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Article

F. Hongyuan, Q. Yiyu and J. Yihong

Pulse control, SEM analysis and metallographic examination have been used to record and study the process by which a ball is formed at the tip of an ultra‐fine copper…

Abstract

Pulse control, SEM analysis and metallographic examination have been used to record and study the process by which a ball is formed at the tip of an ultra‐fine copper wire. The process by which the copper ball is formed, and the laws governing this process, are presented.

Details

Soldering & Surface Mount Technology, vol. 4 no. 1
Type: Research Article
ISSN: 0954-0911

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Article

F. Hongyuan, Q. Yiyu and J. Yihong

In this paper, the process of forming copper wire balls in copper ball bonding has been studied by numerical analysis. By calculating the temperature field, speed field…

Abstract

In this paper, the process of forming copper wire balls in copper ball bonding has been studied by numerical analysis. By calculating the temperature field, speed field and displacement field for ultra‐fine copper wire under a miniarc, a regular pattern of copper wire ball formation has been observed. The calculation results for the displacement field has also been tested and verified.

Details

Soldering & Surface Mount Technology, vol. 5 no. 3
Type: Research Article
ISSN: 0954-0911

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Article

Fan Yu, Junping Qiu and Wen Lou

This paper aims to solve the disadvantages of content-based domain ontology (CBDO) and metadata-based domain ontology (MDO) and improve organization and discovery…

Abstract

Purpose

This paper aims to solve the disadvantages of content-based domain ontology (CBDO) and metadata-based domain ontology (MDO) and improve organization and discovery efficiency of library resources by resource ontology (RO).

Design/methodology/approach

The paper constructed an RO model. Methods of informetrics are utilized to reveal semantic relationships among library resources. Methods of ontology, ontology-relational database mapping (O-R mapping) and relational database modelling are utilized to construct RO. Take author co-occurrence for example, the paper demonstrated the capability of RO model.

Findings

RO not only revealed the deep-level semantic relationships of metadata of library resources but also realized totally computer-automated processing. RO improved the efficiency of knowledge organization and discovery.

Research limitations/implications

Semantic relationships revealed by RO are limited to simple metadata, which makes it difficult to reveal fine-grained semantic relationships. Ongoing research focuses on the revelation of semantic relationships based on the title and abstract.

Practical implications

The paper includes implications for utilizing methods of Informetrics to construct ontology.

Originality/value

This paper proposed a standardized process of ontology construction in library resources. It may be of potential interest for anyone who needs to effectively organize library resources.

Details

The Electronic Library, vol. 32 no. 3
Type: Research Article
ISSN: 0264-0473

Keywords

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