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检索条件"任意字段=8th Conference on Current Developments in Optical Design and Optical Engineering"

共 294 条记录，以下是161-170 订阅

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Modelling a 1.25 Gb/s optical transmitter in IEEE 1076.1 standard VHDL-AMS

Modelling a 1.25 Gb/s optical transmitter in IEEE 1076.1 sta...

引用

15th IEEE Canadian conference on Electrical and Computer engineering

作者： Youssef, A Elmasry, M Univ Waterloo VLSI Grp Waterloo ON Canada

ISBN: (纸本)0780377818

the need for simulation models that are reliable and able to predict the conceptual as well as the implementation errors early in the design process is a must in the current tight time to market constrains. In this paper a model for a 1.25 Gb/s fiber channel transmitter is presented. the model is implemented using the IEEE 1076.1 standard VHDL-AMS. the modelled system is composed of two sections;an analog section, comprising the laser diode and the laser driver, and a digital section, consisting of an 8B/10B encoder and a 10:1 multiplexer.

关键词： optical communication systems fiber channel models

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Recent developments in timber-concrete composite construction 8th

Recent developments in timber-concrete composite constructio...

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8th International conference on Structural engineering, Mechanics and Computation (SEMC)

作者： Holschemacher, K. HTWK Leipzig Struct Concrete Inst Leipzig Germany

ISBN: (纸本)9781003348450;9781032391144

Composite members combining the beneficial properties of different building materials become increasingly important in civil engineering. Whereas steel-concrete composite has been an often-applied method in construction practice for many decades, timber-concrete composite (TCC) was a less preferred technology in past. Nowadays, situation is changing because of the obvious advantages that TCC offers in respect of environmental issues. Especially, TCC slabs are a recognized construction method, meanwhile. the paper reports the state-of-the-art and recent developments in TCC. Advantages of the application of steel fibre reinforced concrete (SFRC) for the construction of the concrete slab are discussed. Furthermore, the construction process for strengthening of existing timber beam ceilings with TCC and application of precast TCC members is reported. An increasing application of TCC in construction practice may be expected because of their lower environmental impact in comparison to other usual floor constructions. this tendency is supported by future normative regulations enabling the easy calculation of mechanical properties of shear connectors.

关键词： Concrete slabs

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Detection Method of Abnormal Operation State of Electrical Equipment Based on PLC Technology 8

Detection Method of Abnormal Operation State of Electrical E...

引用

8th International conference on Energy System, Electricity, and Power, ESEP 2023

作者： Gao, Li Liaoning Vocational University of Technology Liaoning China

ISBN: (数字)9781510679801

ISBN: (纸本)9781510679795

At present, the detection nodes of abnormal operation state of electrical equipment are mostly set as independent structures, and the detection range of operation state is small, which leads to the increase of false detection times. therefore, the design and verification analysis of abnormal operation state detection method of electrical equipment based on PLC technology are proposed. According to the current test requirements and the changes of standards, firstly, the characteristics of abnormal detection of electrical equipment are extracted, and the actual operating state detection range is expanded by multi-objective method, and multi-objective dynamic detection nodes are deployed. Based on this, the abnormal operating state detection model of PLC electrical equipment is constructed, and the abnormal detection of equipment is realized by two-stage cross-correction. the final test results show that the final number of false detections can reach more than 20 times for the selected eight electrical equipments, which shows that with the help of PLC technology, the designed method for detecting abnormal operation state of electrical equipment is more efficient and stable, and has practical application value. © 2024 SPIE.

关键词： optical instruments

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the 2005 AISC Seismic provisions

The 2005 AISC Seismic provisions

引用

8th US National conference on Earthquake engineering 2006

作者： Malley, J.O. Degenkolb Engineers 225 Bush Street San Francisco CA 94104 United States

