An Approach for Measuring Information Content of Textual Engineering Requirements Using a Form-Neutral Representation

2014 ◽  
Author(s):  
Chiradeep Sen ◽  
Alolika Mukhopadhyay ◽  
John Fields ◽  
Farhad Ameri
Keyword(s):  
Content Analysis ◽  
Natural Language ◽  
Engineering Design ◽  
Information Content ◽  
Mechanical Design ◽  
Ordinal Scale ◽  
Design Engineering ◽  
Design Requirements ◽  
Design Documents ◽  
Representation Formalism

This paper demonstrates a generic approach for measuring the information content of artifacts produced and used in early stages of mechanical design. Engineering design requirements are selected for information content analysis for illustration. In this method, requirements in natural language are translated to an Entity-Relation-Attribute-Value (ERAV) model composed of well-defined elements. A protocol for this translation is proposed and validated. Four different metrics, based on raw element count, count weighted by arbitrary ordinal scale, count weighted by node cardinality, and Shannon’s entropy are then applied to the ERAV model for measuring information content. The method proposed is generic enough to be applied to most design documents that use natural language as the knowledge representation formalism.

Virtual Reality Promises New Design Capabilities

1994 ◽  
Author(s):  
Angela Trego ◽  
Spencer Magleby
Keyword(s):  
Virtual Reality ◽  
Engineering Design ◽  
Design Process ◽  
Mechanical Design ◽  
Design Engineering ◽  
Cad Systems ◽  
The Past ◽  
Engineering Design Process ◽  
Potential Applications ◽  
Computer Based

Abstract Virtual reality has received much attention in the past few years in relation to entertainment and simulation. Although there is much hype surrounding virtual reality, the underlying technologies and concepts could have a significant impact on computer-based design engineering tools. This paper explores the possible applications of virtual reality to the engineering design process. The objective of the described research is to explore opportunities to create tools, environments, and systems which will increase the designer’s productivity through the application of virtual reality (VR) technologies and concepts. Background on design, CAD and VR is presented to give a context for later proposals. Previous research in the application of VR to CAD is reviewed. Specific VR capabilities are presented to show their possible application in mechanical design and CAD systems specifically. The potential applications of VR are explored in a structured manner with examples for each category. The paper concludes with recommendations on further research and development directions.

Topological Information Content and Expressiveness of Function Models in Mechanical Design

2009 ◽  
Author(s):  
Chiradeep Sen ◽  
Benjamin W. Caldwell ◽  
Joshua D. Summers ◽  
Gregory M. Mocko
Keyword(s):  
Engineering Design ◽  
Information Content ◽  
Model Comparison ◽  
Graphical Representation ◽  
Mechanical Design ◽  
Unconditional Probability ◽  
Function Model ◽  
Topological Information ◽  
Grammar Rules ◽  
Function Models

In this paper, two approaches for computing the topological information content of function models in mechanical engineering design are developed and compared. Previously a metric for computing information content of functions and flows within function models was proposed. Here this metric is adapted to compute the information contained in the resulting connections of flows between functions in a function model. The first approach is based on uniform unconditional probability of a flow connecting any two functions within the model. The second approach is based on additional knowledge that the functions and flows in a model have limited compatibility, thereby reducing the choices for origin and destination functions for each flow. This additional knowledge is represented using a new graphical representation supported by syntactical grammar rules. Both approaches are then applied to an example function model. Comparison between the approaches shows that the inclusion of compatibility knowledge increases the expressiveness of function representations and reduces the uncertainty of function models.

scholarly journals Fabrication of compliant mechanisms on the mesoscale

2011 ◽  
Vol 2 (1) ◽  
pp. 129-137 ◽  
Author(s):  
G. R. Hayes ◽  
M. I. Frecker ◽  
J. H. Adair
Keyword(s):  
Engineering Design ◽  
Mechanical Engineering ◽  
Materials Science ◽  
Compliant Mechanisms ◽  
Mechanical Design ◽  
Fabrication Process ◽  
Forming Process ◽  
Science And Engineering ◽  
Materials Science And Engineering ◽  
Design Requirements

