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学者姓名：李劲林
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Abstract ：
To investigate the mechanism of aquatic pathogens in quorum sensing (QS) and decode the signal transmission of aquatic Gram-negative pathogens, this paper proposes a novel method for the intelligent matching identification of eight quorum signaling molecules (N-acyl-homoserine lactones, AHLs) with similar molecular structures, using terahertz (THz) spectroscopy combined with molecular dynamics simulation and spectral similarity calculation. The THz fingerprint absorption spectral peaks of the eight AHLs were identified, attributed, and resolved using the density functional theory (DFT) for molecular dynamics simulation. To reduce the computational complexity of matching recognition, spectra with high peak matching values with the target were preliminarily selected, based on the peak position features of AHL samples. A comprehensive similarity calculation (CSC) method using a weighted improved Jaccard similarity algorithm (IJS) and discrete Frechet distance algorithm (DFD) is proposed to calculate the similarity between the selected spectra and the targets, as well as to return the matching result with the highest accuracy. The results show that all AHL molecular types can be correctly identified, and the average quantization accuracy of CSC is 98.48%. This study provides a theoretical and data-supported foundation for the identification of AHLs, based on THz spectroscopy, and offers a new method for the high-throughput and automatic identification of AHLs.
Keyword ：
Gram-negative pathogens Gram-negative pathogens molecular dynamics simulation molecular dynamics simulation quorum signaling molecules quorum signaling molecules spectral similarity calculation spectral similarity calculation terahertz spectroscopy terahertz spectroscopy
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| GB/T 7714 | Zhang, Lintong , Kong, Xiangzeng , Qu, Fangfang et al. Comprehensive Similarity Algorithm and Molecular Dynamics Simulation-Assisted Terahertz Spectroscopy for Intelligent Matching Identification of Quorum Signal Molecules (N-Acyl-Homoserine Lactones) [J]. | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2024 , 25 (3) . |
| MLA | Zhang, Lintong et al. "Comprehensive Similarity Algorithm and Molecular Dynamics Simulation-Assisted Terahertz Spectroscopy for Intelligent Matching Identification of Quorum Signal Molecules (N-Acyl-Homoserine Lactones)" . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 25 . 3 (2024) . |
| APA | Zhang, Lintong , Kong, Xiangzeng , Qu, Fangfang , Chen, Linjie , Li, Jinglin , Jiang, Yilun et al. Comprehensive Similarity Algorithm and Molecular Dynamics Simulation-Assisted Terahertz Spectroscopy for Intelligent Matching Identification of Quorum Signal Molecules (N-Acyl-Homoserine Lactones) . | INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES , 2024 , 25 (3) . |
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Abstract ：
针对PCB表面电子元器件尺寸跨度大、种类多样、小尺寸元器件特征相似等检测难题,本文以YOLOv8算法为基线模型,提出一种DCW-YOLOv8算法.首先在C2f模块中嵌入可变形卷积DCNv2,扩大感受野,更好地提取不同尺寸、不同形状的电子元器件特征;其次设计了 C-PANet颈部网络结构,该结构引入CARAFE上采样算子,同时构建跨尺度特征拼接通道,兼顾特征细节信息与特征感受范围,提高特征融合能力;最后将WIoU作为边界框损失函数,提高模型对电子元器件的定位精度与收敛速度.实验结果表明,DCW-YOLOv8算法在自建PCB电子元器件数据集检测中mAP@0.5达到94.7％,相比于YOLOv8n提升2.1％,并且计算量仅为8.1GFLOPs,保证了检测效率与精度.
