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Nowadays, the GPGPU technology has accelerated many physics-based simulations. SPH (Smoothed Particle Hydrodynamics) is widely used to simulate complex physical phenomena, which using neighbor search as its key procedure. Sorting and grid based method is one of the widely used neighbor search methods on the GPU. This paper presents a new special sorting method to accelerate the neighbor search procedure...
This paper proposes a design and implementation of the On-Board Unit (OBU) in the Vehicular Ad Hoc Network (VANET) for highways, and realizes vehicle-to-vehicle (V2V) communication. The system is divided into four parts including central control module, wireless communication module, GPS module, and human-machine interface module. The hardware platform is consisting of an ARM11-based embedded development...
Target tracking has been widely applied in the field of computer vision and extremely promising. It is also one of research hot difficulties. To its difficulties derived from information loss of three-dimensional world projecting on two-dimensional images, target appearance texture and the change of the geometry, the light changes, local or global screening etc. Incremental subspaces through online...
Analyze the time synchronization problem of the GPS/INS Integrated Navigation System. The relationship between time delay and data fusion filter performance is analyzed in the GPS/INS Integrated Navigation System on the basis of Kalman Filter algorithm. Design the time synchronization system on the basis of the 100Hz data collection signal to generate the pseudorange collection signal. The system...
In some real-time networked control applications, information between sensors and controllers is exchanged over a shared wireless channel. One key issue is to manage multiple access to the shared medium to accomplish different control tasks. In the paper, a protocol sequence based media access control (MAC) design is presented for networked control systems (NCSs). It is challenging to design an optimal...
This paper proposes an information description architecture named multi-dimensional and multi-layer, in which equipments in each vehicle that are possible to access to the network are considered as “elements” in n×m order matrix. Then a positioning algorithm, UKF, using multi-dimensional and multi-layer information is proposed, which increases the positioning accuracy greatly. Furthermore, in order...
Based on the sensitive character of light sensor, the paper applied the median filtering algorithm which was used for two-dimensional image process on the filtering of one-dimensional sensor signal and improved the algorithm with adding a determine step about heavy interference signal. The research showed that the miss-rate and the false-rate of improved median filtering algorithm are 0 and the deviate-rate...
Using FSM (Finite State Machine) theory as the foundation, based on the MATLAB / Stateflow graphical behavior description method, realizes the wheeled robot dance behavior modeling, design of the wheeled mobile robot behavior control logic. The simulation results show that the simulation model can be constructed, simulated robot dance behavior of the actual process; the logic control method can realize...
This paper proposes a Markov model for analyzing the performance of periodic broadcast in vehicular ad hoc networks (VANETs). Since there is no packet retransmission in broadcast, we only consider a one-dimensional Markov model. In the proposed model, we assume that the traffic condition is unsaturated and introduce a state to represent the situation when there is no packet waiting for transmission...
Calculating the minimum (or maximum) value of functions is an important problem in optimization field. Applying the method of ant colony optimization (ACO) to solve the problem is an interesting research topic currently, and the main disadvantage is that solution is local optimal. To evade this disadvantage in some degree, in this paper, the ant feature of sensation is used. Experiment shows that...
In this paper, a multi-hop broadcast scheme called LDMB (Link-based Distributed Multi-hop Broadcast) is proposed to broadcast emergency messages efficiently in VANET (Vehicular Ad Hoc Network). The forwarding scheme in LDMB is completely distributed, where each vehicle who receives the emergency message estimates its link status firstly and then computes the waiting time before forwarding this message...
In this paper, we propose a real-time video processing implementation of a Robust Low Complexity Feature Tracking (RLCT) algorithm on GPU (Graphics Processing Unit) using the CUDA (Compute Unified Device Architecture) paradigm. The RLCT outperforms state-of-the-art implementations of pyramidal KLT (Kanade-Lucas-Tomasi) on GPU by removing the overhead of the image pyramid construction, by predicting...
In this paper, we present the Kanade-Lucas-Tomasi (KLT) tracking algorithm coupled with a varying integration window, which tracks a small subset of feature points to initialize the approximate motion model between images. For the remaining larger subset of the feature points initial tracking location is predicted by using this motion model, thus improving the tracking result. For an image of size...
This paper carried on an analysis to the knowledge management requirements of learning organizations. Based on the requirements and the knowledge management methods, a new knowledge management solution on the learning organizations has been proposed, and the functions of the new solution have been pointed out concretely.
The high-speed feature detection is still very demanding for many computer vision applications. In this paper, the Harris and KLT corner detectors are redesigned to reduce the complexity of the algorithm. The complexity of Harris and KLT corner detectors are reduced by using the box kernel, the integral image and efficient non-maximum suppression, achieving complexity reduction by a factor of 8. For...
Wireless sensor networks (WSNs) often have many-to-one patterns and dynamic monitoring requirements, leading to energy imbalance. In this paper, we investigate the density in monitored area to determine the optimal deployment of nodes by taking into consideration of different requirements. By using our dynamic deployment scheme, energy balance can be achieved. Simulation results show that the dynamic...
In this paper, an algorithm called DPB (distributed probabilistic broadcasting) is proposed to increase the reliability of the emergent message transmission for safety applications in VANETs (vehicular ad hoc networks). In DPB which is based on probabilistic broadcasting, vehicles compute their own relay probability according to their own states at first, and then retransmit the message on basis of...
To properly benchmark and stimulate current stereo algorithms specifically in the application context of view interpolation, a robust quantitative evaluation approach is important. As a prevailing quality assessment method, interpolation error has been widely used. It measures the distortions between an interpolated image and a real camera image for a desired virtual viewpoint. However, is it a robust...
In this paper, we propose sparse non-negative pattern learning (SNPL) based on self-taught learning framework. In the algorithm, visual patterns are first learned from unlabeled data by non-negative matrix approximation with sparseness constraints, and then features are extracted by the second part of the algorithm, a conjugate family based non-negative sparse feature extraction method. By combining...
In this paper, we address the issue of transducing the object cutout model from an example image to novel image instances. We observe that although object and background are very likely to contain similar colors in natural images, it is much less probable that they share similar color configurations. Motivated by this observation, we propose a local color pattern model to characterize the color configuration...
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