• Title, Summary, Keyword: design rule

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EMC Design of Communication System on the basis of EMC Design Rule (EMC Design Rule을 이용한 통신 System의 EMC Design)

  • 박학병;박종성;이승한;강석한;박현길
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • pp.272-276
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    • 2000
  • 본 논문에서는 I/O Cable을 가지는 일반 통신시스템의 전자파 방사 Mechanism을 분석하고, Design에 있어 중요한 Parameter를 도출하였다. 중요한 Design Parameter로 도출된 I/0 Cable의 Coupling mechanism을 실험 및 상용 Software를 이용한 Simulation방법에 의해 분석하고, 이에 대한 EMC Design Rule을 제시하였다. 도출된 EMC Design Rule을 준수하여 Design을 실현하고, 그 효과를 분석하였다. EMC Design Rule에 기반을 둔 개발을 통해 제품의 Redesign및 복잡한 Debug 과정이 없이 효과적으로 전자파 양립성 규격을 만족하였다.

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A Study on Repair of Scan Design Rule Violations at Clock and Reset Pins of Scan Cells (스캔셀의 Clock과 Reset핀에서의 스캔 설계 Rule Violations 방지를 위한 설계 변경)

  • Kim, In-Soo;Min, Hyoung-Bok
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.52 no.2
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    • pp.93-101
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    • 2003
  • Scan design is a structured design-for-testability technique in which flip-flops are re-designed so that the flip-flops are chained in shift registers. The scan design cannot be used in a design with scan design rule violations without modifying the design. The most important scan design rule is concerning clock and reset signals to pins of the flip-flops or scan cells. Clock and Reset pins of every scan cell must be controllable from top-level ports. We propose a new technique to re-design gated clocks and resets which violate the scan design rule concerning the clock and reset pins. This technique substitutes synchronous sequential circuits for gated clock and reset designs, which removes the clock and reset rule violations and improves fault coverage of the design. The fault coverage is improved from $90.48\%$ to $100.00\%$, from $92.31\%$ to $100.00\%$, from $95.45\%$ to $100.00\%$, from $97.50\%$ to $100.00\%$ in a design with gated clocks and resets.

EMC Design of Communication System on the Basis of EMC Design Rule (EMC Design Rule을 이용한 통신 System의 EMC Design)

  • 박학병;박종성;이승한;강석환
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.12 no.1
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    • pp.77-83
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    • 2001
  • We analyzed the mechanism of EM emission in telecommunication system and extracted the dominant parameter in EMC design. The I/O cable, ventilation hole and shield design of chassis are important EMC design Issues in telecommunication systems. Because telecommunication systems have much more I/O cables than other electronic products, EMC design of I/O cable is very important in telecommunication systems. Therefore by the method of experimentation and simulation, EM coupling mechanism of I/O cable was analyzed and the design rule for low emission was extracted. On the base of these EMC design rules, EMC design of telecommunication system was executed without complex redesign or debug. The result obtained by these methods was shown in this paper.

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On a Balanced Classification Rule

  • Kim, Hea-Jung
    • Journal of the Korean Statistical Society
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    • v.24 no.2
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    • pp.453-470
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    • 1995
  • We describe a constrained optimal classification rule for the case when the prior probability of an observation belonging to one of the two populations is unknown. This is done by suggesting a balanced design for the classification experiment and constructing the optimal rule under the balanced design condition. The rule si characterized by a constrained minimization of total risk of misclassification; the constraint of the rule is constructed by the process of equation between Kullback-Leibler's directed divergence measures obtained from the two population conditional densities. The efficacy of the suggested rule is examined through two-group normal classification. This indicates that, in case little is known about the relative population sizes, dramatic gains in accuracy of classification result can be achieved.

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A Study of Combinative Index for Conflict Resolution (상충 해결을 위한 결합지수 연구)

  • 고희병;이수홍;이만호
    • Korean Journal of Computational Design and Engineering
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    • v.5 no.4
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    • pp.319-326
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    • 2000
  • Expert systems using uncertain and ambiguous knowledge are not of the recent interests about uncertainty problem for performing inference similar to the decision making of a human expert. Human factors on rule-based systems often involve uncertain information. Expert systems had been used the methods of conflict resolution in a rule conflict situation, but this methods not properly solved the rule conflict. If a human expert appends a new rule to an original rule base, the rule base rightly causes a rule conflict. In this paper, the problem of rule conflict is regarded as one in which uncertainty of information is fundamentally involved. In the reduction of problem with uncertainty, we propose an enhanced rule ordering method, which improve the rule ordering method using Dempster-Shafer theory. We also propose a combinative index, which involve human factors of experts decision making.

