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PC工法桩刚度折减效应数值模拟分析
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作者 陈翔逸 王艳华 +2 位作者 周德泉 王创业 胡汉卿 《中外公路》 2026年第1期30-36,共7页
为研究PC工法桩抗弯刚度的折减效应机理,采用Abaqus软件建立考虑锁扣间相互作用的数值分析有限元模型,对比分析了锁扣摩擦因数、桩顶约束条件和组合方式等因素对PC工法桩抗弯刚度变化规律的影响,并通过理论推导分析了中性轴变化对PC工... 为研究PC工法桩抗弯刚度的折减效应机理,采用Abaqus软件建立考虑锁扣间相互作用的数值分析有限元模型,对比分析了锁扣摩擦因数、桩顶约束条件和组合方式等因素对PC工法桩抗弯刚度变化规律的影响,并通过理论推导分析了中性轴变化对PC工法桩刚度的影响。结果表明:增加锁扣间摩擦力可有效抑制PC工法桩的抗弯刚度折减效应,当锁扣完全焊接时,PC工法桩刚度折减系数可提高至0.83;设置桩顶横向支撑可以显著降低桩身侧移,从而减弱刚度折减效应;PC工法桩抗弯刚度随钢管桩间插入的钢板桩数量增多而降低,刚度折减系数也减小。工程应用中,建议将钢板桩对向排列、将锁扣焊接、设置横向支撑,并采用1根钢管桩匹配1根钢板桩或仅匹配C9型、C-T型、L-T型锁扣,在满足挡土隔水需求的同时,确保基坑安全。 展开更多
关键词 基坑工程 pc工法桩 刚度折减效应 数值模拟
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基于有限元分析的PCA-LSTM模型预测PC梁桥长期性能
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作者 武东超 葛飞 +3 位作者 方圆 闫鑫 任雪枫 仝腾 《现代交通与冶金材料》 2026年第1期28-41,共14页
为准确且高效预测大跨(Prestressed Concrete, PC)桥梁的长期行为,提出一种结合长短期记忆(Long Short-Term Memory, LSTM)神经网络与主成分分析(Principal Component Analysis,PCA)的代理模型。在桥梁有限元(Finite Element Analysis, ... 为准确且高效预测大跨(Prestressed Concrete, PC)桥梁的长期行为,提出一种结合长短期记忆(Long Short-Term Memory, LSTM)神经网络与主成分分析(Principal Component Analysis,PCA)的代理模型。在桥梁有限元(Finite Element Analysis, FEA)模型中引入非线性徐变和混凝土开裂本构,准确模拟实桥持续下挠及开裂的长期行为。通过拉丁超立方抽样(Latin Hypercube Sampling, LHS)对5个研究变量(徐变系数,收缩系数,混凝土强度,预应力水平,环境湿度)进行抽样。从有限元分析结果中提取跨中挠度、预应力损失、开裂并构建数据库,并利用PCA技术将数据进行降维处理。引入LSTM神经网络,并使用定制的损失函数,有效预测不同变量下桥梁的长期行为。通过实桥分析,验证了所提PCA-LSTM代理模型在预测PC桥梁长期行为的准确性及鲁棒性。 展开更多
关键词 大跨度pc桥梁 长期行为 代理模型 主成分分析 长短期记忆网络
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考虑转角-曲率弯矩面积法的大悬臂PC梁简化分析方法
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作者 贾瑞华 胡志坚 +1 位作者 安艳娜 邱博超 《交通科技与经济》 2026年第1期55-61,共7页
为建立大悬臂预制(PC)梁悬臂端部挠度与悬臂根部应力之间的对应关系,根据大悬臂PC梁的变形特点,基于曲率弯矩面积法建立大悬臂PC梁的应力-弯矩-结构挠度内在关系,推导相应的简化挠度计算公式,并通过数值仿真及工程实例对简化挠度计算公... 为建立大悬臂预制(PC)梁悬臂端部挠度与悬臂根部应力之间的对应关系,根据大悬臂PC梁的变形特点,基于曲率弯矩面积法建立大悬臂PC梁的应力-弯矩-结构挠度内在关系,推导相应的简化挠度计算公式,并通过数值仿真及工程实例对简化挠度计算公式的有效性进行验证。结果表明:对于大悬臂PC梁,预应力束的竖弯布置与多集中荷载的施加会使得应力的纵向分布呈现明显分段特点,但挠度仍保持连续。相较传统计算方法,简化挠度计算方法能更为快捷有效地计算大悬臂PC梁荷载作用下的挠度分布规律,充分反映结构变形与受力之间的对应关系。通过工程实测位移值及有限元模型应力值对比,简化挠度计算方法所得理论计算值误差均在4%左右,在施工中能够直观反映结构受力状态。 展开更多
关键词 桥梁工程 大悬臂pc 曲率弯矩面积法 挠度监控 受力状态
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PCS系统在国外原油长距离输送管道中的应用
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作者 何志权 《油气田地面工程》 2026年第1期9-16,共8页
随着全球油气行业的发展,长输管道自动化控制需求不断提升,SCADA系统在保障管道安全高效运行中发挥着关键作用。目前国内长输油气管道控制系统多依赖进口,存在核心技术受制于人的问题,影响能源安全。PCS系统作为我国自主研发的先进SCAD... 随着全球油气行业的发展,长输管道自动化控制需求不断提升,SCADA系统在保障管道安全高效运行中发挥着关键作用。目前国内长输油气管道控制系统多依赖进口,存在核心技术受制于人的问题,影响能源安全。PCS系统作为我国自主研发的先进SCADA系统,已在国内油气管道自动化领域广泛应用,为验证其国际适用性,以NB原油输送管道项目为实例,对比传统SCADA系统,PCS系统在数据处理速度、系统稳定性和报警响应等方面优势明显,能快速采集分析海量实时数据,凭借冗余设计抵御复杂工况干扰,精准捕捉设备异常与管道隐患。同时,该系统可提升管道运行效率,降低故障发生率与运营成本,延长管道使用寿命,带来显著经济效益。该研究成果验证了PCS系统在国外长输原油管道应用的可行性与可靠性,为国产工控软件的国际推广提供了实际参考。 展开更多
关键词 pcS系统 SCADA 原油输送管道 自动化控制
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基于ISM-MICMAC的材料价格波动对PC构件供应链韧性关键影响因素研究
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作者 朱颜 祝连波 +2 位作者 林陵娜 王煜庭 秦徐曼 《物流科技》 2026年第1期86-92,共7页
