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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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Configurable Slit Unit versus Slit Mask Exchanger Trade Study for the TMT Wide Field optical Spectrometer 11

Configurable Slit Unit versus Slit Mask Exchanger Trade Stud...

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

作者： Heptonstall, Alastair W. Andersen, David Skidmore, Warren Nash, Reston Fucik, Jason Steidel, Charles Peng, Eric W. Jacoby, George Miles, John TMT Int Observ 100 W Walnut StSuite 300 Pasadena CA 91124 USA CALTECH 1200 E Calif Blvd Pasadena CA 91125 USA Natl Opt Infrared Astron Res Lab 950 N Cherry Ave Tucson AZ 85719 USA

ISBN: (纸本)9781510675216;9781510675223

We present details of the recent trade study on design changes to the Wide Field optical Spectrometer (WFOS) for the Thirty Meter Telescope (TMT)[1]. WFOS is planned as a first light instrument and will provide highly efficient imaging and multi-slit spectroscopy over the wavelength range 0.31 to 1 mu m across a field of view of 8.3 by 3 arcminutes. The existing baseline prior to the trade study used a laser cut metal slit mask at the focal plane to enable observation of similar to 50 to 80 objects simultaneously. The masks would be cut in advance of observing and installed in a cassette, allowing a mechanism to select the mask and move it into place at the focal plane. Each multi-object observation requires a dedicated mask, with a more general single long slit mask remaining in the cassette permanently. The configurable slit unit (CSU) is an alternative approach, and a design that has previously been used in MOSFIRE and FORS. A CSU uses multiple knife edges mounted on computer-controlled bars to create and position slits at the focal plane. In the case of WFOS the CSU will be capable of creating 96 separate slits with the ability to reconfigure them on the fly to adapt to seeing conditions or to respond to targets of opportunity. We detail here the decision criteria, design, and science case analysis used by the WFOS team to decide to change the baseline design of WFOS to incorporate a CSU.

关键词： TMT WFOS Wide Field Spectrograph Configurable Slit Unit Slit mask

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An Investigation of the Synthesis and optical Properties of a Novel Ag/ZnO Hybrid Nanofluid for Spectral Splitting in Photovoltaic-Thermal systems 36

An Investigation of the Synthesis and Optical Properties of ...

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36th International conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy systems, ECOS 2023

作者： Chougule, Sandesh S. Bolegave, Gaurav G. Soni, Bhaskar Pander, Chandan Kamble, Vinayak Markides, Christos N. Laboratory Department of Chemical Engineering Imperial College London LondonSW72AZ United Kingdom School of Physics Indian Institute of Science Education and Research Kerala Thiruvananthapuram695551 India Department of Physics Faculty of Science The Maharaja Sayajirao University ofBaroda Gujrat Vadodara390002 India

ISBN: (纸本)9781713874928

The deficient utilisation of the solar spectrum in conventional hybrid concentrating photovoltaic-thermal (CPV-T) technologies leads to a detrimental decrease in PV efficiency due to elevated temperatures. Solar spectral beam splitting (SBS) is an advancement in PV-T system design" which aims to use the full solar spectrum with minimal optical losses. The implementation of fluid-based SBS designs is economically feasible, with optical features that can be tuned by selecting suitable nanofluids with a desired concentration. Fluid-based SBS filters are advantageous over other filters for PV-T systems due to their ability to operate simultaneously as thermal storage as well as heat transfer media in these systems. In the present study, we report on the optical and thermophysical properties of a novel water-based Ag-ZnO hybrid nanofluid. The filter is synthesised by adding Ag to ZnO nanoparticles by a wet chemical method for improved stability. Silver (Ag) allows visible light harvesting (down conversion of UV to the visible region of the solar spectrum) and good optical properties in the visible and near-IR regions. An Ag shell can be embedded into the core of zinc oxide (ZnO) nanoparticles for improved stability. The presence of ZnO enables excellent optical properties, including high visible transmittance and high UV absorption. The presence of structural defects in ZnO induces colour centres which are deep traps emitting in the visible. Ag-ZnO nanofluids with different nanoparticle concentrations were tested to measure absorbance and transmittance using UV spectroscopy. These nanofluid filters can be used for full spectrum utilisation (by SBS) which helps in achieving: (i) down conversion in the UV region, (ii) transmit visible and near IR (NIR) region (desired wavelength of Si PV cell optoelectronic efficiency) and (iii) absorb (filter) the IR region of the solar spectrum (for downstream thermal use/applications). © (2023) by ECOS 2023 All rights reserved.

