Search

Your search keyword '"Wang, Ruijun"' showing total 730 results
Start Over Author "Wang, Ruijun"
730 results on '"Wang, Ruijun"'

101. High-Order Rotational-Migration Correction and ISAR Imaging in the THz Band Considering Impact of Scattering Intensity

Author

Tang, Bin, Wang, Hongqiang, Yang, Qi, Wang, Ruijun, Yuan, Zhian, Yi, Jun, and Deng, Bin

Abstract

The high-resolution inverse synthetic aperture radar (ISAR) imaging of space target holds tremendous significance for recognition and on-orbit maintenance. The terahertz (THz) radar possesses natural superiority in terms of large bandwidth and short wavelength, enabling it to achieve higher resolution both in range and azimuth directions. However, the range cell migration (RCM) induced by rotation is severe in the THz band, even in small rotation angle. In order to achieve high-accuracy RCM correction, an imaging algorithm based on keystone transform (KT) and fast Gaussian gridding nonuniform fast Fourier transform (FGG NUFFT) is presented in this article. Nevertheless, to correct the second-order RCM and compensate the spatial-variant (SV) phase error, the rotation parameters of uncooperative target need to be estimated first. Moreover, by analyzing the ISAR images of space targets, it is found that the scattering intensity of certain components on the satellite body, such as the cavity structure of the antenna, is stronger than that of the solar panels. Considering scattering intensity of these components, the traditional estimation method under global image quality criteria may fail. To prevent getting trapped in a local optimum or finding an incorrect solution due to the influence of strong scattering points, a parameter estimation framework based on prior knowledge added sparrow search algorithm (PKSSA) under local maximum contrast criterion (LMCC) is brought forward. The proposed novel algorithm can not only fast estimate rotation parameters without being affected by strong scattering points but also obtain fine imaging results. Numerous electromagnetic simulation and real measured THz experiment results prove the correctness and effectiveness of the proposed algorithm.

Published
2024
Full Text
View/download PDF

102. Cooperative Game Theoretic Power Allocation Method to Distributed MIMO Radar Sensor Network for Multitarget Detection in Low-Altitude

Author

Qi, Cheng, Zhang, Haowei, Xie, Junwei, Liu, Weijian, and Wang, Ruijun

Abstract

To enhance air defense efficiency in a distributed multiple input multiple output (D-MIMO) radar sensor network (RSN) for detecting low-altitude targets, this article introduces a cooperative game theoretic power allocation (CGTPA) strategy within power budget constraints. The CGTPA mechanism involves precise power management to effectively mitigate variations and fading in the received signal caused by multipath effects. Thereby, it can capitalize on the abundant scattering characteristics within a multipath environment to achieve enhanced target detectability. The article introduces the concept of multipath distance difference (MDD) by incorporating errors from space-based external information, and subsequently derives the Neyman–Pearson based detection probability and signal-to-interference-plus-noise ratio (SINR). Further, SINR is utilized as the metric for RSN target detection performance, and an optimization model is established based on the max–min criterion. Considering the non-convex characteristic of the optimization model, cooperative game theory provides a vivid and flexible framework for collaborative detection among intelligent antennas in the RSN. The existence and uniqueness of the core are analyzed and reasoned. Furthermore, the Shapley values, derived based on the fairness principle, are utilized to address the cooperative game power allocation problem. Weighted graph techniques are employed to simplify computational complexity, resulting in a power allocation scheme that adheres to Pareto optimality and fairness principles. Numerical results validate our theoretical analysis and the effective performance of the proposed algorithm, which approaches optimal RA method with significant instantaneity.

Published
2024
Full Text
View/download PDF

104. Study on the Adhesion Characteristics of Asphalt-Aggregate Interface in Cold Recycled Asphalt Mixtures.

Author

Li, Qiang, Wang, Jiaqing, Song, Shijie, Wang, Ruijun, Jiang, Jiwang, and Yan, Chaojie

Subjects
ASPHALT, ASPHALT pavement recycling, CRUMB rubber, INTERFACIAL roughness, NUCLEAR forces (Physics), MIXTURES, CEMENT mixing
Abstract

The reclaimed asphalt pavement materials have been used for sustainable cold-recycling, significantly benefiting air quality and resource conservation, while its microscale interface properties greatly affected road performance during the cold-recycling processes. In this investigation, the cold recycled asphalt mixtures were prepared with different mixing proportions, considering the effects of cement content and mixing water amount. The adhesion characteristics of the asphalt-aggregate interface in different cold recycled asphalt mixtures have been comprehensively investigated based on the atomic force microscopic (AFM). The microscale morphology and the adhesion properties, including roughness, inclination angle, adhesion force, Derjaguin–Muller–Toporov (DMT) modulus, and dissipated energy were evaluated at the interface and noninterface regions. The micromorphology results showed that the addition of cement could enhance the roughness and inclination in interface regions. In addition, the content of mixed water showed the most significant effect when the water amount was 80%. The results showed that the adhesion force, DMT modulus, and dissipated energy increased with the addition of cement, indicating that the cement could improve the microscale mechanical properties of cold recycled asphalt mixtures. With the increase of mixing water content, the adhesion characteristics showed varied results, and the optimum water content of 80% contributed to the adhesive properties. In addition, the adhesion force, DMT modulus, and dissipated energy were all higher in the interface region by comparing with the noninterface region. The correlations between the macroscale splitting tensile strength and microscale adhesion characteristics of cold recycled asphalt mixtures were established. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

