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Dynamic video streaming protocols allow video clients to adaptively choose video rates to improve viewer Quality-of- Experience (QoE). Existing works on rate adaptation choose the video rate according to network capacity or buffer state, however, they didn't consider the early quitting problem. Most viewers quit before the video ends, in which case optimal solutions for complete video sessions may...
In order to meet the need of continuous development of three dimensional (3D) Geographic Information System (GIS), we apply an algorithm that efficiently builds a compact sparse octree into GIS. The algorithm is based on the fast GPU hardware rasterization, which builds the octree structure from top level to bottom level at the same time. Therefore the graphics based parallel algorithm can accelerate...
Dynamic textures are important parts of natural video signals that usually generate an enormous size of high-dimensional data; therefore, effective representation methods are needed for relevant applications. This paper presents a new method for compact representation of high-dimensional data based on tensor decomposition, which can preserve the native form of the data. By treating the high-dimensional...
This paper presents a region-based video compression algorithm based on texture warping and synthesis. Instead of encoding whole images or prediction residuals after translational motion estimation, this algorithm employs a perspective motion model to warp static textures and uses a texture synthesis approach to synthesise dynamic textures. Spatial and temporal artefacts are prevented by an in-loop...
This paper presents AMREF, an Adaptive Map Reduce Framework designed for an effective use of computational resources in data center networks to deal with real time data intensive applications. AMREF entails its adaptivity from adaptive splitter, adaptive mappers and adaptive reducers in a stochastic control manner. We use three methods, feedback control, stochastic learning with smooth filter and...
A consensus-based distributed control algorithm for double-integrator multi-agent systems, motivated by a state-based weighted consensus algorithm of single-integrator dynamics, has been proposed in this paper. Its convergency has been proved by LaSalle’s Invariance principle. An interesting result has been obtained using the graph Laplacian matrix. Simulation results are provided to demonstrate the...
In the conventional security protection system, more separated data encryption from user identification authentication, and mainly focused on the former but ignore the latter. In order to address this problem, the dynamic and double encryption system based on two-dimensional image is presented, which combined the identification authentication with file encryption. Our approach is that, in the identification...
Intersection of inverted lists is a frequently used operation in search engine systems. Efficient CPU and GPU intersection algorithms for large problem size are well studied. We propose an efficient GPU algorithm for high performance intersection of inverted index lists on CUDA platform. This algorithm feeds queries to GPU in batches, thus can take full advantage of GPU processor cores even if problem...
This paper mainly uses flocking control algorithm to implement the ldquobiodsrdquo model of Reynolds among multi-robots. We present two flocking algorithms: the first algorithm is a gradient-based algorithm with a velocity consensus protocol, and the second one is the main flocking algorithm for robot formatin control in a free workspace with an additional target steering agent that takes the group...
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