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1,905 Results Found

  • Article
  • Open Access
4 Citations
2,864 Views
22 Pages

RETRACTED: Geometric Construction of Video Stereo Grid Space

  • Huangchuang Zhang,
  • Ruoping Shi and
  • Ge Li

13 May 2022

The construction of digital twin cities is a current research hotspot. Video data are one of the important aspects of digital twin cities, and their digital modeling is one of the important foundations of its construction. For this reason, the constr...

  • Article
  • Open Access
6 Citations
5,136 Views
18 Pages

Grid-Following Inverter-Based Resource: Numerical State–Space Modeling

  • Abdullah Alassaf,
  • Ibrahim Alsaleh,
  • Ayoob Alateeq and
  • Hamoud Alafnan

22 May 2023

In the pursuit of a sustainable electric power system, the integration of renewable energy sources and distributed energy resources is gradually replacing traditional power generation. These new resources are integrated into the grid via inverters, w...

  • Article
  • Open Access
7 Citations
2,757 Views
13 Pages

7 July 2023

Leak detection and localization of liquid or gas is of great significance to avoid potential danger and reduce the waste of resources. Leak detection and localization methods are varied and uniquely suited to specific application scenarios. The exist...

  • Article
  • Open Access
4 Citations
1,967 Views
18 Pages

11 August 2022

Space-time adaptive processing (STAP) algorithms based on sparse recovery (SR) have been researched because of their low requirement of training snapshots. However, once some portion of clutter is not located on the grids, i.e., off-grid problems, th...

  • Article
  • Open Access
11 Citations
5,275 Views
17 Pages

Parking Space and Obstacle Detection Based on a Vision Sensor and Checkerboard Grid Laser

  • Shidian Ma,
  • Zhongxu Jiang,
  • Haobin Jiang,
  • Mu Han and
  • Chenxu Li

9 April 2020

The accuracy of automated parking technology that uses ultrasonic radar or camera vision for obstacles and parking space identification can easily be affected by the surrounding environment especially when the color of the obstacles is similar to the...

  • Article
  • Open Access
1 Citations
2,174 Views
20 Pages

3 August 2022

Insufficient bearing capacity of compression bars in space grid structures can significantly reduce the collapse resistance of structures and cause immeasurable losses. Reactive powder concrete (RPC) with high strength, micro-expansion, and good duct...

  • Article
  • Open Access
7 Citations
3,600 Views
17 Pages

Automatic Space Analysis Using Laser Scanning and a 3D Grid: Applications to Industrial Plant Facilities

  • Donghyun Kim,
  • Soonwook Kwon,
  • Chung-Suk Cho,
  • Borja García de Soto and
  • Daeyoon Moon

31 October 2020

While industrial plant projects are becoming bigger, and global attention to the plant as a construct is increasing, space arrangement in plant projects is inefficient because of the complex structure of required facilities (e.g., complex MEP (mechan...

  • Article
  • Open Access
7 Citations
3,013 Views
17 Pages

14 April 2021

Low-frequency multi-source direction-of-arrival (DOA) estimation has been challenging for micro-aperture arrays. Deep learning (DL)-based models have been introduced to this problem. Generally, existing DL-based methods formulate DOA estimation as a...

  • Article
  • Open Access
9 Citations
3,857 Views
18 Pages

13 August 2019

The utilization of three-level T-type (3L T-type) inverters in finite set-model predictive control (FS-MPC) of grid-connected systems yielded good performance in terms of current ripples and total harmonic distortions. To further improve the system&r...

  • Article
  • Open Access
4 Citations
2,013 Views
20 Pages

Flow Field Pattern and Hydrodynamic Characteristics of a Grid Device Made with Various Grid Bar Spacings at Different Inclination Angles

  • Can Zhang,
  • Hao Tang,
  • Nyatchouba Nsangue Bruno Thierry,
  • Liqiang Yin,
  • Feng Zhang,
  • Meixi Zhu,
  • Chenxu Shan,
  • Liuxiong Xu and
  • Fuxiang Hu

11 October 2023

The grid is a crucial component in constructing grid-type bycatch reduction devices. The grid’s structural characteristics and orientation significantly impact the hydrodynamic characteristics and efficacy of the separation device. Therefore, i...

