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In view of the present virtual hysteroscopy laparoscopic system problems, combined with various processing algorithms, discussed deeply the key techniques about collision detection, deformation computation, and path planning of virtual hysteroscopy laparoscopy surgery simulator system. Subsequently, these three key techniques involved in the virtual hysteroscopy laparoscopy surgery simulator system...
With the increasement of the city vehicles, the problems of traffic accidents, traffic offense and congestion in city become more and more serious. However, the number of the traffic police is limited, so the former ways of working, such as traffic patrol and working at regular places, cannot effectively solve the problems above any more. Through the analysis of the large working scale and mobility...
In this paper, we study the algorithms to estimate the response times of service executions during real-time service composition. By using reservation schedules to derive server utilization, we can compute a more realistic response time for each service than its static execution time. Reservation schedules are kept in a system data structure called hierarchical TBTree (hTBTree). Using these response...
Spatial information processing is one of the important research contents in information technology. It is the major direction to combine geo-information technique and mobile communication technique in the spatial information processing. In this paper, we have thoroughly analyzed supporting techniques of mobile smart terminal spatial information processing system based on the spatial information's...
Depth generation is the key technology in the 3DTV system. Due to the demands for accuracy and real-time execution, local methods are more suitable, but the challenge is to decide an appropriate window for each pixel. We propose a novel local method, which constructs the support windows adaptively only based on the intensity, and the process has no relation with disparities. This is the main difference...
This paper proposes a reconfigurable real-time application design method with port-based Actor to make real-time software design reusable and flexible. Actor is composed by basic components in real-time system. Port-based Actor model is presented. Properties, status and work rules of four kind of ports used to build Actor are discussed as focus. A real-time data acquisition and display application...
Timed event is an essential part of concurrent actor interaction. This paper presents predictable time-centric semantic framework for designing actor-oriented embedded control software on the distributed platform, which reduces complexity by separating actor's data-centric computational parts from timed interaction among actors. Actors are concurrent components. Signal, timed metric distance and causality...
Concurrent real-time component is the basic unit of time-critical software on the distributed platform and trustworthy design is a continuing challenge to designers. This paper presents a reliable actor-oriented design for concurrent real-time component by separating data-related functionality and time-related interaction among components. Actor-oriented component is an encapsulation of parameterized...
This paper presents an extensible software framework for embedded system modeling on a distributed platform. Actors are concurrent components to specify time-triggered sensor readings, task invocations, actuator updates, and pattern switches independent of any given platform. Composite actor can be arbitrarily nested and framework consists of a formal semantics by separating platform-independent concerns...
This paper introduces an abstract high dependability framework for the implementation of embedded control software with hard real-time constraints. The framework specifies time-triggered sensor readings, atomic component invocations, actuator updates, and pattern switches independent of any implementation platform. In order to leverage model continuity, XML-based description of composite component...
Creditability modeling on real-time interaction specification for embedded systems on the distributed platform is a continuing challenge to developers. This paper presents a creditability modeling strategy that reduces complexity by separating data-related computational parts and time synchronization interaction among components. We introduce a notion of supervisor to discuss how to aggregate individual...
In this paper, a new method for real-time rendering of three-dimensional terrain is proposed. The method combines together several methods such as block data, view-dependent multi-resolution LOD, view frustum culling etc. It exploits a new method to measure the terrain curvature. The new method uses multiple-approach to simplify terrain model and reduce the cost of memory, which can improve efficient...
This paper provides a high dependability framework for developing real time embedded control software. Design pattern and behavior generator support hierarchical composition of real-time concurrent component. Hierarchy composition abstraction preserves the properties of different computation model in a real time environment. A simplified real-time embedded control software system is implemented to...
Trustworthy temporal scheduling is a central feature for real time embedded systems on the distributed platform and traditional strategies are difficult to conquer this problem. In this paper, we define the notion of component that reduces complexity by separating data-related computational parts and time synchronization interaction among components. Frameworks are composed hierarchically to manage...
The Urban Public Transportation Information Service System, for the bus arrival time showed on the intelligent electronic station board, is designed to provide accurate and timely information which can help travelers choose transit lines and the shortest paths, can improve the travel efficiency and attract more potential travelers. However, the current bus arrival time prediction model under application...
For the performance of networked control system is limited to the network resources and compute resources, the scheduling strategy is the key factor. This paper proposed two level schedule strategy: First, the controller and sensor nodes can be configured as event-time hybrid driven mode to improve the utilization rate. Then, considering the error and error difference response, a BP neural network...
The paper addresses a novel, fast and low complexity gaze tracking method, which remedies computation complexity and real-time processing problems of most existing gaze tracking methods. Face images are captured and pre-processed under infrared lamp-houses with dual thresholds. Pupil area is verified by the run-length in eight directions, and the gaze point is located by mapping the vectors of pupil...
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