Changxin Xu

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Estimating the optimal number of alternatives to be explored in large design spaces: A step towards incorporating decision making cost in design decision models. ABSTRACT Exploration of design spaces is an important step in decision-based design. In consumer product development, precise design specifications are not known at the beginning of the design(More)
In multiple interaction-state mechatronic devices the interactions between elements of use-environment and elements of the device can have different qualitative structures depending upon the modes of the device operation and the states of the use-environment. This paper describes a modeling framework to support conceptual design of such devices using state(More)
Technological innovations provide an opportunity to improve product performance and reduce cost. Therefore, design organizations are interested in monitoring technological innovations. A large number of innovations are announced every year. Monitoring them manually is very time consuming. We are developing web-based innovation-alert services that can be(More)
Increasingly, complex mechatronic systems are being designed to have higher levels of autonomy and intelligence. This requires them to operate in multiple interaction-states. To facilitate computer-aided conceptual design of complex mechatronic systems, this paper provides a framework for modeling design concepts behind mechatronic systems with multiple(More)
In this paper, we propose an evolutionary game model to analyze the investment decision making process in the cyber offender-defender interaction and provide a quantified approach for defender to calculate the safety threshold to avoid the occurrence of offender leading game. Then we use simulation as a workbench to discuss the adjustment of each parameter(More)
In order to reduce product development time, we need software tools that can perform automated validation of the proposed design concepts. These tools will ensure that only valid design concepts are transferred to the detailed design stage for further development. This paper provides a step towards the automated validation of proposed design concepts. We(More)
Technological innovations provide an opportunity to improve product performance and reduce cost. Therefore, design organizations are interested in monitoring technological innovations. A large number of innovations are announced every year. Monitoring them manually is very time consuming. We are developing web-based innovation-alert services that can be(More)
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