Artículos de revistas: "Software acceleration"

1

Long, Gary. "Acceleration Characteristics of Starting Vehicles". Transportation Research Record: Journal of the Transportation Research Board 1737, n.º 1 (enero de 2000): 58–70. http://dx.doi.org/10.3141/1737-08.

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Acceleration characteristics of starting vehicles are needed for many transportation analysis and design purposes involving driveways, turning bays, intersecting streets, traffic signals, railroad crossings, simulation software, and so forth. Constant acceleration is sometimes assumed, or AASHTO Green Book values based on piecewise-constant accelerations are sometimes adopted. However, continuing research has shown that linearly decreasing acceleration rates better represent both maximum vehicle acceleration capabilities and actual motorist behavior. It is not acceleration that usually is constant during speed changes; it is the rate of change in acceleration. The evolution of AASHTO acceleration values for design is traced, and the literature is reviewed for pertinent field observations. Linearly decreasing acceleration (and some deceleration) model parameters are calibrated for various sets of observational and design data. Despite published results from thousands of field measurements, the values selected for design were found to be based mostly on vehicle performance capabilities, with conjecture about how many of these capabilities are normally used by drivers. Design accelerations were found to deviate substantially from observed accelerations. At the start of motion, observed accelerations were about 15 percent faster for passenger cars and 45 percent faster for SU (single unit) trucks than design accelerations. As speed increased, observed accelerations dropped three to four times faster than design accelerations for these vehicles. Observed accelerations for WB-15 trucks began 40 percent to 75 percent slower than design accelerations, and they were considerably slower than the values in the Green Book for trucks at railroad crossings. Voids in the available information base are identified. Linearly decreasing design acceleration rates for motorists operating different classes of vehicles in different design situations are recommended, and revisions for Green Book parameters and charts are suggested. The recommended acceleration model greatly simplifies acceleration parameters but implies using different acceleration relationships for different design speeds instead of one for all.

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2

An, Xiao Xue, Xiao Dong Chai, Wen Fa Zhu y Xiao Wei Xu. "Software Design of the Track State Inspection System Based on LabVIEW". Advanced Materials Research 546-547 (julio de 2012): 1323–28. http://dx.doi.org/10.4028/www.scientific.net/amr.546-547.1323.

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This paper describes the software of the track state inspection system based on LABVIEW, which includes serial communication, data extraction, strap-down algorithm, acceleration integral and saving the results. Serial communication module uses VISA to program in order to realize communication between the IMU (inertial measurement unit)and upper computer. According to the output data format, data extraction module separates the signal of three axes’ accelerations and angular-rates by Match Pattern Function. Strap-down algorithm and acceleration integral modules are programmed by Math Script. The measurement results are saved by Write to Spreadsheet File Function. Finally, it’s to design a convenient humanized operation interface.

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3

Edwards, M. D. y J. Forrest. "Software acceleration using programmable hardware devices". IEE Proceedings - Computers and Digital Techniques 143, n.º 1 (1996): 55. http://dx.doi.org/10.1049/ip-cdt:19960066.

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4

Boroushak, Neda, Hasan Khoshnoodi y Mostafa Rostami. "Investigation of the Head’s Dynamic Response to Boxing Punch Using Computer Simulation". Montenegrin Journal of Sports Science and Medicine 10, n.º 1 (1 de marzo de 2021): 31–35. http://dx.doi.org/10.26773/mjssm.210305.

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Head injuries are dangerous injuries that are common in combat sports. Nevertheless, the mechanisms of concussion in sport have are not precisely known. Thus, this study aimed to investigate the dynamic response of the head based on linear and rotational accelerations in boxing using computer simulation. The ADAMS software model was used to determine the linear and rotational acceleration of boxing’s straight punch. The peak linear acceleration, average linear acceleration, peak rotational acceleration, and average rotational acceleration resulted from the straight punch to head were obtained: 75 g, 20 g, 4036 rad/s², 1140 rad/s², respectively; the impact times were 30 ms and 3 ms, respectively. The comparison of acceleration tolerance thresholds of head injury and obtained results of this study showed the rotational acceleration only leads to head injury. Furthermore, it is biomechanically improbable that the head would be moved only translationally or rotationally as a result of a straight punch. Therefore, both rotational and linear accelerations should be observed together for future studies.

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5

Chen, Andrew, Rohaan Gupta, Anton Borzenko, Kevin Wang y Morteza Biglari-Abhari. "Accelerating SuperBE with Hardware/Software Co-Design". Journal of Imaging 4, n.º 10 (18 de octubre de 2018): 122. http://dx.doi.org/10.3390/jimaging4100122.

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Background Estimation is a common computer vision task, used for segmenting moving objects in video streams. This can be useful as a pre-processing step, isolating regions of interest for more complicated algorithms performing detection, recognition, and identification tasks, in order to reduce overall computation time. This is especially important in the context of embedded systems like smart cameras, which may need to process images with constrained computational resources. This work focuses on accelerating SuperBE, a superpixel-based background estimation algorithm that was designed for simplicity and reducing computational complexity while maintaining state-of-the-art levels of accuracy. We explore both software and hardware acceleration opportunities, converting the original algorithm into a greyscale, integer-only version, and using Hardware/Software Co-design to develop hardware acceleration components on FPGA fabric that assist a software processor. We achieved a 4.4× speed improvement with the software optimisations alone, and a 2× speed improvement with the hardware optimisations alone. When combined, these led to a 9× speed improvement on a Cyclone V System-on-Chip, delivering almost 38 fps on 320 × 240 resolution images.

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6

Manor, Erez, Avrech Ben-David y Shlomo Greenberg. "CORDIC Hardware Acceleration Using DMA-Based ISA Extension". Journal of Low Power Electronics and Applications 12, n.º 1 (15 de enero de 2022): 4. http://dx.doi.org/10.3390/jlpea12010004.

