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基于SBAS-InSAR技术的富源县后所镇煤矿区沉降分析
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作者 何伟 王瑞雪 +2 位作者 杨彦武 郭忠正 冯一鸣 《工程勘察》 2026年第1期76-82,90,共8页
云南省富源县境内煤炭资源丰富,是重要的煤矿产区。随着采煤活动的不断进行,地下的岩石应力场遭到严重破坏,地面发生大量沉降变形,对周边群众生命及建筑物造成安全威胁。本文采用Sentinel-1A影像升轨数据,运用SBAS-InSAR技术,获取研究... 云南省富源县境内煤炭资源丰富,是重要的煤矿产区。随着采煤活动的不断进行,地下的岩石应力场遭到严重破坏,地面发生大量沉降变形,对周边群众生命及建筑物造成安全威胁。本文采用Sentinel-1A影像升轨数据,运用SBAS-InSAR技术,获取研究区地面沉降范围、速率及沉降过程的连续、定量化信息,分析后所镇地面沉降演化过程及塌陷成因分析。研究区沉降高值区为东北部煤矿区,与野外调查结果吻合,且地面沉降速度和地表范围有加强扩大趋势。本文研究结果可为该区地面塌陷的预防和防治提供定量化的决策信息。 展开更多
关键词 Sentinel-1A sbas-insar 地表形变 地面沉降 矿区
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SBAS-InSAR与CNN-LSTM融合的石墨尾矿坝形变时空耦合分析与动态预警模型
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作者 王跃 李如仁 毕升 《地震工程学报》 北大核心 2026年第2期285-296,共12页
石墨尾矿坝作为高势能堆积体,因石墨尾矿选矿工艺,使颗粒呈双峰结构分布,导致其内部受力情况及失稳机理复杂,滑坡风险高且难以预测。因此,通过短基线集干涉测量(SBAS-InSAR)技术反演石墨尾矿坝表面的时序形变特征,并结合监测数据构建卷... 石墨尾矿坝作为高势能堆积体,因石墨尾矿选矿工艺,使颗粒呈双峰结构分布,导致其内部受力情况及失稳机理复杂,滑坡风险高且难以预测。因此,通过短基线集干涉测量(SBAS-InSAR)技术反演石墨尾矿坝表面的时序形变特征,并结合监测数据构建卷积长短期记忆网络(CNN-LSTM)模型,以预测其形变趋势。首先,利用SBAS-InSAR技术处理2019年12月—2021年12月的60景SAR影像,获取研究区累计形变量和年均形变速率,通过对比现场GNSS同名监测点数据,并结合误差评价指标分析,验证InSAR监测精度;然后,分析降雨量与沉降量的关联特性,得出沉降量与降雨量呈周期性变化特征,揭示尾矿坝形变的内在机理;最后,构建CNN-LSTM模型,引入长短期记忆(LSTM)模型和双向循环神经网络(BiGRU)模型,通过误差指标及损失函数对训练及预测结果进行评价。结果表明:(1)尾矿坝顶部表现为沉降,坡顶点b沉降量为189.74 mm,由顶部外扩展,沉降量呈减小趋势,直至坡脚变为抬升,坡脚处点a、f抬升量分别为13.8 mm、26.8 mm;(2)SBAS-InSAR技术与全球导航卫星系统(GNSS)监测结果最大绝对误差4.67 mm,误差分布均匀,SBAS-InSAR技术对石墨尾矿形变监测满足精度要求;(3)降雨为尾矿坝形变主要影响因素,随石墨尾矿内含水量变化,形变呈周期波动特性;(4)对三种预测模型比较分析,可知CNN-LSTM模型损失函数训练集和测试集的曲线拟合度高,表明训练效果好,揭示了该模型预测石墨尾矿形变结果较优,6个特征点位预测误差指标显示,最大均方根误差小于2.06 mm,平均绝对误差小于1.60 mm,决定系数最大值0.89。因此,文章可为北方地区石墨尾矿灾害监测及预警提供技术支撑。 展开更多
关键词 Sentinel-1A sbas-insar 石墨尾矿库 形变智能识别 CNN-LSTM
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基于SBAS-InSAR与PSO-LSTM的露天矿地表形变预测方法
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作者 郑俊析 杨飞 +3 位作者 王浩宇 杨志勇 李军 胡桂林 《金属矿山》 北大核心 2026年第2期259-268,共10页
对露天矿地表形变的特征和趋势进行分析和预测,是保障矿山绿色安全生产的重要环节。面向特大型露天矿,以新疆将军戈壁二号露天矿为例,基于SBAS-InSAR方法和粒子群优化算法的长短期记忆网络(PSO-LSTM)模型,提出了一种露天矿地表形变分析... 对露天矿地表形变的特征和趋势进行分析和预测,是保障矿山绿色安全生产的重要环节。面向特大型露天矿,以新疆将军戈壁二号露天矿为例,基于SBAS-InSAR方法和粒子群优化算法的长短期记忆网络(PSO-LSTM)模型,提出了一种露天矿地表形变分析与预测方法。该方法首先通过SBAS-InSAR方法计算了该矿地表形变,在此基础上针对当前水准测量、GNSS等形变监测方式在特大型露天矿存在的效率较低、空间覆盖范围有限等问题,采用粒子群优化算法(Genetic Algorithm Optimization,PSO)优化长短期记忆模型(Long Short-term Memory,LSTM),构建了PSO-LSTM模型进行形变预测。研究表明:(1)矿区整体平均形变速率为-2.832 mm/a,整体呈下沉趋势,其中内排土场地表形变速率明显高于其他区域;空间上,内排土场、东排土场分布较为均匀;时间上,东排土场和北排土场形变速率较低,速率大小较为恒定。(2)通过剖面线可以发现,北排土场空间形变分布呈现非均匀性,东排土场则表现出相对均衡的形变特征。采用均方根误差(Root Mean Square Error,RMSE)和平均绝对误差(Mean Absolute Error,MAE)、平均绝对百分比误差(Mean Absolute Percentage Error,MAPE)和决定系数(R2)作为预测精度的评价指标。结果显示:相对于支持向量回归模型(Support Vector Regression,SVR)和LSTM模型,PSO-LSTM模型的RMSE和MAE至少降低了16%和30%,PSO-LSTM模型稳定性更好、偏差更小,反映出该模型能够有效捕捉采区地表形变的波动趋势,并且具有一定的稳定性。研究成果为露天矿地表形变分析与预警提供了新思路,对于特大型露天矿地表形变监测与预测有一定的参考意义。 展开更多
关键词 露天矿 sbas-insar方法 形变预测 PSO-LSTM模型 粒子群优化算法 长短期记忆模型
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基于SBAS-InSAR的高寒矿区排土场沉降监测与分析
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作者 李亚磊 宫传刚 +1 位作者 张浩 刘余娜 《煤炭技术》 2026年第2期48-53,共6页
高寒矿区排土场受复杂气候与地质条件影响,地质灾害隐患日益显著,对生态安全与矿业可持续发展构成严重威胁。传统监测手段在高寒恶劣环境下存在成本高、覆盖范围有限等不足。针对该问题,基于60景Sentinel-1B卫星数据,采用短基线集干涉... 高寒矿区排土场受复杂气候与地质条件影响,地质灾害隐患日益显著,对生态安全与矿业可持续发展构成严重威胁。传统监测手段在高寒恶劣环境下存在成本高、覆盖范围有限等不足。针对该问题,基于60景Sentinel-1B卫星数据,采用短基线集干涉合成孔径雷达(SBASInSAR)技术,在2019-01-04—2021-12-19,对内蒙古宝日希勒露天煤矿排土场的地表形变特征进行监测分析。结合气象数据、无人机遥感数据、地质条件等信息分析形变结果。结果表明:研究区存在显著非均匀形变,年均形变速率-80.81~+16.57 mm/a,累积形变量为246.1 mm,沉降严重的区域集中,分布于排土场顶部的斜坡边缘,降水、冻融循环是导致形变加剧的主要因素。 展开更多
关键词 高寒矿区 排土场 sbas-insar 形变分析 冻融循环
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结合SBAS-InSAR与IPSO-CNN-LSTM优化模型的尾矿库监测与预测研究
