Property Integration—A New Approach for Simultaneous Solution of Process and Molecular Design Problems

2002 ◽  
pp. 79-84 ◽  
Author(s):  
Mario Richard Eden ◽  
Sten Bay Jørgensen ◽  
Rafiqul Gani ◽  
Mahmoud El-Halwagi
Keyword(s):  
Molecular Design ◽  
Simultaneous Solution ◽  
Design Problems ◽  
New Approach ◽  
Property Integration

scholarly journals An algebraic approach for simultaneous solution of process and molecular design problems

2010 ◽  
Vol 27 (3) ◽  
pp. 441-450 ◽  
Author(s):  
S. Bommareddy ◽  
N. G. Chemmangattuvalappil ◽  
C. C. Solvason ◽  
M. R. Eden
Keyword(s):  
Molecular Design ◽  
Algebraic Approach ◽  
Simultaneous Solution ◽  
Design Problems

Simultaneous solution of process and molecular design problems using an algebraic approach

2010 ◽  
Vol 34 (9) ◽  
pp. 1481-1486 ◽  
Author(s):  
Susilpa Bommareddy ◽  
Nishanth G. Chemmangattuvalappil ◽  
Charles C. Solvason ◽  
Mario R. Eden
Keyword(s):  
Molecular Design ◽  
Algebraic Approach ◽  
Simultaneous Solution ◽  
Design Problems

scholarly journals Approximation of the index for assessing ship sea-keeping performance on the basis of ship design parameters

2007 ◽  
Vol 14 (3) ◽  
pp. 21-26 ◽  
Author(s):  
Tomasz Cepowski
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Ship Design ◽  
Design Parameters ◽  
Preliminary Design ◽  
Operational Effectiveness ◽  
Design Problems ◽  
New Approach ◽  
Analytical Functions ◽  
Effectiveness Index

Approximation of the index for assessing ship sea-keeping performance on the basis of ship design parameters This paper presents a new approach which makes it possible to take into account seakeeping qualities of ship in the preliminary stage of its design. The presented concept is based on representing ship's behaviour in waves by means of the so called operational effectiveness index. Presented values of the index were calculated for a broad range of design parameters. On this basis were elaborated analytical functions which approximate the index depending on ship design parameters. Also, example approximations of the index calculated by using artificial neural networks, are attached. The presented approach may find application to ship preliminary design problems as well as in ship service stage to assess sea-keeping performance of a ship before its departure to sea.

Indexing and retrieval of cases in a case-based design system

1996 ◽  
Vol 10 (1) ◽  
pp. 47-63 ◽  
Author(s):  
B. Raphael ◽  
B. Kumar
Keyword(s):  
Structural Design ◽  
Design Methods ◽  
Design System ◽  
Prototype System ◽  
Design Problems ◽  
New Approach ◽  
Indexing And Retrieval ◽  
Control Knowledge ◽  
Case Based

AbstractThis paper discusses the issues related to retrieval of cases in a case-based design system. The limitations of the conventional approaches are brought out, and this is followed by a description of a new approach to indexing and retrieval. This approach aims at capturing control knowledge required for retrieval from individual retrieval examples. Since this approach is based on past retrieval examples, we call it RBEX (Retrieval Based on EXamples). The proposed approach is implemented in a prototype system called CADREM. CADREM uses design methods used in solving past design problems to solve new problems. This is closer to the derivational analogy approach rather than the more common transformational analogy. CADREM has been tried in the domain of conceptual structural design of buildings. Sample outputs from CADREM are also included.

scholarly journals A PRODUCT DEVELOPMENT APPROACH TO TEACHING INTRODUCTORY ENGINEERING DESIGN

2011 ◽  
Author(s):  
L. M. Lye ◽  
A. D. Fisher
Keyword(s):  
Engineering Design ◽  
Just In Time ◽  
First Year ◽  
Design Problems ◽  
New Approach ◽  
Approach To Teaching ◽  
Development Approach ◽  
Business Engineering ◽  
Realization Process ◽  
Product Realization

This paper describes a new approach to teaching first year design at Memorial University. Students are introduced to engineering design using the product realization process (PRP) as a platform. The course integrates the business, engineering design, and prototyping functions of the PRP. The just-in-time structured delivery of background tools and theory complement the relatively unstructured nature of the design problems. Lab exercises are used to intoduce the basic practicalities of mechanical, electrical and electronic design. Projects are completed in teams with emphasis placed on teamwork, project management and communication skills. Student enthusiasm has been very high and this aides significantly in the learning process.

