Triangle-Impulse-Responses (TIR) are accurately calculated using an inverse Laplace transform algorithm. Frequency dependent transmission line parameters, i.e., R, L, G, and C, are used due to the skin effect and the ...
详细信息
Triangle-Impulse-Responses (TIR) are accurately calculated using an inverse Laplace transform algorithm. Frequency dependent transmission line parameters, i.e., R, L, G, and C, are used due to the skin effect and the frequency dependent electrical properties of the substrate material. The calculated TIR can be further used to carry out time domain simulations for a large number of lossy transmission lines.
With the advance of hardware and software technology, modern phased array radars are now built with commercial off-the-shelf (COTS) components, and it opens up a new era in real-time resource scheduling of digital sig...
详细信息
With the advance of hardware and software technology, modern phased array radars are now built with commercial off-the-shelf (COTS) components, and it opens up a new era in real-time resource scheduling of digital signal processing. This paper targets the essential issues in building a component-oriented signal processor (SP), which is one of the two major modules in modern phased array radars. We propose a simple but effective task allocation policy and a real-time scheduling algorithm to address the design objectives of SPs. We are able to bound the number of processing units needed for a component-oriented SP in the design time, while everything was done empirically in the past. A series of experiments were done to demonstrate the strength of our methodology.
Low dielectric constant F-doped silicon oxide films (SiO:F) can be prepared by adding fluorine source, like as CF4 to the conventional PECVD processes. We could obtain SiO:F films with dielectric constant as low as 2....
Low dielectric constant F-doped silicon oxide films (SiO:F) can be prepared by adding fluorine source, like as CF4 to the conventional PECVD processes. We could obtain SiO:F films with dielectric constant as low as 2.6 from the reaction mixture of SiH4/N2 O/CF4. The structural changes of the oxides were sensitively detected by Raman spectroscopy. The three-fold ring and network structure of the silicon oxides were selectively decreased by adding fluorine into the film. These structural changes contribute to the decrease ionic polarization of the film, but it was not the major factor for the low dielectric constant. The addition of fluorine was very effective to eliminate the Si-OH in the film and the disappearance of the Si-OH was the key factor to obtain low dielectric constant. A kinetic analysis of the process was also performed to investigate the reaction mechanism. We focused on the effect of gas flow rate, i.e. the residence time of the precursors in the reactor, on growth rate and step coverage of SiO:F films. It revealed that there exists two species to form SiO:F films. One is the reactive species which contributes to increase the growth rate and the other one is the less reactive species which contributes to have uniform step coverage. The same approach was made on the PECVD process to produce low-k C:F films from C2F4, and we found ionic species is the main precursor to form C:F films.
When a large Petri net system is implemented, several LSI Petri net controllers are used and connected in order to build a whole system. For this purpose, the authors propose a new Petri net controller, which can hold...
详细信息
When a large Petri net system is implemented, several LSI Petri net controllers are used and connected in order to build a whole system. For this purpose, the authors propose a new Petri net controller, which can hold much more places than the one proposed before. It also has the new control of tokens for kill-arc and shared-places among sub Petri nets are also proposed. Four accessible registers of tokens makes it possible to access four tokens at the same time, so one can use place-numbers instead of bit-patterns of places as used by the previous controller. This reduces the memory to log n/n of the previous. The new control of tokens makes it easy to keep consistency of tokens among a group of sub Petri net controllers. One can implement LSI Petri net controllers for several time larger Petri nets than previous ones and it is as fast as previous controllers.
This paper reports the application of evolutionary computation in the automatic generation of a neural network architecture. It is a usual practice to use trial and error to find a suitable neural network architecture...
详细信息
This paper reports the application of evolutionary computation in the automatic generation of a neural network architecture. It is a usual practice to use trial and error to find a suitable neural network architecture. This is not only time consuming but may not generate an optimal solution for a given problem. The use of evolutionary computation is a step towards automation in architecture generation. In this paper a brief introduction to the field is given as well as an implementation of automatic neural network generation using genetic programming.< >
A ship design methodology is presented for developing hull forms that attain improved performance in both seakeeping and resistance. Contrary to traditional practice, the methodology starts with developing a seakeepin...
A ship design methodology is presented for developing hull forms that attain improved performance in both seakeeping and resistance. Contrary to traditional practice, the methodology starts with developing a seakeeping-optimized hull form without making concessions to other performance considerations, such as resistance. The seakeeping-optimized hull is then modified to improve other performance characteristics without degrading the seakeeping. Presented is a point-design example produced by this methodology. Merits of the methodology and the point design are assessed on the basis of theoretical calculations and model experiments. This methodology is an integral part of the Hull Form Design system (HFDS) being developed for computer-supported naval ship design. The modularized character of HFDS and its application to hull form development are discussed.
作者：
SUTO, YHAYASHI, YMedical Equipment Division
Toshiba Corporation Kawasaki 213 Japanwas born in Japan in July 193 He received M.S. and Ph.D. degrees in administration engineering from Keio University
Yokohama Japan in 197 and 1977
respectively. From 196 to 1978
he was with the Electronic Computer Division Toshiba Corporation Tokyo Japan engaged in the development of computer application software. He is currently with the Medical Equipment Division Toshiba Corporation and is concerned with nuclear medical data processing. Dr. Suto is a member of the Japan Society of Medical Electronics and Biological Engineering the Japan Society of Ergonomics and the Information Processing Society of Japan.YoshioFaculty of Engineering Keio University Yokohama 223 Japan was born in Tokyo
Japan in September 192 He received M.D. and Ph.D. degrees from Keio University
Tokyo Japan in 1960 and 1967 respectively. From 195 to 1965
he was associated with the school of Medicine Keio University. He is currently a Professor in the Department of Administration Engineering Keio University. He has been concerned with human engineering system engineering and bioengineering and is presently engaged in research in the areas of pattern recognition. Dr. Hayashi is a member of the Japan Society of Ergonomics the Operations Research Society of Japan and the Society of Instrument and Control Engineers of Japan.
A pattern recognition system is divided into two parts, a receptor and a categorizer. In this research, a creative receptor is designed, and then an effective pattern recognition system based on the receptor is consti...
详细信息
A pattern recognition system is divided into two parts, a receptor and a categorizer. In this research, a creative receptor is designed, and then an effective pattern recognition system based on the receptor is constituted. The receptor is composed of a set of unique matrix operators which allow it to perform efficient feature measurement extraction. The feature measurements are ranked in effective order, based on another function of the receptor. For the categorizer, a well-known optimization theory is applied. To evaluate the performance of this system, some evaluation functions are defined. Therefore, the receptor mechanism is optimized by the functions. This system is experimentally evaluated by computer simulations.
暂无评论