随着建筑行业对PC构件需求攀升,材料价格波动引发的供应链风险加剧,深刻影响着PC构件供应链的稳定运行。而探究其韧性关键影响因素,已成为抵御供应链中断风险及提高供应链韧性的核心环节。文章采用文献分析法,识别出21项与材料价格波动... 随着建筑行业对PC构件需求攀升,材料价格波动引发的供应链风险加剧,深刻影响着PC构件供应链的稳定运行。而探究其韧性关键影响因素,已成为抵御供应链中断风险及提高供应链韧性的核心环节。文章采用文献分析法,识别出21项与材料价格波动影响PC构件供应链韧性相关的因素。在此基础上,运用解释结构模型(Interpretative structural modeling)对影响因素进行层级划分,明确了影响PC构件供应链的直接因素、中间层因素与深层根本因素。再通过交叉影响矩阵相乘法(Cross-impact matrix multiplication applied to classification)分析各因素间的依赖关系与驱动力,最终确定4项关键影响因素,为增强PC构件供应链节点企业的抗风险能力与整体韧性提供了理论依据。 展开更多
关键词 pc构件 供应链韧性 材料价格波动 ISM-MICMAC
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基于嵌入式ARM的装配式地铁车站异形PC构件生产线自动控制
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作者 高杰 《自动化应用》 2026年第1期11-14,18,共5页
装配式地铁车站异形预制混凝土(PC)构件生产线自动控制中,主要采用PI控制算法进行自动化设计,但易受控制任务负载模糊性的影响,导致综合效率(OEE)指标不佳,因此,提出一种基于嵌入式ARM的装配式地铁车站异形PC构件生产线自动控制方法。首... 装配式地铁车站异形预制混凝土(PC)构件生产线自动控制中,主要采用PI控制算法进行自动化设计,但易受控制任务负载模糊性的影响,导致综合效率(OEE)指标不佳,因此,提出一种基于嵌入式ARM的装配式地铁车站异形PC构件生产线自动控制方法。首先,利用智能体(Agent)分析异形PC构件生产状态,消除隶属度关系,进行直接协商,得到一体化调度结构。其次,认领子设备分配任务,对相互协作Agent进行自主规划,生成信息交换资讯库。然后,构建生产线自动控制Agent模型,将嵌入式ARM核心控制器作为基础,生成浮点运算单元(FPU)。最后,切换控制指令,预设自动控制均衡系数,设计异形PC构件生产线自动控制算法,完成装配式地铁车站异形PC构件生产线的自动控制。实验结果表明,所提方法在不同时间下的OEE指标均较高,满足标准阈值要求,具有经济性。 展开更多
关键词 嵌入式ARM 装配式地铁车站 异形pc构件
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Preoperative anxiety among patients and its correlation with their personality type and pain:A cross-sectional study
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作者 Nariman Salem Abdul Hadi Moursel +10 位作者 Ali Zahweh Dana Shhadi Fedaa Saad Mahdi Reda Mariam Mghames Rami Roumieh Rawan Tfaily Salim M Ramadan Bahaa Bou Dargham Omar Rajab Fatima Akel 《World Journal of Psychiatry》 2026年第1期278-290,共13页
BACKGROUND Preoperative anxiety is a significant concern for patients,as it affects surgical outcomes,satisfaction,and pain perception.Although both anxiety and pain are common in surgical settings,their relationship ... BACKGROUND Preoperative anxiety is a significant concern for patients,as it affects surgical outcomes,satisfaction,and pain perception.Although both anxiety and pain are common in surgical settings,their relationship with personality traits has not been previously investigated in the Lebanese population.AIM To examine the prevalence of preoperative anxiety,pain perception,and personality traits among Lebanese surgical patients,and to assess the associations between these factors.METHODS A descriptive cross-sectional study was conducted between April 2024 and January 2025 across Lebanese hospitals.A total of 392 adult patients were recruited through convenience sampling.Data were collected using a questionnaire that included sociodemographic,clinical,and surgical variables,the Amsterdam Preoperative Anxiety and Information Scale for anxiety,the Visual Analog Scale and Numerical Pain Rating Scale for preoperative pain,and the Ten-Item Personality Inventory for personality traits.Ethical approval was obtained from the Institutional Review Boards of Makassed General Hospital and Hammoud University Medical Center.RESULTS Overall,25%of participants experienced preoperative anxiety,and 34.5%reported moderate pain.Personality assessment showed that the majority of participants had moderate extraversion(84.1%),moderate emotional stability(65.1%),high conscientiousness(61%),high agreeableness(54.1%),and moderate openness(49.2%).High conscientiousness was significantly associated with higher