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Three-dimensional structural design based on cellular automata simulation

  • Kita, E.;Saito, H.;Tamaki, T.;Shimizu, H.;Xie, Y.M.
    • Structural Engineering and Mechanics
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    • v.23 no.1
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    • pp.29-42
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    • 2006
  • This paper describes the design scheme of the three-dimensional structures based on the concept of the cellular automata simulation. The cellular automata simulation is performed according to the local rule. In this paper, the local rule is derived in the mathematical formulation from the optimization problem. The cell density is taken as the design variable. Two objective functions are defined for reducing the total weight of the structure and obtaining the fully stressed structure. The constraint condition is defined for defining the local rule. The penalty function is defined from the objective functions and the constraint condition. Minimization of the penalty function with respect to the design parameter leads to the local rule. The derived rule is applied to the design of the three-dimensional structure first. The final structure can be obtained successfully. However, the computational cost is expensive. So, in order to reduce the computational cost, the material parameters $c_1$ and $c_2$ and the value of the cell rejection criterion (CRC) are changed. The results show that the computational cost depends on the parameters and the CRC value.

Implementation of Design Rule Checker for IP Design (IP 설계를 위한 설계규칙 검사기 구현)

  • 백영석;배영환;조한진
    • Proceedings of the IEEK Conference
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    • pp.172-175
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    • 2000
  • In this paper, we address the requirement of VHDL parser for design rule checker, and the structure and implementing method of design rule checker which checks if IP design is valuable to reuse. This checker builds the grammar trees from the design rules, and the internal graphs representation from IP design data. It maps the nodes of the grammar trees and the internal graphs to check if it violates the design rules. The design rule checker can do the cross reference between source codes and error messages to find error position easy.

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Reliability based calibration of the capacity design rule of reinforced concrete beam-column joints

  • Thomos, George C.;Trezos, Constantin G.
    • Computers and Concrete
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    • v.8 no.6
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    • pp.631-645
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    • 2011
  • The capacity design rule for beam-column joints, as adopted by the EC8, forces the formation of the plastic hinges to be developed in beams rather than in columns. This is achieved by deriving the design moments of the columns of a joint from equilibrium conditions, assuming that plastic hinges with their possible overstrengths have been developed in the adjacent beams of the joint. In this equilibrium the parameters (dimensions, material properties, axial forces etc) are, in general, random variables. Hence, the capacity design is associated with a probability of non-compliance (probability of failure). In the present study the probability of non-compliance of the capacity design rule of joints is being calculated by assuming the basic variables as random variables. Parameters affecting this probability are examined and a modification of the capacity design rule for beam-column joints is proposed, in order to achieve uniformity of the safety level.

Fuzzy Multi-Layer Relational Design for the explosive rule-based applications (폭발적인크기의 룰-기반의 응용을 위한 멀티 레이어 퍼어지 관계 설계)

  • Kim, Young Taek
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.343-346
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    • 2012
  • There are many realistic system necessities on the huge size of rule matrices with any Fuzzy Logical Inferences. This paper indicates the experimental design policy on the PCS design for the Platoon and AOS for the social application with some identical resemblances in between them so that we could use a design for two different usages feasibly.

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Active Rule Manager for the Mobile Agent Middleware System

  • Lee, Yon-Sik;Cheon, Eun-Hong
    • Journal of the Korea Society of Computer and Information
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    • v.21 no.10
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    • pp.99-105
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    • 2016
  • The active rule system is a key element of the rule-based mobile agent middleware system for activeness and autonomy of the sensor network. The rule manager, which is the main components of active rule based mobile agent framework and active rule system, performs the control and management of the rule-related processes. In this paper, we design and implement the roles and functions of the rule manager in detail. The proposed rule manager plays an important role in the sensor network environment. The sensor data server loads the active rule on the mobile agent by the rule manager according to the situations, and the mobile agent migrates to the destination node and performs the designated action. This active rule-based mobile agent middleware system presents the usefulness for the various sensor network applications. Through the rule execution experiment using the rule-based mobile agent, we show the adaptability and applicability of rule-based mobile agent middleware system to the dynamic environmental changes in sensor networks.