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检索条件"任意字段=Conference on Design and Engineering of Optical Systems II"

共 20637 条记录，以下是581-590 订阅

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Masked coherent diffractive imaging with ADMM-based phase retrieval

Masked coherent diffractive imaging with ADMM-based phase re...

引用

Biomedical Imaging and Sensing conference 2023

作者： Song, Li Lam, Edmund Y. Department of Electrical and Electronic Engineering The University of Hong Kong Pokfulam Hong Kong

ISBN: (纸本)9781510663435

The use of prior knowledge is important for effective phase retrieval in biological imaging using coherent light. We design a new algorithm based on alternating direction method of multipliers (ADMM), where physical constraints in the imaging system are used as prior knowledge. Experimental results where we apply the method on a masked coherent diffractive imaging (CDI) system show the efficiency of our algorithm. © 2023 SPIE.

关键词： Imaging systems Coherence imaging Phase retrieval optical coherence Biological imaging design and modelling Diffraction Prior knowledge Matrices Reconstruction algorithms

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Research on the equivalence principle and module design of erasure code based on multi tenants

Research on the equivalence principle and module design of e...

引用

2024 International conference on Optics, Electronics, and Communication engineering, OECE 2024

作者： Sun, Jing Department of Intelligent Science and Information Law East China University of Political Science and Law Shanghai201620 China

ISBN: (纸本)9781510685437

Erasure coding technology can reduce costs, improve data reliability, and enhance the usefulness of the system. This technology has been widely designed and used in distributed storage systems. However, in the case of multi-tenancy, none of the popular distributed storage systems support user-level flexible and configurable encoding modules. To solve the problem that the cost and reliability cannot be controlled by custom encoding parameters, the proof of equivalence principle under different code construction schemes is provided, and then the erasure encoding module under multi-tenancy is designed. This module allows a flexible selection of stripe ratio parameters and code algorithms, and data conversion under different algorithms. Based on the generator polynomial, the code library is provided which is optimized by avx2 instruction sets. Compared with the open-source generator matrix-based code solution, the library can resist silent errors. Finally, the analysis and evaluation of the throughput performance of the three code libraries that support avx2 instruction sets is provided. The experiment results show that ISA-L library could maintain high encoding throughout with the growth of the size of the stripe. The design of the flexible erasure code module under multi-tenancy environment has filled the gap of the distributed storage system in the refined control of cost and reliability. © 2024 SPIE.

关键词： Encoding (symbols)

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Docker-based satellite network simulation platform 3

Docker-based satellite network simulation platform

引用

3rd International conference on Computer Technology, Information engineering, and Electron Materials, CTIEEM 2023

作者： Chen, Kuayue Fu, Lianpeng School of Electronic and Information Engineering Beijing Jiaotong University Beijing China

ISBN: (纸本)9781510672925

In modern communication systems, satellite networks play a crucial role in providing global coverage and high-speed data transmission. Traditional network simulation tools face challenges such as high complexity, poor scalability, and inadequate performance, making them unsuitable for simulating satellite networks. To gain a better understanding of satellite network performance and operation, this paper introduces a Docker-based satellite network simulation platform. This platform simulates satellite constellation link establishment rules and uses Docker to construct satellite network topologies, automating snapshot switching, link simulation, satellite communication, and other functions. The platform provides an experimental environment for the design, optimization, and performance evaluation of satellite communication systems, aiding researchers in gaining deeper insights into the operation and performance characteristics of satellite networks. © 2024 SPIE.

关键词： Simulation platform

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Progress and Reflection of Learning Factory 14th

Progress and Reflection of Learning Factory

引用

14th International conference on Learning Factories (CLF)

作者： Wang, Kaifeng Wang, Lei Yu, Wenqiang He, Fang Ren, Shuhan Gu, Peihua Tianjin Univ Sch Mech Engn Tianjin Peoples R China Int Inst Innovat Design & Intelligent Mfg Tianjin Shaoxing Zhejiang Peoples R China Zhongzhi Coll Robot & Smart Mfg Engn Ningbo Peoples R China

ISBN: (纸本)9783031653995;9783031654008

Learning factory, as an education model oriented to the real-life factory environment, can provide on-the-job learning opportunities and practical engineering experiences for learners and trainees. The rapid development of artificial intelligence such as Generative Pre-trained Transformers and the shift from Industry 4.0 to Industry 5.0 raise more complex and varying demands on engineers' ability to innovate. To handle these technological advancements and deployments, technical employees of an enterprise need continuously learning and upgrading for new knowledge and skills. The design and operation of the future learning factories need to consider these changes to ensure sustained operation. This paper reports the progresses of Phase I and the design of Phase ii of Smart Manufacturing and Innovation Learning Factory. Phase I has an area of 4,000 square meters in a four-story building. A total of more than 800 people have been trained in the last three years at the Phase I facility mainly for pre-job and on-job training. The experiences and reflections of Phase I are discussed. The design concepts and development strategies of Phase ii are articulated to facilitate the future integrated learning and training of process learning, project learning, problem learning, and digital learning to meet the training demands for supporting digital transformation. The future developments of learning factories in Industry 5.0 era are also briefly discussed.