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作者 袁利伟 张舒寒 +2 位作者 李延林 杨四美 聂晗 《安全与环境学报》 北大核心 2026年第3期980-991,共12页
针对传统尾矿库监测手段的局限性及预测模型处理长时序数据时易丢失信息的问题,融合短基线集干涉合成孔径雷达(Small Baseline Subset Interferometric Synthetic Aperture Radar,SBAS-InSAR)与改进粒子群算法(Improved Particle Swarm ... 针对传统尾矿库监测手段的局限性及预测模型处理长时序数据时易丢失信息的问题,融合短基线集干涉合成孔径雷达(Small Baseline Subset Interferometric Synthetic Aperture Radar,SBAS-InSAR)与改进粒子群算法(Improved Particle Swarm Optimization,IPSO)优化卷积神经网络(Convolutional Neural Network,CNN)-长短期记忆(Long Short-Term Memory,LSTM)网络,构建监测预测模型。以云南某铅锌矿尾矿库为例,基于97景哨兵一号影像和SBAS-InSAR技术监测地表形变,结合GNSS数据验证。结果表明:垂向最大沉降形变速率为58.56 mm/a,累计最大沉降量为233.76 mm;并运用经验模态分解(Empirical Mode Decomposition,EMD)揭示了降雨与沉降的关联。研究表明:IPSO-CNN-LSTM模型的各项误差评价指标均显著低于单一模型及CNN-LSTM模型,且其决定系数均高于97%;IPSO-CNN-LSTM模型在预测尾矿库形变方面展现出更高的精度和稳定性,并能准确捕捉降雨波动性和趋势性的影响,为尾矿库的后续监测与管理提供了坚实的技术支撑。 展开更多
关键词 安全工程 尾矿库 sbas-insar技术 IPSO-CNN-LSTM预测模型 形变监测 形变预测
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基于SBAS-InSAR的连云港软基海堤沉降识别与隐患评估
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作者 王健 朱文谨 +3 位作者 董啸天 张洋 许青 张帝 《吉林水利》 2026年第2期1-9,共9页
沿海软土地基海堤沉降会降低堤防的安全防护能力,低成本且有效的海堤沉降监测对合理维护海堤有指导作用。以连云港海堤为研究对象,利用SBAS-InSAR方法对2019~2021年Sentinel-1A升轨影像和Sentinel-1B降轨影像进行处理,得到连云港海堤竖... 沿海软土地基海堤沉降会降低堤防的安全防护能力,低成本且有效的海堤沉降监测对合理维护海堤有指导作用。以连云港海堤为研究对象,利用SBAS-InSAR方法对2019~2021年Sentinel-1A升轨影像和Sentinel-1B降轨影像进行处理,得到连云港海堤竖向形变的时序结果并进行分析。结果表明:升降轨模式下,形变时序均呈现一致的沉降趋势;融合后的形变时序结果与单一升、降轨道下的形变时序结果呈现一致趋势;反演得到的连云港海堤形变主要发生在赣榆中部和南部、连云区徐圩地区及灌云县北部,反演结果与实测沉降较大区域基本一致。研究验证了SBAS-InSAR技术在连云港海堤沉降研究中的可行性,为连云港沿海地区人民群众生活提供了安全保障,也为当地海洋灾害预警研究提供技术支持。 展开更多
关键词 软土地基 海堤 沉降 sbas-insar技术
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SBAS-InSAR技术在岩溶塌陷识别监测中的应用探析
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作者 路丹 鲁金金 +3 位作者 居和建 吴二 覃莹璐 黄瑶 《科技与创新》 2026年第1期42-45,共4页
中国作为岩溶大国,其岩溶区域的地质环境极为脆弱,极易发生岩溶塌陷,对生命安全构成严重威胁。岩溶塌陷具有隐蔽性和突发性特点,因此,对其进行精准研判和有效监测显得尤为重要。以广西富川瑶族自治县为研究对象,基于哨兵1号雷达遥感数据... 中国作为岩溶大国,其岩溶区域的地质环境极为脆弱,极易发生岩溶塌陷,对生命安全构成严重威胁。岩溶塌陷具有隐蔽性和突发性特点,因此,对其进行精准研判和有效监测显得尤为重要。以广西富川瑶族自治县为研究对象,基于哨兵1号雷达遥感数据,运用SBAS-InSAR(Small Baseline Subset-InSAR,差分干涉测量短基线集时序分析)技术对该县域地表形变进行监测,并以下坝山村岩溶塌陷群为例,探讨了InSAR(Interferometric Synthetic Aperture Radar,合成孔径雷达干涉测量)技术在岩溶塌陷监测中的实际应用效果,进而分析该技术在岩溶塌陷监测中的可行性,以期为地质灾害的早期识别及科学防灾减灾提供宝贵的参考依据。 展开更多
关键词 sbas-insar技术 岩溶塌陷 地表形变 监测
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黔西输电廊道Sentinel-1A可视性与升降轨SBAS-InSAR滑坡识别研究
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作者 张元胤 杨紫霄 +5 位作者 魏朝志 贾健 路颜嘉 刘彪 周腾 陈家和 《中国地质灾害与防治学报》 2026年第1期88-99,共12页
西电东送是保障我国电力安全和资源优化的重大工程,也是输电廊道中滑坡、崩塌灾害最突出的廊道之一。InSAR技术适于广域滑坡识别,但山区受SAR影像几何畸变影响易出现漏判错判,需进行可视性分析以确保滑坡识别的可靠性。文章基于开放获... 西电东送是保障我国电力安全和资源优化的重大工程,也是输电廊道中滑坡、崩塌灾害最突出的廊道之一。InSAR技术适于广域滑坡识别,但山区受SAR影像几何畸变影响易出现漏判错判,需进行可视性分析以确保滑坡识别的可靠性。文章基于开放获取的哨兵(Sentinel-1A)升降轨数据,采用真实入射角对研究区进行SAR可视性定量分析,同时结合SBAS-InSAR形变结果和现场调查结果判识黔西输电廊道的潜在滑坡。研究结果表明:升、降轨影像的入射角由近端至远端逐渐增大,增量分别为11.5°和12.2°,对可视性分析影响较大。当中山地貌的坡度小于入射角占比为90.5%时,升、降轨单轨观测几何畸变区(叠掩、阴影和透视收缩)的占比分别为46.8%和51.2%,而采用升降轨联合观测的几何畸变较前者显著降低至6.1%,透视收缩区可视性得到极大改善。通过LOS形变和现场调查判别出潜在滑坡和崩塌2处。文章提出的入射角平距算法与像素列算法结果相近,最大偏差仅3.3%;根据形变速率图和剖面累计形变曲线划分崩塌区和堆积区,可为深入分析潜在滑坡提供技术支持。 展开更多
关键词 几何畸变 sbas-insar 入射角 InSAR升降轨 滑坡识别
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基于SBAS-InSAR的煤矿地表沉陷监测研究
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作者 吴建林 吴涛 赵子超 《能源与节能》 2026年第1期20-22,27,共4页
为精准监测煤矿开采引发的地表沉陷问题,克服传统监测手段时空分辨率低、成本高的局限性,采用SBAS-InSAR(Small Baseline Subset-Interferometric Synthetic Aperture Radar,小基线集-干涉合成孔径雷达)技术,结合Sentinel-1A卫星影像数... 为精准监测煤矿开采引发的地表沉陷问题,克服传统监测手段时空分辨率低、成本高的局限性,采用SBAS-InSAR(Small Baseline Subset-Interferometric Synthetic Aperture Radar,小基线集-干涉合成孔径雷达)技术,结合Sentinel-1A卫星影像数据,以典型煤矿区为例,开展地表沉陷时空演变规律及监测精度分析。通过构建短时空基线干涉网络降低失相干与大气延迟影响,利用SVD(Singular Value Decomposition,奇异值分解)反演时序形变,结合水准数据验证监测精度。结果表明:SBAS-InSAR技术可捕捉毫米级形变,累计沉降量达329.12 mm,年均沉降速率最高为168.03 mm/a,且沉降空间分布与采空区位置高度吻合;沉降动态受地下水位波动、开采强度及地质构造(如断裂带)的复合影响显著,精度评估显示与地面实测数据误差小于5 mm。研究验证了SBAS-InSAR技术在矿区大范围、高精度监测中的优势,为沉陷灾害预警及生态修复提供了科学依据。 展开更多
