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118 results on '"Chen, Wantong"'

1. B-Spline Fusion Line of Sight Algorithm for UAV Path Planning

Author

Chen, Wantong, Yang, Qianqian, Diao, Tianru, Ren, Shiyu, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Yan, Liang, editor, and Deng, Yimin, editor

Published
2023
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2. Research and Analysis of Mutual Interference Between Beidou and 5G Signals on Airport Ground

Author

Chen, Wantong, Tian, Yuyin, Diao, Tianru, Ren, Shiyu, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Yan, Liang, editor, and Deng, Yimin, editor

Published
2023
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3. Aircraft Avoidance of Suborbital Debris Hazard Zone Based on Lazy Theta* Algorithm

Author

Chen, Wantong, Diao, Tianru, Yang, Qianqian, Ren, Shiyu, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Yan, Liang, editor, and Deng, Yimin, editor

Published
2023
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4. Single-Point Positioning with Altitude Constrains: A Hard Constrain and a Weighted Constrain

Author

Ren, Shiyu, Yang, Xiangyuan, Diao, Tianru, Tian, Yuyin, Chen, Wantong, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Yan, Liang, editor, and Deng, Yimin, editor

Published
2023
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5. Wind Vector Inversion of ADS-B Data Based on Improved PSO-PF Algorithm

Author

Chen, Wantong, Wu, Duo, Ren, Shiyu, Diao, Tianru, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, Yan, Liang, editor, and Deng, Yimin, editor

Published
2023
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10. Wind Field Reconstruction Method Using Incomplete Wind Data Based on Vision Mamba Decoder Network.

Author

Chen, Min, Wang, Haonan, Chen, Wantong, and Ren, Shiyu

Subjects
AIRLINE routes, FLIGHT planning (Aeronautics), WIND speed, AERONAUTICAL safety measures, METEOROLOGY
Abstract

Accurate meteorological information is crucial for the safety of civil aviation flights. Complete wind field information is particularly helpful for planning flight routes. To address the challenge of accurately reconstructing wind fields, this paper introduces a deep learning neural network method based on the Vision Mamba Decoder. The goal of the method is to reconstruct the original complete wind field from incomplete wind data distributed along air routes. This paper proposes improvements to the Vision Mamba model to fit our mission, showing that the developed model can accurately reconstruct the complete wind field. The experimental results demonstrate a mean absolute error (MAE) of wind speed of approximately 1.83 m/s, a mean relative error (MRE) of around 7.87%, an R-square value of about 0.92, and an MAE of wind direction of 5.78 degrees. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Interference Study of 5G System on Civil Aircraft Airborne Beidou RDSS System in Takeoff and Landing Phase.

Author

Chen, Wantong, Tian, Yuyin, Sun, Shuguang, and Liu, Ruihua

Subjects
SATELLITE radio services, RADIO stations, AERONAUTICAL safety measures, 5G networks, CIVIL service
Abstract

Radio Determination Satellite Service (RDSS) is a characteristic service of BeiDou, which can provide users with short message communication services. Since the working frequency of an RDSS system is close to that of a 5G system, the RDSS system is very susceptible to interference from 5G out-of-band radiation. This paper analyzes the compatibility of 5G interference with an RDSS system from the perspective of the signal and the system. Firstly, the compatibility assessment is carried out from the perspective of the signal, the impact of interference on the capture and tracking performance of BeiDou is illustrated, and the safe coexistence distance of the two systems from the perspective of capture probability is obtained from the perspective of the signal. Subsequently, based on the link budget criterion, the interference of 5G base stations and 5G terminals to RDSS receivers under different frequency isolation and the required distance isolation for safe coexistence are analyzed from the system perspective. Finally, from the perspective of civil aviation safety, the aggregate interference is used as an evaluation index to evaluate the interference suffered by the aircraft during takeoff and landing and to obtain the interference suffered by the ground-based 5G base station during the takeoff and landing of the aircraft on different routes and in different 5G propagation environments. The simulation results show that when the airplane is closer to the ground, the ground 5G base stations will cause harmful interference to the RDSS receiver. In this study, the real flight data are combined with the simulation model to obtain the exact influence range of 5G interference on the RDSS system under different viewpoints. [ABSTRACT FROM AUTHOR]

Published
2024
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40. C-band navigation signal modulation mode and performance evaluation of BeiDou system.

