http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
개별검색 DB통합검색이 안되는 DB는 DB아이콘을 클릭하여 이용하실 수 있습니다.
통계정보 및 조사
예술 / 패션
<해외전자자료 이용권한 안내>
- 이용 대상 : RISS의 모든 해외전자자료는 교수, 강사, 대학(원)생, 연구원, 대학직원에 한하여(로그인 필수) 이용 가능
- 구독대학 소속 이용자: RISS 해외전자자료 통합검색 및 등록된 대학IP 대역 내에서 24시간 무료 이용
- 미구독대학 소속 이용자: RISS 해외전자자료 통합검색을 통한 오후 4시~익일 오전 9시 무료 이용
※ 단, EBSCO ASC/BSC(오후 5시~익일 오전 9시 무료 이용)
In this paper, the MUSIC algorithm is modified when two targets exist closely. It is shown that the signal subspace eigenvector is represented by a proper combination of the direction mode vectors. The proposed algorithm obtains the null spectrum by using the fact that the signal subspace eigenvectors are orthogonal to the noise subspace eigenvectors. The proposed algorithm estimates the DOA's which minimize the proposed null spectrum. The proposed algorithm has similar resolution capability and reduces the computational burden comparedto that of root-MUSIC.
Activated carbons were prepared from agricultural wastes by chemical activation with KOH. The seed of water-melon was used as raw materials. Preparation process involves the roasting of raw material and carbonization of roasted material followed by chemical activation. N₂-BET surface areas and total pore volumes of activated water-melon char prepared by chemical activation were measured as 128∼978㎡/g and 0.002∼0.317㎤/g, respectively. Adsorption of methylene blue in solution by activated carbon was carried out and the adsorbate transmittance of methylene blue was determined UV absorption at 660nm using UV spectrophotometer.
Activated carbon was widely used in industrial application such as purification of gas and water, catalyst, or catalyst support and separation process etc., owing to its highly adsorption capacity. In this paper, activated carbon was produced from water-melon seed, which is an agricultural by product, by chemical activation with ZnCl₂, NaOH and KOH. Preparation process involve the roasting of raw material and carbonization of roasted material followed by chemical activation. N₂-BET specific surface areas of activated water-melon char prepared by chemical activation were measured as 128-978 ㎡/g with 100-300 wt% chemical ratio of ZnCl₂, NaOH and KOH, respectively. Removal of phenol in solution by activated carbon was carried out and structure change of pore surface was observed by SEM.
Activated carbon was produced from grape-seed, which is an agricultural by-product, by chemical activation with NaOH, KOH and ZnCl₂. It was examined the characteristics of activated carbon through BET specific surface area, N₂ adsorption isotherm, pore size distribution, average pore radius, pore volume and SEM photograph. Especially, most important factor of activated carbon produced by chemical activation was a ratio of chemical agent. The N₂-BET specific surface areas of activated grape-seed char prepared by chemical activation were measured as about 44.09 -121.33 ㎡/g with 100-300 wt% chemical ratio of NaOH, KOH and ZnCl₂, respectively. Removal of chromium in solution by activated carbon was carried out.
Korean grape-seed that is one of the agricultural wastes was used as a raw material to prepare activated carbon through roasting, carbonization and chemical activation processes. NaOH was used as activation reagent. It was examined the chracteristics of activated carbon through BET specific surface area, pore size distribution, average pore radius, pore volume and SEM photograph. The mixing of the ratio of the grape-seed and activation reagent was varied to 100 ~ 300 weight percent. The surface areas of the activated carbon manufactured from the grape-seed were 47.9- 121.3 ㎡/g. Adsorption of n-Hexane gas by our activated carbon under gas phase was carried out and structural change of pore surface was observed by SEM.