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The use of RISC-based embedded processors aimed at low cost and low power is becoming an increasingly popular ecosystem for both hardware and software development. High-performance yet low-power embedded processors may be attained via the use of hardware acceleration and Instruction Set Architecture (ISA) extension. Recent publications of AI have demonstrated the use of Coordinate Rotation Digital Computer (CORDIC) as a dedicated low-power solution for solving nonlinear equations applied to Neural Networks (NN). This paper proposes ISA extension to support floating-point CORDIC, providing efficient hardware acceleration for mathematical functions. A new DMA-based ISA extension approach integrated with a pipeline CORDIC accelerator is proposed. The CORDIC ISA extension is directly interfaced with a standard processor data path, allowing efficient implementation of new trigonometric ALU-based custom instructions. The proposed DMA-based CORDIC accelerator can also be used to perform repeated array calculations, offering a significant speedup over software implementations. The proposed accelerator is evaluated on Intel Cyclone-IV FPGA as an extension to Nios processor. Experimental results show a significant speedup of over three orders of magnitude compared with software implementation, while applied to trigonometric arrays, and outperforms the existing commercial CORDIC hardware accelerator.

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7

Edwards, M. D., J. Forrest y A. E. Whelan. "Acceleration of software algorithms using hardware/software co-design techniques". Journal of Systems Architecture 42, n.º 9-10 (febrero de 1997): 697–707. http://dx.doi.org/10.1016/s1383-7621(96)00071-9.

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8

Thompson, David L. "Time, Speed and Acceleration—a software package". Electronic Systems News 1988, n.º 3 (1988): 28. http://dx.doi.org/10.1049/esn.1988.0064.

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9

Tang, Wenkai y Peiyong Zhang. "GPGCN: A General-Purpose Graph Convolution Neural Network Accelerator Based on RISC-V ISA Extension". Electronics 11, n.º 22 (21 de noviembre de 2022): 3833. http://dx.doi.org/10.3390/electronics11223833.

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In the past two years, various graph convolution neural networks (GCNs) accelerators have emerged, each with their own characteristics, but their common disadvantage is that the hardware architecture is not programmable and it is optimized for a specific network and dataset. They may not support acceleration for different GCNs and may not achieve optimal hardware resource utilization for datasets of different sizes. Therefore, given the above shortcomings, and according to the development trend of traditional neural network accelerators, this paper proposes and implements GPGCN: a general-purpose GCNs accelerator architecture based on RISC-V instruction set extension, providing the software programming freedom to support acceleration for various GCNs, and achieving the best acceleration efficiency for different GCNs with different datasets. Compared with traditional CPU, and traditional CPU with vector expansion, GPGCN achieves above 1001×, 267× speedup for GCN with the Cora dataset. Compared with dedicated accelerators, GPGCN has software programmability and supports the acceleration of more GCNs.

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10

Farouk, Yasmeen y Sherine Rady. "Optimizing MRI Registration using Software/Hardware Co-Design Model on FPGA". International Journal of Innovative Technology and Exploring Engineering 10, n.º 2 (10 de diciembre de 2020): 128–37. http://dx.doi.org/10.35940/ijitee.b8300.1210220.

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The correct localization of brain tissue deformation and determination of the tumor growth relies majorly on the accuracy of the process known by image registration. Poor registration may lead to misclassified diseases and highly affect image-guided surgery and radiation therapies. Voxel-based morphometry (VBM) is an image analytical technique encompassing accurate registration but suffers from intensive time computations, similar to most of image registration techniques. Achieving the compromise between accuracy and computations is a challenging mission. Field programmable gate arrays have fast-evolving and customizable hardware acceleration capabilities that promise to help speed up computational tasks. This paper presents a software/hardware co-design model for accelerating the implementation of the diffeomorphic image registration algorithm ‘DARTEL’ as a part of VBM that analyzes MRI images. An optimized and pipelined hardware architecture is proposed and integrated into the Statistical Parametric Mapping (SPM) software tool that runs the DARTEL. Acceleration of the DARTEL registration algorithm resulted in a speedup factor of 114x on function-level, compared to the CPU with a contribution of 8x faster for the overall performance in the registration process of the SPM. The proposed model is successfully validated for the identification of Alzheimer’s disease based on T1-weighted MRI. A proposed software/hardware co-design model for VBM achieves remarkable acceleration while maintaining classification accuracy and proving proficiency against other CPU and GPU implementations.

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11

Yang, Jia Hui y Ben Dong Liu. "The Motion Analysis on Lunge Material Mechanism in Sewing Machine". Applied Mechanics and Materials 313-314 (marzo de 2013): 1055–59. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.1055.

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In this paper, the dynamic characteristics of lunge material mechanism in household sewing machine are simulated with the MATLAB software and the dynamics simulation software ADAMS. The displacement, velocity, acceleration of lunge needle is calculated with MATLAB and simulated with ADAMS. Then the curves of displacement, velocity, acceleration of lunge needle VS time are plotted with the two different softwares respectively. The angular acceleration and drive torque of crank is calculated and simulated either. Then, the contrast and discussion about the calculation and simulation is carried on. This research has some reference value for design and simulation of lunge material mechanism in sewing machine and other machines.

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12

Moreno, Yenita, Ermiyati Ermiyati, Syurya Adi Pratama y Suprasman Suprasman. "Evaluasi Time Schedule Menggunakan Network Planning (Studi Kasus: Pada Proyek Pembangunan Gedung Rawat Inap Kelas III Tahap III Rumah Sakit Umum Daerah Bangkinang, Riau)". INCODING: Journal of Informatics and Computer Science Engineering 3, n.º 1 (26 de abril de 2023): 21–44. http://dx.doi.org/10.34007/incoding.v3i1.331.

