control of Infectious Diseases in China. According to the World Health Organization, brucellosis is currently a highly neglected zoonotic disease. Despite this, more than 170 countries have reported cases of brucellosis, and approximately 500,000 new cases are reported each year.

关键词： allergic cases neglected

Rheological Behaviors of Polymers with Nanoparticles Tethered at Each End

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Chinese Journal of Polymer Science 2024年第3期42卷 400-406,I0009页

作者： Song-Qi Zhang Wen-Qing wang Jia-ping lin li-Quan wang Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

The polymer with nanoparticles tethered at each end is a unique model for unraveling the effect of chain ends on the polymer dynamics. We investigated the rheological behavior of this kind of polymer by using nonequilibrium molecular dynamics simulation. The effect of polymer lengths and nanoparticle radii on the complex moduli and viscosity was examined. The dependence of complex moduli on the frequency becomes less pronounced as the polymer is short or the nanoparticle is large. The shear thinning behavior was revealed for these systems, and the scaling exponent of complex viscosity with respect to the frequency was found to change from-1/2 to-3/4 as the polymer shortens or the nanoparticle enlarges. The rheological behavior was further explained by analyzing the mean square distance of nanoparticles. The simulation results were compared with the existing experimental finding, showing an agreement. The work provides information for understanding the chain end effect on polymer rheology.

关键词： Polymer rheology Modulus Viscosity Molecular dynamics

Constructing long-cycling crystalline C_(3)N_(4)-based carbonaceous anodes for sodium-ion battery via N configuration control

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Carbon Energy 2024年第1期6卷 159-171页

作者： Ying wang Hongguan li Shuanlong Di Boyin Zhai ping Niu Antonios Kelarakis Shulan wang li li School of Metallurgy Northeastern UniversityShenyangLiaoningChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyangLiaoningChina Department of Chemistry College of ScienceNortheastern UniversityShenyangLiaoningChina School of Natural Sciences UCLan Research Centre for Smart MaterialsUniversity of Central LancashirePrestonUK Foshan Graduate School of Innovation Northeastern UniversityFoshanGuangdongChina

Carbon nitrides with two-dimensional layered structures and high theoretical capacities are attractive as anode materials for sodium-ion batteries while their low crystallinity and insufficient structural stability strongly restrict their practical *** carbon nitrides with conductive carbon may relieve these ***,little is known about the influence of nitrogen(N)configurations on the interactions between carbon and C_(3)N_(4),which is fundamentally critical for guiding the precise design of advanced C_(3)N_(4)-related ***,highly crystalline C_(3)N_(4)(poly(triazine imide),PTI)based all-carbon composites were developed by molten salt *** importantly,the vital role of pyrrolic-N for enhancing charge transfer and boosting Na+storage of C_(3)N_(4)-based composites,which was confirmed by both theoretical and experimental evidence,was spot-highlighted for the first *** elaborately controlling the salt composition,the composite with high pyrrolic-N and minimized graphitic-N content was *** from the formation of highly crystalline PTI and electrochemically favorable pyrrolic-N configurations,the composite delivered an unusual reverse growth and record-level cycling stability even after 5000 cycles along with high reversible capacity and outstanding full-cell capacity *** work broadens the energy storage applications of C_(3)N_(4) and provides new prospects for the design of advanced all-carbon electrodes.

关键词： anode highly crystalline C_(3)N_(4) N configuration sodium-ion batteries ultra-long cyclic stability

Bi_(2)S_(3) nanofiber bunch for highly efficient CO_(2) electroreduction to formate at low overpotential

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Rare Metals 2024年第7期43卷 3391-3399页

作者： li wang Wen-Ke Gui Shan Jiang liang wang Jian-ping Yang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Centre for Catalysis and Clean Energy Griffith UniversityGold Coast CampusGold CoastQLD 4222Australia

Electrochemical conversion of CO_(2) into valuable chemicals represents a promising strategy to alleviate the environmental issues caused by excessive CO_(2) levels in the *** this work,Bi_(2)S_(3) with different morphologies have been fabricated via facile hydrothermal method to investigate the CO_(2) electrochemical reduction process.

