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Finite Difference-Peridynamic Differential Operator for Solving Transient Heat Conduction Problems

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Computer Modeling in Engineering & Sciences 2024年第9期140卷 2707-2728页

作者： Chunlei Ruan Cengceng Dong Zeyue Zhang Boyu Chen zhijun liu School of Mathematics&Statistics Henan University of Science&TechnologyLuoyang471023China Longmen Laboratory Luoyang471023China

Transient heat conduction problems widely exist in *** previous work on the peridynamic differential operator(PDDO)method for solving such problems,both time and spatial derivatives were discretized using the PDDO method,resulting in increased complexity and programming *** this work,the forward difference formula,the backward difference formula,and the centered difference formula are used to discretize the time derivative,while the PDDO method is used to discretize the spatial *** new schemes for solving transient heat conduction equations have been developed,namely,the forward-in-time and PDDO in space(FT-PDDO)scheme,the backward-in-time and PDDO in space(BT-PDDO)scheme,and the central-in-time and PDDO in space(CT-PDDO)*** stability and convergence of these schemes are analyzed using the Fourier method and Taylor’s *** show that the FT-PDDO scheme is conditionally stable,whereas the BT-PDDO and CT-PDDO schemes are unconditionally *** stability conditions for the FT-PDDO scheme are less stringent than those of the explicit finite element method and explicit finite difference *** convergence rate in space for these three methods is *** constructed schemes are applied to solve one-dimensional and two-dimensional transient heat conduction *** accuracy and validity of the schemes are verified by comparison with analytical solutions.

关键词： Peridynamic differential operator finite difference method stability transient heat conduction problem

Euler’s First-Order Explicit Method–Peridynamic Differential Operator for Solving Population Balance Equations of the Crystallization Process

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Computer Modeling in Engineering & Sciences 2024年第3期138卷 3033-3049页

作者： Chunlei Ruan Cengceng Dong Kunfeng Liang zhijun liu Xinru Bao Mathematics&Statistics School Henan University of Science&TechnologyLuoyang471023China Longmen Laboratory Luoyang471023China College of Vehicle and Traffic Engineering Henan University of Science&TechnologyLuoyang471023China

Using Euler’s first-order explicit(EE)method and the peridynamic differential operator(PDDO)to discretize the time and internal crystal-size derivatives,respectively,the Euler’s first-order explicit method–peridynamic differential operator(EE–PDDO)was obtained for solving the one-dimensional population balance equation in *** different conditions during crystallization were studied:size-independent growth,sizedependent growth in a batch process,nucleation and size-independent growth,and nucleation and size-dependent growth in a continuous *** high accuracy of the EE–PDDO method was confirmed by comparing it with the numerical results obtained using the second-order upwind and HR-van *** method is characterized by non-oscillation and high accuracy,especially in the discontinuous and sharp crystal size *** stability of the EE–PDDO method,choice of weight function in the PDDO method,and optimal time step are also discussed.

关键词： Population balance equation crystallization peridynamic differential operator Euler’s first-order explicit method

Considerable impact of major air pollutants on hypertension in Guizhou province,southwest China

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Chinese Medical Journal 2024年第4期137卷 496-498页

作者： Ping Yuan Guojia Qi Xiu Dai Xiangyuan Chu zhijun liu Guoqin liu Xiuquan Shi Department of Epidemiology and Health Statistics School of Public HealthZunyi Medical UniversityZunyiGuizhou 563006China School of Management Zunyi Medical UniversityZunyiGuizhou 563006China Center for Injury Research and Policy&Center for Pediatric Trauma Research The Research Institute at Nationwide Children’s HospitalThe Ohio State University College of MedicineColumbusOH 43210USA

To the Editor:Air pollution can lead to respiratory and cardiovascular diseases(CVDs),and its impact on human health is very *** particles less than 0.1µm can pass through the blood brain barrier,reach the brain,and enter the central nervous system,causing physiological and pathological changes.A study shows that long-term exposure to fine particulate matter(PM_(2.5))will increase the risk of CVDs among Chinese residents.^([1])Another study found that a short time exposure to low concentrations of air pollutants may also lead to the onset of acute coronary syndrome within one hour.^([2])A meta-analysis based on seven databases showed that environmental air pollution was positively correlated with elevated blood pressure and hypertension.^([3])Mounting evidence indicates that air pollution can cause cardiovascular and cerebrovascular diseases and affect human health furtherly.