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Time Schedule is a detailed division of work duration on each project work. The problem in this study is the ineffectiveness of the duration of the work and the amount of work done is not in accordance with the planned duration. The purpose of the study was to evaluate the time schedule using the network planning method to determine the critical trajectory by using Microsoft Project 2016 software and to accelerate the duration of work from its original duration by using the acceleration method of adding labor, increasing working hours and accelerating the work shift method. The conclusion of time schedule evaluation using network planning is obtained as many as 50 work items which are included in the critical path. After accelerating with three acceleration methods, it was found that the results of accelerating the addition of manpower which cut the time by 3 days from the original duration, acceleration by adding 2 hours of work cut 7 working days and acceleration with the work shift method which cut the duration to 21 working days from the original duration. which is 206 working days, then of the three methods of acceleration the most effective is the shift method.

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13

Ebrahim, Ali. "Finding the Top-K Heavy Hitters in Data Streams: A Reconfigurable Accelerator Based on an FPGA-Optimized Algorithm". Electronics 12, n.º 11 (24 de mayo de 2023): 2376. http://dx.doi.org/10.3390/electronics12112376.

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This paper presents a novel approach for accelerating the top-k heavy hitters query in data streams using Field Programmable Gate Arrays (FPGAs). Current hardware acceleration approaches rely on the direct and strict mapping of software algorithms into hardware, limiting their performance and practicality due to the lack of hardware optimizations at an algorithmic level. The presented approach optimizes a well-known software algorithm by carefully relaxing some of its requirements to allow for the design of a practical and scalable hardware accelerator that outperforms current state-of-the-art accelerators while maintaining near-perfect accuracy. This paper details the design and implementation of an optimized FPGA accelerator specifically tailored for computing the top-k heavy hitters query in data streams. The presented accelerator is entirely specified at the C language level and is easily reproducible with High-Level Synthesis (HLS) tools. Implementation on Intel Arria 10 and Stratix 10 FPGAs using Intel HLS compiler showed promising results—outperforming prior state-of-the-art accelerators in terms of throughput and features.

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14

Datta, Anindya, Kaushik Dutta, Krithi Ramamritham, Helen Thomas y Debra VanderMeer. "Dynamic content acceleration". ACM SIGMOD Record 30, n.º 2 (junio de 2001): 616. http://dx.doi.org/10.1145/376284.375780.

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15

Scieur, Damien, Alexandre d’Aspremont y Francis Bach. "Regularized nonlinear acceleration". Mathematical Programming 179, n.º 1-2 (21 de agosto de 2018): 47–83. http://dx.doi.org/10.1007/s10107-018-1319-8.

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16

Edwards, Martyn y John Forrest. "A practical hardware architecture to support software acceleration". Microprocessors and Microsystems 20, n.º 3 (mayo de 1996): 167–74. http://dx.doi.org/10.1016/0141-9331(95)01074-2.

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17

Guo, Kaiyuan, Song Han, Song Yao, Yu Wang, Yuan Xie y Huazhong Yang. "Software-Hardware Codesign for Efficient Neural Network Acceleration". IEEE Micro 37, n.º 2 (marzo de 2017): 18–25. http://dx.doi.org/10.1109/mm.2017.39.

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18

Xia, Chengpeng, Yawen Chen, Haibo Zhang y Jigang Wu. "STADIA: Photonic Stochastic Gradient Descent for Neural Network Accelerators". ACM Transactions on Embedded Computing Systems 22, n.º 5s (9 de septiembre de 2023): 1–23. http://dx.doi.org/10.1145/3607920.

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Deep Neural Networks (DNNs) have demonstrated great success in many fields such as image recognition and text analysis. However, the ever-increasing sizes of both DNN models and training datasets make deep leaning extremely computation- and memory-intensive. Recently, photonic computing has emerged as a promising technology for accelerating DNNs. While the design of photonic accelerators for DNN inference and forward propagation of DNN training has been widely investigated, the architectural acceleration for equally important backpropagation of DNN training has not been well studied. In this paper, we propose a novel silicon photonic-based backpropagation accelerator for high performance DNN training. Specifically, a general-purpose photonic gradient descent unit named STADIA is designed to implement the multiplication, accumulation, and subtraction operations required for computing gradients using mature optical devices including Mach-Zehnder Interferometer (MZI) and Mircoring Resonator (MRR), which can significantly reduce the training latency and improve the energy efficiency of backpropagation. To demonstrate efficient parallel computing, we propose a STADIA-based backpropagation acceleration architecture and design a dataflow by using wavelength-division multiplexing (WDM). We analyze the precision of STADIA by quantifying the precision limitations imposed by losses and noises. Furthermore, we evaluate STADIA with different element sizes by analyzing the power, area and time delay for photonic accelerators based on DNN models such as AlexNet, VGG19 and ResNet. Simulation results show that the proposed architecture STADIA can achieve significant improvement by 9.7× in time efficiency and 147.2× in energy efficiency, compared with the most advanced optical-memristor based backpropagation accelerator.

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19

Teslyuk, V. M., N. S. Ripak, A. I. Holovatyy, Yu V. Opotyak y T. V. Teslyuk. "Hardware and software provision of the vibration acceleration spectrum monitoring system". Ukrainian Journal of Information Technology 5, n.º 1 (2023): 51–60. http://dx.doi.org/10.23939/ujit2023.01.051.

