http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
DSP프로세서를 이용한 홍채영상인식 시스템구현에 관한 연구
김자환,정은숙,성경,류광렬,Kim, Ja-Hwan,Jung, Eun-Suk,Sung, Kyeong,Ryu, Kwang-Ryol 한국정보통신학회 2004 한국정보통신학회논문지 Vol.8 No.4
본 논문은 홍채영상 인식시스템의 처리 속도를 향상시키기 위하여 고성능 DSP 프로세서를 이용한 실시간 처리 시스템의 구현에 관한 연구이다. 시스템은 CCD 카메라, DSP 처리부, 네트워크와 연동을 위해 통신부로 구성된다. 시스템 구현 결과 홍채 영상의 인식 처리 속도가 0.9초 이하 정도 개선되었다. The iris image recognition system realization using DSP processor for the faster real-time processing is presented in this paper. The system is composed of CCD camera, DSP processing and network part to link the communication. The system based on high speed DSP processor leads the iris recognition processing time to be faster. The simulation results in 0.9sec below approximately.
IoT Sensor를 이용한 Line Balancing 실시간 모니터링 시스템
김자환,김도연,임창혁,이성군,박재일 대한산업공학회 2015 대한산업공학회 춘계학술대회논문집 Vol.2015 No.4
Usually methods such as VCR recording and stopwatch method was used in order to measure line balancing of the process. In this research, real-time line balancing monitoring system using IoT technology and sensors will be proposed. The research will be based on manufacturing line consisted of five process, and the measurement will first done by VCR recording method. Further on, the research deals with requiring equipment, data to collect and the whole process of the proposal. Moreover, there will be given the comparing of automatic and by-hand process to give pros and cons of the each.
IoT Sensor를 이용한 Line Balancing 실시간 모니터링 시스템
김자환,김도연,임창혁,이성군,박재일 한국경영과학회 2015 한국경영과학회 학술대회논문집 Vol.2015 No.4
Usually methods such as VCR recording and stopwatch method was used in order to measure line balancing of the process. In this research, real-time line balancing monitoring system using IoT technology and sensors will be proposed. The research will be based on manufacturing line consisted of five process, and the measurement will first done by VCR recording method. Further on, the research deals with requiring equipment, data to collect and the whole process of the proposal. Moreover, there will be given the comparing of automatic and by-hand process to give pros and cons of the each.
갑상선 기능항진 및 기능저하 상태에 있는 흰쥐의 ¹³¹I 분포상황 및 혈장단백질 분석
金慈煥,崔德瓊 고려대학교 의과대학 1972 고려대 의대 잡지 Vol.9 No.2
Distribution of ¹³¹I between tissue and serum(T/S ratio), protein bound iodine and serum(PBI/S) were observed in 38 rats in which the function of thyroid gland was made hyperfunctional or hypofunctional. Hyperthyroid condition was made in 11 rats by the administration of thyroxine (1.7㎎/㎏/day) for over 21 days, in 12 rats hypothyroid state was made by feeding a chow containing 0.1% of propylthiouracil (PTU) for over 21 days. T/S ratio, PBI/S ratio of ¹³¹I were observed after 10, 20, 40, 80 and 120 minutes of peritoneal injection of 30 μC Na¹³¹I. Fractionation of plasma protein, relationship between the function of thyroid and body weight change, and ratio of thyroid weight and body weight were observed. The following results were obtained. 1. T/S ratio of ¹³¹I in normal rats (15 cases) was between 4.55 and 6.08, between 23.23 and 30.85 in thyroxine administered rats (11 cases), and between 7.18 and 14.34 in PTU administered rats. The variation of T/S ratio in time sequence was unremarkable. 2. PBI/S ratio of ¹³¹I was lowest in thyroxine administered rats, namely, it ranged between 7.36 and 9.74. In normal and PTU administered rats, the ratio was between 33.89 and 48.51, and between 32.51 and 42.01, respectively. 3. In plasma protein of thyroxine administered rats β-globulin increased and γ-globulin decreased. In plasma protein of PTU administered rats there were increases in α₁ and γ-globulin. A/G ratio were 1.29 in normal rats, 1.22 in thyroxine administered rats and 1.10 in PTU administered rats, respectively. 4. Percent increase in body weight after 21 days of administration of thyroxine or feeding of PTU was smallest in the PTU administered rats, namely, 18.1%. Percent increase in body weight in normal rats was 26.0% and 22.1% in thyroxine administered rats. 5. The ratio of thyroid weight to body weight was highest in the PTU administered rats, namely, 0.22%. The ratio in normal rats was 0.19% and 0.20% in thyroxine administered rats.
김자환,류광렬 목원대학교 멀티미디어신기술연구소 2001 멀티미디어신기술연구소논문집 Vol.1 No.1
This paper is the Realization of digital power measurement system for the IMT-2000 to acquire powers to Tx and Rx channels, and channel characteristics that obtain power spectral, VSWR, and receiving sensitivity, and is digital system to transmit these values to parent station over the traffic and control linking path. This digital system to transmit these values to parent station over the traffic and control linking path. This digital system is made by the high performance DSP processor and interface processor to enhance the operation and maintenance monitoring performance with keeping Tx/Rx power varying tolerance ±0.5dB less.
광대역 CDMA에 대한 코드 도메인 분석 시스템 구현에 관한 연구
김자환,류광렬 목원대학교 멀티미디어신기술연구소 2002 멀티미디어신기술연구소논문집 Vol.2 No.1
본 논문은 광대역 CDMA 무선 채널의 특성 중 코드 도메인을 분석을 하기 위한 시스템구현이다. 시스템 구성은 크게 RF부와 FPGA부, DSP부로 구성이 된다. FPGA는 RF부를 통한 신호를 I/Q분리 및 스크램블잉 코드를 계산한다. DSP는 스크램블잉 코드에 의한 역 확산된 신호는 OVSF코드를 이용하여 코드 영역의 전력을 계산을 한다. 실험 및 성능 테스트로는 광대역 CDMA발생기에 의한 실험 결과 코드 도메인 전력측정 정확도가 ±1㏈ 이내의 분석이 가능하였다. The realization for code domain analyzing system on Wideband-CDMA(Code Division Multiple Access) is presented. This system is realized with the RF, FPGA and DSP processor. The FPGA firgures out the scambling code, and DSP produces the power of code domain using OVSF. The experiment results allow the code domain power accuracy to keep ±1㏈ low. This system leads to split the text, sound and image signal.
인물 및 지문 대조에 강한 영상 압축의 웨이브릿 선정에 관한 연구
김자환,류광렬 牧園大學校 1998 論文集 - 牧園大學校 Vol.34 No.-
본 논문에서는 인물 및 지문 대조에 강한 영상 압축 웨이브릿을 선정하고 응용 가능한 기반을 구축하기 위한 실험적 연구이다. 실험 방법은 할, 다우비치, 코이프릿, 메이어의 웨이브릿 함수를 이용하여 영상을 변환 후 벡터 양자화 기법을 사용 하여 압축/복원하여 두 화질에 대해 평가하였다. 실험 결과, 할, 다우비치, 코이프릿, 메이어의 웨이브릿이 비교적 인물이나 지문의 특징 추출에 강하다. 따라서, 이 두 요소들을 이용하여 메이어 웨이브릿을 이용한 출입자 관리, 신원조회 시스템에 적용함으로써 대조 오차를 줄이고 압축된 데이터는 데이터베이스 구축에서 저장 영역을 감소시켜 실시간 조회 처리 능력을 향상시킬 수 있다.