关键词 sbas-insar技术 煤矿开采 地表沉陷监测 遥感影像数据
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基于SBAS-InSAR甲居滑坡形变监测与演变特征分析
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作者 戴叶明 黄志杰 +2 位作者 朱贞榕 曾宇 赵中海 《北京测绘》 2026年第1期37-45,共9页
甲居滑坡位于四川省甘孜州丹巴县甲居藏寨风景区,受地质构造、大金川河侵蚀及降水等多因素影响,长期处于不稳定状态,给当地居民及基础设施安全带来潜在威胁。为揭示其变形机制及演化特征,本文基于2021年1月至2022年6月哨兵数据1A(Sentin... 甲居滑坡位于四川省甘孜州丹巴县甲居藏寨风景区,受地质构造、大金川河侵蚀及降水等多因素影响,长期处于不稳定状态,给当地居民及基础设施安全带来潜在威胁。为揭示其变形机制及演化特征,本文基于2021年1月至2022年6月哨兵数据1A(Sentinel-1A)类型升轨雷达影像数据,采用小基线子集(SBAS-InSAR)技术进行监测分析。结果表明,甲居滑坡形变具有显著的空间异质性,雷达视线向(LOS)最大形变速率达-0.22 m/a,累计形变量达-0.312 m,并可划分为三个次级滑动区。后缘受重力驱动呈现缓慢后退式变形,前缘则在大金川河侵蚀及水动力作用下表现为牵引式滑移。形变过程经历了初始累积、局部加速、整体扩展及阶段性增强四个阶段,其中2021年9—10月及2022年2—3月,降水与融雪引发的孔隙水压力骤增显著加速了滑坡变形。监测点分析表明,滑坡形变与降雨量高度相关,在降雨集中期形变速率明显上升,并具有一定的滞后效应。研究揭示了甲居滑坡在地质结构、降水及水动力作用下的协同驱动机制,为区域滑坡灾害监测、预警及防控提供了科学依据。 展开更多
关键词 甲居滑坡 小基线子集(sbas-insar) 形变监测 演化特征
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Study on the effect of preparation method on denitration performance of Co-modified Ce/TiO_(2) catalyst
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作者 YU Chao ZHANG Boya +2 位作者 SHEN Kai HAN Yuxuan ZHANG Yaping 《燃料化学学报(中英文)》 北大核心 2026年第3期79-91,共13页
This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO_(2) catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst’s... This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO_(2) catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst’s low-temperature denitrification activity.After identifying optimal preparation parameters via condition screening,multiple characterization techniques-including BET,XRD,XPS,H_(2)-TPR and in situ DRIFTS-were employed to deeply analyze the catalyst’s physicochemical properties and reaction mechanism.Results demonstrated that compared to the impregnation and co-precipitation methods,the Ce-Co_(0.025)/TiO_(2)-SG catalyst(prepared by the sol-gel method with a Co/Ti mass ratio of 0.025)exhibited significantly superior denitrification activity:NO conversion remained stably above 95%in the 225−350℃ temperature range,and it displayed high N_(2) selectivity.Characterization analysis revealed that abundant surface oxygen vacancies,a high proportion of Ce^(3+) species,and prominent acidic sites collectively contributed to enhancing its low-temperature denitrification performance.This work provides reference value for the development of highly efficient low-temperature denitrification catalysts. 展开更多
关键词 preparation method Co Ce/TiO_(2) low-temperature denitration NH3-SCR
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A New Inversion-free Iterative Method for Solving the Nonlinear Matrix Equation and Its Application in Optimal Control
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作者 GAO Xiangyu XIE Weiwei ZHANG Lina 《应用数学》 北大核心 2026年第1期143-150,共8页
In this paper,we consider the maximal positive definite solution of the nonlinear matrix equation.By using the idea of Algorithm 2.1 in ZHANG(2013),a new inversion-free method with a stepsize parameter is proposed to ... In this paper,we consider the maximal positive definite solution of the nonlinear matrix equation.By using the idea of Algorithm 2.1 in ZHANG(2013),a new inversion-free method with a stepsize parameter is proposed to obtain the maximal positive definite solution of nonlinear matrix equation X+A^(*)X|^(-α)A=Q with the case 0<α≤1.Based on this method,a new iterative algorithm is developed,and its convergence proof is given.Finally,two numerical examples are provided to show the effectiveness of the proposed method. 展开更多