  • Article
  • Open Access
68 Views
21 Pages
Buildings2026, 16(5), 966;https://doi.org/10.3390/buildings16050966 
(registering DOI)

1 March 2026

Optimal sensor placement (OSP) for structural health monitoring of large-scale space grid structures must enable reliable identification of localized member deterioration with sparse instrumentation. Modal-based OSP criteria optimize observability of...

  • Article
  • Open Access
12 Citations
4,216 Views
6 Pages

On the Probabilistic Deployment of Smart Grid Networks in TV White Space

  • Angela Sara Cacciapuoti,
  • Marcello Caleffi and
  • Luigi Paura

10 May 2016

To accommodate the rapidly increasing demand for wireless broadband communications in Smart Grid (SG) networks, research efforts are currently ongoing to enable the SG networks to utilize the TV spectrum according to the Cognitive Radio paradigm. To...

  • Review
  • Open Access
9 Citations
6,130 Views
19 Pages

Vehicle-to-grid (V2G) technology has received a lot of attention as a smart interconnection solution between electric vehicles and the grid. This paper analyzes the relevant research progress and hotpots of V2G by using CiteSpace 6.1.R6 software to c...

  • Article
  • Open Access
3 Citations
3,024 Views
19 Pages

14 April 2020

The bow echo, a mesoscale convective system (MCS) responsible for much hail and wind damage across the United States, is associated with poor skill in convection-allowing numerical model forecasts. Given the decrease in convection-allowing grid spaci...

  • Article
  • Open Access
14 Citations
6,509 Views
17 Pages

A Space-Interconnection Algorithm for Satellite Constellation Based on Spatial Grid Model

  • Shuang Li,
  • Kaihua Hou,
  • Chengqi Cheng,
  • Shizhong Li and
  • Bo Chen

2 July 2020

With the rapid development of large-scale satellite constellations and the increasing demand for rapid communication and emergency rescue using global satellite-based Internet, there have been new requirements for efficient algorithms for inter-commu...

  • Article
  • Open Access
6 Citations
2,767 Views
28 Pages

A Block Hybrid Method with Equally Spaced Grid Points for Third-Order Initial Value Problems

  • Salma A. A. Ahmedai Abd Allah,
  • Precious Sibanda,
  • Sicelo P. Goqo,
  • Uthman O. Rufai,
  • Hloniphile Sithole Mthethwa and
  • Osman A. I. Noreldin

In this paper, we extend the block hybrid method with equally spaced intra-step points to solve linear and nonlinear third-order initial value problems. The proposed block hybrid method uses a simple iteration scheme to linearize the equations. Numer...

  • Article
  • Open Access
23 Citations
6,056 Views
17 Pages

Hybrid Spatial Data Model for Indoor Space: Combined Topology and Grid

  • Zhiyong Lin,
  • Zhimin Xu,
  • Dan Hu,
  • Qinwu Hu and
  • Wenjing Li

The construction and application of an indoor spatial data model is an important prerequisite to meet the requirements of diversified indoor spatial location services. The traditional indoor spatial topology model focuses on the construction of topol...

  • Article
  • Open Access
370 Views
16 Pages

The conventional Two-Step Floating Catchment Area (2SFCA) method treats large-scale facilities as single centroids, leading to systematic under- and overestimation of spatial accessibility measures. To address this limitation, this study proposes a G...

  • Article
  • Open Access
20 Citations
4,338 Views
20 Pages

22 September 2022

With an ever-increasing number of electric vehicles (EVs) on the roads, there is a high demand for EV charging infrastructure. The present charging infrastructure in the market requires a lot of space and sometimes leads to traffic congestion, increa...