关键词： pollution impact Guizhou

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基于多核心节点的增量式动态社区发现算法

通信学报 2024年第3期45卷 66-80页

作者：陈晶刘志君杨新宇刘洺辛刘苗苗广东海洋大学数学与计算机学院广东湛江524088 燕山大学信息科学与工程学院计算机系河北秦皇岛066004 河北省虚拟技术与系统集成重点实验室河北秦皇岛066004 广东海洋大学电子信息工程学院广东湛江524088 东北石油大学计算机与信息技术学院黑龙江大庆163318

针对动态社区发现算法通常基于社区结构平稳变化的假设,而难以应对演化过程中可能出现的大量社区消亡或涌现等突发事件的问题,提出了一种基于多核心节点的增量式动态社区发现算法MCNIDCD。首先,将核心节点分为扩散型和内聚型,制定4种增... 详细信息

针对动态社区发现算法通常基于社区结构平稳变化的假设,而难以应对演化过程中可能出现的大量社区消亡或涌现等突发事件的问题,提出了一种基于多核心节点的增量式动态社区发现算法MCNIDCD。首先,将核心节点分为扩散型和内聚型,制定4种增量更新策略。其次,通过局部更新调整节点社区归属,并采用增量模块度方法优化社区结构。最后,实现社区合并。在人工和真实网络上对该算法的性能进行了评估,实验结果表明,在对比目前相关动态社区检测算法时,在人工网络仿真环境中,MCNIDCD算法表现出与社区演化规律的高度契合性;在真实网络实验中,MCNIDCD算法在模块度性能指标上平均提升了28%,并且在稳定性方面具有良好的优势,其优势对于研究动态社区演化过程具有重要的意义。

关键词：核心节点增量式网络演化社区发现

高质量课程评价的逻辑起点、内涵特征与培育路径

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课程．教材．教法 2024年第6期44卷 13-18页

作者：徐彬刘志军河南大学教育学部开封475004 河南大学教育考试与评价研究院开封475004

育人性、发展性、问题性,是认识与开展高质量课程评价的逻辑起点和初始动因。基于这一前提,可将高质量课程评价理解为一种将高质量的发展理念和根本要求融入课程评价的任何要素与环节之中,使其从整体上成为一种系统完备、科学规范和运... 详细信息

育人性、发展性、问题性,是认识与开展高质量课程评价的逻辑起点和初始动因。基于这一前提,可将高质量课程评价理解为一种将高质量的发展理念和根本要求融入课程评价的任何要素与环节之中,使其从整体上成为一种系统完备、科学规范和运行有效的课程评价样态。开展和培育高质量课程评价,是应对课程评价难题和实现课程评价育人的重要途径。为此,需要加强课程评价的理论、实践与政策研究,增强课程评价的创新意识、问题意识和技术意识,重视课程评价的理念、价值和思维功用。

关键词：高质量课程评价学生发展评价育人

Tildrakizumab for moderate-to-severe plaque psoriasis in Chinese patients:A 12-week randomized placebo-controlled phase III trial with long-term extension

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Chinese Medical Journal 2024年第10期137卷 1190-1198页

