Abstract:
본발명은전이금속합금을이용한산소환원촉매에관한것으로, 더욱상세하게는고가의백금촉매를대신하여 Ir, Ni 및전이금속의 3중합금을이용하여제작되는산소환원촉매에관한것이다. 본발명에따른전이금속합금산소환원촉매는고가의백금을사용하지않으며, 팔라듐촉매에비하여전류및 산에안정하므로가격경쟁력이뛰어나고수명이길어효율적인촉매사용에유용하다.
Abstract:
A writing instrument with a calculation function using formula recognition and a calculation system using the formula recognition are provided to receive a formula directly through the writing instrument without hardware, thereby maximizing portability. A formula input unit(201) produces movement information data by sensing motion of a body end of a writing instrument. A formula recognizing unit(202) converts the movement information data into a formula which can be calculated. A calculating device(203) calculates a result value by calculating the recognized formula. A display device(206) outputs at least one between the recognized formula and the result value. A central controller(200) controls all kinds of data transmission. A power managing unit(205) supplies operation power.