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Among all types of mechanical influences, vibration is the most dangerous for technical objects. Alternating stresses caused by vibration contribute to the accumulation of damage in materials, system design, and failure. The destruction of the object occurs quite quickly under vibrational influences under the conditions of resonance, at the same time, vibration causes a violation of the physiological and functional states of a person. The impact of vibration on a person depends on its spectral composition, direction of action, duration of exposure, as well as on the individual characteristics of the person. The structure of the vibration acceleration spectrum monitoring system was developed, which is based on the modular principle and includes a microcontroller, an accelerometer, a liquid crystal graphic color display, flash memory, and a microcomputer monitor. Algorithms of the vibration acceleration spectrum monitoring system were developed, including the accelerometer calibration algorithm, the dynamic acceleration measurement algorithm, and the fast Fourier transformation algorithm. The I2C interface for data exchange between the ADXL345 accelerometer and the Raspberry Pi 3 Model B microcomputer is defined. The software that processes the input information from several accelerometers connected to the Raspberry Pi, which enables multi-channel measurements and their analysis, is developed. The results of testing the built system are given which make it possible to assert the correctness and correctness of the functioning of the developed system. The article includes an introduction, an analysis of literary sources with a statement of the researched problem, in the section “Development of the structure and information support of the system for monitoring the spectrum of vibration accelerations” the developed structure of the system and the features of its hardware implementation are given. The hardware implementation was based on the use of inexpensive components to ensure a low price of the technological solution. In addition, in this section, I2C is selected for the implementation of data exchange between the components of the vibration spectrum monitoring system. The section “Algorithmic support of the designed system” describes the main steps of the algorithm. The section “Development of the vibration acceleration monitoring system software” includes information about the developed structure of the software and a brief description of a specific component. The results of testing the developed system are given in the section “Obtained results and their analysis”. The main results of the conducted research are formulated in the conclusions.

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Xu, Li y Dechun Zheng. "A Novel Sobel Edge Detection Accelerator Based on Reconfigurable Architecture". Traitement du Signal 39, n.º 4 (31 de agosto de 2022): 1421–27. http://dx.doi.org/10.18280/ts.390436.

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A novel Sobel edge detection accelerator based on reconfigurable architecture is proposed to solve the problem of low power-to-performance ratio of traditional Sobel edge detection algorithm in CPU processing. The accelerator adopts pixel level fine grain image data parallel processing and row buffer storage architecture to improve the processing efficiency of edge detection. At the same time, a reconfigurable architecture based on FPGA is built. Through experiments, it can be found that the acceleration effect of the edge detection accelerator on video data is superior to that of the CPU software. Compared with similar accelerators, the acceleration performance of the novel accelerators improves by 10%. The results show that the proposed edge detection accelerator can be used in embedded systems to provide edge detection processing capability with high performance power consumption ratio.

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21

Peng, Miao y Wei Jian Cui. "Study on Seismic Dynamic Response of Shallow-Buried Subway Station Structure and Ancillary Facilities". Civil Engineering Journal 4, n.º 12 (23 de diciembre de 2018): 2853. http://dx.doi.org/10.28991/cej-03091203.

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Strong earthquakes can cause damages to structural members and also yield non-negligible damages to nonstructural facilities, the latter being closely related to earthquake-induced inertial forces. At present, the acceleration response regularity of shallow-buried subway station structure is not very clear. Using the finite-element software ABAQUS, a dynamic soil-structure interaction model for a two-story subway station structure is established. The distribution of the peak acceleration response of the structure is obtained, and the damage assessment of non-structural facilities is carried out based on the structural acceleration response. The results demonstrate that, in general, the peak acceleration responses of the subway station structure increase from lower to upper story levels, while the peak acceleration responses at the same height are practically equal. Moreover, the peak accelerations of a shallow-buried subway station structure are generally less than or close to the peak ground acceleration. Furthermore, the nonstructural facilities are slightly damaged when subjected to a peak bedrock input acceleration of 0.1 g, and moderately damaged under a peak bedrock input acceleration in the range 0.2 – 0.6 g. Based on the acceleration response characteristics, it is proposed that the peak surface acceleration can be used as an index to evaluate the damage of non-structural facilities in shallow-buried subway station structure, which is simple, practical and basically meets the precision requirements.

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22

Ham, Tae Jun, Yejin Lee, Seong Hoon Seo, U. Gyeong Song, Jae W. Lee, David Bruns-Smith, Brendan Sweeney, Krste Asanovic, Young H. Oh y Lisa Wu Wills. "Accelerating Genomic Data Analytics With Composable Hardware Acceleration Framework". IEEE Micro 41, n.º 3 (1 de mayo de 2021): 42–49. http://dx.doi.org/10.1109/mm.2021.3072385.

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23

Nishihara, Kazue. "Fundamental Study on Hand Waving Sensors". Journal of Robotics and Mechatronics 2, n.º 5 (20 de octubre de 1990): 325–34. http://dx.doi.org/10.20965/jrm.1990.p0325.

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In order to develop a dynamic man-machine interface which measures angular motions of multi-link mechanisms, a uniaxial hand wave sensor is experimented with and triaxial hand wave sensors are simulated numerically. It was confirmed that a uniaxial hand wave sensor composed of a pair of uniaxially located accelerometers directly obtains exact angular acceleration by subtracting each acceleration signal. A triaxial hand wave sensor by a six (i.e. three pairs) accelerometer method, however, contains duplex angular velocities influenced by other axes in addition to the exact angular acceleration, so it is necessary to separate those physical values by a software algorithm. Adams-Moulton's method for solving differential equations was best suited to solve this nonlinear problem. A nine accelerometer method obtains linear equations for angular accelerations readily after arithmetic calculations of the nine signals.

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24

Altman, Donald B. "Critical layers in accelerating two-layer flows". Journal of Fluid Mechanics 197 (diciembre de 1988): 429–51. http://dx.doi.org/10.1017/s0022112088003313.

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A series of laboratory experiments on accelerating two-layer shear flows over topography is described. The mean flow reverses at the interface of the layers, forcing a critical layer to occur there. It is found that for a sufficiently thin interface, a slowly growing recirculating region, the ‘acceleration rotor’, develops on the interfacial wave at mean-flow Richardson numbers of O(0.5). This, in turn, can induce a secondary dynamical shear instability on the trailing edge of the wave. A single-mode, linear, two-layer numerical model reproduces many features of the acceleration rotor if mean-flow acceleration and bottom forcing are included. Velocity measurements are obtained from photographs using image processing software developed for the automated reading of particle-streak photographs. Typical results are shown.

