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Emergency vehicle prioritization is important to the efficiency of emergency services. To address certain challenges in emergency vehicle prioritization, we perform microscopic simulations of an intelligent transportation system, where emergency vehicles broadcast certain information about their routes to nearby vehicles and traffic lights. Our study shows that broadcasting the route information can...
In the age of big data, information sharing paradigm has been fundamentally changed: Data collection and consumption are increasingly decentralized (partly due to the advent of personal computing devices), and sharing personal data over the Internet becomes a prominent paradigm for new applications. One of these applications is Health Information Exchange (or HIE) where a patient's electronic medical...
The train operation process is highly nonlinear and has multiple constraints and objectives, which lead to higher requirements for the automatic train operation (ATO) system of high-speed train. In this paper, a hybrid Model Predictive Control (MPC) framework is proposed for the controller design of the ATO system. Firstly, a piecewise linear system with state and input constraints is constructed...
This paper presents an All-in-one simulation method for klystron. The simulation results compared with conventional simulation results are also presented. Conventional simulation method calculates the klystron in part. The electron gun, beam-wave interaction and the collector are designed respectively, and thus the simulation results are inauthentic commonly. The All-in-one simulation method uses...
The rotation of blades of a helicopter induces a Doppler modulation around the main Doppler shift, which is commonly called the micro-Doppler signature and can be used for target classification. In this paper, an automatic helicopter classification method is proposed by estimating the period of the micro-Doppler signature and identifying the number of blades via time-frequency masks. The advantages...
In the United States, the buildings sector accounted for about 41% of primary energy consumption in 2010, which was around 44% more than the transportation sector and 36% more than the industrial sector. Real time forecasts for building energy consumption using weather forecasts are crucial for effective building energy management. And the Variable Base Degree Day (VBDD) model has been proven effective...
The 2 degrees of freedom linear dynamic model of 4-axle vehicle is built. The transfer functions from steering anglesd δi to the slip angle β and yaw rate γ are derived. Based on a dual- front-axle steering vehicle, the characteristic parameters, such as undamped natural circle frequency, decay factor, damping coefficient and damped natural circle frequency are calculated. The step steering input...
Visual saliency detection has become a challenging area in computer vision. In this paper, we propose a novel region based saliency detection model which considers background priors. The proposed method consists of two successive steps — region weighting and contrast computing. In the step of region weighting, we calculate the region weight for each region by region-level image feature and a log-linear...
Software reliability growth models (SRGMs) base on NHPP are quite successful. Various NHPP-SRGMs have been built upon various different assumptions, for example, software failure rate, the total number of faults, and the fault detection rate and so on. But in fact, the fault correction rate is not a constan, but a time function. In this paper, we aim to incorporate fault detection rate, the number...
With the requirement of hign quality, precision and reliability of worm driving device, it is difficult to fulfil these demands by traditional design method based on formula derivation. Digital technology is a viable means to resolve this problem. In this paper digital expression means of helicoidal surface is presented. Based on research the method to obtain digital helicoidal surface by each kind...
Opportunistic spectrum access (OSA) is a key technique for the secondary user (SU) in a Cognitive Radio network to transmit over the "spectrum holes" unoccupied by the primary user (PU). Most existing work on the design of OSA has assumed a non-reactive (NR) PU model, i.e., the PU transmission on-off status is independent of the SU access policy, which may not be practical. In this paper,...
Software reliability growth models base on the NHPP are quite successful tools that have been proposed to assess the software reliability. Various NHPP-SRGMs have been built upon various assumptions such as the number of remaining faults, software failure rate, and software reliability. But in realistic, the number of faults and the detection rate are not constants. They are time functions. In this...
CPN as object-oriented modeling tools, it is combined with undeniable agreement and trust of the update strategy, which is given a safe and intuitive model. When the given task managers are not only based on the cost of implementing the tasks in the tender selection of contractors, but a combination of trust, the implementation of utility computing tasks, whereby the decision does the task assigned...
With the changing requirements for thermal comfort and ventilation in severe cold areas of China, the design of window ventilators becomes more important. In this paper, a series of field studies have been carried out, analysing the reason of condensation phenomenon and the characters of severe cold areas. On the basis of researches, the whole model of window ventilators has been designed. At last,...
In the reliability prediction of the product with long life and high reliability, the step stress accelerated degradation test (SSADT) is commonly applied. With the motivation of predicting the product reliability most precisely, the problem of optimizing the test plans has drawn a lot of attentions in the application of SSADT. In this paper, the drift Brownian motion is selected as the degradation...
In minimally invasive surgery, steerable needle is needed to perform medical tasks in the deep of a human body. In some cases, a one-direction bendable needle can satisfy actual needs. Therefore, a one-direction bendable articulated needle is proposed in this paper. The proposed needle consists of a beveltip head, articulations, and sections. Articulations can only be bent along the tip direction...
The Web 2.0, GRID applications and, more recently, semantic desktop applications are bringing the Web to a situation where more and more data and metadata are shared and made available to large user groups. In this context, metadata may be tags or complex graph structures such as file system or web directories, or (lightweight) ontologies. In turn, users can themselves be tagged by certain properties,...
A hybrid approach for the surface segmentation of sparse triangle meshes is presented. The algorithm realizes the segmentation of different regions of triangle meshes through twice segmentations phases: in the first phase, for sparse mesh regions, the edge-based method is used after combination of planes according to the variance of the dihedral angle of normal vector; in the second phase, for other...
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