Bibliografias temáticas / Optical processing unit

Literatura científica selecionada sobre o tema "Optical processing unit"

Autor: Grafiati

Publicado: 25 de maio de 2024

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Artigos de revistas sobre o assunto "Optical processing unit"

Kawai, Hideo, e Yoshinori Takeuchi. "Processing Unit for Stacked Optical Computing System: Pattern Shift Encoder". Optical Review 3, n.º 6 (novembro de 1996): A381—A384. http://dx.doi.org/10.1007/bf02935937.

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Mauch, Florian, Marc Gronle, Wolfram Lyda e Wolfgang Osten. "Open-source graphics processing unit–accelerated ray tracer for optical simulation". Optical Engineering 52, n.º 5 (9 de maio de 2013): 053004. http://dx.doi.org/10.1117/1.oe.52.5.053004.

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Hulea, Mircea, Zabih Ghassemlooy, Sujan Rajbhandari, Othman Isam Younus e Alexandru Barleanu. "Optical Axons for Electro-Optical Neural Networks". Sensors 20, n.º 21 (27 de outubro de 2020): 6119. http://dx.doi.org/10.3390/s20216119.

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Recently, neuromorphic sensors, which convert analogue signals to spiking frequencies, have been reported for neurorobotics. In bio-inspired systems these sensors are connected to the main neural unit to perform post-processing of the sensor data. The performance of spiking neural networks has been improved using optical synapses, which offer parallel communications between the distanced neural areas but are sensitive to the intensity variations of the optical signal. For systems with several neuromorphic sensors, which are connected optically to the main unit, the use of optical synapses is not an advantage. To address this, in this paper we propose and experimentally verify optical axons with synapses activated optically using digital signals. The synaptic weights are encoded by the energy of the stimuli, which are then optically transmitted independently. We show that the optical intensity fluctuations and link’s misalignment result in delay in activation of the synapses. For the proposed optical axon, we have demonstrated line of sight transmission over a maximum link length of 190 cm with a delay of 8 μs. Furthermore, we show the axon delay as a function of the illuminance using a fitted model for which the root mean square error (RMS) similarity is 0.95.

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LI, XIQI, GUOHUA SHI e YUDONG ZHANG. "TIME-DOMAIN INTERPOLATION ON GRAPHICS PROCESSING UNIT". Journal of Innovative Optical Health Sciences 04, n.º 01 (janeiro de 2011): 89–95. http://dx.doi.org/10.1142/s1793545811001277.

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The signal processing speed of spectral domain optical coherence tomography (SD-OCT) has become a bottleneck in a lot of medical applications. Recently, a time-domain interpolation method was proposed. This method can get better signal-to-noise ratio (SNR) but much-reduced signal processing time in SD-OCT data processing as compared with the commonly used zero-padding interpolation method. Additionally, the resampled data can be obtained by a few data and coefficients in the cutoff window. Thus, a lot of interpolations can be performed simultaneously. So, this interpolation method is suitable for parallel computing. By using graphics processing unit (GPU) and the compute unified device architecture (CUDA) program model, time-domain interpolation can be accelerated significantly. The computing capability can be achieved more than 250,000 A-lines, 200,000 A-lines, and 160,000 A-lines in a second for 2,048 pixel OCT when the cutoff length is L = 11, L = 21, and L = 31, respectively. A frame SD-OCT data (400A-lines × 2,048 pixel per line) is acquired and processed on GPU in real time. The results show that signal processing time of SD-OCT can be finished in 6.223 ms when the cutoff length L = 21, which is much faster than that on central processing unit (CPU). Real-time signal processing of acquired data can be realized.

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Desmet, Remco, e Martin Virte. "Laser diodes with modulated optical injection: towards a simple signal processing unit?" Journal of Physics: Photonics 2, n.º 2 (18 de fevereiro de 2020): 025002. http://dx.doi.org/10.1088/2515-7647/ab7081.

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Vinegoni, Claudio, Lyuba Fexon, Paolo Fumene Feruglio, Misha Pivovarov, Jose-Luiz Figueiredo, Matthias Nahrendorf, Antonio Pozzo, Andrea Sbarbati e Ralph Weissleder. "High throughput transmission optical projection tomography using low cost graphics processing unit". Optics Express 17, n.º 25 (23 de novembro de 2009): 22320. http://dx.doi.org/10.1364/oe.17.022320.

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Pulov, Dimcho, e Tsanko Karadzhov. "OPTOELECTRONIC DEVICE FOR MEASURING THE POWER OF LASER RADIATION". ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (16 de junho de 2021): 286–90. http://dx.doi.org/10.17770/etr2021vol3.6590.

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A device for measuring the power of the laser radiation.has been designed. The device consists of transmitter and receiving part. The transmitter includes optical radiation source and optical system for collimation of radiation. The receiver part consists of silicon photodiodes, electronic signal processing unit and unit for measurements.

