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21st International Conference on Electronic Packaging technology, ICEPT 2020

作者： Ning, Zhang Siyang, Li Jun, Li Guangdong, Wu Fang, Yu Beijing Institute of Control Engineering Development Center of On-Board Computer and Electronics Beijing China Beijing Institute of Control Engineering Development Center of Packaging Technology Beijing China

ISBN: (纸本)9781728168265

Currently, SoC (System on Chip) components have been widely used in the aerospace electronic products and the PGA (Pin Grid Array) has been considered as one of the typical packaging patterns. Obviously, with the increase of the I/O density, the characteristics of the SoCs are approaching to a large volume and a heavy weight, which caused a big challenge to the packaging reliability issues. It is reported that the solder joints of the PGA packaging structure are susceptible to the random vibration. Thus, the reinforcement methods of the PGA packaging structure should be researched. Firstly, the effects of the different reinforcement methods on the typical PGA packaging structure are discussed by using the FEA simulation. The maximum stresses and the locations of the solder joints are mainly concerned and pointed out directly. From the comparison of the simulation results, it is found that the maximum stresses of the solder joints are totally located at the outer corners of the PGA packaging structures under the random vibration condition. Although the influence of the reinforcement pattern on the modals of the PCB board is small, it is seen that the reinforcing effect on the maximum stress of solder joints is remarkable. The efficient approach to improve the solder joints reliability is reinforcing at the middles and the ends of the PGA packaging structure. After that, the optimal reinforcement pattern and the sealing method are determined. Furthermore, based on the analysis results of the optimal reinforcement pattern, the classic Steinberg theory is employed to predict the life of the PGA packaging structure. It is obvious that the life of the solder joints is greatly prolonged compared to the one of the previous pattern. This approach can be recommended to solve the similar problems in the packaging industry. © 2020 IEEE.

关键词： Stress analysis

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FAULT FINDER - A PC BASED EXPERT SYSTEM

FAULT FINDER - A PC BASED EXPERT SYSTEM

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1990 SYMP ON SMALL SYSTEMS

作者： ELLIOTT, W SCHNEIDER, M HARRIS Air Traffic Control Systems Division United States Computer Science Department Florida Institute of Technology United States

ISBN: (纸本)0897913477

The FAULT FINDER Expert System implements fault isolation decisions for any target system or equipment that can be modeled by lowest replaceable units (hereafter called LRUs). The term "Target System" will be used to refer to the system being fault isolated. The Fault Finder expert system fault isolates the target system's LRUs. This expert system utilizes a data base to represent each LRU, a status interface to obtain LRU status, and a knowledge base to store the rules of fault isolation for the target system. The expert system has multiple "learning" capabilities in the data base, the knowledge base and die inference procedure. Another aspect of learning which influences the structure of the knowledge base is that each rule has parameters associated with it to store the information learned as a result of user feedback and the inference process. The certainty or possibility associated with the conclusion of each rule is adjusted as the system runs and gains experience. The inference procedure uses fuzzy logic for premise matching certainty, and combining of premise certainties for the rule firing certainty. This expert system brings together for the first time a fault isolation system with unique knowledge representation, inference processing, fuzzy logic, and multiple learning capabilities in one design. Also presented are issues of knowledge structure, and possible types of fault isolation knowledge. © 1990 ACM.

关键词： Knowledge representation

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Comparison between sampled-data control, deadband control and model-based event-triggered control

Comparison between sampled-data control, deadband control an...

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4th IFAC Conference on Analysis and Design of Hybrid Systems, ADHS'12

作者： Lehmann, D. Lunze, J. Johansson, K.H. Automatic Control Laboratory KTH Royal Institute of Technology Stockholm 100 44 Sweden Institute of Automation and Computer Control Ruhr-University Bochum Bochum 44780 Germany

ISBN: (纸本)9783902823007

This paper investigates the stability as well as communication properties of sampleddata control and two event-triggered control schemes: deadband control and model-based eventtriggered control. After proposing a uniform representation, these schemes are compared by deriving approximation error bounds with respect to the behavior of the continuous-time statefeedback loop and by specifying lower bounds on the minimum inter-sampling times. The results show that, under the conditions derived in this paper, the model-based approach guarantees the best stability and communication properties which is also demonstrated by a numerical example. © 2012 IFAC.

关键词： Networked control systems

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Interoperability issues in sharing electronic healthcare records - the synapses approach 3

Interoperability issues in sharing electronic healthcare rec...