119. Identification of body size characteristic points based on the Mask R-CNN and correlation with body weight in Ujumqin sheep

Author

Qin, Qing, primary, Dai, Dongliang, additional, Zhang, Chongyan, additional, Zhao, Cun, additional, Liu, Zhichen, additional, Xu, Xiaolong, additional, Lan, Mingxi, additional, Wang, Zhixin, additional, Zhang, Yanjun, additional, Su, Rui, additional, Wang, Ruijun, additional, Wang, Zhiying, additional, Zhao, Yanhong, additional, Li, Jinquan, additional, and Liu, Zhihong, additional

Published
2022
Full Text
View/download PDF

121. Evaluation of lipidomic change in goat sperm after cryopreservation

Author

Xu, Bingbing, primary, Wang, Ruijun, additional, Wang, Zhiying, additional, Liu, Hongfu, additional, Wang, Zhen, additional, Zhang, Weihang, additional, Zhang, Yanjun, additional, Su, Rui, additional, Liu, Zhihong, additional, Liu, Yongbin, additional, Li, Jinquan, additional, and Zhang, Jiaxin, additional

Published
2022
Full Text
View/download PDF

122. Identification of key pathways and genes that regulate cashmere development in cashmere goats mediated by exogenous melatonin

Author

Liu, Zhihong, primary, Liu, Zhichen, additional, Mu, Qing, additional, Zhao, Meng, additional, Cai, Ting, additional, Xie, Yuchun, additional, Zhao, Cun, additional, Qin, Qing, additional, Zhang, Chongyan, additional, Xu, Xiaolong, additional, Lan, Mingxi, additional, Zhang, Yanjun, additional, Su, Rui, additional, Wang, Zhiying, additional, Wang, Ruijun, additional, Wang, Zhixin, additional, Li, Jinquan, additional, and Zhao, Yanhong, additional

Published
2022
Full Text
View/download PDF

125. Expression profile of long non-coding RNA in inner Mongolian cashmere goat with putative roles in hair follicles development

Author

Ma, Rong, primary, Shang, Fangzheng, additional, Rong, Youjun, additional, Pan, Jianfeng, additional, Wang, Min, additional, Niu, Shuran, additional, Qi, Yunpeng, additional, Li, Yanbo, additional, Lv, Qi, additional, Wang, Zhiying, additional, Wang, Ruijun, additional, Su, Rui, additional, Liu, Zhihong, additional, Zhao, Yanhong, additional, Wang, Zhixin, additional, Li, Jinquan, additional, and Zhang, Yanjun, additional

Published
2022
Full Text
View/download PDF

133. Construction and functional analysis of ceRNA regulatory network related to the development of secondary hair follicles in Inner Mongolia cashmere goats

Author

Shang, Fangzheng, primary, Ma, Rong, additional, Rong, Youjun, additional, Pan, Jianfeng, additional, Wang, Min, additional, Niu, Shuran, additional, Qi, Yunpeng, additional, Li, Yanbo, additional, Wang, Zhiying, additional, Lv, Qi, additional, Wang, Ruijun, additional, Su, Rui, additional, Liu, Zhihong, additional, Zhao, Yanhong, additional, Wang, Zhixin, additional, Li, Jinquan, additional, and Zhang, Yanjun, additional

Published
2022
Full Text
View/download PDF

137. Identification of Genes Related to Hair Follicle Cycle Development in Inner Mongolia Cashmere Goat by WGCNA

Author

Gong, Gao, primary, Fan, Yixing, additional, Yan, Xiaochun, additional, Li, Wenze, additional, Yan, Xiaomin, additional, Liu, Hongfu, additional, Zhang, Ludan, additional, Su, Yixing, additional, Zhang, Jiaxin, additional, Jiang, Wei, additional, Liu, Zhihong, additional, Wang, Zhiying, additional, Wang, Ruijun, additional, Zhang, Yanjun, additional, Lv, Qi, additional, Li, Jinquan, additional, and Su, Rui, additional

Published
2022
Full Text
View/download PDF

139. Identification of the Key Genes Associated with Different Hair Types in the Inner Mongolia Cashmere Goat

Author

Gong, Gao, primary, Fan, Yixing, additional, Li, Wenze, additional, Yan, Xiaochun, additional, Yan, Xiaomin, additional, Zhang, Ludan, additional, Wang, Na, additional, Chen, Oljibilig, additional, Zhang, Yanjun, additional, Wang, Ruijun, additional, Liu, Zhihong, additional, Jiang, Wei, additional, Li, Jinquan, additional, Wang, Zhiying, additional, Lv, Qi, additional, and Su, Rui, additional