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LI, XIQI, GUOHUA SHI, LING WEI, ZHIHUA DING e YUDONG ZHANG. "HIGH-SPEED SPECTRAL DOMAIN OPTICAL COHERENCE TOMOGRAPHY SIGNAL PROCESSING WITH TIME-DOMAIN INTERPOLATION USING GRAPHICS PROCESSING UNIT". Journal of Innovative Optical Health Sciences 04, n.º 03 (julho de 2011): 325–35. http://dx.doi.org/10.1142/s1793545811001599.

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Sensitivity and data processing speed are important in spectral domain Optical Coherence Tomography (SD-OCT) system. To get a higher sensitivity, zero-padding interpolation together with linear interpolation is commonly used to re-sample the interference data in SD-OCT, which limits the data processing speed. Recently, a time-domain interpolation for SD-OCT was proposed. By eliminating the huge Fast Fourier Transform Algorithm (FFT) operations, the operation number of the time-domain interpolation is much less than that of the zero-padding interpolation. In this paper, a numerical simulation is performed to evaluate the computational complexity and the interpolation accuracy. More than six times acceleration is obtained. At the same time, the normalized mean square error (NMSE) results show that the time-domain interpolation method with cut-off length L = 21 and L = 31 can improve about 1.7 dB and 2.1 dB when the distance mismatch is 2.4 mm than that of zero-padding interpolation method with padding times M = 4, respectively. Furthermore, this method can be applied the parallel arithmetic processing because only the data in the cut-off window is processed. By using Graphics Processing Unit (GPU) with compute unified device architecture (CUDA) program model, a frame (400 A-lines × 2048 pixels × 12 bits) data can be processed in 6 ms and the processing capability can be achieved 164,000 line/s for 1024-OCT and 71,000 line/s for 2048-OCT when the cut-off length is 21. Thus, a high-sensitivity and ultra-high data processing SD-OCT is realized.

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Latinović, Nikola, Ilija Popadić, Branko Tomić, Aleksandar Simić, Petar Milanović, Srećko Nijemčević, Miroslav Perić e Mladen Veinović. "Signal Processing Platform for Long-Range Multi-Spectral Electro-Optical Systems". Sensors 22, n.º 3 (8 de fevereiro de 2022): 1294. http://dx.doi.org/10.3390/s22031294.

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In this paper, we present a hardware and software platform for signal processing (SPP) in long-range, multi-spectral, electro-optical systems (MSEOS). Such systems integrate various cameras such as lowlight color, medium or long-wave-infrared thermal and short-wave-infrared cameras together with other sensors such as laser range finders, radars, GPS receivers, etc. on rotational pan-tilt positioner platforms. An SPP is designed with the main goal to control all components of an MSEOS and execute complex signal processing algorithms such as video stabilization, artificial intelligence-based target detection, target tracking, video enhancement, target illumination, multi-sensory image fusion, etc. Such algorithms might be very computationally demanding, so an SPP enables them to run by splitting processing tasks between a field-programmable gate array (FPGA) unit, a multicore microprocessor (MCuP) and a graphic processing unit (GPU). Additionally, multiple SPPs can be linked together via an internal Gbps Ethernet-based network to balance the processing load. A detailed description of the SPP system and experimental results of workloads for typical algorithms on demonstrational MSEOS are given. Finally, we give remarks regarding upgrading SPPs as novel FPGAs, MCuPs and GPUs become available.

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CHATTOPADHYAY, TANAY. "ALL-OPTICAL TERAHERTZ OPTICAL ASYMMETRIC DEMULTIPLEXER (TOAD) BASED BINARY COMPARATOR: A PROPOSAL". Journal of Nonlinear Optical Physics & Materials 18, n.º 03 (setembro de 2009): 471–80. http://dx.doi.org/10.1142/s0218863509004701.

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Comparator determines whether a number is greater than, equals to or less than another number. It plays a significant role in fast central processing unit in all-optical scheme. In all-optical scheme here 1-bit binary comparator is proposed and described by Terahertz Optical Asymmetric Demultiplexer (TOAD) based interferometric switch. Simulation result by Mathcad-7 is also given. Cascading technique of building up the n-bit binary comparator with this 1-bit comparator block is also proposed here.

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Mais fontes

Teses / dissertações sobre o assunto "Optical processing unit"

Eklund, Anders, Paul Dufort, Daniel Forsberg e Stephen LaConte. "Medical Image Processing on the GPU : Past, Present and Future". Linköpings universitet, Medicinsk informatik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-93673.

