• Title/Summary/Keyword: reverse design

Search Result 790, Processing Time 0.028 seconds

Analysis and Process Design of Hot Pipe Bending Process With Small Bending Radius (작은 곡률반경 파이프 벤딩을 위한 열간 파이프 벤딩공정 해석 및 설계)

  • 류경희;김동진;김병민;이동주
    • Transactions of Materials Processing
    • /
    • v.10 no.4
    • /
    • pp.329-337
    • /
    • 2001
  • The finite element simulation model and the program to calculate the reverse moment have been developed to analyse the stress state and deformation of pipe bending using local induction heating with small bending radius in this study. The reverse moment that is to be applied on the bending arm to control the wall thinning ratio of the bending outside to within a particular value. Even though the demand of pipes with small bending radius is increasing in power plants and ship buildings, the welded elbows are still widely used. The bending process with or without a reverse moment acting on the bending arm has been simulated. The reverse moments calculated from the developed program are in good agreement with the finite element simulations and the experiments.

  • PDF

Performance Evaluation of Access Channel Slot Acquisition in Cellular DS/CDMA Reverse Link

  • Kang, Bub-Joo;Han, Young-Nam
    • ETRI Journal
    • /
    • v.20 no.1
    • /
    • pp.16-27
    • /
    • 1998
  • In this paper, we consider the acquisition performance of an IS-95 reverse link access channel slot as a function of system design parameters such as postdetection integration length and the number of access channel message block repetitons. The uncertainty region of the reverse link spreading codes compared to that of forward link is very small, since the uncertainty region of the reverse link is determined by a cell radius. Thus, the parallel acquisiton technique in the reverse link is more efficient than a serial acquisition technique in terms of implementation and of acquisition time. The parallel acquisition is achieved by a bank of N parallel I/Q noncoherent correlator are analyzed for band-limited noise and the Rayleigh fast fading channel. The detection probability is derived for multiple correct code-phase offsets and multipath fading. The probability of no message error is derived when rake combining, access channel message block combining, and Viterbi decoding are applied. Numerical results provide the acquisition performance for system design parameters such as postdetection integration length and number of access channel message block repetitions in case of a random access on a mobile station.

  • PDF

Recent Updates Regarding Outcomes and Complications of Reverse Total Shoulder Arthroplasty

  • Chung, Seok Won
    • Clinics in Shoulder and Elbow
    • /
    • v.20 no.3
    • /
    • pp.172-179
    • /
    • 2017
  • Indications of reverse total shoulder arthroplasty (RTSA) have been consistently extended by technical advancements in reverse arthroplasty prosthesis, continuous development of the implants, accumulated experiences and its successful treatment outcomes; accordingly, its use has rapidly increased. RTSA has been performed for a variety of indications, with variable outcomes depending on the initial diagnosis. However, controversial opinions still exist regarding the design of reverse arthroplasty prosthesis (medialized or lateralized design and the neck-shaft angle of the humeral prosthesis), suture of the subscapularis tendon, use of cement during placement of the humeral prosthesis, and surgical procedures; therefore, these should be investigated so that they can be better understood.

FORE: A Form-Driven Object-Oriented Reverse Engineering Methodology (업무 양식에 근거한 객체 지향 역공학 방법론)

  • Yoo, Cheon-Soo;Lee, Hee-Seok
    • Asia pacific journal of information systems
    • /
    • v.9 no.1
    • /
    • pp.115-142
    • /
    • 1999
  • Legacy applications are valuable assets that should be integrated into next generation business systems. To gain this advantage, progressive companies can reverse engineer the legacy business operations. This paper presents a form-driven object-oriented reverse engineering(FORE) methodology by the use of business forms to recover semantics of legacy applications. They retain the user-oriented contents of business and thus are easily understandable. Our form driven object-oriented reverse engineering methodology consists of five phases: form and usage analysis, form object slicing, object structure modeling, scenario design, and model integration. Knowledge about form structure and user interaction with legacy applications is used to capture the design semantics. An object model, which consists of an object structure model and scenario results from such form knowledge. The resulting object model is more likely to help reverse engineers understand and reuse legacy systems.

