• Title, Summary, Keyword: Preprocessor

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Development of Preprocessor for Real-time Quality Evaluation of Milk - Automatic Supplying, Mixing and Temperature Control - (우유의 실시간 품질판정을 위한 전처리장치 개발 - 자동 공급, 혼합 및 온도 제어 -)

  • Choi, C.H.;Kim, Y.J.;Kim, J.D.;Kim, K.S.;Noh, H.W.
    • Journal of Biosystems Engineering
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    • v.33 no.2
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    • pp.130-135
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    • 2008
  • The purpose of this study was to develop a preprocessor for real-time portable quality evaluation system of milk. The preprocessor consisted of two flow pump to supply milk sample and reaction reagent at given volume, a fan to mix milk with reaction reagent, a thermoelectric device to maintain sample temperatures of $40^{\circ}C$, and I/O interface to control signals. The tests conducted with different level of flow rate of pump, fan speed, ambient temperature, and intial temperature of mixtures. To evaluate performance of the preprocessor, the supplied volumes, color changes, and temperatures were measured and analyzed. The results showed that the preprocessor could control supplying volumes, mixing, temperatures of samples automatically. The preprocessor showed good performance to be used for portable quality evaluation system of milk.

Development of CAMPform2D Preprocessor for Forming Process U sing Convenient Input Method (편리한 입력방식의 단조공정해석을 위한 CAMPform 2D의 Preprocessor 개발)

  • 박성균;이상헌;이강수
    • Korean Journal of Computational Design and Engineering
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    • v.9 no.2
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    • pp.133-142
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    • 2004
  • CAMPfonn2D is a Finite Element Method (FEM) based process simulation system designed to analyze two dimensional (2D) flow of various metal forming processes. It enables designers to analyze metal forming processes on the computer rather than the shop floor using trial and error and provides vital information about material and thermal flow during the forming process to facilitate the design of products. CAMPfonn2D can be used by companies, research institutes and industrial applications to analyze forging, extrusion, drawing, heading, upsetting and many other metal forming processes. Also, process simulation using CAMPfonn2D can be instrumental in cost, quality and delivery improvements at leading companies. Today's competitive pressures require companies to take advantage of every tool for rapid manufacturing of well-designed product. So, the preprocessor of simulation program must be easy to use to speed-up design. In this paper, we introduce new version of Preprocessor and show how easy to use it. And, Preprocessor will prove itself to be easy and extremely effective.

Implementation of A Fast Preprocessor for Isolated Word Recognition (고립단어 인식을 위한 빠른 전처리기의 구현)

  • Ahn, Young-Mok
    • The Journal of the Acoustical Society of Korea
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    • v.16 no.1
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    • pp.96-99
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    • 1997
  • This paper proposes a very fast preprocessor for isolated word recognition. The proposed preprocessor has a small computational cost for extracting candidate words. In the preprocessor, we used a feature sorting algorithm instead of vector quantization to reduce the computational cost. In order to show the effectiveness of our preprocessor, we compared it to a speech recognition system based on semi-continuous hidden Markov Model and a VQ-based preprocessor by computing their recognition performances of a speaker independent isolated word recognition. For the experiments, we used the speech database consisting of 244 words which were uttered by 40 male speakers. The set of speech data uttered by 20 male speakers was used for training, and the other set for testing. As the results, the accuracy of the proposed preprocessor was 99.9% with 90% reduction rate for the speech database.

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Low Complexity Channel Preprocessor for Multiple Antenna Communication Systems (다중 안테나 통신 시스템을 위한 저복잡도 채널 전처리 프로세서)

  • Hwang, You-Sun;Jang, Soo-Hyun;Han, Chul-Hee;Choi, Sung-Nam;Jung, Yun-Ho
    • The Journal of Advanced Navigation Technology
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    • v.15 no.2
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    • pp.213-220
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    • 2011
  • In this paper, the channel preprocessor with an area-efficient architecture is proposed for the MIMO symbol detector which can support four transmit and receive antennas. The proposed channel preprocessor can shrink the channel dimension to reduce the hardware complexity of the MIMO symbol detector. Also, the proposed channel preprocessor is implemented with very low complexity by using QR decomposition (QRD) and log-number system (LNS). By applying QRD and LNS to the nulling matrix calculation block, the numbers of matrix-multiplications and matrix-divisions are decreased and thus the complexity of the proposed channel preprocessor is significantly reduced. The proposed channel preprocessor was designed in a hardware description language (HDL) and synthesized to gate-level circuits using 0.13um CMOS standard cell library. With the proposed channel preprocessor, the number of logic gates for channel preprocessor is reduced by 20.2% compared with the conventional architecture.

Development of a neural network with fuzzy preprocessor (퍼지 전처리기를 가진 신경회로망 모델의 개발)

  • 조성원;최경삼;황인호
    • 제어로봇시스템학회:학술대회논문집
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    • pp.718-723
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    • 1993
  • In this paper, we propose a neural network with fuzzy preprocessor not only for improving the classification accuracy but also for being able to classify objects whose attribute values do not have clear boundaries. The fuzzy input signal representation scheme is included as a preprocessing module. It transforms imprecise input in linguistic form and precisely stated numerical input into multidimensional numerical values. The transformed input is processed in the postprocessing module. The experimental results indicate the superiority of the backpropagation network with fuzzy preprocessor in comparison to the conventional backpropagation network.

