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学者姓名：陈剑雄
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Abstract ：
To enhance the excavator performance considering the digging force and boom lift force under typical working conditions, this paper aims to solve the complex multiobjective optimization of the excavator by proposing a new knowledge-based method. The digging force at multiple key points is utilized to characterize the excavator's performance during the working process. Then, a new optimization model is developed to address the imbalanced optimization quality among subobjectives obtained from the ordinary linear weighted model. The new model incorporates the loss degree relative to the optimal solution of each subobjective, aiming to achieve a more balanced optimization. Knowledge engineering is integrated into the optimization process to improve the optimization quality, utilizing a knowledge base incorporating seven different types of knowledge to store and reuse the information related to optimization. Furthermore, a knowledge-based multiobjective algorithm is proposed to perform the knowledge-guided optimization. Experimental results demonstrate that the proposed knowledge-based method outperforms existing methods, resulting in an average increase of 15.1% in subobjective values.
Keyword ：
excavator excavator knowledge engineering knowledge engineering multiobjective evolutionary algorithm multiobjective evolutionary algorithm multiobjective optimization multiobjective optimization Optimization design Optimization design
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| GB/T 7714 | Lu, Zhe , Lin, Shuwen , Chen, Jianxiong et al. A multi-objective collaborative optimization method for excavator working devices based on knowledge engineering [J]. | ADVANCES IN MECHANICAL ENGINEERING , 2024 , 16 (1) . |
| MLA | Lu, Zhe et al. "A multi-objective collaborative optimization method for excavator working devices based on knowledge engineering" . | ADVANCES IN MECHANICAL ENGINEERING 16 . 1 (2024) . |
| APA | Lu, Zhe , Lin, Shuwen , Chen, Jianxiong , Gu, Tianqi , Xie, Yu , Zhao, Zihao . A multi-objective collaborative optimization method for excavator working devices based on knowledge engineering . | ADVANCES IN MECHANICAL ENGINEERING , 2024 , 16 (1) . |
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Multiple modes resonance provides the possibility of broadband filtering and has great potential applications in terahertz devices, including miniaturized spectrometers, hyperspectral imagers and optical switches in communication systems. However, it is difficult to further expand the bandwidth range due to the inability to stack an infinite number of resonant structures in a finite space. Here, an innovative method is reported for manipulating two localized surface plasmon polaritons (LSPP) modes by multiscale-coupled plasmonic fields to realize broadband filtering at terahertz (THz) frequencies. The interaction between two LSPP modes was verified theoretically and experimentally, exhibiting a prominent Rabi splitting and two peaks with high transmittance. Particularly, broadband filtering is accomplished by utilizing a double-layer structure that can be regarded as a cavity for inducing far-field interference. Experimental result demonstrates that the maximum transmission range of the bilayer metamaterial reaches 0.63 THz. Besides, the two wide bands can be integrated into one broadband through near-field coupling effects. The integration of strong coupling and far-field interference expands the transmission range of the double-layer metamaterial, further enhancing its capability for broadband filtering. This unique approach for manipulating multi-mode plasmonic coupling forges a convenient route for realizing broadband filtering.
Keyword ：
Broadband filtering Broadband filtering Far-field interference Far-field interference Multiple plasmon modes Multiple plasmon modes Strong coupling effect Strong coupling effect Terahertz metamaterials Terahertz metamaterials
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| GB/T 7714 | Zeng, Qiuming , Huang, Yi , Zhong, Shuncong et al. Manipulating multiple plasmon modes by coupling fields for broadband filtering in terahertz metamaterials [J]. | OPTICS AND LASER TECHNOLOGY , 2024 , 168 . |
