Changcheng Huang

Impact of Atmospheric Turbulence on Lidar

Xian Liu, Changcheng Huang

In the autonomous driving technology, road safety is closely related to the reliability of collision avoidance module. As a representative opto-electronic module, lidar can be integrated to the autonomous driving system to promote lidar- aided driving. Therefore, it is imperative to investigate …

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Machine Learning for Polar Codes in Small IoT Devices

Xian Liu, Changcheng Huang

Error-correction in the communication module of IoT systems is a mission-critical task. The Polar code is one of the modern 5G wireless technologies. Most conventional decoding methods are iterative. It is interesting to investigate the feasibility of AI methodology, such as machine …

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Downlink Retainability of LEO Satellite to Internet of Remote Things

Xian Liu, Changcheng Huang

Some ground devices in Internet of remote things are expected to directly access to low Earth orbit satellites. In this paper, we evaluate the communication retainability for a generic IoRT cluster that consists of one branch from the satellite and the other …

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Numerical simulation study on performance optimization of desuperheater

Huizhen Liang, Binjie Zhao, Changcheng Huang, Hao Song et autres

In order to make the superheated steam flowing at high speed complete the desuperheating process in the pipeline with limited distance, so as to save the production cost, this paper makes structural innovation on the existing equipment, a solution to install static …

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Numerical simulation and performance evaluation of cyclone separator with built‐in material for sand removal in gas well

Huizhen Liang, Changcheng Huang, Binjie Zhao, Hao Song et autres

Abstract The natural gas produced from gas wells contains a lot of fine gravel impurities, which causes the blockage of precision pressure regulating equipment and metering equipment. Cyclone separator is widely used in the field of natural gas surface sand removal because …

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Gas–liquid two‐phase flow characteristics of the jet vortex drainage gas production tool based on computational fluid dynamics

Huizhen Liang, Wei Miao, Changcheng Huang, Binjie Zhao et autres

Abstract This study is aimed at the problems of traditional vortex tools in gas wells, including notable pressure losses and short effective distances. An organic combination of jet vortex drainage and gas production tools was designed and installed without additional power equipment. …

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Effective slip length of confined fluid with wavy fluid-solid interfaces

Li Wan, Yunmi Huang, Changcheng Huang, Rong An

We have studied the effective slip length of confined fluid with nano-structured fluid-solid interfaces. A formula bridging the effective slip length and nano structures of the interfaces has been obtained analytically. For the application of the formula, a confined fluid with wavy …

Network assisted auctioning for cognitive radios

Long Jia, Changcheng Huang, James Yan

In this paper, the use of a centralized server to assist cognitive radio users in accessing bands in licensed spectrums is proposed. Typical cognitive radios are opportunistic users of spectrum bands. Therefore, they must scan the spectrum to detect existing users in …

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Self-tuning PI TCP flow controller for AQM routers with interval gain and phase margin assignment

Yang Hong, Ou Yang, Changcheng Huang

We propose a self-tuning proportional-integral (PI) controller for active queue management (AQM) in the Internet. Classical control theory is applied in the controller design. We assign a proper interval of gain and phase margins to achieve good AQM performance while adapting the …

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Effective bandwidths under dynamic weighted round robin scheduling

Hou‐Jin Li, Changcheng Huang, Michael Devetsikiotis, Gerard Damm

We develop a framework of using effective bandwidths under dynamic weighted round robin scheduling to study the statistical quality of service assurance issue in self-sizing networks supporting Differentiated Service. A traffic measurement-based adaptive effective bandwidth allocation algorithm aiming at improving the performance …

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Adaptive sampling methods for network performance metrics measurement and evaluation in MPLS-based IP networks

Wenhong Ma, Jie Yan, Changcheng Huang

In this paper, we propose, develop and evaluate a new adaptive sampling scheme for monitoring and measuring network performance metrics in MPLS-based IP networks supporting real time applications. The paper is focused on investigating the mechanisms that can adaptively adjust the parameters …

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Access delay performance of resilient packet ring under bursty periodic class B traffic load

Yan F. Robichaud, Changcheng Huang, Jinmei Yang, H. Benjamin Peng

The IEEE P802.17 workgroup is currently standardizing a ring network architecture and associated protocol called Resilient Packet Ring (RPR). In addition to high-priority guaranteed class A traffic and best-effort class C traffic, RPR supports low-jitter, delay bounded, medium priority class B traffic. …

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