关键词 Nonlinear matrix equation Maximal positive definite solution Inversion-free iterative method Optimal control
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Broadband ground motion simulation and analysis of a near-fault 3D basin-mountain coupling site based on the hybrid method
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作者 Liu Zhongxian Tang Kang +2 位作者 Li Chengcheng Yuan Xiaoming Zhang Hai 《Earthquake Engineering and Engineering Vibration》 2026年第1期87-110,共24页
This study presents an effective hybrid simulation approach for simulating broadband ground motion in complex near-fault locations.The approach utilizes a deterministic approach based on the spectral element method(SE... This study presents an effective hybrid simulation approach for simulating broadband ground motion in complex near-fault locations.The approach utilizes a deterministic approach based on the spectral element method(SEM),which is used to simulate low-frequency ground motion(f<1 Hz)by incorporating an innovative efficient discontinuous Galerkin(DG)method for grid division to accurately model basin sedimentary layers at reduced costs.It also introduces a comprehensive hybrid source model for high-frequency random scattering and a nonlinear analysis module for basin sedimentary layers.Deterministic outcomes are combined with modified three-dimensional stochastic finite fault method(3D-EXSIM)simulations of high-frequency ground motion(f>1 Hz).A fourth-order Butterworth filter with zero phase shift is employed for time-domain filtering of low-and high-frequency time series at a crossover frequency of 1 Hz,merging the low and high-frequency ground motions into a broadband time series.Taking an Ms 6.8 Luding earthquake,as an example,this hybrid method was used for a rapid and efficient simulation analysis of broadband ground motion in the region.The accuracy and efficiency of this hybrid method were verified through comparisons with actually observed station data and empirical attenuation curves.Deterministic method simulation results revealed the effects of mountainous topography,basin effects,nonlinear effects within the basin’s sedimentary layers,and a coupling interaction between the basin and the mountains.The findings are consistent with similar studies,showing that near-fault sedimentary basins significantly focus and amplify strong ground motion,and the soil’s nonlinear behavior in the basin influences ground motion to varying extents at different distances from the fault.The mountainous topography impacts the basin’s response to ground motion,leading to barrier effects.This research provides a scientific foundation for seismic zoning,urban planning,and seismic design in nearfault mountain basin regions. 展开更多
关键词 hybrid ground motion simulation method spectral element method three-dimensional stochastic finite fault method near-fault basin-mountain coupling effect basin effect nonlinear effect
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Establishment of a Determination Method for Fruit Texture in Chieh-qua Using Texture Analyzer
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作者 Ying WANG Xuan DU Na LIU 《Agricultural Biotechnology》 2026年第1期54-59,共6页