作者： Chen Yu Songmei Geng Bin Yang Yunhua Deng Fuqiu Li Xiaojing Kang Mingye Bi Furen Zhang Yi Zhao Weili Pan Zhongwei Tian Jinhua Xu Zhenghua Zhang Nan Yu Xinsuo Duan Shuping Guo Qing Sun Weiquan Li Juan Tao zhijun liu Yuanyuan Yin Gang Wang Department of Dermatology Xijing HospitalThe Fourth Military Medical UniversityXi’anShaanxi 710032China Department of Dermatology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi 710004China Department of Dermatology Dermatology Hospital of Southern Medical UniversityGuangzhouGuangdong 510091China Department of Dermatology Tongji HospitalHuazhong University of Science and TechnologyWuhanHubei 430030China Department of Dermatology The Second Hospital of Jilin UniversityChangchunJilin 130041China Department of Dermatology People’s Hospital of Xinjiang Uygur Autonomous RegionUrumqiXinjiang 830001China Department of Dermatology Wuxi People’s Hospital of Wuxi CityWuxiJiangsu 214023China Department of Dermatology Shandong Provincial Hospital for Skin Diseases&Shandong Provincial Institute of Dermatology and VenereologyShandong First Medical University&Shandong Academy of Medical SciencesJinanShandong 250022China Department of Dermatology Beijing Tsinghua Changgung HospitalBeijing 102218China Department of Dermatology Zhejiang Provincial People’s HospitalHangzhouZhejiang 310014China Department of Dermatology The First Affiliated Hospital of Xinxiang Medical CollegeXinxiangHenan 453100China Department of Dermatology Huashan Hospital Affiliated to Fudan UniversityShanghai 200040China Department of Dermatology General Hospital of Ningxia Medical UniversityYinchuanNingxia 750000China Department of Dermatology Affiliated Hospital of Chengde Medical UniversityChengdeHebei 067000China Department of Dermatology The First Hospital of Shanxi Medical UniversityTaiyuanShanxi 030001China Department of Dermatology Qilu Hospital of Shandong UniversityJinanShandong 250012China Department of Dermatology Yuebei People’s HospitalShaoguanGuangdong 512026China Department of Dermatology Union Hospital Tongji Medical Collage Huazhong University of Science and TechnologyWuhanHubei 430022China Department of Dermatology and Venereal Diseases The First Affiliated Hospit

Background:There is a need for effective and safe therapies for psoriasis that provide sustained *** aim of this study was to assess the efficacy and safety of tildrakizumab,an anti-interleukin-23p19 monoclonal antibody,for treating moderate-to-severe plaque psoriasis in Chinese ***:In this multi-center,double-blind,phase III trial,patients with moderate-to-severe plaque psoriasis were enrolled and randomly assigned(1:1)to receive subcutaneous tildrakizumab 100 mg or placebo at weeks 0 and *** initially assigned to placebo were switched to receive tildrakizumab at weeks 12,16,and every 12 weeks *** in the tildrakizumab group continued with tildrakizumab at week 16,and every 12 weeks until week *** primary endpoint was the Psoriasis Area and Severity Index(PASI 75)response rate at week ***:At week 12,tildrakizumab demonstrated significantly higher PASI 75 response rates(66.4%[73/110]vs.12.7%[14/110];difference,51.4%[95%confidence interval(CI),40.72,62.13];P<0.001)and Physician’s Global Assessment(60.9%[67/110]vs.10.0%[11/110];difference,49.1%[95%CI,38.64,59.62];P<0.001)compared to *** 75 response continued to improve over time in both tildrakizumab and placebo-switching to tildrakizumab groups,reaching maximal efficacy after 28 weeks(86.8%[92/106]vs.82.4%[89/108])and maintained up to 52 weeks(91.3%[95/104]vs.87.4%[90/103]).Most treatment-emergent adverse events were mild and not related to ***:Tildrakizumab demonstrated durable efficacy through week 52 and was well tolerated in Chinese patients with moderate-to-severe plaque *** registration:***,NCT05108766.

关键词： Tildrakizumab Interleukin 23 Plaque psoriasis Chinese Randomized controlled trial

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溯源与正本:关于“过程性评价”的再认识

教育发展研究 2024年第12期44卷 43-53页

作者：张红霞刘志军河南大学教育考试与评价研究院开封475004

文章基于对“过程性评价”在政策术语与学术术语语境下的考察,揭示了过程性评价的“全过程论”“单一过程论”“双重过程论”,以及过程性评价和形成性评价的“替代说”“混同说”“差异说”等认识问题。通过对过程性评价及其相关概念的... 详细信息

