• Title, Summary, Keyword: Preprocessor

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Implementation of Preprocessor for CSCM code by using Graphic User Interface (그래픽 환경을 이용한 CSCM 수치해석 코드에서의 전처리 과정 개발)

  • Ivanov Evgeny G.;Song Dong Joo
    • 한국전산유체공학회:학술대회논문집
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    • pp.69-75
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    • 2003
  • 본 연구에서는 격자 생성, 초기유동조건 및 경계조건 설정 등 일련의 전처리 과정을 사용자에게 친숙한 그래픽 인터페이스 환경으로 개발하였다. MFC/Visual C++를 이용하여 개발된 전처리 프로그램은 Windows 계열의 OS와 호환이 가능하며, 기하학적 격자생성, 초기값 설정 및 수치해석 코드의 제어변수를 생성할 수 있다. 한편 사용자의 편의를 위해서 전처리 과정을 격자생성(단일격자생성, 다중격자생성), 유체 물성치정의, 경계조건 생성, 초기조건 생성 및 코드제어로 구분하였다. 개발된 전처리 프로그램의 특성으로서 다중 격자 생성 작업을 단일 격자계의 중첩으로 구성될 수 있도록 각 경계면을 "interface"형을 취하는 기능을 제공하도록 하였으며 개발된 전처리 과정을 16도의 경사면을 가지는 Compression ramp 문제 및 축대칭 Bump 문제에 적용하여 개발된 전처리 과정을 검증하였다.

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An image data processing unit of efficient H/W structure for mask/logic operations (마스크/논리 연산에 효율적인 H/W 구조를 갖는 영상 데이터 처리장치)

  • 이상현;김진헌;박귀태
    • 제어로봇시스템학회:학술대회논문집
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    • pp.685-691
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    • 1993
  • This paper introduces a PC-based image data processing unit that is composed of preprocessor board and main processor board; The preprocessor contains Inmos A110 processor and efficient H/W architecture for fast mask/logic operations at the speed of video signal rate. It is controlled by the main processor which communicates with the host PC. The main processor board contains TI TMS320C31 digital signal processor, and can access the frame memory of the processor for extra S/W tasks. We test 3*3, 5*5 masks and logic operations on 386/486/DSP and compare the result with that of the proposed unit. The result shows ours are extremely faster than conventional CPU based approach, that is, over several hundred times faster than even DSP.

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Development of Automatic Node Generation Algorithm and Preprocessing Technique for $\rho$-Version Finite Element Program ($\rho$-Version 유한요소 프로그램을 위한 자동절점생성 알고리즘 및 전처리 기법 개발)

  • 조준형;홍종현;우광성
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.69-76
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    • 1998
  • Due to the drastic improvement of computer hardware and operating system, it is easy to break through the main defects of limited computer memory and processing time, etc. To keep up with this situation, this paper is focused on developing the preprocessor program with the input method based on vector graphic editor and the preprocessing technique including automatic node generation algorithm for the $\rho$-version finite element program. To develop this preprocessor program, the special data structure and the OOP(Object Oriented Programming) have been used by the Visual Basic 4.0. The Special data structure is proposed to describe the geometric data of node numberings and coordinates suitable for the $\rho$-version finite element program, which are quite different from the comvential h-version finite element program.

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Development of Automatic Cutting Tool Selection Program (절삭 공구 자동 선정 프로그램 개발)

  • 김영진
    • Korean Journal of Computational Design and Engineering
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    • v.3 no.3
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    • pp.177-182
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    • 1998
  • The computer related techniques have been developed rapidly in the field of metal removal industry. The electronic catalog for mechanical elements is one of such developments realized in recent years. As the emergence of the electronic catalogs in the 90s, it breaks the restriction of the traditional catalog and becomes a helpful and efficient tool in the field. In this paper, we develop an electronic catalog for the cutting tools of the Korea Tungsten Co. Ltd. The catalog consists of three parts: a preprocessor for tool selection, a database for tool, and a postprocessor for search result. A preprocessor for tool selection is developed under a user-friendly consideration. A database for tool consists of milling, drilling, and reaming tools with a list of cutters, inserts, and components. A postprocessor for search result consists of weight, dimension. drawing, product order number etc. of the tools. It also suggests the optimized cutting condition of the selected tool using a neural network technique which is done by an independent research group.