Linear and Non-Linear Optical Properties of (2-Cyano-5-Methoxy-1,4-Phenylenevinylene) and Paraphenylenevinylene Copolymers

1992 ◽  
Vol 277 ◽  
Author(s):  
Jang-Joo Kim ◽  
Do-Hoon Hwang ◽  
Shin-Woong Kang ◽  
Hong-Ku Shim
Keyword(s):  
Optical Properties ◽  
Molecular Design ◽  
Water Soluble ◽  
New Approach ◽  
Electro Optic ◽  
Precursor Polymers ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Precursor Route ◽  
Linear Optical

ABSTRACTPoly(CMPV-co-PV) have been synthesized via water soluble sulfonium salt precursor route and their linear and non-linear optical properties were characterized. The electro-optic response was stable up to 100°C when the materials were poled during the elimination. The thermal stability and mechanical strength of PPV and its derivatives, and easy processibility from the precursor polymers suggest a new approach for the molecular design of the 2nd order non-linear optical polymers.

Design and Analysis of Momentary-Dwell Mechanisms

1985 ◽  
Vol 107 (1) ◽  
pp. 131-140 ◽  
Author(s):  
A. C. Wang ◽  
T. W. Lee
Keyword(s):  
The Other ◽  
Heuristic Optimization ◽  
Simultaneous Solution ◽  
Design Problems ◽  
Chain Dynamics ◽  
Kinematic Synthesis ◽  
Displacement Equation ◽  
A Chain ◽  
General Synthesis ◽  
Synthesis Approach

This paper presents a general theory for the dwell characteristics and for the synthesis of momentary-dwell mechanisms. Dwell conditions are obtained from the simultaneous solution of a set of equations derived recursively through the differentiations of a general form of displacement equation. A general synthesis approach is presented. It involves the use of analytical solutions of the lower-order dwell criteria as initial estimates and the development of a computer-aided procedure to subsequently readjust the mechanism proportions by heuristic optimization. The proportions thus obtained represent tradeoffs among higher orders of dwell and various prescribed kinematic and dynamic characteristics. For most practical purposes, such a solution is useful and acceptable. The coupler-dwell mechanism is used to illustrate the theory and approach. In particular, two mechanisms design problems are investigated. One deals with the kinematic synthesis of a six-bar coupler mechanism with shockless dwell and with prescribed unlimited crank rotations as well as optimum transmission; and the other concerns the design of a chain-linkage drive, including an analysis on the effect of the chain dynamics.

Mechanization of spatial reasoning for automatic pipe layout design

1991 ◽  
Vol 5 (1) ◽  
pp. 1-20 ◽  
Author(s):  
David Zhu ◽  
Jean-Claude Latombe
Keyword(s):  
Motion Planning ◽  
Spatial Reasoning ◽  
Layout Design ◽  
Planning Techniques ◽  
Design Problems ◽  
New Approach ◽  
Left Behind ◽  
Rigid Objects ◽  
Symbolic Reasoning ◽  
High Level

Artificial Intelligence has been very active in developing high-level symbolic reasoning paradigms that have resulted in practical expert systems. However, with a few exceptions, it has paid little attention to the automation of spatial reasoning. On the other hand, spatial reasoning has attracted the interest of several researchers in Robotics. One of the important problems that have been investigated is motion planning, and very significant results have been obtained. This paper describes an implemented system for designing pipe layouts automatically using motion planning techniques. It introduces a new approach to pipe layout design automation in which pipe routes are treated as trajectories left behind by rigid objects (‘robots’). We have implemented this approach in a basic Pipe Router that is described in detail in this paper. We have extended this router in order to make it capable of treating a variety of other constraints which are typical of practical pipe layout design problems. These constraints relate to the process carried out in the pipes, to the design of their mechanical support, and to the constructability and the ease of operation and maintenance of the designed pipe systems.

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