pain perception(P<0.05),while high emotional stability was associated with lower levels of anxiety(P<0.05).No significant association was found between preoperative anxiety and pain(P>0.05).CONCLUSION This study challenges the assumption that preoperative anxiety and pain are directly correlated and highlights the role of personality traits in shaping patient experience.These findings support the potential value of integrating psychological profiling into preoperative care and lay the groundwork for developing personalized interventions to improve patient-centered surgical outcomes. 展开更多
关键词 Preoperative anxiety Pain perception personality traits CONSCIENTIOUSNESS Emotional stability Lebanese hospitals Surgical patients personalized care strategies
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风力发电项目PC总承包单位的全面项目管理分析
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作者 余德琼 《云南水力发电》 2026年第2期129-132,共4页
近年来全球能源结构转型、环境保护愈发受到重视,风力发电项目作为可再生能源重要组成部分,其顺利实施于促进清洁能源发展、碳中和目标实现具有重要意义。以风力发电项目全面管理为主展开研究,拟从风力发电项目PC总承包单位角度出发,全... 近年来全球能源结构转型、环境保护愈发受到重视,风力发电项目作为可再生能源重要组成部分,其顺利实施于促进清洁能源发展、碳中和目标实现具有重要意义。以风力发电项目全面管理为主展开研究,拟从风力发电项目PC总承包单位角度出发,全面探析项目管理关键内容,以尽可能地提高风力发电项目整体效率、效益。研究中具体分析了PC总承包项目管理基本特征,主要涉及充分控制工程施工成本、降低项目运作费用、优化创新工程管理,同时也明晰了PC总承包在风力发电项目建设中的核心角色。进一步地详细阐述PC总承包单位的角色定义、职责,从物资设备采购、施工期间项目管理、沟通协调等多维度出发,提出实现风力发电项目全面管理的具体方案。 展开更多
关键词 风力发电项目 pc总承包单位 项目管理 质量卓越 安全优先
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悬臂式双排PC工法桩施工质量监督要点研究
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作者 顾俐格 《山西建筑》 2026年第5期167-170,共4页
深基坑新型悬臂式双排PC工法桩施工质量直接关系到基坑稳定与周边环境安全,针对此,文中结合施工工法以及在超深地下连续墙工程中“全流程、精细化、预控式”的监督管理思路,系统分析了悬臂式双排PC工法桩施工过程中的关键环节与潜在风... 深基坑新型悬臂式双排PC工法桩施工质量直接关系到基坑稳定与周边环境安全,针对此,文中结合施工工法以及在超深地下连续墙工程中“全流程、精细化、预控式”的监督管理思路,系统分析了悬臂式双排PC工法桩施工过程中的关键环节与潜在风险。从施工准备、桩体施工、冠梁连接至最终验收的全生命周期出发,探讨了以材料质量控制、工艺过程控制、节点连接控制及监测预警为核心的监督要点,旨在构建一套适用于该类新型支护结构的质量安全监督体系,助力基坑工程的高质量与绿色发展。 展开更多
关键词 悬臂式双排pc工法桩 施工质量 监督管理 风险预控 全流程控制
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高/低表达miR-122-5p稳转PC12细胞株的构建和鉴定 被引量:1
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作者 陶代菊 苏海玉 +2 位作者 王宇琪 沈志强 何波 《中国组织工程研究》 北大核心 2026年第7期1790-1799,共10页
背景:MicroRNA-122-5p(miR-122-5p)作为微小RNA(miRNA)家族中的关键成员,在调控基因表达及多种疾病的发生发展中扮演着重要的角色,然而其确切的作用机制尚未完全阐明。构建稳定的miR-122-5p高/低表达PC12细胞模型,可为深入研究miR-122-5... 背景:MicroRNA-122-5p(miR-122-5p)作为微小RNA(miRNA)家族中的关键成员,在调控基因表达及多种疾病的发生发展中扮演着重要的角色,然而其确切的作用机制尚未完全阐明。构建稳定的miR-122-5p高/低表达PC12细胞模型,可为深入研究miR-122-5p在神经系统疾病中的确切作用机制以及发现潜在治疗靶点提供有力的实验工具。目的:旨在构建高/低表达大鼠miR-122-5p慢病毒载体,并以此建立稳定高/低表达miR-122-5p的PC12细胞株,为进一步研究miR-122-5p在神经系统疾病中的作用奠定基础。方法:根据miR-122-5p基因序列设计合成引物,通过PCR扩增该基因片段。将目的基因定向接入经AgeI/NheI酶切的载体质粒GV369中,构建重组慢病毒质粒。筛选阳性克隆,并进行测序比对结果。将质粒载体与目的质粒载体同293T细胞共培养转染,获得慢病毒原液进行包装和滴度测定。通过体外培养PC12细胞,确定嘌呤霉素工作浓度。慢病毒分别与PC12细胞共培养,确定转染效率,用嘌呤霉素挑选出稳定转染细胞,RT-qPCR法检测稳定转染细胞株的miR-122-5p表达量。结果与结论:①测序序列与目的序列一致提示重组慢病毒载体构建成功,高表达慢病毒滴度为4×10^(8)TU/mL,miR-122-5p低表达慢病毒滴度为1×10^(9)TU/mL;②PC12细胞嘌呤霉素工作浓度为3.5μg/mL;③高表达miR-122-5p慢病毒转染PC12细胞的最佳条件为HiTransG P转染增强液,且感染复数值=10;感染复数值=50时低表达miR-122-5p效率最高;④RT-qPCR结果显示,高表达稳转细胞株中miR-122-5p的表达量有明显升高,而低表达稳转细胞株中miR-122-5p表达量显著降低;⑤此次研究成功构建了高/低表达miR-122-5p慢病毒载体,并获得稳转PC12细胞株,为miR-122-5p在神经系统疾病中的进一步研究提供了实验基础。 展开更多
关键词 pc12细胞 微小RNA 慢病毒载体 质粒 miR-122-5p 稳转细胞株 神经系统疾病 缺血性脑卒中
