Dynamic Binding of Features and Solid Modelers

1993 ◽  
Author(s):  
Jami J. Shah ◽  
Viren Pherwani
Keyword(s):  
Geometric Modeling ◽  
Object Oriented ◽  
The Other ◽  
Dynamic Binding ◽  
Communication Architecture ◽  
X Window ◽  
Feature Based

Abstract The work described in this paper investigates the feasibility of standardizing communications between geometric modeling core systems and generic feature-based applications. Since geometric modelers differ in the functionality they provide and feature applications vary in the level of geometric operations they can support internally, a multi-layered communication architecture is proposed. The methodology is analogous to the X-Window standard for graphics. At the lowest level is a library of functions named Geo-lib, which are translated into geometric modeler specific commands. If there was to be a future dynamic interfacing standard, such as STEP-SDAI, these specific calls could be replaced by standard calls, analogous to Geo-Protocol. At the next layer is a library, called Geo-widgets, which are written entirely using Geo-lib functions. At the highest level Geo-Tools, functions used commonly by generic applications. Feature applications can choose to use the library at any level, as necessary. This multi-layered geometric toolkit creates a seamless object oriented bond between the feature application and the geometric modeling core, in such a way that either one could be replaced without requiring any changes to the other.

scholarly journals Micromagnetic Simulations of Fe and Ni Nanodot Arrays Surrounded by Magnetic or Non-Magnetic Matrices

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 349
Author(s):  
Devika Sudsom ◽  
Andrea Ehrmann
Keyword(s):  
Magnetic Materials ◽  
Data Storage ◽  
Magnetization Reversal ◽  
Hysteresis Loops ◽  
Object Oriented ◽  
Basic Research ◽  
Memory Systems ◽  
The Other ◽  
Micromagnetic Simulations ◽  
Nanodot Arrays

Combining clusters of magnetic materials with a matrix of other magnetic materials is very interesting for basic research because new, possibly technologically applicable magnetic properties or magnetization reversal processes may be found. Here we report on different arrays combining iron and nickel, for example, by surrounding circular nanodots of one material with a matrix of the other or by combining iron and nickel nanodots in air. Micromagnetic simulations were performed using the OOMMF (Object Oriented MicroMagnetic Framework). Our results show that magnetization reversal processes are strongly influenced by neighboring nanodots and the magnetic matrix by which the nanodots are surrounded, respectively, which becomes macroscopically visible by several steps along the slopes of the hysteresis loops. Such material combinations allow for preparing quaternary memory systems, and are thus highly relevant for applications in data storage and processing.

Development of a feature-based and object-oriented concurrent engineering system

1994 ◽  
Vol 5 (1) ◽  
pp. 23-31 ◽  
Author(s):  
C. Chen ◽  
F. Swift ◽  
S. Lee ◽  
R. Ege ◽  
Q. Shen
Keyword(s):  
Concurrent Engineering ◽  
Object Oriented ◽  
Engineering System ◽  
Feature Based

The Shortest Path Algorithm Dynamic Visualization Realization

2013 ◽  
Vol 694-697 ◽  
pp. 2291-2294
Author(s):  
Xiao Bo Yang ◽  
Bang Ze Chen
Keyword(s):  
Shortest Path ◽  
Implementation Process ◽  
Object Oriented ◽  
Visual Image ◽  
The Other ◽  
Dynamic Visualization ◽  
Object Oriented Method ◽  
Shortest Path Algorithm ◽  
Source Point ◽  
The Right

By using object oriented method design graph vertices into class, and in this foundation to increase visual member, realize from the source point to the other vertex of the shortest path algorithm of dynamic visualization. Around the two sync window animation, the left window with thick lines drawn through the vertices and edges, " revealed the source point to the other vertex of the shortest path " list box display shortest path sequence and path length, the right window demonstration algorithm dynamic implementation process, and in the " S " text box to display the current most find shortest path vertices. The system has friendly interface, visual image.

