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With the rapid development of Internet information technologies, a variety of programming language, technology platform emerge in endlessly. Companies are now in urgent need is to developed a distributed middleware platform with standard interface protocol, shielding the details to achieve a rapid development of information technology. This paper introduces a new way to deal with the problem. Paper...
By combining adaptive modulation (AM) and automatic repeat request (ARQ), a cross-layer design (CLD) scheme for MIMO system with space-time block coding (STBC) and imperfect channel state information (CSI) is presented in this paper, and the effect of the imperfect CSI on the system performance is investigated. Based on the imperfect CSI, the probability density function of the effective signal to...
Cognitive radio (CR) is a concept which can be used to improve the utilization of scarce radio spectrum resources. A reliable strategy for the detection of unused spectrum bands is essential in a practical implementation of CR systems. It is widely accepted that in a real-world environment, cooperative spectrum sensing involving many secondary users (SUs) scattered over a wide geographical area can...
3d-geological modeling is a means of improving data interpretation through visualization, as well as a way to generate support for numerical simulations of complex phenomena. Reconstructing horizons from scattered point clouds is an omnipresent task in 3d-geological modeling. As the geometrical representation of faults network is not watertight in the process of modeling for the reason of efficiency,...
The design of a series of microwave dielectric resonator with different ratio of diameter to length is proposed in this paper. Based on the principle of short-parallel plates method, an automatic test system with the vector network analyzer and short-parallel plate test fixture for dielectric ceramics resonator is developed. The relationship between the single or multiple work mode of ceramics resonator...
Grain size effect of nano-BaTiO3 ceramics has been studied on the basis of Ginsburg-Landau-Devonshire thermodynamic theory. In this study, ferroelectric domain of nano BaTiO3 ceramic has been researched by a second-order transition model, size effects of the polarization and ferroelectric-paraelectric transition temperature have been analyzed. The results pointed out that with decreasing grain size,...
In this paper, we evaluate thresholding algorithms applied in wavelet filter bank (FB) based passive detection in radar and sonar systems. Addressing a random emission with unknown parameters, the emission and the received signal are modelled by a Gaussian process with unknown mean and variance. The wavelet FB decomposes the received signal into subchannels. A decision on the absence and presence...
Segmentation of 3D object from complex point cloud is usually performed in 2D space by using 2D algorithms. This paper presents a novel 3D algorithm for segmentation of complex point cloud. A closed B-spline surface is selected as 3D elastic model. After initialization, control points of B-spline surface are attracted by a 3D force field and move to the surfaces of target object. 3D GVF derived from...
The wire drawing process of Polycrystalline diamond (PCD) wire drawing die is simulated by ABAQUS FEA software, which is used in drawing solar wafer cutting wire. According to the requirements of structure and sizes of shaper hole in the actual production, the wire drawing die whose reduction angle is 8 degrees is used in this simulation firstly. And the axial stress distribution and maximum axial...
Localization is one of the most important issues in Wireless Sensor Networks (WSNs), especially for the applications requiring the accurate position of the sensed information. The traditional DV-Hop method can be simply implemented in real wireless sensor networks without any range measurement tools, but it has bad localization accuracy. To overcome the shortcoming of the traditional DV-Hop method...
Combined the roughcast expansion technology for double curvature high rib integral panel part from a certain type of aircraft, a rapid and precise expansion method for the part is realized. The part base expansion method uses geometric simulation modeling method based on the hypothesis of the siding material deformation in thickness direction is negligible and the siding neutral layer surface area...
The Chan-Vese level-set model reported by Chan-Vese for image segmentation has extensive applications in many fields, but also has some disadvantages such as the weak anti-noise. In this paper, a novel level-set model based on the parzen-window is presented. The evolution of the active contour in our level-set model neither depends on the gradient of the image nor the averages inside and outside the...
The principle aim of this paper is to explore the existence of periodic solution of a three-species periodic Lotka-Volterra predator-prey system with impulsive perturbations. Sufficient and realistic conditions are obtained by using Mawhin's continuation theorem of the coincidence degree. Further, some numerical simulations show that our model can occur in many forms of complexities including periodic...
This paper studied the Vehicle Scheduling Problem under the managerial thinking of Vendor Managed Inventory (abbreviated as VMI). It particularly established the mathematical model and the iterative optimization algorithm to deal with the issues of integration of inventory management and distribution transport under VMI mode, and proved that these approaches can play roles in optimization of reducing...
Multilayer diaphragm has been designed and modeled. Commercial Finite element software, ANSYS was implemented to model the diaphragm. This multi-layer diaphragm can be used as both optical sensor and common sensor. A simplified model is introduced to reduce the CPU time. Characteristics of the multilayer diaphragm have been investigated. The important parameters of the multilayer diaphragm have been...
A vision based automatic pharmacy inventory is an unstructured environment in the sense that a random face of medicine box confronts the camera according to how it is put on shelf. This poses a challenge to traditional image content based object detection algorithms. In this paper we propose a shape-based medicine box localization framework. Instead of using feature point or texture based method which...
Avian influenza A virus (AIV) can cross the host barrier to infect human directly and has continuously been reported to cause human death worldwide. Predicting which AIVs can directly transmit from avian to human will provide early warning of AIVs with human pandemic potential, which is beneficial to public health. Although it is easy to decide a dataset of AIVs having the capability of avian-to-human...
A considerable amount of research work has been done for texture classification using local or global feature extraction methods. Inspired by Weber's Law, a simple and robust Weber Local Descriptor (WLD) is a recently developed for local feature extraction. This WLD method did not consider the contrast information. In order to improve texture classification accuracy, we propose a hybrid approach that...
A wireless remote control system based on Brain-computer interface technology is described. The command produced by PC can be sent to the controller bounded on the back of roborat. Then the controller sends biphasic stimulating pulses to brain to deliver microstimulation. This system is multi-channels, so that it can be applied in different brain control experiments as well as other electrophysiological...
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