http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
탄소섬유 혼입 5%에 따른 SIFRCC의 전자파 차폐성능
장태진(Jang, Taejin),김기현(Kim, Gihyun),정해국(Jung, Haekook),김승원(Kim, Seungwon),박철우(Park, Cheolwoo) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
이 연구는 전자파 차폐 성능을 확보를 위한 연구의 일환으로, 슬러리 충전 강섬유보강 시멘트 복합체(slurry infiltrated fiber reinforced cementitious composite, SIFRCC)의 전자파 차폐 성능 향상을 목적으로 탄소섬유 혼입에 따른 전자파 차폐 성능을 분석하였다. 실험결과 탄소섬유 혼입 5%의 전자파 차폐 성능은 1GHz 기준 69dB 수준으로 탄소섬유 혼입하지 않은 SIFRCC 보다 19dB 증가하는 것으로 분석되었다. This study analyzed the electromagnetic shielding performance of slurry infiltrated fiber reinforced cementitious composite (SIFRCC) with mixed milled carbon fiber. It was analyzed that the electromagnetic wave shielding performance of SIFRCC without milled carbon fiber was 69dB at 1GH and that the shielding performance was increased by 19dB with 5% addition of milled carbon fibers.
A Spatial Audio System Using Multiple Microphones on a Rigid Sphere
Taejin Lee,강경옥,김진웅,정대권,Daeyoung Jang,Hareo Hamada 한국전자통신연구원 2005 ETRI Journal Vol.27 No.2
The main purpose of a spatial audio system is to give a listener the same impression as if he/she were present in a recorded environment. A dummy head microphone is generally used for such purposes. Because of its humanlike shape, we can obtain good spatial sound images. However, its shape is a restriction on its public use and it is difficult to convert a 2-channel recording into multichannel signals for an efficient rendering over a multispeaker arrangement. In order to solve the problems mentioned above, a spatial audio system is proposed that uses multiple microphones on a rigid sphere. The system has five microphones placed on special points of the rigid sphere, and it generates audio signals for headphone, stereo, stereo dipole, 4-channel, and 5-channel reproduction environments. Subjective localization experiments show that front/back confusion, which is a common limitation of spatial audio systems using the dummy head microphone, can be reduced dramatically in 4-channel and 5-channel reproduction environments and can be reduced slightly in a headphone reproduction