Results 31 to 40 of about 3,532 (182)
Handling imbalanced samples in landslide susceptibility evaluation [PDF]
In landslide susceptibility assessment, different approaches to handling sample imbalance can introduce significant uncertainty in evaluation outcomes.
Bo GAO +6 more
core +1 more source
Noisy voice detection algorithm based on feature stream fusion [PDF]
, 2020 Aiming at the problem that the initial detection performance of voice segment was poor,and the voice continuity structure was damaged in voice communication,a noisy voice detection algorithm based on feature stream fusion was proposed.Firstly,the time ...
Hua LONG, Mingliang YANG, Yubin SHAO
core +1 more source
Position and orientation measurement technology for bolter miner body based on dual-screen visual target [PDF]
, 2023 Aiming at the problem that it is difficult to achieve the real-time and accurate measurement of the bolter miner’s position and orientation during the excavation process in coal mines, which leads to the difficulty in achieving directional excavation, a ...
Haosen WANG +6 more
core +1 more source
基于分块图像小波相对能量和熵的视频镜头边界检测算法 [PDF]
, 2008 提出了对检测窗内图像帧进行分块并进行小波变换,计算尺度j上分块图像的低频、水平、垂直和对角信号的小波相对能量和小波熵的方法,给出了分块图像小波熵的计算公式.采用尺度j上分块图像低频信号小波熵作为特征向量检测视频镜头是否发生转换,即在检测窗内,帧间低频信号小波熵值只发生一次大突变(与设定的阈值相比)就是剪切转换,若发生多次比较大的变化就是渐变转换.采用检测窗内分块图像在尺度j上的垂直、水平和对角高频信号的小波熵作为另一特征量可以区分渐变镜头的类型:淡进/出(fadein/out)或扫换(wipe ...
戴小文, 蔡志平, 钟桂英
core
Gaoya dianqi, 2005 介绍了3种可用于定位检测GIS中SF6气体泄漏的光学成像技术。这些技术能使操作者看到泄漏气体清晰图像,快速识别泄漏源;其远距离识别和瞬时检测能力使检测者可以快速大范围地扫描GIS,泄漏能被立即识别。相对于传统的非在线检测和其它在线检测技术来说,光学成像技术在SF6气体泄漏检测方面,是一个比较大的突破。
吴变桃, 肖登明, 尹毅
doaj
基于碳烟颗粒催化氧化的三维有序大孔催化剂制备及性能 [PDF]
, 2018 三维有序大孔钴锰尖晶石催化剂（3DOMCoMn2O4）以及三维有序大孔镧、铈掺杂的钴锰尖晶石催化剂(3DOMRxCo1-xMn2O4（R=Ce, La）)由胶晶模板法成功合成。通过对所得的催化剂在NOx协助下的碳烟催化氧化活性评价,优化了Ce/Co和La/Co的配比。此外,还对目标催化剂进行了XRD、N2吸脱附、Raman、H2-TPR、SEM、XPS等表征。结果表明:3DOM结构增强了催化剂与碳烟颗粒之间的接触,对碳烟氧化等\"固-固-气\"非均相催化反应具有明显的提升作用。此外 ...
刘运权 +5 more
core
Fusion of multi-scale and context for small target detection algorithm of unmanned aerial vehicle rescue [PDF]
Aiming at the problem of insufficient feature information contained in small targets under unmanned aerial vehicle (UAV) images that led to insufficient detection accuracy of the model, a small target detection algorithm for UAV sea rescue images that ...
JIANG Guoping +4 more
core +1 more source
Gaoya dianqi, 2010 简述了现有SF6电气设备检漏技术与红外成像检漏技术的基本原理。通过详述一起SF6断路器气体泄漏的处理方法及过程,得出该仪器检测SF6气体泄漏的灵敏度高,并能准确、快速定位泄漏源,具有广泛的应用价值。
胡伟涛, 隋少臣, 韩建波
doaj
Insulator Detection Method Using YOLO Combining Feature Reuse and Reconstruction [PDF]
To overcome challenges such as low generalization performance and difficulty in identifying insulators amidst complex backgrounds in deep learning-based insulator defect detection methods, this study introduces a novel method based on the You Only Look ...
Lulu YANG, Ping MA, Cong WANG, Xinkai LI, Yue MENG, Hongli ZHANG
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Start-up and Heat Transfer Performance Test of Special-shaped Curved Titanium Water Heat Pipe Samples for Stirling Cold End [PDF]
The Stirling thermoelectric conversion system has broad prospects and can efficiently convert the heat in the reactor into electrical energy, making it an excellent solution to energy problems in current high-power space projects.
WANG Yi, ZHANG Yakun, CHAI Baohua, HAN Ye, XUE Songling, YANG Bin, WANG Chenlong
core +1 more source