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National identity and subjective well-being among college students:A sequential mediation analysis of collective and personal self-esteem
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作者 Luming Zhao Jiaxi Zhang +1 位作者 Yan Zhang Jiaxi Peng 《Journal of Psychology in Africa》 2026年第1期1-8,共8页
The current study examined the roles of collective self-esteem and personal self-esteem in the relationship between national identity and subjective well-being.Participants were 583 Chinese college students(females=49... The current study examined the roles of collective self-esteem and personal self-esteem in the relationship between national identity and subjective well-being.Participants were 583 Chinese college students(females=49%;mean age=19.25±1.85 years).They completed measures of national identity,collective self-esteem,personal self-esteem,and subjective well-being.Path analysis findings result indicated national identity to influence the students’subjective wellbeing through three pathways:(1)national identity→collective self-esteem→subjective well-being,meaning higher subjective wellbeing with collective self-esteem.(2)national identity→personal self-esteem→subjective well-being,to suggest higher personal self-esteem was associated with subjective wellbeing;(3)national identity→collective selfesteem→personal self-esteem→subjective well-being.Compared to simple mediation models constructed with only personal self-esteem or collective self-esteem as a single mediating variable,the chain mediation model better explains the mediating mechanism of national identity on subjective well-being(the variance explained by the mediating variables increased by 65.38%and 59.26%,respectively).The collective self-esteem and personal self-esteem mediation is consistent with social identity theory,whereby national identity enhances collective self-evaluation,which in turn bolsters personal self-worth and subjective well-being.These findings of the current study offer new insights into how national identity affects subjective well-being in collectivistic culture. 展开更多
关键词 National identity collective self-esteem personal self-esteem mediating effect
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PC连续箱梁桥竖向预应力最大间距设置研究
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作者 汪凡 鲁晓磊 《中外公路》 2026年第1期151-160,共10页
为明确大跨PC连续箱梁桥竖向预应力间的应力场分布规律及最大竖向预应力间距的布置标准,该文推导了2根预应力束作用下的腹板应力场解析解。在此基础上分析了不同预应力间距及截面高度下的竖向应力场分布规律。在保证腹板高应力度状态的... 为明确大跨PC连续箱梁桥竖向预应力间的应力场分布规律及最大竖向预应力间距的布置标准,该文推导了2根预应力束作用下的腹板应力场解析解。在此基础上分析了不同预应力间距及截面高度下的竖向应力场分布规律。在保证腹板高应力度状态的前提下,并考虑由竖向预应力扩散角引起的预应力盲区,通过引入截面应力均匀度指标,提出了最大预应力间距的设置建议。结果表明:(1)应力场解析解能较好地反映腹板竖向正应力的分布规律;(2)竖向预应力筋之间的应力分布随着预应力间距的改变相应变化:当竖向预应力间距较小时,扩散效应较为明显;随着竖向预应力间距的增大,扩散效应逐渐转为叠加效应;(3)为控制连续梁桥L/4位置附近的竖向正应力水平,最大竖向预应力间距应保证控制截面应力均匀度水平大于0.95。 展开更多
关键词 桥梁工程 pc连续箱梁桥 最大预应力间距 平面应力问题 预应力盲区 截面应力均匀度
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Personalized Recommendation System Using Deep Learning with Bayesian Personalized Ranking
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作者 Sophort Siet Sony Peng +1 位作者 Ilkhomjon Sadriddinov Kyuwon Park 《Computers, Materials & Continua》 2026年第3期1423-1443,共21页