Published
2022
Full Text
View/download PDF

141. An Approach to Evaluate Communication Cost in Grid System

Author

Wang, DaDong, Wang, HongJun, Wang, RuiJun, Liang, HaiYing, Gao, Yuan, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Jin, Hai, editor, Pan, Yi, editor, Xiao, Nong, editor, and Sun, Jianhua, editor

Published
2004
Full Text
View/download PDF

142. Convergence model of "cloud + VR" technology on account of mobile Internet of Things and exhibition industry.

Author

Wang, Ruijun

Subjects
*ONLINE exhibitions, *WIRELESS Internet, *INTERNET of things, *INDUSTRIALIZATION, *RATE of return, *AUTOMOBILE exhibitions
Abstract

The convention and exhibition industry is called "smoke‐free industry" and "new economic industry" because of its high efficiency, high rate of return, and no pollution. The article selects the industry driving effect of the convention and exhibition industry in H city as the research object, and selects the added value of the convention and exhibition industry in H city as the dependent variable. According to the relevant theories of industrial development and the current development of the exhibition industry in City H, the statistical data collected at different time points using time series data is used to construct a regression model to test the stationarity of the residual series. The results show that under the 10% significant level given in the tourism industry, the retail industry and the hotel industry, the concomitant probability is less than 0.1, and the convention and exhibition industry increases by 1% every time. It will drive the tourism industry to increase by 0.98%, the retail industry to increase by 1.87%, and the hotel industry to increase by 1.43%. There is a long‐term co‐integration relationship between the exhibition industry and it. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

147. Activating cryptic biosynthetic gene cluster through a CRISPR–Cas12a-mediated direct cloning approach

Author

Liang, Mindong, primary, Liu, Leshi, additional, Xu, Fei, additional, Zeng, Xiaoqian, additional, Wang, Ruijun, additional, Yang, Jinling, additional, Wang, Weishan, additional, Karthik, Loganathan, additional, Liu, Jiakun, additional, Yang, Zhiheng, additional, Zhu, Guoliang, additional, Wang, Shuliu, additional, Bai, Linquan, additional, Tong, Yaojun, additional, Liu, Xueting, additional, Wu, Min, additional, Zhang, Li-Xin, additional, and Tan, Gao-Yi, additional

Published
2022
Full Text
View/download PDF

148. Accuracy of Genomic Selection for Important Economic Traits of Cashmere and Meat Goats Assessed by Simulation Study

Author

Yan, Xiaochun, primary, Zhang, Tao, additional, Liu, Lichun, additional, Yu, Yongsheng, additional, Yang, Guang, additional, Han, Yaqian, additional, Gong, Gao, additional, Wang, Fenghong, additional, Zhang, Lei, additional, Liu, Hongfu, additional, Li, Wenze, additional, Yan, Xiaomin, additional, Mao, Haoyu, additional, Li, Yaming, additional, Du, Chen, additional, Li, Jinquan, additional, Zhang, Yanjun, additional, Wang, Ruijun, additional, Lv, Qi, additional, Wang, Zhixin, additional, Zhang, Jiaxin, additional, Liu, Zhihong, additional, Wang, Zhiying, additional, and Su, Rui, additional

Published
2022
Full Text
View/download PDF

149. Ball End Mill—Tool Radius Compensation of Complex NURBS Surfaces for 3-Axis CNC Milling Machines

Author

Zhao-Qin Wang, Tiesong Lin, Manyu Bao, Yu-Sen Wang, Peng He, Wang Ruijun, and Xiao-Rong Wang

Subjects
0209 industrial biotechnology, Computer science, Mechanical Engineering, Cutter location, Mechanical engineering, 02 engineering and technology, Industrial and Manufacturing Engineering, 020303 mechanical engineering & transports, 020901 industrial engineering & automation, 0203 mechanical engineering, Cnc milling, End mill, Ball (bearing), Electrical and Electronic Engineering, Normal
Abstract

In order to extend the 2D-TRC (tool radius compensation) function of 3-axis CNC milling machines to ball end mills (BEMs), a new TRC named BEM-TRC is proposed to achieve successful milling of complex surfaces without over-cut. The implementation of the BEM-TRC for complex surfaces depicted in NURBS model is divided into three steps. The first one is to search the cutting point (CP) on a NURBS surface using equi-arc length interpolation in u or v direction. The second one is to accomplish BEM-TRC at the CP through offsetting the CP to the cutter center point (CCP) of a BEM along the normal vector at CP. The third one is to compute the cutter location point (CLP) of the BEM according to the BEM-CCP. The simulation and experiment verifies that the BEM-TRC is feasible and effective, and can avoid over-cut phenomenon successfully. The BEM-TRC extends the ability of the traditional 2D-TRC function, and makes 3-axis CNC milling machines to accomplish the milling process of complex NURBS surfaces.

Published
2020

Catalog

Books, media, physical & digital resources
See catalog results