two power sources – an engine and a secondary cell. These sources work respectively or simultaneously according to the driving condition to increase efficiency. Hybrid cars run on battery power at low speeds and switch to traditional internal-combustion at higher speeds. Since the capability of a secondary battery is not enough to replace the existing engine, it still needs to have both bat
Q/V
SI unit of capacitance is the farad; 1 farad is 1 coulomb per volt. Capacitance can be calculated if the geometry of the conductors and the dielectric properties of the insulator between the conductors are known. For example, the capacitance of a parallel-plate capacitor constructed of two parallel plates both of area A separated by a distance d is approximately equal to the following:
1. 기존 PLANT 내의 제어실에 새로운 CONTROL SYSTEM 을 설치하고 기존 CONTROL SYSTEM 과의 DATA COMMUNICATION을 하려고 한다. 이때 고려해야할 사항을 설명하시오. 또한, OSI (Open System Interconnection) 7 Layer 에 대해 설명하고 TCP/IP 4계층과 비교 및 적용되는 Protocol의 예를 드시오.
① 이기종간의 제어시스템간의 데이타