[Objectives]This study was conducted to establish a quantitative assessment method for the textural quality of chieh-qua fruit.[Methods]Using two modes of a texture analyzer,namely TPA(texture profile analysis)and pun... [Objectives]This study was conducted to establish a quantitative assessment method for the textural quality of chieh-qua fruit.[Methods]Using two modes of a texture analyzer,namely TPA(texture profile analysis)and puncture,the index data of the fruit were obtained by setting different trigger forces,deformation levels,test speeds,as well as puncture speeds and puncture depths.The data included TPA hardness,adhesiveness,springiness,cohesiveness,gumminess,chewiness,resilience,as well as skin hardness,skin toughness,flesh hardness,fracturability,and compactness.[Results]Different deformation levels had a significant impact on all parameters.Hardness,adhesiveness,gumminess and chewiness showed a trend of first increasing and then decreasing with the deformation level increasing.When the deformation level was 30%,the adhesiveness,gumminess and chewiness reached their maximum values.When the deformation level was 50%,TPA hardness reached its maximum.When the compression speed was 3 mm/s,the measured values of TPA hardness,adhesiveness,chewiness,and resilience were at their maximums.The skin hardness varied significantly under different trigger forces.When the trigger force was 15 g,the skin hardness reached a maximum value of 944.63 g,and the skin toughness,flesh hardness,fracturability,and compactness also reach their maximum values respectively.When the puncture depth was 12 mm,the flesh hardness and skin toughness reached their maximums of 682.51 g and 1.82 mm,respectively.In the TPA mode,the flesh hardness of chieh-qua showed an extremely significant negative correlation with springiness,cohesiveness,and resilience(P<0.01).The fruit fracturability detected by puncture had an extremely significant positive correlation with compactness(P<0.01).[Conclusions]The evaluation method for measuring chieh-qua texture by combining TPA and the puncture mode could accurately and quantitatively reflect the differences in the flesh texture quality of chieh-qua.The optimal parameters for texture measurement of chieh-qua fruit were determined as a 15 g trigger force with 50%deformation and a 3 mm/s compression speed in TPA mode,and a 15 g trigger force with a 12 mm puncture depth in puncture mode.Puncture speed was found to have no significant effect on the texture indices of chieh-qua. 展开更多
关键词 CHIEH-QUA Texture analyzer Texture quality Determination method
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A novel scaling method for the elastic ring supporting structure of an aero-engine rotor system: analytical and experimental investigations
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作者 Lei LI Tianyue MA +4 位作者 Zhong LUO Dongwu GAO Xiangdong GE Hui MA Shibin WANG 《Applied Mathematics and Mechanics(English Edition)》 2026年第1期1-18,共18页
The testing of large structures is limited by high costs and long cycles, making scaling methods an attractive solution. However, the scaling process of elastic rings introduces complexities in multi-parameter geometr... The testing of large structures is limited by high costs and long cycles, making scaling methods an attractive solution. However, the scaling process of elastic rings introduces complexities in multi-parameter geometric distortions, leading to a diminution in the predictive accuracy of the distorted similitude. To address this challenge, this study formulates a novel set of scaling laws, tailored to account for the intricate geometric distortions associated with elastic rings. The proposed scaling laws are formulated based on the intrinsic deformation characteristics of elastic rings, rather than the traditional systemic governing equations. Numerical and experimental cases are conducted to assess the efficacy and precision of the proposed scaling laws, and the obtained results are compared with those achieved by traditional methods. The outcomes demonstrate that the scaling laws put forth by this study significantly enhance the predictive capabilities for deformations of elastic rings. 展开更多