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3rd IEEE International Conference on Engineering of Complex computer Systems (ICECCS 97)

作者： Grimson, J Felton, E Stephens, G Grimson, W Berry, D Department of Computer Science Trinity College Dublin Ireland School of Control Systems and Electrical Engineering Dublin Institute of Technology Ireland

ISBN: (纸本)0818681268

This paper describes the approach to information sharing being adopted by Synapses, a pan-European project funded under the EU Health Telematics Programme. The emphasis in Synapses is on developing standards to enable sharing, in whole or in part, of electronic healthcare records between distributed healthcare providers and institutions. The current technological solutions available for data sharing, including federated database systems, gateways, data warehousing, messaging and the web are insufficient on their own to meet the needs of Synapses. Thus in Synapses several different, bur complementary technologies are merged in an open, distributed object-oriented environment. Furthermore, in order to safeguard the legal, ethical and clinical integrity of the record, it is essential not only to preserve the meaning of the data being transferred, but also its context and structure. Synapses solves this problem by defining a standard architecture for the federated electronic healthcare record.

关键词： Telematics

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An Efficient Impersonation Attack Detection Method in Fog Computing

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computers, Materials & Continua 2021年第7期68卷 267-281页

作者： Jialin Wan Muhammad Waqas Shanshan Tu Syed Mudassir Hussain Ahsan Shah Sadaqat Ur Rehman Muhammad Hanif Engineering Research Center of Intelligent Perception and Autonomous Control Faculty of Information TechnologyBeijing University of TechnologyBeijing100124China Faculty of Computer Science and Engineering Ghulam Ishaq Khan Institute of Engineering Sciences and TechnologyTopi23460Pakistan Department of Electronics Engineering FICTBalochistan University of Information TechnologyEngineering and Management SciencesQuetta87300Pakistan Department of Computer Science Namal InstituteMianwali42200Pakistan

Fog computing paradigm extends computing,communication,storage,and network resources to the network’s *** the fog layer is located between cloud and end-users,it can provide more convenience and timely services to ***,in fog computing(FC),attackers can behave as real fog nodes or end-users to provide malicious services in the *** attacker acts as an impersonator to impersonate other legitimate ***,in this work,we present a detection technique to secure the FC ***,we model a physical layer key generation based on wireless channel *** generate the secret keys between the legitimate users and avoid impersonators,we then consider a Double Sarsa technique to identify the impersonators at the receiver *** compare our proposed Double Sarsa technique with the other two methods to validate our work,i.e.,Sarsa and *** simulation results demonstrate that the method based on Double Sarsa outperforms Sarsa and Q-learning approaches in terms of false alarm rate(FAR),miss detection rate(MDR),and average error rate(AER).

关键词： Fog computing double Sarsa attack detection physical layer key security

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Nonlinear observability of grinding mill conditions

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IFAC-PapersOnLine 2016年第20期49卷 13-18页

作者： le Roux, J.D. Steinboeck, A. Kugi, A. Craig, I.K. Department of Electrical Electronic and Computer Engineering University of Pretoria Pretoria South Africa Automation and Control Institute Vienna University of Technology Gußhausstraße 27-29 Vienna1040 Austria Christian Doppler Laboratory for Model-Based Control in the Steel Industry Automation and Control Institute Vienna University of Technology Gußhausstraße 27-29 Vienna1040 Austria

A nonlinear observer model of a grinding mill is developed. The model distinguishes between the volumetric hold-up of water, solids, rocks and balls in the mill, where solids are all ore small enough to discharge through the end-discharge grate, and rocks are all ore too large to discharge. The model includes the discharge rate, abrasion rate of rocks and the abrasion rate of balls as parameters. It is shown that with mill discharge flow-rate, discharge density and volumetric hold-up measurements the model states and parameters are locally (weakly) nonlinearly observable, but not linearly observable. Although instrumentation at the mill discharge is not yet included in industrial circuits because of space restrictions, this study motivates the benefits to be gained from including instrumentation at the mill discharge. If mills are fitted with adequate measurement instrumentation at the discharge, important mill states and parameters can be estimated. © 2016

关键词： Ball mills Abrasion Comminution Flow rate Grinding (comminution) Grinding (machining) Grinding mills Observability Parameter estimation State estimation Abrasion rates Discharge density Discharge flow rates Discharge rates Industrial circuits Measurement instrumentation Non linear observer Nonlinear observability

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Modeling a spatial communication activity in wireless sensors network

Modeling a spatial communication activity in wireless sensor...

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8th International Workshop on Modeling and Applied Simulation, MAS 2009, Held at the International Mediterranean and Latin American Modeling Multiconference, I3M 2009

作者： Nikodem, Jan Klempous, Ryszard Nikodem, Maciej Woda, Marek Chaczko, Zenon Institute of Technical Cybernetics Wroclaw University of Technology Poland Institute of Computer Engineering Automatics and Robotics Wroclaw University of Technology Poland Institute of Computer Science Control and Robotics Faculty of Electronics Wroclaw University of Technology Poland University of Technology Sydney NSW Australia

ISBN: (纸本)9781629934747

This paper presents a novel method of modeling spatial communication activity in wireless sensor network (WSN). We define native aspects of communication in WSN. Focusing on local/global activity dilemma, cooperation, interference, network topology, and optimization aspects. A neighborhood abstraction is defined and we involve three binary relations: subordination, tolerance and collision to describe the cooperation in WSN. Using digital terrain model tools we model communication activity aspects as surfaces, stretched over WSN network. A network topology features are modeled using bare drainage surface. It is a component of a topographic map, which gives a direction towards the base station, determined by a slope of the modeled surface. Modeling node's instant energy level, we construct another surface represents node's instant level of consumed energy. Finally, we construct a drainage surface spread over each node neighborhood as superposition of bare drainage surface, energy consumed and relational surfaces.

