the popularity of smartphones is growing every day. the hardware components of the mobile devices are renewed almost every six months. however the smartphones still cannot stay awake for more than one day. this is one...
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the popularity of smartphones is growing every day. the hardware components of the mobile devices are renewed almost every six months. however the smartphones still cannot stay awake for more than one day. this is one of the biggest problem today both in the mobile industry and among users as well. the engineers try to reduce the energy usage not just through hardware optimization but also software solutions are made. these solutions are mostly unsuitable for everyday usage, but what happens if we optimize the energy consumption based on the most frequent user habits? the users usually use their devices to be continuously notified about the latest messages, activities, phone calls etc. this behavior can be sometimes unnecessary, for example during the night it is not important to synchronize all e-mails of the users. From that point of view, the users and their devices can form a socio-cognitive channel, which can help to create behavior-based technologies. In this paper we introduce a model which represents the most common smartphone usage scenarios using Markov chains. Based on this model we make suggestions how the processes can be modified to improve the energy consumption of the mobile devices.
the proceedings contain 104 papers. the topics discussed include: genetic-algorithm seeding of idiotypic networks for mobile-robot navigation;diagnosis of discrete event systems with Petri Nets and coding theory;peopl...
ISBN:
(纸本)9789898111319
the proceedings contain 104 papers. the topics discussed include: genetic-algorithm seeding of idiotypic networks for mobile-robot navigation;diagnosis of discrete event systems with Petri Nets and coding theory;people tracking using laser range scanners and vision;parameter tuning of routing protocols to improve the performance of mobile robot teleoperation via wireless ad-hoc networks;altitude control of small helicopters using a prototype test-bed;a new approach of gray images binarization for artificial vision systems withthreshold methods;active security system for an industrial robot based on artificial vision and fuzzy logic principles;contribution concerning robot accuracy using numerical modeling;driver's drowsiness detection based on visual information;calibration aspects of multiple line-scan vision system application for planar objects inspection;and robot localization based on visual landmarks.
In this study, we propose to evaluate a 7 DOF exoskeleton in terms of motion control. Using criteria from the human motor control literature, inverse optimization was performed to assess an industrial screwing movemen...
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In this study, we propose to evaluate a 7 DOF exoskeleton in terms of motion control. Using criteria from the human motor control literature, inverse optimization was performed to assess an industrial screwing movement. the results of our study show that the hybrid composition of the free arm movement was accurately determined. At contrary, when wearing the exoskeleton, which produces an arbitrary determined torque compensation, the motion is different from the naturally adopted one. this study is part of the evaluation and comprehension of the complex neuromuscular mechanism resulting in wearing an exoskeleton several hours per day for industrial tasks assistance.
Minimum variance distortionless response(MVDR) beamformer is a better target detection method, which provided high-resolution and anti-interference abilities. But the nice features will be degraded significantly for a...
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Minimum variance distortionless response(MVDR) beamformer is a better target detection method, which provided high-resolution and anti-interference abilities. But the nice features will be degraded significantly for a fast bearing-rate target. Because the eigenvalue of longtime integral correlation matrix will spread, the signal and interference are no longer clearly identified by the eigenvectors. A beam domain MVDR and motion compensation arithmetic is given in this paper. the motion effect can be compensated by tracking the signal bearing change using real time estimated beam domain covariance matrix. the detection ability of moving target can be improved.
In the recent years, mobile cloud computing became a vivid topic. On the one hand, the resources of cell phones are rapidly growing, which allow them to solve more and more computationally demanding tasks. On the othe...