  • Review
  • Open Access
22 Citations
4,738 Views
25 Pages

State-Space Modeling Techniques of Emerging Grid-Connected Converters

  • Fabio Mandrile,
  • Salvatore Musumeci,
  • Enrico Carpaneto,
  • Radu Bojoi,
  • Tomislav Dragičević and
  • Frede Blaabjerg

15 September 2020

In modern power electronics-based power systems, accurate modeling is necessary in order to analyze stability and the interaction between the different elements, which are connected to it. State space modeling seems a valid approach to study the mode...

  • Article
  • Open Access
2 Citations
3,050 Views
15 Pages

Suitable space vector modulation (SVM) with reduced high-frequency common-mode voltages (HF-CMVs) for grid-connected current-source inverters (CSIs) have not been well investigated yet. In this study, the potential of active zero-state SVM (AZS-SVM)...

  • Article
  • Open Access
2,097 Views
15 Pages

31 October 2022

Due to rising fossil fuel costs, electricity tariffs are also increasing. This is motivating users to install nanogrid systems to reduce their electricity bills using solar power. However, the two main constraints for a solar system installation are...

  • Article
  • Open Access
3 Citations
3,157 Views
31 Pages

3 June 2025

With the large-scale integration of renewable energy sources, power electronic components within power grids have surged. Traditional synchronous generator-based power generation is gradually transitioning to renewable energy generation integrated wi...

  • Article
  • Open Access
11 Citations
3,803 Views
19 Pages

Small-Signal Stability of Hybrid Inverters with Grid-Following and Grid-Forming Controls

  • Xiaotong Ji,
  • Dan Liu,
  • Kezheng Jiang,
  • Zhe Zhang and
  • Yongheng Yang

29 March 2024

In the modern power grid, characterized by the increased penetration of power electronics and extensive utilization of renewable energy, inverter-based power plants play a pivotal role as the principal interface of renewable energy sources (RESs) and...

  • Article
  • Open Access
2 Citations
1,545 Views
21 Pages

A Reduced Sparse Dictionary Reconstruction Algorithm Based on Grid Selection

  • Zhiqi Gao,
  • Caimei Zhao,
  • Pingping Huang,
  • Wei Xu and
  • Weixian Tan

24 February 2024

A sparse dictionary reconstruction algorithm based on grid selection is introduced to solve the grid mismatch when using the sparse recovery space time adaptive processing (SR-STAP) algorithm. First, the atom most closely related to clutter is select...

  • Article
  • Open Access
32 Citations
13,128 Views
24 Pages

Hierarchical Hexagonal Clustering and Indexing

  • Vojtěch Uher,
  • Petr Gajdoš,
  • Václav Snášel,
  • Yu-Chi Lai and
  • Michal Radecký

28 May 2019

Space-filling curves (SFCs) represent an efficient and straightforward method for sparse-space indexing to transform an n-dimensional space into a one-dimensional representation. This is often applied for multidimensional point indexing which brings...

  • Article
  • Open Access
6 Citations
2,916 Views
18 Pages

A Scheduling Method of Using Multiple SAR Satellites to Observe a Large Area

  • Qicun Zheng,
  • Haixia Yue,
  • Dacheng Liu and
  • Xiaoxue Jia

22 March 2023

This paper presents a scheduling problem of using multiple synthetic aperture radar (SAR) satellites to observe a large irregular area (SMA). SMA is usually considered as a kind of nonlinear combinatorial optimized problem and its solution space stro...

  • Proceeding Paper
  • Open Access
7 Citations
1,750 Views
6 Pages

Linear Quadratic Gaussian Design in a Grid-Connected and Islanded Microgrid System for Stability Enrichment

  • Sureshraj Se Pa,
  • Mohamed Badcha Yakoob,
  • Muthuveerappan Seetharaman,
  • Jenita Daniel Victor,
  • Kasthuri Arumugam and
  • Srimathi Muthukumaran

This paper proposes a Linear Quadratic Gaussian (LQG) control design for a grid-connected and Islanded mode Microgrid composed of a single-network feeding and forming converter with one local load. The LQG controller was designed for two different Mi...

