检索结果-内蒙古大学图书馆

4th International Computational Imaging Conference, CITA 2024

作者： Deng, Dingnan Fu, Xin Wang, Chengguo Zhang, Shuiyin School of Physics and Electronic Engineering Jiaying University Meizhou514015 China Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center Meizhou514015 China

ISBN: (纸本)9781510688834

A self-supervised model based on CycleGAN is proposed to reconstruct the 3D particle fields from the unpaired data sets. The ground truth can be obtained by converting the 3D information of the particle field into a 2D grayscale image. The hologram of particles is the input of network model. A training model based on CycleGAN is designed. The unpaired data not only alleviates the pressure of data demand but also simplifies the design of the holographic device. Thus, the model training can proceed with incomplete data. With the cycle consistency of the mode, the particle characterization is more accurate. In order to assess the viability of the proposed scheme, the structural similarity (SSIM) between the reconstructed result and the ground truth is calculated. © 2025 SPIE.

关键词： 3D reconstruction

来源：评论

学校读者我要写书评

暂无评论

Simple and flexible method for measuring the liquid refractive index with an electrically tunable lens

引用

Journal of the Optical Society of America A 2025年第5期42卷 664-671页

作者： Dingnan Deng Yalin Wang Danfeng Zhu Shaobin Qiu Junbo Chen Yuanlin Liu Yuancong Zhong Jinming Luo Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas of Guangdong Province and Jiaying University School of Physics and Electronic Engineering Jiaying University Meizhou 514015 China Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center Meizhou 514015 China zsuljm@***

In the parallel-plate-based method for measuring the liquid refractive index (RI), the parallel light passes sequentially through a convex lens and a parallel plate containing the tested liquid, resulting in axial displacement of the emitted light. By moving the camera, the axial displacement caused by the introduction of the tested liquid can be obtained and used to calculate the liquid RI. To avoid the mechanical adjustment of the system, a simple and flexible method for measuring the liquid RI via an electrically tunable lens (ETL) is proposed. The convex lens is replaced with an ETL. By precisely controlling the driving current of the ETL, the focal position of the camera can remain unchanged after placing the tested liquid in the parallel plate. The focal length change, induced by variations in the driving current of the ETL, is equivalent to the axial displacement of the camera. Therefore, the RI of the liquid can be measured from the change in focal length, avoiding mechanical movement of the camera. The equivalence of the ETL is theoretically derived. The imaging characteristics of the ETL were thoroughly discussed based on Zemax simulations, validating the effectiveness of the proposed method. The experimental results of the RI for different liquids further demonstrate the validity of our proposal.

关键词： Cylindrical lenses Imaging systems Laser light Liquid lenses Michelson interferometers Refractive index

来源：评论

学校读者我要写书评

暂无评论

application of high adaptive models in building damage assessment: Case studies of earthquake in Turkey and hurricane in Louisiana

引用

Journal of Applied Remote Sensing 2025年第1期19卷

作者： Li, Pei Dong, Zhao Su, Xinyu Hu, Zhengsheng Su, Qun Wang, Huaying Zhang, Zuoheng Cao, Binghan Wang, Tao Hebei University of Engineering School of Mathematics and Physics Science and Engineering Handan China Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center Handan China Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing Handan China China Meteorological Administration National Satellite Meteorological Center National Center for Space Weather Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites Beijing China Beijing China

Rapid damage assessment after disasters is crucial for humanitarian relief and emergency response. The abrupt and unpredictable nature of disasters causes variations in the time, location, and sensors used for image collection, resulting in significant data disparities in satellite imagery. This poses a significant challenge for assessment tasks. To enable a rapid response, training models from scratch using a sufficient amount of on-site data is impractical due to time constraints. Thus, in practical applications, a model with robust adaptability and generalization is essential for autonomously adjusting to data variations. However, the majority of current models are trained and tested on a singular dataset, neglecting the aforementioned issues. To address these challenges, this study created datasets from the Turkey earthquake with large and dense building features and introduced datasets from the Louisiana hurricane with small and sparse building features. These datasets exhibit significant style differences and cover a broader range of building characteristics, providing a comprehensive evaluation of the model's adaptability. In the building damage assessment task, the model is trained on public datasets and validated using the newly introduced scenario data. Compared with existing assessment models, the U-net model demonstrates the highest adaptability performance in objectively evaluating damage levels. © 2024 Society of Photo-Optical Instrumentation Engineers (SPIE).

关键词： Emergency services

来源：评论

学校读者我要写书评

暂无评论

Measurement of liquid refractive index based on electrically tunable lens

Measurement of liquid refractive index based on electrically...

