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As a special kind of software, spreadsheets have been evolving during their life cycle. Understanding spreadsheet evolution can help facilitate spreadsheet design, maintenance and fault detection. However, understanding spreadsheet evolution is challenging in practice. There are many factors that hinder spreadsheet evolution comprehension, such as, lack of version information, complicated structure...
Version information plays an important role in spreadsheet understanding, maintaining and quality improving. However, end users rarely use version control tools to document spreadsheets' version information. Thus, the spreadsheets' version information is missing, and different versions of a spreadsheet coexist as individual and similar spreadsheets. Existing approaches try to recover spreadsheet version...
Like most conventional software, spreadsheets are subject to software evolution. However, spreadsheet evolution is rarely assisted by version management tools. As a result, the version information across evolved spreadsheets is often missing or highly fragmented. This makes it difficult for users to notice the evolution issues arising from their spreadsheets. In this paper, we propose a semi-automated...
This paper proposes new operational profiles which include users' total operate time, average operate time and frequency in addition to users' operate probability for complex combinations of functions. Also, this paper describes the method to create test suite based on operational profiles for combination test of status by using example system. The method which this paper discribes can create test...
The efficiency and accuracy of the method diffracted Gaussian beam analysis (DGBA) has been validated by the commercial software GRASP, but the deficiency that it is only capable of analyzing 2D symmetrical quasi-optical systems limits its applications. In this paper, an extension to the 2D DGBA software is made to make it capable of analyzing 3D asymmetrical quasi-optical systems. And the results...
The contact resistance is the key factor influencing the performance of slip-ring, which seriously affects the reliability of the signal transmission. This paper describes the design of a multi-channel, small-signal, high precision automatic test system (ATS) for slip-ring contact resistance measurement, and it has been used in the production of slip-ring at factory.
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