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This paper discusses the use of Species per Path approach [1] and gene expression messy genetic algorithm (GEMGA) for automatic software test data generation. This research finds another path problem and extends Species per Path approach on dynamic test data generation. In increasing the search space by program transformation for the path potentially suffering from the path problem, this research...
Sc2O3-doped W powder for use in high current density thermionic cathodes has been made by the sol-gel method with different particle sizes. Sc2O3-W matrix cathodes have been prepared from these powders, and have shown excellent emission properties. A space charge limited current density of 40 A/cm2 at 850°C, and 170 A/cm2 at 1050°C have been obtained by using 300-500 nm Sc2O3-doped (5.0 wt.%) W powders...
A Self-made micro-mixing device was employed to produce watered fuel oil. Fuel oil and water in a certain ratio entered into the mixer through each channel respectively. Mixed with water fuel was formed under the action of shear force, convective impact and friction. The watered fuel oil was online applied to a steam boiler in an oilfield. The results of the industrial test show as follows: the thermal...
The adequate testing of black-box components is an important basis before they will be reused in the approach of Component Based Software Development. The test-data generation and test adequacy ensuring are difficult issues for the unavailability of the source code of black-box components. In this paper, an extended component interface specification model is proposed to support the component understanding,...
Sc2O3-doped W powder for use in high current density thermionic cathodes has been made by the sol-gel method with different particle sizes. Sc2O3-W matrix cathodes have been prepared from these powders, and have shown excellent emission properties. A space charge limited current density of 80 A/cm2 at 1150°C, 50 A/cm2 at 1050°C have been obtained by using 500 nm Sc2O3-doped W powders. Life testing...
With the guidance of digital image technology, this paper has studied the edge testing algorithms of vehicle logo, discussed the treatment effect of Sobel operator and Laplacian-Gaussian operator. A serious comparison between the two operators has been made, and an improved Sobel operator has been proposed.
Component Based Software Development is gaining popularity in recent years. In this way of software development, software components, which are typically black-box components, are intensively reused to construct new systems. The existed component models describe the characteristics of component from different aspects. However, there is not certain information about component testing. In this paper,...
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