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Your search keyword '"Ji, Yancheng"' showing total 110 results
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110 results on '"Ji, Yancheng"'

1. 5G Technologies Based Remote E-Health: Architecture, Applications, and Solutions

Author

Duan, Wei, Ji, Yancheng, Zhang, Yan, Zhang, Guoan, Frascolla, Valerio, and Li, Xin

Subjects
Computer Science - Networking and Internet Architecture, Computer Science - Computers and Society
Abstract

Currently, many countries are facing the problems of aging population, serious imbalance of medical resources supply and demand, as well as uneven geographical distribution, resulting in a huge demand for remote e-health. Particularly, with invasions of COVID-19, the health of people and even social stability have been challenged unprecedentedly. To contribute to these urgent problems, this article proposes a general architecture of the remote e-health, where the city hospital provides the technical supports and services for remote hospitals. Meanwhile, 5G technologies supported telemedicine is introduced to satisfy the high-speed transmission of massive multimedia medical data, and further realize the sharing of medical resources. Moreover, to turn passivity into initiative to prevent COVID-19, a broad area epidemic prevention and control scheme is also investigated, especially for the remote areas. We discuss their principles and key features, and foresee the challenges, opportunities, and future research trends. Finally, a node value and content popularity based caching strategy is introduced to provide a preliminary solution of the massive data storage and low-latency transmission., Comment: 16 pages, 4 figures

Published
2020

3. Capacity Enhanced Cooperative D2D Systems over Rayleigh Fading Channels with NOMA

Author

Duan, Wei, Ju, Jinjuan, Sun, Qiang, Ji, Yancheng, Wang, Zhiliang, Choi, Jeaho, and Zhang, Guoan

Subjects
Computer Science - Information Theory
Abstract

This paper considers the cooperative device-to-device (D2D) systems with non-orthogonal multiple access (NOMA). We assume that the base station (BS) can communicate simultaneously with all users to satisfy the full information transmission. In order to characterize the impact of the weak channel and different decoding schemes, two kinds of decoding strategies are proposed: \emph{single signal decoding scheme} and \emph{MRC decoding scheme}, respectively. For the \emph{single signal decoding scheme}, the users immediately decode the received signals after receptions from the BS. Meanwhile, for the \emph{MRC decoding scheme}, instead of decoding, the users will keep the receptions in reserve until the corresponding phase comes and the users jointly decode the received signals by employing maximum ratio combining (MRC). Considering Rayleigh fading channels, the ergodic sum-rate (SR), outage probability and outage capacity of the proposed D2D-NOMA system are analyzed. Moreover, approximate expressions for the ergodic SR are also provided with a negligible performance loss. Numerical results demonstrate that the ergodic SR and outage probability of the proposed D2D-NOMA scheme overwhelm that of the conventional NOMA schemes. Furthermore, it is also revealed that the system performance including the ergodic SR and outage probability are limited by the poor channel condition for both the \emph{single signal decoding scheme} and conventional NOMA schemes., Comment: 24pages, 8figures

Published
2018

7. Literature research on medicinal parts and processing similarities and differences of Terminalia chebula in Suhexiang Pill.

Author

LI Yi, ZHAO Wenzhou, JI Yancheng, and ZHANG Ji

Subjects
TERMINALIA chebula, TRADITIONAL medicine, CLINICAL pharmacology, SOCIAL factors, CLINICAL medicine
Abstract

As a foreign medicine, Terminalia chebula is an important part of the Suhexiang Pill. However, the medicinal parts of Terminalia chebula in the Suhexiang Pill recorded in different prescription books are disparate. Combining historical and social factors, this article refers to and sorts ancient books and documents, classics of ethnic medicine, and Dunhuang manuscripts to determine whether the peel and pulp of Terminalia chebula in Suhexiang Pill mentioned in different prescription books should be the same part. Ethnic medicine is very familiar with the understanding and clinical application of Terminalia chebula. With the progress of the times and an in-depth understanding of Terminalia chebula by various ancient doctors and herbalists in clinical practice, its main efficacy is changing. Modern clinical pharmacology research not only confirms the pharmaceutical effects of Terminalia chebula recorded in ancient documents, but also finds new pharmaceutical actions. Meanwhile, it also explains the use of different parts of the Terminalia chebula from a pharmacological perspective. This article discusses herbal textual research, medicinal parts, and analysis of pharmaceutical effects, and similarities and differences in Terminalia chebula processing to carry out this in-depth study and provide clinical guidance for its use. [ABSTRACT FROM AUTHOR]

Published
2024
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22. Partial-NOMA Based Physical Layer Security: Forwarding Design and Secrecy Analysis

Author

Zhuo, Biting, Duan, Wei, Gu, Juping, Gu, Xiaohui, Zhang, Guoan, Ji, Yancheng, Choi, Jaeho, and Wen, Miaowen

