Shape Memory Alloys SMA attracts more and more interest and nowadays many research centersare working on developing more accurate and applicable actuators. A tangible effect of using SMAmat...
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Shape Memory Alloys SMA attracts more and more interest and nowadays many research centers
are working on developing more accurate and applicable actuators. A tangible effect of using SMA
materials is considerable simplification of the constructions used so far, which entails obvious
economic benefits. Along with the increase in the volume of production and decrease in the cost of
production, SMA materials become increasingly available on the consumer market.
In the article the use of SMA wire to build and control linear position actuators was presented.
The SMA actuator is characterized by one of the highest in technology weight ratios, which
describes the ratio of maximum external load to its own weight. It allows for building miniature
devices which are extremely efficient. Generally SMA wires are applied as on-off objects. After
initial research and building several prototypes the gear transmission was chosen. It was decided to
realize an actuator which can work in both directions of displacement, and so allow for the
elimination of a return spring, which is a unique solution.
In this paper, a new infrared-based face identification system based on an input image decomposition is presented. The proposed image decomposition is a novel approach to transform an infrared image into a multilayer ...
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Automation and higher level of control systems development cause that function of human in Man-Machine System (M-MS) is frequently moves to the function of supervisor. Observed evolution of M-MS systems accompanies de...
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Results of an experimental research on the influence of several factors on the fatigue behaviour of simple riveted lap joint specimens under constant amplitude loading conditions are presented. The variables considere...
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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,...
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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.
High energy impulse sound events are characterised by ultra high pressure and low frequencies. Lower frequency sounds are generally less attenuated over a given distance in the atmosphere than higher frequencies. Thus...
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ISBN:
(纸本)9781615677368
High energy impulse sound events are characterised by ultra high pressure and low frequencies. Lower frequency sounds are generally less attenuated over a given distance in the atmosphere than higher frequencies. Thus, it follows that impulse sounds can be heard over greater distances and will be strongly affected by environmental influences. For calculating a long-term average immission level it is necessary to apply weighting factors as a probability of occurrence of each weather condition during the relevant time period. It means, that during impulse noise measurement at long distance it is necessary to follow environmental parameters in many points along the way of sound travels and on the other hand, to have a database of sound transfer functions in the long-term. The paper deals with some real word data of partial uncertainties of noise prediction and measurement from high energy impulse sound sources, taken in different meteorological conditions. Main attention has been focused on the influence of environmental conditions on the way of sound travels.
Shape Memory Alloys SMA attracts more and more interest and nowadays many research centers are working on developing more accurate and applicable actuators. A tangible effect of using SMA materials is considerable sim...
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A complete nonlinear finite element model for coupled-domain microelectromechanical system devices with electrostatic actuation and squeeze film effect was developed. for this purpose, a corotational finite element fo...
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Problem of scheduling n preemptive jobs on a single processor is studied, in which for each job a distinct due window is given in advance. If a job is completed within its due window, then it incurs no penalty. Otherw...
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ISBN:
(纸本)9783902661555
Problem of scheduling n preemptive jobs on a single processor is studied, in which for each job a distinct due window is given in advance. If a job is completed within its due window, then it incurs no penalty. Otherwise, it incurs a job-independent earliness or tardiness cost. The objective is to find a job schedule such that a maximum of weighted costs associated with earliness and tardiness is minimized. Properties of optimal solutions of this problem are established and an algorithm based on them is presented. It is proved that the analysed problem is solvable in O(n2) time.
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