ISBN: (纸本)9781615670444

the American Institute of Steel Construction (AISC) document "Seismic Provisions for Structural Steel Buildings", has become the reference document for seismic design of steel structures throughout the United States. Since its initial publication in 2000, the International Building Code has incorporated these provisions by reference. Since their 1997 publication, the AISC Seismic Provisions have been updated on a regular basis in order to incorporate new developments from the FEMA/SAC project on moment frames and other work in this area. the latest revision culminated in 2005 with the publication of a completely new set of provisions that is in the same unified format as the main AISC design specification. In addition, this edition adds two new structural systems (Buckling Restrained Braced Frames and Steel Plate Shear Walls) and makes reference to a new AISC standard for the pre-qualification of seismic moment connections that was also completed in 2005. Major improvements to the quality control sections, based on FEMA 353, are also included for the first time. Coordinated efforts between AISC, ASCE-7 and the Building Seismic Safety Council (BSSC) will continue the process of keeping the seismic design provisions for structural steel buildings as current as possible. this paper will summarize the changes incorporated into the 2005 AISC Seismic Provisions and the use of the new moment connection pre-qualification standard.

关键词： Seismic design

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the optimization of technology ITO layers for thin-film solar cells 14

The optimization of technology ITO layers for thin-film sola...

引用

14th International conference on Advanced Trends in Radioelecrtronics, Telecommunications and Computer engineering (TCSET)

作者： Khrypunov, G. Sokol, E. Kudii, D. Khrypunov, M. Natl Tech Univ Kharkov Polytech Inst Kharkov Ukraine

ISBN: (纸本)9781538625569

the fulfilled optimization of ITO films for their using in the effective CdS/CdTe base solar cell design allowed to establish, that maximum figure of merit (8,0.10(-4) Ohm(-1)) is characteristic for the layers deposited at the substrate temperature 400 degrees C. the optimization of the layer optical and electrical properties is ensured by the top main charge carrier mobility mu=44 cm(2)/(V.s) and the maximum transmittance of heterosystcm ITO/Poly in the visible range T400-800 = 0.61.

关键词： ITO films solar cell visible range substrate temperature direct current magnetron sputtering

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Using optical diagnostics for near field blast testing 8th

Using optical diagnostics for near field blast testing

引用

8th International conference on Structural engineering, Mechanics and Computation (SEMC)

作者： Langdon, G. S. Curry, R. J. Rigby, S. E. Pickering, E. G. Clarke, S. D. Tyas, A. Gabriel, S. Yuen, S. Chung Kim von Klemperer, C. J. Univ Sheffield Dept Civil & Struct Engn Sheffield S Yorkshire England Univ Cape Town BISRU Dept Mech Engn Rondebosch South Africa Univ Cape Town Dept Mech Engn Rondebosch South Africa

ISBN: (纸本)9781003348443

the ability to measure the structural and material response to air-blast loading is vital to developing a proper understanding of near-field blast loading and response. Computational modelling has advanced significantly but, until recently, experimental techniques lagged behind. this paper discusses recent advances in these experimental techniques. the first part describes a bilateral test programme between the UK and South Africa. the high-speed imaging and digital image correlation system at Cape Town gives repeatable and accurate impulse distributions across a central strip of a panel, useful for model validation. Flexural wave behaviour was observed from the transient velocity and displacement profiles, giving good insights into the mechanics of plate response from blast loads. the second part demonstrates the value of high-speed stereo-imaging for measuring the transient response of blast loaded fibre reinforced polymer panels and sandwich structures. the peak displacements. elastic rebounds and transient oscillations provide valuable insights into the damage propagation within these types of structures. the final part of the paper describes some of the continued developments since the success of those early trials, resulting in a new optical diagnostics for blast capability at the University of Sheffield. the imaging system operates at higher frame rates and can cover a wider region of interest on the structure. Ultra-high speed imaging is also shown to be a useful tool for visualising detonations fronts in explosive charges and the expanding fireball.

关键词： Fiber reinforced plastics

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design and implementation of HDL modules and circuits for underwater optical wireless communication

Design and implementation of HDL modules and circuits for un...

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作者： Anguita, Davide Brizzolara, Davide Parodi, Giancarlo University of Genova Department of Biophysical and Electronic Engineering Via Opera Pia 11A Genova Italy

ISBN: (纸本)9789549260021

Underwater wireless optical communication has been used for establish a link between mobile vehicles and/or fixed nodes because light, especially in the blue/green region, allows to achieve higher data-rate than acoustical or electromagnetic waves for moderate distances. the here proposed work has the aim to pave the way for diffuse optical communication allowing to support optical communication in an Underwater Wireless Sensor Network of dense-deployed fixed nodes for specific application, such as monitoring and surveillance, for shallow, coastal and inland water in the case of moderate/limited area. the use of light impulse for communication is motivated by the possibility of targeting high data-rate, low-cost and small dimension components. this paper describes an overall vision of the system: a HDL implementation of flexible modules for the management of optical communication (based on IEEE 802.15.4 and IEEE 802.11 standard) which target the interface with current terrestrial technology for Wireless Sensor Networks;the design and implementation of circuits for underwater optical point-to-point and planar communication. the preliminary results and design consideration are reported considering also future possible developments.

