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A classical algorithm to mimic quantum decisions

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National Science Review 2019年第4期6卷 608-609页

作者： Mile gu School of Physical and Mathematical Sciences Nanyang Technological University

In his famous 1982 lecture, Nobel laureate Richard Feynman seeded the idea of quantum computation. He reasoned that the amount of classical information required to describe a quantum system scaled exponentially with its size, and thus could not be efficiently simulated by a classical computer. Indeed, a fairly modest system of 100 quantum bits would already require more information to describe than all the present data storage

关键词： A classical algorithm to mimic quantum decisions

Remote Interference Source Localization: A Multi-UAV-Based Cooperative Framework

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Chinese Journal of Electronics 2022年第3期31卷 442-455页

作者： WU guangyu gu Jiangchun Department of Computer Science and Technology University of Science and Technology of China School of Communication Engineering Army Engineering University of PLA

Interference source localization with high accuracy and time efficiency is of crucial importance for protecting spectrum resources. Due to the flexibility of unmanned aerial vehicles(UAVs), exploiting UAVs to locate the interference source has attracted intensive research interests. The off-the-shelf UAV-based interference source localization schemes locate the interference sources by employing the UAV to keep searching until it arrives at the target. This obviously degrades time efficiency of localization. To balance the accuracy and the efficiency of searching and localization, this paper proposes a multi-UAV-based cooperative framework alone with its detailed scheme, where search and remote localization are iteratively performed with a swarm of UAVs. For searching, a low-complexity Q-learning algorithm is proposed to decide the direction of flight in every time interval for each UAV. In the following remote localization phase, a fast Fourier transformation based location prediction algorithm is proposed to estimate the location of the interference source by fusing the searching result of different UAVs in different time intervals. Numerical results reveal that in the proposed scheme outperforms the stateof-the-art schemes, in terms of the accuracy, the robustness and time efficiency of localization.

关键词： unmanned aerial vehicles low-complexity Q-learning algorithm path planning fast Fourier transforms remote interference source localization multi-robot systems UAV swarm mobile robots remote localization location prediction algorithm aerospace robotics autonomous aerial vehicles learning (artificial intelligence) fast Fourier transformation cooperative communication spectrum resources radiofrequency interference mobile radio flight direction multiUAV-based cooperative framework

Parameter feature extraction for hyperspectral detection of the shallow underwater target

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Science China(Technological Sciences) 2021年第5期64卷 1092-1100页

作者： XIA Zhi gu YanFeng Acoustic Science and Technology Laboratory Harbin Engineering UniversityHarbin 150001China College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001China School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001China

For the detection of shallow underwater targets by the hyperspectrum, the information of the target is carried in the water-leaving radiation. However, the differences between the water-leaving radiation of the underwater target and the ocean background radiation are not significant, and the spectrum of the water-leaving radiation is sensitive to the changes of the marine environment. Therefore, taking the spectrum as the feature is not stable for hyperspectral detection of the underwater target. In this paper, we propose a parameter feature extraction method for hyperspectral detection of the shallow underwater target. The presence of an underwater target would change the optical properties of seawater in a local place. Based on that, a quasianalytical model of the water-leaving radiation is adopted to inverse the properties of the marine environment from the radiated spectrum. Then the inversed water depth and bottom reference reflectance are taken as the features. Simulation results show that the samples which belong to the water-leaving radiation of underwater target have higher inversed depth and reference reflectance than that belong to the ocean background radiation. Furthermore, these two kinds of samples can be separated significantly and stably in a 2-dimension feature space.

关键词： hyperspectral imaging underwater technology feature extraction

Dancing of electromagnetic spectra driven by metasurfaces

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National Science Review 2019年第3期6卷 379-380页

作者： Min gu Laboratory of Artificial-Intelligence Nanophotonics School of Science RMIT University

In 2011, Capasso proposed the concept of manipulating electromagnetic (EM) waves with phase modulation by an ultrathin flat metasurface composed of nanoantenna arrays[1]. Later, researchers developed different kinds of new metasurfaces, such as hyperbolic metasurfaces, tunable metasurfaces and non-linear metasurfaces[2]. The development of metasurfaces has greatly enhanced the capability to manipulate EM waves with multiple functionalities

关键词： Dancing of electromagnetic spectra driven by metasurfaces domain DCM

HSS METHOD WITH A COMPLEX PARAMETER FOR THE SOLUTION OF COMPLEX LINEAR SYSTEM

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Journal of Computational Mathematics 2011年第4期29卷 441-457页