| MLA | Zeng, Qiuming et al. "Manipulating multiple plasmon modes by coupling fields for broadband filtering in terahertz metamaterials" . | OPTICS AND LASER TECHNOLOGY 168 (2024) . |
| APA | Zeng, Qiuming , Huang, Yi , Zhong, Shuncong , Shi, Tingting , Chen, Jianxiong , Zhong, Yujie et al. Manipulating multiple plasmon modes by coupling fields for broadband filtering in terahertz metamaterials . | OPTICS AND LASER TECHNOLOGY , 2024 , 168 . |
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针对传统实验教学中存在以认知体验为主、缺乏连贯层次化设计和过度依赖实验报告等问题，以装备设计制造能力培养为导向，融合基于模型设计(MBD)、虚实结合的机电概念设计(MCD)、制造执行系统MES等理念方法，建立以项目式学习为驱动的层次递进式实验教学构架，改革现有专业课程实践知识体系，培养能够解决复杂工程问题的高质量机械工程人才。通过持续实践，取得了明显的成效。
Keyword ：
OBE OBE 实验教学体系 实验教学体系 装备设计制造 装备设计制造 项目式学习 项目式学习
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| GB/T 7714 | 陈晖 , 陈剑雄 , 黄惠 . 基于3M-PBL-OBE的机械工程实验教学体系改革与实践 [J]. | 中国现代教育装备 , 2024 , 4 (09) : 128-130,134 . |
| MLA | 陈晖 et al. "基于3M-PBL-OBE的机械工程实验教学体系改革与实践" . | 中国现代教育装备 4 . 09 (2024) : 128-130,134 . |
| APA | 陈晖 , 陈剑雄 , 黄惠 . 基于3M-PBL-OBE的机械工程实验教学体系改革与实践 . | 中国现代教育装备 , 2024 , 4 (09) , 128-130,134 . |
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Silicon carbide (SiC) is extremely hard and brittle, posing challenges for traditional abrasive machining. This study used molecular dynamics simulations to investigate synchronous versus asynchronous force -torque effects on SiC abrasive machining. Multi-grit diamond abrasion of 4H-SiC was modeled by applying controlled sinusoidal forces and torques. Asynchronous force -torque increased material removal rates up to 2X versus synchronous conditions by promoting particle agglomeration and enabling trapped particles to contribute. However, asynchronous operation also produced higher surface roughness and subsurface cracking from greater penetration. The alternating forces generated larger stresses that may have driven more plastic deformation and brittle fracture. The study provided atomic-scale insights into force -torque effects, establishing guidelines to potentially enhance efficiency through asynchronous operation despite drawbacks.
Keyword ：
Abrasive machining Abrasive machining Force -torque synchronization Force -torque synchronization Molecular dynamics Molecular dynamics Silicon carbide Silicon carbide
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| GB/T 7714 | Chen, Hui , Wang, Chengxin , Chen, Jianxiong et al. Changing torque-force synchronization condition for abrasive particle improves material removal during silicon carbide abrasive machining [J]. | TRIBOLOGY INTERNATIONAL , 2024 , 192 . |
| MLA | Chen, Hui et al. "Changing torque-force synchronization condition for abrasive particle improves material removal during silicon carbide abrasive machining" . | TRIBOLOGY INTERNATIONAL 192 (2024) . |
| APA | Chen, Hui , Wang, Chengxin , Chen, Jianxiong , Xie, Yu , Sun, Kailin , Huang, Yuhua et al. Changing torque-force synchronization condition for abrasive particle improves material removal during silicon carbide abrasive machining . | TRIBOLOGY INTERNATIONAL , 2024 , 192 . |
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This paper proposed a method to measure the rolling angle for carrots. An imaging system was designed to capture the image of the cross-section located on the root-stem junction. The outer profile curve (OPC) of the cross-section was extracted and transformed into polar coordinates with the centroid serving as the origin. And a one-to-one correspondence between its polar angle and polar radius was established. Then an improved cyclic shift method (ICSM) was proposed. The ICSM was developed based on the consistent angular spacing between any two points on OPC throughout the rolling process. This addressed the issue of low efficiency. Furthermore, the additional requirements for calculation were pointed out. Finally, an experiment was conducted to measure the rolling angle of 60 carrot samples. The results show that the proposed method exhibits high accuracy and high efficiency. It provides an effective tool for full-surface image acquisition of carrots.