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Graphics processing units (GPUs) are used today in a wide range of applications, mainly because they can dramatically accelerate parallel computing, are affordable and energy efficient. In the field of medical imaging, GPUs are in some cases crucial for enabling practical use of computationally demanding algorithms. This review presents the past and present work on GPU accelerated medical image processing, and is meant to serve as an overview and introduction to existing GPU implementations. The review covers GPU acceleration of basic image processing operations (filtering, interpolation, histogram estimation and distance transforms), the most commonly used algorithms in medical imaging (image registration, image segmentation and image denoising) and algorithms that are specific to individual modalities (CT, PET, SPECT, MRI, fMRI, DTI, ultrasound, optical imaging and microscopy). The review ends by highlighting some future possibilities and challenges.

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Wacker, Jonas. "Random features for dot product kernels and beyond". Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS241.

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Les noyaux de produit scalaire, tels que les noyaux polynomiaux et exponentiels (softmax), sont parmi les noyaux les plus utilisés en apprentissage automatique, car ils permettent de modéliser les interactions entre les composantes des vecteurs d'entrée, ce qui est crucial dans des applications telles que la vision par ordinateur, le traitement du langage naturel et les systèmes de recommandation. Cependant, un inconvénient fondamental des modèles statistiques basés sur les noyaux est leur évolutivité limitée à un grand nombre de données d'entrée, ce qui nécessite de recourir à des approximations. Dans cette thèse, nous étudions des techniques pour linéariser les méthodes à base de noyaux de produit scalaire au moyen d'approximations de caractéristiques aléatoires. En particulier, nous nous concentrons sur une analyse de variance pour étudier et améliorer leur efficacité statistique
Dot product kernels, such as polynomial and exponential (softmax) kernels, are among the most widely used kernels in machine learning, as they enable modeling the interactions between input features, which is crucial in applications like computer vision, natural language processing, and recommender systems. However, a fundamental drawback of kernel-based statistical models is their limited scalability to a large number of inputs, which requires resorting to approximations. In this thesis, we study techniques to linearize kernel-based methods by means of random feature approximations and we focus on the approximation of polynomial kernels and more general dot product kernels to make these kernels more useful in large scale learning. In particular, we focus on a variance analysis as a main tool to study and improve the statistical efficiency of such sketches

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Paolini, Aaron Louis. "A real-time super resolution implementation using modern graphics processing units". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 88 p, 2009. http://proquest.umi.com/pqdweb?did=1821542441&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Van, Huyssteen Salomon Stephanus. "Parallel paradigms in optimal structural design". Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/18017.

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Thesis (MScEng)--Stellenbosch University, 2011.
ENGLISH ABSTRACT: Modern-day processors are not getting any faster. Due to the power consumption limit of frequency scaling, parallel processing is increasingly being used to decrease computation time. In this thesis, several parallel paradigms are used to improve the performance of commonly serial SAO programs. Four novelties are discussed: First, replacing double precision solvers with single precision solvers. This is attempted in order to take advantage of the anticipated factor 2 speed increase that single precision computations have over that of double precision computations. However, single precision routines present unpredictable performance characteristics and struggle to converge to required accuracies, which is unfavourable for optimization solvers. Second, QP and dual are statements pitted against one another in a parallel environment. This is done because it is not always easy to see which is best a priori. Therefore both are started in parallel and the competing threads are cancelled as soon as one returns a valid point. Parallel QP vs. dual statements prove to be very attractive, converging within the minimum number of outer iterations. The most appropriate solver is selected as the problem properties change during the iteration steps. Thread cancellation poses problems caused by threads having to wait to arrive at appropriate checkpoints, thus su ering from unnecessarily long wait times because of struggling competing routines. Third, multiple global searches are started in parallel on a shared memory system. Problems see a speed increase of nearly 4x for all problems. Dynamically scheduled threads alleviate the need for set thread amounts, as in message passing implementations. Lastly, the replacement of existing matrix-vector multiplication routines with optimized BLAS routines, especially BLAS routines targeted at GPGPU technologies (graphics processing units), proves to be superior when solving large matrix-vector products in an iterative environment. These problems scale well within the hardware capabilities and speedups of up to 36x are recorded.
AFRIKAANSE OPSOMMING: Hedendaagse verwerkers word nie vinniger nie as gevolg van kragverbruikingslimiet soos die verwerkerfrekwensie op-skaal. Parallelle prosesseering word dus meer dikwels gebruik om berekeningstyd te laat daal. Verskeie parallelle paradigmas word gebruik om die prestasie van algemeen sekwensiële optimeringsprogramme te verbeter. Vier ontwikkelinge word bespreek: Eerste, is die vervanging van dubbel presisie roetines met enkel presisie roetines. Dit poog om voordeel te trek uit die faktor 2 spoed verbetering wat enkele presisie berekeninge het oor dubbel presisie berekeninge. Enkele presisie roetines is onvoorspelbaar en sukkel in meeste gevalle om die korrekte akkuraatheid te vind. Tweedens word QP teen duale algoritmes in ’n parallel omgewing gebruik. Omdat dit nie altyd voor die tyd maklik is om te sien watter een die beste gaan presteer nie, word almal in parallel begin en die mededingers word dan gekanselleer sodra een terugkeer met ’n geldige KKT punt. Parallele QP teen duale algoritmes blyk om baie aantreklik te wees. Konvergensie gebeur in alle gevalle binne die minimum aantal iterasies. Die mees geskikte algoritme word op elke iterasie gebruik soos die probleem eienskappe verander gedurende die iterasie stappe. “Thread” kanseleering hou probleme in en word veroorsaak deur “threads” wat moet wag om die kontrolepunte te bereik, dus ly die beste roetines onnodig as gevolg van meededinger roetines was sukkel. Derdens, verskeie globale optimerings word in parallel op ’n “shared memory” stelsel begin. Probleme bekom ’n spoed verhoging van byna vier maal vir alle probleme. Dinamiese geskeduleerde “threads” verlig die behoefte aan voorafbepaalde “threads” soos gebruik word in die “message passing” implementerings. Laastens is die vervanging van die bestaande matriks-vektor vermenigvuldiging roetines met geoptimeerde BLAS roetines, veral BLAS roetines wat gerig is op GPGPU tegnologië. Die GPU roetines bewys om superieur te wees wanneer die oplossing van groot matrix-vektor produkte in ’n iteratiewe omgewing gebruik word. Hierdie probleme skaal ook goed binne die hardeware se vermoëns, vir die grootste probleme wat getoets word, word ’n versnelling van 36 maal bereik.

