Photo-reproductive processes for copying architectural and engineering drawings first became common in the 1880s with the introduction of the blueprint. While processes on paper have become increasingly identifiable in recent years, those on cloth remain less familiar. Tracing cloth is a plain woven, heavily sized fabric used as a durable and translucent support for ink tracings. Because of its...

A crucial feature of evolving natural systems is parallelism. The simultaneous and distributed application of rules (governed by e.g. biochemistry) is generally considered as the preposition to build up complex structures. In this article, the potential of agent-based modelling equipped with a concurrent rewriting rule system for artificial evolution is investigated. The task given to the syste...

With the wide application of computers in various industries, Computer Aided Design (CAD) has become the measurement criteria for the development degree of national modernization of science and technology, as well as industrial modernization. CAD needs to perform information processing to whole process of product design, including geometric modeling, engineering drawing, calculation and analysi...

Visualization is crucial to the effective analysis of biological pathways. A poorly laid out pathway confuses the user, while a well laid out one improves the user s comprehension of the underlying biological phenomenon. We present a new, elegant algorithm for layout of biological signaling pathways. Our algorithm uses a force-directed layout scheme, taking into account directional and rectangu...

In the engineering database system, multiple versions of a design including engineering drawings should be managed efficiently. The paper proposes an extended spatial data structure for efficient management of multiversion engineering drawings. The R-tree is adapted as a basic data structure. The efficient mechanism to manage the difference between drawings is introduced to the R-tree to elimin...

This paper presents a novel approach for recognizing and interpreting dimensions in engineering drawings. It starts by detecting potential dimension frames, each comprising only the line and text components of a dimension, then verifies them by detecting the dimension symbols. By removing the prerequisite of symbol recognition from detection of dimension sets, our method is capable of handling ...

This paper presents a new approach for reconstructing solids with planar, quadric and toroidal surfaces from three-view engineering drawings. By applying geometric theory to 3-D reconstruction, our method is able to remove restrictions placed on the axes of curved surfaces by existing methods. The main feature of our algorithm is that it combines the geometric properties of conics with af®ne pr...

Sketching is an activity that takes place throughout the engineering design process, and is often linked to design cognition. This preliminary study identifies different skills that contribute to a designer’s sketching ability and explores how those skills might be related to sketch fluency and design outcome. A positive correlation was found between the quantity of sketches produced and sketch...

Abstract In this article the group of packages collectively referred to as pstricks is extended with a package which adds the ability to generate electronic circuit diagrams. These diagrams follow standard conventions in engineering and can be particularly handy when it comes to simple construction of circuit diagrams for publication, without having to come to grips with vector drawing programs.