Author

NI Yude, ZOU Ling, LIU Ruihua, CHEN Wantong, QIN Zhe, and WANG Kai

Subjects
CONTINUOUS phase modulation, BEIDOU satellite navigation system, RADARSAT satellites, NAVIGATION, SPHEROIDAL functions, WAVE functions, ARTIFICIAL satellites in navigation
Abstract

In view of the strict compatibility constraint requirements of C-band satellite navigation signals, continuous phase modulation based on prolate spheroidal wave functions (CPM-PSWF) is exploratorily applied to C-band navigation. After analyzing the influence of key parameters on the power spectrum characteristics of CPM-PSWF signal, four CPM-PSWF sub-families are initially screened as candidate navigation igneous for C-band, and their navigation performance indicators are also evaluated. On the basis of weighing the spectrum compatibility of the C-band signal and various navigation performance indicators, it is proposed to use the CPM-PSWF signal with "QM2PSWF (10) C=6" and h=0. 5 as the C-band navigation signal of the BeiDou system. The research shows that compared with the current C-band non-CPM-PSWF candidate navigation signal, the proposed CPM-PSWF signal spectrum leakage is less, the out-of-band attenuation is faster, and the code tracking accuracy and anti-multi-path performance are more competitive. [ABSTRACT FROM AUTHOR]

Published
2022
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41. The synergistic gelation of okra polysaccharides with kappa-carrageenan and its influence on gel rheology, texture behaviour and microstructures

Author

Lirong Jia, Feixia Duan, Qixian Tang, Yi Dong, Zhihua Xing, Li Zeng, Hong Gao, Zhang Jiaqi, Chen Wantong, Chen Jie, and Xiao Li

Subjects
Aqueous solution, Materials science, 010304 chemical physics, General Chemical Engineering, Enthalpy, Modulus, 04 agricultural and veterinary sciences, General Chemistry, Microstructure, 040401 food science, 01 natural sciences, Endothermic process, Viscoelasticity, 0404 agricultural biotechnology, Differential scanning calorimetry, Rheology, Chemical engineering, 0103 physical sciences, Food Science
Abstract

In this work, the gelling capacity of okra polysaccharides (OPs) and their interaction with the commonly used additive kappa-carrageenan in aqueous solution were studied. In rheology research, pure OPs solutions were found to always remain in liquid state, showing an elasticity performance during heating-cooling cycles. However, OPs formed stable synergistic gels with kappa-carrageenan in a wide range of pH values (5.0–9.0). OPs remarkably increased the texture parameters of the blend gels and influenced the water holding capacity (WHC) by altering the water distribution. The hardness and WHC of the OPs/kappa-carrageenan blend gels reached to the highest and lowest, respectively, at the ratios of 0.6/1.4 and 1.0/1.0. Dynamic rheology measurements and differential scanning calorimetry (DSC) revealed that the blend gels at ratios of 0.6/1.4 and 1.0/1.0 both exhibited higher sol/gel transition temperatures, gel/sol transition enthalpy (ΔH), critical gel strength (n) and fractal dimension (df) values than pure kappa-carrageenan and displayed similar trends of viscoelastic modulus (G′, G″) to those of kappa-carrageenan gel. Blend gels at the ratios of 0.6/1.4 or 1.0/1.0 also showed a sole endothermic peak in differential scanning calorimetry (DSC) spectra, representing melting temperatures at 62.3 °C and 56.1 °C, respectively. AFM observation confirmed that OPs and κ-carrageenan formed denser and irregular network structures in mixed solution, which is obviously different from the sparse meshwork formed by OPs self-assembly and could have contribute to the synergistic gelation of OPs with κ-carrageenan.

Published
2019

47. Fabrication and performance of 3D co-continuous magnesium composites reinforced with Ti2AlNx MAX phase.

Author

Chen, Wantong, Yu, Wenbo, Zhang, Pengcheng, Pi, Xufeng, Ma, Chaosheng, Ma, Guozheng, and Zhang, Lin

Abstract

Magnesium composites reinforced by N-deficient Ti2AlN MAX phase were first fabricated by non-pressure infiltration of Mg into three-dimensional (3D) co-continuous porous Ti2AlNx (x = 0.9, 1.0) preforms. The relationship between their mechanical properties and microstructure is discussed with the assessment of 2D and 3D characterization. X-ray diffraction (XRD) and scanning electron microscopy detected no impurities. The 3D reconstruction shows that the uniformly distributed pores in Ti2AlNx preforms are interconnected, which act as infiltration tunnels for the melt Mg. The compressive yield strength and microhardness of Ti2AlN0.9/Mg are 353 MPa and 1.12 GPa, respectively, which are 8.55% and 6.67% lower than those of Ti2AlN/Mg, respectively. The typical delamination and kink band occurred in Ti2AlNx under compressive and Vickers hardness (VH) tests. Owing to the continuous skeleton structure and strong interfacial bonding strength, the crack initiated in Ti2AlNx was blocked by the plastic Mg matrix. This suggests the possibility of regulating the mechanical performance of Ti2AlN/Mg composites by controlling the N vacancy and the hierarchical structure of Ti2AlN skeleton. [ABSTRACT FROM AUTHOR]

Published
2022
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