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Caucci, Luca. "Task Performance with List-Mode Data". Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242402.

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This dissertation investigates the application of list-mode data to detection, estimation, and image reconstruction problems, with an emphasis on emission tomography in medical imaging. We begin by introducing a theoretical framework for list-mode data and we use it to define two observers that operate on list-mode data. These observers are applied to the problem of detecting a signal~(known in shape and location) buried in a random lumpy background. We then consider maximum-likelihood methods for the estimation of numerical parameters from list-mode data, and we characterize the performance of these estimators via the so-called Fisher information matrix. Reconstruction from PET list-mode data is then considered. In a process we called "double maximum-likelihood" reconstruction, we consider a simple PET imaging system and we use maximum-likelihood methods to first estimate a parameter vector for each pair of gamma-ray photons that is detected by the hardware. The collection of these parameter vectors forms a list, which is then fed to another maximum-likelihood algorithm for volumetric reconstruction over a grid of voxels. Efficient parallel implementation of the algorithms discussed above is then presented. In this work, we take advantage of two low-cost, mass-produced computing platforms that have recently appeared on the market, and we provide some details on implementing our algorithms on these devices. We conclude this dissertation work by elaborating on a possible application of list-mode data to X-ray digital mammography. We argue that today's CMOS detectors and computing platforms have become fast enough to make X-ray digital mammography list-mode data acquisition and processing feasible.

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Klimeš, Lubomír. "Optimalizace parametrů sekundárního chlazení plynulého odlévání oceli". Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-234206.

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Continuous casting is a dominant production technology of steelmaking which is currently used for more that 95% of the world steel production. Mathematical modelling and optimal control of casting machine are crucial tasks in continuous steel casting which directly influence productivity and quality of produced steel, competitiveness of steelworks, safety of casting machine operation and its impact on the environment. This thesis concerns with the development and implementation of the numerical model of temperature field for continuously cast steel billets and its use for optimal control of the casting machine. The numerical model was developed and implemented in MATLAB. Due to computational demands the model was parallelized by means of the computation on graphics processing units NVIDIA with the computational architecture CUDA. Validation and verification of the model were performed with the use of operational data from Trinecke zelezarny steelworks. The model was then utilized as a part of the developed model-based predictive control system for the optimal control of dynamic situations in the casting machine operation. The behaviour of the developed control system was examined by means of dynamic model situations that have confirmed the ability of the implemented system to optimally control dynamic operations of the continuous casting machine. Both the numerical model of the temperature field and the model-based predictive control system have been implemented so that they can be modified for any casting machine and this allows for their prospective commercial applications.

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Kriske, Jeffery Edward Jr. "A scalable approach to processing adaptive optics optical coherence tomography data from multiple sensors using multiple graphics processing units". Thesis, 2014. http://hdl.handle.net/1805/6458.

