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2nd International Conference on Computer, Big Data and Artificial Intelligence, ICCBDAI 2021

作者： Chi, Huixuan Wang, Yuying Hao, Qinfen Xia, Hong Institute of Computing Technology Chinese Academy of Sciences Beijing China School of Control and Computer Engineering North China Electric Power University Beijing China

Graph Convolutional Networks (GCNs) and subsequent variants have been proposed to solve tasks on graphs, especially node classification tasks. In the literature, however, most tricks or techniques are either briefly mentioned as implementation details or only visible in source code. In this paper, we first summarize some existing effective tricks used in GCNs mini-batch training. Based on this, two novel tricks named GCN_res Framework and Embedding Usage are proposed by leveraging residual network and pre-trained embedding to improve baseline’s test accuracy in different datasets. Experiments on Open Graph Benchmark (OGB) show that, by combining these techniques, the test accuracy of various GCNs increases by 1.21%∼2.84%. We open source our implementation at https://***/ytchx1999/PyGOGB-Tricks. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： Convolution

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Numerical simulation of cylinder falling in flow using openfoam 30

Numerical simulation of cylinder falling in flow using openf...

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30th International Ocean and Polar engineering Conference, ISOPE 2020

作者： Chen, Wenshu Ma, Xin Bai, Wei Li, Yibin School of Control Science and Engineering Shandong University JinanShandong Province China Department of Computing and Mathematics Manchester Metropolitan University Manchester United Kingdom

ISBN: (纸本)9781880653845

In the process of offshore working, payloads of offshore cranes may suffer from flow disturbances. In this work, OpenFOAM is used to simulate the interaction between payloads and the ocean flow after it enters water. Firstly, two-dimensional model of flow around cylinder at a low Reynolds and the cylinder free-falling in fluids are verified with the existing data to verify the model. On this basis, the overset dynamic grid technique is used to simulate the free fall of the horizontal cylinder in flow. The extensive simulation results can be used to further study the safe movement control of underwater payloads. © 2020 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Circular cylinders

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Laboratory analyses of nutrient release processes from Haihe River sediment

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International Journal of Sediment Research 2012年第1期27卷 61-72页

作者： Min WU Xue-ming SUN Sui-liang HUANG Xian-qiang TANG Miklas SCHOLZ Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of Education Nankai University Numerical Simulation Group for Water Environment Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai University Civil Engineering Research Centre School of ComputingScience and EngineeringThe University of Salford

Sediment samples were collected from the heavily contaminated Haihe River to conduct static nutrient release experiments with tap water,and to evaluate the effect of dredging depths,salinity and light on the corresponding release *** study is significant because it helps decision-makers to assess the likely impact of dredging(***) on contaminated freshwater and brackish *** concentrations of total nitrogen and inorganic phosphorus were approximately 950 mg/kg and 760 mg/kg,*** typical organic matter concentration was 8.6%.Data obtained from the nutrient leaching experiments indicated that 5cm-dredging of sediment reduced the water column total phosphorus,total dissolved phosphorus and ammonia-nitrogen concentrations *** contrast,dredging 10cm surface sediment could improve the water *** salinity values benefited the release of nitrogen and phosphorus from *** contrast to indoor experiments, concentrations of total phosphorus,total dissolved phosphorus and ammonia-nitrogen were higher for the outdoor experiments.

关键词： Aquatic sediment and water interaction Water quality management Nitrogen Phosphorus Salinity Dredging Water depth Light Haihe River China

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A long range UHF RFID tag for metallic objects

A long range UHF RFID tag for metallic objects

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作者： Barbin, Manoel Vitório Yacoub, Michel Daoud Barbin, Silvio Ernesto Communications Department Faculty of Electrical and Computing Engineering University of Campinas Brazil Telecommunication and Control Engineering Department Polytechnic School of Engineering University of São Paulo Brazil

ISBN: (纸本)9781934142301

The performance of passive UHF RFID tags, commonly available in the market, is significantly degraded when they are placed near a conducting surface. A possible solution to overcome this problem is to design tags based on PIFA (Planar Inverted F Antenna) the performance of which is less sensitive to the presence of objects in its surroundings. This ability is mainly due to the existence of a ground plane inherent to its structure. In this paper, a PIFA is utilized in the design of a passive tag that can be used to identify metallic objects with medium to large dimensions. A new type of antenna feeder is presented with a slot in the radiating element where the RFID IC is attached. The maximum range of utilization, covering all licensed RFID UHF bands (860 to 960MHz), is in excess of 8m, according to simulations using a MoM based software, verified by practical measurements. Further results from simulation and measurements show that the tag can also be used attached to other materials with good performance.

