Qiyong Liu

Early Warning (United States)

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Qun Zhang

Air Force Engineering University

Ding Guoyong

LI Xue-wen

China University of Geosciences

Baofa Jiang

Shandong University

Yi‐Chang Chen

Xinjiang University

Ying Luo

Air Force Engineering University

Qingyun Wei

Shanghai Jiao Tong University

Fu-fei Gu

China Ocean Shipping (China)

YU Chun-lai

Air Force Engineering University

Bin Zhao

University of Chinese Academy of Sciences

Cooperative Institutions

Chinese Academy of Sciences

Air Force Engineering University

University of Chinese Academy of Sciences

South China Institute of Collaborative Innovation

Shandong University

Qingdao University

Shanghai Institute of Microsystem and Information Technology

State Key Laboratory of Transducer Technology

Early Warning (United States)

Tsinghua University

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Conceptual Model Framework of Intelligent Distributed Ew Operations Based on OPM

Atlantis Highlights in Computer Sciences/Atlantis highlights in computer sciences (2023)

Zheng Li Mingyue Feng Jianhao Liu Qingyun Wei Qiyong Liu

Modern warfare is increasingly intelligent and distributed, so a unified model framework is needed for future electronic warfare to ensure effective team communication and consistency among models.Therefore, an electronic warfare model framework based on OPM is proposed in this paper.The framework formally describes the elements of entity, environment, information and process involved in military action, and models intelligent distributed electronic warfare from four aspects: top-level conceptual model, operational entity model, operational action conception generation model and operational action process model, which provides a way of thinking for relevant personnel.

Conceptual model

Electronic warfare

10.2991/978-94-6463-040-4_241

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Citations (1)

Precision Downward-Looking 3D Synthetic Aperture Radar Imaging with Sparse Linear Array and Platform Motion Parameters Estimation

Remote Sensing (2018)

Qiyong Liu Ying Luo Qun Zhang Wen Hong Tat‐Soon Yeo

The downward-looking sparse linear array three-dimensional synthetic aperture radar (DLSLA 3D SAR) has attracted a great deal of attention, due to the ability to obtain three-dimensional (3D) images. However, if the velocity and the yaw rate of the platform are not measured with enough accuracy, the azimuth signal cannot be compressed and then the 3D image of the scene cannot be obtained. In this paper, we propose a method for platform motion parameter estimation, and downward-looking 3D SAR imaging. A DLSLA 3D SAR imaging model including yaw rate was established. We then calculated the Doppler frequency modulation, which is related to the cross-track coordinates rather than the azimuth coordinates. Thus, the cross-track signal reconstruction was realized. Furthermore, based on the minimum entropy criterion (MEC), the velocity and yaw rate of the platform were accurately estimated, and the azimuth signal compression was also realized. Moreover, a deformation correction procedure was designed to improve the quality of the image. Simulation results were given to demonstrate the validity of the proposed method.

SIGNAL (programming language)

10.3390/rs10121957

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Citations (5)

Tunable graphene-based infrared perfect absorber for sensing

2022 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO) (2017)

Peng Sun Fengnian Xia Lili Liu Lipeng Jiao Kai Chen

In this paper, we proposed a perfect absorber composed of a periodic double-layer graphene ribbon arrays placed on a metallic reflector separated by a dielectric layer for infrared sensing. The anti-symmetric dipole-dipole coupling mode is excited as the impedance matchingCnar-rowband absorption spectrum. Numerical simulations show that the absorption and reflection properties of the absorber are sensitive to the refractive index of the surrounding medium. Furthermore, the plasmon resonance wavelength can be tuned by varying the Fermi energy level of graphene. Such a plas-monic absorber with high sensitivity can be beneficial for chemical and biosensor applications.

Reflector (photography)

10.1109/3m-nano.2017.8286324

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Citations (6)

Design and application of hydrogen energy trading system based on blockchain technology

Yong Zeng Qiyong Liu Jiayin Wang Yixin Luo

In recent years, with the continuous increase of renewable energy installation capacity, China has been facing increasingly severe problems of abandoned wind, abandoned light and abandoned water. Hydrogen energy as a feasible solution to this problem has attracted widespread attention. As an emerging secondary energy source, hydrogen faces trust and efficiency challenges in transactions due to its short development time and immature market, urgently requiring an optimized transaction mechanism and a trusted and efficient trading environment to adapt to complex trading markets. Therefore, this paper constructs a blockchain-based hydrogen energy trading system. Firstly, it proposes a mechanism for generating consumption vouchers for hydrogen energy, transactions and traceability. Then it designs the overall architecture system based on blockchain technology with core capabilities such as efficient consensus mechanisms, trustworthy transactions, identity authentication and credit evaluation to build the hydrogen energy trading system. Finally, the testing is conducted on multiple devices with multiple nodes deployed, which verifies the completeness and practicability of the system.