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Indiana University-Purdue University Indianapolis (IUPUI)
Adaptive optics-optical coherence tomography (AO-OCT) is a non-invasive method of imaging the human retina in vivo. It can be used to visualize microscopic structures, making it incredibly useful for the early detection and diagnosis of retinal disease. The research group at Indiana University has a novel multi-camera AO-OCT system capable of 1 MHz acquisition rates. Until this point, a method has not existed to process data from such a novel system quickly and accurately enough on a CPU, a GPU, or one that can scale to multiple GPUs automatically in an efficient manner. This is a barrier to using a MHz AO-OCT system in a clinical environment. A novel approach to processing AO-OCT data from the unique multi-camera optics system is tested on multiple graphics processing units (GPUs) in parallel with one, two, and four camera combinations. The design and results demonstrate a scalable, reusable, extensible method of computing AO-OCT output. This approach can either achieve real time results with an AO-OCT system capable of 1 MHz acquisition rates or be scaled to a higher accuracy mode with a fast Fourier transform of 16,384 complex values.

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Shafer, Brandon Andrew. "Real-time adaptive-optics optical coherence tomography (AOOCT) image reconstruction on a GPU". Thesis, 2014. http://hdl.handle.net/1805/6105.

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Indiana University-Purdue University Indianapolis (IUPUI)
Adaptive-optics optical coherence tomography (AOOCT) is a technology that has been rapidly advancing in recent years and offers amazing capabilities in scanning the human eye in vivo. In order to bring the ultra-high resolution capabilities to clinical use, however, newer technology needs to be used in the image reconstruction process. General purpose computation on graphics processing units is one such way that this computationally intensive reconstruction can be performed in a desktop computer in real-time. This work shows the process of AOOCT image reconstruction, the basics of how to use NVIDIA's CUDA to write parallel code, and a new AOOCT image reconstruction technology implemented using NVIDIA's CUDA. The results of this work demonstrate that image reconstruction can be done in real-time with high accuracy using a GPU.

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Hailu, Daniel. "Hybrid Spectral Ray Tracing Method for Multi-scale Millimeter-wave and Photonic Propagation Problems". Thesis, 2011. http://hdl.handle.net/10012/6355.

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This thesis presents an efficient self-consistent Hybrid Spectral Ray Tracing (HSRT) technique for analysis and design of multi-scale sub-millimeter wave problems, where sub-wavelength features are modeled using rigorous methods, and complex structures with dimensions in the order of tens or even hundreds of wavelengths are modeled by asymptotic methods. Quasi-optical devices are used in imaging arrays for sub-millimeter and terahertz applications, THz time-domain spectroscopy (THz-TDS), high-speed wireless communications, and space applications to couple terahertz radiation from space to a hot electron bolometer. These devices and structures, as physically small they have become, are very large in terms of the wavelength of the driving quasi-optical sources and may have dimension in the tens or even hundreds of wavelengths. Simulation and design optimization of these devices and structures is an extremely challenging electromagnetic problem. The analysis of complex electrically large unbounded wave structures using rigorous methods such as method of moments (MoM), finite element method (FEM), and finite difference time domain (FDTD) method can become almost impossible due to the need for large computational resources. Asymptotic high-frequency techniques are used for analysis of electrically large quasi-optical systems and hybrid methods for solving multi-scale problems. Spectral Ray Tracing (SRT) has a number of unique advantages as a candidate for hybridization. The SRT method has the advantages of Spectral Theory of Diffraction (STD). STD can model reflection, refraction and diffraction of an arbitrary wave incident on the complex structure, which is not the case for diffraction theories such as Geometrical Theory of Diffraction (GTD), Uniform theory of Diffraction (UTD) and Uniform Asymptotic Theory (UAT). By including complex rays, SRT can effectively analyze both near-fields and far-fields accurately with minimal approximations. In this thesis, a novel matrix representation of SRT is presented that uses only one spectral integration per observation point and applied to modeling a hemispherical and hyper-hemispherical lens. The hybridization of SRT with commercially available FEM and MoM software is proposed in this work to solve the complexity of multi-scale analysis. This yields a computationally efficient self-consistent HSRT algorithm. Various arrangements of the Hybrid SRT method such as FEM-SRT, and MoM-SRT, are investigated and validated through comparison of radiation patterns with Ansoft HFSS for the FEM method, FEKO for MoM, Multi-level Fast Multipole Method (MLFMM) and physical optics. For that a bow-tie terahertz antenna backed by hyper-hemispherical silicon lens, an on-chip planar dipole fabricated in SiGe:C BiCMOS technology and attached to a hyper-hemispherical silicon lens and a double-slot antenna backed by silica lens will be used as sample structures to be analyzed using the HSRT. Computational performance (memory requirement, CPU/GPU time) of developed algorithm is compared to other methods in commercially available software. It is shown that the MoM-SRT, in its present implementation, is more accurate than MoM-PO but comparable in speed. However, as shown in this thesis, MoM-SRT can take advantage of parallel processing and GPU. The HSRT algorithm is applied to simulation of on-chip dipole antenna backed by Silicon lens and integrated with a 180-GHz VCO and radiation pattern compared with measurements. The radiation pattern is measured in a quasi-optical configuration using a power detector. In addition, it is shown that the matrix formulation of SRT and HSRT are promising approaches for solving complex electrically large problems with high accuracy. This thesis also expounds on new measurement setup specifically developed for measuring integrated antennas, radiation pattern and gain of the embedded on-chip antenna in the mmW/ terahertz range. In this method, the radiation pattern is first measured in a quasi-optical configuration using a power detector. Subsequently, the radiated power is estimated form the integration over the radiation pattern. Finally, the antenna gain is obtained from the measurement of a two-antenna system.

