A Model of the Geometric Tolerances Modeling and Representation Process

2014 ◽  
Vol 556-562 ◽  
pp. 3961-3964
Author(s):  
Yong Jun Jiang
Keyword(s):  
Data Model ◽  
Product Information ◽  
Typical Feature ◽  
Xml Schema ◽  
Geometric Tolerances ◽  
Representation Model ◽  
Exchange Product

Fundamental to the IMP, is the requirement to provide a harmonized data model and represent it appropriately, including geometric tolerances information that can be understood well by computers and users. In this paper, we propose a layered conformance level geometric tolerances representation model. This model uses the widely applied ASME Y14.5M-1994 as its foundation layer by abstracting most information from this standard. Thus, different application domains in an enterprise can use this data model to exchange product information. This model is further transformed with XML Schema that can be used to generate XML instance file to satisfy geometric tolerances representation requirements in IMP. Fig.1 A typical feature control frame and its possible symbols. Fig.2. Example part.

Study on Geometric Tolerances Information in Integrated Manufacturing Processes

2010 ◽  
Vol 37-38 ◽  
pp. 1292-1295
Author(s):  
Yan Chao ◽  
Hai Feng Zhang ◽  
Li Qun Wu
Keyword(s):  
Life Cycle ◽  
Data Model ◽  
Manufacturing Process ◽  
Product Life Cycle ◽  
Critical Role ◽  
Manufacturing Processes ◽  
Product Life ◽  
Internet Technologies ◽  
Geometric Tolerance ◽  
Geometric Tolerances

Tolerance information plays a critical role in many steps of the product life cycle. It is especially important due to the advances in Internet technologies and increasing integration requirements from industry. In this paper, geometric tolerances information in manufacturing process (IMP) is studied, and the layered conformance level of geometric tolerances is established according to ASME Y14.5-1994, STEP and DMIS. An EXPRESS-G data model of geometric tolerance information in IMP is established. The XML language is used to represent and program the geometric tolerances information in IMP.

Towards a Normal Form and a Query Language for Extended Relations Defined by Regular Expressions

2016 ◽  
Vol 27 (2) ◽  
pp. 27-48
Author(s):  
András Benczúr ◽  
Gyula I. Szabó
Keyword(s):  
Normal Form ◽  
Data Base ◽  
Data Model ◽  
Query Language ◽  
Xml Schema ◽  
Relational Model ◽  
Regular Expressions ◽  
Functional Dependencies ◽  
Decision Algorithm ◽  
Implication Problem

This paper introduces a generalized data base concept that unites relational and semi structured data models. As an important theoretical result we could find a quadratic decision algorithm for the implication problem of functional and join dependencies defined on the united data model. As practical contribution we presented a normal form for the new data model as a tool for data base design. With our novel representations of regular expressions, a more effective searching method could be developed. XML elements are described by XML schema languages such as a DTD or an XML Schema definition. The instances of these elements are semi-structured tuples. A semi-structured tuple is an ordered list of (attribute: value) pairs. We may think of a semi-structured tuple as a sentence of a formal language, where the values are the terminal symbols and the attribute names are the non-terminal symbols. In the authors' former work (Szabó and Benczúr, 2015) they introduced the notion of the extended tuple as a sentence from a regular language generated by a grammar where the non-terminal symbols of the grammar are the attribute names of the tuple. Sets of extended tuples are the extended relations. The authors then introduced the dual language, which generates the tuple types allowed to occur in extended relations. They defined functional dependencies (regular FD - RFD) over extended relations. In this paper they rephrase the RFD concept by directly using regular expressions over attribute names to define extended tuples. By the help of a special vertex labeled graph associated to regular expressions the specification of substring selection for the projection operation can be defined. The normalization for regular schemas is more complex than it is in the relational model, because the schema of an extended relation can contain an infinite number of tuple types. However, the authors can define selection, projection and join operations on extended relations too, so a lossless-join decomposition can be performed. They extended their previous model to deal with XML schema indicators too, e.g., with numerical constraints. They added line and set constructors too, in order to extend their model with more general projection and selection operators. This model establishes a query language with table join functionality for collected XML element data.

Integration of Heterogeneous Product Information for Industrial Cluster

2012 ◽  
Vol 201-202 ◽  
pp. 898-901
Author(s):  
Jun He Yu ◽  
Hong Fei Zhan
Keyword(s):  
Data Model ◽  
Product Information ◽  
Industrial Cluster ◽  
Structure And Properties ◽  
Integration Framework ◽  
Product Data ◽  
Product Data Model ◽  
Model Class ◽  
And Function ◽  
Classification Structure

This paper analyzed the heterogeneous product information for industrial cluster. It plays an important role in collaboration of enterprise and product information inquires in industrial cluster. The paper presented globe product data model based on PLIB standard. The globe classification structure and properties definition were given as the globe ontology for industrial cluster. The product class was expressed by general model class and function model class. The class is defined with the properties. The class and properties for injection machine were described as an example. According to the globe product data model, the integration framework can make the integration of heterogeneous product information and provide the unique inquire interface for the end customer. The integration framework was presented and analyzed.

Research on Data Model of Electronic Medical Record Based on XML

2010 ◽  
Vol 29-32 ◽  
pp. 1217-1222 ◽  
Author(s):  
Lina Liu ◽  
Qin Cen ◽  
Mei Ji ◽  
Li Qiong Chen
Keyword(s):  
Medical Record ◽  
Electronic Medical Record ◽  
Data Model ◽  
Xml Schema ◽  
Data Models ◽  
Advantages And Disadvantages

Comparing with the old medical record, EMR(Electronic Medical Record)has more advantages on morden society. While XML plays an important part in EMR, so people make no efforts to study the XML. There are two data models of XML, which are DTD and XML Schema .Firstly the paper introduces these two data models, then analysis advantages and disadvantages through an instance, finally draws the conclusion.

