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In this paper, we report a 3D-printed portable microindenter for measuring the mechanical properties of soft materials. The system is composed of three major components: (i) a Z-axis stage, (ii) a force-sensing indentation probe, and (iii) a data acquisition and control system. We construct most of the system parts (including the force sensing probe) by 3D printing, and perform mechanical design and...
This letter develops a systematic approach to quantitatively evaluate and compare LiFePO $_4$ battery cycle life improvement using ultracapacitors (UCs). The impact of UC sizing on temperature rise, capacity loss, and power fade under a real dynamic load profile is included for a comprehensive discussion and evaluation. It is found that the cycle-related battery capacity losses are reduced by 28.6%...
We propose a new automated debugging method for regression testing based on a synergistic application of both dynamic and semantic analysis. Our method takes a failure- inducing test input, a buggy program, and an earlier correct version of the same program, and computes a minimal set of code changes responsible for the failure, as well as explaining how the code changes lead to the failure. Although...
Symbolic execution is emerging as a powerful technique for generating test inputs systematically to achieve exhaustive path coverage of a bounded depth. However, its practical use is often limited by path explosion because the number of paths of a program can be exponential in the number of branch conditions encountered during the execution. To mitigate the path explosion problem, we propose a new...
Compilers play an important role in software development, and it is quite necessary to perform abundant testing to ensure the correctness of compilers. A critical task in compiler testing is to validate the semantic-soundness property which requires consistence between semantics of source programs and behavior of target executables. For validating this property, one main challenging issue is generation...
This paper presents joint research and practice on automated test program generation for an industrial compiler, UniPhier, by Matsushita Electric Industrial Co., Ltd. (MEI) and Institute of Software, Chinese Academy of Sciences (ISCAS) since Sept. 2002. To meet the test requirements of MEI's engineers, we proposed an automated approach to produce test programs for UniPhier, and as a result we developed...
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