关键词： ii-VI semiconductors

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IBM Telum ii Processor design-Technology Co-Optimizations for Power, Performance, Area, and Reliability 72

IBM Telum II Processor Design-Technology Co-Optimizations fo...

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72nd IEEE International Solid-State Circuits conference, ISSCC 2025

作者： Wolpert, David Strevig, Gerry Berry, Chris Sigal, Leon Huott, Bill Cichanowski, Mark Pflanz, Matthias Werner, Tobias Salz, Philipp Jinq, Nick Romain, Michael Leefken, Iris Serton, Richard Veerabhadraiah, Rajesh Chidambarrao, Dureseti Arelt, Robert Angyal, Matt Trombley, Ben Haran, Arvind Hougardy, Stefan Klotz, Ben Rao, Rahul IBM PoughkeepsieNY United States IBM AustinTX United States IBM Yorktown HeightsNY United States IBM Böblingen Germany IBM Bangalore India University of Bonn Bonn Germany

ISBN: (纸本)9798331541019

The IBM zNext's Telum ii processor [1] is a full-stack overhaul of its predecessor [2], featuring a modified 5nm Samsung bulk technology [3], new IBM-created standard cell and IP libraries, and a variety of further design-technology co-optimizations (DTCO). While die size grew from 530mm2 to 600mm2 (1.13×), each chip in the dual-chip module became denser, featuring 1.3T shapes (1.25×), 43B transistors (1.38×), and 38km of wire (1.28×) across 18 BEOL layers. As IBM's first 5nm processor, Telum ii was a concurrent hierarchical design effort, with libraries, IP blocks (array / regfile / analog / phy / custom), and all gatelevel entities designed simultaneously. These data volume and concurrent design pressures drove a variety of abstraction, modeling, and other EDA innovations in addition to those involving power, performance, area, and reliability targets. © 2025 IEEE.

关键词： Digital storage

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Alignment of Korsch telescope using laser radar-measured optical axis of aspheric primary mirror 15

Alignment of Korsch telescope using laser radar-measured opt...

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conference on optical System Alignment, Tolerancing, and Verification XV

作者： Ryu, Dongok Kim, Goeun Choe, Jongguk Heo, Haeng Pal Korea Aerosp Res Inst 169-84 Gwahak Ro Daejeon 34133 South Korea

ISBN: (纸本)9781510679269;9781510679276

Precise alignment in Korsch telescopes is crucial due to the complex design and intricate aspheric primary mirror. Conventional alignment methods using wavefront sensors often encounter difficulties with obstructions from secondary components, leading to potential inaccuracies and suboptimal solutions. This study introduces a novel alignment methodology utilizing laser radar technology and an integrated metrology system to capture the three-dimensional surface profile of the aspheric primary mirror and other components. The methodology includes strategic placement of multiple laser radars and additional laser trackers and autocollimators for comprehensive measurement and continuous monitoring. This approach significantly reduces alignment errors, enhances precision, and accelerates the alignment process. The results show that deviations of main mirrors under varying gravity conditions closely match finite element analysis, validating the robustness of the alignment in zero-gravity environments. The ability to detect and compensate for gravitational effects ensures optimal performance, highlighting the effectiveness of the proposed methodology. This research presents a significant advancement in optical engineering, providing a reliable and efficient alignment technique for complex optical systems.

关键词： Korsch telescope Laser radar measurement Integrated metrology system Aspheric mirror measurement optical axis precision

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Estimation of the Degrees of Tilt of the Upper Body Postural Body Axis Using optical Motion Analyzer 13

Estimation of the Degrees of Tilt of the Upper Body Postural...

