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

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Implantable neural probe with thermo-optic switches based on multimode interference (MMI) in thermogenetic application 22

Implantable neural probe with thermo-optic switches based on...

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22nd IEEE Interregional NEWCAS conference (NEWCAS)

作者： Akram, Mohammad Makhdoumi Shateri, Farshid Mohammadi, Abdolkhalegh Geravand, Alireza Shi, Wei Gosselin, Benoit Univ Laval Dept Elect & Comp Engn Quebec City PQ Canada Univ Laval Ctr Opt Photon & Lasers COPL Quebec City PQ G1V 0A6 Canada

ISBN: (纸本)9798350361766;9798350361759

This paper presents the design of an implantable neural probe with 8 optical switches that can route the beams in the different brain regions which are sensitive to near-infrared (1550 nm) for thermogenetic applications. The presented probe, which is fabricated in a standard SOI technology, can enable robust activation of neurons using thermosensitive transient receptor potential (TRP) cation channels with a higher spatial and temporal resolution, thanks to the utilization of optical switches and grating couplers with precise spot stimulation. Each optical switch is linked to a waveguide and a grating coupler, enabling simultaneous stimulation of different sites within the brain. The activation or deactivation of optical switches allows controlling passage of light through the desired waveguide to effectively providing optical stimulation to specific neurons or neural circuits. The optical switch works based on the thermo-optics effect that consists of a silicon Multimode Interference (MMI) as an optical splitter and a Titanium nitride (TiN) metal heater that is used for changing the refractive index for pi-phase shifting. The measured pi-phase shifting power was 19.8 mW with an extinction ratio of 23 dB at 1550 nm. Also, we used a TiN metal as a temperature sensor for controlling the heater. The difference in the temperature sensor impedance was 0.7 Omega when the power was applied to the heater.

关键词： Neural probe optical switch multimode interference thermogenetic

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Domain-Driven design for Microservices Architecture systems Development: A Systematic Mapping Study 11

Domain-Driven Design for Microservices Architecture Systems ...

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11th International conference in Software engineering Research and Innovation (CONISOFT)

作者： Sangabriel-Alarcon, Josue Ocharan-Hernandez, Jorge Octavio Cortes-Verdin, Karen Limon, Xavier Univ Veracruzana Fac Estadist & Informat Xalapa Veracruz Mexico

ISBN: (纸本)9798350328837;9798350328844

Domain-Driven design (DDD) is an approach that proposes to align business and technical concerns through analysis of the business domain. Microservices practitioners have adopted this approach in software development. However, there is no certainty of the patterns, techniques, and artifacts used. This study analyzes and reports the state of the literature on DDD usage for microservices-based systems development. This study is intended for practitioners and researchers on Microservice Architecture (MSA), DDD, or both. A systematic mapping study followed seven research questions as a guideline, resulting in 27 studies identified to answer the questions through data analysis and synthesis. As a summary of the findings: (i) The microservice identification through domain or legacy system decomposition is the main objective for which DDD was used. (ii) There were 31 MSA systems and 11 design artifacts related to DDD. (iii) Bounded context was the pattern most used for microservices design, followed by Entity and Aggregate. (iv) There were three technologies related to DDD applied in MSA systems design. (v) A total of six techniques used together with DDD were identified. (vi) Six limitations were reported in development descriptions. (vii) Sixteen proposals for MSA systems development with DDD were identified and grouped into five types. As a conclusion of this work, DDD allowed the authors to get a design solution driven by domain knowledge that was detailed using other artifacts, techniques, and proposals.

关键词： Domain-Driven design Microservices Architecture Microservices-based systems Development Systematic Mapping Study Systematic Review

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design of circular polarization imaging system for underwater laser gating 6

Design of circular polarization imaging system for underwate...

引用

6th conference on Frontiers in optical Imaging and Technology: Novel Imaging systems

作者： Liu, Yachao Yang, Jinbao Wei, A-Man Pan, Jianyu Yang, Chen Wang, Xiaohang Zhang, Jun National Key Laboratory of Scattering and Radiation Beijing Institute of Environmental Features Beijing100854 China

ISBN: (数字)9781510679719

ISBN: (纸本)9781510679702

At present, the strategic adjustment of global military has a common trend. With the deepening of the exploration of China's Marine, river and groundwater resources, the military demand of territorial sea sovereignty defense is becoming increasingly urgent. The realization of underwater environment survey, target detection and positioning analysis technology has become an urgent problem to be solved in underwater equipment operation in many fields. The current underwater detection technology is mainly divided into acoustic detection and optical detection. Sound detection has small underwater attenuation, wide detection range and relatively mature technology, but its imaging target identification is difficult, real-time, and is easily subject to Marine noise interference. It is difficult to fully adapt to the needs of many underwater delivery platforms and deep-sea detection operations for high resolution imaging detection, observation and positioning. The underwater photoelectric imaging technology, it has become the necessary equipment for many underwater submersible, underwater operation system and target exploration systems. The underwater laser selected circular polarization imaging system consists of selected circular polarization imaging subsystem, underwater laser radiation source, synchronous timing control subsystem, power supply, integrated display control subsystem and sealing structure. The system mainly adopts the distance selection + polarization laser imaging method, reduces the influence of backscattering on imaging quality through the underwater circular polarization laser imaging system based on distance selection, and establishes the database of the characteristics of underwater circular polarization laser imaging;on this basis, an engineering prototype is built to provide application support for target detection, identification and industrialization. © 2024 SPIE.