10.1117/12.3009443

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Mainlobe Jamming Suppression Using Improved Frequency Diverse Array with MIMO Radar

Journal of Sensors (2019)

Guangming Li Qun Zhang Qiyong Liu Jia Liang Dan Wang

Frequency diverse array (FDA) has attracted much attention in recent years due to its range-angle-dependent beampattern. Multiple-input multiple-output (MIMO) radar can offer waveform diversity to increase the virtual aperture length for azimuth coherent focus processing in radar imaging. Combining the advantages of FDA and MIMO radar, FDA-MIMO radar can steer multiple beams to different targets in the same line of sight (LOS) of radar with different waveforms. In this paper, an improved FDA model with the logistic map is proposed to get the aperiodic and range-angle uncoupling beampattern. Based on the proposed FDA, combining the FDA-MIMO radar, the waveform and chirp rate jitter techniques are adopted to mainlobe jamming suppression. Simulation results show the effectiveness of the proposed method.

Aperiodic graph

10.1155/2019/3948597

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Citations (5)

Fast algorithm for sparse signal reconstruction based on off‐grid model

IET Radar Sonar & Navigation (2018)

Qiyong Liu Qun Zhang Ying Luo Kaiming Li Li Sun

In traditional compressed sensing theory, the authors have to adopt a discretisation procedure to reduce the continuous parameter space to a finite set of grid points. The discretisation procedure will cause the off‐grid effect, which result in the reconstruction result unstable. To solve this problem, an alternating iteration algorithm is proposed which is built on the greedy‐like algorithms. Firstly, a multilayer first‐order approximation model is proposed to approximate the true observation model in the off‐grid model. Then, an alternating iteration algorithm is proposed to estimate the sparse signal and mismatch factor. Moreover, the computational complexities of the proposed algorithm with different greedy algorithms are discussed. Finally, simulations demonstrate the good performance of the proposed algorithm. Meanwhile, the performance of the proposed method will not be influenced by the correlation of dictionary matrix and mismatch matrix.

SIGNAL (programming language)

10.1049/iet-rsn.2017.0319

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Citations (10)

Microfabricated Semipacked Gas Chromatography Columns Embedded High Density Elliptic Cylindrical Posts

Boxin Chen Fei Feng Yangyang Zhao Qiyong Liu Bin Zhao

A new microfabricated gas chromatography column (μGC-column) called semi-packed column embedded high density elliptic cylindrical posts (SPC-HDECPs) was reported in this paper. There are six elliptic cylindrical posts in the cross-section perpendicular to the gas flow in the 250 μm-wide straight silicon microchannel of SPC- HDECPs. Compared to semi-packed columns with cylindrical posts (SPC-CPs) in identical micro-channel at the same effective width (130 μm), SPC-HDECPs have a 327% improvement in the number of theoretical plates of the octane due to the surface area is increased by 71%.

Microchannel

10.1109/mems51782.2021.9375154

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Citations (2)

HR estimates of flooding (A) and waterlogging (B) on the risk of malaria in different lagged days.

Ding Guoyong Gao Lu LI Xue-wen Zhou Maigeng Qiyong Liu

Waterlogging (archaeology)

10.1371/journal.pone.0097520.g004

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Observation on the Efficacy of Betacyfluthrin SC 2.5 against Mosquito, Housefly and Cockroach in Laboratory

Zhongguo meijie shengwuxue ji kongzhi zazhi (2003)

Song Xiu-ping Qiyong Liu Wang Mei-xiu

Objective To observe the efficacy of 2.5% betacyfluthrin SC against the insect pests of public health importance in lab. Methods It was conducted with the forcing-contact method according to the national test standard for insecticide registration GB139.17.1-92. Results The efficacy tests of 2.5% betacyfluthrin SC were made against Culex pipiens pallens, Musca domestica vicina and Blattella germanica in labortory. On the glass surface of all the three, the application quantity was the least, the efficacy was the best, the long-lasting efficacy was over 90 days for the three insects. Conclusion The efficacy of 2.5% betacyfluthrin SC belonged to class A according to the national standard for insecticide registration.

Housefly

German cockroach

Nuisance

National standard

Source

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Down-Looking Sparse Linear Array 3-D Sar Imaging Based on Motion Compensation

IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium (2018)

Qiyong Liu Kaiming Li Wenjun Huo Zhiqiang Ma Fu-fei Gu

In this paper, we proposed a method based on the minimum entropy principle to compensate the motion error. Since the impact of air disturbance and the flight attitude, there is a motion error of the platform motion. The motion error will cause the imaging defocusing, which will influence the quality of the imaging. Firstly, we established the imaging model of down-looking sparse linear array 3-D SAR imaging with motion error. Then, the impact of motion error is analyzed. A method based on minimum entropy principle is proposed to compensate the motion error. Finally, the cross-track signal reconstruction is finished by the compressed sensing. Experimental results demonstrated the effectiveness of the proposed method.

10.1109/igarss.2018.8518052

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Citations (1)