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임베디드 시스템을 위한 저비용 SIMD MAC/MAS 블록 설계
이용주,정진우,이웅석,Lee Yong Joo,Jung Jin Woo,Lee Yong Surk 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.10C
본 논문에서는 실생활에 많이 사용되는 멀티미디어의 연산에 꼭 필요한 명령어를 수행할 수 있는 저면적의 저전력 SIMD MAC/MAS(Single Instruction Multiple Data Multiply and ACcumulate/Multiply And Subtract)를 개발하였다. 개발의 목적이 이전에 개발된 64-bit의 고면적, 고성능 MAC/MAS를 저면적, 저비용화하면서 성능 저하를 최소화 하는 것이었기 때문에 이전에 개발된 구조와 비교함으로써 이번 연구의 성과를 판단하였다. 본 논문의 내용은 크게 SIMD MAC의 설계에 대한 내용, 본 설계가 이전의 설계와의 차별성, 그리고 합성 결과 및 결론으로 이루어져 있다. 설계 결과, 이전에 설계되었던 고성능의 64비트 SIMD MAC/班AS에 비해 전체적인 하드웨어의 크기는 32%로 축소되었다. 이는 임베디드 DS(Digital Signal Processor)에 적합하도록 ISA(Instruction Set Architecture)를 개선하였고, 내부 데이터의 대역폭을 32비트로 줄였으며 하드웨어를 보다 최적화하여 설계하였기 때문으로 판단된다. In this paper, we developed a low-area and low-cost SIMD MAC/MAS(Single Instruction Multiple Data Multiply and ACcumulate/Multiply And Subtract) for multimedia that is used much in real life. We compared the result of this research with a previously developed more large and high performance SIMD MAC/MAS. This paper is consist of 5 parts, which are an introduction, the contents of designing SIMD MAC/MAS hardware, a special qualities for previous works, the result of synthesis and conclusion. The design result reduced by size 32% of whole hardware than 64 bit SIMD MAC/MAS block of designed for high performance. This improved ISA (Instruction Set Architecture) to be suitable to embedded DSP(Digital Signal Processor), and shortened bit range of 64-bit data to 32-bit and implement more optimally.
調胃升淸탕이 Alzheimer's disease 모델 白鼠의 학습과 기억에 미치는 影響
黃義完,박순권,李雄錫,김현택 慶熙大學校韓醫科大學韓醫學硏究所 1998 慶熙韓醫大論文集 Vol.21 No.1
The effects of Jowiseungchungtang on the enhancement of learning and memory of AD model rats were studied with Morris water maze and radial arm maze. Sample group was electrolytically lesioned on nbM, and then daily treated with the medicine for two months. Control group with nbM lesion, and sham group with the sham operation were treated the vehicle for same duration. The following results were observed. 1. As the learning trials of Morris water maze processed repeatedly, sham group achieved 200.21±35.28 seconds in 1st trial, 153.14±62.66 seconds in 2nd, 109.93±42.57 seconds in 3rd, 79.29±50.07 seconds in 4th, and 48.07±29.39 seconds in 5th. The control group achieved 224.85±26.94 in 1st trial, 191.77±67.97 seconds in 2nd, 178.46±65.06 seconds in 3rd, 137.46±76.32 seconds in 4th, and 108.92±90.12 seconds in 5th. The sample group achieved 202.00±33.53 seconds in 1st trial, 196.17±40.65 seconds in 2nd, 172.50±56.30 seconds in 3rd, 88.75±47.70 seconds in 4th, and 84.17±59.73 seconds in 5th. Therefore, these data shows that all three groups were improved in learning capacity as trials were repeated, but the sample group showed more prominent improvement in learning compared with the control group(p<0.05). 2. In memory retention test of Morris water maze that counts the staying time in the target area, sham group stayed for 15.36±5.39 seconds, the control group stayed for 5.54±5.64 seconds, and the sample group stayed for 10.08±5.45 seconds. The analysis of the memory retention data shows that the sample group marked more significant improvement statistically in memory retention compared with the control group(p<0.05). 3. In the learning of radial arm maze, the number and rate of animals that arrive the learning criteria amounted 9 out of 14, 64.29% in sham group, none out of 13.0% in the control group, and 3 out of 12, 25.00% in the sample group. So, the sample group shows better learning capacity significantly compared with the control group(p<0.05). With the experimental results above, Jowiseungchungtang can be supposed to have the improving effects on the learning and memory of AD rats induced by eletronical injury of nbM.