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学者姓名：陈剑雄
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Abstract ：
Micro-polarizer array (MPA) is the core optical component of the Division of Focal-Plane (DoFP) imaging system, and its design is very important to the system's performance. Traditional design methods rely on theoretical analysis and simulation, which is complicated and requires designers to have profound theoretical foundations. In order to simplify the design process and improve efficiency, this paper proposes a 2 x 2 MPA reverse-design strategy based on particle swarm optimization (PSO). This strategy uses intelligent algorithms to automatically explore the design space in order to discover MPA structures with optimal optical properties. In addition, the all-pass filter is introduced to the MPA superpixel unit in the design, which effectively reduces the crosstalk and frequency aliasing between pixels. In this study, two MPA models were designed: a traditional MPA and an MPA with an all-pass filter. The Degree of Linear Polarization (DOLP) image contrast is used as the evaluation standard and compared with the traditional MPA; the results show that the contrast of the newly designed traditional MPA image is increased by 21%, and the MPA image with the all-pass filter is significantly increased by 82%. Therefore, the reverse-design method proposed in this paper not only simplifies the design process but also can design an MPA with enhanced optical performance, which has obvious advantages over the traditional method.
Keyword ：
DOLP image contrast DOLP image contrast MPA MPA optimizing optical performance optimizing optical performance particle swarm optimization particle swarm optimization reverse design reverse design
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| GB/T 7714 | Shi, Yonggui , Lin, Zhihai , Wang, Tianran et al. Reverse Design of Pixel-Type Micro-Polarizer Arrays to Improve Polarization Image Contrast [J]. | MICROMACHINES , 2024 , 15 (10) . |
| MLA | Shi, Yonggui et al. "Reverse Design of Pixel-Type Micro-Polarizer Arrays to Improve Polarization Image Contrast" . | MICROMACHINES 15 . 10 (2024) . |
| APA | Shi, Yonggui , Lin, Zhihai , Wang, Tianran , Huang, Chaokai , Chen, Hui , Chen, Jianxiong et al. Reverse Design of Pixel-Type Micro-Polarizer Arrays to Improve Polarization Image Contrast . | MICROMACHINES , 2024 , 15 (10) . |
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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 introduces an efficient and accurate interpolator for NURBS (non-uniform rational B-spline) curves, addressing the challenge of regulating feedrate under machining accuracy and dynamic constraints, particularly at sensitive corners. A recursive matrix representation and polynomial conversion are utilized to enhance the computation of NURBS curve intermediate points and derivatives. An improved adaptive planning method is presented to adjust the feedrate at sensitive corners, ensuring that chord error and dynamic constraints are met. The method integrates linear acceleration and deceleration stages to mitigate abrupt changes in acceleration and jerk. Additionally, a prediction-correction scheme-based interpolator is developed, employing an asynchronous mechanism to improve computational efficiency. The proposed method's effectiveness and correctness are validated through simulation tests and machining experiments.
Keyword ：
feedrate planning feedrate planning interpolation interpolation NURBS curve NURBS curve prediction-correction scheme prediction-correction scheme sensitive corner sensitive corner
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| GB/T 7714 | Huang, Zhuiliang , Chen, Jianxiong . An Interpolator for a Non-Uniform Rational B-Spline Curve with a High Efficiency and Accuracy Using Polynomial Representations [J]. | ACTUATORS , 2024 , 13 (11) . |
| MLA | Huang, Zhuiliang et al. "An Interpolator for a Non-Uniform Rational B-Spline Curve with a High Efficiency and Accuracy Using Polynomial Representations" . | ACTUATORS 13 . 11 (2024) . |
| APA | Huang, Zhuiliang , Chen, Jianxiong . An Interpolator for a Non-Uniform Rational B-Spline Curve with a High Efficiency and Accuracy Using Polynomial Representations . | ACTUATORS , 2024 , 13 (11) . |
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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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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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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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Due to its exceptional mechanical and chemical properties at high temperatures, Inconel 718 is extensively utilized in industries such as aerospace, aviation, and marine. Investigating the flow behavior of Inconel 718 under high strain rates and high temperatures is vital for comprehending the dynamic characteristics of the material in manufacturing processes. This paper introduces a physics-based constitutive model that accounts for dislocation motion and its density evolution, capable of simulating the plastic behavior of Inconel 718 during large strain deformations caused by machining processes. Utilizing a microstructure-based flow stress model, the machinability of Inconel 718 in terms of cutting forces and temperatures is quantitatively predicted and compared with results from orthogonal cutting experiments. The model’s predictive precision, with a margin of error between 5 and 8%, ensures reliable consistency and enhances our comprehension of the high-speed machining dynamics of Inconel 718 components. © 2024 by the authors.
Keyword ：
flow stress model flow stress model Inconel 718 Inconel 718 machinability machinability microstructure microstructure
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| GB/T 7714 | Yin, Q. , Chen, H. , Chen, J. et al. Microstructure-Based Flow Stress Model to Predict Machinability of Inconel 718 [J]. | Materials , 2024 , 17 (17) . |
| MLA | Yin, Q. et al. "Microstructure-Based Flow Stress Model to Predict Machinability of Inconel 718" . | Materials 17 . 17 (2024) . |
| APA | Yin, Q. , Chen, H. , Chen, J. , Xie, Y. , Shen, M. , Huang, Y. . Microstructure-Based Flow Stress Model to Predict Machinability of Inconel 718 . | Materials , 2024 , 17 (17) . |
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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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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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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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