Keyword ：
Carrot Carrot Computer vision Computer vision Improved cyclic shift method Improved cyclic shift method Non-rotational symmetry Non-rotational symmetry Rolling angle measurement Rolling angle measurement
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| GB/T 7714 | Shen, Zhenhui , Zheng, Shuhe , Chen, Jianxiong et al. Rolling angle measurement for carrots using computer vision and improved cyclic shift method [J]. | MEASUREMENT , 2024 , 235 . |
| MLA | Shen, Zhenhui et al. "Rolling angle measurement for carrots using computer vision and improved cyclic shift method" . | MEASUREMENT 235 (2024) . |
| APA | Shen, Zhenhui , Zheng, Shuhe , Chen, Jianxiong , Ren, Jinbo , Mulowayi, Arcel Mutombo . Rolling angle measurement for carrots using computer vision and improved cyclic shift method . | MEASUREMENT , 2024 , 235 . |
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This paper presents a mask-less, flexible, efficient, and high-resolution fabrication method for non-periodic microstructures. Sub-wavelength micro-polarizer arrays, (MPAs) which are the most essential part of the focal plane polarimeters, are typical non-periodic structures. The grating ridges of each polarizer were oriented in four different directions offset by 45 degrees, corresponding to different polarization directions. The finite element method was introduced to optimize the structural parameters of the MPA in the far-infrared region. The numerical results demonstrated that the designed MPA had a TM transmittance of more than 55% and an extinction ratio no less than 7 dB. An aluminum MPA that operates in the 8-14 mu m infrared region was prepared by one-step two-photon lithography (TPL) and the metal lift-off process. The femtosecond laser exposed the photoresist with only a single scan, making TPL very efficient. The fabricated single-layer sub-wavelength MPAs with a period of 3 mu m, a duty cycle of 0.35-0.5, and a height of 150 nm, were analyzed by an optical microscope and an atomic force microscope. The successful fabrication of the MPA indicated that one-step TPL could be a viable and efficient method for pattern preparation in the fabrication of non-periodic microstructures. (c) 2023 Optica Publishing Group
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| GB/T 7714 | Xie, Yu , Chen, Jianxiong , Xu, Hang et al. Efficient fabrication method for non-periodic microstructures using one-step two-photon lithography and a metal lift-off process [J]. | APPLIED OPTICS , 2023 , 62 (5) : 1221-1229 . |
| MLA | Xie, Yu et al. "Efficient fabrication method for non-periodic microstructures using one-step two-photon lithography and a metal lift-off process" . | APPLIED OPTICS 62 . 5 (2023) : 1221-1229 . |
| APA | Xie, Yu , Chen, Jianxiong , Xu, Hang , Zhang, Yujie , Chen, Quancheng . Efficient fabrication method for non-periodic microstructures using one-step two-photon lithography and a metal lift-off process . | APPLIED OPTICS , 2023 , 62 (5) , 1221-1229 . |
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To improve the fabrication efficiency of the two-photon polymerization (TPP) laser direct writing, the TPP exposure process was set to complete by a single-line scan, which was named 2D TPP. The voxel of the 2D TPP should be large enough to cross the photoresist and the underlayer. To explore the resolution limit of the 2D TPP considering the thickness of the photoresist, a new method named the 45 degrees scanning method was proposed. Meanwhile, a two-photon micro-nano fabrication platform was developed. A group of experiments based on the orthogonal decomposition method was carried out to analyze the width and length of the voxel on the S1805 photoresist under different laser power and processing speed. To confirm whether the resolution of the micro-nano structures fabricated by 2D TPP is consistent with the width of the voxel, aluminum wire grids were fabricated through the 2D TPP and the metal lift-off process. A second-order regression equation of the machining resolution and input parameters of the 2D TPP is deduced. The correlation coefficient between the width of the voxel and the aluminum wire grids is 0.961, which means a significant positive correlation between them. Finally, the second-order regression model derived from the fabrication resolution of the 2D TPP was validated by experiments. Full 2D grids were fabricated using 2D TPP and mental lift-off process. This paper provides a convenient, low-cost, and high-efficiency method for calibrating the fabrication resolution of 2D TPP on various photoresists.
Keyword ：
2D two-photon polymerization 2D two-photon polymerization 45 degrees scanning method 45 degrees scanning method high aspect ratio voxel high aspect ratio voxel laser direct writing laser direct writing resolution calibration resolution calibration
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| GB/T 7714 | Xie, Yu , Chen, Yixiong , Xu, Hang et al. A Calibration Method for the Resolution of 2D TPP Laser Direct Writing [J]. | MICROMACHINES , 2023 , 14 (1) . |
| MLA | Xie, Yu et al. "A Calibration Method for the Resolution of 2D TPP Laser Direct Writing" . | MICROMACHINES 14 . 1 (2023) . |
| APA | Xie, Yu , Chen, Yixiong , Xu, Hang , Chen, Jianxiong . A Calibration Method for the Resolution of 2D TPP Laser Direct Writing . | MICROMACHINES , 2023 , 14 (1) . |
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Melt electrospinning writing is a new and promising method for fabricating micro/nanofibers, which has shown great prospects in the biomedical fields such as 3D printing of porous scaffolds. The diameter of the melt electrospinning writing fiber can determine the resolution of the microstructure; thus, the controllability of the fiber diameter is of great significance to the whole fabrication process. In this paper, an orthogonal design experiment (six factors, three levels) was used to explore the impacts of six melt electrospinning parameters (melt temperature, collector speed, tip-to-collector distance, melt flow rate, voltage, and needle gauge) on the fiber diameter. In this experiment, the diameter of fibers obtained with the designed experimental parameters and conditions varied from 10.30 & mu;m to 20.02 & mu;m. The range analysis of orthogonal test results showed that the melt flow rate was the most important factor influencing the diameter of melt electrospinning writing fiber, while the voltage was the least influential factor. The variance analysis of orthogonal test results showed that melt temperature, collector velocity, tip-to-collector distance and melt flow rate had a significant influence on the diameter of melt electrospinning writing fiber. On the basis of the first-order regression equation, the fiber diameter of poly-& epsilon;-caprolactone can be accurately controlled, thus improving the engineering applications of poly-& epsilon;-caprolactone.