关键词： Radio frequency identification (RFID)

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Long‐time target tracking algorithm based on re‐detection multi‐feature fusion

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IET Cyber-Systems and Robotics 2022年第1期4卷 38-50页

作者： Junsuo Qu Chenxue Tang Yuan Zhang Kai Zhou Abolfazl Razi School of Automation Xi'an Key Laboratory of Advanced Control and Intelligent ProcessXi'an University of Posts and TelecommunicationsXi'anShaanxiChina School of Communication and Information Engineering Xi'an University of Posts and TelecommunicationsXi'anShaanxiChina School of Informatics Computing and Cyber SystemsNorthern Arizona UniversityFlagstaffAZUSA

This paper considers the problem of long-term target tracking in complex scenes when tracking failures are unavoidable due to illumination change,target deformation,scale change,motion blur,and other *** specifically,a target tracking algorithm,called re-detection multi-feature fusion,is proposed based on the fusion of scale-adaptive kernel correlation filtering and *** target tracking algorithm trains three kernel correlation filters based on the histogram of oriented gradients,colour name,and local binary pattern features and then obtains the fusion weight of response graphs corresponding to different features based on average peak correlation energy criterion and uses weighted average to complete the position estimation of the tracked *** order to deal with the problem that the target is occluded and disappears in the tracking process,a random fern classifier is trained to perform re-detection when the target is *** comparing the OTB-50 target tracking dataset,the experimental results show that the proposed tracker can track the target well in the occlusion attribute video sequence in the OTB-100 test dataset and has a certain improvement in tracking accuracy and success rate compared with the traditional correlation filter tracker.

关键词： machine learning pedestrian identification robustness visual surveillance visual tracking

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Aerodynamic/control integrated optimization method for unpowered high-speed vehicle configuration design

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Chinese Journal of Aeronautics 2024年第7期37卷 153-167页

作者： Xin PAN Linlin WANG Li LI Lulu JIANG Gang CHEN State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China Shannxi Key Laboratory for Environment and Control of Flight Vehicle School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China Beijing Institute of Space Long March Vehicle Beijing 100076China AVIC Xi’an Aeronautics Computing Technique Research Institute Xi’an 710068China

The unpowered high-speed vehicle experiences a significant coupling between the disciplines of aerodynamics and control due to its characteristics of high flight speed and extensive maneuverability within large *** conventional aircraft conceptual design process follows a sequential design approach,and there is an artificial separation between the disciplines of aerodynamics and control,neglecting the coupling effects arising from their *** a result,this design process often requires extensive iterations over long periods when applied to high-speed vehicles,and may not be able to effectively achieve the desired design *** enhance the overall performance and design efficiency of high-speed vehicles,this study integrates the concept of Active control Technology(ACT)from modern aircraft into the philosophy of aerodynamic/control integrated *** integrated optimization strategies,with differences in coupling granularity,have been ***,these strategies are put into action on a biconical vehicle that operates at Mach *** results reveal that the comprehensive performance of the synthesis optimal model derived from the aerodynamic/control integrated optimization strategy is improved by 31.76%and 28.29%respectively compared to the base model under high-speed conditions,demonstrating the feasibility and effectiveness of the method and optimization strategies ***,in comparison to the single-stage strategy,the multi-stage strategy takes into deeper consideration the impact of control *** a result,the control performance of the synthesis opti-mal model derived from the multi-stage strategy improves by 13.99%,whereas the single-stage strategy only achieves a 5.79%*** method enables a fruitful interaction between aerodynamic configuration design and control system design,leading to enhanced overall performance and design ***,it improves the controllability of high-sp

关键词： Aerodynamic/control Integrated Optimization MDO High-speed vehicle Shape Optimization controllability

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3D interactive clothing animation

3D interactive clothing animation

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2010 International Conference on Computer Application and System Modeling, ICCASM 2010

作者： Min, Shi Tianlu, Mao Zhaoqi, Wang School of Control and Computer Engineering North China Electric Power University School of the Chinese Academy of Sciences Beijing China Institute of Computing Technology Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781424472369

A framework for clothing animation is developed in this paper. It integrates several key techniques involved in clothing animation. Firstly, an improved mechanical model with real material parameters are used to simulate various types of cloth realistically. Secondly, efficient distance constraints are introduced into our cloth model that effectively limits cloth extensible deformation in the plane without breaking bending deformation. Thirdly, an accelerated algorithm on GPU in collision detection process ensures responsible cloth animation. At last, an interactive system is set up on the three-tier architecture that provides users with some basic functionalities including cloth animation, human model editing and clothing simulation. The interactive editor provides a set of intuitive tools for animators to design a rich variety of human shapes and cloth animation. As a prototype system for clothing animation and virtual dressing, it is fast, reliable and expandable. © 2010 IEEE.

