Pengfei Liu

ORCID: 0000-0003-4863-016X
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About
Contact & Profiles
Research Areas
  • Smart Grid Security and Resilience
  • Power Systems and Technologies
  • Nuclear Materials and Properties
  • Smart Grid and Power Systems
  • Internet Traffic Analysis and Secure E-voting
  • Advanced Fiber Optic Sensors
  • Photonic and Optical Devices
  • Security and Verification in Computing
  • Advanced Malware Detection Techniques
  • Scientific Computing and Data Management
  • Fluid Dynamics and Vibration Analysis
  • Wind Energy Research and Development
  • Vehicle Dynamics and Control Systems
  • Wave and Wind Energy Systems
  • Grouting, Rheology, and Soil Mechanics
  • Aerospace Engineering and Control Systems
  • Particle Dynamics in Fluid Flows
  • Electricity Theft Detection Techniques
  • Granular flow and fluidized beds
  • Network Security and Intrusion Detection
  • Cyclone Separators and Fluid Dynamics
  • Magnetic confinement fusion research
  • Advanced Battery Materials and Technologies
  • Robotic Path Planning Algorithms
  • Topic Modeling

Tiandi Science & Technology (China)
2023

Carnegie Mellon University
2022

Newcastle University
2022

Inspire
2022

Xi'an Jiaotong University
2017-2021

Purdue University West Lafayette
2020

Zhejiang Sci-Tech University
2020

Shenyang Aerospace University
2019

China Electronics Technology Group Corporation
2013

Changchun University of Science and Technology
2011

Charge heterogeneity is a prevalent feature in many electrochemical systems. In commercial cathode of Li-ion batteries, the composite hierarchically structured across multiple length scales including sub-micron single-crystal primary-particle domains up to macroscopic particle ensembles. The redox kinetics charge transfer and mass transport strongly couples with mechanical stresses. This interplay catalyzes substantial (re)distribution, stresses, damage electrode during charging discharging....

10.1149/1945-7111/ab78fa article EN cc-by Journal of The Electrochemical Society 2020-01-03

With the development of demand response technologies, pricing scheme in smart grids is moving from flat to multiple (MP), which facilitates energy saving at consumer side. However, flexible policy may be exploited for stealthy reduction utility bills. In this paper, we present a hidden electricity theft (HET) attack by exploiting emerging MP scheme. The basic idea that attackers can tamper with meters cheat some consumed under lower price. To construct HET attack, propose an optimization...

10.1109/tifs.2020.2965276 article EN IEEE Transactions on Information Forensics and Security 2020-01-01

10.1016/j.applthermaleng.2017.05.184 article EN Applied Thermal Engineering 2017-05-31

A state estimation-based dynamic encryption and authentication (SEDEA) approach is proposed to protect the communication between control center (CC) remote terminal units (RTUs) in smart grid, including measurements reported from RTUs commands sent CC. The of power systems are selected generate keys, which measured on RTUs, estimated CC using estimation. With changes system, each RTU updates its key regularly, estimates new keys all dynamically synchronously. pairs applied ensure...

10.1109/access.2017.2713440 article EN cc-by-nc-nd IEEE Access 2017-01-01

Yang Xiao, Jinlan Fu, Weizhe Yuan, Vijay Viswanathan, Zhoumianze Liu, Yixin Graham Neubig, Pengfei Liu. Proceedings of the 60th Annual Meeting Association for Computational Linguistics: System Demonstrations. 2022.

10.18653/v1/2022.acl-demo.18 article EN cc-by 2022-01-01

Abstract It has been challenging to design seedling pick-up mechanism based on given key points and trajectories, because it involves dimensional synthesis rod length optimization. In this paper, the of with planetary gear train was studied data trajectory endpoint mechanism. Given positions orientations requirements five points, study first conducted a linkage size center rotation. The next steps were select reasonable solution optimize values ideal trajectory. link motion driven by...

