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Many noninvasive continuous blood pressure measurements using photoplethysmography (PPG) are still inadequate in terms of accuracy and stability, which hinders the practical application of this method. This paper proposes a model based on ensemble method for BP estimation using PPG. A number of blood pressure calculation base-models is built on the same training data. These base-models are used to...
Realistic wrinkles are important for enhancing the realism of 3D facial expression. In this paper, we proposed a combined method to simulate realistic wrinkles generated in facial expressions. By taking physiological mechanism of facial wrinkles into account, we used the muscle model for facial animation to extract the wrinkle region, and then an improved wrinkle model was applied to generate wrinkles...
The rendering of lines for 3D models is an important research topic in NPR(Non-Photorealistic Rendering). In line drawing, the use of loose style can help artists express their emotion and depict objects vividly. In this paper, we summarized the aesthetic factors of loose line style in two aspects: line thickness and line omission, and proposed a mathematical description for it. We also provided a...
Turning non-autonomic ventricular cells into pacemaking cells is believed to hold the key for making a bio-pacemaker that could potentially treat patients with cardiac conduction diseases. In this article, we analyze the effects of various membrane ion channel currents on ventricular automaticity induced by reducing the inward-rectifier K+ current (IK1). It was found that the L-type calcium current...
Reconfigurable computing provides a number of advantages such as low R&D cost and design flexibility compared with application specific logic circuits; however its low power efficiency and logic density limit greatly its wide application. One of the major reasons of this shortcoming is the SRAM based configuration memory, which occupies large die area and consumes high static power. The later...
Kinds of topics and discussions come forth in Web forums every day, we can talk about newsletters and daily trivial matters in virtual communities, communicate with each other deeply in thought essentially. Part subjects are hot topics, which attract a lot of users, are widely viewed and massively discussed. Hot topic can be classified as isolated topic and social topic. The characteristics of social...
In ubiquitous computing system, the increasing mobile and dynamic of software and hardware resources and frequentative interaction among function components make fault-tolerant design very challenging. In this paper, we propose a context and policy based self-adaptive fault-tolerant mechanism for a mobile ubiquitous computing environment such as a mobile ad hoc network. In our approach, the fault-tolerant...
In this paper, an artificial stock market based on Agent is built combined with system simulation technology. The heterogeneous investors will evolve and adapt to the environment through social learning in the artificial stock market. Public rule set is composed of the trading rule of each investor. And the public rule set evolves by genetic algorithm. This paper analyzes and researches the impact...
This paper presented a new method for scene images classification via Partially Connected Neural Network. The neural network has a mesh structure in which each neuron maintain a fixed number of connections with other neurons. In training, the evolutionary computation method was used to optimize the connection target neurons and its connection weights. The model is able to receive a large number of...
Aiming at the simulation problem of vehicle maneuvering along path accurately, simulation framework including motion control module, viewpoint control module, collision detection module, path-maneuver module and special effect module is firstly presented according its simulation functions and characteristics. Secondly, key technologies involving terrain model optimization, large area database management...
The prominent virtues of grey prediction are small information, few data and a little of computation. The conventional PID controller has strong robustness, sophisticated technology and simple structure, so it has been used widely in the process control. With the adjustable role of feedback response of biological immune systems, the capability of simulating non-linear functions with fuzzy rationalizing...
3D equipment operation simulation training system (3D-EOSTS) for solving difficult training problem is presented. System building based on 3D modeling can greatly improve the efficiency for the trooppsilas daily training. According to the equipment training requirement, the system architecture and functions are put forward. The whole system includes six simulators such as network simulator, headquarters...
Role Based Access Control (RBAC) has been shown to be a promising approach to ensure secure access in pervasive environment. In an RBAC system, users acquire permissions by activating roles authorized to them in user sessions. Hence, determining role sets that can be activated in a single user session is an important issue. In particular, systems employing an RBAC model extended with hybrid hierarchy...
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