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Intra prediction plays an important role in H.264/AVC. To reduce the complexity of the intra prediction of H.264/AVC, this paper proposes an efficient intra prediction algorithm. First, we determine if a macro block (MB) is flat or detailed rich by comparing its texture feature with dual thresholds criterion. Then, the flat MBs will be encoded in Intra 16×16 mode and those relatively rich MBs are...
Bi2Se3 is considered to be a three dimensional (3D) topological insulator (TI) with a bulk band gap of 0.35 eV and a single Dirac cone on the surface. [1, 2] TIs are an exciting new class of materials with insulating behavior in the bulk but gapless surface states topologically protected by time-reversal symmetry. [1, 3] Device applications exploiting these properties have so far been hampered by...
We show experimentally that single-crystal nanowires of the topological insulator Bi2Se3 can be used as the conduction channel in high-performance field effect transistor, a basic circuit building block. The current-voltage characteristics are superior to many of those reported for semiconductor nanowire transistors. The metallic electron transport at the surface with good mobility can be effectively...
Today's peer-to-peer (P2P) Video-on-Demand (VoD) systems are known to be highly scalable in a steady state. For the dynamic scenario, much effort has been spent on accommodating sharply increasing requests (known as flash crowd) with effective solutions being developed. The high popularity upon a flash crowd however does not necessarily last long, and indeed often drops very fast after the peak. Compared...
The deep penetration of Online Social Networks (OSNs) have made them major portals for video content sharing. It is known that a significant portion of the accesses to video sharing sites are now coming from OSN users. Yet the unique features of video sharing over OSNs and their impact remain largely unknown. In this paper, we present a measurement study towards understanding the video requests from...
The social networking services (SNS) have drastically changed the information distribution landscape and people's daily life. With the development in broadband accesses, video has become one of the most important types of objects spreading among social networking service users, yet presents more significant challenges than other types of objects, not only to the SNS management, but also to the network...
Model order reduction has been the research focus for a long time in large system modeling and simulation field and is also of great significance in distribution grid simulations. However the model formulation requirements of many typical MOR (Model Order Reduction) methods restrict their applications in distribution grids. This paper presents an automated state-space model generation method of large-scale...
This paper investigates the nonexistence and uniqueness of positive solutions to a kind of two-point boundary value problem (BVP) for nonlinear fractional differential equations with p-Laplacian operator, and presents a number of new results. First, the considered BVP is converted to an operator equation by using the property of Caputo derivative. Second, based on the operator equation and some fixed...
This paper investigates how to find Nash equilibria (NE) for static games by using the semi-tensor product method, and presents a number of new results. First, the payoff function of each player for static games is expressed into an algebraic form via the semi-tensor product. Second, based on the algebraic form of the pseudo-Boolean derivative, two necessary and sufficient conditions are obtained...
This paper investigates the controllability and stabilization of Boolean control networks (BCNs) with state and input constraints by using the semi-tensor product method, and presents a number of new results. First, a kind of constrained incidence matrix is proposed for BCNs with state and input constraints. Second, based on the constrained incidence matrix, several necessary and sufficient conditions...
In this paper, the joint bandwidth and power allocation in cognitive radio (CR) network based on full duplex is investigated. We first formulate the optimal problem model of the full duplex based CR (FD-CR) network, and then the bandwidth allocation for the problem subject to bandwidth constraint is derived by the dual decomposition algorithm. Moreover, the optimal power allocation scheme under power...
in this paper, we researched the status of the Visitor Locations Register (VLR) in the third generation communication system (3G). Basing on automata theory, we offer the statues modeling of the VLR, is called Visitor Locations Register Automata (VLRA), which formally describes the states, the behavior, and the variation of the VLR in the authentication protocol. Finally, we formally analyzed the...
Cloud storage has become a active field of research with the development of Internet services. However, the corresponding billing system always cost users more money because of that the billing system is not suitable for the users' realistic application. To solve this problem, the author studied the existing billing system, analyzed the features of users and cloud storage providers, and proposed a...
The model of same beam interferometry and the accuracy of the differential phase delay are analyzed for the requirement of the high precision ground based navigation and guidance in lunar orbit rendezvous and docking. The model of time delay closure of Very Long Baseline Interferometry is introduced, the accurate close differential time delay of Same Beam Interferometry is gained based on the definition...
Youtube-like video sharing sites (VSSes) have gained increasing popularity in recent years. Meanwhile, Facebook-like online social networks (OSNs), have seen their tremendous success in connecting people of common interests. These two new generation of networked services are now bridged in that many users of OSNs share video contents originating from VSSes with their friends, and it has been shown...
Airborne pollution and explosive gases threaten human health and occupational safety, therefore generating high demand for a wearable autonomous multi-analyte gas sensor system for real-time environmental monitoring. This paper presents a system level solution through synergistic integration of sensors, electronics, and data analysis algorithms. Electrochemical sensors featuring ionic liquids were...
To solve the problem of matching slabs and coils against orders in the process of hot rolling production in steel industry, we introduce matrices in which the element indicates difference between slab material and steel required in order, and also matrices in which the element indicates difference between coil and steel required in order. A multi-objective 0–1 programming model is established. And...
This paper investigates how to define and construct a Lyapunov function for Boolean networks, and presents a number of new results based on the semi-tensor product of matrices. A proper form of pseudo-Boolean functions is found, and the concept of (strict-)Lyapunov functions is thus given. It is shown that a pseudo-Boolean function in the proper form can play the role of Lyapunov functions for Boolean...
This paper investigates the function perturbation impact on the topological structure of Boolean networks by using the semi-tensor product method, and presents a set of new results. First, a new necessary and sufficient condition is presented to guarantee that an attractor is invariant after function perturbations. Second, a necessary and sufficient condition is established to analyze how do the attractors...
In the areas of safety risk assessment, how to consider uncertainty properly becomes a challenge. To resolve this problem, a new system state description method was presented firstly in the DET, that is system state sequence which can record the evolvement process of accident, and then the arithmetic of state sequence probability was designed. The probability of accident can be calculated easily in...
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