This paper explores the forming-up, robustness of the ensuing formation and coordinated movement of autonomous, non-communicating submerged vehicles (AUV) planning their trajectories using a virtual potential fields m...
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Simultaneously imposed challenges of highvoltage insulation,high dv/dt,highswitching frequency,fast protection,and thermal management associated with the adoption of 10 kV SiC MOSFET,often pose nearly insurmountable b...
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Simultaneously imposed challenges of highvoltage insulation,high dv/dt,highswitching frequency,fast protection,and thermal management associated with the adoption of 10 kV SiC MOSFET,often pose nearly insurmountable barriers to potential users,undoubtedly hindering their penetration in mediumvoltage(MV)power *** novel technologies such as enhanced gatedriver,auxiliary power supply network,PCB planar dcbus,and highdensity inductor are presented,enabling the SiCbased designs in modular MV converters,overcoming aforementioned ***,purely substituting SiC design instead of Sibased ones in modular MV converters,would expectedly yield only limited ***,to further elevate SiCbased designs,novel highbandwidth control strategies such as switchingcycle control(SCC)and integrated capacitorblocked transistor(ICBT),as well as highperformance/highbandwidth communication network are *** these technologies combined,overcome barriers posed by stateoftheart Si designs and unlock system level benefits such as very high power density,highefficiency,fast dynamic response,unrestricted line frequency operation,and improved power quality,all demonstrated throughout this paper.
Growth of highly doped p-type InGaAs is required for low contact resistivity demanded by high performance microwave devices. Increasing the doping level in the base of HBTs is known to be reflected in better unity pow...
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Growth of highly doped p-type InGaAs is required for low contact resistivity demanded by high performance microwave devices. Increasing the doping level in the base of HBTs is known to be reflected in better unity power gain cut-off frequency. Low temperature growth has been shown to significantly enhance the maximum doping levels obtainable in carbon-doped bases of Npn transistors [C.J. Palmstrom ct al., Appl. Phys. Lett. 64 (1994) 3139]. However, low temperature growth of Be-doped InGaAs has been reported to significantly degrade surface morphology of CBE grown material [T.K. Uchida et al., J. Appl. Phys. 29 (1990) L2146]. In this study the opposite effect was found. As the growth temperature was lowered, the surface morphology improved. Go-optimized normal growth temperature of InP and InGaAs has been previously determined to be 525 degrees C while the low temperature is approximately 460 degrees C. Growth was performed using a Varian Gen II CBE reactor using triethylgallium, trimethylindium. 100% phosphine and 100% arsine as source materials. Elemental Si and Be were used as n- and p-type dopants. A factor of 2 improvement in the doping level was seen with a maximum level of 6 x 10(19) cm(-3) measured by the Van der Pauw-Hall technique, A marked improvement in the surface morphology and X-ray spectra accompanies this reduction in temperature from a rough surface at normal temperature to specular at low temperature. SHBTs have been grown using both low temperature base structures and normal temperature base structures. The contact resistivity for the base improves by an order of magnitude (to 4 x 10(-6) Omega . cm(2)) and the sheet resistance improves by a factor of 6 (to 324 Omega/rectangle). DC current gains of 25, a common emitter breakdown of 6 V and a common base breakdown of 9 V are obtained. The unity current cut-off frequency for these heavily doped structures is above 90 GHz for a 4 x 4 mu m emitter geometry and the unity power gain cut-off frequency imp
A microcontroller based device was developed to measure wind speed and direction, to calculate their averages and the wind speed's standard deviation and store them in EEPROM, keeping also the corresponding time a...
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This paper describes MTSim, an extensible, customizable simulation platform for the Modechart toolset (MT) [3]. MTSim provides support for ''plugging in'' user-defined viewers useful in, simulating sys...
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ISBN:
(纸本)0818680164
This paper describes MTSim, an extensible, customizable simulation platform for the Modechart toolset (MT) [3]. MTSim provides support for ''plugging in'' user-defined viewers useful in, simulating system behavior in different ways, including application-specific ways. MTSim also supports full user participation an the generation of simulations by allowing users to inject events into the execution trace. Moreover, MTSim provides monitoring and assertion checking of execution traces and the invocation of user-specified handlers upon assertion violation. This paper also introduces a MTSim component called WebSim, a suite of simulation tools for MT, and an an application-specific component of MTSim, which displays the cock-pit of an F-18 aircraft and models its bomb release function.
We describe and evaluate a Hierarchical Sparse Matrix (HiSM) storage format designed to be a unified format for sparse matrix applications on vector processors. The advantages that the format offers are low storage re...
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Biological processes in any living organism are based on selective interactions be tween particular biomolecules. In most cases, these interactions involve and are driven by proteins, which are the main conducto...
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ISBN:
(数字)9783034874755
ISBN:
(纸本)9783034874779
Biological processes in any living organism are based on selective interactions be tween particular biomolecules. In most cases, these interactions involve and are driven by proteins, which are the main conductors of any life process within the organism. The physical nature of these interactions is still not well known. This book presents an entirely new approach to analysis of biomolecular in teractions, in particular protein-protein and protein-DNA interactions, based on the assumption that these interactions are electromagnetic in nature. This new ap proach is the basis of the Resonant Recognition Model (RRM), which was devel oped over the last 15 years. Certain periodicities within the distribution of energies of delocalised electrons along a protein molecule are crucial to the protein's biological function, i.e. inter action with its target. If protein conductivity were introduced, then charges mov ing through the protein backbone might produce electromagnetic irradiation or ab sorption with spectral characteristics corresponding to energy distribution along the protein. The RRM is capable of calculating these spectral characteristics, which we hypothesized would be in the range of the infrared and visible light. These characteristics were confirmed with frequency characteristics obtained ex perimentally for certain light-induced biological processes.
This paper studies consensus control for multi-input/multi-output(MIMO)discrete-time multi-agent systems(MASs).It makes use of the novel idea of resource allocation in designing both the communication graph and feedba...
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This paper studies consensus control for multi-input/multi-output(MIMO)discrete-time multi-agent systems(MASs).It makes use of the novel idea of resource allocation in designing both the communication graph and feedback *** weakest consensusability condition is obtained for MASs over both directed and undirected graphs,which extends the existing results to MIMO discrete-time *** synthesis procedures are also *** work demonstrates the importance of the graph and controller co-design based on resource allocation for MIMO discrete-time MASs.
Communication-intensive parallel applications spend a significant amount of their total execution time exchanging data between processes, which leads to poor performance in many cases. In this paper, we investigate me...
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