것을 알 수 있다.
따라서, 후방연산자의 확률계수인 > 0 이면 표본자기상관함수 SACF는
지수적(exponentially)으로 0에 접근하고, < 0 이면 SACF는 진동(oscillatory)하는 형태로 0에 접근한다. 만일 가 비정상과정인 1에 가까운 경우에 감소하는 속도는 매우 느리고 지속적인 쌍곡선(hyperbolic)형태를 보인다.
1.1 Study Designs
․Retrospective Studies
․Prospective Studies
※ Survival Analysis
; Deals with analysis of data that have "time to an event".
※ Survival time
; Time until an event occurs.
※ Event
; a. relapse of a disease
b. death
c. response to a treatment
; Economical,
To obtain answers quickly because the cas
1. Introduction
The Korean futures market, including day time and night time, has become the largest futures market all around the world in terms of trading volume. Although Korean futures market has a variety of futures, the main underlying asset for futures that led the market to the summit is KOSPI 200 index, which is composed of diversified two hundred companies’ stocks traded in KOSPI ma
2.3 C-V graph
The measured MOS capacitance (called gate capacitance) varies with the applied gate voltage.
① Measurement of C-V characteristics
-Apply any DC bias, and superimpose a small (15 mV) ac signal
-Generally measured at 1 MHz (high frequency) or at variable frequencies between 1KHz to 1 MHz
-The dc bias VG is slowly varied to get quasi-continuous C-V characteristics
② C-V chara
4. Equipment
4.1 RCA cleaning
RCA cleaning is a series of rinsing procedure prior to experiment with Si wafer. The purpose of the RCA clean is to remove organic contaminants (such as dust particles, grease or silica gel) from the wafer surface. There are three steps to be performed. The first step is to remove organic contaminant from surface of wafer. Second step is to remove any oxide layer