关键词： Learning Factory Competency Development Manufacturing Education

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Vectorial Micro Scanning Mirror for Fast Beam Positioning of a Compact Medical Therapy Laser 23

Vectorial Micro Scanning Mirror for Fast Beam Positioning of...

引用

conference on MOEMS and Miniaturized systems XXiiI

作者： Sandner, Thilo Grasshoff, Thomas Schwarzenberg, Markus Birnbaum, Klemens Puegner, Tino Grahmann, Jan Fraunhofer Inst Photon Microsyst IPMS Maria Reiche Str 2 D-01109 Dresden Germany

ISBN: (纸本)9781510670594;9781510670587

Miniaturized vectorial beam steering mirrors are required in numerous applications like (i) LIDAR, (ii) diagnostic imaging or (iii) miniaturized therapeutic laser systems. In this article we present a new type of electrostatically driven vectorial (2D quasi-static) MEMS scanning mirror with monolithic integrated position sensors. The vectorial MEMS scanner was specially optimized for the requirements of a compact therapeutic photocoagulation laser system for the treatment of retinal eye diseases. This requires a highly miniaturized MEMS scanning system for fast and precise vectorial beam positioning of the treatment laser with a positioning time of <= 5 ms. The quasi-static 2D drive of the presented 2D MEMS scanning mirror is based on electrostatic vertical comb actuators in combination with a non-cardanic suspension of the 2.2 mm circular mirror plate. To measure and control the actual beam position piezoresistive position sensors are monolithically integrated into the MEMS design. The MEMS scanner was designed for a quasi-static (mechanical) 2D tilt angle of +/- 2 degrees for both scan axes each in two frequency variants with 714 Hz and 1 kHz at 70 V and 130 V drive voltage, respectively. For high laser powers of > 1.5 W (average power) at 519 nm wavelength, highly reflective optical coatings based on a symmetric HRC design of enhanced (hybrid) Al with R >= 98 % are used.

关键词： MOEMS 2D vector scanning mirror 2D quasi-static beam steering mirror monolithic integrated position sensing high reflective optical coating miniaturized therapeutic laser

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design and simulation of a multifunctional care bed 3

Design and simulation of a multifunctional care bed

引用

3rd International conference on Advanced Manufacturing Technology and Manufacturing systems, ICAMTMS 2024

作者： Huang, Jinlong Ye, Nan Xu, Runkang Chen, Junchao Xie, Yuchen Zheng, Zhaoxuan Zhong, Weibo College of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang212100 China Atmospheric and Oceanic Information System Co. Ltd. Nanjing211100 China Ocean College Jiangsu University of Science and Technology Zhenjiang222100 China

ISBN: (纸本)9781510681804

As the aging of the population intensifies, how to better care for bedridden elderly or patients with physical disabilities has become an urgent issue. This paper focuses on the design of a multifunctional care bed, which can help patients realize functions such as back elevation, leg bending, turning, toileting, and bathing. First of all, we designed the overall structure of the care bed to ensure the realization of each function. Then, the care bed model was built by using SOLIDWORKS, and the dynamic analysis and mechanical analysis of the care bed mechanism were carried out by using this model. According to the dynamic analysis, we obtained the motion change curve of the care bed under different functions. we conducted a finite element analysis of the important mechanisms of the care bed, and tested the strength of its parts. The results show that each mechanism operates stably and the experimental value is much smaller than the yield strength of the material. Consequently, it could meet the design requirements and bring convenience to the people. © 2024 SPIE.

关键词： design Kinematics 3D modeling SolidWorks Motion models Modeling Motion analysis Safety Compliance Mechanical engineering

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Shielding design and optimization of vehicle mounted nuclear power supply for heat pipe reactor

Shielding design and optimization of vehicle mounted nuclear...

