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Modelling of a wave energy converter array with non‐linear power take‐off using a mixed time‐domain/frequency‐domain method
Published 2021-10-01“…Abstract A mixed time‐domain/frequency‐domain method is proposed for modelling dense wave energy converter (WEC) arrays with non‐linear power take‐off (PTO). The model is based on a harmonic balance method which describes the system response in the frequency domain, while evaluating the non‐linear PTO force and solving the system equations of motion in the time domain. …”
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Frequency-Domain Characterization of Finite Sample Linear Systems with Uniform Window Inputs
Published 2025-01-01“…We discuss determining a finite sample linear time-invariant (FS-LTI) system’s impulse response function, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>h</mi><mo>[</mo><mi>n</mi><mo>]</mo><mo>,</mo></mrow></semantics></math></inline-formula> in the frequency domain when the input testing function is a uniform window function with a width of <i>L</i> and the output is limited to a finite number of effective samples, <i>M</i>. …”
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43
Innovative approaches to beam forming antenna array systems with adaptive Partial Update NLMS algorithms
Published 2024-12-01“…For the most part, we will be discussing PU Normalized Least Mean Square (PU NLMS) algorithms like M-max NLMS, Periodic-NLMS, and Stochastic-NLMS. Using a Uniform Linear Array (ULA) Antennas in a simulation environment, we find that the, in terms of Mean Square Error (MSE), convergence rate, and steady-state error, it is evident that all PU NLMS algorithms (with the exception of Periodic-NLMS) had performed close, and approximately equivalent performance to the full band NLMS algorithms. …”
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Phase Error Correction in Sparse Linear MIMO Radar Based on the Equivalent Phase Center Principle
Published 2024-10-01“…In addition, this paper designs a sparse linear MIMO array with a periodic structure, which reduces the number of transmitting and receiving units, system complexity, and hardware costs. …”
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A Low Complexity Linear Precoding Method for Extremely Large-Scale MIMO Systems
Published 2025-01-01“…As a result, spatial non-stationary features emerge as users view just a section of the antenna array, known as the visibility regions (VRs). The XL-MIMO systems can achieve higher spectral efficiency, improve cell coverage, and provide significantly higher data rates than standard MIMO systems. …”
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46
Application of Non-Linear System Model Updating Using Feature Extraction and Parameter Effects Analysis
Published 2001-01-01“…Also included in this method is the investigation of linear parameter effect screening using a partial factorial variable array for simulation. …”
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47
Flexible Hierarchical Multi-Beam Search Algorithm for Millimeter-Wave 3D MIMO Systems With Uniform Planar Arrays
Published 2025-01-01“…Thus, it overcomes the limitations of existing hierarchical codebooks, which mostly support uniform linear arrays with an antenna count that is a power of an integer. …”
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48
Low Energy Consumption Photoelectric Memristors with Multi-Level Linear Conductance Modulation in Artificial Visual Systems Application
Published 2025-07-01“…Highlights Developed a novel photo-memristor with single-pulse low energy consumption (187 pJ) and multi-pulse linearity up to 0.996. Using photoelectric synaptic characteristics, achieved long-term memory in a 3 × 3 array and over 92% activation of female facial feature recognition in a 64 × 64 model. …”
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49
Proposing and Dynamical Analysis of a Hyperjerk Piecewise Linear Chaotic System with Offset Boostable Variable and Hidden Attractors
Published 2021-01-01“…In this article, a piecewise linear (PWL) term is employed to modify a simple chaotic system and obtain a new chaotic model. …”
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50
DOA Estimation by Feature Extraction Based on Parallel Deep Neural Networks and MRMR Feature Selection Algorithm
Published 2025-01-01“…The results by computer simulations on a uniform linear array show that the proposed structure significantly increases the accuracy of DOA estimation and is more robust to changes in input parameters than traditional algorithms, such as estimation of signal parameters via invariant rotation (ESPRIT), classification of multiple signals (MUSIC), and DNN method. …”
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51
A Millimeter-Wave Phased Array-Aided 5G Communication Prototype: Evaluation in an Indoor Scenario
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52
Development of a High-Frequency Ophthalmic Real-Time Ultrasound Imaging System Based on a 20 MHz Annular-Array Transducer
Published 2024-01-01“…A single-element transducer is adopted in the traditional ophthalmic ultrasound imaging systems. Although full depth focusing can be achieved using a linear-array transducer, it is unsuitable for ophthalmic imaging due to its inability to be tightly coupled to the eyeball and its higher cost. …”
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Multifunctional Reconfigurable Millimeter-Wave Array Antenna
Published 2025-01-01“…Furthermore, the system achieves a reconfigurable frequency interface between circular and linear polarizations, enhancing its adaptability to diverse communication scenarios. …”
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54
A Novel Method for Extending Dynamic Range in Time-Division-Multiplexing Linear Sagnac Systems Based on Time Slot Insertion
Published 2025-01-01“…The time-division multiplexed linear Sagnac sensing system significantly reduces the cost of interferometric fiber-optic sensor arrays and holds substantial potential for engineering applications. …”
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55
Design and Hardware Implementation of a Highly Flexible PRNG System for NIST-Validated Pseudorandom Sequences
Published 2025-05-01“…Each resulted in a <i>P-value</i> greater than 0.01, confirming the pseudo-randomness of the generated sequences. The system is implemented on a reconfigurable device FPGA (Field Programmable Gate Array), with a low occupancy percentage, demonstrating its feasibility for various applications.…”
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Flexible Screen-Printed Gold Electrode Array on Polyimide/PET for Nickel(II) Electrochemistry and Sensing
Published 2025-06-01Get full text
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58
A Multi-Polarized Reconfigurable Plasma Antenna Array
Published 2023-01-01“…Antenna arrays can be classified into linear and circular polarization by quickly adjusting the phase difference between vibrators. …”
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ULTRA-WIDEBAND SCANNING ANTENNA ARRAY WIRE EMITTERS
Published 2019-12-01“…The reduced antenna array has a number of design advantages and can be used in systems with ultra-wideband signals.…”
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Using Microphone Arrays to Detect Moving Vehicle Velocity
Published 2013-09-01“…Building on this idea, the present study investigates the capabilities of a microphone array system to identify the position and velocity of a vehicle travelling on a previously established route. …”
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