A Critical Analysis of Description Logics for Engineering Information Management

2006 ◽  
Author(s):  
Gregory Mocko ◽  
David W. Rosen
Keyword(s):  
Information Management ◽  
Data Model ◽  
Product Information ◽  
Description Logics ◽  
Information Modeling ◽  
Common Information ◽  
Semantic Data ◽  
Information Models ◽  
Engineering Design Problems ◽  
Engineering Information

Engineering information management (EIM), specifically the development of information models, is becoming increasingly important to facilitate the exchange of digital product information across the extended enterprise. A myriad of information models has been proposed for capturing a broad scope of design information. Recently, description logics (DLs) have received significant attention in current literature as an underlying representational formalism for developing engineering information models. In this paper, we address the question: “Why should description logics (DLs) be used for engineering information management (EIM)?” We identify the characteristics of engineering design problems and the requirements for EIM, review common information modeling formalisms, and critically evaluate the benefits of DLs over other representational formalisms. The use of DLs is illustrated for modeling engineering decision information. Finally, it is argued that DLs provides several advantages over other modeling formalism, including Semantic Data Model (SDM) and Object-Oriented Data Model (OODM), through a logic-based representation that enables reasoning to be performed for checking the consistency of the information model and providing a means for organizing the information into a hierarchical taxonomy.

Title redacted: the impact of negative online review censorship

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jennifer L. Stevens ◽  
Carol L. Esmark Jones ◽  
Mike Breazeale
Keyword(s):  
Product Information ◽  
Experimental Studies ◽  
Online Reviews ◽  
Online Review ◽  
Content Type ◽  
Brand Relationship ◽  
Exchange Product ◽  
Negative Impacts ◽  
The Impact ◽  
Harmful Effects

Purpose Consumers are increasingly using review sites to exchange product information, whereas companies attempt to maintain control of brand-related communications. One method marketers may take to retain control is to remove negative opinions about the brand. This paper aims to examine the impact on consumer’s brand perceptions when negative reviews are censored. Design/methodology/approach Two experimental studies were conducted to assess whether censorship of a negative online review, in the form of removal by the company, weakens brand relationship quality (BRQ) dimensions. Findings The results show that censoring negative online reviews has a damaging effect on BRQ. Additionally, the findings indicate that a brand may not be able to increase BRQ when a negative review has been posted, however strategic measures can be taken to diminish the potentially harmful impact. Originality/value As many brands still do not adequately understand how to handle negative online reviews, this research offers valuable implications in furthering the examination of negative electronic word-of-mouth and ways to diminish its harmful effects. Additionally, while substantial research focuses on the positive consequences of brand relationships, this research answers calls to examine the negative impacts to BRQ.

scholarly journals Approach to general data model of GIS symbol library and symbol library data exchange XML schema

2009 ◽  
Vol 12 (4) ◽  
pp. 235-242 ◽  
Author(s):  
Qingyuan Li ◽  
Deguo Su ◽  
Hongsheng Li ◽  
Haochen Liu ◽  
Lijian Sun
Keyword(s):  
Data Model ◽  
Data Exchange ◽  
Xml Schema ◽  
General Data ◽  
General Data Model

Multi-Dimensional Data Model and Version Control Method for Small-Batch Production

2012 ◽  
Vol 163 ◽  
pp. 180-185
Author(s):  
Jing Qian Wen ◽  
Qing Li ◽  
Yuan Wang
Keyword(s):  
Data Model ◽  
Product Information ◽  
Control Method ◽  
Collaborative Development ◽  
Engineering Change ◽  
Product Data ◽  
Aircraft Manufacturing ◽  
Phases Of Development ◽  
Product Data Model ◽  
Whole Life Cycle

Characteristics of contemporary aircraft manufacturing are small batch, line-unit production and collaborative development. The consistency of product data is emphasized in collaborative development pattern. In order to meet the demand to share product data by designers, planners and quality inspectors in engineering change process, configuration-based and consistent product data model in different phases of development was established. A method is proposed that describes the evolvement of product data model and version in whole life cycle,and it supports configuration management. Multi-view and multi-dimensional display of product information was implemented.

A Framework of STEP-NC Manufacturing System Integrating CAD, CAPP, CAM and CNC

2012 ◽  
Vol 233 ◽  
pp. 365-368 ◽  
Author(s):  
Zhen Yu Han ◽  
Po Hu ◽  
De Dong Han ◽  
Hong Ya Fu
Keyword(s):  
Conceptual Framework ◽  
Data Model ◽  
Manufacturing Process ◽  
Manufacturing System ◽  
Product Information ◽  
Complete Product ◽  
Nc Program ◽  
New Generation ◽  
New Framework ◽  
Entire Manufacturing Process

This paper outlines a conceptual framework of STEP-NC manufacturing system, which integrates the entire manufacturing process including CAD, CAPP, CAM and CNC, to make full use of the advantages of the new generation of data model. The STEP-NC manufacturing system consists of five parts and the STEP-NC standard is used to transport the complete product information. The intelligent CNC in this system can parse STEP-NC program directly so that no translation is needed and the part programs are reusable. Networked manufacturing can be realized by implementing this new framework of STEP-NC manufacturing system.

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