http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A New Model of a Routing and Wavelength Assignment Problem on WDM Ring Networks
강동한,강장하,박성수 한국경영과학회 2002 한국경영과학회 학술대회논문집 Vol.- No.1(1)
We consider a routing and wavelength assignment (RWA) problem on wavelength division multiplexing (WDM) ring networks, which is to maximize the established connections between nodes, given a set of usable wavelengths. We propose two new mathematical formulations of it and efficient algorithms based on branch-and-price method. Computational experiments on random instances show that one of the proposed formulations yields optimal solutions in much shorter time on the average than the previous formulation due to Lee (1998).
소리의 공간 제어를 위한 구형 다채널 스피커 어레이 설계
강동수,최정우,이정민,김양한,Kang, Dong-Soo,Choi, Jung-Woo,Lee, Jung-Min,Kim, Yang-Hann 한국음향학회 2012 韓國音響學會誌 Vol.31 No.4
The objective of this paper is to design multichannel spherical loudspeaker array by considering various positioning methods such as Gaussian grid, Lebedev grid and packing method. For the spatial sound manipulation, which is to make desired sound field by controling multiple sound sources, the Kirchhoff-Helmholtz integral states that sound fields can be reproduced in terms of infinite control sources on the integral surface. But since we cannot control infinite number of sources for the implementation, we have to allocate finite number of sound sources which can approximately act as infinite number of sources. To manipulate sound field inside of a sphere (which is typical example of three dimensional array) by controlling sound sources on the surface, three methods of allocating sound sources, which are Gaussian grid, Lebedev grid and packing method, are reviewed. For each geometry, the performances of manipulation rendered by time-reversal operator and higher-order ambisonics are compared. The objective of this paper is to design multichannel spherical loudspeaker array by considering various positioning methods such as Gaussian grid, Lebedev grid and packing method. For the spatial sound manipulation, which is to make desired sound field by controling multiple sound sources, the Kirchhoff- Helmholtz integral states that sound fields can be reproduced in terms of infinite control sources on the integral surface. But since we cannot control infinite number of sources for the implementation, we have to allocate finite number of sound sources which can approximately act as infinite number of sources. To manipulate sound field inside of a sphere (which is typical example of three dimensional array) by controlling sound sources on the surface, three methods of allocating sound sources, which are Gaussian grid, Lebedev grid and packing method, are reviewed. For each geometry, the performances of manipulation rendered by time-reversal operator and higher-order ambisonics are compared.