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In the recent years, mobile cloud computing became a vivid topic. On the one hand, the resources of cell phones are rapidly growing, which allow them to solve more and more computationally demanding tasks. On the other hand, cell phones are indeed portable: basically, we can assume that all human beings will be equipped by one. thus, a scenario aiming to organize these devices into a local supercomputer to further improve computational performance is completely realistic. this paper aims to introduce a framework, which is able to control and schedule distributed processing by cell phones and tablets to solve complex tasks, when an Internet connection is not available. the communication protocol is based on Extensible Messaging and Presence Protocol (XMPP) to take advantage of its platform independence. We investigate whether XMPP is suitable for such mobile applications, and show how our general framework can form a basis to solve specific tasks by a distributed cell phone network. We introduce some measures based on the available resources of the individual devices which let the scheduler to assign the subtasks accordingly. For demonstration, we consider medical image analysis problems, where retinal/dermatoscopy images acquired by mobile phones are processed by a local mobile network.
One of the major driving forces behind technology development is the establishment of equality among everyone. It is intended that the strategic use of technology complements competencies or diminished capacities, imp...
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ISBN:
(纸本)9781479952007
One of the major driving forces behind technology development is the establishment of equality among everyone. It is intended that the strategic use of technology complements competencies or diminished capacities, improving self confidence and autonomy. Blind and partially sighted people often deal withthis inequality in the performance of tasks or daily activities. the presented work reviews some of the proposed technologies to assist visually impaired people in common activities, specifically navigation and going shopping.
this paper considers the problem of eigenstructure assignment for output feedback control. We introduce a new method for partial eigenstructure assignment, which allows to place the eigenelements (λi,v i,wi) simultan...
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ISBN:
(纸本)9789898565709
this paper considers the problem of eigenstructure assignment for output feedback control. We introduce a new method for partial eigenstructure assignment, which allows to place the eigenelements (λi,v i,wi) simultaneously. this is possible by a combination of linear algebra and nonlinear optimization techniques. the advantage of the new approach is illustrated through the control of a launcher in atmospheric flight.
A three dimensional localisation algorithm for a swarm of underwater vehicles is presented. the proposed approach is grounded on an extended Kalman filter (EKF) scheme used to fuse some proprioceptive data such as the...
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ISBN:
(纸本)9789898565716
A three dimensional localisation algorithm for a swarm of underwater vehicles is presented. the proposed approach is grounded on an extended Kalman filter (EKF) scheme used to fuse some proprioceptive data such as the vessel's speed and some esteroceptive measurement such as the time of flight (TOF) sonar distance of the companion vessels. the results of several simulations are presented. Some considerations about the available underwater bandwidth and the communication needed by the approach are discussed.
this paper relates to the problem of a path following task for a wheeled mobile platform of (2,0) type. Two kinematic control algorithms, Micaelli-Samson algorithm and Soetanto-Lapierre-Pascoal algorithm, which are ba...
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ISBN:
(纸本)9789898565716
this paper relates to the problem of a path following task for a wheeled mobile platform of (2,0) type. Two kinematic control algorithms, Micaelli-Samson algorithm and Soetanto-Lapierre-Pascoal algorithm, which are based on either the Serret-Frenet frame with an orthogonal projection or the Serret-Frenet frame with a nonorthogonal projection of a robot on the desired path, were presented. the additional condition that should be imposed on the function δ, which is a parameter depending on a linear velocity of the robot and on a distance error, was described. the influence of the function δ on the convergence of the non-singular algorithm has been shown using computer simulations.
Simulation frameworks are wide-spread in the range of robotics to test algorithms and analyze system behavior beforehand - which tremendously reduces effort and time needed for conducting experiments on the real machi...
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ISBN:
(纸本)9789898565716
Simulation frameworks are wide-spread in the range of robotics to test algorithms and analyze system behavior beforehand - which tremendously reduces effort and time needed for conducting experiments on the real machines. this paper addresses a component based framework for simulating a wall-climbing robot that uses negative pressure adhesion in combination with an omnidirectional drive system. Key aspect is the adhesion system which interacts withthe environmental features such as surface characteristics (e. g. roughness) or defects. An elaborate thermodynamic model provides the basis for a realistic simulation of the airflow between the virtual environment and the vacuum chambers of the robot. these features facilitate the validation of closed-loop controllers and control algorithms offline and in realtime.
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