• Title/Summary/Keyword: calculation program

Search Result 1,348, Processing Time 0.023 seconds

디지털 필터 전용처리기의 설계와 구성에 관한 연구

  • 남상엽;박인정;이태원
    • Proceedings of the Korean Institute of Communication Sciences Conference
    • /
    • 1984.04a
    • /
    • pp.29-32
    • /
    • 1984
  • A microprocessor for the dedicated purpose of digital filtering has been designed and constructed. A microsequencer to control the flowing of data is designed with the concept of a hardware compiler of AHPI, statements. In order to save the processing time, this system utilizes parallel data calculation method instead of the one proposed by Peled and Liu which depended on serial calculation method. The flexible program control technique has been applied to the implementation of the sepcialprocessor for the digital signal processing.

  • PDF

Mutual Inductance of the Non-Coaxial Coils in Coil Gun

  • Kim, Ki-Bong
    • Proceedings of the KIEE Conference
    • /
    • 1994.11a
    • /
    • pp.120-123
    • /
    • 1994
  • The purpose of this paper is to describe the mutual inductance between two non-coaxial circular coils in coil gun. As being in many electromagnetic applications, one of them is fixed and the other one is moving and, being not supported, its axis may not coincide with the axis of the fixed coil. This paper presents a method for the calculation of the mutual inductance in case of non-coaxial coupled coils, the characteristics of this inductance and experimental results. For the computation, the complete elliptic integrals formula and mesh matrix technique were introduced. This method enables accurate results from relatively simple procedure and calculation program.

  • PDF

Development and application of Auto-Wind program for automated analysis of wind resource (풍력자원해석 자동화 프로그램 Auto-Wind 개발과 응용)

  • Yoon, Seong-Wook;Jeon, Wan-Ho;Kim, Hyun-Goo
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 2010.11a
    • /
    • pp.191-191
    • /
    • 2010
  • As many researchers want to predict or assess more about wind condition and wind power generation, CFD(Computational Fluid Dynamics) analysis method is very good way to do predict or assess wind condition and power generation. But CFD analysis is needed much knowledge of aerodynamics and physical fluid theory. In this paper, Auto-Wind CFD analysis program will be introduced. User does not need specific knowledge of CFD or fluid theory. This program just needs topographical data and wind data for initial condition. Then all of process is running automatically without any order of user. And this program gives for user to select and set initial condition for advanced solving CFD. At the last procedure of solving, Auto-Wind program shows analysis of topography and wind condition of target area. Moreover, Auto-Wind can predict wind power generation with calculation in the program. This Auto-Wind analysis program will be good tool for many wind power researchers in real field.

  • PDF

Analysis of Design and Operation Performance of Micro Gas Turbine : Part 1 - Performance Analysis Program (마이크로 가스터빈 설계 및 운전 성능 분석 : 제1부 - 성능해석 프로그램)

  • Kim, Jeong Ho;Kang, Do Won;Kim, Tong Seop
    • The KSFM Journal of Fluid Machinery
    • /
    • v.18 no.4
    • /
    • pp.22-29
    • /
    • 2015
  • In this study, an in-house program to predict steady state operation of micro gas turbines is constructed using MATLAB. The program consists of two parts: design and off-design simulations. The program is fully modular in its structure, and performance of each component (compressor, combustor, turbine, recuperative heat exchanger and pipe elements) is calculated in a separate calculation module using mass and energy balances as well as models for off-design characteristics. The off-design modules of compressor and turbine use performance maps, which are program inputs. The off-design operation of a micro gas turbine under development was predicted by the program. The prediction results were compared with those by commercial software, and the validity of the in-house program was confirmed.

Ideal Freezing Curve Can Avoid the Damage by Latent Heat of Fusion During Freezing (냉동 시 잠재용융열에 의한 피해를 최소화할 수 있는 이상냉동 곡선)

  • 박한기;박영환;윤웅섭;김택수;윤치순;김시호;임상현;김종훈;곽영태
    • Journal of Chest Surgery
    • /
    • v.36 no.4
    • /
    • pp.219-228
    • /
    • 2003
  • Background:Liquid nitrogen freezing techniques have already met with widespread success in biology and medicine as a means of long-term storage for cells and tissues. The use of cryoprotectants such as glycerol and dimethylsulphoxide to prevent ice crystal formation, with carefully controlled rates of freezing and thawing, allows both structure and viability to be retained almost indefinitely. Cryopreservation of various tissues has various con-trolled rates of freezing. Material and Method: To find the optimal freezing curve and the chamber temperature, we approached the thermodynamic calculation of tissues in two ways. One is the direct calculation method. We should know the thermophysical characteristics of all components, latent heat of fusion, area, density and volume, etc. This kind of calculation is so sophisticated and some variables may not be determined. The other is the indirect calculation method. We performed the tissue freezing with already used freezing curve and we observed the actual freezing curve of that tissue. And we modified the freezing curve with several steps of calculation, polynomial regression analysis, time constant calculation, thermal response calculation and inverse calculation of chamber temperature. Result: We applied that freezing program on mesenchymal stem cell, chondrocyte, and osteoblast. The tissue temperature decreased according to the ideal freezing curve without temperature rising. We did not find any differences in survival. The reason is postulated to be that freezing material is too small and contains cellular components. We expect the significant difference in cellular viability if the freezing curve is applied on a large scale of tissues. Conclusion: This program would be helpful in finding the chamber temperature for the ideal freezing curie easily.