Recommendation systems have become indispensable for providing tailored suggestions and capturing evolving user preferences based on interaction histories.The collaborative filtering(CF)model,which depends exclusively... Recommendation systems have become indispensable for providing tailored suggestions and capturing evolving user preferences based on interaction histories.The collaborative filtering(CF)model,which depends exclusively on user-item interactions,commonly encounters challenges,including the cold-start problem and an inability to effectively capture the sequential and temporal characteristics of user behavior.This paper introduces a personalized recommendation system that combines deep learning techniques with Bayesian Personalized Ranking(BPR)optimization to address these limitations.With the strong support of Long Short-Term Memory(LSTM)networks,we apply it to identify sequential dependencies of user behavior and then incorporate an attention mechanism to improve the prioritization of relevant items,thereby enhancing recommendations based on the hybrid feedback of the user and its interaction patterns.The proposed system is empirically evaluated using publicly available datasets from movie and music,and we evaluate the performance against standard recommendation models,including Popularity,BPR,ItemKNN,FPMC,LightGCN,GRU4Rec,NARM,SASRec,and BERT4Rec.The results demonstrate that our proposed framework consistently achieves high outcomes in terms of HitRate,NDCG,MRR,and Precision at K=100,with scores of(0.6763,0.1892,0.0796,0.0068)on MovieLens-100K,(0.6826,0.1920,0.0813,0.0068)on MovieLens-1M,and(0.7937,0.3701,0.2756,0.0078)on Last.fm.The results show an average improvement of around 15%across all metrics compared to existing sequence models,proving that our framework ranks and recommends items more accurately. 展开更多
关键词 Recommendation systems traditional collaborative filtering Bayesian personalized ranking
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The Impact of Personalized Nutritional Support on Complications and Pregnancy Outcomes in Advanced Maternal Age Women with Gestational Diabetes Mellitus
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作者 Jiaqi Xiong 《Journal of Clinical and Nursing Research》 2026年第1期48-55,共8页
Objective:To explore the clinical effect of personalized nutritional support in elderly women with gestational diabetes(GDM),and explore its impact on the incidence of maternal complications and pregnancy outcomes.Met... Objective:To explore the clinical effect of personalized nutritional support in elderly women with gestational diabetes(GDM),and explore its impact on the incidence of maternal complications and pregnancy outcomes.Methods:A total of 90 elderly pregnant women with gestational diabetes who were delivered in our hospital from January 2023 to January 2024 were selected as the research objects.They were randomly divided into an observation group and a control group,with 45 cases in each group.The control group only received routine pregnancy care and basic nutrition guidance,while the observation group received personalized nutrition support on this basis.Compare the blood glucose control,incidence of pregnancy