关键词： Underwater imaging

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Fiber-optical Measuring Networks for Hydro-engineering Facilities Security Monitoring

Fiber-Optical Measuring Networks for Hydro-Engineering Facil...

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2023 International conference "Quality Management, Transport and Information Security, Information Technologies", IT and QM and IS 2023

作者： Sedova, Nelly A. Sedov, Viktor A. Bazhenov, Ruslan I. Belozerov, Oleg I. Belozerova, Svetlana I. Lavrushina, Elena G. Maritime State University named after G.I. Nevelskoy Automatic and Information Systems Vladivostok Russia Maritime State University named after G.I. Nevelskoy Electrician Theoretical Bases Vladivostok Russia Sholom-Aleichem Priamursky State University Information Systems and Mathematics Birobidzhan Russia Far Eastern State Transport University Computer Technology and Computer Graphics Khabarovsk Russia Vladivostok State University Information Technology and System Vladivostok Russia

ISBN: (纸本)9798350340532

The paper deals with a fiber-optical tomographic problem showed for monitoring marine hydro-engineering constructions controlled by fiber-optical measuring networks comprising fiber-optical lines/links. The study presents the description of a packing diagram of fiber-optical measuring lines in three directions. The paper also illustrates the results of a mathematical calculation of recovery (backing up) of binary action performed by algebraic methods. Using such fiber-optical measuring lines is possible on surfaces with a complicated, arbitrary profile, whereas fiber-optical element/component base (software) allows using them for security monitoring of especially dangerous Class I and ii hydro-engineering constructions. © 2023 IEEE.

关键词： engineering facilities

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Learning-based Sparse Array Optimization for Dual Function Radar-communication System 15

Learning-based Sparse Array Optimization for Dual Function R...

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15th International conference on Signal Processing systems, ICSPS 2023

作者： Wang, Rui Xi, Feng Chen, Shengyao School of Electronic and Optical Engineering Nanjing University of Science and Technology China

ISBN: (纸本)9781510675056

This paper considers a multi-input multi-output (MIMO) dual functional radar communication (DFRC) system and focuses on the joint design of transmit beamforming matrix and sparse antenna array. We propose to minimize the Cramér-Rao bound (CRB) of radar sensing while preserving a predetermined level of signal-to-interference-plus-noise ratio (SINR) for the communication users. The hybrid analog-digital (HAD) beamforming technology with fewer radio-frequency (RF) chains is considered to reduce the cost of hardware system as well as to deal with the rank-deficient problem of radar sensing. Due to the complex representation of the CRB matrix, the learning-based method is proposed to simultaneously optimize the HAD beamforming matrix and antenna selection matrix. Numerical simulations are conducted to demonstrate the effectiveness of the proposed method. © 2024 SPIE.

关键词： Beamforming

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Secure energy efficient beamforming design for integrated sensing and communication 16

Secure energy efficient beamforming design for integrated se...

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16th International conference on Signal Processing systems, ICSPS 2024

作者： Zhang, Shuaijie Zhao, Yongbo Tang, Derui National Key Laboratory of Radar Signal Processing Xidian University Xi’an710071 China

ISBN: (纸本)9781510689251

This paper presents a secure energy efficient (EE) beamforming method for integrated sensing and communication (ISAC) systems. Considering the physical layer security (PLS), the radar waveform is utilized to enhance beamforming capabilities while also serving as artificial noise (AN) to disrupt potential eavesdropping. The proposed joint beamforming design aims to optimize the communication-centric EE while ensuring quality of service (QoS) for legitimate users, limiting signal-to-interference-plus-noise ratio (SINR) for potential eavesdroppers and guaranteeing the beampattern gain. For this complicated problem, it is tackled through semidefinite relaxation (SDR) and successive convex approximation (SCA) methods. Then, we prove that the relaxation of SDR remains rigorously tight in our beamforming scheme. Simulation results confirm the effectiveness of the proposed method in guaranteeing the PLS. © 2025 SPIE.

关键词： Signal to noise ratio

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Efficient and versatile 4 direction LED-based automotive lighting systems advances in optical modeling and performance predictions 14

Efficient and versatile 4 direction LED-based automotive lig...

