Design for Manufacturability via Agent Interaction

1996 ◽  
Author(s):  
H. Robert Frost ◽  
Mark R. Cutkosky
Keyword(s):  
Design For Manufacturability ◽  
The Internet ◽  
Manufacturing Processes ◽  
Design Rules ◽  
On Demand ◽  
Design And Manufacturing ◽  
Agent Interaction ◽  
Procedural Code ◽  
Feature Based ◽  
Deposition Processes

Abstract We describe an approach for making the capability of manufacturing processes manifest to designers starting with the earliest stages of geometry specification. The approach involves a dialogue among design and manufacturing agents over the Internet. The dialogue focuses on the specification and exchange of process capability models for establishing “design rules on-demand” to ensure manufacturability. The models include both declarative knowledge and, for those aspects of the process that are difficult to represent declaratively, platform-independent procedural code which is automatically loaded onto the designers’ machines. The approach is being implemented using agents, written in the Java2 language, which exchange feature-based capability models. The approach is being tested initially on machining and shape-deposition processes.

A Method for Extracting and Thickening a Mid-Surface of a 3D Thin Object Represented in NURBS

1997 ◽  
Vol 119 (4B) ◽  
pp. 706-712 ◽  
Author(s):  
A. Fischer ◽  
K. K. Wang
Keyword(s):  
Data Transfer ◽  
Die Casting ◽  
Manufacturing Processes ◽  
Concurrent Design ◽  
Engineering Analysis ◽  
Design And Manufacturing ◽  
Medial Surfaces ◽  
Cad Cam ◽  
Feature Based ◽  
Offset Surfaces

In analyses of manufacturing processes such as injection molding of plastics or die casting of metals, the geometry of a typical 3D thin-walled structure is usually represented by an aggregation of mid-surfaces. This geometric simplification associated with assigned part thicknesses significantly reduces the computational complexity in engineering analysis (e.g., flow and solidification simulations). On the other hand, it complicates data transfer from and back to any CAD/CAM system in which objects are not represented by their mid-surfaces. As a part of an overall effort to develop a feature-based system for concurrent design and manufacturing of complex thin parts, a new algorithm has been developed for representing both the objects and their mid-surfaces. This algorithm can extract a mid-surface representation from a complex 3D thin object and then reconstruct the object from the modified mid-surface according to the analysis results. The objects consist of sculptured features with tubular topology and are represented by NURBS. The proposed method is based on offsetting techniques and deals directly with the control polygons of the object boundaries and of the mid-surfaces. The algorithms are based on offsetting techniques since there is a high correlation between medial surfaces and offset surfaces. In the case of swept features, simplification is achieved by using 2D rather than 3D techniques.

scholarly journals 3D Digitization and Additive Manufacturing Technologies in Medicine

2018 ◽  
Vol 26 (42) ◽  
pp. 165-170
Author(s):  
Ivan Molnár ◽  
Ladislav Morovič
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Processes ◽  
Design And Manufacturing ◽  
Medical Aids ◽  
Manufacturing Methods ◽  
Manufacturing Technologies ◽  
Design And Manufacture ◽  
3D Digitization ◽  
The Given

Abstract The paper discusses the use of 3D digitization and additive manufacturing technologies in the field of medicine. In addition, applications of the use of 3D digitization and additive manufacturing methods are described, focusing on the design and manufacture of individual medical aids. Subsequently, the process of designing and manufacturing of orthopedic aids using these technologies is described and the advantages of introducing the given technologies into the design and manufacturing processes in the medicine sector are presented.

scholarly journals E-HAILING SERVICES IN MALAYSIA: CURRENT PRACTICES AND FUTURE OUTLOOK

2020 ◽  
Vol 18 (13) ◽  
Author(s):  
Ahmad Sahir Jais ◽  
Azizan Marzuki
Keyword(s):  
Public Transportation ◽  
Transportation Network ◽  
Positive Sign ◽  
The Internet ◽  
Domestic Economy ◽  
Inclusion Criteria ◽  
On Demand ◽  
Public Transportation System ◽  
Growth Projection ◽  
The Government

E-hailing services are known to be on-demand vehicle acquisition that relies on network dependency and use of a specific digital application through the Internet. The objectives of this study were to investigate the adoption of e-hailing services from the initial inception, issues in adoption and the direction of e-hailing services within the context of Malaysia. A Systematic Literature Review (SLR) related to the e-hailing industry was used by employing the inclusion criteria of keywords generated from the literature data pool. The legalisation of e-hailing services in Malaysia had spurred the growth of the industry. With the establishment of the Transportation Network Company, which was a positive sign for e-hailing to continue to flourish, the industry was considered as a complement to the existing public transportation system. The growth projection showed that e-hailing services will continue to be part of the Malaysian transportation sectors and would remain competitive in contributing to the domestic economy. However, some barriers would deter the progress of e-hailing services, such as over-regulation by the government.

scholarly journals A Feature-Based Forensic Procedure for Splicing Forgeries Detection

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Irene Amerini ◽  
Rudy Becarelli ◽  
Roberto Caldelli ◽  
Matteo Casini
Keyword(s):  
Image Forensics ◽  
Experimental Results ◽  
Real Case ◽  
The Internet ◽  
Image Search ◽  
Feature Based ◽  
Feature Match ◽  
The Web

Nowadays, determining if an image appeared somewhere on the web or in a magazine or is authentic or not has become crucial. Image forensics methods based on features have demonstrated so far to be very effective in detecting forgeries in which a portion of an image is cloned somewhere else onto the same image. Anyway such techniques cannot be adopted to deal with splicing attack, that is, when the image portion comes from another picture that then, usually, is not available anymore for an operation of feature match. In this paper, a procedure in which these techniques could also be employed will be shown to get rid of splicing attack by resorting to the use of some repositories of images available on the Internet like Google Images or TinEye Reverse Image Search. Experimental results are presented on some real case images retrieved on the Internet to demonstrate the capacity of the proposed procedure.

An Innovative Synthetic Mooring Solution for an Octagonal FPSO in Shallow Waters

2010 ◽  
Author(s):  
Mo Fan ◽  
Da Li ◽  
Tuanjie Liu ◽  
Alex Ran ◽  
Wei Ye
Keyword(s):  
Oil And Gas ◽  
Shallow Waters ◽  
Manufacturing Processes ◽  
Mooring System ◽  
Oil And Gas Development ◽  
Mooring Lines ◽  
Environmental Loads ◽  
Design And Manufacturing ◽  
Full Production ◽  
Three Bundles

An octagonal FPSO has been proposed for marginal oil and gas development in shallow waters. A shuttle tanker will be deployed near the FPSO during offloading operations. This new concept simplifies the design and manufacturing processes, yet maintains full production, storage, and offloading functions of a conventional ship-shaped FPSO. However, design of the mooring system for this floating unit imposes technical challenges due to: 1) high environmental loads expected on this unit, 2) large dynamic offsets of the unit in shallow waters, and 3) inadequate performance of catenary mooring systems in shallow waters. Thus, development of a viable station keeping solution becomes a key issue to the new concept FPSO design. In this paper, an innovative mooring system is designed to meet the challenges. The FPSO mooring system consists of pile anchors, bridle chains, anchorage buoys, and polyester ropes. Nine mooring lines are grouped into three bundles which evenly spread around the FPSO. The shuttle tanker is attached to the FPSO with a nylon rope hawser at the bow and secured to pre-installed anchorage buoys at the stern with two other nylon ropes. Analyses have been performed for the FPSO mooring system. It is concluded that the proposed mooring system is fully functional and effective.

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