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Ristiawan, Agung. "ANALISIS GERAK JATUH BEBAS DENGAN METODE VIDEO BASED LABORATORY (VBL) MENGGUNAKAN SOFTWARE TRACKER". Journal of Teaching and Learning Physics 3, n.º 2 (1 de septiembre de 2018): 26–30. http://dx.doi.org/10.15575/jotalp.v3i2.6556.

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The purpose of this study is to determine the magnitude of the gravitational acceleration in free fall motion analyzed by the Tracker and determine the magnitude of the acceleration of free-falling objects depending on the magnitude of the force affecting the object by varying the distance the object is dropped. Retrieval of data in this study through experiments in Catur Tunggal, Yogyakarta. The subject of this research is the large acceleration of free-falling body motion. In the free fall motion variations in the height of falling objects by 40, 50, 60, 70, 80, 90, and 100 cm for the same mass of objects that is 353 grams. The data needed is the position of the load on the free fall through Tracker analysis conducted on the recorded video. To find out the magnitude of the velocity and the magnitude of the frictional force acting on free fall motion an analysis is performed using a predetermined equation. The effective time in this study is two months. Based on the Tracker analysis, a velocity graph of linear time is obtained, from the graph the acceleration of free falling objects obtained by the equation obtained in the linear graph is Y = mt + b, where m is the gradient of the linear graph showing the acceleration obtained by analyzing Tracker is the same as gravitational acceleration in theory and for free fall motion of objects obtained an average acceleration of (9,63 ± 0,33) m/s2.

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Boigelot, Bernard. "Domain-specific regular acceleration". International Journal on Software Tools for Technology Transfer 14, n.º 2 (20 de julio de 2011): 193–206. http://dx.doi.org/10.1007/s10009-011-0206-x.

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Buchheit, Martin, Hani Al Haddad, Ben M. Simpson, Dino Palazzi, Pitre C. Bourdon, Valter Di Salvo y Alberto Mendez-Villanueva. "Monitoring Accelerations With GPS in Football: Time to Slow Down?" International Journal of Sports Physiology and Performance 9, n.º 3 (mayo de 2014): 442–45. http://dx.doi.org/10.1123/ijspp.2013-0187.

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The aims of the current study were to examine the magnitude of between-GPS-models differences in commonly reported running-based measures in football, examine between-units variability, and assess the effect of software updates on these measures. Fifty identical-brand GPS units (15 SPI-proX and 35 SPIproX2, 15 Hz, GPSports, Canberra, Australia) were attached to a custom-made plastic sled towed by a player performing simulated match running activities. GPS data collected during training sessions over 4 wk from 4 professional football players (N = 53 files) were also analyzed before and after 2 manufacturersupplied software updates. There were substantial differences between the different models (eg, standardized difference for the number of acceleration >4 m/s2 = 2.1; 90% confidence limits [1.4, 2.7], with 100% chance of a true difference). Between-units variations ranged from 1% (maximal speed) to 56% (number of deceleration >4 m/s2). Some GPS units measured 2–6 times more acceleration/deceleration occurrences than others. Software updates did not substantially affect the distance covered at different speeds or peak speed reached, but 1 of the updates led to large and small decreases in the occurrence of accelerations (–1.24; –1.32, –1.15) and decelerations (–0.45; –0.48, –0.41), respectively. Practitioners are advised to apply care when comparing data collected with different models or units or when updating their software. The metrics of accelerations and decelerations show the most variability in GPS monitoring and must be interpreted cautiously.

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Ma, Kun. "A Versioning-based Acceleration Method for Software Online Upgrade". Recent Patents on Computer Science 9, n.º 1 (4 de marzo de 2016): 81–88. http://dx.doi.org/10.2174/2213275908666150828190102.

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Arunachalam, Meena, Vrushabh Sanghavi, Samudyatha Kaira y Nilesh A. Ahuja. "End-to-End Industrial IoT: Software Optimization and Acceleration". IEEE Internet of Things Magazine 5, n.º 1 (marzo de 2022): 48–53. http://dx.doi.org/10.1109/iotm.005.2100196.

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Wirtshafter, Hannah S. y Matthew A. Wilson. "Bayesian Algorithmic Decoding of Acceleration and Speed Software (BADASS)". Software Impacts 10 (noviembre de 2021): 100125. http://dx.doi.org/10.1016/j.simpa.2021.100125.

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Xiao, Chunhua, Lei Zhang, Yuhua Xie, Weichen Liu y Duo Liu. "Hardware/Software Adaptive Cryptographic Acceleration for Big Data Processing". Security and Communication Networks 2018 (27 de agosto de 2018): 1–24. http://dx.doi.org/10.1155/2018/7631342.

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Along with the explosive growth of network data, security is becoming increasingly important for web transactions. The SSL/TLS protocol has been widely adopted as one of the effective solutions for sensitive access. Although OpenSSL could provide a freely available implementation of the SSL/TLS protocol, the crypto functions, such as symmetric key ciphers, are extremely compute-intensive operations. These expensive computations through software implementations may not be able to compete with the increasing need for speed and secure connection. Although there are lots of excellent works with the objective of SSL/TLS hardware acceleration, they focus on the dedicated hardware design of accelerators. Hardly of them presented how to utilize them efficiently. Actually, for some application scenarios, the performance improvement may not be comparable with AES-NI, due to the induced invocation cost for hardware engines. Therefore, we proposed the research to take full advantages of both accelerators and CPUs for security HTTP accesses in big data. We not only proposed optimal strategies such as data aggregation to advance the contribution with hardware crypto engines, but also presented an Adaptive Crypto System based on Accelerators (ACSA) with software and hardware codesign. ACSA is able to adopt crypto mode adaptively and dynamically according to the request character and system load. Through the establishment of 40 Gbps networking on TAISHAN Web Server, we evaluated the system performance in real applications with a high workload. For the encryption algorithm 3DES, which is not supported in AES-NI, we could get about 12 times acceleration with accelerators. For typical encryption AES supported by instruction acceleration, we could get 52.39% bandwidth improvement compared with only hardware encryption and 20.07% improvement compared with AES-NI. Furthermore, the user could adjust the trade-off between CPU occupation and encryption performance through MM strategy, to free CPUs according to the working requirements.