引用

2023 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display technology and applications;and Biomedical Optics, AOPC 2023

作者： Deng, Dingnan Zhang, Xiaoqian Zhang, Jingfu Tang, Haolin Ou, Ketian Lian, Hongxiu Luo, Jinming Zhong, Yuancong School of Physics and Electronic Engineering Jiaying University Meizhou514015 China Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center Jiaying University Meizhou514015 China

ISBN: (纸本)9781510672321

We present a simple and stable liquid refractive index measurement technique via electrically tunable lens (ETL). A focal point is produced when the parallel light passes through a convex lens. If a parallel plate with tested liquid is placed behind the lens, the position of focal point will be changed, which reflect the change of liquid refractive index. The axial displacement of focus point can be obtained by moving the camera and used to calculate the liquid refractive index. To avoid the mechanical movement of system, the convex lens is replaced by an electrically tunable lens. By exactly controlling the external currents of the ETL, the position of focal point can remain unchanged after placing the parallel plate with tested liquid. The change of focal length can be obtained by the change of external currents, which equal to the axial displacement of focus point. Thus, the liquid refractive index can be measured with the change of focal length. Some experiments of water, blend oil and 75% alcohol for measuring the liquid refractive index demonstrate the feasibility and effectiveness of the proposed method. © 2023 SPIE. All rights reserved.

关键词： Refractive index

来源：评论

学校读者我要写书评

暂无评论

Smartphone-based system for measuring liquid refractive index

Smartphone-based system for measuring liquid refractive inde...

引用

2023 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display technology and applications;and Biomedical Optics, AOPC 2023

作者： Deng, Dingnan Yu, Yechang Wang, Chengguo Huang, Bin Fu, Xin Zhong, Yuancong Chen, Ruikai School of Physics and Electronic Engineering Jiaying University Meizhou514015 China Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center Jiaying University Meizhou514015 China School of Computer Jiaying University Meizhou514015 China

ISBN: (纸本)9781510672321

The liquid refractive index is one of the important optical parameters reflecting the properties of solution. A simple scheme based on shading effect for measuring liquid refractive index is presented. When a light beam passes through the liquid, the total reflection occurs at the interface with the air to produce a shading effect, forming a circular shading pattern, and its radius is related to the refractive index of the liquid. Based on this principle, a liquid refractive index measurement system based on smartphone is built. A rectangle colorimetric dish with tested liquid is illuminated by He-Ne laser. A white stickable label paper is attached to one side of colorimetric dish. Then the circular shading pattern displayed on label paper can be recorded by smartphone. A smartphone data processing program was developed to calculate the liquid refractive index from the image taken by smartphone. System calibration and smartphone shooting parameters are discussed in detail. The refractive index measurement experiments of sucrose solution and sodium chloride solution with different concentrations demonstrate the feasibility and effectiveness of the proposed method. © 2023 SPIE. All rights reserved.

关键词： Smartphones

来源：评论

学校读者我要写书评

暂无评论

Structural Measurement of Cultural Relics based on 3D Scanning and Geomagic Software: Taking Ceramic Artifacts as an Example 3

Structural Measurement of Cultural Relics based on 3D Scanni...

引用

3rd International Computing Imaging Conference, CITA 2023

作者： Yang, Weizhi Deng, Dingnan Zhang, Hongfei School of Physics and Electronic Engineering Jiaying University Meizhou514015 China Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center Meizhou514015 China Lin Fengmian Academy of Fine Arts Jiaying University Meizhou514015 China

ISBN: (纸本)9781510671409

Digitization is the inevitable trend of cultural heritage protection and research, and the structural measurement of cultural relics is an important basis for three-dimensional (3D) digitization, and it is also a necessary prerequisite for other digital derivative work. Taking ceramic artifacts as an example, this paper explores the comprehensive, accurate and efficient measurement of the size of cultural relics, and realizes the comprehensive 3D digitization. The 3D data model of cultural relics was obtained by 3D scanner, and the model was processed and measured by Geomagic series software, so as to obtain the one-dimensional size parameters, overall and local area and volume information of cultural relics. The experimental results show that this method was convenient, fast and accurate, which was of great significance for understanding the structure of cultural relics, and provides a reliable basis for the comprehensive digital display and subsequent protection research of cultural relics. © 2023 SPIE.

关键词： 3D modeling

来源：评论

学校读者我要写书评

暂无评论

On-chip reconfigurable mode converter by rectangle Sb2S3 inlaid in 4H-SiC 7

On-chip reconfigurable mode converter by rectangle Sb2S3 inl...

