DARIS (Distributed Aperture Array for Radio Astronomy in Space) is a radio astronomy space mission concept aimed at observing the low-frequency radio sky in the range 1-10 MHz. Because of the Earth's ionospheric d...
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In school education there are many kinds of learning styles, and it is known that group learning (collaborative learning) is more effective than individual learning. In collaborative learning it is very important how ...
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We consider a tuning problem for a class of feedforward controllers for a given closed-loop system with an unknown plant by only using of the input and output measurements. The feedforward controllers which should be ...
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In this paper, we consider a decentralized control problem for suppressing the traffic jam phenomenon in traffic flow. To analyze the phenomenon, we use the so-called optimal velocity model. In the model, the optimal ...
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The electric power is indispensable and its stable supply is always expected. A stable supply needs the real-time observation of load conditions by measurement of power factor. In addition, the various faults have bee...
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We successfully realized phase‐locking of a 2.7‐THz metal‐metal waveguide quantum cascade laser (QCL) to a reference, which is generated from an external microwave signal by applying two stages of frequency multipl...
We successfully realized phase‐locking of a 2.7‐THz metal‐metal waveguide quantum cascade laser (QCL) to a reference, which is generated from an external microwave signal by applying two stages of frequency multiplication. The reference is the 15th harmonic of a signal at 182 GHz, which is produced by a semiconductor superlattice nonlinear device. The signal at 182 GHz is generated by a multiplier‐chain (×12) from a microwave synthesizer at ∼15 GHz. Both QCL laser and reference radiations are coupled into a superconducting NbN hot electron bolometer mixer, resulting in a beat signal, which is fed into a phase‐lock loop. Spectral analysis of the beat signal confirms that the QCL is phase locked. This result is a crucial demonstration for a QCL used for local oscillator and opens the possibility to extend heterodyne interferometers into the far‐infrared range.
After the successful implementation of the dual and quad core processors, the designers are now thinking to place hundreds or even thousand of cores on a single chip. But this practice may lead to many basic and funda...
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ISBN:
(纸本)9781605586427
After the successful implementation of the dual and quad core processors, the designers are now thinking to place hundreds or even thousand of cores on a single chip. But this practice may lead to many basic and fundamental restrictions like interconnection of cores, memory size and its access patterns, cache design, number of cache levels etc. To overcome the cache related problems for many core processors two new multi-level cache models, LogN and LogN+1, have been proposed. These models are based on binary tree data structure. In this paper two design approaches for defining multi-level cache hierarchy for these two models are discussed. These two approaches are based on use of arithmetic and geometric propagation. After analyzing both these approaches for both LogN and LogN+1 model, the geometric propagation approach found much better for defining cache hierarchy in terms of size, frequency and cost. Also, cache access time for a core in a cache hierarchy designed using geometric propagation found much lesser than a cache hierarchy designed using arithmetic propagation. Copyright 2009 ACM.
In this paper, we consider a reduction problem of vibration in riding and rider's burden by stabilizing the bicycle at slow speed. In riding a bicycle, the reference input which is generally required by feedback m...
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In the modern day, MPEG-4 image compression technique have been commonly applied in various indoor wireless communication systems. The efficient system design mostly relies on the joint source channel coding algorithm...
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This paper presents the HTTP request global distribution using the fuzzy-neural decision making mechanism. Two efficient algorithms GARDiB and GARDiB2 are proposed to support HTTP request routing to the Websites. The ...
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