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Jaring, Päivi, Asta Bäck, Marko Komssi y Juha Käki. "Using Twitter in the acceleration of marketing new products and services". Journal of Innovation Management 3, n.º 3 (19 de octubre de 2015): 35–56. http://dx.doi.org/10.24840/2183-0606_003.003_0005.

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The popularity of social media and microblogging services, like Twitter, has increased in a fast manner over the last couple of years. Their use in innovation process and marketing has also gained a lot of attention. However, product and service acceleration -i.e. bringing a product or service faster to the market- with the help of social media and especially by using Twitter has not been researched much, in spite of the fact that new marketing techniques like growth hacking -which aims on low-cost and innovative alternatives to traditional marketing- have reached popularity. In this paper, we define the concept of acceleration and analyse via literature and a real-life, explorative case study, how Twitter could be used for accelerating products and services. Our case study analyses the experiences and data from four Twitter accounts created for accelerating two software applications. According to our research, Twitter has potential for product and services acceleration, but it requires taking into account many aspects and challenges that are summarized in this paper.

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Sabat, Samrat L. y Layak Ali. "The hyperspherical acceleration effect particle swarm optimizer". Applied Soft Computing 9, n.º 3 (junio de 2009): 906–17. http://dx.doi.org/10.1016/j.asoc.2008.11.003.

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Gilroy, Michael, James Irvine y Robert Atkinson. "RAID 6 Hardware Acceleration". ACM Transactions on Embedded Computing Systems 10, n.º 4 (noviembre de 2011): 1–17. http://dx.doi.org/10.1145/2043662.2043667.

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Roulet, Vincent y Alexandre d'Aspremont. "Sharpness, Restart, and Acceleration". SIAM Journal on Optimization 30, n.º 1 (enero de 2020): 262–89. http://dx.doi.org/10.1137/18m1224568.

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36

Behzadafshar, Katayoun. "Study on frequency content of provided strong ground motion in West Azerbaijan and East Azerbaijan". Ukrainian Journal of Ecology 7, n.º 4 (25 de diciembre de 2017): 340–48. http://dx.doi.org/10.15421/2017_125.

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<p>This study aims to better reveal the characteristics of the assessed ground motion in west and east Azerbaijan. Due to existence of happened great earthquakes and large number of potential seismic sources in North-West of Iran which is located in junction of Alborz and Zagros seismotectonic provinces, it is an interesting area for seismologists. Considering to population and existence of large cities like Tabriz, Ardabil and Orumiyeh which play crucial role in industry and economy of Iran, authors decided to focus on study of frequency content of strong ground motion to achieve ground acceleration in different frequencies indicate critical frequencies in the studied area. in this study have been applied is professional industrial software which has been written in 2009 and provided by authors; Because This applied software can cover previous software weak points very well. Obtained hazard maps illustrate that maximum accelerations will be experienced in North West to South East direction which increased by frequency reduction from 100 Hz to 10 Hz then decreased by frequency reduce (to 0.25 Hz). Maximum acceleration will be occurred in the basement in 10 Hz.</p>

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Wang, Qin, Pei Xia Chen, Xin Zhang, He Qi Tang y Yang Xu. "Tall Building Structure’s Heightening Reform and Elasto-Plastic Analysis". Applied Mechanics and Materials 94-96 (septiembre de 2011): 1322–27. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.1322.

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Aim at one tall building structure model, which is a nonlinear three-dimensional finite element model. ANSYS FEM software is used to set up the structure model, proceeding modal analysis on natural vibration period and vibration model; ANSYS FEM software is used to import El Centro and Taft acceleration time-travel curves, which are used in 7 degree film, proceeding elasto-plastic analysis, and compared with the result of PKPM software earthquake static effect, the layer displacement calculation results contrast between two software shows it is consistent, but contrary results occurs in ISDA. So for the similar project design auxiliary FEM analysis is needed; Seven degree rarely met earthquake acceleration time-travel data and larger seismic peak acceleration time-travel imported to research the plastic development.

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38

Sherbakov, S. S. y M. M. Polestchuk. "Acceleration of boundary element calculations for closed domain using nonlinear form functions and CUDA technology". Doklady BGUIR 19, n.º 3 (2 de junio de 2021): 14–21. http://dx.doi.org/10.35596/1729-7648-2021-19-14-21.

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The evolution of computer technologies, as a hardware and a software parts, allows to attain fast and accurate solutions to many applied problems in scientific areas. Acceleration of calculations is broadly used technic that is basically implemented by multithreading and multicore processors. NVidia CUDA technology or simply CUDA opens a way to efficient acceleration of boundary elements method (BEM), that includes many independent stages. The main goal of the paper is implementation and acceleration of indirect boundary element method using three form functions. Calculation of the potentialdistribution inside a closed boundary under the action of the defined boundary condition is considered. In order to accelerate corresponding calculations, they were parallelized at the graphic accelerator using NVidia CUDA technology. The dependences of acceleration of parallel computations as compared with sequential ones were explored for different numbers of boundary elements and computational nodes. A significant acceleration (up to 52 times) calculation of the potential distribution without loss in accuracy is shown. Acceleration of up to 22 times was achieved in calculation of mutual influence matrix for boundary elements. Using CUDA technology allows to attain significant acceleration without loss in accuracy and convergence. So application of CUDA is a good way to parallelizing BEM. Application of developed approach allows to solve problems in different areas of physics such as acoustics, hydromechanics, electrodynamics, mechanics of solids and many other areas, efficiently.