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Livros sobre o assunto "Optical processing unit"

Smith, John W. T. Optical character recognition: The technology and its application in information units and libraries. Boston Spa, Wetherby, West Yorkshire: British Library, 1985.

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Wyatt, Clair L. Recommended practice, symbols, terms, units, and uncertainty analysis for radiometric sensor calibration. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1998.

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E, Privalʹskiĭ V., Datla Raju Umapathi, Taylor B. N e National Institute of Standards and Technology (U.S.), eds. Recommended practice; symbols, terms, units and uncertainty analysis for radiometric sensor calibration. Washington, D.C: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 1998.

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Pozzolini, Flavia, ed. Quando la giustizia incontra il minore. Florence: Firenze University Press, 2013. http://dx.doi.org/10.36253/978-88-6655-412-7.

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Questo volume raccoglie le relazioni del Convegno Quando la giustizia incontra il minore tenutosi a Pesaro l’11 maggio 2013. Il Convegno, che ha visto la partecipazione di giuriste e professioniste del settore, è stata un’importante occasione di dibattimento sui modi di una corretta audizione protetta dei minori, in tanti processi che li vedono coinvolti, e sulla conseguente necessità, nei tribunali, di locali adeguatamente attrezzati allo scopo. La realizzazione di aule di ascolto protetto nei tribunali italiani è stato il principale progetto nazionale del Soroptimist International d’Italia nel biennio 2011-2013; a oggi sono 40 le aule completate e ulteriori 10 sono in fase di realizzazione. Tale progetto è destinato a proseguire anche nel prossimo biennio. Il Soroptimist International è un’associazione femminile composta di donne con elevata qualificazione nell’ambito lavorativo che opera, attraverso progetti, per la promozione dei diritti umani, l’avanzamento della condizione femminile e l’accettazione delle diversità. Il termine deriva dalle parole latine soror e optima. Il primo Club Soroptimist è nato nel 1921 negli Stati Uniti; il primo club italiano è stato fondato nel 1928 a Milano. I Club italiani sono attualmente 143 con circa 6000 socie. Il SI d’Italia edita la rivista «La voce delle donne – Soroptimist news» e ha un sito istituzionale www.soroptimist.it. Con Prefazione del ministro Annamaria Cancellieri

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Capítulos de livros sobre o assunto "Optical processing unit"

Chennur, Bhavin G., Nishanth Shastry, S. Monish, Vibha V. Hegde, Pooja Agarwal e Arti Arya. "Optimal Scheduling of Processing Unit Using Convolutional Neural Network Architecture". In Lecture Notes in Networks and Systems, 478–87. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-16075-2_33.

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Jiang, Jingjing, Linda Ahnen, Alexander Kalyanov, Scott Lindner, Martin Wolf e Salvador Sanchez Majos. "A New Method Based on Graphics Processing Units for Fast Near-Infrared Optical Tomography". In Advances in Experimental Medicine and Biology, 191–97. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55231-6_26.

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Arun, Vanya, Kapil Deo Bodha, Awadhesh K. Maurya e Ashutosh K. Singh. "Design and Implementation of All Optical Processing Units Together Performing Arithmetic and Logical Functions". In Lecture Notes in Electrical Engineering, 83–93. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0312-0_10.

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Liao, Jia-Wei, Tsung-Ming Huang, Tiexiang Li, Wen-Wei Lin, Han Wang e Shing-Tung Yau. "An UNet-Based Brain Tumor Segmentation Framework via Optimal Mass Transportation Pre-processing". In Brainlesion: Glioma, Multiple Sclerosis, Stroke and Traumatic Brain Injuries, 216–28. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-33842-7_19.

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Kaya, Ilhan, Anand P. Santhanam, Kye-sung Lee, Panomsak Meemon, Nicolene Papp e Jannick P. Rolland. "A Physics-Based Modeling and Real-Time Simulation of Biomechanical Diffusion Process Through Optical Imaged Alveolar Tissues on Graphical Processing Units". In Recent Advances in the 3D Physiological Human, 149–62. London: Springer London, 2009. http://dx.doi.org/10.1007/978-1-84882-565-9_10.

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Lin, Ya, Zhongqiang Wang, Xiaoning Zhao, Haiyang Xu e Yichun Liu. "In-sensor Computing Based on Two-terminal Optoelectronic Memristors". In Advanced Memory Technology, 339–72. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839169946-00339.