引用

2023 International conference on Computer Application and Information Security, ICCAIS 2023

作者： Tan, Zhiyu Chen, Ling Chen, Liangping Ma, Tianci China Academy of Atomic Energy Sciences Beijing China

ISBN: (纸本)9781510675032

The optimization design of shielding for on-board nuclear power supplies is a multi-parameter and multi-objective optimization problem, and the design of key parameters such as shielding layer material and size has an important impact on meeting the requirements of miniaturization, lightweight, and mobility of on-board nuclear power supplies. Using the elite strategy of the Non-Dominated Sorting Genetic Algorithm ii (NSGA-ii), with the overall objective of optimizing the total mass and dose rate of the shielding layer, the radiation shielding design scheme under operation and transportation conditions is given. The analysis results show that the mass and radial dose of the radial optimization scheme obtained in this paper are 78.08% and 52.47% of the initial scheme, respectively, while the mass and dose values of the axial optimization scheme are 83.52% and 78.39% of the initial scheme, and meet the mass and dose limits. The NSGA-ii algorithm is used to adaptively optimize the key parameters such as material and size of the shielding system for on-board nuclear power supplies, and a shielding optimization scheme with light weight and small volume is obtained. This can provide theoretical and technical support for the optimization design of radiation shielding for on-board nuclear power supplies. © 2024 SPIE.

关键词： Genetic algorithms

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Integrated waveform design of radar-communication based on Gurobi 4

Integrated waveform design of radar-communication based on G...

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4th International conference on Advanced Manufacturing Technology and Electronic Information, AMTEI 2024

作者： Shen, Dong Tan, Xin Wang, Jiahao Xu, Haobo School of Electronic and Information Engineering Lanzhou Jiaotong University Gansu Lanzhou730070 China

ISBN: (数字)9781510688247

ISBN: (纸本)9781510688230

A low-complexity scheme based on Gurobi is proposed to address the problem of high complexity of waveform design solution algorithms in dual-functional radar-communication (DFRC) systems. Firstly, a DFRC system is constructed, and the objective function for minimizing downlink multi-user interference (MUI) energy is designed. Subsequently, the aforementioned non-convex quadratic constrained programming problem is addressed using Gurobi, a global solver for large-scale optimization. Finally, the results of the simulation experiments demonstrate that, under identical signal-to-noise ratio (SNR) conditions, the proposed scheme achieves a higher total transmission rate and significantly reduced complexity compared to the benchmark algorithms. Additionally, it effectively performs radar target detection concurrently with data communication within the DFRC system. © 2025 SPIE.

关键词： Signal to noise ratio

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Fourth International conference on Advanced Optics and Photonics Research in engineering, AOPR 2024

Fourth International Conference on Advanced Optics and Photo...

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4th International conference on Advanced Optics and Photonics Research in engineering, AOPR 2024

ISBN: (纸本)9781510682610

The proceedings contain 36 papers. The topics discussed include: a driving waveform based on releasing charges to suppress ink film splitting for electrowetting displays;research and design of the angle sensor based on optical arm amplification;radio spectra research of compact objects sample;research and application of oil-free screw compressor in low-pressure exhaust gas recovery from coal to ethylene glycol production;spinning rate function with higher-order-continuity for robust circular SOP conversion in SQWP;simplified Volterra series based nonlinear equalization for IM/DD systems;research on China’s mandatory technical rules based on big data and coping measures of domestic and foreign detector industry enterprises;an automatic calibration method for multi-channel photoresistive detection module;research on kinematic calibration algorithm for a Stewart platform;design and development of real-time acquisition and analysis system for electrical parameters of human acupuncture points;a study on the challenges and possible solutions in developing a robust infrastructure for charging electric vehicles;and study on the impact of external damping on the vibration reduction effect of locally resonant metamaterial.

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Research on the design and construction of urban landscape ecological environment monitoring platform under distributed verification technology 3

Research on the design and construction of urban landscape e...

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3rd International conference on Electronic Information engineering and Data Processing, EIEDP 2024

作者： Rao, Jian Fang, Tianci Han, Xinyun Digital Art Industry College Hubei University of Technology Hubei Wuhan China College of Art and Design Hubei University of Technology Hubei Wuhan China

ISBN: (纸本)9781510680531

Existing environmental monitoring systems mostly adopt hierarchical centralized management methods, forming data islands. In terms of management and monitoring, human control factors are high, causing the ecological environment monitoring platform to fall into difficulties such as low data credibility, no traceability, and low security. Distributed ledger technology, as one of the core technologies of the blockchain, can disperse the confirmed data among multiple nodes for simultaneous consensus and give it a timestamp. It ensures the traceability and decentralization of data and avoids the occurrence of data islands and unreliable data during the environmental monitoring process. Combined with the characteristics of distributed ledger technology such as traceability, decentralization, non-tamperability, and openness, we explore its role in the ecological environment monitoring platform from various aspects such as environmental quality monitoring, resource management, behavioral supervision and restraint, and energy usage monitoring. feasibility, and pointed out the risks and challenges faced by distributed ledger technology in the application of ecological environment monitoring platforms. Assist in the design and construction of ecological environment monitoring platforms in the digital era. © 2024 SPIE.

关键词： Hierarchical systems

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