A Knowledge-Based System for Machining Operation Planning in Feature Based, Open-Architecture Manufacturing

1996 ◽  
Author(s):  
James A. Stori ◽  
Paul K. Wright
Keyword(s):  
Machine Tool ◽  
Tool Path ◽  
Integrated Design ◽  
Object Oriented ◽  
Planning System ◽  
Open Architecture ◽  
Operation Planning ◽  
Trade Offs ◽  
Feature Based ◽  
Machining Parameter

Abstract Within the Integrated Design And Manufacturing Environment (IMADE), operation planning provides a mapping from geometric design primitives to machining operation sequences for manufacturing processes. Operation planning includes tool selection, machining parameter selection, and tool path generation. An object oriented approach to program structure is adopted, whereby features, operations and tools, inherit behaviors and attributes from the appropriate class-hierarchies for the part, the manufacturing operations, and tooling classes. A detailed example is presented illustrating the operation planning search algorithm. Scripts are generated by the individual machining operations for execution on a machine tool. Tooling information is maintained in an object-oriented database through the FAR libraries for Common LISP. Examples of particular process plans show that the inherent trade-offs between specified precision and machining time can be investigated. An Open Architecture Machine Tool (MOSAIC-PM) has been used to machine the parts created by the feature based design and planning system. The novel contributions of this paper relate to the demonstration of “seamless” links between, a) design, b) planning, and c) actual fabrication by milling.

scholarly journals Monocular mechanisms determine plaid motion coherence

1996 ◽  
Vol 13 (4) ◽  
pp. 615-626 ◽  
Author(s):  
David Alais ◽  
Maarten J. van der Smagt ◽  
Frans A. J. Verstraten ◽  
W. A. van de Grind
Keyword(s):  
Cortical Area ◽  
The Other ◽  
Coherent Motion ◽  
Spatial Period ◽  
Two Dimensional ◽  
Middle Temporal ◽  
Spatial Frequencies ◽  
Motion Coherence ◽  
Plaid Motion ◽  
Feature Based

AbstractAlthough the neural location of the plaid motion coherence process is not precisely known, the middle temporal (MT) cortical area has been proposed as a likely candidate. This claim rests largely on the neurophysiological findings showing that in response to plaid stimuli, a subgroup of cells in area MT responds to the pattern direction, whereas cells in area V1 respond only to the directions of the component gratings. In Experiment 1, we report that the coherent motion of a plaid pattern can be completely abolished following adaptation to a grating which moves in the plaid direction and has the same spatial period as the plaid features (the so-called “blobs”). Interestingly, we find this phenomenon is monocular: monocular adaptation destroys plaid coherence in the exposed eye but leaves it unaffected in the other eye. Experiment 2 demonstrates that adaptation to a purely binocular (dichoptic) grating does not affect perceived plaid coherence. These data suggest several conclusions: (1) that the mechanism determining plaid coherence responds to the motion of plaid features, (2) that the coherence mechanism is monocular, and thus (3), that it is probably located at a relatively low level in the visual system and peripherally to the binocular mechanisms commonly presumed to underlie two-dimensional (2-D) motion perception. Experiment 3 examines the spatial tuning of the monocular coherence mechanism and our results suggest it is broadly tuned with a preference for lower spatial frequencies. In Experiment 4, we examine whether perceived plaid direction is determined by the motion of the grating components or the features. Our data strongly support a feature-based model.

scholarly journals C. S. Peirce on the dynamic object of a sign: From ontology to semiotics and back

2015 ◽  
Vol 43 (4) ◽  
pp. 419-437
Author(s):  
Helmut Pape
Keyword(s):  
Object Oriented ◽  
The Other ◽  
Dynamic Object ◽  
Contingent Identity ◽  
Process Ontology ◽  
Relational Properties ◽  
Other Hand ◽  
Structural Account ◽  
Real Objects ◽  
Normative Role

That reality, and in particular the (dynamic) objects of signs, are independent of our thoughts or other representations is a crucial thesis of Peirce’s realism. On the other hand, his semiotics implies the claim that all reality and all real objects are real for us only because of the signs we use. Do these two claims contradict, even exclude, each other? I will argue that both Peirce’s metaphysics and his semiotics provide a natural via media: a structural account of the openness of processes, featuring transitive relations, connects process ontology implicit in his evolutionary metaphysics and the relational, quasi-inferential features embodied in interpretational sequences of signs. It is shown that Peirce’s notion of a sign, its normative role and his account of the directional force of objects implies a sort of logical causality that supports the unity of objects. In this way sign sequences are able to relate flexibly sign use with contextually specified independent objects. That is to say, relational properties of object-oriented chains of interpretations provide sign users with a flexible, fallibilistic instrument able to capture by contingent identity relations (teridentity) of the identity of objects in changing situations.Includes: Comment by Francesco Bellucci (pp. 433–437).

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