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This paper proposes a new spectrum allocation scheme based on detection probability of cognitive users. This new scheme takes a look at a cognitive radio network system composed of one primary system with several cognitive users which is combined with game theory to compensate the detection cost through detection probability. Nash Equilibrium (NE) was used to determine the cost based on the detection...
This work deals with the dynamic modelling, analysis and simulation of a three degree of freedom spatial manipulator using symbolic and numerical method. A specially designed concise and novel algorithm based on Newton-Euler equation is proposed to establish the dynamic equation in form of state space automatically. Through the method not only the kinematic and dynamic parameters of the manipulator...
Shear behavior is an interesting subject of soft soil engineering, and it is important to determine shear critical state under complex stress conditions. In this paper, eight failure criteria are established according to Mohr stress cycle and Coulomb strength theory. Three criteria are based on conventional soil mechanics, and the other three criteria are based on geometry-algebra theory. Last two...
With increasing air traffic flow, the increasingly complex air traffic situation has raised possibility of conflicts, which requires higher timeliness and accuracy for conflict detection. Based on the rapidly growing air traffic control technologies, such as radars with excellent accuracy, an improved unscented particle filter (MUPF) algorithm is proposed to perform real-time aircraft status estimation...
Large-scale Internet applications can benefit from an ability to predict round-trip times to other hosts without having to contact them first. In various predictable model, network coordinates system is an efficient mechanism for internet distance prediction with limited measurements. In this paper, we identify a coordinate matrix which consists of measured value between benchmark node and other common...
The structural member quality can be effectively insured in factory, but the joints of the fabricated members are weak to actual load. A new partially prefabricated laminated wall is introduced here. To investigate the seismic performance of this kind of laminated wall, the specimens with and without opening were tested under inversed cyclic loading. Simulation program was performed by the general...
In view of the high complexity of pruning algorithm for OBS (optimal brain surgery) process and the deficiency of its match usage with training algorithm, this paper presents a penalty OBS computational model, in which the pruning condition is considered as a penalty term integrated in the objective function of NN (neural network). Based on its theoretical convergence, this model is realized by adopting...
Edge being one of the most basic features of image, the features of it have important uses in computer image processing, and are widely employed in feature extraction, image recognition and other fields. This paper first introduces several major traditional and modern feature detections of edges, analyzes their respective advantages and disadvantages; and then conducts an analysis and research of...
This paper addresses an adaptive fuzzy path following control scheme for mobile robots with model uncertainty. In this scheme, the fuzzy logic system is used to approximate the uncertainty function of the controller, the parameters in fuzzy logic system are adjusted by time-varying dead-zone which its size is adjusted adaptively. The proposed design scheme guarantees that the tracking error converges...
The state explosion is a well-known problem in the field of model checking, which confines the application of model checking to some extent. This paper proposes a partition-based model checking method, which can be employed to address the state explosion problem in some procedures of verifying complex communication protocols with SPIN. The proposed method partitions the design model of a communication...
Tackling of uncertain data is a major problem in data analysis and processing. The fuzzy theory with fuzzy numbers and fractal interpolation is employed to solve the issue of uncertainty. Sample data is used as the kernel of Gaussian fuzzy membership function and its fuzzy numbers are obtained by specifying λ-cut. These fuzzy numbers are used as uncertain data and defined as a new kind of fuzzy interpolation...
It is very important to answer queries quickly in database environment. Queries are transparently rewritten using materialized views and the time consumed by queries is reduced by avoiding accessing huge raw records and performing time-consuming operations in order to improve query speed. This paper discussed the extended query rewriting algorithm based on join relation with foreign key, studied Query...
License plate location and character segmentation are the basis for license plate recognition systems, the accuracy of license plate location and character segmentation directly affect the accuracy of character recognition rate. The article used the polar coordinates transformation method for image tilt correction, and segmented characters accurately through line-by-column searching black points....
Bioelectrical impedance measurement can be used for clinic in early detection and diagnosis of many diseases or organ functional evaluation, has the merits such as non-traumatic, low-cost, continuous monitoring, simple operating and informative etc. By the use of injected alternating current signal and measured voltage data, according to the different conductive characteristics of tissues, we can...
Testability is the ability of software to facilitate testing and expose defects. Nowadays numerous methods for software testability measurement are based on the framework. As the limitation of the framework no existed method can satisfy the measurement requirements of embedded software testability completely. To solve this problem a measurement framework for embedded software testability is proposed...
Similarity measurement plays the fundamental role in the classification of information resources and transmission of network information. According to the research of text-based similarity algorithm on three-layer structure, add the word difference factors to the measurement method of the original text similarity factor, thereby reducing the similarity measurement error resulted by semantics and words...
Let G be a simple and connected graph, and |V(G)| ≥ 2. A proper k-total-coloring of a graph G is a mapping f from V(G) ∪ E(G) into {1,2, ⋯ ,k} such that every two adjacent or incident elements of V(G) ∪ E(G) are assigned different colors. Let C(u) = f(u) ∪ {f(uv)|uv ∈ E(G)} be the neighbor color-set of u, if C(u) ≠ C(v) for any two vertices u...
In this article, based on our previous work CB-RNSA, we proposed an improved algorithm ICB-RNSA: using Principal Component Analysis (PCA) method to reduce data dimension in the data pre-treatment process; the distances between antigens are calculated by fractional norm distance to increase the detection discriminations. The experiment result shows that the efficiency and detection ability of ICB-RNSA...
Several rules are presented in the paper to evaluate quantitively the preservation performance of polarimetric information for PolSAR filters. These rules comprise the matching coefficient, the difference plot, and the mean square errors between the polarization signatures of the original PolSAR data and those of the filtered data. They are tested in terms of experimental PolSAR data to show how they...
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