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Two-stage heuristic-correction for dynamic reactive power optimization based on relaxation-MPEC and MIQP

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical engineering 2014年第13期34卷 2100-2107页

作者： Ding, Tao Guo, Qinglai Bo, Rui Sun, Hongbin Wu, Wenchuan Zhang, Boming Yao, Zhengyi State Key Lab. of Control and Simulation of Power Systems and Generation Equipments Dept. of Electrical Engineering Tsinghua University Haidian District Beijing 100084 China Midwest ISO St. Paul 55108 United States Baoji Power Supply Bureau Baoji 721004 Shannxi Province China

To achieve a fast approach to the dynamic reactive power optimization model, a mixed integer nonlinear programming model was set up, with consideration of the discrete reactive power equipment operation limit and power grid security constraints, to minimize the transmission losses. Furthermore, a method called heuristic search and variable correction was proposed that for the first stage, the discrete variables are relaxed into continuous ones, which leads to an optimization model with equilibrium constraints. According to the optimal value of relaxed model, a mixed integer quadratic programming model is formulated to minimize the objective of approximation variance, satisfied the discrete switching operation constraints in primary model. For the second stage, the continuous variables are redressed with respect to the determined discrete variables. The impact of adjustment step and operation limit on the optimal solution was fully studied in IEEE 14-bus test system. Besides, the result of IEEE 30, 57, 118 test systems show that an optimal solution can fast be obtained by proposed method, and the precision satisfies the actual engineering, which can also employ the parallel technology. © 2014 Chinese Society for Electrical engineering.

关键词： Integer programming

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A hybrid genetic algorithm - Sequential quadratic programing approach for canting keel optimization in transverse stability of small boat design

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International Conference on Advanced engineering Theory and Applications 2013, AETA 2013

作者： Le, Tat-Hien Duy, Vo Hoang Phuong, Pham Nhat Nam, Jong-Ho Department of Naval Architecture and Marine Engineering Ho Chi Minh City University of Technology Viet Nam National Key Lab. of Digital Control and System Engineering Vietnam National University No. 19 Nguyen Huu Tho Street Ho Chi Minh City Viet Nam Faculty of Electrical and Electronics Engineering Ton Duc Thang University No. 19 Nguyen Huu Tho Street Ho Chi Minh City Viet Nam Division of Naval Architecture and Ocean Systems Engineering Korea Maritime University Busan Korea Republic of

ISBN: (纸本)9783642419676

The transverse stability is one of the most important characteristics of the ship in survivability. This factor can be influenced by wind, moving cargoes and passengers. In order to avoid maritime accidents due to parametric rolling, several ways are considered in the practical situation such as active and passive anti rolling method. The canting keel is a practical tool for the enhancement of ship stability. In the early ship design stage, this problem is considered to be multimodal objective problem. In the present research, a hybrid optimization technique, genetic algorithm - sequential quadratic programing (GA-SQP) is developed to determine the appropriate parametric values of design of canting keel. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Genetic algorithms

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CTrace: Semantic comparison of multi-granularity process traces 13

CTrace: Semantic comparison of multi-granularity process tra...

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2013 ACM SIGMOD Conference on Management of Data, SIGMOD 2013

作者： Liu, Qing Taylor, Kerry Zhao, Xiang Squire, Geoffrey Lin, Xuemin Kloppers, Corne Miller, Richard Intelligent Sensing and Systems Lab. CSIRO Australia Information Engineering Lab. CSIRO Australia University of New South Wales Australia

ISBN: (纸本)9781450320375

A process trace describes the processes taken in a workflow to generate a particular result. Given many process traces, each with a large amount of very low level information, it is a challenge to make process traces meaningful to different users. It is more challenging to compare two complex process traces generated by heterogenous systems and have different levels of granularity. We present CTrace, a system that (1) lets users explore the conceptual abstraction of large process traces with different levels of granularity, and (2) provides semantic comparison among traces in which both the structural and the semantic similarity are considered. The above functions are underpinned by a novel notion of multi-granularity process trace and efficient multi-granularity similarity comparison algorithms. Copyright © 2013 ACM.