关键词： optical communication

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design of adjustable voltage power supply based on Buck 8

Design of adjustable voltage power supply based on Buck

引用

8th International conference on Energy System, Electricity, and Power, ESEP 2023

作者： Wang, Cuixia Zhou, Geng Luo, Yiming Hu, Yubin Chen, Yanke Cao, Zihan Wang, Yan CSSC Haiwei High-tech Co. Ltd. Guangzhou China

ISBN: (数字)9781510679801

ISBN: (纸本)9781510679795

To meet the supply voltage of some Marine equipment related performance test, the power supply is designed with wide threshold adjustable value. In DC-DC transformation, Buck circuit is a common step-down topology. the adjustable voltage power supply system is composed of Buck synchronous rectification circuit, drive circuit, power supply circuit, voltage sampling circuit, current sampling circuit, control circuit, and so on. STM32F407 of STMicroelectronics is used as the main control chip to provide PWM for the driving switch device MOS. the voltage feedback circuit is used to calibrate the output voltage to ensure the accuracy of the output voltage. © 2024 SPIE.

关键词： Timing circuits

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Gas-phase manufacturing of nanoparticles 8

Gas-phase manufacturing of nanoparticles

引用

8th International conference for Conveying and Handling of Particulate Solids, CHoPS 2015

作者： Pratsinis, Sotiris E. Department of Mechanical and Process Engineering Institute of Process Engineering Particle Technology Laboratory ETH Zurich ZurichCH-8092 Switzerland

the lecture will start with a fascinating overview of flame aerosol technology: from ancient China to the current manufacture of carbon black and fumed oxide commodities. this technology is advantageous over wet chemistry routes for nanomaterial manufacture as it offers undisputable scalability, fewer process steps, easier particle collection and no liquid by-products that require costly cleaning. Most importantly, flame-made particles and films have unique fractal-like morphology and high purity (e.g. optical fibers) so they can stably form metastable phases such as a) low temperature BaCO3 for NOx storage-reduction catalysts and b) ϵζ-WO3 for ultraselective sensing of acetone (a diabetes marker) in the human breath motivating the development of the corresponding devices. Recent advances by mesoscale and molecular dynamics unravel that the filamentary structure of flame-made aerosols follows a power law: from the well-known fractal-like agglomerates, to aggregates and eventually to compact structures, regardless of sintering mechanism and composition. this allows now optimal reactor design and inexpensive production of sophisticated nanoparticles with controlled composition, size and morphology leading to new sensors, dental materials, nutritional supplements, phosphors, battery materials and catalysts.

关键词： Nanoparticles

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Recent developments with a prototype fan-beam optical CT scanner

Recent developments with a prototype fan-beam optical CT sca...

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7th International conference on 3D Radiation Dosimetry (IC3DDose)

作者： Campbell, W. G. Jirasek, A. Wells, D. Univ Victoria Dept Phys & Astron Victoria BC Canada BC Canc Agcy Vancouverisland Ctr Victoria BC Canada

the latest design of a prototype fan-beam optical computed tomography scanner is presented. A new beam creation system consists of a 635 nm laser diode module with variable, DC voltage-controlled beam intensity. A change in scanner alignment allows for the elimination of ring artefacts caused by data corruption that is spaced symmetrically across the detector array. these artefacts, as well as a pair of streaking artefacts caused by flask seams, are removed in sinogram space. A flask registration technique has been developed that allows for accurate, reproducible dosimeter placement. Protocol investigations with gel dosimeters have indicated the importance of: i) proper cooling techniques during gel manufacture, and ii) scanning the dosimeter while it is at room temperature. Latest reconstructions of a normoxic polymer gel dosimeter are presented as an indicator of current system performance.

关键词： Dosimeters

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