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Luo, Jiangnan; Cai, Jinyu; Li, Jianping; Zhang, Deyi; Gao, Jiuhua; Li, Yuze
Applied Intelligence, 2025 55 (2) - EI SCIE

摘要 : Drilling for gas extraction, a common method in coal mine gas control, involves tedious loading and uploading of drill pipes. This study aims to design a method for detecting and measuring pose drill pipes using point cloud data. We present an experimental platform for acquiring drill pipe point cloud data under various lights. Additionally, we propose a GA-PointNet + + model, enhanced with an adversarial generation network. The pose of the drill pipe was calculated from the segmented pipe and pin point clouds. Results indicate that the intersection-over-union (IoU) values for pipe and pin, based on GA-PointNet + +, are 0.824 and 0.472, respectively. Evaluating the model's performance in recognizing the pin using the ROC curve yielded an AUC of 0.87. The combination of GA-Pointnet + + and RGB-D camera was used to pose drill pipes, achieving an average accuracy of 82.5% under different lighting conditions. Under lighting conditions of 25–35 lx with an added diffuser film and 10–15 lx, the accuracy reaches 90%, with average distance errors of 1.4 cm and 2.5 cm, and average angle errors of 3.5° and 3.7°, respectively. This has significant implications for the use of LED lights in underground environments. Therefore, the proposed drill pipe pose measurement method is of great significance for the intelligentization of coal mine drilling operations.

Gao, Weifeng; Liu, Eric H.; Yao, Olivia X. M.
RAMANUJAN JOURNAL, 2025 66 (1) - SCIE

摘要 : In 2015, Jennings-Shaffer defined the higher order SPT-functions for overpartitions \(\overline{spt}_k(n) \) and gave the combinatorial interpretation of \(\overline{spt}_k(n) \). In recent years, some congruences for \(\overline{spt}_k(n)\) have been proved. Garvan and Jennings-Shaffer presented a characterization of the parity on \(\overline{spt}_1( n)\). Motivated by their work, in this paper, we give a characterization of congruences modulo 2 on \(\overline{spt}_2( n)\) and prove a congruence modulo 4 for \(\overline{spt}_2( n)\) and several parity results for \(\overline{spt}_3( n)\) by using the generating functions of \(\overline{M}(r, 8, n) \) which denote the number of overpartitions of n whose first residual crank is congruent to r modulo 8.

Zhang, Xuejing; Zhao, Ning; Zhang, Hanqi; Fan, Yiming; Jin, Feng; Li, Chunsheng
Nano-Micro Letters, 2025 17 (1) - EI SCIE

摘要 : The metal–carbon dioxide batteries, emerging as high-energy–density energy storage devices, enable direct CO2 utilization, offering promising prospects for CO2 capture and utilization, energy conversion, and storage. However, the electrochemical performance of M-CO2 batteries faces significant challenges, particularly at extreme temperatures. Issues such as high overpotential, poor charge reversibility, and cycling capacity decay arise from complex reaction interfaces, sluggish oxidation kinetics, inefficient catalysts, dendrite growth, and unstable electrolytes. Despite significant advancements at room temperature, limited research has focused on the performance of M-CO2 batteries across a wide-temperature range. This review examines the effects of low and high temperatures on M-CO2 battery components and their reaction mechanism, as well as the advancements made in extending operational ranges from room temperature to extremely low and high temperatures. It discusses strategies to enhance electrochemical performance at extreme temperatures and outlines opportunities, challenges, and future directions for the development of M-CO2 batteries.

Chen, Zhihao; Liu, Jiahao; Min, Shuqiang; Zhan, Tonghuan; Huang, Yange; Wu, Xianchang
Microfluidics and Nanofluidics, 2025 29 (1) - EI SCIE

