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Optical-terahertz-optical seamless integration system for dual-λ 400 GbE real-time transmission at 290 GHz and 340 GHz

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Science China(Information Sciences) 2023年第11期66卷 302-304页

作者： Jiao ZHANG Mingzheng LEI Min ZHU Bingchang HUA Yuancheng CAI Yucong ZOU Liang TIAN Yunwu WANG Jinbiao XIAO yongming huang Jianjun YU Xiaohu YOU Purple Mountain Laboratories National Mobile Communications Research Laboratory Southeast University School of Information Science and Technology Fudan University Peng Cheng Laboratory

Terahertz band(THz-band, 0.3 to 10 THz) communications are envisioned as a promising candidate for 6G and beyond technology, which can provide data capacity tens or even hundreds of Gbps per physical layer link [1–3]. Over the past several years, a series of THz communication systems at record-high data rates have undergone significant development, accelerated by electronic and hybrid electronicphotonic techniques [4–9].

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Research on User Pairing Techniques Based on NOMA in Cognitive Radio Networks

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Journal of Computer and Communications 2023年第3期11卷 131-145页

作者： yongming huang Xiaoli He Yuxin Du School of Computer Science and Engineering Sichuan University of Science and Engineering Zigong China

This paper outlined a Non-Orthogonal Multiple Access (NOMA) grouping transmission scheme for cognitive radio networks. To address the problems of small channel gain difference of the middle part users caused by the traditional far-near pairing algorithm, and the low transmission rate of the traditional Orthogonal Multiple Access (OMA) transmission, a joint pairing algorithm was proposed, which provided multiple pairing schemes according to the actual scene. Firstly, the secondary users were sorted according to their channel gain, and then different secondary user groups were divided, and the far-near pairing combined with (Uniform Channel Gain Difference (UCGD) algorithm was used to group the secondary users. After completing the user pairing, the power allocation problem was solved. Finally, the simulation data results showed that the proposed algorithm can effectively improve the system transmission rate.

关键词： Cognitive Radio Non-Orthogonal Multiple Access User Grouping Power Allocation

Research on Physical Layer Security in Cognitive Wireless Networks with Multiple Eavesdroppers Based on Resource Allocation Algorithm

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Journal of Computer and Communications 2023年第3期11卷 32-46页

作者： Yuxin Du Xiaoli He yongming huang School of Computer Science Sichuan University of Science and Engineering Zigong China

With the rapid development of the Internet of Things (IoT), non-Orthogonal Multiple Access (NOMA) technology and cognitive wireless network are two promising technologies to improve the spectral efficiency of the system, which have been widely concerned in the field of wireless communication. However, due to the importance of ownership and privacy protection, the IoT system must provide corresponding security mechanisms. From the perspective of improving the transmission security of CR-NOMA system based on cognitive wireless network, and considering the shortcomings of traditional relay cooperative NOMA system, this paper mainly analyzes the eavesdropping channel model of multi-user CR-NOMA system and derives the expressions of system security and rate to improve the security performance of CR-NOMA system. The basic idea of DC planning algorithm and the scheme of sub-carrier power allocation to improve the transmission security of the system were introduced. An algorithm for DC-CR-NOMA was proposed to maximize the SSR of the system and minimize the energy loss. The simulation results show that under the same complexity, the security and speed of the system can be greatly improved compared with the traditional scheme.

关键词： Cognitive Radio Networks Non-Orthogonal Multiple Access Physical Layer Security Sum of Safety Rates

Design and Implementation of a TDD-Based 128-Antenna Massive MIMO Prototype System

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China Communications 2017年第12期14卷 162-187页

作者： Xi Yang Wenjun Lu Ning Wang Karl Nieman Chao-Kai Wen Chuan Zhang Shi Jin Xiaomin Mu Ian Wong yongming huang Xiaohu You National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China Jiangsu Key Laboratory of Wireless Communications Nanjing University of Posts and Telecommunications Nanjing 210003 China School of Information Engineering Zhengzhou University Zhengzhou 450001 China National Instruments Austin 78759 Texas USA Institute of Communications Engineering National Sun Yat-sen University Kaohsiung 804 Taiwan China

Owing to the dramatic mobile IP growth,the emerging Internet of Things,and cloud-based applications,wireless networking is witnessing a paradigm *** fully exploiting spatial degrees of freedom,massive multiple-input-multiple-output(MIMO) systems promise significant gains in data rates and link *** the research community has recognized the theoretical benefits of these systems,building the hardware of such complex systems is a challenge in *** paper presents a time division duplex(TDD)-based 128-antenna massive MIMO prototype system from theory to ***,an analytical signal model is provided to facilitate the setup of a feasible massive MIMO prototype ***,a link-level simulation consistent with practical TDDbased massive MIMO systems is conducted to guide and validate the massive MIMO system *** design and implement the TDDbased 128-antenna massive MIMO prototype system with the guidelines obtained from the link-level *** real-time video transmission and downlink data transmission under the configuration of multiple single-antenna users are *** withstate-of-the-art prototypes demonstrate the advantages of the proposed system in terms of antenna number,bandwidth,latency,and *** proposed system is also equipped with scalability,which makes the system applicable to a wide range of massive scenarios.