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STEP 표준을 이용한 제품설계-제조 연계 방안

  • 강무진
    • Proceedings of the CALSEC Conference
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    • pp.531-544
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    • 2001
  • ■ Representing tolerance information together with feature and geometry information in neutral format (using STEP AP 203 and AP 224) ■ Preprocessor of a CAPP System ■ System-independent Interfacing of CAD and CAPP. (omitted)

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A Condition Processing System of Active Rules Using Analyzing Condition Predicates (조건 술어 분석을 이용한 능동규칙의 조건부 처리 시스템)

  • Lee, Gi-Uk;Kim, Tae-Sik
    • The KIPS Transactions:PartD
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    • v.9D no.1
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    • pp.21-30
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    • 2002
  • The active database system introduces the active rules detecting specified state. As the condition evaluation of the active rules is performed every time an event occurs, the performance of the system has a great influence, depending on the conditions processing method. In this paper, we propose the conditions processing system with the preprocessor which determines the delta tree structure, constructs the classification tree, and generates the aggregate function table. Due to the characteristics of the active database through which the active rules can be comprehended beforehand, the preprocessor can be introduced. In this paper, the delta tree which can effectively process the join, selection operations, and the aggregate function is suggested, and it can enhance the condition evaluation performance. And we propose the classification tree which effectively processes the join operation and the aggregate function table processing the aggregate function which demands high cost. In this paper, the conditions processing system can be expected to enhance the performance of conditions processing in the active rules as the number of conditions comparison decreases because of the structure which is made in the preprocessor.

Design of Multi-Purpose Preprocessor for Keyword Spotting and Continuous Language Support in Korean (한국어 핵심어 추출 및 연속 음성 인식을 위한 다목적 전처리 프로세서 설계)

  • Kim, Dong-Heon;Lee, Sang-Joon
    • Journal of Digital Convergence
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    • v.11 no.1
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    • pp.225-236
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    • 2013
  • The voice recognition has been made continuously. Now, this technology could support even natural language beyond recognition of isolated words. Interests for the voice recognition was boosting after the Siri, I-phone based voice recognition software, was presented in 2010. There are some occasions implemented voice enabled services using Korean voice recognition softwares, but their accuracy isn't accurate enough, because of background noise and lack of control on voice related features. In this paper, we propose a sort of multi-purpose preprocessor to improve this situation. This supports Keyword spotting in the continuous speech in addition to noise filtering function. This should be independent of any voice recognition software and it can extend its functionality to support continuous speech by additionally identifying the pre-predicate and the post-predicate in relative to the spotted keyword. We get validation about noise filter effectiveness, keyword recognition rate, continuous speech recognition rate by experiments.

Smart Contract Code Rewritter for Improving Safety of Function Calls (함수 호출의 안전성 향상을 돕는 스마트 계약 코드 재작성기)

  • Lee, Sooyeon;Jung, Hyungkun;Cho, Eun-Sun
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.29 no.1
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    • pp.67-75
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    • 2019
  • When a Solidity smart contract has a problem in calling a function of another contract, the fallback function is supposed to be executed automatically. However, it may be are arbitrarily created, with their behaviors unknown to developers, and fallback function execution is vulnerable to exploits by attackers. in In this paper, we propose a preprocessing based method to reduce the risk with less overhead of developers'. Developers mark the intention using the newly defined keywords in this paper, and the preprocessor reduces the risk by preprocessing the conditional variables and conditional statements according to the keywords.

A Design of false alarm analysis framework of intrusion detection system by using incremental mining method (점진적 마이닝 기법을 적용한 침입탐지 시스템의 오 경보 분석 프레임워크 설계)

  • Kim Eun-Hee;Ryu Keun-Ho
    • The KIPS Transactions:PartC
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    • v.13C no.3
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    • pp.295-302
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    • 2006
  • An intrusion detection system writes a lot of alarms against attack behaviors in real time. These alarms contain not only actual attack alarms, but also false alarms that are mistakes made by the intrusion detection system. False alarms are the main reason that reduces the efficiency of the intrusion detection system, and we propose framework for false alarms analysis in the paper. Also, we apply an incremental data mining method for pattern analysis of false alarms increasing continuously. The framework consists of GUI, DB Manager, Alert Preprocessor, and False Alarm Analyzer. We analyze the false alarms increasingly through the experiment of the proposed framework and show that false alarms are reduced by applying the analyzed false alarm rules in the intrusion detection system.

An Efficient Query Processing in Stream DBMS using Query Preprocessor (질의 전처리기를 사용한 스트림 DBMS의 효율적 질의처리)

  • Yang, Young-Hyoo
    • Journal of the Korea Society of Computer and Information
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    • v.13 no.1
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    • pp.65-73
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    • 2008
  • The telematics data management deals with queries on stream data coming from moving cars. So the stream DBMS should process the large amount of data stream in real-time. In this article, previous research projects are analyzed in the aspects of query processing. And a hybrid model is introduced where query preprocessor is used to process all types of queries in one singe system. Decreasing cost and rapidly increasing Performance of devices may guarantee the utmost parallelism of the hybrid system. As a result, various types of stream DBMS queries could be processed in a uniform and efficient way in a single system.

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