http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
황희진,신기일,Hwang, Hee-Jin,Shin, Key-Il 한국통계학회 2009 응용통계연구 Vol.22 No.2
국내외적으로 지역통계에 관한 관심이 높아지고 있으며 이와 관련하여 소지역 추정에 관한 많은 연구가 진행되고 있다. 소지역 추정에 사용되는 추정량의 대부분은 MSE(moan squared error)를 최소화하여 얻어진다 (Rao, 2003). 최근 황희진과 신기일 (2008)은 MSPE(mean squared percentage error)를 최소화하는 추정량을 사용한 소지역 추정법을 제안하였다. 본 논문에서는 노동통계 중 지청별 일인당 평균 임금총액 추정에 황희진과 신기일 (2008)이 제안한 방법을 적용하여 보았으며 2007년 매월 노동통계 자료를 이용하여 기존의 MSE를 최소화 하여 얻어진 여러 추정량과 우수성을 비교해 보았다. 또한 노동통계를 위 한 소지역 추정의 실제 사용 가능성을 살펴보았다. Many researches have been devoted to the small area estimation related with the area level statistics. Almost all of the small area estimation methods are derived based on minimization of mean squared error(MSE). Recently Hwang and Shin (2008) suggested an alternative small area estimation method by minimizing mean squared percentage error. In this paper we apply this small area estimation method to the labor statistics, especially monthly wages by a branch area of labor department. The Monthly Labor Survey data (2007) is used for analysis and comparison of these methods.
의사소통으로서의 쓰기가 수학 학습 능력 및 수학적 태도에 미치는 영향
황희란,정은실 진주교육대학교 과학교육연구소 2000 科學敎育硏究 Vol.26 No.-
An important topic in current mathematics education research is to relate mathematics to communication. Communication in mathematics has been highlighted as an important goal for all children. And because writing is a way of clarifying and refining one's own thoughts, written communication is important. The purpose of this study is to examine the effects of mathematical writing activities on the achievement of elementary children in mathematics and on affective domain. That is, this study focuses on investigating the effects of mathematical writing activities on ability in and on attitudes towards mathematics. This study was designed to use nonequivalent control group pretest -posttest design. Two 6th grade classes were selected from an elementary school in Chinhae for this study, one for an experimental group and the other for a control group. One class was taught mathematics by using methods of writing activities and the other was taught by traditional methods. Students of experimental group were given worksheets for cultivating mathematics learning abilities in every session. These worksheets include completion, lead sentences, warm-ups, rewording, word banks and debriefing. And they were given worksheets for improving in mathematical attitudes one or two times in a week. They were asked to express feelings about mathematical story, to solve a mathematical puzzle, to draw a figure and to write about a given subject. This study was lasted from May 29, 2000 to July 15, 2000 for 7 weeks. The results obtained from the data analysis were as follows : 1.There was a significant difference between the experimental group and the control group in mathematics learning ability at the significant level of .01. 2.There was a significant difference between the experimental group and the control group in mathematical attitudes at the significant level of .05. That is, this research shows that writing activities in mathematics affect positively on mathematical attitudes such as learning attitudes of mathematics, the appreciation of usefulness about mathematics and the degree of interest in mathematics. The mean score of confidence on mathematics in an experimental group increased, but it is not significant. The results are like theses. An experimental group which has clone mathematical writing activities showed better mathematics teaming abilities and mathematical attitudes in affection domain than a control group which has not. The fact, tells us that mathematical writing activities make children to enhance the mathematical power and are effective to build up children's attitudes towards mathematics.
황희성,임기원,이광복,조병선,차동진 대한설비공학회 2000 설비공학 논문집 Vol.12 No.8
A numerical study has been conducted to characterize the transient pressure in a building water supply system with an air chamber by utilizing a commercial code that employs the method of characteristics. Some results produced for the purpose of verification in the study agree quite well with the previously reported. Several parameters are then varied. Among them are the valve closure time, the wave speed, the static pressure, the polytropic exponent, the air chamber volume, the inner diameter and the shape of orifice in the air chamber, etc, while the water temperature and velocity are kept constant at $20^P{circ}C $, and 0.8 m/s, respectively, Results reported in this parametric study may be useful to understand the unsteady behavior of the system.
황희연 한국공간환경학회 1998 공간과 사회 Vol.10 No.-
우리나라가 경제위기에 처하면서 정부가 시행하고 있는 각종 토지이용규제완화정책에 대해 비판적 논리를 전개한다. 우선 토지를 일반 시장경제에 맡겨서는 안되는 이유와 토지규제의 당위성을 제시하며, 이어서 정부의 토지정책이 지닌 다음 4가지 오류를 제시한다. 첫째, 토지규제완화는 우리가 처한 국가경제를 회복시키는 데 도움이 안된다. 둘째, 개발 위주의 정책으로는 국제동향에 대처할 수 없다. 셋째, 수요를 따라가는 토지공급정책으로는 우리의 토지문제를 해결할 수 없다. 넷째, 경제정책의 수립과정에서 농지보전문제를 간과해서는 안된다. 이상의 논리적 근거를 통해 도시이용의 행정절차과정에 대한 규제는 대폭 완화하되, 토지이용 자체에 대한 규제완화는 신중을 기해야 하며 오히려 강화를 해야 할 부분이 많다는 결론을 도출한다.
소결과정에서 Fe_2O_3-CaO-Al_2O_3-SiO_2계로부터 Calcium-Ferrite 생성거동에 미치는 염기도의 영향
黃熙鎭,車榮宰,兪炳敦,韓晶煥,李始衡,許完旭 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.5
The effect of the basicity on the formation behaviour of calcium ferrites was investigated in the sintering process of Fe_2O_3-CaO-Al_2O_3-SiO_2 system. In the system of Fe_2O_3-CaO-Al_2O_3, the mineral structure consists of iron oxide particles and matrix phase, which is likely to be CF(calcium ferrite). When SiO_2 is added into Fe_2O_3-CaO-Al_2O_3 system, the area fraction of CF decreases sharply. When the basicity(CaO/SiO_2) decreases below the unity, CF does not form, and the mineral structure is composed of iron oxide particles and the silicate slag. The iron oxide particles are mainly magnetite in the temperature range higher than 1300℃, while they consist of both magnetite and hematite at the temperatures below 1250℃. When SiO_2 is added into Fe_2O_3-CaO-Al_2O_3 system, the formation of hematite is promoted in the lower temperature range. The increase of SiO_2 content tends to change the composition of CF from hemi-CF to mono-CF. The solubility of solutes such as CaO, Al_2O_3 and SiO_2 in CF increase with the increase of SiO_2 content in the system.