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The optimization algorithm for redundant 7R serial robot is studied. Use Devavit-Hartenberg matrix to set up a 4 times 4 matrix form closed-form equation of the 7R robot and regard the minimum condition number of the 5 times 5 Jacobian matrix as the control indices for the given 5 constrains of the end-effector in the industry requirement. Change the two joint angles thetas0 and thetas3 and use Newton...
Ultrasound imaging is a popular imaging modality due to a number of favorable properties of this modality. However, the poor quality of ultrasound images makes them a bad choice for segmentation algorithms. In this paper, we present a semi-automatic algorithm for organ segmentation in ultrasound images, by posing it as an energy minimization problem via appropriate definition of energy terms. We use...
Wireless sensor networks have become a technology for the new millennium with the endless possibilities for applications ranging from academic to military. These tiny sensors are deployed in open environments, where security for data or hardware cannot be guaranteed. Unfortunately due to the resource constraints, traditional security schemes cannot be applied. Therefore designing protocols that can...
In this paper, a fuzzy Markov random field (FMRF) model is used to segment land-objects into tree, grass, building, and road regions by fusing remotely sensed LIDAR data and co-registered color bands, i.e. scanned aerial color (RGB) photo and near infra-red (NIR) photo. An FMRF model is defined as a Markov random field (MRF) model in a fuzzy domain. Three optimization algorithms in the FMRF model,...
Although we can get the optimal path of network by ACO, there are too many interative times and the convergence speed is too slow. This paper proposes the Q-ACO QoSR based on convergence expectation with the real-time and the high efficiency of network. The algorithm defines index expectation function of link and proposes convergence expectation and convergence grads. This method improves the ability...
It is very important to optimize pattern design of ETL scenario's to data warehouse's integration in the ETL (extract-transformation-load) tools development, a good modeling process is helpful to the accuracy of description in data source, and makes the ETL workflow's design more reasonable. To find out a methodology for facilitating the modeling and management of ETL processes, aimed at Alkis Simitsis...
In order to solve facility layout problem from quantitative and qualitative perspectives, a layout approach based on simulation optimization and virtual reality (VR) is proposed. Firstly, the layout is optimized from the quantitative perspective through the iteration of simulation model and optimization algorithm. Then the optimized results are transferred into a VR system, in which designers are...
CT and MR images have been used in the liver disease treatment. In order to merge the different information into one image, image registration and data fusion must be adopted. In this paper, image registration and data fusion for MR and CT images of liver was studied. Firstly, the maximization of mutual information method was proposed to register the images. Then, some optimization algorithms, such...
This paper presents a novel approach to watermark FPGA designs on the netlist level. We restrict the dynamically addressable part of the logic table, thus freeing space for insertion of signature bits into lookup tables (LUTs). In this way, we tightly integrate the watermark with the design so that simply removing mark carrying components would damage the intellectual property core. Converting functional...
In this study, we propose a novel optimization algorithm for minimum classification error (MCE) training of modified quadratic discriminant function (MQDF) models. An ellipsoid constrained quadratic programming (ECQP) problem is formulated with an efficient line search solution derived, and a subspace combination condition is proposed to simplify the problem in certain cases. We show that under the...
In a hybrid distributed generation system (HDGS), electric power is derived from more than one energy sources. These sources are, in general, a mix of non-conventional (e.g. wind, photovoltaic etc.) and/or conventional sources. An HDGS can either be grid connected or stand alone system. In what proportion should the energy be drawn from each source of the HDGS is a critical issue which affects the...
In this paper, we propose an unconstrained IIR digital filter design method in the weighted least-squares (WLS) sense. Unlike some other design methods which utilize approximation techniques to simplify the nonlinear approximation error functions, this method expresses the design problem strictly, and utilizes the general-purpose optimization algorithms to find the minimum point. In order to guarantee...
A new method for amplitude-only optimization of circular planar slot array antennas is presented. In order to form a given three-dimensional antenna pattern for array antennas, variable metric algorithms, Davidon-Fletcher-Powell (DFP) and Broyden-Fletcher-Goldfarb-Shanno (BFGS) were jointly used to optimize the amplitude distribution of the current excitations. Thus, the optimized main lobe of the...
This paper presents a method of vehicle license plate correction based on minimum projection distance of characters area. The method shows that the projection distance to vertical coordinate axis of character area is is minimum when the vehicle license plate is corrected. Then computing the minimum vertical projection distance can capture the tilt angle of slant image. And similarly the shear angle...
In this paper, we consider robust joint linear precoder/receive filter design for multiuser multi-input multi-output (MIMO) downlink that minimizes the sum mean square error (SMSE) in the presence of imperfect channel state information (CSI). The base station is equipped with multiple transmit antennas, and each user terminal is equipped with multiple receive antennas. The CSI is assumed to be perturbed...
Voltage balance of DC link capacitors is a problem in diode clamped multilevel inverters. In this work, a simple equivalent circuit, to predict the deviation of capacitor voltages for different operation modes, is presented. This model is used together with line voltage redundancy to develop an optimization algorithm to minimize the voltage deviation among different capacitors. This allows selecting...
Functional magnetic resonance imaging (fMRI) is one of technologies that have proved to be helpful in studying the brain functions. In this paper, we have designed a hierarchical method that applies an optimization algorithm based on modified maximum correlation model (MCM) that can detect small variations across the two study groups. Based on the proposed method, we also hypothesize that dyslexia...
This paper describes a general method for the synthesis of SAW filters based on the composition of basic structure elements and variation of electrode lengths. Optimization algorithm using the scanning window approach allows effective synthesis or improvement of responses for different types of filters. The realizability and adequacy of the synthesis results were improved because the topology constraints...
In this paper, feature point matching is formulated as an optimization problem in which the uniqueness condition is constrained. We propose a novel score function based on homography-induced pairwise constraints, and a novel optimization algorithm based on relaxation labeling. Homography-induced pairwise constraints are effective for image pairs with viewpoint or scale changes, unlike previous pairwise...
After analysis of the data from Dalian bus IC card database, the paper propose an optimization algorithm for bus scheduling. By introducing an artificial immune algorithm based on information entropy, the optimal or the quasi-optimal solution to this multi-variable and non-linear problem of bus scheduling can be found efficiently. The experiment results demonstrate that the optimal bus departure intervals...
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