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A simulation framework is introduced that facilitates hierarchical definition and composition of discrete-event systems. This framework enables modelers to flexibly use graphical block diagrams, state charts, and MATLAB textual object-oriented programming to author custom domain-specific discrete-event systems. The framework has been realized in an implementation that spans multiple software simulation...
For the purposes of analyzing the possible impact of external factors on the performance and reliability of a left ventricular assist device (LVAD), a pulmonary simulator would be critical for in vitro use within a mock circulatory loop (MCL). To accurately reproduce the conditions within the pulmonary system, a pulmonary simulator should not only account for the capacity of the pulmonary system to...
Biological systems span several orders of magnitude in space and time from intracellular pathways to tissue-level processes. Many studies focus on molecular level events while other studies focus on cellular level and tissue level interactions. The immune system is highly complex and dynamic, encompassing hierarchical interactions with dimensions ranging from nanometers to meters and time scales from...
Cyber physical system is hard to develop because developers need to consider functional properties, nonfunctional properties, such as timeliness, energy, memory, safety and reliability, dynamic continuous properties, spatial requirements and the interaction with physical world. In this paper, we propose an integrated approach to develop cyber physical systems based on multi-dimensions, multi-views...
The railway system has developed from a purely physical system based on the laws of mechanics and chemistry, to a more sophisticated Cyber Physical System which embeds electronic components and control systems to improve performance and safety. Therefore, the system in the railway is a typical CPS, which is called the Railway Cyber-Physical System. The railway cyber physical system combines traditional...
Vehicular Cyber-Physical System (VCPS) is a complex network of embedded systems. The VCPS combines traditional state-based discrete control model and continuous models based on physical environments expressed by the classic differential equations which are the most suitable model for modeling physical system. Vehicular Cyber-Physical System is a very complex cyber-physical system (CPS) with intricate...
Aerospace cyber-physical system design focuses on the mutual impact of cyberspace and physical world. In this paper, we propose a multi-dimension, multidomain and multi-paradigm architecture approach for cyber physical systems. It integrates Modelica and AADL based on model-driven architecture to construct multidimension, multi-domain and multi-view approach for aerospace cyber physical systems. We...
Some novel results on a organizing supervisory control, employing fuzzy Petri-net reasoning, along with intelligent communication protocols tailored for flexible manufacturing systems are proposed. Stochastic Petri-net supervisor has been derived via a synergy of fuzzy set and Petri net theories while intelligent communication protocols via object oriented emulation modeling and corresponding programming...
The dynamics-based 3D cloth simulation has very broad applications. Generally, it involves mathematical modeling, collision detection between objects, self-collision detection for deformable object, and numerical solution of differential equations. As a result, the final simulation software system is usually complex. On the other hand, currently no suitable open-source software systems are publicly...
Among the four well known conceptual frameworks for simulation, the activity scanning strategy is one possible world-view. Other usual strategies (process-based, event-based or three phase approach) can be used. Depending on the problem to be modeled, one view will be more adapted and ease the implementation. In a system specification, the integration of the usual world-views should be clear. The...
Discrete EVent System Specification (DEVS) is a popular formalism which allows specifying and simulating models. Its main drawback is that its implementation is simulator-specific, i.e. models have to be programmed using an Object-Oriented Language (OOL).
Fluid and mechanical system is becoming much more integrated. It's difficult to simulate the whole system using traditional modeling method concentrates on establishment of several equations. Object-oriented simulation architecture of complex fluid and mechanical system was investigated. An example based the architecture focusing on the hydro-mechanical control system of the turbofan engine was established...
In order to realization electronic parts product appearance quality detection control, one kind of processor based on the intelligent knowledge automatic extraction and system intelligence modeling was presented. In the processor, wavelet-fuzzy technique and neural network technique are combined. Uses the fuzzy wavelet extraction image feature, and wavelet function is used as fuzzy membership function...
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