• 정보처리학회논문지C
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• 제9C권5호
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• pp.743-748
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• 2002

최근 인터넷에서 QoS(Quality of Service)를 제공하는 방법인 차별 서비스에 대해 많은 연구가 진행중이다. 차별화 서비스에서 보장형 서비스는 2등급 패킷 폐기 우선순위 방법과 RIO(RED with In and Out)를 일반적으로 사용한다. 하지만 이 방법만으로는 대역폭을 만족할 만큼 공평하게 사용자에게 제공하지 못한다. 본 논문에서는 공평성을 개선하기 위한 방법으로 TSW(Time Sliding Window) marking algorithm을 개선하여 TS2W3C(Time Sliding Two Window Three Color)marking algorithm을 제안한다. ns-2를 이용하여 제안된 메커니즘을 모의 실험을 통해 성능을 분석한 결과, 제안한 방법이 기존의 방법에 비해 공평하게 대역폭을 분배하는 것으로 나타났다.

• KIEAE Journal
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• 제17권4호
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• pp.59-65
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• 2017

Purpose: Thermal performance and air tightness of window are improved for the building energy efficiency. As the deteriorated houses are increased, the improve measures with low cost and easy installation are developed in the energy performance of window. Attached glazing and windbreak can be easily applied to the window with low cost. In this paper, the effect of the attached glazing and windbreak on the thermal performance and air tightness of window is analyzed as the measure to improve performance of window. Method: Thermal transmittance of glazing is evaluated through WINDOW simulation according to thickness of attached glazing and air cavity. Based on the simulation results, thermal transmittance, air tightness and condensation resistance performance of four cases are tested according to Korea standards. One type of PVC sliding double window is chosen as the specimen. For the analysis on low performance of window, the outside of window is excluded in the PVC sliding double window. Result: This study shows that thermal performance of glazing can be increased by the application of attached glazing. Furthermore, lower thermal performance of glazing can obtain the higher effect of attached glazing. The application of attached glazing and windbreak can effect on increasing thermal performance and air tightness of window.

• 한국전자파학회논문지
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• 제15권1호
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• pp.81-88
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• 2004

3GPP 표준의 오류 정정 부호 기법 중의 하나로 채택된 turbo 부호는 그 성능이 Shannon이 제시하는 이론적 한계 값에 근사하기 때문에 많은 관심을 받고 있다. 그러나 계산상의 복잡함과 많은 메모리를 요구한다는 단점이 있고 이를 보완할 수 있는 Log-MAP, Max-Log-MAP, SOVA, sliding window 알고리즘 등이 제안되었다. 본 논문에서는 turbo복호 알고리즘을 부동 소수점 연산과 고정 소수점 연산을 이용하여 구현하였을 때 성능을 해석하였다. 그리고 Log-MAP 알고리즘의 성능에 근사하는 효율적인 고정 소수점 구현 방법을 제안하였다. 이 방법을 Log-MAP과 sliding window 알고리즘에 적용하여 성능을 분석하였다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제32권9호
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• pp.912-919
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• 2005

문서 범주화에서 이진 분류를 다중 분류에 적용할 때 일반적으로 '한 범주에 적합-다른 모든 범주에서는 부적합(One-Against-All) 판정 방법'을 사용한다. 하지만, 이러한 '한 범주에 적합-다른 모든 범주에서는 부적합 판정 방법'은 한 가지 문제점을 가지는데, 적합(positive) 집합의 문서들은 사람이 직접범주를 할당한 것이지만 부적합(negative) 집합의 문서들은 사람이 직접 범주를 할당한 것이 아니기 때문에 오류 문서들이 많이 포함될 수 있다는 것이다. 본 논문에서는 이러한 문제점을 해결하기 위해서 슬라이딩 원도우(sliding window) 기법과 EM 알고리즘을 이진 분류 기반의 문서 범주화에 적용할 것을 제안한다. 제안된 기법은 먼저 슬라이딩 윈도우 기법을 사용하여 오류 문서들을 추출하고 이들을 EM알고리즘을 사용해서 다시 범주를 할당함으로써 이진 분류 기반의 문서 범주화 기법의 성능을 향상시킨다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권3호
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• pp.1298-1310
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• 2019