关键词： Topology

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Generative Adversarial Networks:Introduction and Outlook

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IEEE/CAA Journal of Automatica Sinica 2017年第4期4卷 588-598页

作者： Kunfeng Wang Chao Gou Yanjie Duan Yilun Lin Xinhu Zheng Fei-Yue Wang IEEE State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Qingdao Academy of Intelligent Industries State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences University of Chinese Academy of Sciences Department of Computer Science and Engineering University of Minnesota Research Center for Computational Experiments and Parallel Systems Technology National University of Defense Technology

Recently, generative adversarial networks(GANs)have become a research focus of artificial intelligence. Inspired by two-player zero-sum game, GANs comprise a generator and a discriminator, both trained under the adversarial learning *** goal of GANs is to estimate the potential distribution of real data samples and generate new samples from that *** their initiation, GANs have been widely studied due to their enormous prospect for applications, including image and vision computing, speech and language processing, etc. In this review paper, we summarize the state of the art of GANs and look into the future. Firstly, we survey GANs' proposal background,theoretic and implementation models, and application ***, we discuss GANs' advantages and disadvantages, and their development trends. In particular, we investigate the relation between GANs and parallel intelligence,with the conclusion that GANs have a great potential in parallel systems research in terms of virtual-real interaction and integration. Clearly, GANs can provide substantial algorithmic support for parallel intelligence.

关键词： ACP approach adversarial learning generative adversarial networks(GANs) generative models parallel intelligence zero-sum game

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Resilient Estimation and control on k-Nearest Neighbor Platoons: A Network-Theoretic Approach

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IFAC-PapersOnLine 2018年第23期51卷 22-27页

作者： Pirani, Mohammad Hashemi, Ehsan Fidan, Baris Simpson-Porco, John W. Sandberg, Henrik Johansson, Karl Henrik Department of Automatic Control KTH Royal Institute of Technology China Department of Mechanical and Mechatronics Engineering University of Waterloo Canada Department of Electrical and Computer Engineering University of Waterloo Canada

This paper is concerned with the network-theoretic properties of so-called k-nearest neighbor intelligent vehicular platoons, where each vehicle communicates with k vehicles, both in front and behind. The network-theoretic properties analyzed in this paper play major roles in quantifying the resilience and robustness of three generic distributed estimation and control algorithms against communication failures and disturbances, namely resilient distributed estimation, resilient distributed consensus, and robust network formation. Based on the results for the connectivity measures of the k-nearest neighbor platoon, we show that extending the traditional platooning topologies (which were only based on interacting with nearest neighbors) to k-nearest neighbor platoons increases the resilience of distributed estimation and control algorithms to both communication failures and disturbances. © 2018

关键词： Robustness (control systems)

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Dual-Tone Radio Interferometric Positioning Systems for Multi-Target Localization Using a Single Mobile Anchor

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China Communications 2015年第1期12卷 25-35页

作者： LI Li'an WANG Yiyin MA Xiaoli CHEN Cailian GUAN Xinping Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China School of Electrical & Computer Engineering Georgia Institute of Technology

In this paper, a low-cost dualtone radio interferometric positioning system using a single mobile anchor is proposed to locate multiple targets at the same time. We name it mDRIPS. In mDRIPS, each target continuously transmits a dual-tone signal with its dedicated frequencies, and the mobile anchor receives the signals at different positions along its trajectory, Neither time synchronization between the mobile anchor and the targets nor time synchronization among the targets is required. We take the instability of targets clocks into consideration and develop an ESPRIT-type algorithm to estimate frequencies of each dual-tone signal. Furthermore, the time of arrival （TOA） of each target signal is extracted from the phase estimates of the received dual-tone signals. After measuring several TOAs at different locations along the anchor＇s trajectory, each target can be located. Since the frequency difference of the two tones of each dualtone signal is designed to be smaller than the channel coherence bandwidth, the same fading effect on these two tones can be eliminated. Moreover, the integer ambiguity problem due to phase wrapping is investigated, and a localization algorithm to deal with a simplified ambiguity problem is proposed. Numerical results demonstrate the efficiency of the proposed mDRIPS.

关键词： ranging localization mobile anchor radio interferometry oscillator instability

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