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Huang, Yong-Xuan y Jerry Chou. "A Survey of NFV Network Acceleration from ETSI Perspective". Electronics 11, n.º 9 (2 de mayo de 2022): 1457. http://dx.doi.org/10.3390/electronics11091457.

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Network function virtualization (NFV) enables network operators to save costs and flexibility by replacing dedicated hardware with software network functions running on commodity servers. There is a high need for network acceleration to achieve performance comparable to hardware, which is vital for the implementation of NFV. The necessity of NFV acceleration stems from the lengthy packet delivery path following virtualization and the unavailability of generic operating system designs to serve network-specific scenarios. Therefore, the software approach alters the operating system’s processing architecture through Kernel Bypass or offload packet processing to hardware. A typical classification scheme divides it into two main categories based on technology with software and hardware. Only these two categories can be utilized to rapidly and easily establish a classification system. However, it is difficult to suggest the specifics and peculiarities of any acceleration approach during real-world operation. For a more comprehensive classification of NFV acceleration, we refer to the ETSI NFV architectural framework in this research. As the framework clearly illustrates, the technical infrastructure layer of NFV and the corresponding management roles provides a comprehensive and intuitive view of the differences between these acceleration technologies, solutions, and initiatives. Additionally, we conducted an analysis to identify opportunities for improvement in existing solutions and propose new research programs. We expect that NFV will increasingly rely on cloud services in the future. Since cloud services do not offer a choice of hardware, our acceleration method will be primarily software-based.

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40

Smith, Matthew, Arjen Tamerus y Phil Hasnip. "Portable Acceleration of Materials Modeling Software: CASTEP, GPUs, and OpenACC". Computing in Science & Engineering 24, n.º 1 (1 de enero de 2022): 46–55. http://dx.doi.org/10.1109/mcse.2022.3141714.

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41

Sukhwani, Bharat, Mathew Thoennes, Hong Min, Parijat Dube, Bernard Brezzo, Sameh Asaad y Donna Dillenberger. "A Hardware/Software Approach for Database Query Acceleration with FPGAs". International Journal of Parallel Programming 43, n.º 6 (28 de octubre de 2014): 1129–59. http://dx.doi.org/10.1007/s10766-014-0327-4.

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42

Xie, Jun Hui y Jian Chang Yuan. "Vibration Analysis of Needle-Punching Machine Slider-Crank Mechanism". Applied Mechanics and Materials 215-216 (noviembre de 2012): 730–34. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.730.

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After analysis of the movement characteristics of needle-punching machine slider-crank mechanism in theory, a slider-crank mechanism acceleration curve had been rendered by MATLAB software and acceleration movement curve had been drawn after the measurement of acceleration of slider-crank mechanism by ADAMS simulation software. Through the comparison between the two results, a conclusion had been drawn. Finally, 3 advice of minishing vibration had been given according to the conclusion of calculation of acceleration by Quality Substitution Method,the first advice is the quality and site of the balance block are chose appropriately,the second advice is the weight of the slider and the connecting rod need to be reduced by choosing appropriate material.

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43

Karp, Alan H. "Speeding up N-body Calculations on Machines without Hardware Square Root". Scientific Programming 1, n.º 2 (1992): 133–40. http://dx.doi.org/10.1155/1992/974623.

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The most time consuming part of an N-body simulation is computing the components of the accelerations of the particles. On most machines the slowest part of computing the acceleration is in evaluating r-3/2, which is especially true on machines that do the square root in software. This note shows how to cut the time for this part of the calculation by a factor of 3 or more using standard Fortran.

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Tang, Qirong, Le Liang, Jianhua Xie, Yinghao Li y Zhenqiang Deng. "Task-priority redundancy resolution on acceleration level for underwater vehicle-manipulator system". International Journal of Advanced Robotic Systems 14, n.º 4 (1 de julio de 2017): 172988141771982. http://dx.doi.org/10.1177/1729881417719825.

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A task-priority redundancy resolution with restoring moments optimized on acceleration level for the underwater vehicle-manipulator system is investigated in this article. Redundant resolution is a key and difficult problem in underwater vehicle-manipulator system’s trajectory planning. Firstly, kinematic modeling and dynamic modeling based on Lagrange method are studied. To overcome acceleration’s sudden change in traditional task-priority method, a new redundancy resolution method on the acceleration level is proposed. In this approach, a scalar potential function is established and used for reducing the effect of restoring moments by applying gradient projection. Finally, simulation is performed to verify the effectiveness of the proposed approach by comparing with traditional approaches.

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45

Gandomi, Mostafa, Ali R. Kashani, Ali Farhadi, Mohsen Akhani y Amir H. Gandomi. "Spectral acceleration prediction using genetic programming based approaches". Applied Soft Computing 106 (julio de 2021): 107326. http://dx.doi.org/10.1016/j.asoc.2021.107326.

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Nguyen, Kien Dinh y Dong Lam Vu. "Seismic Analysis of AP1000 Nuclear Island Structure by Using the Finite Element Software ANSYS". Science and Technology Development Journal 20, K2 (30 de junio de 2017): 14–23. http://dx.doi.org/10.32508/stdj.v20ik2.444.

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Seismic analysis of AP1000 nuclear island structure by using the commercial finite element software ANSYS is presented. Using the ANSYS Workbench, a sophisticated threedimensional finite element model of the structure is created and employed in the analysis. Dynamic response of the structure to both the one-directional and three-directional acceleration time histories are considered in the analysis. The time histories for the relative displacement, velocity and absolute acceleration of the structure are obtained for various earthquakes, including American El Centro, Japanese Kobe and Vietnamese Dien Bien earthquakes. The numerical results show that the dynamic characteristics obtained by using one-directional and thee-directional acceleration time histories are different, and the three three-directional acceleration time histories should be employed in the seismic analysis. The result also reveals that the nuclear island is safer in Dien Bien earthquake that it is in El Centro and Kobe earthquakes. The distribution of the von Mises stresses of the structure according to the maximum displacement at the top point is also examined and highlighted.