关键词： massive MIMO prototyping sys-tem software defined radio TDD

Estimating the Effect of Carbon Tax on CO<sub>2</sub>Emissions of Coal in China

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Journal of Environmental Protection 2011年第8期2卷 1101-1107页

作者： Kezhong Zhang Juan Wang yongming huang 不详

Using the co-integration model and the VAR model, this article estimates the effect of carbon taxes on CO2 emissions of coal in 2020. The estimation for the long-run price elasticity of coal in China is –0.34, which shows more elasticity than those of previous studies. The main reason lies in the fact that none of the previous studies considered the structural breaks of Chinese energy consumption in 2006. The levy of 100RMB, 150RMB and 200RMB on per ton of standard coal from 2012 in China will decrease the consumption of coal by 4.88%, 7.31% and 9.75% respectively in 2020, which will further lead to the decrease of CO2 emissions in 2020 by 8.69%, 13.02% and 17.36% respectively. This observation implies that the use of carbon tax scheme is one of the most practical policies that can mitigate the challenge of climate change. However, the implementation measures should be deliberately designed in such a way that making heavy impact on economic development of China is avoided.

关键词： Carbon Tax CO2 Emissions Coal Consumption

针刺治疗全膝关节置换术后手术切口周围皮肤麻木临床研究

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新中医 2024年第16期56卷 95-100页

作者：高明龚建文肖俊强陈博鉴梁超伦黄永明刘文渤广州中医药大学广东广州510405 广州中医药大学第二附属医院/广东省中医院广东广州510120 深圳市平乐骨伤科医院广东深圳518010

目的:观察针刺治疗全膝关节置换术(TKA)术后手术切口周围皮肤麻木的临床疗效。方法:选取70例TKA术后2周首次复诊时出现手术切口周围皮肤麻木的患者,采用随机数字表法分为对照组和针刺组各35例(70膝)。研究期间,2组各剔除3例,最终纳入研... 详细信息

目的:观察针刺治疗全膝关节置换术(TKA)术后手术切口周围皮肤麻木的临床疗效。方法:选取70例TKA术后2周首次复诊时出现手术切口周围皮肤麻木的患者,采用随机数字表法分为对照组和针刺组各35例(70膝)。研究期间,2组各剔除3例,最终纳入研究各32例(64膝)。对照组采用甲钴胺片治疗,针刺组在甲钴胺片基础上给予针刺治疗。比较2组皮肤麻木面积、膝关节活动度(ROM)、纽约特种外科医院(HSS)膝关节评分及满意度评分。结果:组别与时间的交互作用对皮肤麻木面积的影响有统计学意义(P0.05)。时间因素对2组皮肤麻木面积、膝关节ROM及HSS膝关节评分的单独效应均有统计学意义(P0.05)。随访6个月,针刺组满意度评分高于对照组,差异有统计学意义(P<0.05)。结论:针刺可缓解TKA术后患者手术切口周围皮肤麻木,提高其满意度,但无法促进膝关节功能恢复。

关键词：全膝关节置换术后手术切口周围皮肤麻木针刺满意度膝关节功能

Multi-User MmWave Beam Tracking via Multi-Agent Deep Q-Learning

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ZTE Communications 2023年第2期21卷 53-60页

作者： MENG Fan huang yongming LU Zhaohua XIAO Huahua Purple Mountain Laboratories Nanjing 211111China School of Information Science and Engineering Southeast UniversityNanjing 210096China State Key Laboratory of Mobile Network and Mobile Multimedia Technology ZTE CorporationShenzhen 518057China

Beamforming is significant for millimeter wave multi-user massive multi-input multi-output *** the meanwhile,the overhead cost of channel state information and beam training is considerable,especially in dynamic *** reduce the overhead cost,we propose a multi-user beam tracking algorithm using a distributed deep Q-learning *** online learning of users’moving trajectories,the proposed algorithm learns to scan a beam subspace to maximize the average effective sum *** practical implementation,we model the continuous beam tracking problem as a non-Markov decision process and thus develop a simplified training scheme of deep Q-learning to reduce the training ***,we propose a scalable state-action-reward design for scenarios with different users and antenna *** results verify the effectiveness of the designed method.

关键词： multi-agent deep Q-learning centralized training and distributed execution mmWave communication beam tracking scalability

THE ANALYSIS OF CELL LOSS RATES IN AN ATM MUX WITH LOSS PRIORITIES

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Journal of Electronics(China) 1998年第1期15卷 16-21页

作者： Wang yongming huang Zailu(Huazhong University of Science and Technology, Wuhan 430074)

The analysis of cell loss rates in an ATM Mux with loss priorities is an important problem in the-study of traffic control in ATM networks. In this paper, the loss rates of the cells with different priorities in an ATM Mux are analyzed by approximating the actual input process with two-state MMDP and fluid flow technique, and the analytical expressions of the relation between the loss rates and the buffer size are obtained. Simulation shows that the approach is sulliciently accurate for applications.

关键词： Loss priority mechanism Cell loss rate Asynchronous transfer mode

Adaptive Wavelet Packet Filter-Bank Based Acoustic Feature for Speech Emotion Recognition

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Adaptive Wavelet Packet Filter-Bank Based Acoustic Feature f...