• Journal of the Korean Data and Information Science Society
• /
• 제21권1호
• /
• pp.51-59
• /
• 2010

일반화선형모형에서 회귀함수가 하나의 불연속점을 가질 때, Huh (2009)는 하나의 모수를 가지는 지수족의 가능도함수를 한쪽방향커널을 이용하여 그 불연속점의 위치와 점프크기를 추정하였다. 이 논문에서는 미지의 불연속점 수 q개를 가지는 회귀함수인 경우에, Huh (2009)가 제안한 점프크기 추정량의 점근분포를 이용한 가설검정법을 소개하고, 그 가설검정법을 이용한 불연속점 수를 추정하는 알고리듬을 제안하고, 모의실험을 통하여 추정의 정도를 알아보고자 한다.

• Journal of the Korean Data and Information Science Society
• /
• 제13권2호
• /
• pp.77-85
• /
• 2002

The statistical testing methods have been widely recognized to determine the plain and cipher texts. In fact, the randomness for a sequence from an encryption algorithm is necessary to guarantee security and reliance of cipher algorithm. Thus, the statistical randomness tests are used to discover cipher text. In this paper, we would provide the critical value for an approximate entropy test by estimating the nonlinear regression equation when the number of sequence and the level of significance are given. Thus, we can discern plan and cipher text for real problem with given number of sequence and the level of significance. Also, we confirm the fitness of the estimated critical values from the rate of success for plain or cipher text.

• 품질경영학회지
• /
• 제21권2호
• /
• pp.162-169
• /
• 1993

For the problem of testing the parallelism of several regression lines against ordered alternatives, two test statistics and proposed and examined. The proposed statistics are linear combinations of robust estimators of slope parameters, which are modifications of the Adichie (1976) test based on scores. The asymptotic null variances of the proposed states tics are estimated by the kernel density estimation methods. The proposed tests are compared with the Adichie's test in terms of asymptotic relative efficiency and small-sample powers.

• 응용통계연구
• /
• 제8권2호
• /
• pp.77-86
• /
• 1995

본 논문에서는 두 회귀직선의 평행성에 대한 로버스트 검정법을 제안하고, 모의실험과 예를 통하여 기존의 방법들과 유의수준의 안정성 및 검정력의 측면에서 비교하였다. 제안된 검정법은 Song et al. (1994b)에 의하여 제안된 최소절사제곱 추정량을 초기치로 하는 일단계 GM-추정량에 기초를 두고 있다. 이 추정량은 최대붕괴점과 유계영향함수를 갖는 것으로 알려져 있다.

• 응용통계연구
• /
• 제11권1호
• /
• pp.97-111
• /
• 1998

본 논문에서는 회귀모형 오차항의 1차 자기상관에 대한 베이즈 검정법을 제안하였다. 이를 위해 자기상관검정에서 설정된 귀무 및 대립가설간에 베이즈 요인을 도출하고, 이를 근사추정하는 방법을 일반화 Savage-Dickey 밀도비와 Gibbs 추출법의 합성을 통해 제시하였다. 또한, 근사추정의 효율 및 제안된 검정법의 검정력을 평가하기 위해서 모의실험과 경험적 자료분석 예를 사용하였다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
• /
• pp.211-213
• /
• 2006

In this study, plasma etching process was modeled by using support vector machine (SVM). The data used in modeling were collected from the etching of silica thin films in inductively coupled plasma. For training and testing neural network, 9 and 6 experiments were used respectively. The performance of SVM was evaluated as a function of kernel type and function type. For the kernel type, Epsilon-SVR and Nu-SVR were included. For the function type, linear, polynomial, and radial basis function (RBF) were included. The performance of SVM was optimized first in terms of kernel type, then as a function of function type. Five film characteristics were modeled by using SVM and the optimized models were compared to statistical regression models. The comparison revealed that statistical regression models yielded better predictions than SVM.

• 통상정보연구
• /
• 제11권2호
• /
• pp.329-342
• /
• 2009

The purpose of this study was to identify the issues which how situational constraints of negotiation affect outcomes. To achieve the purpose of this research, a multiple regression model was set up to identify the relationships between situational constraints of negotiation and negotiation outcome on international trade contracts. To implement the study, empirical questionnaires were collected from Korean business men who have actually conducted international trade with foreign firms. Reliability analysis and factor analysis were used to assess the reliability and validity of research variables. and multiple regression analysis were used for testing the relationships between situational constraints of negotiation and negotiation outcome. From this study, following results were identified; i) situational constraints of negotiation effects on negotiation outcomes ii) arbitrary and continuous situations affect significantly positive on negotiation outcomes iii) submissive situations affect significantly negative effects on negotiation outcomes In conclusion, participant of negotiation and their managers try to promote negotiation situation toward to arbitrary and continuous situations if they have any availability.

• Journal of the Korean Data and Information Science Society
• /
• 제12권1호
• /
• pp.27-40
• /
• 2001

본 연구는 시간의 변화에 따라 여러 개의 전환점이 발생하여 선형회귀모형들이 여러번 변화할 때의 변환시점을 Gasser, Stroke와 Jennen-Steinmez의 잔차분산 추정량을 이용하여 검정하고 실제의 몇 가지 모형을 제시하여 Graphic을 통하여 조사한 결과 여기서 제시한 방법이 더 효과적으로 자중전환점을 찾을 수 있었다.

• Journal of Information Technology Applications and Management
• /
• 제14권4호
• /
• pp.221-233
• /
• 2007

Which factors should influence consumer consideration to subscribe to Voice over Internet Protocol (VoIP)? Policy issues, managerial concerns, and demographic variables are possible factors. This paper discusses policy and managerial issues regarding VoIP adoption. A model that explains VoIP adoption is proposed and tested. This study analyzes a survey of 750 prospective VoIP users in Korea. The testing is accompanied by logistic regression and discriminant analysis. The results show that trust in VoIP, relative comparison of Quality to fixed service, numbering plan, satisfactions of call Quality and customer services on both fixed and mobile services have impacts on the adoption of VoIP. Implications for VoIP providers and policy makers are presented.

• 접착 및 계면
• /
• 제21권1호
• /
• pp.6-13
• /
• 2020

The objective of the current study is to characterize the long-term stability and efficacy of a structural adhesive assembly under static load. An apparatus was designed to be used in the Instron tensile test machine that would allow for real time modeling of the failure characteristics of an assembly utilizing a moisture- cure adhesive which was bonded to concrete. A regression model was developed that followed a linear - natural log function which was used to predict the expected life of the assembly. Evaluations at different curing times confirmed the structure was more robust with longer cure durations prior to loading. Finally, the results show that under the conditions the assembly was tested, there was only a small amount of inelastic creep and the regression models demonstrated the potential for a stable structure lasting several decades.