摘要 : Inexpensive, autonomous, easy to fabricate and portable self-powered microfluidic pumps are urgently required especially in rapid point-of-care testing (POCT). Here, we propose a "Plug-n-Play" permeable brick-based (PB) micropump for autonomous and continuous liquid flow without any external power sources. The key advantage of this pump is that its operation only requires the user to place the PB pump on the outlet of microfluidic devices. The PB pumps are fabricated by simply slicing permeable bricks into predetermined shapes. The microcosmic morphology investigations unveil that their unique porous structures and uneven surface provide outstanding capillary force. For instance, a typical cuboid PB pump (2 × 2 × 2 cm3) can produce an average flow rate of more than 100 μL min− 1, a working time of 10 min and a maximum liquid absorption volume of ~ 1200 μL. Also, the flow rate and absorption volume can be programmed by using the PB pumps with different shapes. Moreover, we apply hydrophobic reagents (Glaco) treatment on the PB pumps to achieve the control over the liquid flow rates. Finally, through applying the PB pumps, we can perform blood type detection in POC cases. Based on its advantages of low cost, long service life, and adjustable flow rates, brick pump can be easily integrated into microfluidic systems and has great potential for microfluidic applications, especially in developing regions or in resource-limited settings.

Wang, Quan; Ye, Guangfei; Chen, Qidong; Zhang, Songyang; Wang, Fengqing
Complex & Intelligent Systems, 2025 11 (1) - SCIE

摘要 : Vehicle detection and tracking from a UAV perspective often encounters omission and misdetection due to the small targets, complex scenes and target occlusion, which finally influences hugely on detection accuracy and target tracking stability. Additionally, the number of parameters of current model is large that makes it is hard to be deployed on mobile devices. Therefore, this paper proposes a YOLO-LMP and NGCTrack-based target detection and tracking algorithm to address these issues. Firstly, the performance of detecting small targets in occluded scenes is enhanced by adding a MODConv to the small-target detection head and increasing its size; In addition, excessive deletion of prediction boxes is prevented by utilizing LSKAttention mechanism to adaptively adjust the target sensing field at the downsampling stage and combining it with the Soft-NMS strategy. Furthermore, the C2f module is replaced by the FPW to reduce the pointless computation and memory utilization of the model. At the target tracking stage, the so-called NGCTrack in our algorithm replaces IOU with GIOU and employs a modified NSA Kalman filter to adjust the state-space aspect ratio for width prediction. Finally, the camera adjustment mechanism was introduced to improve the precision and consistency of tracking. The experimental results show that, compared to YOLOv8, the YOLO-LMP model improves map50 and map50:95 metrics by 10.3 and 12.2%, respectively and the number of parameters is decreased by 47.7%. After combined it with the improved NGCTrack, the number of IDSW reduced by 73.6% compared to the ByteTrack method, while the MOTA and IDF1 increase by 5.2 and 9.8%, respectively.

Wang, Aijun; Zhang, Hong; Lu, Meihua; Wang, Jinjin; Tang, Xiaoyu; Zhang, Ming
Experimental brain research, 2025 243 (1) - SCIE

摘要 : Exogenous spatial attention attenuates audiovisual integration (AVI). Previous studies on the effects of exogenous spatial attention on AVI have focused on the inhibition of return (IOR) effect induced by visual cues and the facilitation effect induced by auditory cues, but the differences between the effects of exogenous spatial attention (induced by visual and auditory cues) on AVI remain unclear. The present study used the exogenous spatial cue-target paradigm and manipulated cue stimulus modality (visual cue, auditory cue) in two experiments (Experiment 1: facilitation effect; Experiment 2: IOR effect) to examine the effects of exogenous spatial attention (evoked by cues in different modalities) on AVI. The results of Experiment 1 showed that the AVI effect at valid cue locations was significantly lower than that at invalid cue locations in both visual and auditory cue conditions, suggesting that the exogenous spatial facilitation effect evoked by both visual and auditory cues attenuated AVI. Further analysis showed that the facilitation effect induced by visual cues attenuated AVI to a greater extent than that induced by auditory cues. In Experiment 2, the AVI effect was significantly lower at valid cue locations than at invalid cue locations in the visual cue condition, whereas there was no significant difference in AVI effect between valid and invalid cue locations in the auditory cue condition, suggesting that the exogenous spatial IOR effect evoked by visual cues attenuated AVI, while the IOR effect evoked by auditory cues had no significant effect on AVI. Taken together, these results may suggest that exogenous spatial attention induced by visual cues has a greater effect on AVI than that induced by auditory cues.

