• International Journal of Fuzzy Logic and Intelligent Systems
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• 제4권3호
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• pp.271-276
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• 2004

This paper is a research on the dynamic signature verification of error rate which are false rejection rate and false acceptance rate, the size of signature verification engine, the size of the characteristic vectors of a signature, the ability to distinguish similar signatures, the processing speed and so on. Also, we present our efficient user interface and performance results.

• Journal of Information Processing Systems
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• 제14권4호
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• pp.807-823
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• 2018

Speaker verification system performance depends on the utterance of each speaker. To verify the speaker, important information has to be captured from the utterance. Nowadays under the constraints of limited data, speaker verification has become a challenging task. The testing and training data are in terms of few seconds in limited data. The feature vectors extracted from single frame size and rate (SFSR) analysis is not sufficient for training and testing speakers in speaker verification. This leads to poor speaker modeling during training and may not provide good decision during testing. The problem is to be resolved by increasing feature vectors of training and testing data to the same duration. For that we are using multiple frame size (MFS), multiple frame rate (MFR), and multiple frame size and rate (MFSR) analysis techniques for speaker verification under limited data condition. These analysis techniques relatively extract more feature vector during training and testing and develop improved modeling and testing for limited data. To demonstrate this we have used mel-frequency cepstral coefficients (MFCC) and linear prediction cepstral coefficients (LPCC) as feature. Gaussian mixture model (GMM) and GMM-universal background model (GMM-UBM) are used for modeling the speaker. The database used is NIST-2003. The experimental results indicate that, improved performance of MFS, MFR, and MFSR analysis radically better compared with SFSR analysis. The experimental results show that LPCC based MFSR analysis perform better compared to other analysis techniques and feature extraction techniques.

• Journal of information and communication convergence engineering
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• 제8권2호
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• pp.140-144
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• 2010

This paper is a research on an evaluating method for the dynamic signature verification system. It is described about various factors such as error rate, the size of signature verification engine, the size of the characteristic vectors of a signature, the ability to distinguish similar signatures, the processing speed of signature verification and so on. This study identifies factors to consider in evaluating signature verification systems comprehensively and objectively without an officially approved signature database, examines the meaning of each of the factors, and proposes criteria for evaluating and analyzing the factors.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 동계학술발표대회 논문집
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• pp.453-458
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• 2007

The importance of the evaluation and verification of small-size cogeneration system has been emphasized because there is no KS-code related to the small-size cogeneration system. The evaluation method of small-size engine cogeneration system was investigated by the reference of Japan evaluation code, JIS B-8122 and international standard organization, ISO-8528. Evaluation method was introduced such as start-test, rapid-load-up and rapid-load-down, etc. The evaluation method was applied to the 300kW small-size gas engine cogeneration system newly developed. The precise and strict evaluation and verification of the system will help the developing cogeneration system to optimum condition. It will also be a base document of KS-Code.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 2005년도 e-Biz World Conference 2005
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• pp.299-304
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• 2005

This paper is a research on the dynamic signature verification of error rate which are false rejection rate and false acceptance rate, the size of signature verification engine, the size of the characteristic vectors of a signature, the ability to distinguish similar signatures, and so on. We suggest feature extraction and comparison method of the signature verification. Also, we have implemented our system with Java technology for more efficient user interfaces and various OS Platforms.

• 한국전자거래학회지
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• 제10권3호
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• pp.49-65
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• 2005

본 논문은 동적(온라인) 서명인증 기술에 관한 것으로 서명의 특징 벡터, 유사 서명에 대한 변별력, 오류율 등에 대해서 살펴보고, 고성능 서명 인증시스템을 위한 특징 추출과 매칭 방법을 제안하고, 보다 효율적인 사용자 인터페이스를 설계하였고, 다양한 OS플랫폼 지원을 위하여 Java 기술을 이용한 웹 인증 서버를 구현하였다.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제4권1호
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• pp.1-8
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• 2015

고안전성이 요구되는 소프트웨어의 경우 극히 낮은 확률로 발생하는 오류로 인하여 전체시스템의 안전에 치명적인 상황을 야기할 수 있으므로, 철저한 안전성 검증이 요구된다. 하지만 모든 가능한 실행경로를 고려해야 하는 안전성 검증은 고비용이 발생한다는 단점이 있다. 본 논문에서는 안전성 검증의 고비용 문제를 개선하기 위해 안전성 특질을 기준으로 코드 슬라이싱 기법[1]을 구현한 도구를 개발하였다. 개발한 도구를 OSEK/VDX[2] 기반의 개방형 차량 전장용 운영체제인 Trampoline[3] 소스코드에 적용한 결과 분석 대상의 코드의 크기를 평균 71% 줄일 수 있었고, 실제 검증을 수행했을 시에도 도구 적용 이전보다 검증 비용을 절감할 수 있었음을 보였다.

• 한국음향학회지
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• 제22권5호
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• pp.383-387
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• 2003

본 논문에서는 기존의 고정크기의 코호트 집단을 기반으로 한 화자검증 방법을 다룬다. 특히, 본 논문에서는 고정크기의 코호트 대신에 화자모델들 사이의 거리를 이용하는 가변크기의 새로운 코호트를 제안한다: 제안된 새로운 방식에서는 각 화자로부터 일정한 거리 내에 있는 주변 화자모델들의 밀집도가 고려된다. 그 화자주변의 밀집도가 높으면 코호트의 크기가 자동적으로 증가되어 화자검증률이 개선되고, 반면 밀집도가 적으면 코호트의 크기가 감소되어 계산량이 줄어든다 실험결과 제안된 방법이 기존의 방식에 비하여 EER (Equal Error Rate)을 감소시킴을 확인할 수 있었다.

• 반도체디스플레이기술학회지
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• 제23권1호
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• pp.25-35
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• 2024

In the present modern day, as the complexity and size of SoC(System on Chip) increase, the importance of design verification are increasing, Therefore it takes a lot of time to verify the design. There is an emerging need to manage the verification environment faster and more efficiently by reusing the existing verification environment. UVM-based verification is a standardized and highly reliable verification method widely adopted and used in the semiconductor industry. This paper presents a UVM-based verification for the 4 tap equalizer module with a systolic array structure. Through the constraints randomization, it was confirmed that various test scenarios stimulus were generated. In addition, by verifying a simulation comparing the actual DUT outputs with the MATLAB reference outputs, the reuse and efficiency of the UVM test bench could be confirmed.

• 대기
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• 제29권5호
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• pp.615-626
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• 2019

To find any effects of precipitation climate on the forecast verification methods, we processed the hourly records of precipitation over South Korea. We examined their relationship between the climate and the methods of verification. Precipitation is an intermittent process in South Korea, generally less than an hour or so. Percentile ratio of precipitation period against the entire period of the records is only 14% in the hourly amounts of precipitation. The value of the forecast verification indices heavily depends on the climate of rainfall. The direct comparison of the index values might force us to have a mistaken appraisal on the level of the forecast capability of a weather forecast center. The size of the samples for verification is not crucial as long as it is large enough to satisfy statistical stability. Our conclusion is still temporal rather than conclusive. We may need the amount of precipitation per minute for the confirmation of the present results.