作者： guiding gu Department of Applied Mathematics Shanghai University of Finance and Economics Shanghai 200433 China

In this paper, a complex parameter is employed in the Hermitian and skew-Hermitian splitting （HSS） method （Bai, Golub and Ng： SIAM J. Matrix Anal. Appl., 24（2003）, 603-626） for solving the complex linear system Ax = f. The convergence of the resulting method is proved when the spectrum of the matrix A lie in the right upper （or lower） part of the complex plane. We also derive an upper bound of the spectral radius of the HSS iteration matrix, and a estimated optimal parameter a （denoted by a^st） of this upper bound is presented. Numerical experiments on two modified model problems show that the HSS method with a est has a smaller spectral radius than that with the real parameter which minimizes the corresponding upper hound. In particular, for the ＇dominant＇ imaginary part of the matrix A, this improvement is considerable. We also test the GMRES method preconditioned by the HSS preconditioning matrix with our parameter a est.

关键词： Hermitian matrix Skew-Hermitian matrix Splitting iteration method Complex linear system Complex parameter.

Some important aspects of wind-resistant studies on long-span bridges

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Science China(Technological Sciences) 2012年第12期55卷 3334-3343页

作者： gu Ming State Key Laboratory of Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China

In recent years many long-span bridges have been or are being constructed in the world, especially in China. Wind loads and responses are the key factors for their structural design. This paper introduces some important achievements of wind-resistant studies of the author's research team on long-span bridges. First, new concepts and identification methods of aerodynamic derivatives and aerodynamic admittances were proposed. Then mechanical and aerodynamic control strategies and methods of wind-induced vibrations of long-span bridges were the great concerned problems, and valuable achievements were presented. Especially, great efforts which have been theoretically and experimentally made on rain-wind induced vibration of cables of cable-stayed bridges were described. Finally, some new progresses in computation wind engineering were introduced, and a new method for simulating an equilibrium boundary layer was put forward as well.

关键词： long-span bridge aerodynamic derivative and admittance flutter and buffeting control rain-wind induced vibration ofstay cable computation wind engineering equilibrium boundary layer

Systems Engineering in China

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Journal of Systems Engineering and Electronics 1993年第2期4卷 13-18页

作者： Jifa, gu Academia Sinica Beijing China

A short history of systems engineering (SE) is described. The reasons why research work moves from operations research (OR), management science (MS) and cybernetics to SE in China are given. This paper indicates some ... 详细信息

关键词： Cybernetics Management Operations research Systems science

Extended Decision Model for Energy System

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Journal of Systems Engineering and Electronics 1993年第2期4卷 19-27页

作者： Peiliang, gu Tianjin Univ Tianjin China

In the past, decision model for energy system only provides usable tools to support decision making. It didn't probe the way to improve decision making process. The extended decision model for energy system, proposed in this paper, couples energy planning & evaluating system and energy expert system. It can play a part of an adviser and assistant in the decision making process of energy department.

关键词： Energy management Systems engineering

Latest research progress for LBE coolant reactor of China initiative accelerator driven system project

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Frontiers in Energy 2021年第4期15卷 810-831页

作者： Long gu Xingkang SU Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China

China’s accelerator driven subcritical system(ADS)development has made significant progress during the past *** the successful construction and operation of the international prototype of ADS superconducting proton linac,the lead-based critical/subcritical zero-power facility VENUS-II and the comprehensive thermal-hydraulic and material test facilities for LBE(lead bismuth eutectic)coolant,China is playing a pivotal role in advanced steady-state operations toward the next step,the ADS *** China initiative Accelerator Driven System(CiADS)is the next facility for China’s ADS program,aimed to bridge the gaps between the ADS experiment and the LBE cooled subcritical *** total power of the CiADS will reach 10 *** CiADS engineering design was approved by Chinese government in *** then,the CiADS project has been fully transferred to the construction application *** subcritical reactor is an important part of the whole CiADS ***,a pool-type LBE cooled fast reactor is chosen as the subcritical reactor of the *** and thermal experiments and software development for LBE coolant were conducted simultaneously to support the design and construction of the CiADS LBEcooled subcritical ***,it is necessary to introduce the efforts made in China in the LBE-cooled fast reactor to provide certain supporting data and reference solutions for further design and development for ***,the roadmap of China’s ADS,the development process of the CiADS,the important design of the current CiADS subcritical reactor,and the efforts to build the LBE-cooled fast reactor are presented.

关键词： LBE(lead bismuth eutectic)coolant reactor China initiative Accelerator Driven System(CiADS)project research progress