Results 101 to 110 of about 17,971 (165)
A DC-UNet-based image processing method for detecting fractures along roadway sections of coal mines [PDF]
ObjectiveDetecting fractures along roadway sections of coal mines allows for the characterization of the geologic conditions of roadways, thus providing guidance for roadway tunneling and support engineering.
Chenhui TIAN +5 more
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Recommendation Algorithm Based on Multi-view Fusion Cross-layer Contrastive Learning [PDF]
Existing recommendation models based on graph comparison learning usually use only one view enhancement method in graph data enhancement, ignoring the limitations of a single method.
Jiajing GU, Dan YANG, Tiezheng NIE, Yue KOU
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A Temporal Densely Connected Recurrent Network for Event-based Human Pose Estimation
, 2023 Event camera is an emerging bio-inspired vision sensors that report per-pixel brightness changes asynchronously. It holds noticeable advantage of high dynamic range, high speed response, and low power budget that enable it to best capture local motions ...
Li, Youfu +4 more
core
Shuitu Baochi Xuebao, 2011 片蚀过程是坡面径流侵蚀过程的第一阶段和侵蚀方式演变的初始形态,阐明坡面片蚀过程可为坡面侵蚀过程模型建立和坡面水土流失治理提供重要科学依据。采用人工模拟降雨试验方法对黄土坡面片蚀过程进行了研究,结果表明:不同雨强及不同坡度下,坡面片蚀率皆随降雨历时的增长呈先急剧增大后趋于稳定的变化趋势,变化的转折点为产流后的5min左右;坡面片蚀模数随雨强和坡度的增大均呈显著的增加,可分别用指数方程和对数方程描述;雨强和坡度对片蚀模数的综合影响可以用二元幂函数方程描述,其中,坡度的影响大于雨强 ...
刘俊娥, 王占礼, 高素娟
doaj
Negative obstacle detection on open pit roads based on multi-feature fusion [PDF]
With the gradual implementation of intelligent mine concept, intelligence and unmanned operation are gradually implemented in mining area. Unmanned driving of open pit mine trucks is increasingly becoming the main focus of intelligent mine construction ...
Caiwu LU +3 more
core +1 more source
Jianzhu Gangjiegou Jinzhan, 2018 为研究椭圆钢管混凝土(ECFST)长柱的偏压性能,利用ABAQUS建立了偏压作用下椭圆钢管混凝土长柱的数值分析模型,考虑了钢管与核心混凝土的复杂接触问题、材料非线性问题和椭圆截面特征的影响,并利用试验结果验证了数值分析模型的准确性。对钢材强度、混凝土强度、偏心距、径厚比、长短轴比和截面面积等参数进行了分析,评价了各参数对偏压作用下椭圆钢管混凝土长柱轴压承载力的影响,揭示了其破坏模式和受力机理。研究结果表明,偏压作用下椭圆钢管混凝土长柱的破坏模式根据偏心距大小可以分为大偏压破坏和小偏压破坏 ...
於忠华, 王静峰, 沈奇罕
doaj
Discussion on Deep-Learning Strategies for Diagnosis of Multiple Diseases in Fundus Diseases [PDF]
Deep-learning algorithms can achieve the precise diagnosis of fundus diseases, which is crucial for the early diagnosis and timely intervention of these diseases.
GONG Ajuan, PAN Tianrong
core +1 more source
Dianci bileiqi, 2013 我国冬季混合凇冰灾频繁并严重威胁输电线路安全运行;覆冰后的导线表面会形成雨凇和雾凇的混合体,尖锐的冰柱会畸变冰面电场分布,进而使导线表面场强增大;为研究混合凇覆冰对导线表面场强的影响规律,在小型人工气候室内完成了对LGJ-185/25绞线混合凇覆冰后的参数测量,并根据混合凇形态建立电场分布模型,利用有限元法对导线覆冰后的表面场强进行计算。结果表明:混合凇形成的冰柱尖端会增大导线表面场强;随着覆冰程度的增加,导线表面场强会继续增大但速度却逐渐减慢并最终趋于饱和 ...
李长明 +5 more
doaj
Shuitu Baochi Xuebao, 2008 应用平衡吸附法,研究了不同pH、离子强度、温度、Cu~(2 )浓度和接触时间条件下,暗棕壤对Cu~(2 )的吸附作用,并利用热力学和动力学方程对实验结果进行了拟合。结果表明:(1)随pH提高,Cu~(2 )的吸附率增加,pH 8时的吸附率约为91%。(2)随体系离子强度增加,Cu~(2 )的吸附量先下降后增加。(3)随溶液中Cu~(2 )浓度增加,Cu~(2 )在暗棕壤上的吸附量也增加,并且在低浓度时增加比较迅速。吸附等温线可用Frendlich,Langmiur和Temkin方程很好的描述 ...
王帅 +4 more
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Gaoya dianqi, 2018 支柱绝缘子在实际运行的降雨天气下发生闪络是影响电网安全运行的重要因素。对在运行的绝缘子加装隔雨伞是最有效的提高抗雨闪能力的措施。为探究隔雨伞参数的选择方法,文中用有限元法对加装隔雨伞的一大一小伞型复合支柱绝缘子进行建模,研究隔雨伞数量和隔雨伞伸出对一大一小伞型复合支柱绝缘子电场分布的影响,提出沿面平均场强以及空气间隙场强作为2个隔雨伞参数的选择判据。结果表明:安装隔雨伞会使得隔雨伞周围大伞与小伞之间空气间隙场强变大,其自身场强相比没有加装隔雨伞时也会增大。将仿真结果进行对比后 ...
谭傲 +6 more
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