关键词 rotor system AERO-ENGINE elastic ring scaling method supporting structure
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Multiphysics Implicit Coupling Method for Fluid,Particles,and Large-Deformation Structures
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作者 Xiangxiang Wang Hualong Xie +3 位作者 Yue Yu Min Li Yubin Wang Fei Xing 《Computer Modeling in Engineering & Sciences》 2026年第2期367-401,共35页
This study presents an implicit multiphysics coupling method integrating Computational Fluid Dynamics(CFD),the Multiphase Particle-in-Cell(MPPIC)model,and the Finite Element Method(FEM),implemented with OpenFOAM,Calcu... This study presents an implicit multiphysics coupling method integrating Computational Fluid Dynamics(CFD),the Multiphase Particle-in-Cell(MPPIC)model,and the Finite Element Method(FEM),implemented with OpenFOAM,CalculiX,and preCICE to simulate fluid-particle-structure interactions with large deformations.Mesh motion in the fluid field is handled using the radial basis function(RBF)method.The particle phase is modeled by MPPIC,where fluid-particle interaction is described through momentum exchange,and inter-particle collisions are characterized by collision stress.The structural field is solved by nonlinear FEM to capture large deformations induced by geometric nonlinearity.Coupling among fields is realized through a partitioned,parallel,and non-intrusive iterative strategy,ensuring stable transfer and convergence of interface forces and displacements.Notably,the influence of particles on the structure is not direct but mediated by the fluid,while structural motion directly affects particle dynamics.The results demonstrate that the proposed approach effectively captures multiphysics interaction processes and provides a valuable reference for numerical modeling of coupled fluid-particle-structure systems. 展开更多
关键词 Fluid-particle-structure interaction large deformation partitioned method non-intrusive coupling
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Healthcare professionals’perspectives on disclosure of diagnosis and related issues in childhood cancer:A mixed methods systematic review
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作者 Run Xie Xiaoyan Huang +4 位作者 Yiran Du Ying Gu Qiongfang Kang Hongsheng Wang Daqian Zhu 《International Journal of Nursing Sciences》 2026年第1期96-104,I0006,共10页
Objectives This review aimed to systematically synthesize the available research on the disclosure of diagnosis and related issues in childhood cancer from the perspectives of healthcare professionals,with the goal of... Objectives This review aimed to systematically synthesize the available research on the disclosure of diagnosis and related issues in childhood cancer from the perspectives of healthcare professionals,with the goal of informing the optimization of disclosure processes and meeting the communication needs of affected families.Methods In accordance with the Joanna Briggs Institute(JBI)methodology for mixed methods systematic reviews,the convergent segregated approach was used in this review.Articles were retrieved from 11 databases,including PubMed,Web of Science,CINAHL,CENTRAL,Embase,Ovid/Medline,PsycINFO,PsycArticles,Scopus,ERIC,and China National Knowledge Infrastructure(CNKI).The quality of the selected articles was assessed using the Mixed Method Appraisal Tool(MMAT).The review protocol was registered on PROSPERO(CRD42024542746).Results A total of 21 studies from 10 countries were included.Their methodological