引用

conference on optical Modeling and Performance Predictions XIV

作者： Jeong, Seok-ho Kwon, Eun-bi Hyundai Mobis Adv Lamp Engn Team 17-2Mabuk Ro 240Beon Gil Yongin 16891 Gyeonggi Do South Korea

ISBN: (纸本)9781510679184;9781510679191

Existing tail surface lighting technology is expensive and only irradiates LED light from the front, requiring multiple optical parts and air gaps for effective light diffusion. The 4FLED technology, which stands for "4 Faces LED," offers a cost-effective solution by providing 360-degree light irradiation from four directions. This reduces the need for additional optical parts and spaces, saving costs. Two wavelengths, normal red (614 nm) and super red (630 nm), are available, offering expanded choices for customers. The 4FLED system aligns with global design trends by reducing costs while maintaining high efficiency and design flexibility, appealing to many customers. It has been proven suitable for vehicles through ECE Regulation tests and high heat resistance reliability tests.

关键词： LED high-brightness automotive lamp rear signal lighting homogeneous lamp diffused module power saving function integration

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Optimal design of Heliostat Field Using Random Search Algorithm 6

Optimal Design of Heliostat Field Using Random Search Algori...

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6th IEEE International conference on Power, Intelligent Computing and systems, ICPICS 2024

作者： Mou, Chenglin Wu, Kaiqi Du, Pengcheng Yang, Kaibo School of Civil Engineering and Architecture Henan University of Science and Technology Department of Engineering Mechanics Luoyang471099 China School of Information Engineering Henan University of Science and Technology Department of Computer Science and Technology Luoyang471099 China School of Information Engineering Henan University of Science and Technology Department of Automation Luoyang471099 China School of International Education Henan University of Science and Technology Department of Civil Engineering Luoyang471099 China

ISBN: (纸本)9798350374315

Tower solar thermal power generation is a new type of low-carbon and environmentally friendly clean energy technology. In this paper, a single-objective optimization model is established with the maximum annual average thermal output per unit mirror area of the heliostat field as the objective function. By optimizing the heliostat width, heliostat height and heliostat coordinate, the annual average output thermal power can be maximized while meeting the rated power. The heliostat field is distributed in a circular shape. As the seasons change, the light intensity received by the heliostat field is uneven, so the optical efficiency of the heliostats is also different. We simplify the heliostat field into S area (area with higher optical efficiency) and W area (area with lower optical efficiency) based on the optical efficiency distribution of heliostats. At different locations, According to the heliostat width, heliostat height and heliostat coordinate generated by random functions, substituting these parameters into the efficiency model in this paper, and the random search algorithm is used to traverse the maximum annual output thermal power and the corresponding heliostat parameters. In the shadow occlusion loss model, we have grid to set up the heliostat and use the coordinate conversion to solve the shadow occlusion loss efficiency. © 2024 IEEE.

关键词： Heliostats (instruments)

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All-Reflective, Unobscured, Freeform Microscope for Biological Research: design and Fabrication

All-Reflective, Unobscured, Freeform Microscope for Biologic...

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International optical design conference 2023

作者： Peterson, Tyler Kang, Wenjun Ma, Hongzhang Liang, Rongguang Wyant College of Optical Sciences The University of Arizona 1630 E University Blvd TucsonAZ85721 United States

Dispersion in refractive lenses limits the utility of many state-of-the-art microscopes. We present the design and fabrication strategy of a true all-reflective, unobscured, freeform microscope for biological imaging ... 详细信息

ISBN: (数字)9781510668515

ISBN: (纸本)9781510668508

关键词： Microscopes

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Virtual and mixed reality tools to support the design of astronomical instrumentation in a concurrent design environment 11

Virtual and mixed reality tools to support the design of ast...

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conference on Modeling, systems engineering, and Project Management for Astronomy XI

作者： Eredia, Christian Cianniello, Vincenzo D'Auria, Domenico De Caprio, Vincenzo Cascone, Enrico INAF Osservatorio Astron Capodimonte Salita Moiariello 16 I-80131 Naples Italy Univ Napoli Federico II Dipartimento Ingn Ind DII Via Claudio 21 I-80125 Naples Italy

ISBN: (纸本)9781510675216;9781510675223

The technologies in the eXtended Reality (XR) field have been rapidly developing in the last few years, allowing for their effective implementation in many different applications, beside the entertainment world they are more commonly associated to. This paper studies the integration of virtual and mixed reality elements in a concurrent engineering environment. More specifically, eXtended Reality tools will be employed in the Concurrent design Facility that is being developed at the Capodimonte Astronomical Observatory in Naples, in the scope of the National Recovery and Resilience Plan project "STILES - Strengthening the Italian leadership in ELT and SKA". The XR environment will aid in the definition of the design, allowing the participants of a concurrent engineering session to inspect and manipulate complex 3D models, enabling detailed examinations of components, interfaces and potential issues. This immersive experience helps to identify design flaws and possible criticalities during various phases of the assembly, integration and operation of astronomical instrumentation, that would not be as easily found during a standard design review process. Other applications are also foreseen, including training of personnel for maintenance operations. The best way to properly integrate these tools in the design process, with the aim of effectively supporting the concurrent approach philosophy of effort and time efficiency is under study, as the Naples facility is built and tested in all its features and possibilities.

关键词： Concurrent design Concurrent engineering Virtual Reality Mixed Reality eXtended Reality CDF

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