Keyword ：
3D printing 3D printing melt electrospinning writing melt electrospinning writing orthogonal design orthogonal design polymer polymer
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| GB/T 7714 | Xie, Yu , Fang, Qi , Zhao, Han et al. Effects of Six Processing Parameters on the Size of PCL Fibers Prepared by Melt Electrospinning Writing [J]. | MICROMACHINES , 2023 , 14 (7) . |
| MLA | Xie, Yu et al. "Effects of Six Processing Parameters on the Size of PCL Fibers Prepared by Melt Electrospinning Writing" . | MICROMACHINES 14 . 7 (2023) . |
| APA | Xie, Yu , Fang, Qi , Zhao, Han , Li, Yang , Lin, Zhihai , Chen, Jianxiong . Effects of Six Processing Parameters on the Size of PCL Fibers Prepared by Melt Electrospinning Writing . | MICROMACHINES , 2023 , 14 (7) . |
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| GB/T 7714 | Zhu, Zhaoju , He, Bingwei , Chen, Jianxiong . 撤稿声明: Evaluation of tool temperature distribution in MQL drilling of aluminum 2024-T351 (Retraction of Vol 56, Pg 757, 2020) [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2023 , 93 : 287-287 . |
| MLA | Zhu, Zhaoju et al. "撤稿声明: Evaluation of tool temperature distribution in MQL drilling of aluminum 2024-T351 (Retraction of Vol 56, Pg 757, 2020)" . | JOURNAL OF MANUFACTURING PROCESSES 93 (2023) : 287-287 . |
| APA | Zhu, Zhaoju , He, Bingwei , Chen, Jianxiong . 撤稿声明: Evaluation of tool temperature distribution in MQL drilling of aluminum 2024-T351 (Retraction of Vol 56, Pg 757, 2020) . | JOURNAL OF MANUFACTURING PROCESSES , 2023 , 93 , 287-287 . |
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The optical path error, the position-independent geometric error, and the form and position tolerance of the substrate will lead to position deviations of the laser focus resulting in the inconsistency of the large area microstructure and limiting the processing range of the femtosecond laser fabrication platform. To realize continuous defocus compensation along the processing trajectory, an autofocus scheme consisting of an optimized depth from focus (DFF) method based on grid division and the bilinear interpolation algorithm is proposed in this paper. The optimized DFF method includes the Laplace-DWT evaluation function combining the advantages of spatial domain and frequency domain sharpness evaluation function, an adaptive focusing window selection method, and an adaptive step length three-step hill-climbing search method. The optimized DFF method was used to obtain the best focus position of each grid point. Compared with the traditional DFF method, the optimized algorithm has higher focusing precision and avoids the disadvantage of time-consuming focusing. Then, to compensate for interpolating points of the processing trajectory, the bilinear interpolation algorithm was introduced to achieve online focusing during two-photon lithography processing. Finally, the feasibility and effectiveness of the auto-focusing scheme were validated by experiments. Through defocus compensation, the sharpness evaluation value of the focus image on the processing trajectory improved by 90%, which indicated the successful focus of the laser beam on the workpiece surface. Moreover, a high-precision and large-area encoded micro-polarizer array with consistent structure were fabricated successfully. This paper provides a simple way to identify and compensate the defocus errors online with high accuracy and efficiency. The proposed method can improve the machining accuracy and quality of the femtosecond laser direct writing.
Keyword ：
Bilinear interpolation Bilinear interpolation Defocus compensation Defocus compensation Depth from focus Depth from focus Femtosecond laser Femtosecond laser Laplace-DWT sharpness evaluation function Laplace-DWT sharpness evaluation function
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| GB/T 7714 | Xie, Yu , Lin, Zhihai , Yu, Gaowen et al. Defocus compensation scheme for femtosecond laser direct writing of large-area non-periodic micro-structures [J]. | OPTICS AND LASERS IN ENGINEERING , 2023 , 172 . |
| MLA | Xie, Yu et al. "Defocus compensation scheme for femtosecond laser direct writing of large-area non-periodic micro-structures" . | OPTICS AND LASERS IN ENGINEERING 172 (2023) . |
| APA | Xie, Yu , Lin, Zhihai , Yu, Gaowen , Chen, Hui , Chen, Jianxiong . Defocus compensation scheme for femtosecond laser direct writing of large-area non-periodic micro-structures . | OPTICS AND LASERS IN ENGINEERING , 2023 , 172 . |
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