  • Article
  • Open Access
1 Citations
3,032 Views
18 Pages

15 August 2022

When the transmitter is in motion, the airborne passive bistatic radar (PBR) has a complex clutter geometry and lacks independent and identically distributed training samples in clutter estimation and suppression. In order to solve these problems, th...

  • Article
  • Open Access
23 Citations
5,586 Views
24 Pages

6 October 2022

Melbourne’s Chinatown is the oldest in Australia. A large amount of research on this unique ethnic enclave has been conducted to elucidate its formation history, heritage significance, cultural influence and architectural features. However, the...

  • Article
  • Open Access
16 Citations
7,830 Views
21 Pages

18 May 2015

DEM-based topographic characterization and quantification of surface depression storage are critical to hydrologic and environmental modeling. Mixed conclusions have been obtained from previous studies on the relationship between maximum depression s...

  • Article
  • Open Access
3 Citations
2,013 Views
14 Pages

11 April 2024

This work deals with doubly fed induction generator (DFIG) modeling and stability when connected to weak AC grids. A detailed state-space model that includes the phase-locked loop (PLL) is developed. This work aims to determine the influence of the n...

  • Article
  • Open Access
6 Citations
2,087 Views
20 Pages

Impact of Synchronous Condensers’ Ratings on Mitigating Subsynchronous Oscillations in Wind Farms

  • Dimitrios Dimitropoulos,
  • Mohammad Kazem Bakhshizadeh,
  • Lukasz Kocewiak,
  • Xiongfei Wang and
  • Frede Blaabjerg

4 April 2024

Subsynchronous oscillations have occurred in wind farms due to the high penetration of converter-based technology in power systems and may potentially lead to grid instability. As an effective solution, synchronous condensers, with their ability to c...

  • Article
  • Open Access
4 Citations
3,328 Views
21 Pages

A Permeability Estimation Method Based on Elliptical Pore Approximation

  • Shuaishuai Wei,
  • Kun Wang,
  • Huan Zhang,
  • Junming Zhang,
  • Jincheng Wei,
  • Wenyang Han and
  • Lei Niu

20 November 2021

Digital rock images may capture more detailed pore structure than the traditional laboratory methods. No explicit function can correlate permeability accurately for flow within the pore space. This has motivated researchers to predict permeability th...

  • Article
  • Open Access
54 Citations
7,562 Views
19 Pages

22 April 2019

The bolted spherical joint (BSJ) has wide applications in various space grid structures. The bar and the bolted sphere are connected by the high-strength bolt inside the joint. High-strength bolt is invisible outside the joint, which causes the diffi...

  • Article
  • Open Access
10 Citations
2,718 Views
23 Pages

Predictive Models for Aggregate Available Capacity Prediction in Vehicle-to-Grid Applications

  • Luca Patanè,
  • Francesca Sapuppo,
  • Giuseppe Napoli and
  • Maria Gabriella Xibilia

The integration of vehicle-to-grid (V2G) technology into smart energy management systems represents a significant advancement in the field of energy suppliers for Industry 4.0. V2G systems enable a bidirectional flow of energy between electric vehicl...

  • Article
  • Open Access
2 Citations
2,100 Views
12 Pages

4 January 2023

Bolted spherical joints are widely used in space grid structures. However, the preload loss, which may arise from fabrication error, insufficient twist of the screw and some other unknown reasons can undermine the structural integrity and even lead t...

  • Article
  • Open Access
5 Citations
4,676 Views
16 Pages

6 June 2018

In a DC distribution system configured by AC/DC power conversion system (PCS), the voltage control performance of the AC/DC PCS determines the stability and reliability of the DC distribution grid. The DC voltage of grid is maintained by capacitor, t...

  • Article
  • Open Access
4 Citations
2,940 Views
18 Pages

13 December 2019

This paper introduces a new approach to bistatic radar tomographic imaging based on the concept of compressive sensing and sparse reconstruction. The field of compressive sensing has established a mathematical framework which guarantees sparse soluti...