Abstract. The fabrication of compliant mechanisms on the mesoscale requires collaboration of mechanical engineering design, with materials science and engineering fabrication approaches. In this paper, a review of current fabrication approaches to produce mesoscale devices is given, highlighting the benefits and limitations of each technique. Additionally, a hierarchy is provided, eliminating fabrication techniques that do not completely satisfy the mechanical design requirements of the compliant mechanisms. Furthermore, the lost mold-rapid infiltration forming process (LM-RIF) is described, and compared to existing fabrication approaches. Finally, prototype mesoscale compliant mechanisms are fabricated, demonstrating the versatility of the LM-RIF process to produce both metal and ceramic devices, as well as ability of a fabrication process to work in collaboration with mechanical design.

Topological Information Content and Expressiveness of Function Models in Mechanical Design

2010 ◽  
Vol 10 (3) ◽  
Author(s):  
Chiradeep Sen ◽  
Joshua D. Summers ◽  
Gregory M. Mocko
Keyword(s):  
Engineering Design ◽  
Information Content ◽  
Model Comparison ◽  
Graphical Representation ◽  
Mechanical Design ◽  
Unconditional Probability ◽  
Function Model ◽  
Topological Information ◽  
Grammar Rules ◽  
Function Models

In this paper, two approaches for computing the topological information content of function models in mechanical engineering design are developed and compared. Previously, a metric for computing information content of functions and flows within function models was proposed. Here, this metric is evolved to include the information contained in the connections between flows and functions in a function model. The first approach is based on uniform unconditional probability of a flow connecting any two functions within the model. The second approach is based on additional knowledge that the functions and flows in a model have limited compatibility, thereby, reducing the choices for origin and destination functions for each flow. This additional knowledge is represented using a new graphical representation supported by syntactic grammar rules. Both approaches are then applied to an example function model. Comparison between the approaches shows that the inclusion of this additional knowledge increases the expressiveness by reducing the uncertainty associated with function models.

IMAGE OF THE REPUBLIC OF MORDOVIA IN THE MEDIA VOLGA FEDERAL DISTRICT (BASED ON CONTENT ANALYSIS OF NEWS PUBLICATIONS)

2020 ◽  
Vol 10 (4) ◽  
pp. 44-52
Author(s):  
LARISA ZAITSEVA ◽  
Keyword(s):  
Content Analysis ◽  
Information Content ◽  
Federal District ◽  
Information Space ◽  
Political News ◽  
Social Sphere ◽  
The Media ◽  
The Republic ◽  
Number Of Publications

The territorial image is formed both purposefully by the subjects of image-making, and spontaneously-based on the influence of information content published in various media. The purpose of the research is to analyze the image of the Republic of Mordovia in the information space of the Volga Federal district. The image of the territory formed by external target audiences by means of news materials is studied using the method of case study and content analysis of publications: “Volga news”, “Federal Press” news of the PFD, “Pravda PFD”. The authors conclude that modern reality is perceived through the prism of the information field created by mass media. The media creates images filled with certain data, facts, colored by emotions, on the basis of which representations, opinions, judgments, and assessments are subsequently formed. The media play a significant role in shaping the territorial image, especially for external target audiences who are not familiar with the region and do not have their own assessment knowledge and experience. Most of the information content about the Republic in the studied media is related to the main thematic blocks: politics, economy, social sphere, culture (art, sports). Moreover, if in the publications “Volga news” and “Pravda PFD” mention of the region prevails in the economic block, then in the publications “Federal Press” and “Nezavisimaya Gazeta” - in the political one. The Volga news publication significantly dominates the rest in terms of the number of publications about Mordovia. The content of publications is mostly positive and neutral related to the issues of economic development of the territory and the preparation and holding of the world football championship. Pravda PFD mentions the Republic in the context of news from neighboring territories, most of the publications date back to 2018, but here the context is related to the Republic's positions among the regions of the PFD in various ratings. The publication “Federal-Press” forms a generally reflective image of the territory, focusing on the negative aspects of regional life. “Nezavisimaya Gazeta”, giving priority to political news, maintains a neutral and reflective context of publications, paying attention to the key problems of the territory. Thus, the desired image of the region is counter-dictated to the image broadcast by the media through various information channels, so it is necessary to constantly monitor the information space and timely correction of the broadcast materials.

