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Efficient data delivery in vehicular ad hoc networks (VANETs) is still a challenging research issue. Position-based routing protocols have been proven to be more suitable for dynamic VANETs than traditional ad hoc routing protocols. However, position-based routing assumes that intermediate nodes can always be found to setup an end-to-end connection between the source and the destination, otherwise,...
In this paper, we investigate the video stream distributed transmission problem for the emergency communication over heterogeneous wireless networks. The key issue of the transmission problem is how to guarantee the quality of service, when the video stream is transmitted by multiple wireless access networks. According to observed available bit rate (ABR) and round trip time (RTT) over each access...
R&D dynamic alliance is the modular organization which is highly flexible. It reduces the cost, shortens the period and improves the ability of competition through the integration of core competencies and resources. We make a modular decomposition of the cooperative enterprises in dynamic alliance according to their functions, and transform each functional module into activity so as to achieve...
Forest height is one of the important ecological elements and its estimation has been developed recent years. Forest height estimation is usually obtained through the scattering centers between canopy and ground using Pol-InSAR data. There are three classes of method for forest height estimation, phase-difference between interferograms, coherence optimization based on coherent / incoherent scattering...
The SSE (streaming (single instruction multiple data) SIMD extensions) instruction set was used to accelerate the finite difference time domain (FDTD) method for the significant improvement on the simulation performance. The numerical results of the SSE acceleration on the multi-CPU workstation have demonstrated that we can obtain around 4 times speedup ratio comparing to FDTD without SSE.
The computation of the singular value decomposition (SVD) of an m ×n matrix A is important in many fields. Many sequential and parallel algorithms such as Jacobi, QR based methods have been proposed. In this paper, we study the one-sided JRS algorithm which is based on traditional cyclic one-sided Jacobi algorithm by using the relaxation technique and give a new method in which the relaxation parameter...
It is more difficult to remove the noise and keep the edge information in the same time in the brain MR image than the ordinary image since the boundaries of encephalic tissue are highly complicated. As one kind of the multi-scale and multi-directional geometrical analysis method, the Contourlet Transform (CT) is an optimal representation of the contour and texture information in an image and overcomes...
We propose four approaches to estimating the directed information rate between a pair of jointly stationary ergodic processes with the help of universal probability assignments. The four approaches yield estimators with different merits such as nonnegativity and boundedness. We establish consistency of these estimators in various senses and derive near-optimal rates of convergence in the minimax sense...
Reducing greenhouse gases (GHG), especially carbon dioxide, has become a critical environmental issue worldwide and has attracted attentions in all economic sectors and industries. Ranking the second in cargo turnover volume in China, road cargo transportation has become a key carbon reduction field in the country. In this paper, we study the vehicle routing problem with simultaneous pickups and deliveries...
In the brain Magnetic Resonance (MR) images, the boundary of each encephalic tissue is highly irregular. It is difficult to accurately detect the encephalic tissues. Owing to its powerful capacity in solving non-linearity problems, Support Vector Machine (SVM) has been widely used in object detection. The conventional SVMs, however, assume that each feature of a sample has the same importance degree...
As a necessary way of sustainable development in the construction industry, Green construction have become consensus in academia and industry. Points out that the domestic problems in the development of green construction and analysis of its causes, and put forward some development strategy: strengthening the functions of the Government tovigorously promote green construction; Increase the intensity...
At present, autonomous motion control for high-speed mobile robot is one of bottlenecks that restrict the development of mobile robot technology. It is very dangerous when the vehicle is in a instable drift state, in which state it is difficult to model and realize effective control. Therefore, general high-grade cars take measures, such as ABS technology, to curb drift in order to make the car stable...
A 20 Watt LDMOS radio frequency integrated circuit (RFIC) targeting 2 GHz macro cell and small cell base station applications has been developed using state of the art LDMOS technology and a unique, proprietary Power Quad Flat No-Lead (PQFN) package. The broadband amplifier was designed to cover the 1.7 GHz to 2.3 GHz frequency band and performs exceptionally well under multi-mode, multi-band conditions...
The paper presents the technical design and progress on a high-power laser XG-III, which consists of three synchronized beams, i.e. the femtosecond, picosecond and nanosecond beams.
Aim at the problem that the variation of constraint leads to variation of assembly sequence, this paper presents a method based on the gray theory associated with genetic algorithm (GA). The variation of constraint on assembly site for complex products includes absence of parts, fixtures, resource and so on. Firstly, a seven-cell coding format is built based on multiple genes. The fitness function...
With the rapid progress of electronic and information technology, body area network (BAN) has been widely used for biomedical monitoring systems using the human body as a transmission medium. In this paper, the effect of the type of arm models on electric field distribution and attenuation constant of on-body transmission have been investigated. In order to assess the sensitivities of the transmission...
In this paper, predator-prey model of Holling III-function response with nonlinear density dependent was discussed by the differential equation qualitative theory, the properties of equilibrium was analysed and the sufficient condition of existence and uniqueness of the limit cycle was obtained.
Fault localization is a critical step of software debugging. We present a statistical fault localization approach via semi-dynamic slicing in this paper. In our technique, we first conduct the execution flow graph based on both the coverage information and static control-flow-graph to model the executions approximately. Second, we use the backward slicing to analyze the dependence relationships between...
In this paper, an implementation of the chroma interpolator with great hardware reuse and no multipliers for H.264 encoders is proposed. First, the characteristic of the chroma interpolation is analyzed to obtain an optimized decomposition scheme, with which the chroma interpolation can be realized with arithmetic elements which are comprised of only adders. The design was prototyped within a Xilinx...
We explore a basic noise-free signaling scenario where coordination and communication are naturally merged. A random signal X1, …, Xn is processed to produce a control signal or action sequence A1, …, An, which is observed and further processed (without access to X1, …, Xn) to produce a third sequence B1, …, Bn. The object of interest is the set of empirical joint distributions p(x, a, b) that can...
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