  • PDF

Component-Based Software Architecture for Biosystem Reverse Engineering

  • Lee, Do-Heon
    • Biotechnology and Bioprocess Engineering:BBE
    • /
    • v.10 no.5
    • /
    • pp.400-407
    • /
    • 2005
  • Reverse engineering is defined as the process where the internal structures and dynamics of a given system are inferred and analyzed from external observations and relevant knowledge. The first part of this paper surveys existing techniques for biosystem reverse engineering. Network structure inference techniques such as Correlation Matrix Construction (CMC), Boolean network and Bayesian network-based methods are explained. After the numeric and logical simulation techniques are briefly described, several representative working software tools were introduced. The second part presents our component-based software architecture for biosystem reverse engineering. After three design principles are established, a loosely coupled federation architecture consisting of 11 autonomous components is proposed along with their respective functions.

A Structural Analysis of the Complex Implements of an Agricultural Tractor using Reverse Design (역설계를 통한 트랙터 복합작업기 강도분석)

  • Lee, Choong-Ho
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.18 no.5
    • /
    • pp.82-89
    • /
    • 2019
  • This study is a structural analysis of the major components of the implements for an agricultural tractor. To develop an unpowered high-speed implement of an agricultural tractor, the modeling and analysis of the benchmarking product was calculated using 3D scanning and reverse design technologies. The tractive load was calculated using the powertrain efficiencies and soil-propelling force, which were estimated by analyzing the main frame, disc, frames, and chisel plow for the axial loading condition. The final goal of this research is to establish the design parameters and assembly technology for securing disc harrow structures and durability of life. This information will be used to analyze the new model design for domestic consumption.

Topology Optimization Using Digital Images (디지털 이미지를 이용한 위상최적설계)

  • Shin, Woon-Joo;Min, Seung-Jae
    • Korean Journal of Computational Design and Engineering
    • /
    • v.11 no.4
    • /
    • pp.265-272
    • /
    • 2006
  • For the design and analysis of 3D object featuring complexity and irregularity in shape, sectional digital images measured by an industrial CT scanner are employed to generate a finite element model with uniform voxels. The voxel model plays a key role in developing an integrated reverse engineering system including geometric modeling, simulation and optimization. Design examples applied to topology optimization show that the proposed approach can provide a remarkable reduction in time cost at the conceptual and detail design stages.

A implementation and evaluation of Rule-Based Reverse-Engineering Tool (규칙기반 역공학 도구의 구현 및 평가)

  • Bae Jin Young
    • Journal of the Korea Society of Computer and Information
    • /
    • v.9 no.3
    • /
    • pp.135-141
    • /
    • 2004
  • With the diversified and enlarged softwares, the issue of software maintenance became more complex and difficult and consequently, the cost of software maintenance took up the highest portion in the software life cycle. We design Reverse Engineering Tool for software restructuring environment to object-oriented system. We design Rule - Based Reverse - Engineering using Class Information. We allow the maintainer to use interactive query by using Prolog language. We use similarity formula, which is based on relationship between variables and functions, in class extraction and restructuring method in order to extract most appropriate class. The visibility of the extracted class can be identified automatically. Also, we allow the maintainer to use query by using logical language. So We can help the practical maintenance. Therefore, The purpose of this paper is to suggest reverse engineering tool and evaluation reverse engineering tool.

  • PDF

Development of a Reverse Engineering System for Stamping Die Manufacturing (자동차 금형 Reverse Engineering 을 위한 측정 및 분석 시스템 개발)

  • 김덕영;노상도;한형상;주영관;박진수
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2000.11a
    • /
    • pp.277-280
    • /
    • 2000
  • Reverse Engineering is a procedure where the results of engineering decisions in manufacturing is feedback to the design phase and the knowledge-base is generated from the process know-how to reduce the errors. Since it used to take lots of time and efforts to finalize the machining of dies out of the original CAD design especially for die spotting and try-outs, reverse engineering is important to improve the productivity and quality of the die manufacturing process. In this regard, we developed system to support reverse engineering in machining of stamping dies for auto-body production. They automatically generate the relevant MC programs for a CMM simply with the input of measuring points in CAD environments, and show the CAD model and the results of inspection simultaneously for the ease of comparison. They also help reduce the overall clearance between the lower and upper dies. Applying these systems to the machining process of stamping dies, we could improve the reliability of measuring and get the optimal compensation distance between the two dies. We also analyzed the expected benefits of the system in terms of savings in time and costs.

  • PDF