The Roles of Features and Abstraction in Mechanical Design

1994 ◽  
Author(s):  
LeRoy E. Taylor ◽  
Mark R. Henderson
Keyword(s):  
Life Cycle ◽  
Engineering Design ◽  
Design Process ◽  
Design Research ◽  
Mechanical Design ◽  
Product Modeling ◽  
Product Models ◽  
Mechanical Products ◽  
Unique Framework ◽  
The Relationship

Abstract This paper describes the roles of features and abstraction mechanisms in the mechanical design process, mechanical designs, and product models of mechanical designs. It also describes the relationship between functions and features in mechanical design. It is our experience that many research efforts exist in the areas of design and product modeling and, further, that these efforts must be cataloged and compared. To this end, this paper culminates with the presentation of a multi-dimensional abstraction space which provides a unique framework for (a) comparing mechanical engineering design research efforts, (b) relating conceptual objects used in the life cycle of mechanical products, and (c) defining a product modeling space.

The Field Measure of Special Strata Freezing Temperature in West Area

2012 ◽  
Vol 170-173 ◽  
pp. 1207-1210
Author(s):  
Jun Hao Chen ◽  
Rui Zhang
Keyword(s):  
Engineering Design ◽  
Freezing Temperature ◽  
Design Requirement ◽  
Shaft Sinking ◽  
Design Requirements ◽  
Security Information ◽  
Frozen Wall ◽  
The Difference ◽  
Circle Tube ◽  
Field Measure

A new round of upsurge of mine well construction were set off in the west area, but there are many problems, this article through the field measure of special strata freezing temperature in Bo-jiang-hai-zi coal mine airshaft, use the freezing shaft sinking security information network visualization platform that developed by Anhui University of Science and Technology, analysis several different strata, obtain the overall temperatre decline rate, and compare the difference between in-site shaft well temperature and the calculation value at different position, and difference is very small, it shows that the platform can good response the actual situation. Through calculation, the frozen wall thickness, average of frozen wall temperature, shaft well temperature are meet the engineering design requirement, so propose that in west area at the freezing method mine well construction, the main purpose is waterproof, and use single circle tube freezing can satisfy engineering design requirements.

scholarly journals Performance Comparison of Recent Population-Based Metaheuristic Optimisation Algorithms in Mechanical Design Problems of Machinery Components

Machines ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 341
Author(s):  
Bugra Alkan ◽  
Malarvizhi Kaniappan Chinnathai
Keyword(s):  
Engineering Design ◽  
Mechanical Design ◽  
Search Algorithm ◽  
Computation Time ◽  
Population Based ◽  
Performance Comparison ◽  
Design Problems ◽  
Component Design ◽  
Engineering Design Problems ◽  
Optimisation Algorithms

The optimisation of complex engineering design problems is highly challenging due to the consideration of various design variables. To obtain acceptable near-optimal solutions within reasonable computation time, metaheuristics can be employed for such problems. However, a plethora of novel metaheuristic algorithms are developed and constantly improved and hence it is important to evaluate the applicability of the novel optimisation strategies and compare their performance using real-world engineering design problems. Therefore, in this paper, eight recent population-based metaheuristic optimisation algorithms—African Vultures Optimisation Algorithm (AVOA), Crystal Structure Algorithm (CryStAl), Human-Behaviour Based Optimisation (HBBO), Gradient-Based Optimiser (GBO), Gorilla Troops Optimiser (GTO), Runge–Kutta optimiser (RUN), Social Network Search (SNS) and Sparrow Search Algorithm (SSA)—are applied to five different mechanical component design problems and their performance on such problems are compared. The results show that the SNS algorithm is consistent, robust and provides better quality solutions at a relatively fast computation time for the considered design problems. GTO and GBO also show comparable performance across the considered problems and AVOA is the most efficient in terms of computation time.

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