scholarly journals An Approach to Design Rationale Retrieval Using Ontology-Aided Indexing

2013 ◽  
Author(s):  
Luye Li ◽  
Feiwei Qin ◽  
Shuming Gao
Keyword(s):  
Experimental Results ◽  
Design Knowledge ◽  
Prototype System ◽  
Design Rationale ◽  
Indexing Method ◽  
Successful Retrieval ◽  
Flexible Querying

Design rationale is an important category of design knowledge. Effective reuse of design rationale depends on its successful retrieval. In this paper, an approach to design rationale retrieval using ontology-aided indexing is presented. First, a design rationale ontology is designed based on the extended IBIS-based design rationale representation. Then, an ontology-aided indexing method is given to build indices for design rationale records. Furthermore, three kinds of query modes are developed to support flexible querying. Finally, a prototype system is implemented. The experimental results show the effectiveness of the proposed approach.

Ontology-Based Design Rationale Retrieval Supporting Natural Language Query

2014 ◽  
Author(s):  
Luye Li ◽  
Feiwei Qin ◽  
Shuming Gao ◽  
Xiaolian Qin
Keyword(s):  
Natural Language ◽  
Template Matching ◽  
Sparql Query ◽  
Design Knowledge ◽  
Prototype System ◽  
Design Domain ◽  
Design Rationale ◽  
Generating Method ◽  
Natural Language Query ◽  
Successful Retrieval

Design rationale is an important category of design knowledge. Effective reuse of design rationale depends on its successful retrieval. In this paper, an ontology-based design rationale retrieval approach is presented, based on which, users can input natural language questions to search what they want. First, a database of ontology-based design rationale is constructed, which supports SPARQL query. Then, several SPARQL templates are defined according to different knowledge query requirements in engineering design domain. Moreover, a SPARQL query generating method is proposed to generate SPARQL query from natural language query automatically through template matching and keywords extending. Finally, a design rationale retrieval prototype system is implemented, and the experimental results show the advantages of the proposed approach.

scholarly journals Enhanced SPARQL-based design rationale retrieval

2016 ◽  
Vol 30 (4) ◽  
pp. 406-423
Author(s):  
Luye Li ◽  
Shuming Gao ◽  
Ying Liu ◽  
Xiaolian Qin
Keyword(s):  
Natural Language ◽  
Template Matching ◽  
Sparql Query ◽  
Design Knowledge ◽  
Prototype System ◽  
Semantic Model ◽  
Design Rationale ◽  
Query Generation ◽  
Successful Retrieval ◽  
Issue Based Information System

AbstractDesign rationale (DR) is an important category within design knowledge, and effective reuse of it depends on its successful retrieval. In this paper, an ontology-based DR retrieval approach is presented, which allows users to search by entering normal queries such as questions in natural language. First, an ontology-based semantic model of DR is developed based on the extended issue-based information system-based DR representation in order to effectively utilize the semantics embedded in DR, and a database of ontology-based DR is constructed, which supports SPARQL queries. Second, two SPARQL query generation methods are proposed. The first method generates initial SPARQL queries from natural language queries automatically using template matching, and the other generates initial SPARQL queries automatically from DR record-based queries. In addition, keyword extension and optimization is conducted to enhance the SPARQL-based retrieval. Third, a design rationale retrieval prototype system is implemented. The experimental results show the advantages of the proposed approach.

Personalized knowledge push system based on design intent and user interest

2015 ◽  
Vol 230 (11) ◽  
pp. 1757-1772 ◽  
Author(s):  
Zhan-Song Wang ◽  
Ling Tian ◽  
Yuan-Hao Wu ◽  
Bei-Bei Liu
Keyword(s):  
Knowledge Acquisition ◽  
Conceptual Design ◽  
Current Knowledge ◽  
Target Function ◽  
Design Knowledge ◽  
Prototype System ◽  
Sorting Algorithm ◽  
Illustrative Case ◽  
User Interest ◽  
Design Intent

