Results 31 to 40 of about 16,430 (195)
YOLO-MMCE algorithm for visual detection of engineering vehicles in high-consequence area [PDF]
Objective Engineering vehicles operating on large-scale construction sites in high-consequence areas pose severe safety hazards to buried pipelines. This paper addresses the shortcomings of current common techniques for detecting overlapped targets of ...
Degang WANG +3 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT Porous NiTi alloys are widely used in biomedical and engineering fields. Using the PBF‐LB technique, the TPMS and Voronoi porous parts with a porosity of ∼67% and a minimum feature size of 0.15 ± 0.02 mm were fabricated. Although the bulk sample fabricated with the same parameters is defect‐free, μ‐CT reconstruction on the porous sample ...
Wen‐Hao Zeng +7 more
wiley +1 more source
Gaoya dianqi, 2022 作为一种新兴的环保绝缘气体，七氟异丁腈（C4F7N）因其优异的绝缘性能和远低于六氟化硫（SF6）的全球增温潜势引起了研究人员的广泛关注。在C4F7N电子碰撞截面等基础数据不完整的情况下，文中基于气体流注放电判据，提出了C4F7N-CO2混合气体有效电离反应系数的计算方法，分析了C4F7N-CO2混合气体的临界击穿场强及绝缘性能的变化规律。研究结果表明，当C4F7N气体的热化系数为1.2或1.4时，C4F7N-CO2混合气体的临界击穿场强计算值与实验数据吻合较好。此外，C4F7N ...
邓云坤 +5 more
doaj
Few-shot cybersecurity event detection method by data augmentation with prompting question answering [PDF]
The cybersecurity field lacks sufficient annotated data for event recognition, and the scenarios and semantics are complex, making it difficult to construct accurate event recognition models.
BAI Qingchun +5 more
core +1 more source
CLB-Defense: based on contrastive learning defense for graph neural network against backdoor attack [PDF]
, 2023 For the problem that the existing backdoor attack defense methods are difficult to deal with irregular and unstructured discrete graph data to alleviate the threat of backdoor attacks, a backdoor attack defense method for GNN based on contrastive ...
Haiyang XIONG +3 more
core +1 more source
Rare Metals, EarlyView.ABSTRACT This study developed a FeSiAl@LMPGP composite material to address the demand for low‐frequency electromagnetic absorption. Through controllable heat treatment, FeSiAl particles and PbO nanoparticles self‐assembled into a high‐density Mott–Schottky heterointerface structure, which exhibited a significant built‐in electric field (BIEF) effect ...
Yuqi Wang +5 more
wiley +1 more source
Research on Information Code Correction Based on Improved PPYOLOE-R [PDF]
Information-code recognition technology promotes societal progress and provides convenience. Owing to the effect of the photography environment, the information-code recognition effect must be improved, and the information-code angle tilt affects the ...
ZHAO Yuntao, XIAO Junjie, LI Weigang, XIONG Yating
core +1 more source
Rare Metals, EarlyView.ABSTRACT Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic‐scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd‐Cu nanoalloys from chemically disordered to highly ordered states by composition control and
Fan Xue +5 more
wiley +1 more source
高压组合电器中SF6分解产物SO2F2红外吸收特性及其检测传感装置研究
Gaoya dianqi, 2021 特高压硫酰氟（SO2F2）气体作为气体绝缘全封闭组合电器（GIS）气室中六氟化硫（SF6）分解产物的特征组分,对其进行检测分析可实现GIS设备的早期潜伏性故障识别。搭建光程池温度、压强可调的傅里叶变换红外吸收光谱仪（FTIR）系统,利用FTIR实验及HITRAN数据库得到的吸收谱线参数,对SO2F2气体的红外吸收谱线及其交叉干扰特性进行分析,选取中心波长2 763 cm-1位置作为SO2F2气体的特征吸收峰,并对SO2F2在该波段位置附近受温度和压强影响的红外吸收特性进行研究。结果表明 ...
张施令 +5 more
doaj
Fault diagnosis method of timing signal based on Nadam-TimeGAN and XGBoost [PDF]
In order to improve the diagnostic performance and model generalization ability of the fault diagnosis model in data imbalance scenarios, a time series signal fault diagnosis method based on Nadam-TimeGAN and XGBoost was proposed.
FEI Rong +5 more
core +1 more source