Network coding (NC) is a promising technology that can improve available bandwidth and packet throughput in wireless sensor networks (WSNs). Sliding window is an improved technology of NC, which is a supplement of TCP/IP technology and can improve data throughput and network lifetime on WSNs. This paper proposes a network coding-based maximum lifetime algorithm for sliding window in WSNs (NC-MLSW) which improves the throughput and network lifetime in WSN. The packets on the source node are sent on the WSNs. The intermediate node encodes the received original packet and forwards the newly encoded packet to the next node. Finally, the destination node decodes the received encoded data packet and recovers the original packet. The performance of the NC-MLSW algorithm is studied using NS2 simulation software and the network packet throughput, network lifetime and data packet loss rate were evaluated. The simulations experiment results show that the NC-MLSW algorithm can obviously improve the network packet throughput and network lifetime.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 하계종합학술대회 논문집
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• pp.109-111
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• 1989

In this paper, we propose a new method of parameter est mat ion which modifies the exponentially weighted RLS (WRLS) method using asliding window. It can be used in adaptive control for a class of linear tine varying system. Computer simulations show that our new method tracts rapidly time varying parameters more effectively than WRLS.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2006년도 하계학술발표대회 논문집
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• pp.1075-1080
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• 2006

Purpose of this study is proposal of estimating method about window thermal performance that based on KS F 2278 'Test method of thermal resistance for windows and doors' due to material composition of PVC frame window. First step of this study is research of present state about material composition of PVC frame window. Second is selection of main effective elements about window thermal resistance. For example, composition of Glazing, Frame area ratio of total window area, frame width, opening type, area of heat transfer and so on. Third is multiple regression analysis about thermal performance of PVC frame window due to main effective elements. It produces equations of multiple regression analysis due to opening type. Case of sliding window is $Y=0.149+0.034X_g+0.248X_{far}$, 4track sliding is $Y=0.584+0.175X_g+1.355X_{far}-0.008X_{fw}$, Tilt & Turn window is $Y=-0.161+0.076X_g+0.576X_{far}+0.0008X_{fw}$.

• 한국공간정보시스템학회 논문지
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• 제11권2호
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• pp.7-12
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• 2009

In this paper, we discuss the problem of continuous k.nearest neighbors (CKNN) monitoring over distributed streams wavelet synopses, which also considered sliding window structure under stream based kNN query. We developed traditional skylines techniques and propose a new method which called DR.skylines to process CKNN queries as a bandwidth.efficient approach. It tries to process CKNN queries on synopses for optimized sliding window time and space computation.

• 한국생물정보학회:학술대회논문집
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• 한국생물정보시스템생물학회 2002년도 제1차워크샵
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• pp.139-152
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• 2002

Gene-shaving(Hastie et al, 2000) is a very useful method to identify a meaningful group of genes when the variation of expression is large. By shaving off the low-correlated genes with the leading principal component, the primary genes with the coherent expression pattern can be identified. Gene-shaving method works well If expression levels are varied enough, but it may not catch the meaningful cluster in low expression level or different expression time even with coherent patterns. The sliding window gene-shaving method which is to apply gene-shaving in each sliding window after hierarchical clustering is to compensate losing a meaningful set of genes whose variation is not large but distinct. The performance to identify expression patterns is compared for the simulated profile data by the different variance and expression level.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 I
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• pp.565-568
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• 2003

This paper presents a method that can be used to reduce the decoding computational complexity in turbo codes. To reduce the decoding complexity we proposed an adaptive sliding window method which control the learning period of Viterbi sliding window method depending on channel signal to interference ratio (SIR). When received signal to interference ratio (SIR) is relatively high, we can reduce the decoding complexity without a noticeable degradation of BER performance at CDMA cellular system with power control error.