quality was generally medium to high,with MMAT scores ranging from 60%to 100%.The synthesis yielded three core themes:1)the spectrum of professional and societal attitudes toward disclosure;2)the dynamic practices of navigating disclosure amid uncertainty,including timing and environment,stakeholders,and content of disclosure;and 3)factors influencing disclosure,including children’s,parental,healthcare professionals’,and socio-cultural factors.Conclusions This review synthesized the perspectives and experiences of healthcare professionals regarding disclosure in childhood cancer,highlighting the complexity and multidimensional nature of this process in clinical practice.Future research should further investigate the experiences and needs of children and their parents,explore cultural variations in disclosure practices,develop context-appropriate assessment tools,and construct multidimensional intervention strategies to enhance the humanistic care and professional effectiveness of the disclosure process. 展开更多
关键词 Communication CANCER DISCLOSURE Healthcare professionals Mixed methods PEDIATRIC Systematic review
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Investigation of equivalent strength parameters of soil-rock mixture using numerical manifold method
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作者 Junfeng Li Yongtao Yang +2 位作者 Yang Xia Hong Zheng Shuilin Wang 《Journal of Rock Mechanics and Geotechnical Engineering》 2026年第1期637-650,共14页
As binary geological media,soil-rock mixtures(SRMs)exhibit a distinct gradational composition,leading to their unique mechanical behaviors.To appraise the stability of SRM slopes,it is essential to determine equivalen... As binary geological media,soil-rock mixtures(SRMs)exhibit a distinct gradational composition,leading to their unique mechanical behaviors.To appraise the stability of SRM slopes,it is essential to determine equivalent parameters of SRMs,which are typically obtained through experimental and numerical methods.In contrasted to other numerical methods,the numerical manifold method(NMM)is more effective in addressing SRM problems.This is because the high-precision regular mathematical meshes in NMM can be used without aligning with the soil-rock interfaces and boundaries of SRMs.In the current research,the equivalent strength parameters of SRMs,i.e.the equivalent cohesion ce and internal friction angleϕ_(e),are determined using NMM.Initially,an NMM triaxial numerical model is established and validated based on triaxial experiments.Subsequently,the soil and rock parameters are derived through parameter inversion.Moreover,the impacts of rock content,size,shape and rock blocks'major-axis orientation on ce andϕ_(e) of SRMs are thoroughly examined using the NMM triaxial numerical model.Additionally,a fitting function is proposed to linkϕ_(e) to the rock content and size of SRMs.When other influencing factors are fixed,the above fitting model leads to the following conclusions:(1)the predictedϕ_(e) of SRMs increase with the increase of rock content;and(2)SRM samples with smaller rocks display a higher predictedϕ_(e). 展开更多
关键词 Soil-rock mixtures Equivalent strength parameters Numerical manifold method
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Subtitle Translation Methods of The Good Wife From Functional Equivalence Perspective
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作者 WANG Ya-kun BAO De-wang 《Journal of Literature and Art Studies》 2026年第1期26-30,共5页
