Lithium-ion battery quickly developed into a new generation of energy because of its advantages of small selfdischarge, large energy density, good safety and memory-memory *** impedance spectroscopy (EIS) measurements...
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ISBN:
(纸本)9781665409841
Lithium-ion battery quickly developed into a new generation of energy because of its advantages of small selfdischarge, large energy density, good safety and memory-memory *** impedance spectroscopy (EIS) measurements are widely used in the performance evaluation of lithium-ion batteries. At present, the traditional AC impedance spectrum test instrument uses sweeps, which has disadvantages such as long test time and expensive price. This design uses the fieldprogrammable gate array (FPGA) as the controller drive peripheral module. Based on the fast Fourier transform (FFT) measurement method, the upper computer software is developed for data processing and impedance spectrum mapping. The design is mainly divided into FPGA control logic and upper computer software. FPGA control logic adopts modular design. The top level is divided into data analysis module, control module, signal occurrence module, analog to digital conversion module, FIFO cache module and USB communication module to realize superimposed sine signal occurrence, data acquisition and communication with upper computer. The upper computer software design is based on the Visual Studio development environment, developed using C # and Windows Form, realizing the function of data sending and receiving, data processing, and impedance spectrum mapping. This design verified the reproducibility of the system using multiple measurements, yielding the standard deviation of multiple measurements. The accuracy of the system was verified using a comparison with the acquisition card-based measurement device. The results show that this system can be used as a tool to measure the impedance spectrum of lithium-ion batteries.
Quantum computing is emerging as an important (but radical) technology that might take us beyond Moore's law for certain applications. Today, in parallel with improving quantum computers, computer scientists are r...
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The rapid evolution of low-power applications in VLSI design calls for innovative transistor technologies that are capable of meeting stringent energy efficiency requirements. Carbon Nanotube field-Effect Transistors ...
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As a heterogeneous computing architecture, FPGA accelerators are widely used for AI and other fields. Compared with traditional CPU clusters, the architecture of the virtual FPGA cluster is relatively simple, and thus...
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Efficient depth image reconstruction from sparse samples is crucial for machine perception applications, such as robotics, vehicle assistance and autonomy. It demands fast processing speed with low power consumption f...
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Network traffic measurement keeps track of the amount of traffic sent by each flow in the network. It is a core functionality in applications such as traffic engineering and network intrusion detection. In high-speed ...
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ISBN:
(纸本)9781665437592
Network traffic measurement keeps track of the amount of traffic sent by each flow in the network. It is a core functionality in applications such as traffic engineering and network intrusion detection. In high-speed networks, it is impossible to keep an exact count of the flow traffic, due to limitations with respect to memory and computational speed. Therefore, probabilistic data structures, such as sketches, are used. This paper proposes Approximate Count-MM sketch or A-CM sketch, a novel variant of the Count-MM sketch algorithm that uses less memory and has a higher throughput compared to other FPGA-based sketch implementations. A-CM sketch relies on optimizations at two levels: (1) it uses approximate counters and the newly proposed Hardware-oriented Simple Active Counter algorithm to efficiently implement these counters;(2) it uses a distribution of the embedded memory, optimized towards maximum operating frequency. To the best of our knowledge, A-CM sketch outperforms all other FPGA-based sketch implementations.
This research addresses the challenges faced by space applications due to high-energy ionizing particles in the space environment, particularly when using commercial Off-The-Shelf (COTS) components like field Programm...
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ISBN:
(纸本)9798400704925
This research addresses the challenges faced by space applications due to high-energy ionizing particles in the space environment, particularly when using commercial Off-The-Shelf (COTS) components like fieldprogrammable Gate Arrays (FPGAs) and soft-core processors like RISC-V. Our study introduces a methodology for evaluating the reliability of a state-of-the-art RISC-V processor intended for space missions, establishing a connection between space conditions, Single Event Upset (SEU) fault estimation, and emulation. Focusing on the space environment around a telecommunication satellite, we analyze particle fluxes and their impact on SRAM-based FPGAs using proton radiation test data. By integrating this data, we estimate the SEU rate per mission day caused by the specific radiation environment. Subsequently, we assess the suitability of the NEORV32 processor for operation in such an environment by implementing it in the target FPGA and conducting SEU emulation through fault injection campaigns. Our primary goal is to determine the design mean time to failure within the space environment where the processor is expected to function, a critical metric for implementing effective mitigation strategies for space mission designs. The obtained results, covering worst-case scenarios, suggest that RISC-V-based architectures prove resilient and adaptable for successful deployment in space missions.
As fieldprogrammable Gate Arrays (FPGAs) become large integration, the area reduction of a Basic logic Element (BLE), which is a circuit for a logical definition in FPGAs, is required. We have studied a Variable Logi...
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In industries, three-phase inductive loads such as induction motors are widely used due to their low cost, easy maintenance, reliability, and robustness. Due to inductive loads, the power factor is reduced which resul...
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Nuclear power plants use uranium fuel, consisting of solid ceramic pellets of cylindrical shape with 18 mm diameter and 14 mm height, which are manufactured by various metallurgical processes. The pellets ar...
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