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47

Beisembayev, Akambay, Anargul Yerbossynova, Petro Pavlenko y Mukhit Baibatshayev. "Planning trajectories of a manipulation robot with a spherical coordinate system for removing oxide film in the production of commercial lead, zinc". Eastern-European Journal of Enterprise Technologies 4, n.º 2 (124) (31 de agosto de 2023): 80–89. http://dx.doi.org/10.15587/1729-4061.2023.286463.

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The object of this study is the technological operation of removing the oxide film from the surface of the metal melt, foundry production of commercial lead, zinc. To carry out the robotization of this technological operation, it is proposed to use a manipulation robot with a spherical coordinate system. A kinematic structure of a manipulation robot with six degrees of mobility and two arms is proposed. On the first arm of the manipulation robot, a movable blade is fixed, and on the second arm, a rotary blade is fixed. With the translational movement of the first hand, the movable blade rakes the oxide film onto the rotary blade. Further, the oxide film collected on the rotary blade is thrown into a special container with a rotational movement. Restrictions are introduced on the values of generalized coordinates, velocities, and accelerations for each degree of mobility of the manipulation robot. Taking into account these limitations, for the implementation of this process, software trajectories have been developed for the degrees of mobility of the manipulation robot, which are approximated by quadratic polynomials. Each program movement is divided into three sections, in the first section acceleration with a given acceleration is carried out, in the second section movement with a given speed, in the third section braking with a given acceleration. To assess the reliability of the developed software trajectories, simulations were carried out in the MatLab software environment, version R2015b. The resulting graphs of program trajectories coincide with the calculated values of the generalized coordinates, time intervals, speeds, and accelerations of change in the generalized coordinates in terms of the degrees of mobility of the manipulation robot. The period of time required to remove the oxide film is 15.88 s. On the basis of the results obtained, a cyclogram for controlling a manipulation robot was built to perform the technological operation of removing the oxide film in the production of commercial lead, zinc

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Zhang, Duo Li, Xue Peng Yang y Yu Kun Song. "Design and Implementation of a Large Points FFT Acceleration Unit in Multi-Processor System Based on FPGA". Applied Mechanics and Materials 347-350 (agosto de 2013): 1793–98. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.1793.

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This paper introduces the design and implementation of a large points FFT acceleration unit of multi-processor system based on FPGA. It introduces radix-2 DIT-FFT algorithm and the features of hardware platform. It analyzes the FFT acceleration unit overall and divides it into several modules. Then hardware implementations of modules are discussed. The whole FFT acceleration unit is a part of one multi-processor image processing system and the whole system is tested by software and hardware co verification. Results are verified between the software simulation and Virtex6 evaluation board of Xilinx Company. The results are compatible in the range of error. The FFT acceleration unit meets the needs of the whole system and the design is successful.

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Gasparov, Erik S., Gevorg A. Marcosyan y Olga Yu Kazakova. "Study of the dependence of the natural frequencies of a rotor system with a vertically positioned rotor on the preload". Vestnik of Samara State Technical University. Technical Sciences Series 31, n.º 2 (1 de agosto de 2023): 118–28. http://dx.doi.org/10.14498/tech.2023.2.9.

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The article discusses the possibility of using a method for determining the preload force for trust and radial bearings of spindle assemblies for high-speed milling. Previously, a method was developed and tested for determining the preload force of bearing supports on high-speed grinding electrospindles with a horizontal spindle. The object of study is a support with angular contact bearings 7004 ACD_P4A SKF and a vertical rotor. An information-measuring system has been developed, which consists of PCB 352C34 vibration acceleration sensors, a Vishay 614 force sensor, an NI-cRIO-9056 controller, NI 9250, NI 9237 and NI 9481 modules, and software written in the National Instruments Labview language. The system of test actions has been improved due to its automation. Test effects began to be carried out using a solenoid with a core, which was controlled by an NI controller and developed software. Due to this, the same time delay was formed between the test action and the start of recording the vibration acceleration signal. Vibration acceleration signals are obtained for the entire preload range. To study the controllability of the unit, two vibration acceleration sensors were used: with a parallel and perpendicular arrangement of the axes of the direction of vibration and test action. For the first and second groups of vibration accelerations, spectral transformations were carried out, and the amplitude-frequency characteristics of the assembly were obtained for the entire range of preload values. As a result of the work, it was concluded that the presented methodology and criteria are applicable to high-speed milling spindle assemblies with a vertical rotor. It is also shown that this technique can be automated.

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Kakay, Pricillia Patrecia, Novie Evelyn Renyaan, Yohana Ririhena, Altje Latununuwe, Estevanus Kristian Huliselan y Sarlota Singerin. "Pengembangan Peralatan Eksperimen Gerak Lurus Beraturan (GLB) Berbasis Smartphone". PHYSIKOS Journal of Physics and Physics Education 1, n.º 2 (30 de diciembre de 2022): 69–74. http://dx.doi.org/10.30598/physikos.1.2.8540.

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Smartphone-based experimental equipment has been successfully developed for measuring a straight motion at a constant velocity. Read the data that comes out on the smartphone using the Accelerator Monitor software. The data is in graphic form. From the graph, it can be seen that the acceleration is zero. Furthermore vary the displacement distance, which is 100 cm and 130 cm to measure the velocity of the toy cars. The results showed that the time taken was 5 seconds and 6.5 seconds respectively for a displacement of 100 cm and 130 cm. The calculation of the velocity value for both displacements is the same value of 20 cm⁄s. This shows that the velocity value is constant which is equal to the graph results showing zero acceleration.

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