http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Normal numbers mod 2 on the logistic map
안영호 호남수학회 2013 호남수학학술지 Vol.35 No.4
We show that for the logistic map, almost every x isa normal number mod 2 with respect to all intervals except for[a, b] = [ 14 , 1] or [a, b] = [ 12 -p34, 12 +p34 ]
THE PARITIES OF CONTINUED FRACTION
안영호 호남수학회 2008 호남수학학술지 Vol.30 No.4
Let T be Gauss transformation on the unit interval defined [수식] where {x} is the fractional part of x. Gauss transformation is closely related to the continued fraction expansions of real numbers. We show that almost every x is mod M normal number of Gauss transformation with respect to intervals whose endpoints are rational or quadratic irrational. Its connection to Central Limit Theorem is also shown.
MAG 용접의 스패터 발생 및 용적이행현상에 미치는 Si의 영향
안영호,이종봉,엄동석 대한용접접합학회 1999 대한용접·접합학회지 Vol.17 No.3
The effect of Si content in welding wires on spattering characteristics and droplet transfer phenomena was studied. In MAG welding using 80% Ar-20% $CO_2$ shielding gas, spattering characteristics and droplet transfer phenomena were varied with Si content of wire. With increasing Si content, the spattering ratio and the ratio of large size spatter $(d\geq1.0mm)$ were increased. The increase of Si content in molten metal made surface tension increase due to reduction of oxygen content, which resulted from deoxidizing action of silicon. The increase of surface tension resulted in unstable transfer phenomena and arc instability in both short circuit and spray region. With changing Si content of wire, spattering characteristics and droplet transfer phenomena was directly influenced by the variation of surface tension, compared with the effect of arc stability.
DYNAMICAL PROPERTIES OF A FAMILY OF SKEW PRODUCTS WITH THREE PARAMETERS
안영호 호남수학회 2009 호남수학학술지 Vol.31 No.4
For given a, ω ∈ R and β > 1 , let Tβ,a,ω be the skew-product transformation on the torus, [0, 1) × [0, 1) defined by (x, y) → (βx, y+ax+ω) (mod 1): In this paper, we give a criterion of ergodicity and weakly mixing for the transformation Tβ,a,ω when the natural extension of the given β-transformation can be viewed as a generalized baker's transformation, i.e., they flatten and stretch and then cut and stack a two-dimensional domain. This is a generalization of theorems in [10].
MAG용접의 스패터 발생 및 용적이행현상에 미치는 S의 영향
안영호,이종봉,최원규 대한용접접합학회 2001 대한용접·접합학회지 Vol.19 No.5
The effect of S content in welding wires on spattering characteristics and droplet transfer phenomena was studied. In MAG welding using 80%Ar-$20%CO_2$ shielding gas, spattering characteristics and droplet transfer phenomena were varied with S content of wire. Sulfur addition in wire reduced surface tension of droplet and weld pool, and made arc more stable in MAG welding. With increasing S content, the spattering ratio and the ratio of large size spatter ($d{\geq}1.0mm$) were reduced in short circuit transfer mode. In spray transfer mode, spattering ratio, however was increased when sulfur was added more than 0.020wt.% because surface tension of droplets and weld pool was reduced too much even though arc stability was improved.
안영호,이종봉,엄동석 대한용접접합학회 1998 대한용접·접합학회지 Vol.16 No.1
본 내용에서는 solid wire(1.2 mm)를 대상으로 보호가스, 용접조건 및 용접재료 등이 용적이행현상에 미치는 영향을 용접 중 아크 신호의 변화와 고속카메라에 의한 용적이행현상 관찰 결과를 중심으로 기술하였다.