10.1186/s10033-020-00484-w article EN cc-by Chinese Journal of Mechanical Engineering 2020-09-10

It is difficult to prevent attackers from intruding into the industrial control system(ICS) physically, who can connect external devices system steal information or inject false data. In this paper, a physical intrusion detection method proposed for ICS, by analyzing communication signal at layer. RS485, one of most important and widely-used serial bus, selected investigate how intruded influence voltage in ICS network. The model RS485 lines built represent difference caused variation detect...

10.1109/cns.2018.8433194 article EN 2018-05-01

The firmware vulnerability is one of the most serious threats for Internet-of-Things (IoT) security. However, it hard to investigate firmware, due lack source code and complicated structure. In this paper, a searchbased analysis method proposed associate program functionalities with assembly code. experiment, Siemens PAC4200 power meter selected demonstrate how search device information interface. Moreover, interface shown, which would be exploited manipulate data device.

10.1109/cns.2018.8433163 article EN 2018-05-01

Compared to conventional piezoelectric sensors, fiber Bragg grating (FBG) sensors have many advantages. This paper reviews the development of FBG pressure sensor. The features and application scopes several types are discussed. We designed a sensor based on thin-walled cylinder. relationship between central wavelength is derived. experimental sensitivity 0.079nm/MPa, linearity 0.999. Through discussion properties, compression sensitizing techniques proposed.

10.1109/aismot.2011.6159361 article EN 2011-10-01

The rapid growth of scientific literature imposes significant challenges for researchers endeavoring to stay updated with the latest advancements in their fields and delve into new areas. We introduce OpenResearcher, an innovative platform that leverages Artificial Intelligence (AI) techniques accelerate research process by answering diverse questions from researchers. OpenResearcher is built based on Retrieval-Augmented Generation (RAG) integrate Large Language Models (LLMs) up-to-date,...

10.48550/arxiv.2408.06941 preprint EN arXiv (Cornell University) 2024-08-13

This paper proposes a distribution grid network planning model based on improved particle swarm optimization algorithm with planned interruption non-effect load fluctuation uncertainty, and studies the reconstruction fault isolation recovery. Through simulation, it is found that enhances diversity, accelerates convergence, has good global search ability. It feasible effective, positive significance for promoting application of PSO in power systems.

10.1088/1755-1315/252/3/032071 article EN IOP Conference Series Earth and Environmental Science 2019-07-09

A quasi-distributed sensor system based on optical frequency domain reflectometry where the sensing points were identical, low-reflective fiber gratings in a single was investigated. Firstly, spatial distribution function of deduced theory, and effects interference among each grating between with broadband reflector Then strain cascaded 215 fibers Bragg (FBGs) had been numerical investigated, addressing wavelength demodulation implemented according to Fourier transform inverse transform....

10.1117/12.2030825 article EN Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE 2013-08-29

Global gyrokinetic simulations find a strong helically-trapped electron mode (HTEM) driven by density gradients in the optimized stellarator W7-X fusion experiment. The eigenmode structure localizes inner side of torus with an unfavorable magnetic curvature and weak field, where there is large fraction electrons. excited mostly ion free energy propagates direction linear frequency much smaller than diamagnetic frequency. instability saturates nonlinear processes turbulence spreading real...

10.48550/arxiv.2310.06988 preprint EN cc-by-nc-sa arXiv (Cornell University) 2023-01-01

This paper studies the distribution network framework construction technology of load characteristics. A forecasting model is proposed considering source-load-storage synergistic interaction effect, and a mathematical elastic power established. method stochastic uncertainty in loads based on scenario reduction proposed. An optimal design for target grid comprehensive operating costs carbon emission constructed. After verification optimization, multi-load access capacity structure effectively...

10.1109/iceace60673.2023.10442586 article EN 2023-12-29

The emphasis of this paper is to propose a method based on Legendre pseudo spectral solve the optimal landing path planning problem for navigable aircraft. By establishing mathematical model aircraft, aircraft decomposed into transverse and longitudinal dynamic equations, flight restriction set motion law characteristics in combination with actual situation. using pseudo-spectral method, OCP transformed NLP through global interpolation polynomial discrete state variables control variables,...

10.1109/ccdc.2019.8832895 article EN 2019-06-01
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