关键词： Animation

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Fuzzy Filter Design for Affine Systems with Sensor Faults:A Dynamic Event-Triggered Approach

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Journal of Systems Science & Complexity 2022年第5期35卷 1761-1784页

作者： CHENG Jun WU Yuyan WU Zhengguang LI Kezan School of Mathematics and Statistics Center for Applied Mathematics of GuangxiGuangxi Normal Univer-sityGuilin 541006China School of Mathematics and Statistics Guangxi Normal UniversityGuilin 541006China School of Information Science and Engineering Chengdu UniversityChengdu 610106China Institute of Cyber-Systems and Control Zhejiang UniversityHangzhou 310027China School of Mathematics and Computing Science Guilin University of Electronic TechnologyGuilin 541004China

This study addresses the issue of dynamic event-triggered-based filtering for fuzzy affine *** alleviate the utilization of constraint bandwidth resources and improve the efficiency of the signals exchange,a dynamic event-triggered protocol is forwarded to regulate the trigger instants with objective system ***,the nonhomogeneous Markov process is proposed to characterize the dynamic behaviors of sensor faults,where the time-varying transition probabilities belong to a convex polytope ***,the validity and applicability of devised filter design methodology for fuzzy affine systems are displayed via two practical models.

关键词： Dynamic event-triggered protocol fuzzy affine systems nonhomogeneous Markov process sensor fault

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Cooperative guidance strategy for multiple hypersonic gliding vehicles system

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Chinese Journal of Aeronautics 2020年第3期33卷 990-1005页

作者： Jianglong YU Xiwang DONG Qingdong LI Zhang REN Jinhu LV School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control LaboratoryBeihang UniversityBeijing 100083China Beijing Advanced Innovation Center for Big Data and Brain Computing Beihang UniversityBeijing 100083China Shananxi Key Laboratory of Integrated and Intelligent Navigation Xi’an 710068China

Cooperative guidance strategy for multiple hypersonic gliding vehicles system with flight constraints and cooperative constraints is *** paper mainly cares about the coordination of the entry glide flight phase and driving-down *** from the existing results,both the attack time and the attack angle constraints are considered ***, for the entry glide flight phase, a two-stage method is proposed to achieve the rapid cooperative trajectories planning, where the control signal corridors are designed based on the quasi-equilibrium gliding *** the first stage, the bank angle curve is optimized to achieve the attack angle *** the second stage, the angle of attack curve is optimized to achieve the attack time *** optimized parameters can be obtained by the secant ***, for the driving-down phase, the cooperative terminal guidance law is designed where the terminal attack time and attack angle are *** guidance law is then transformed into the bank angle and angle of attack *** cooperative guidance strategy is summarized as an ***, a numerical simulation example with three hypersonic gliding vehicles is provided for revealing the effectiveness of the acquired strategy and algorithm.

关键词： Attack angle constraints Attack time constraints Cooperative guidance Cooperative path planning Entry guidance Hypersonic vehicles

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Fluid structure coupling analysis of boundary layer streaming driving micropump

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Sensors and Transducers 2013年第4期151卷 24-29页

作者： Wei, Changzhi Wei, Shoushui Liu, Feifei School of Control Science and Engineering Shandong University No.17923 Jingshi Road Jinan Shandong 250061 China Shandong Provincial Key Laboratory of Network based Intelligent Computing No.106 Jiwei Road Jinan Shandong 250022 China

An acoustic streaming micropump driven by boundary layer streaming is proposed. The streaming velocity is simulated by employing the direct streaming method. When the vibration displacement is 0.1 μm with a driving frequency of 1.0 MHz, an average outlet velocity of 4.87 mm/s can be obtained. Analysis indicates that the average outlet velocity is proportional to the square of the vibration displacement and the driving frequency. When the fluid viscosity is less than 10-4 Pa&bulls, the average outlet velocity remains unchanged, otherwise the average outlet velocity decreases with the fluid viscosity increasing. Finally the influence of back pressure on the average outlet velocity is simulated and the maximum back pressure of the designed acoustic streaming micropump achieved is 135 Pa. © 2013 IFSA.

关键词： Computational fluid dynamics

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