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In-sensor computing, which is capable of combining sensing, processing, and memory in a single unit, has been proposed to implement a brain-inspired artificial visual system. Among the proposed candidates, two-terminal optoelectronic memristors with optical and electrical hybrid stimuli have been considered to be one suitable hardware for in-sensor computing due to their low power consumption, fast operating speed, and high scalability. Up to now, various optoelectronic memristive devices have been developed to overcome the drawbacks of conventional artificial visual systems with partition of sensory, memory and processing units. In this chapter, the recent progress in two-terminal optoelectronic memristors for in-sensor computing is focused. We introduced the physical mechanism of optoelectronic memristors in detail, including photon–electron and photon–ion coupling processes. The main operation behaviors can be classified into light–electric hybrid-controlled and fully-light controlled types. Moreover, optoelectronic applications, such as optoelectronic logic, image detection and memorizing, and low/high-level sensory processing functions, were also presented. Finally, a brief discussion of the perspectives and challenges for further development of in-sensor computing based on optoelectronic memristors is presented.

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Rodrigues, Joel J. P. C., Mário M. Freire, Paulo P. Monteiro e Pascal Lorenz. "Optical Burst Switch as a New Switching Paradigm for High-Speed Internet". In Encyclopedia of Multimedia Technology and Networking, Second Edition, 1122–29. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-014-1.ch152.

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The concept of burst switching was initially proposed in the context of voice communications by Haselton (1983) and Amstutz (1983, 1989) in the early 1980s. More recently, in the late 1990s, optical burst switching (OBS) has been proposed as a new switching paradigm for the so-called optical Internet, in order to overcome the technical limitations of optical packet switching, namely the lack of optical random access memory (optical RAM) and to the problems with synchronization (Baldine, Rouskas, Perros, & Stevenson, 2002; Chen, Qiao, & Yu, 2004; Qiao & Yoo, 1999; Turner, 1999; Yoo & Qiao, 1997; Xu, Perros, & Rouskas, 2001). OBS is a technical compromise between wavelength routing and optical packet switching, since it does not require optical buffering or packet-level processing as in optical packet switching, and it is more efficient than circuit switching if the traffic volume does not require a full wavelength channel. According to Dolzer, Gauger, Späth, and Bodamer (2001), OBS has the following characteristics: • Granularity—the transmission unit size (burst) of OBS is between the optical circuit switching and optical packet switching; • Separation between control and data—control information (header) and data are transmitted on a different wavelengths (or channels) with some time interval; • Allocation of resources—resources are allocated using mainly one-way reservation schemes. A source node does not need to wait for the acknowledge message from destination node to start transmitting the burst; • Variable burst length—the burst size is variable; • No optical buffering—burst switching does not require optical buffering at the intermediate nodes (without any delay).

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Rynska, Elzbieta Dagny, Anna Teresa Oniszk-Poplawska e Urszula Kozminska. "Quality of Resilient Cities, the Issue of Urban Waste". In Megacities and Rapid Urbanization, 228–49. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-9276-1.ch011.

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This chapter focuses on the metabolic concept for the management and treatment of construction waste and organic fraction of municipal solid waste in urban areas. Analysis of related Dutch, German and Polish guidelines for environmental zoning of industrial plants, allows formulation of conditions for an optimal siting of waste infrastructure within urban unit. Protection zones are defined in accordance with specific requirements for waste facilities, which treat and recycle both municipal and construction waste. Distances from inhabited areas are related to environmental burdens generated by such facilities (incl. parameters such as odours, noise level, explosion impacts and emissions of other substances). Moreover, this chapter provides the analysis of a selected case studies of waste facilities processing. A comparison of European guidelines and implementation of practical solutions is described in the case study analysis, including the issues open for the discussion about sustainable siting for waste processing infrastructure within an urban unit.

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Rynska, Elzbieta Dagny, Anna Teresa Oniszk-Poplawska e Urszula Kozminska. "Quality of Resilient Cities, the Issue of Urban Waste". In Advances in Environmental Engineering and Green Technologies, 197–223. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0302-6.ch007.

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Yumalin, T. T., R. B. Salikhov e T. R. Salikhov. "Integrating Wireless Sensor Networks with Organic Polymers for Sustainable". In Advances in Transdisciplinary Engineering. IOS Press, 2023. http://dx.doi.org/10.3233/atde230840.