文章基于对“过程性评价”在政策术语与学术术语语境下的考察,揭示了过程性评价的“全过程论”“单一过程论”“双重过程论”,以及过程性评价和形成性评价的“替代说”“混同说”“差异说”等认识问题。通过对过程性评价及其相关概念的溯源考察,历经滥觞、转向、消弭、融合等发展阶段,研究认为,过程性评价中的“过程”是一种相对时间意义上的理解,过程性评价和形成性评价虽然具有天然的联系性,但两者本质上是时间意义和价值意义上的区别,而过程性评价和结果性评价看似有着明显的区别,但两者在作用指向上具有高度联系性,可以在形成性评价或总结性评价中实现相依交融。最后,过程性评价在实践中的践行要略包括:准确把握评价价值定位,重点聚焦典型行为表现,持续完善反思性自我评价机制,技术赋能实现精准改进。

关键词：过程性评价形成性评价结果性评价总结性评价

新课标背景下的跨学科学习:现实阻滞与纾解路径

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教育研究与实验 2024年第2期 73-81页

作者：刘志军陈雪纯河南大学教育学部开封475004 河南大学教育考试与评价研究院

跨学科学习是《义务教育课程方案和课程标准(2022年版)》中的一大亮点,但并非课程改革历程中的新事物,它所蕴含的跨学科知识统整思维在以往课标的改革举措中已有所体现。在新课标背景下,核心素养育人目标及理念的明确,赋予了跨学科学习... 详细信息

跨学科学习是《义务教育课程方案和课程标准(2022年版)》中的一大亮点,但并非课程改革历程中的新事物,它所蕴含的跨学科知识统整思维在以往课标的改革举措中已有所体现。在新课标背景下,核心素养育人目标及理念的明确,赋予了跨学科学习实践更丰富、更深刻的内涵及价值。作为核心素养导向下学习方式变革的创新实践,跨学科学习真正落地需以课程、教学及评价的整体性变革为牵引。当前实践中跨学科学习面临着课程结构学科化、教学设计还原化以及评价生态功利化等困境,其综合性、实践性、发展性价值难以充分发挥。为推动核心素养导向下跨学科学习实践落地,需要形成核心素养为目标的主题式课程结构,展开深度学习为基准的大概念项目式教学设计,实施素养发展为导向的表现性学习评价,以及建设多元支持协同的保障机制。

关键词：跨学科学习新课程标准核心素养深度学习

甲烷固体氧化物燃料电池的多物理场耦合积碳模型

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洁净煤技术 2024年第5期30卷 144-154页

作者：肖瑶刘志军魏炜许晓飞刘凤霞大连理工大学化工学院流体与粉体工程研究设计所辽宁大连116024

烃类燃料的直接使用造成固体氧化物燃料电池(SOFC)阳极积碳并导致性能下降的严峻问题,开展积碳原因分析并采取减少积碳形成的措施是加快固体氧化物燃料电池商业化的重要课题。提出三维瞬态多物理场耦合积碳模型,通过仿真模型计算,研究... 详细信息

烃类燃料的直接使用造成固体氧化物燃料电池(SOFC)阳极积碳并导致性能下降的严峻问题,开展积碳原因分析并采取减少积碳形成的措施是加快固体氧化物燃料电池商业化的重要课题。提出三维瞬态多物理场耦合积碳模型,通过仿真模型计算,研究不同条件、不同参数对固体氧化物燃料电池性能的影响,以评估电池的长期性能。在电池工作电压和积碳速率方面,计算结果与已有试验结果吻合较好。结果表明,随着积碳含量增加,阳极电极材料的孔隙率将减小,催化剂活性降低。当预重整程度降低、入口速度增加、操作温度增加、工作电压下降和燃料中氢气比例增大,积碳量均呈上升趋势。通常来说,积碳的增加会造成电池性能下降,如预重整程度的降低及入口速度的增加符合这一趋势。操作温度增加、工作电压下降和燃料中氢气比例增加虽然也会造成积碳量增加、电性能衰减严重,但电池性能呈上升趋势。研究表明,这一现象与甲烷裂解反应关系密切。

关键词：固体氧化物燃料电池积碳孔隙率数值模拟

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