Existing knowledge provides important reference for designers in mechanical design activities. However, current knowledge acquisition methods based on information retrieval have the problem of inefficiency and low precision, which mainly meet the requirement for knowledge coverage. To improve the efficiency of knowledge acquisition and ensure the availability of design knowledge, this paper proposes a knowledge push service method based on design intent and user interest. First, the design intent model, which is mainly the formal expression of the target function of conceptual design, is built. Second, the user interest model that consists of domain themes and operation logs is built, and an automatic updating method of user interest is proposed. Third, a matching method of design knowledge based on design intent, and a sorting algorithm of knowledge candidates based on user interest are proposed to realize personalized knowledge active push service. Finally, a prototype system called Personalized Knowledge Push System for Mechanical Conceptual Design (MCD-PKPS) is implemented. An illustrative case demonstrates that the proposed method can successfully improve the efficiency and availability of knowledge acquisition.

scholarly journals 4 Fluid Dispenser Prototype: A Time Based Approach

2014 ◽  
Vol 1 (1) ◽  
pp. 5
Author(s):  
S. M. Omair ◽  
Nageen Shahid ◽  
M. A. Haleem ◽  
M. Azam ◽  
M. W. Munir ◽  
...  
Keyword(s):  
Cost Effective ◽  
Experimental Results ◽  
Prototype System ◽  
Great Demand ◽  
Fluid Dispensing ◽  
Transceiver Module

In today's era when precise, accurate and timeefficient systems are in great demand, automated techniquessupersede manual practices. As a need of time, we introduce awireless, automated, cost effective, yet reliable and efficientsystem of fluid dispensing. Our prototype system can dispensevarying amounts of fluids in milliliters (maximum 1L) as perdemand of the user. It uses the principle of time based fluiddispensing achieved through the built-in timer property of theAT89C51 microcontroller. To satisfy the principle used andverify the system's accuracy, fluids of varying viscosities weredispensed and monitored. The experimental results of thewireless fluid dispensing system when tested showed linearrelationship between the dispensing time and desired volumes offluids having differing viscosities. The added feature of wirelesscontrol using HM-TRP series transceiver module along with onsitecontrol via a keypad eliminated the need of physical presenceof operator within the range of 10 meters in order to make thesystem operational. This system can be used in pharmaceuticaland beverage industries as well as in different laboratories fordispensing and filling volumes of fluids with varying viscosities.

Preliminary Experiments for Evaluating 3-D Effects on Cracks in Frozen Stress Models

2003 ◽  
Author(s):  
C. W. Smith ◽  
J. D. Hansen ◽  
C. T. Liu
Keyword(s):  
Experimental Results ◽  
Design Rationale ◽  
Initial Part ◽  
Photoelastic Method ◽  
Solid Rocket Motors ◽  
Rocket Motors ◽  
Background Data ◽  
Solid Rocket ◽  
Stress Models ◽  
Critical Locations

Information gleaned from applying the frozen stress photoelastic method to cracks emanating from critical locations around the fin tips in models of solid rocket motors is reviewed and assessed together with new experimental results. The studies are the initial part of a program developed to contribute background data for consideration in modifying current motor grain design rationale.

scholarly journals Validation of a SPICE Model for High Frequency Electroporation Systems

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 710
Author(s):  
Paulius Butkus ◽  
Sonata Tolvaišienė ◽  
Sebastjanas Kurčevskis
Keyword(s):  
Integrated Circuit ◽  
High Frequency ◽  
Electric Pulse ◽  
Pulsed Power ◽  
Experimental Results ◽  
Transient Processes ◽  
Model Complexity ◽  
Prototype System ◽  
Spice Model ◽  
Good Agreement

In this paper, we present an analysis and a validation of a simulation program with integrated circuit emphasis (SPICE) model for a pulse forming circuit of a high frequency electroporation system, which can deliver square-wave sub-microsecond (100–900 ns) electric field pulses. The developed SPICE model is suggested for use in evaluation of transient processes that occur due to high frequency operations in prototype systems. A controlled crowbar circuit was implemented to support a variety of biological loads and to ensure a constant electric pulse rise and fall time during electroporation to be independent of the applied buffer bioimpedance. The SPICE model was validated via a comparison of the simulation and experimental results obtained from the already existing prototype system. The SPICE model results were in good agreement with the experimental results, and the model complexity was found to be sufficient for analysis of transient processes. As result, the proposed SPICE model can be useful for evaluation and compensation of transient processes in sub-microsecond pulsed power set-ups during the development of new prototypes.

