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Complex Cyber-Physical System (CPS) integrating computation, software, network and physic process is suited to be designed by multi-view models to describe different aspect respectively. Ensuring consistency relationships between multi-view models and system-level properties remains to be a main challenge to such methodology. This paper proposes a comprehensive and formal description and verification...
The Cyber-Physical System has been characterized by deep integration of computing process and physical process, heterogeneous composition, etc. So it is difficult to model Cyber-Physical System and to analyze its properties. An approach to model Cyber-Physical System and to analyze its safety based on multiple modeling languages transformation is put forward. We model the Cyber-Physical System by...
How to combine the human-and-computer interaction and painting art is a hot topic in the fields of computer graphics, virtual reality, film-television advertisements and games. This paper presents an algorithm for interactive simulation of realistic sand painting based on Kinect in real-time, which consists of three sub-systems: the preprocessing system, the user interaction information capture system,...
This paper presents an approach to simulate dynamic phenomena of a flower including blooming and fading. Firstly, we constructed flower models according to the flower's primary morphology data, especially taking five species throughout the year for example, such as a tulip, a lily and other kinds of flowers. Secondly, algorithms of flower dynamic simulations includes two phases: blooming algorithm...
In this paper, we present an approach of a new surface tension formulation for Smoothed particle hydrodynamics (SPH). Our method of the surface tension formulation is decomposed into three main processes: (1) mesh smoothing, (2) surface tension computation and (3) surface tension transfer. Firstly, we exploit a Lagrangian operator to smooth an initial three-dimensional discrete interfacial surface...
Bonsai has strong ornamental characteristics, and interactive simulation of bonsai is becoming a hot topic in computer graphics modeling of plants. This paper proposes an interactive simulation method which is based on Kinect Fusion point cloud information. We get point cloud information by the Kinect, and through Laplace method to extract the skeleton of bonsai and interoperate with skeleton. Then...
Cyber-Physical Systems (CPSs), characterized by deeply integrating computing, communication and control, are large-sale, complex, embedded systems with hybrid characteristic. The uncertainty of discrete states and concurrency of continuous process, caused by hybrid interaction between computing and physical process, make it difficult to be fully described by the traditional hybrid model. In view of...
The timing of communication (e.g. deadline, response time) is an important issue in cyber-physical systems (CPS). Control Area Network (CAN) is characterized by low-cost, real-time and high reliability; and it is widely used in a kind of typical applications in CPS (e.g. lunar probe, unmanned aerial vehicle). In this paper, we characterize the mutual-effects of physical dynamics and computing process...
Recently, social tagging systems become more and more popular in many Web 2.0 applications. In such systems, Users are allowed to annotate a particular resource with a freely chosen a set of tags. These user-generated tags can represent users' interests more concise and closer to human understanding. Interests will change over time. Thus, how to describe users' interests and interests transfer path...
Dynamic water surface simulation is one of the most challenging issues in computer graphics. This paper implement an effective method for simulating dynamic water ripple effect in real-time. In the method, the water surface is constructed as a mass-spring grid, and the motion status of each mass point can be computed with Hooke's law. Instead of computing the mass points' motion in three dimensional...
Poplar is one of the best fast-growing trees in the world, widely used for windbreak and wood product. Although architecture of poplar has direct impact on its applications, it has not been descried in previous poplar models, probably because of the difficulties raised by measurement, data processing and parameterization. In this paper, the functional-structural model GreenLab is calibrated by using...
In order to describe the tree topology more efficiently for modeling and biological calculation, a ternary tree data structure is introduced in this paper. The data structure of a ternary tree and the topological structure of a real tree constitute a mapping, which presents the biological properties of plant axes and the relationships among plant axes of different tiers. The simplification of tree...
This system represents furry surfaces as nonuniform layers of texture slices, automatically adjusting the layers to achieve efficient, high-quality rendering. It employs layered shadow maps to simulate self-shadowing. Interactive tools let users intuitively create and edit furry objects and instantly view the rendered objects.
Geospatial computing today is highly manual requiring large amounts of human capital. The systems used for processing were designed for stand-alone environments, are inappropriate for modern distributed, heterogeneous network environments as Internet due to their closed architecture, and their lack of interoperability, reusability, and flexibility. The need of an intelligent architecture that can...
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