complications,pregnancy outcomes,and neonatal outcomes between two groups of parturient.Result:After intervention,the fasting blood glucose(FPG),2-hour postprandial blood glucose(2hPG),and glycated hemoglobin(HbA1c)of the observation group were significantly lower than those of the control group,and the differences were statistically significant(p<0.05);The incidence of complications such as gestational hypertension syndrome,polyhydramnios,premature rupture of membranes,and postpartum hemorrhage in the observation group was significantly lower than that in the control group,and the difference was statistically significant(p<0.05);The cesarean section rate in the observation group was significantly lower than that in the control group,and the incidence of adverse neonatal outcomes such as fetal distress,macrosomia,neonatal asphyxia,and neonatal hypoglycemia in the observation group was significantly lower than that in the control group,with statistical significance(p<0.05).Conclusion:Individualized nutritional support for elderly women with gestational diabetes can effectively improve the level of maternal blood sugar control,reduce the incidence of complications during pregnancy,and improve the outcome of pregnancy and neonatal outcomes,which is of high clinical value. 展开更多
关键词 personalized nutritional support Elderly parturient Gestational diabetes COMPLICATION Pregnancy outcome Newborn outcome
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Formulating an Innovative Gamified Personalized Learning Ecosystem Integrating 3D/VR Environments,Machine Learning,and Business Intelligence
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作者 Nymfodora-Maria Raftopoulou Petros L.Pallis 《Sociology Study》 2026年第1期13-32,共20页
Latest digital advancements have intensified the necessity for adaptive,data-driven and socially-centered learning ecosystems.This paper presents the formulation of a cross-platform,innovative,gamified and personalize... Latest digital advancements have intensified the necessity for adaptive,data-driven and socially-centered learning ecosystems.This paper presents the formulation of a cross-platform,innovative,gamified and personalized Learning Ecosystem,which integrates 3D/VR environments,as well as machine learning algorithms,and business intelligence frameworks to enhance learner-centered education and inferenced decision-making.This Learning System makes use of immersive,analytically assessed virtual learning spaces,therefore facilitating real-time monitoring of not just learning performance,but also overall engagement and behavioral patterns,via a comprehensive set of sustainability-oriented ESG-aligned Key Performance Indicators(KPIs).Machine learning models support predictive analysis,personalized feedback,and hybrid recommendation mechanisms,whilst dedicated dashboards translate complex educational data into actionable insights for all Use Cases of the System(Educational Institutions,Educators and Learners).Additionally,the presented Learning System introduces a structured Mentoring and Consulting Subsystem,thence reinforcing human-centered guidance alongside automated intelligence.The Platform’s modular architecture and simulation-centered evaluation approach actively support personalized,and continuously optimized learning pathways.Thence,it exemplifies a mature,adaptive Learning Ecosystem,supporting immersive technologies,analytics,and pedagogical support,hence,contributing to contemporary digital learning innovation and sociotechnical transformation in education. 展开更多
