• 제목/요약/키워드: Special function

검색결과 1,375건 처리시간 0.027초

PLC에 의한 8축 동기제어의 구현 (A Study on 8- Axis Servo Sync Control method and Implementation Using PLC Position Control Module)

  • 김석우;김준식;유종선;이영준
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1995년도 하계학술대회 논문집 B
    • /
    • pp.880-882
    • /
    • 1995
  • The systematic function of the PLC (Programmable - Logic Controller) has been enhanced immensely due to the various special modules that consist of the conventional I/O control contants plus special function, which enables the flexible application to highly advanced systems. Position control module is one of the various PLC special module. In this paper, we proposed new synchronized operating method and implemented 8 - axis servo control system. The validity of proposed method is verified througth experimental results and it will be possible to expand 32 - axis servo control system by RS - 485 communication spec.

  • PDF

Botulinum toxin as adjunct therapy in surgical management of a periprosthetic scapular spine fracture: a case report

  • Alex E. White;Christopher M. Brusalis;David S. Wellman;Samuel A. Taylor
    • Clinics in Shoulder and Elbow
    • /
    • 제26권1호
    • /
    • pp.87-92
    • /
    • 2023
  • Six months after undergoing reverse shoulder arthroplasty (RSA) a 73-year-old woman sustained a periprosthetic scapular spine fracture following a fall. She was treated with open reduction and internal fixation (ORIF), followed by botulinum toxin injection into the deltoid muscle to temporarily minimize strain at the fracture. Fracture union was achieved by 3 months, with excellent clinical function more than 1 year following fracture fixation and full resolution of deltoid function. Scapular spine fracture following RSA can be treated with ORIF and temporary deltoid paralysis using botulinum toxin in the immediate postoperative period to safely support fracture healing.

A duplication formula for the double gamma function $Gamma_2$

  • Park, Junesang
    • 대한수학회보
    • /
    • 제33권2호
    • /
    • pp.289-294
    • /
    • 1996
  • The double Gamma function had been defined and studied by Barnes [4], [5], [6] and others in about 1900, not appearing in the tables of the most well-known special functions, cited in the exercise by Whittaker and Waston [25, pp. 264]. Recently this function has been revived according to the study of determinants of Laplacians [8], [11], [15], [16], [19], [20], [22] and [24]. Shintani [21] also uses this function to prove the classical Kronecker limit formula. Its p-adic analytic extension appeared in a formula of Casson Nogues [7] for the p-adic L-functions at the point 0.

  • PDF

A DEFINITE INTEGRAL FORMULA

  • Choi, Junesang
    • East Asian mathematical journal
    • /
    • 제29권5호
    • /
    • pp.545-550
    • /
    • 2013
  • A remarkably large number of integral formulas have been investigated and developed. Certain large number of integral formulas are expressed as derivatives of some known functions. Here we choose to recall such a formula to present explicit expressions in terms of Gamma function, Psi function and Polygamma functions. Some simple interesting special cases of our main formulas are also considered. It is also pointed out that the same argument can establish explicit integral formulas for other those expressed in terms of derivatives of some known functions.

3D Display: From Autostereoscopic to True 3D

  • Qibin, Feng;Guoqiang, Lv;Yuehui, Hu
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
    • /
    • pp.139-142
    • /
    • 2008
  • Developing from stereoscopic to autostereoscopic, researchers on display technology are trying to provide more depth cues to viewer, leading to the advent of true 3D display. Volumetric 3D displays seem to be practical technology at present. Ultimate display will function like human vision system, with characteristics of providing all depth cues and free interaction.

  • PDF

다단 고체연료 우주발사체의 비행궤적 최적화기법 비교 (Comparison of the trajectory optimization methods for multi-stage solid boost launcher)

  • 진재현;탁민제
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1991년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 22-24 Oct. 1991
    • /
    • pp.413-418
    • /
    • 1991
  • Two methods are applied to the problem of trajectory optimization for launch vehicles which burn solid propellant. One is 'Optimal Control' theory, the other is 'NonLinear Programming' method. Trajectory optimization for solid rocket motors has a special problem. The special problem is that the payload of launch vehicle is not the function of control variable. This paper deals with this special problem.

  • PDF