引用

7th Global intelligent Industry Conference, GIIC 2024

作者： Zhu, Danfeng Liao, Zening Chen, Junbo Qiu, Shaobin Deng, Dingnan Ye, Han Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center School of Physics and Electrical Engineering Jiaying University Meizhou514015 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781510682986

Antimony sesquisulfide Sb2S3, an emerging low-loss phase change material, has attracted great interest for its unique properties, enabling its huge potential applications in programmable integrated optics. A reconfigurable mode converter is proposed and demonstrated numerically assisted by a rectangle Sb2S3 inlaid in a slab 4H-SiC waveguide. A three-dimension finite-difference time-domain (3D FDTD) method is employed to simulate and optimize the proposed structure. The TM0-to-TM1 mode conversion is realized with transmittances (T) of 0.91 and mode purity (MP) of 93% at the wavelength of 1550 nm in the crystalline Sb2S3 state. When the Sb2S3 is switched to the amorphous state, the mode-conversion effect disappears, and the incident TM0 mode propagates unimpededly with T > 0.99 and MP > 97.64% within the waveband from 1500 nm to 1600 nm. The nonvolatile reconfigurable mode converter can contribute to programmable photonic integrated circuits and neuromorphic optical computing. © 2024 SPIE.

关键词： Photonic integrated circuits

来源：评论

学校读者我要写书评

暂无评论

Design of an integrated reconfigurable polarization rotator based on right-angle Sb2S3inlaid in 4H-SiC

Design of an integrated reconfigurable polarization rotator ...

引用

2023 Advanced Fiber Laser Conference, AFL 2023

作者： Zhu, Danfeng Lai, Hui Chen, Junbo Qiu, Shaobin Deng, Dingnan Ye, Han Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center School of Physics and Electrical Engineering Jiaying University Meizhou514015 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781510677661

A reconfigurable polarization rotator is proposed and demonstrated numerically assisted by a right-angle Sb2S3 inlaid in a slab SiC waveguide. The crystalline Sb2S3 enables a 90° polarization rotation with transmittances (T) of -0.22 dB and polarization conversion efficiency (PCE) of 98.36% at the wavelength of 1500 nm. This rotation effect disappears with T > -0.014 dB and PCE © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Antimony compounds

来源：评论

学校读者我要写书评

暂无评论

Characterization of microlenses by transport of intensity equation 7

Characterization of microlenses by transport of intensity eq...

引用

7th Global intelligent Industry Conference, GIIC 2024

作者： Chen, Jiaxiang Zhu, Jichun Deng, Dingnan Zhong, Yuancong Chen, Yongjie Miami College of Henan University Kaifeng475004 China School of Physics and Electronic Engineering Jiaying University Meizhou514015 China Meizhou Intelligent Photoelectric Detection Application Engineering Technology Research Center Meizhou514015 China College of Physics and Optoelectronic Engineering Foshan University Foshan528225 China

ISBN: (纸本)9781510682986

We present a reflection quantitative phase measurement system via transport of intensity equation (TIE). The proposed system includes an illumination collimation module and a microscopic imaging module. LED illumination is used in illumination module to avoid the effect of speckle noise. In imaging module, the 4f imaging system is formed by a long working distance objective and a lens. The constructed system was calibrated and the actual magnification of the system was 5x for 10x objective imaging. By moving the camera, two images at different defocused distances can be recorded and used for solving TIE to retrieve the phase of tested sample. Finally, the characterization of microlenses demonstrate the effectiveness of the proposed system. © 2024 SPIE.

关键词： Microlenses

来源：评论

学校读者我要写书评

暂无评论

Fruit detection research based on near-infrared spectroscopy and lightweight neural network 5

Fruit detection research based on near-infrared spectroscopy...

引用

5th International Conference on Computer Information Science and application technology, CISAT 2022

作者： Zhang, Jinfu Tang, Bin Wang, Jianxu Cai, Linfeng Miao, Junfeng Chen, Qing Liu, Hang Mingfu, Zhao Chongqing Key Laboratory of Optical Fiber Sensing and Photoelectric Detection Chongqing400054 China Intelligent Optical Fiber Sensing Technology Chongqing University Engineering Research Center Chongqing400054 China School of Electrical and Electronic Engineering Chongqing University of Technology Chongqing400054 China

ISBN: (纸本)9781510660076

Spectroscopy is an important method in the field of nondestructive testing of fruits, and spectral pretreatment and feature screening are the difficulties and keys, which have a greater impact on the accuracy of the model, so this paper aims to use the lightweight neural network (MoblieNetV1) combined with near-infrared spectroscopy to improve the accuracy and stability of the model, reduce its computational amount, and verify its feasibility and effect. First, the fruit dataset is classified and labeled, and apples, pears, citrus, and peaches are labeled as 1, 2, 3, and 4, respectively, and then the sample spectra are put into model training in batches. MoblieNetV1 extracts features through the bottom layer, and then further extracts features at a deeper level, and finally obtains the classification of the target. Experimental results show that the moblieNetV1 used has achieved a high recognition accuracy, which is more suitable for use in the field of spectral detection than other neural networks, and avoids the cumbersome process of manually extracting features. © 2022 SPIE.

关键词： Near infrared spectroscopy

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：