关键词 gamified learning ecosystems learning analytics business intelligence personalized education virtual reality machine learning
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Novel Statistical Shape Relation and Prediction of Personalized Female Pelvis,Pelvic Floor,and Perineal Muscle Shapes
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作者 Tan-Nhu Nguyen Trong-Pham Nguyen-Huu Tien-Tuan Dao 《Computer Modeling in Engineering & Sciences》 2026年第2期1-47,共47页
Vaginal delivery is a fascinating physiological process,but also a high-risk process.Up to 85%–90%of vaginal deliveries lead to perineal trauma,with nearly 11%of severe perineal tearing.It is a common occurrence,espe... Vaginal delivery is a fascinating physiological process,but also a high-risk process.Up to 85%–90%of vaginal deliveries lead to perineal trauma,with nearly 11%of severe perineal tearing.It is a common occurrence,especially for first-time mothers.Computational childbirth plays an essential role in the prediction and prevention of these traumas,but fast personalization of the pelvis and floor muscles is challenging due to their anatomical complexity.This study introduces a novel shape-prediction-based personalization of the pelvis and floor muscles for perineal tearing management and childbirth simulation.300 subjects were selected from public Computed Tomography(CT)databases.The pelvic bone nmjmeshes were generated using a coarse-to-fine non-rigid mesh alignment procedure.The floor muscle meshes were personalized using the bone mesh deformation information.A feature-to-pelvic structure reconstruction pipeline was proposed,incorporating various strategies.Ten-fold cross-validation helped determine the optimal reconstruction strategy,regression method,and feature sizes.The mesh-to-mesh distance metric was employed for evaluating.The statistical shape relation-based strategy,coupled with multi-output ridge regression,was the optimal approach for pelvic structure reconstruction.With a feature set ranging from 3 to 38,the mean errors were 2.672 to 1.613 mm,and 3.237 to 1.415 mm in muscle attachment regions.The best-and worst-case predictions had errors of 1.227±0.959 mm and 2.900±2.309 mm,respectively.This study provides a novel approach to achieving fast personalized childbirth modeling and simulation for perineal tearing management. 展开更多
关键词 personalized statistical shape relation shape prediction female pelvis shape pelvic floor and perineal tissue shape
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Discontinuation of advanced therapy in inflammatory bowel disease:Updated evidence,guidelines,and personalized decision-making one year later
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作者 Salvatore Greco Michele Campigotto NicolòFabbri 《World Journal of Clinical Cases》 2026年第1期52-56,共5页