关键词： Semantics

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A note on improvement of adaptive observer robustness 19

A note on improvement of adaptive observer robustness

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Efimov, Denis Edwards, Christopher Zolghadri, Ali Non-A Team Inria Lille Parc Scientifique de la Haute Borne 40 Avenue Halley Villeneuve d'Ascq59650 France College of Engineering Mathematics and Physical Sciences University of Exeter ExeterEX4 4QF United Kingdom University of Bordeaux IMS-Lab. Automatic Control Group 351 Cours de la Libération Talence33405 France Department of Control Systems and Informatics National Research University ITMO 49 Kronverkskiy Av. Saint-Petersburg197101 Russia

ISBN: (纸本)9783902823625

In this paper the problem of adaptive observer design in the presence of disturbances is studied, and an augmented adaptive observer is proposed. First, the H∞ gain of a conventional adaptive observer is estimated, which characterizes the effect of disturbances on output errors. Next, it is shown that if the disturbance is "matched" in the plant equations, then it is possible to introduce additional sliding-mode feedback, dependent on the plant output, improving the accuracy of observation. Simulation results confirm the improvement. © IFAC.

关键词： Automation

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Terrain identification on a one-legged hopping robot using high-resolution pressure images

Terrain identification on a one-legged hopping robot using h...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Jacob J. Shill Emmanuel G. Collins Eric Coyle Jonathan Clark Department of Mechanical Engineering Center for Intelligent Systems Control. and Robotics (CISCOR) Tallahassee FL USA Department of Mechanical Engineering Embry-Riddle Aeron University Daytona Beach FL USA Department of Mechanical Engineering Scansorial and Terrestrial Robotics and Integrated Design Lab (STRIDe) Tallahassee FL USA

For efficient and safe locomotion the gaits of legged robots should vary with the type of terrain. Hence, terrain surface classification is an important problem for this class of mobile robots. Prior research has developed approaches to proprioceptive terrain classification for both wheeled and limbed robots that use sensor measurements dependent upon the dynamics of the robot, which ultimately requires the classification system to be trained at a large number of operating conditions (e.g., vehicle speeds and loads). This research develops an approach to terrain identification based on pressure images generated through direct surface contact using a robot skin constructed around a high-resolution pressure sensing array. Terrain signatures for classification are formulated from the magnitude frequency responses of the pressure images. The methodology is used to train and test a classifier using dynamically measured pressure images from a one-legged hopping robot. Experimental tests yield high classification accuracies, which are independent with respect to changing robot dynamics (i.e., different leg gaits). The findings of this paper suggest the methodology can be extended to autonomous field robots, providing the robot with crucial information about the environment that can be used to aid stability over rough terrains and enhance motion planning over varying terrains.

关键词： Robot sensing systems Skin Legged locomotion Vectors Foot Accuracy

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Using Web data to enhance traffic situation awareness

Using Web data to enhance traffic situation awareness

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International Conference on intelligent Transportation

作者： Xiao Wang Ke Zeng Xue-Liang Zhao Fei-Yue Wang Qingdao Academy of Intelligent Industries Chinese Academy of Sciences Beijing Shandong China School of electronic and information engineering Xi'an Jiaotong University Xi'an China The State Key Lab of Management and Control for Complex Systems Institute of Automation Beijing China

ISBN: (纸本)9781479960798

With the ubiquity of mobile communication devices, people experiencing traffic jams share real-time information and interact with each other on social media sites, which provide new channels to monitor, estimate and manage traffic flows. In this paper, we use natural language processing and data mining technologies to extract traffic jam related information from ***, analyze the content of people's talk to discover the “talking point” of people when facing traffic jams, and to provide data support for relevant authorities to make successful and effective decisions for real-time traffic jam response and management.

关键词： Media Transportation Real-time systems Data mining Message systems Monitoring

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An analysis of Beijing HFMD patients mobility pattern during seeking treatment

An analysis of Beijing HFMD patients mobility pattern during...

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2013 International Conference for Smart Health, ICSH 2013

作者： Zhu, Zhaonan Cao, Zhidong Zeng, Daniel Dajun State Key Lab. of Intelligent Control and Management of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China

ISBN: (纸本)9783642398438

Previous epidemiological researches have studied HFMD transmission pattern, but the study on the patients mobility pattern while seeking treatment is absent. In this paper, we present a statistical analysis of the spatialtemporal pattern of the Beijing HFMD patients mobility based on a complete works dataset containing over 40,000 cases in 2010. The main findings are as follows: (1) the patents incline to take their sick children to hospitals on weekdays, especially on Monday;(2) the patients living far from city center are more likely to get to hospitals in the afternoon, while the patients in the downtown in the morning;(3) patients (or their parents) either select the nearby hospitals, or the Class-A hospitals in the downtown. Furthermore, we employ a gravity model to describe the spatial mobility pattern of patients. The experiment results show a good fit. © 2013 Springer-Verlag.