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Joint 13th International conference on Soft Computing and Intelligent systems and 25th International Symposium on Advanced Intelligent systems, SCIS and ISIS 2024

作者： Yamada, Shota Nagamune, Kouki Inoue, Taisei Kubota, Masafumi Matsuo, Hideaki Graduate School of Engineering University of Fukui Fukui Japan University of Fukui Hospital Division of Physical Therapy and Rehabilitation Medicine Fukui Japan Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Faculty of Health Sciences Kanazawa Japan

ISBN: (纸本)9798350373332

In recent years, the number of hemiplegia patients due to stroke has been increasing. Scaling for Contraversive Pushing (SCP) is a method to evaluate the severity of the stroke. In this evaluation method, it is important to quantify the body axis tilt numerically. In this study, we measured and analyzed the Side Tilt Angle of the upper body posture using an optical motion analyzer, and aimed to visualize the severity of postural localization disorder caused by body axis tilt. First, an angular accuracy experiment I was conducted for a parameter indicating Side Tilt Angel that was set. Then, an experiment ii was conducted to compare the posture of a normal subject with eyes open and eyes closed. The error of Side Tilt Angle accuracy was within ±5.0 [degrees], and the standard deviation was within ±1.0 [degrees]. The results of the comparison experiment showed that no changes occurred between open and closed eye postures for the healthy subjects. In addition, a program was developed to separate the coordinates that were switched when two persons were captured, enabling the system to separate them. The development of this system is expected to increase the effectiveness of rehabilitation for hemiplegia. © 2024 IEEE.

关键词： Motion estimation

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design Spectra for Intermediate Isolation systems: Closed-Form Relationship Based on Application of Pole Allocation Method 18th

Design Spectra for Intermediate Isolation Systems: Closed-Fo...

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18th World conference on Seismic Isolation, Energy Dissipation, and Active Vibration Control of Structures, WCSI 2023

作者： Esposito, Francesco Faiella, Diana Ikeda, Yoshiki Mele, Elena Department of Structures for Engineering and Architecture University of Naples Federico II Piazzale Tecchio 80 Naples80125 Italy Disaster Prevention Research Institute Kyoto University Uji Japan

ISBN: (纸本)9783031668876

In this paper, closed-form expressions are derived for tracing some displacement spectra to be used for the preliminary design of Intermediate Isolation System (iiS), with specific reference to the case of iiS obtained through isolated vertical extension of existing buildings. The so-called Intermediate Isolation System (iiS) design spectrum provides the drift in the lower structure varying the isolation period, thus allowing for identifying the design solution that maximizes the mass damping effect on the lower structure. The iiS design spectrum is derived by means the pole allocation method applied to two-degree-of-freedom model. Indeed, using the pole allocation method, it is possible to obtain the value of the modal damping ratios in closed form for non-classically damped systems, such as iiS. Known such modal damping ratios, it is possible to apply the CQC modal superposition method in response spectrum analysis, thus obtaining the iiS design spectrum. Similarly, it is possible to obtain the isolators displacement spectrum, to determine the design displacement of the isolation devices, which implicitly considers both the mass damping effect and the flexibility of the lower structure. Finally, the lower structure and isolator responses derived from these design spectra for iiS are compared with the ones obtained from linear time history analyses. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Damping

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Phase Change Material-Based Cooling systems Subject to Periodic Heating: Lumped Analysis and Experimental Verification 22

Phase Change Material-Based Cooling Systems Subject to Perio...

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22nd InterSociety conference on Thermal and Thermomechanical Phenomena in Electronic systems, ITherm 2023

作者： Mirza, Shahzeb Amon, Cristina H. Chandra, Sanjeev University of Toronto Department of Mechanical and Industrial Engineering Toronto Canada

ISBN: (纸本)9798350321661

Phase change material (PCM) based thermal man-agement systems have seen significant attention in the literature to dampen thermal oscillations in applications with transient heat loads. Developing reliable engineering design rules for these systems has proven difficult due to the complexity of the moving boundary and phase change process. However, it is simpler to analyze PCM-based systems where the internal thermal gradients are significantly smaller than external thermal gradients, i.e., 'lumped' systems with low Biot numbers (mathbf{Bi © 2023 IEEE.