Abstract

Due to the inherent broadcast characteristics of wireless communications, the data transmission is difficult to be shielded from unintended recipients. Secure communications over wireless channel is regarded as an effective way to overcome this issue in the design of wireless networks. In this paper, a new cooperative relaying system based on partial non-orthogonal multiple access (P-NOMA) is proposed, where two relays help the communications between the source and destination nodes in the presence of an eavesdropper (Eve). Specifically, after receiving the P-NOMA signals transmitted from the base station, the relay nodes decode and forward the receptions under the attack of a passive Eve. To improve the physical layer security (PLS) of the proposed system, we design four cooperative schemes for signals decoded at the relays and destination, where maximum ratio combination (MRC) technique is adopted to both destination and Eve to construe the worst case for achievable secrecy rate. Without lose of generality, the channel conditions (weak or strong), new power allocations, decoding principles and Eve locations are considered in designing forwarding schemes. In particular, to further improve the achievable secrecy rate, we also propose that, if the Eve locating near to the weak relay node, the weak relay only forwards the signal with lower power allocation factor at the base station. The closed-form expressions of the achievable secrecy rates are derived for the proposed schemes over Rayleigh fading and Nakagami- $m$ fading channels, which well match the simulation results. By means of the numerical result, it corroborates the superiority of the proposed P-NOMA schemes over the conventional NOMA schemes. It is also revealed that, with an increasing overlap ratio, the advantage in terms of the secrecy rate becomes more remarkable.

Published
2023
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38. Tunable Double Pulse Dissipative Solitons Yb-Doped Fiber Laser Based on Sagnac Loop

Author

耿健 Geng Jian, 朱晓军 Zhu Xiaojun, 季彦呈 Ji Yancheng, 章国安 Zhang Guoan, 徐晨 Xu Chen, 曹娟 Cao Juan, and 金丽 Jin Li

Subjects
Materials science, business.industry, Fiber laser, Doping, Dissipative system, Optoelectronics, business, Atomic and Molecular Physics, and Optics, Double pulse, Sagnac loop, Electronic, Optical and Magnetic Materials
Published
2019
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39. Bandwidth Tunable Microfiber-Assisted Mach-Zehnder Interferometer Based on Tapered-Drawing Fiber Bragg Grating

Author

朱晓军 Zhu Xiaojun, 金丽 Jin Li, 耿健 Geng Jian, 章国安 Zhang Guoan, 曹娟 Cao Juan, 徐晨 Xu Chen, and 季彦呈 Ji Yancheng

Subjects
Materials science, business.product_category, Optics, Fiber Bragg grating, business.industry, Microfiber, Bandwidth (signal processing), business, Mach–Zehnder interferometer, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2019
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43. Research on fine grained software radio communication algorithm based on GPU parallel processing technology.

Author

Ji, Yancheng, Zhang, Xiao, Zhang, Guoan, and Hu, Jingjing

Subjects
SOFTWARE radio, RADIO (Medium), COMMUNICATIONS software, DECODING algorithms, BROADBAND communication systems, PARALLEL processing, PARALLEL programming
Abstract

With the development of information technology and the progress of science and technology, broadband wireless communication is changing people's way of life. Traditional software radio communication algorithms can't meet high speed and efficient data processing requirements, and GPU parallel processing technology arises at the historic moment. Based on this, starting with GPU and CPU, the relationship between parallel and serial operation was studied. According to the characteristics of GPU with high performance, high bandwidth, high parallelism and programmable architecture, the principle of parallel Turbo algorithm in GPU is discussed. The turbo decoding algorithm is studied from both MAP and SOVA, and the total structure of the GPU decoder based on GPU and the subroutine thread distribution are proposed. And the result shows that GPU parallel processing technology based on the fine grained software radio communication algorithm, not only increases the granularity of fine-grained parallel particles, but also improves the operation speed. [ABSTRACT FROM AUTHOR]

Published
2019
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47. A near optimal power allocation scheme for cooperative relay networking with NOMA

Author

Yu, Haiyang, Duan, Wei, Zhang, Guoan, Ji, Yancheng, Zhu, Xiaojun, and Choi, Jaeho

Abstract

In this paper, we propose cooperative relay networks with non-orthogonal multiple access in order to design a near-optimal power allocation strategy. Like other next generation wireless technologies, spatially multiplexed transmissions are achieved by relay nodes which enables decode-and-forward relaying of a new superposition code after reception from the source. It is worth noting that, since it is hard to exactly prove the proposed PA scheme, due the fact that it is one kind of the approximate conjectures. Therefore, mathematical and numerical methods have been used to clarify the feasibility of the proposal. Numerical results indicate that it is able to asymptotically achieve the optimal sum rate at the higher signal-to-noise ratio region with the proposed strategy applied instead of negligible performance loss.

Published
2019

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