  • Article
  • Open Access
15 Citations
7,563 Views
26 Pages

20 December 2019

This paper proposes detailed and practical guidance on applying model-based design (MBD) for voltage and frequency stability assessments, control tuning and verification of off-grid hybrid power plants (HPPs) comprising both grid-forming and grid-fee...

  • Article
  • Open Access
1 Citations
2,178 Views
17 Pages

9 January 2023

Power electronic converters are used for an efficient and controlled conversion of power generated from renewable energy sources and can interface generated power to the grid. Among available power converters, voltage source inverters (VSIs) have bee...

  • Article
  • Open Access
26 Citations
6,070 Views
24 Pages

18 May 2017

This paper investigates the performance of a fault-tolerant four-switch three-phase (FSTP) grid-side converter (GSC) in a doubly-fed induction generator-based wind turbine (DFIG-WT). The space vector pulse width modulation (SVPWM) technique is simpli...

  • Article
  • Open Access
6 Citations
2,980 Views
18 Pages

Intrinsic Properties of Composite Double Layer Grid Superstructures

  • Shahrokh Maalek,
  • Reza Maalek and
  • Bahareh Maalek

This paper examined the opportunities of composite double-layer grid superstructures in short-to-medium span bridge decks. It was empirically shown here that a double-layer grid deck system in composite action with a thin layer of two−way reinf...

  • Article
  • Open Access
4 Citations
3,156 Views
28 Pages

13 April 2023

Mastering the relationship between urban landmarks and urban space morphology in urban planning, landscape planning, and architectural design helps maintain the intelligibility of compact urban districts. The objective of the present study was to num...

  • Article
  • Open Access
14 Citations
3,119 Views
19 Pages

14 August 2020

The lack of electricity access is increasingly concentrated in rural areas of developing countries, in which mini-grids are often a suitable solution; however, given the high risks, it is crucial to minimize costs. This paper aims at analyzing existi...

  • Article
  • Open Access
2 Citations
1,574 Views
14 Pages

Meshless Search SR-STAP for Airborne Radar Based on Meta-Heuristic Algorithms

  • Yunfei Hou,
  • Yingnan Zhang,
  • Wenzhu Gui,
  • Di Wang and
  • Wei Dong

27 November 2023

The sparse recovery (SR) space-time adaptive processing (STAP) method has excellent clutter suppression performance under the condition of limited observation samples. However, when the cluttering is nonlinear in a spatial-Doppler profile, it will ca...

  • Article
  • Open Access
2 Citations
643 Views
27 Pages

Performance Analysis of Multivariable Control Structures Applied to a Neutral Point Clamped Converter in PV Systems

  • Renato Santana Ribeiro Junior,
  • Eubis Pereira Machado,
  • Damásio Fernandes Júnior,
  • Tárcio André dos Santos Barros and
  • Flavio Bezerra Costa

18 August 2025

This paper addresses the challenges encountered by grid-connected photovoltaic (PV) systems, including the stochastic behavior of the system, harmonic distortion, and variations in grid impedance. To this end, an in-depth technical and pedagogical an...

  • Article
  • Open Access
5 Citations
2,579 Views
23 Pages

There has been a concern that the accurate numerical simulation of multi-body flow, which is caused by the multiple disintegrations of expired spacecraft re-entering into the near space, has a critical bottleneck impact on the falling area of the dis...

  • Article
  • Open Access
10 Citations
5,079 Views
13 Pages

Transmission Lines in Poland and Space Weather Effects

  • Agnieszka Gil,
  • Renata Modzelewska,
  • Szczepan Moskwa,
  • Agnieszka Siluszyk,
  • Marek Siluszyk,
  • Anna Wawrzynczak,
  • Mariusz Pozoga and
  • Sebastian Domijanski

9 May 2020

We analyze the solar influence of space weather events on Polish energy infrastructure via geomagnetic disturbances. We consider two time intervals of very different levels of solar activity (SA) in the course of the solar activity cycle 24: 2010&mda...

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