关键词： Thermoelectric equipment

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Porting and driver design for embedded Linux device camera 3

Porting and driver design for embedded Linux device camera

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3rd International conference on Intelligent Mechanical and Human-Computer Interaction Technology, IHCIT 2024

作者： Song, Zilong Huang, Xiaoxia Shanghai Maritime University Shanghai201306 China

ISBN: (纸本)9781510683105

This article delves into the technical essentials of porting and developing CSI interface camera drivers in embedded Linux systems. It begins by comprehensively and deeply exploring the principles of camera controller driver under the V4L2 video capture framework. Subsequently, the article elaborately describes the design strategies of camera drivers. Following that, successful porting of the OV2640 camera with CSI interface was achieved on the NXP ***6ULL development board, and image capture and video acquisition tasks were smoothly executed. Through careful examination of image attributes, it was confirmed that the captured images fully met the predetermined performance standards. © 2024 SPIE.

关键词： Linux

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Automated Configuration of Optimized Customer Specific Mechatronic systems Using Behavior Models 17

Automated Configuration of Optimized Customer Specific Mecha...

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17th CIRP conference on Intelligent Computation in Manufacturing engineering, CIRP ICME 2023

作者： Stegmaier, Valentin Eberhardt, Tobias Schaaf, Walter Jazdi, Nasser Weyrich, Michael Verl, Alexander University of Stuttgart Nobelstraße 12 Stuttgart70569 Germany Institute of Industrial Automation and Software Engineering University of Stuttgart Pfaffenwaldring 47 Stuttgart70569 Germany Institute for Control Engineering of Machine Tools and Manufacturing Units University of Stuttgart Seidenstraße 36 Stuttgart70174 Germany J. Schmalz GmbH Johannes-Schmalz-Straße 1 Glatten72293 Germany

The diversity of component manufacturers' product portfolios is often one of their greatest assets, as it allows them to offer appropriate solutions to a wide variety of customers. However, this diversity is also one of the greatest challenges, as it often makes it nearly impossible to design an optimal mechatronic system by manually selecting components. This is where the Digital Twin of the components can help. By providing behavior models and relevant information, existing optimization algorithms can be used to optimize for system-relevant key performance indicators enabling an automated system design process. The method presented in this paper is validated for a vacuum gripping systems. © 2024 Elsevier B.V.. All rights reserved.

关键词： Smart manufacturing

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A Type-ii Fuzzy Logic Fault Detection Strategy design of Electro-Mechanical Flight Actuators 43

A Type-II Fuzzy Logic Fault Detection Strategy Design of Ele...

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43rd Chinese Control conference, CCC 2024

作者： Yang, Zhenshu Mao, Qi Li, Xiaoyu Shen, Baoguo Aeronautical Engineering Institute Jiangsu Aviation Technical College Zhenjiang Key Laboratory of Uav Application Technology Jiangsu212000 China Nanjing Normal University School of Electrical and Automation Engineering Nanjing China Jiangsu Key Laboratory of 3D Printing Equipment & Manufacturing Nanjing China

ISBN: (纸本)9789887581581

In this paper, we focus on the design of fault detection strategies for electro-mechanical flight actuators (EMFA) exhibiting strong nonlinearities and uncertain disturbances. We start by building a description of the EMFA dynamics, along with allowing for the effects of system nonlinearities and unknown disturbances. We next construct the system perturbation approximators from the type-ii fuzzy logic system (FLS), which is capable of yielding effective estimates of the system's nonlinear terms and unknown disturbances. In the subsequent step, the resulting estimation errors are incorporated into the fault detection routine to recognize whether or not a fault exists in the EMFA. The stability analysis demonstrates that the perturbation approximator errors are amenable to converge within a small domain around zero. Finally, the effectiveness of the proposed fault detection strategy is confirmed by numerical simulations and discussions. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Control nonlinearities

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