关键词： Hospitals

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Farmland monitoring by sensor networks and airships

Farmland monitoring by sensor networks and airships

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4th IFAC Conference on Modelling and control in Agriculture, Horticulture and Post Harvest Industry, AGRIcontrol 2013

作者： Gerke, Michael Masár, Ivan Borgolte, Ulrich Röhrig, Christof Control Systems Engineering Group FernUniversität in Hagen Germany Intelligent Mobile Systems Lab Dortmund University of Applied Sciences and Arts Germany

ISBN: (纸本)9783902823441

This paper reports on the development of an automatic controlled airship for applications in environmental monitoring with special emphasis on precision farming. This covers direct monitoring from the air, e.g. with cameras;radar;lidar;gas, temperature, and humidity sensors. A new application area presented here is the interaction of ground based sensors with the airship. This allows wireless gathering of data even in large-scale or remote areas. Airships are combining features of planes and rotorcrafts. They allow measurements very close to the scene, they are able to carry even heavier payloads, and they can move very slowly as well as close above ground. As no dynamic force for lifting is necessary, all energy on board can be applied to movement, control electronics and sensor equipment. There are several inherent security features like low velocity, low weight, and a soft hull. In addition, active precautions for safe operation have been implemented. Copyright © 2013 IFAC.

关键词： Remote sensing

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Wearable gait analysis system for ambulatory measurement of kinematics and kinetics

Wearable gait analysis system for ambulatory measurement of ...

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IEEE Sensors

作者： Guangyi Li Tao Liu Linyi Gu Yoshio Inoue Haojie Ning Meimei Han The State Key Laboratory of Fluid Power Transmission and Control Dept. of Mech. Eng. Zhejiang University 310027 Hangzhou China School of Systems Engineering Kochi University of Technology Kochi Japan INSENCO R&D LAB. INC. Tokyo Japan

ISBN: (纸本)9781479901609

A wearable gait analysis system composed of mobile six-axial force plates and multi-axial motion sensors is capable of gait analysis in non-lab.ratory environment. Triaxial ground reaction force (GRF), triaxial joint angle, joint force and joint moment for the three joints of lower limbs were extracted using the measured data. Presently, we have discussed the components of main axis of these experiment results. GRF, joint angle and joint force showed reasonable agreement with the reference system composed of an optical motion analysis system and stationary force plate (average RMSE of 5.5° and correlation coefficient of 0.94). Only the x-axial moments of ankle and hip showed relatively low consistency.

关键词： gait analysis six-axial force plate motion sensor GRF joint angle joint force joint moment

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Data-efficient generalization of robot skills with contextual policy search

Data-efficient generalization of robot skills with contextua...

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27th AAAI Conference on Artificial Intelligence, AAAI 2013

作者： Kupcsik, -Andras Gabor Deisenroth, Marc Peter Peters, Jan Neumann, Gerhard Department of Electrical and Computer Engineering National University of Singapore Singapore Intelligent Autonomous Systems Lab. Technische Unversität Darmstadt Germany

ISBN: (纸本)9781577356158

In robotics, controllers make the robot solve a task within a specific context. The context can describe the objectives of the robot or physical properties of the environment and is always specified before task execution. To generalize the controller to multiple contexts, we follow a hierarchical approach for policy learning: A lower-level policy controls the robot for a given context and an upper-level policy generalizes among contexts. Current approaches for learning such upper-level policies are based on model-free policy search, which require an excessive number of interactions of the robot with its environment. More data-efficient policy search approaches are model based but, thus far, without the capability of learning hierarchical policies. We propose a new model-based policy search approach that can also learn contextual upper-level policies. Our approach is based on learning probabilistic forward models for long-term predictions. Using these predictions, we use information-theoretic insights to improve the upper-level policy. Our method achieves a substantial improvement in learning speed compared to existing methods on simulated and real robotic tasks. Copyright © 2013, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

关键词： Robots

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