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Advancements in compact integrated circuit fabrication have significantly progressed, allowing for the integration of wireless transceivers, signal processing units, and sensors into a unified and compact unit. This technological breakthrough has paved the way for seamless interactions with the physical world, finding applications across various domains, including security, production management, and environmental monitoring. In this study, we delve into the intricate design aspects of a distributed sensor network, where each node operates within defined energy and communication constraints. The integration of prevailing wireless technologies, computational capabilities, and organic polymers into an innovative generation of intelligent devices represents a critical dimension of our exploration. This article meticulously examines the implementation of a wireless sensor network employing the Bluetooth Low Energy (BLE) protocol. The incorporation of organic polymers as a sensing layer amplifies energy efficiency and enables selective sensitivity in diverse monitoring applications. A notable advantage is the rapid and cost-effective production of electronics using organic polymers, underlining their substantial potential. Furthermore, we emphasize flexible organic electronics, underpinned by the semiconducting and flexible properties inherent in organic materials, constituting a fundamental element of our technological paradigm. Key prerequisites for achieving optimal operational device performance are thoroughly discussed, encompassing achievements and technical challenges in the design and fabrication of next-generation devices, with a keen focus on product optimization.

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Trabalhos de conferências sobre o assunto "Optical processing unit"

Mitkas, Pericles A., e P. Bruce Berra. "An Optical Processing Unit for Relational Database Operations". In Optical Computing. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/optcomp.1991.me11.

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The management of very large databases (order of hundreds of gigabytes), combined with the real-time response requirement, poses a formidable task even for today's powerful computers. Special-purpose computers dedicated to database management, known as database machines, must provide adequate secondary storage to accommodate the database, high transfer rates to the processing units, and a large degree of parallelism.

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Kawai, Hideo, e Yoshinori Takeuchi. "Processing Unit for Stacked Optical Computing System: Discrete Digital Correlator". In Optical Computing. Washington, D.C.: Optica Publishing Group, 1995. http://dx.doi.org/10.1364/optcomp.1995.omc8.

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We have proposed the stacked optical computing system (STOCS)1 which has advantages of mechanical stability and miniaturization compared to conventional optical systems using lenses and beam splitters. The system has many processing units (STOCS-PUs) which consist of planar optical devices such as a functional interconnection device (FIC), an optical addressable spatial light modulator (SLM), and a reading light supplier (RLS)1,2. Functions of FICs are image splitting, image combining and space invariant/variant other interconnections. Output images from the FIC are written on the writing side of the SLM. The RLS is placed on the SLM, and it supplies reading light to the reading side of the SLM and transmits reading images from the SLM. We demonstrated reading out function of the RLS, and images directly written on the SLM were successfully read out2.

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Nitta, Kouichi, Shinichi Ohta e Osamu Matoba. "Implementation of the TSP based on pattern processing with a graphic processing unit". In SPIE Optical Engineering + Applications, editado por Khan M. Iftekharuddin e Abdul A. S. Awwal. SPIE, 2009. http://dx.doi.org/10.1117/12.826851.

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Arianyan, Ehsan, Seyed Ahmad Motamedi e Iman Arianyan. "Efficient Optical Character Recognition on Graphics Processing Unit". In 2012 Sixth International Symposium on Telecommunications (IST). IEEE, 2012. http://dx.doi.org/10.1109/istel.2012.6483093.

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Shafer, Brandon A., Jeffery E. Kriske, Omer P. Kocaoglu, Timothy L. Turner, Zhuolin Liu, John Jaehwan Lee e Donald T. Miller. "Adaptive-optics optical coherence tomography processing using a graphics processing unit". In 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2014. http://dx.doi.org/10.1109/embc.2014.6944470.

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Senthilvelan, Murugappan, e Michael J. Schulte. "Flexible arithmetic and logic unit for multimedia processing". In Optical Science and Technology, SPIE's 48th Annual Meeting, editado por Franklin T. Luk. SPIE, 2003. http://dx.doi.org/10.1117/12.506559.

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Hellerbrand, Stephan, e Norbert Hanik. "Fast Implementation of the Split-Step Fourier Method using a Graphics Processing Unit". In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/ofc.2010.otud7.

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Besaga, Vira R., Anton V. Saetchnikov, Nils C. Gerhardt, Andreas Ostendorf e Martin R. Hofmann. "Near real-time digital holographic imaging on conventional central processing unit". In Optical Measurement Systems for Industrial Inspection XI, editado por Peter Lehmann, Wolfgang Osten e Armando Albertazzi Gonçalves. SPIE, 2019. http://dx.doi.org/10.1117/12.2526112.

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Watanabe, Yuuki, e Dai Kamiyama. "Megahertz processing rate for Fourier domain optical coherence tomography using a graphics processing unit". In SPIE BiOS, editado por Joseph A. Izatt, James G. Fujimoto e Valery V. Tuchin. SPIE, 2012. http://dx.doi.org/10.1117/12.906333.

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Meng, Xiangyan, Guojie Zhang, Nuannuan Shi e Ming Li. "High computational density optical convolution processing unit based on multimode interference". In Real-time Photonic Measurements, Data Management, and Processing VII, editado por Ming Li, Hossein Asghari, Kebin Shi e Nuannuan Shi. SPIE, 2023. http://dx.doi.org/10.1117/12.2688531.

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