Keyword ：
YOLOv8 YOLOv8 可变形卷积 可变形卷积 损失函数 损失函数 特征融合 特征融合 电子元器件 电子元器件
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| GB/T 7714 | 李劲林 , 龚浩宇 . 面向PCB电子元器件的DCW-YOLOv8检测算法 [J]. | 小型微型计算机系统 , 2024 , 45 (10) : 2479-2484 . |
| MLA | 李劲林 et al. "面向PCB电子元器件的DCW-YOLOv8检测算法" . | 小型微型计算机系统 45 . 10 (2024) : 2479-2484 . |
| APA | 李劲林 , 龚浩宇 . 面向PCB电子元器件的DCW-YOLOv8检测算法 . | 小型微型计算机系统 , 2024 , 45 (10) , 2479-2484 . |
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磁流变弹性体在智能缓冲减振等技术领域具有广阔的应用前景.文中利用硅橡胶和羰基铁粉在预结构化条件下制备了各向异性的磁流变弹性体,设计了磁流变弹性体压缩性能测试励磁装置,并采用有限元方法对其磁场分布进行了仿真优化,使弹性体测试区间磁场强度水平方向均匀度小于0.1,竖直方向均匀度小于0.15.最后,在不同励磁电流条件下,采用不同压缩速率对安装在该励磁装置中的不同厚度的磁流变弹性体分别进行了压缩性能测试.结果表明,由于磁场耦合效应,随着厚度的增加,磁致压缩模量从0.08 MPa上升到0.44 MPa再下降到0.05 MPa,磁流变效应从3.98％上升到25.73％再下降到2.82％,呈现先增加后减小的趋势;随着励磁电流的增大,基体中磁性颗粒间相互作用能增大,使得磁流变弹性体的磁致压缩模量随着磁场强度的增强从0.11 MPa增加到0.44 MPa,且应变越大,磁致压缩模量的增幅越明显;磁流变弹性体的压缩模量随压缩速率的增大而增大,且应变和励磁电流越大,压缩速率对压缩模量增强效果越显著.
Keyword ：
压缩模量 压缩模量 硅橡胶基 硅橡胶基 磁流变弹性体 磁流变弹性体 磁流变效应 磁流变效应
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| GB/T 7714 | 白通 , 梁伟 , 钟舜聪 et al. 硅橡胶基磁流变弹性体的压缩力学性能 [J]. | 高分子材料科学与工程 , 2024 , 40 (11) : 87-95 . |
| MLA | 白通 et al. "硅橡胶基磁流变弹性体的压缩力学性能" . | 高分子材料科学与工程 40 . 11 (2024) : 87-95 . |
| APA | 白通 , 梁伟 , 钟舜聪 , 顾立勋 , 李劲林 . 硅橡胶基磁流变弹性体的压缩力学性能 . | 高分子材料科学与工程 , 2024 , 40 (11) , 87-95 . |
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Dynamic characteristics play a crucial role in evaluating the performance of weight sensors and are essential for achieving fast and accurate weight measurements. This study focuses on a weight sensor based on optical coherence displacement. Using finite element analysis, the sensor was numerically simulated. Frequency domain and time domain dynamic response characteristics were explored through harmonic response analysis and transient dynamic analysis. The superior dynamic performance and reduced conditioning time of the non-contact optical coherence-based displacement weight sensor were confirmed via a negative step response experiment that compared the proposed sensing method to strain sensing. Moreover, dynamic performance metrics for the optical coherence displacement-type weight sensor were determined. Ultimately, the sensor's dynamic performance was enhanced using the pole-zero placement method, decreasing the overshoot to 4.72% and reducing the response time to 0.0132 s. These enhancements broaden the sensor's operational bandwidth and amplify its dynamic response capabilities.
Keyword ：
displacement type displacement type dynamic characteristics dynamic characteristics optical coherence optical coherence weight sensor weight sensor
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| GB/T 7714 | Lai, Zhengchuang , Ouyang, Zhongjie , Zhong, Shuncong et al. Dynamic Characterization of Optical Coherence-Based Displacement-Type Weight Sensor [J]. | SENSORS , 2023 , 23 (21) . |
| MLA | Lai, Zhengchuang et al. "Dynamic Characterization of Optical Coherence-Based Displacement-Type Weight Sensor" . | SENSORS 23 . 21 (2023) . |
| APA | Lai, Zhengchuang , Ouyang, Zhongjie , Zhong, Shuncong , Liang, Wei , Yang, Xiaoxiang , Lin, Jiewen et al. Dynamic Characterization of Optical Coherence-Based Displacement-Type Weight Sensor . | SENSORS , 2023 , 23 (21) . |
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