Wei, Jiuyang; Zhang, Limin
The Journal of geometric analysis, 2025 35 (2) - SCIE

摘要 : This paper is concerned with the following Schrödinger-Poisson equation with zero-mass and weighted Hardy Sobolev subcritical exponent $$\begin{aligned} -\Delta u+\left( \frac{1}{4\pi }|x|^{-1} u^2\right) u=|x|^bf(u), \ \ \ \ x\in {\mathbb {R}}^{3}, \end{aligned}$$where \(-2<b<\infty \). Based on the known embedding results in Ruiz (Arch Ration Mech Anal 198:349–368, 2010) and Su et al. (Commun Contemp Math 9:571–583, 2007), we establish a new version of embedding theorem within the working space associated with the energy functional relevant to the aforementioned problem, which is different with Wang and Su (Appl Math Lett 107:106484, 2020). By combining the variational methods and some new analytical techniques, we prove the above problem admits a ground state solution of Nehari-Pohozaev type and a least energy solution under mild assumptions on f.

Lu, You; Zhang, Zhe; Xu, Xiao; Liu, Lanhui; Fu, Qiming; Chen, Jianping
Peer-to-Peer Networking and Applications, 2025 18 (1) - EI SCIE

摘要 : Topology of Internet of Things (IoT) network topologies frequently undergo dynamic changes. Thus, robust and efficient routing technology is vital for IoT system reliability and availability. Traditional wireless routing, limited by inflexible algorithms, often can't simultaneously meet multiple goals such as low energy consumption and high connectivity. With the rise of intelligent technologies, incorporating machine learning in routing optimization algorithms has become crucial. Traditional machine learning methods like neural networks, reliant on pre-trained models, face challenges adapting to fast-changing wireless network environments. In contrast, deep reinforcement learning (DRL) methods are more adept due to their online learning and decision-making capabilities. This paper presents a new DRL-based routing optimization algorithm for wireless networks, named GTD3-NET. It utilizes a deterministic policy reinforcement learning algorithm (TD3) for a robust routing framework, improving performance and DRL convergence speed. Moreover, it replaces standard neural networks with a graph neural network (GNN) for the DRL Agent, allowing better modeling of network nodes and edges and deeper insights into node relationships and network topology characteristics. The algorithm's efficacy is validated through multiple experiments, showing GTD3-NET's capability to learn optimal routing policies and perform well in new network topologies.

Ruiyu Pan; Shanjing Liu; Xingmei Guo; Zhongyao Duan; Qianqian Fan; Yuanjun Liu
Journal of Colloid and Interface Science, 2025 685 - EI SCIE
Jiahao Sha; Liling Hao; Xinyu Fang; Nianxin Zhu; Yihang Yang; Kaiming Peng
Food Control, 2025 171 - SCIE

摘要 : An enhanced pH-stable and highly sensitive electrochemical biosensor for the simultaneous detection of Cd 2+, Pb 2+, Hg 2+, and As 3+ was developed using dopamine/aptamer modified screen-printed electrodes. The aptamers of the four metal ions were initially immobilized on the surface of the corresponding working electrodes, where the specific conformation of the aptamers was induced in the presence of the toxic metal ions. Subsequently, the aptamer conformations were stabilized through electropolymerisation of dopamine, forming imprinted polymers to improve pH stability. After eluting the toxic metal ions with EDTA, the cavities left in the imprinted polymers selectively bound to the corresponding metal ions. Under optimized conditions, the developed electrochemical biosensor exhibits excellent specificity due to the specific ion conformation of dopamine imprinted polymers. Furthermore, the dopamine/aptamer imprinted polymer electrochemical sensor exhibited significantly enhanced pH stability compared to the electrochemical aptasensor, owing to the stabilization of the aptamer conformation by the imprinted polymers. The limits of detection (LOD) for the toxic metal ions were as follows: Pb 2+ (1.4 μg L− 1 ), Cd 2+ (4.0 μg L− 1 ), Hg 2+ (1.9 μg L− 1 ), and As 3+ (6.6 μg L− 1 ). The recovery rates in shredded squid and shrimp paste samples ranged from 87.5% to 108.8%, demonstrating the assay's excellent potential for the quantitative analysis of toxic metal ions in aquatic creatures.