Therapy discontinuation in inflammatory bowel disease,particularly involving immunomodulators,biologics,and small molecules,remains a controversial and evolving topic.This letter reflects on developments following the... Therapy discontinuation in inflammatory bowel disease,particularly involving immunomodulators,biologics,and small molecules,remains a controversial and evolving topic.This letter reflects on developments following the publication by Meštrovićet al,emphasizing the complex balance between risks of relapse,antidrug antibody formation,and potential complications of long-term immunosuppression.Recent evidence underscores high relapse rates following withdrawal-especially of anti-tumor necrosis factor agents-and highlights the lack of robust data for newer biologics.Updated guidelines from European Crohn’s and Colitis Organization,British Society of Gastroenterology,and American College of Gastroenterology all support cautious and individualized approaches,with strict criteria and close follow-up,particularly in Crohn’s disease.For ulcerative colitis,therapeutic cycling remains insufficiently addressed.We proposed a flowchart to support clinical decision-making and stress the importance of shared decisionmaking in the era of personalized medicine since,despite new drug classes and evolving strategies,the therapeutic ceiling in inflammatory bowel disease has yet to be fully overcome. 展开更多
关键词 Crohn’s disease Ulcerative colitis Inflammatory bowel disease Biologic therapy Discontinuation of therapy personalized medicine
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装配式建筑PC构件安装精度控制关键技术研究
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作者 王进州 《中国建筑金属结构》 2026年第2期43-45,共3页
针对装配式建筑预制混凝土(PC)构件安装精度控制难题,本文以漳州市金峰实验小学项目为背景,系统开展基于建筑信息模型(BIM)的安装精度预控、多级测量网络构建与误差调控、区块链技术赋能的精度追溯等装配式建筑PC构件安装精度控制技术... 针对装配式建筑预制混凝土(PC)构件安装精度控制难题,本文以漳州市金峰实验小学项目为背景,系统开展基于建筑信息模型(BIM)的安装精度预控、多级测量网络构建与误差调控、区块链技术赋能的精度追溯等装配式建筑PC构件安装精度控制技术研究。研究结果表明,该技术体系使PC构件安装合格率达到98.5%,直接节约成本约86万元,对推动行业精细化施工管理水平提升具有积极意义。 展开更多
关键词 装配式建筑 pc构件 安装精度
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规模化装配式建筑施工中PC竖向构件快速校正技术研究
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作者 陈王东 《中文科技期刊数据库(全文版)工程技术》 2026年第1期009-012,共4页
本文依托兰州地区某高层装配式住宅工程,针对PC竖向构件安装中精度控制与效率提升需求,系统实施高精度预制、干式节点连接、临时支撑调节及动态测量校正等技术措施。通过工厂端模具控制与实测建档、运输过程姿态监测、吊装阶段初定位与... 本文依托兰州地区某高层装配式住宅工程,针对PC竖向构件安装中精度控制与效率提升需求,系统实施高精度预制、干式节点连接、临时支撑调节及动态测量校正等技术措施。通过工厂端模具控制与实测建档、运输过程姿态监测、吊装阶段初定位与微调结合、可调斜撑分级调节及多源仪器联合测量,实现构件垂直度偏差≤4.2 mm、轴线位置偏差≤6.5 mm、标高误差±2.1 mm的控制效果。现场校正单件平均耗时由45分钟降至25分钟,标准层施工周期缩短40%,节点连接强度达设计值1.15倍以上,淋水试验无渗漏。实践表明,该技术体系适应西北地区风沙大、温差显著的环境特点,在保障结构安全的同时,有效提升装配式建筑施工质量与建造效率。 展开更多
关键词 建筑工程 pc构件 构件安装 工艺实践
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装配式建筑PC构件造价组成解析
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作者 张丽娟 《四川建材》 2026年第1期217-219,共3页
深入探讨装配式PC构件造价的构成,详细分析装配化率对结构指标和成本单方造价的具体影响。通过结合实际案例,对装配式建筑造价的各类因素进行全面解析,并着重比较装配式建筑与传统剪力墙结构建筑在造价方面的差异。研究不仅有助于相关... 深入探讨装配式PC构件造价的构成,详细分析装配化率对结构指标和成本单方造价的具体影响。通过结合实际案例,对装配式建筑造价的各类因素进行全面解析,并着重比较装配式建筑与传统剪力墙结构建筑在造价方面的差异。研究不仅有助于相关人员更准确地掌握装配式建筑的成本构成,而且为未来装配式建筑项目的造价预算提供有价值的参考和借鉴。随着装配式建筑技术的不断发展,期待其成本效益能够得到进一步优化,推动建筑行业的绿色、高效发展。 展开更多
关键词 装配式建筑 造价 成本 pc构件 装配化率
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