The Good Wife is an American TV series that focuses on women’s independence,politics,and law.The drama has been remade in China,Japan,and South Korea.This research aims to use Nida’s Functional Equivalence Theory to... The Good Wife is an American TV series that focuses on women’s independence,politics,and law.The drama has been remade in China,Japan,and South Korea.This research aims to use Nida’s Functional Equivalence Theory to analyze the methods of its English-to-Chinese subtitle translation by considering social,cultural,and historic backgrounds between China and America.After data collection and case analysis,the study found that:(1)Five major translation methods are adopted in the subtitle translation of The Good Wife.They are free translation,variation,literal translation,addition,and omission.Among them,free translation is the most frequently used,while omission is used least.(2)The subtitle translation of films and TV series is limited by time and space restrictions,social-cultural differences,and other factors.When translating,translators should try to use humorous words,euphemism,intonation,and other ways,and combine different methods such as literal translation,free translation,variation,addition,omission,and other methods to seek equivalence both in the meaning and function of subtitles under the guidance of Functional Equivalence Theory. 展开更多
关键词 subtitle translation Functional Equivalence Theory The Good Wife translation methods
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Pile installation effects in natural soft clays:A semi-analytical solution using strain path method
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作者 Liang Li Pan Zhou +3 位作者 Jingpei Li Seyedmohsen Miraei Peng Feng Mingdong Wei 《Journal of Rock Mechanics and Geotechnical Engineering》 2026年第1期728-744,共17页
This paper develops a semi-analytical solution for pile penetration in natural soft clays using the strain path method(SPM).The stress-strain behavior of soils is characterized by the S-CLAY1S model,which can capture ... This paper develops a semi-analytical solution for pile penetration in natural soft clays using the strain path method(SPM).The stress-strain behavior of soils is characterized by the S-CLAY1S model,which can capture the anisotropic evolution and destructuring nature of soft clays.By integrating the S-CLAY1S model into the theoretical framework of the SPM,a set of ordinary differential equations is formulated with respect to the vertical coordinate of soil particles.The distribution of excess pore water pressure(EPWP)following pile installation is approximated through one-dimensional(1D)radial integration around the pile shaft.The distribution of stresses and EPWP,along with the evolution of fabric anisotropy within the soil surrounding the pile,is presented to illustrate the response of pile penetration in natural soft clays.The proposed solution is validated against existing theoretical solutions using the SPM and cavity expansion method(CEM),along with experimental data.The findings demonstrate that the SPM reveals lower radial effective stresses and EPWP at the pile shaft than that of CEM.Pile penetration alters the soil's anisotropic properties,inducing rotational hardening and affecting post-installation stress distribution.Soil destructuration eliminates bonding among particles near the pile,resulting in a complete disruption of soil structure at the pile surface,which is particularly pronounced for higher initial soil structure ratios.Minimal variation was observed in the three principal stresses and shear stress on the cone side surface as the angle increased from 18°to 60°,except for a slight reduction in EPWP. 展开更多
关键词 Pile penetration Strain path method Natural soft clays Anisotropy evolution Destructuration
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