Constructing a Design Knowledge Base Using Natural Language Processing

2006 ◽  
Author(s):  
V. Sundararajan
Keyword(s):  
Research And Development ◽  
Knowledge Base ◽  
Language Processing ◽  
Mechanical Engineering ◽  
Discourse Structure ◽  
Design Knowledge ◽  
Prototype System ◽  
Figures Of Speech ◽  
Part Of Speech ◽  
Engineering Designs

Mechanical engineering, like other engineering disciplines, has witnessed maturation of various aspects of its domain, obsolescence of some areas and a resurgence of others. With a history of over 200 years of continuous research and development, both in academia and industry, the community has generated enormous amounts of design knowledge in the form of texts, articles and design drawings. With the advent of electronics and computer science, several of the classical mechanisms faced obsolescence, but with the emergence of MEMS and nanotechnology, the same designs are facing a resurrection. Research and development in mechanical engineering would derive enormous benefit from a structured knowledge-base of designs and mechanisms. This paper describes a prototype system that synthesizes a knowledge-base of mechanical designs by the processing of the text in engineering descriptions. The goal is to construct a system that stores and catalogs engineering designs, their sub-assemblies and their super-assemblies for the purposes of archiving, retrieval for launching new designs and for education of engineering design. Engineering texts have a relatively clear discourse structure with fewer ambiguities, less stylistic variations and less use of complex figures of speech. The text is first passed through a part-of-speech tagger. The concept of thematic roles is used to link different parts of the sentence. The discourse structure is then taken into account by anaphora resolution. The knowledge is gradually built up through progressive scanning and analysis of text. References, interconnections and attributes are added or deleted based upon the nature, reliability and strength of the new information. Examples of analysis and resulting knowledge structures are presented.

Automatic Conformance Test Generation for Protocols Specified in EFSM

2012 ◽  
Vol 468-471 ◽  
pp. 519-522
Author(s):  
Jun Xu ◽  
Ting Shu ◽  
Si En Lai ◽  
Yu Bo Jia
Keyword(s):  
Test Generation ◽  
System Architecture ◽  
Automatic Generation ◽  
Experimental Results ◽  
Prototype System ◽  
Automatic Test ◽  
Conformance Test ◽  
Technical Problems ◽  
Test Efficiency ◽  
Tier System

Automatic test sequences generation can improve the test efficiency. This paper focuses on how to design and implement a conformance test sequences automatic generation tool for EFSM-based protocols. Specifically, two key technical problems are discussed in detail, which are the EFSM model construction and behaviors dynamic interpretation. For the former, the three-tier system architecture is introduced to develop a graphical EFSM editor. For the latter, a dynamic script method to efficiently interpret the dynamic behaviors of the EFSM model is presented. Based on the proposed methods, a simple prototype system for conformance test generation is developed. Experimental results show that the proposed approach is feasible.

scholarly journals A Wi-Fi-Based Wireless Indoor Position Sensing System with Multipath Interference Mitigation

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3983 ◽  
Author(s):  
Tuo Xie ◽  
Hanjun Jiang ◽  
Xijin Zhao ◽  
Chun Zhang
Keyword(s):  
Interference Mitigation ◽  
Low Cost ◽  
Propagation Delay ◽  
Experimental Results ◽  
Prototype System ◽  
Indoor Environments ◽  
Multipath Interference ◽  
Position Sensing ◽  
Sensing System ◽  
Depth Analysis

Wi-Fi-based indoor position sensing solutions have the advantages of easy integration in mobile phones and low cost by using existing Wi-Fi access points. The mainstream methods are commonly based on the received signal strength indicator (RSSI), which suffers from multipath interference in complicated indoor environments. Through the in-depth analysis of the multipath interference, an RSSI-assisted time difference of arrival (TDoA) method is proposed for Wi-Fi-based indoor position sensing in this work. The key idea is to compensate for the multipath interference in the received signals based on the coarse estimation using RSSI and TDoA calculation. A prototype system has been implemented to validate the proposed method. Experimental results have demonstrated the effectiveness of the proposed method, especially for handling the multipath interference with small propagation delay difference. Experimental results show that the indoor position sensing system can achieve a 90th percentile error of 0.3 m. The proposed method can also achieve moderate computational complexity and moderate real-time performance compared to other methods.

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