关键词： process. facile Electrochemical

Rapid prediction of damaged ship roll motion responses in beam waves based on stacking algorithm

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Journal of Hydrodynamics 2024年第2期36卷 394-405页

作者： Xin-ran liu Ting-qiu li Zi-ping wang School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan430063China

Accurate modeling for highly non-linear coupling of a damaged ship with liquid sloshing in waves is still of considerable interest within the computational fluid dynamics(CFD)and AI *** paper describes a data-driven Stacking algorithm for fast prediction of roll motion response amplitudes in beam waves by constructing a hydrodynamics model of a damaged ship based on the dynamic overlapping grid CFD *** general idea is to optimize various parameters varying with four types of classical base models like multi-layer perception,support vector regression,random forest,and hist gradient boosting *** offers several attractive properties in terms of accuracy and efficiency by choosing the standard DTMB 5415 model with double damaged compartments for *** is clearly demonstrated that the predicted response amplitude operator(RAO)in the regular beam waves agrees well with the experimental data available,which verifies the accuracy of the established damaged ship hydrodynamics *** high-quality CFD samples,therefore,implementation of the designed Stacking algorithm with its optimal combination can predict the damaged ship roll motion amplitudes effectively and accurately(e.g.,the coefficient of determination 0.9926,the average absolute error 0.0955 and CPU 3s),by comparison of four types of typical base models and their various ***,the established Stacking algorithm provides one potential that can break through problems involving the time-consuming and low efficiency for large-scale lengthy CFD simulations.

关键词： Ship motion damaged ship computational fluid dynamics(CFD) machine learning stacking algorithm

预见性护理管理结合凯格尔运动在宫颈癌术后膀胱功能恢复中的应用

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四川解剖学杂志 2024年第3期32卷 73-75页

作者：王平利肖静静刘静茹郑州大学第一附属医院妇科郑州450052

目的:探讨预见性护理管理结合凯格尔运动在宫颈癌术后膀胱功能恢复中的应用.方法:选取2021年8月至2023年8月期间本院收治的122例宫颈癌患者作为研究对象,根据围手术期护理方案将其分为观察组(n=62,给予预见性护理管理结合凯格尔运动护理... 详细信息

目的:探讨预见性护理管理结合凯格尔运动在宫颈癌术后膀胱功能恢复中的应用.方法:选取2021年8月至2023年8月期间本院收治的122例宫颈癌患者作为研究对象,根据围手术期护理方案将其分为观察组(n=62,给予预见性护理管理结合凯格尔运动护理)和对照组(n=60,给予常规护理).比较两组患者膀胱功能、心理状态及生活质量,并统计两组护理满意度.结果:干预后,观察组患者留置导尿时间短于对照组,拔管后尿残余量少于对照组,尿潴留发生率显著低于对照组,差异均有统计学意义(P<0.05).观察组患者焦虑自评量表(SAS)、抑郁自评量表(SDS)评分下降幅度大于对照组,癌症患者生命质量测定量表(FACT)评分上升幅度大于对照组,差异均有统计学意义(P<0.05).观察组患者护理满意度(100%,62/62)显著高于对照组(93.33%,56/62),差异有统计学意义(P<0.05).结论:预见性护理管理结合凯格尔运动可更好的优化宫颈癌患者术后膀胱功能,降低膀胱功能障碍风险,改善患者心理状态及生活质量,提高患者满意度.

关键词：预见性护理凯格尔运动宫颈癌膀胱功能障碍应用效果

Tensile strength behavior of cement-stabilized dredged sediment reinforced by polypropylene fiber

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Frontiers of Structural and Civil Engineering 2024年第3期18卷 380-392页

作者： Lei LANG Jiangshan li Xin CHEN lijun HAN ping wang State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicChinese Academy of SciencesWuhan 430071China Hubei Provincial Key Laboratory of Contaminated Sludge and Soil Science and Engineering Wuhan 430071China University of Chinese Academy of Sciences Beijing 100049China

This study evaluated the feasibility of using polypropylene fiber(PF)as reinforcement in improving tensile strength behavior of cement-stabilized dredged sediment(CDS).The effects of cement content,water content,PF content and length on the tensile strength and stress–strain behavioral evolutions were evaluated by conducting splitting tensile strength ***,the micro-mechanisms characterizing the tensile strength behavior inside PF-reinforced CDS(CPFDS)were clarified via analyzing macro failure and microstructure *** results indicate that the highest tensile strengths of 7,28,60,and 90 d CPFDS were reached at PF contents of 0.6%,1.0%,1.0%,and 1.0%,exhibiting values 5.96%,65.16%,34.10%,and 35.83%higher than those of CDS,***,3 mm,PF of showed the best reinforcement *** CPFDS exhibited obvious tensile strain-hardening characteristic,and also had better ductility than *** mix factor(C_(C)^(a)/C_(w)^(b))and time parameter(q_(t0)(t))of CDS,and the reinforcement index(k_(t-PF))of CPFDS were used to establish the tensile strength prediction models of CDS and CPFDS,considering multiple *** PF“bridge effect”and associated cementation-reinforcement coupling actions inside CPFDS were mainly responsible for tensile strength behavior *** key findings contribute to the use of CPFDS as recycled engineering soils.

关键词： dredged sediment chemical stabilization fiber reinforcement splitting tensile strength micro-mechanisms