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Implementation and Experiments of SAT preprocessor (SAT Preprocessor의 구현 및 실험)

  • 남명진;최진영;곽희환
    • Proceedings of the Korean Information Science Society Conference
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    • pp.517-519
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    • 2003
  • 하드웨어 검증과 모델 체킹 등의 분야에서, SAT(satisfiability problem)나 항진 명제 검사(tautology checking)는 매우 중요한 문제이다. 그러나 이들은 모두 NP-complete 문제이므로 그 복잡도가 매우 크다. 이를 해결하기 위한 여러 연구가 진행되고 있고, 그 결과 성능이 좋은 solver들이 개발되었다. 하지만 문제가 커질수록 solver의 처리 시간이 급격하게 증가한다. 이 논문에서는 solver가 복잡한 문제를 더 효율적으로 풀기 위해 논문“Local search for Boolean relations on the basis of unit propagation”[5]에서 제안된 preprocessor(전처리기), P_EQ의 개념을 설명하고, 실험을 통한 결과를 제시한다.

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IMPLEMENTATION OF FULL WEB-BASED GRAPHIC USER INTERFACE PROCESSOR FOR CFD SOFTWARE (웹 기반 CFD s/w용 GUI 프로세서의 구현)

  • Juraeva Makhsuda;Ivanov Evgeny G.;Song Dong Joo
    • 한국전산유체공학회:학술대회논문집
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    • pp.121-125
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    • 2004
  • The preprocessor - solver - postprocessor software for 2D/Axisymmetric CSCM Upwind Flux Difference Splitting Navier-Stokes code has been developed for undergraduate educational purpose. This computational fluid dynamics (CFD) software allows students to setup, solve, visualize and control dynamically server for their own fluid problems via Internet. The preprocessor Is capable of generating geometry and grid, initial solution data and required solver control parameters. The postprocessor shows vector plot and contour plot with different options while residual plot shows root-mean-square (RMS) error history graphically and retrieves the data from solver interactively. Special feature of the preprocessor is grid generation part which is based on MFC/Visual C++ application and FORTRAN single block grid generator process. Many users can access solver via Internet from client computers and solve desired problems using locally installed pre- and postprocessor and remote powerful solver part.

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Performance Improvement of Stereo Acoustic Echo Canceler using the Difference of Stereo Signals (스테레오 신호의 차성분을 이용한 스테레오 음향 반향 제거기의 성능 향상)

  • 김현태;박장식;손경식
    • Journal of Korea Multimedia Society
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    • v.3 no.6
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    • pp.604-610
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    • 2000
  • A stereo acoustic echo canceller has significant cross-correlation between each channel signal. As the result, the adaptive filter coefficient that estimates the acoustic echo path of a receiving room can misconverge to the path or converge slowly. In this paper, a new preprocessor using absolute difference in stereo signals is proposed to reduce cross-correlations and to improve the removal efficiency of the stereo acoustic echo. Compared to the previous preprocessor using a half wave rectifier, the newly proposed preprocessor showed better performance according to computer simulation. In addition, when the paths of transmitting room were changed the performance of the proposed preprocessor was not degraded.

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RP Preprocessor Based on Distributed Objects (분산객체를 응용한 RP Preprocessor의 기능 구현)

  • 지해성;이승원
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.2
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    • pp.120-128
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    • 2003
  • When considering the use of rapid prototyping (RP), there are many issues a designer has to address for handling an STL model, the de facto standard fur RP. Today designers can skip all these issues by visiting web-based service bureaus that readily supply needed information for the RP services. Since orders are taken for RP parts through the web page of service providers designers are now asked to upload their STL files to the company server either by direct upload, ftp file transfer, or as an e-mail attachment. If the service bureau, however, fixes or edits an STL filceto optimize the RP process but neglects to tell its customer about the rework in detail, it may cause problems down the line in processing of the original CAD data for other applications. In this paper, we propose a framework for a collaborative virtual environment between CAD designers and RP processes on the internet which directly provides designers with an advanced preprocessor functionality, design visualization, as well as model display, repair, and slicing over the network. This can help smooth data transfer from CAD to RP process with minimum inconsistency in CAD.

Design and Implementation of JPP(JNI Preprocessor) (JPP(JNI 전처리기)의 설계 및 구현)

  • Lee, Chang-Hwan;O, Se-Man
    • The KIPS Transactions:PartA
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    • v.9A no.1
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    • pp.129-136
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    • 2002
  • JNI is a linkage method to other languages such as C/C++ which enables the Java to do the platform-dependent specific tasks and also, it can be used to reuse the existing libraries and programs. However, the complex and difficult steps are required to use JNI and it is Inconvenient to manipulate Java source and C/C++ source separately. We design and implement the JPP (Java Preprocessor) that enables the Java source and C/C++ source to handle in a same source file and reduces the required steps so as to use JNI easily.