最新刊期
卷 43 ， 期 11 ， 2015
- 摘要：One of shortcomings found in the particle swarm optimization algorithm is that it is easy to fall into local optimum,and the opposite learning strategy has a good effect on the improvement of this shortcoming.However,to improve the global search ability by using the opposite learning strategy it is necessary that in the late algorithm other strategies are combined to opposite learning strategy.To overcome this shortcoming,this paper improves the opposite process of the opposite learning strategy according to the refraction principle of light,and proposes the unified model of opposite-based learning(UOBL) and the improved particle swarm optimization algorithm based on the opposite learning model of the principle of refraction(refrPSO).Experiment results and analysis show that the model improves the global search ability of the refrPSO algorithm more effectively compared with other particle swarm algorithm based on opposite learning and the diversity of the population.Because of these improvements,the refrPSO enhances the convergence speed and the accuracy of optimization.关键词：intelligent optimization;particle swarm optimization;opposite-based learning;refraction principle2|2|15更新时间：2025-07-16
- 摘要：Aiming at the problem of selecting a better service with the same or similar functions,one method is considering the users' experiences on the service quality.Then an algorithm called A Service Selecting Algorithm Based on Quantified QoE Evaluation(ASSABQ) is proposed.The algorithm is deduced from a hierarchy rating model and the corresponding user preferences.User preferences can be acquired from analyzing the statistical data of users' satisfaction feedbacks.Each service is rated with a satisfaction score according to the algorithm.The highest scored service will be selected to the user.Experiments compare the algorithm with both different configurations and algorithms.Compared to FCE_RS algorithm,the algorithm complexity of ASSABQ is improved from O(n2) to O(n),and the user satisfaction ratio is elevated by 10% in the same simulation scenario.关键词：service selection;hierarchy model;quality of experience(QoE);user preference2|2|0更新时间：2025-07-16
- 摘要：Based on row pipelining coarse grained reconfigurable architecture(CGRA),we presented MOM(multi-objective optimization mapping) algorithm to solve the multi-constraints hardware task partitioning-mapping problem.The cumulative probability weight function was constructed by the execution delay of computing nodes and the dependence between two nodes,etc.With the constraints of reconfigurable cell area and interconnection,the proposed algorithm could adjust dynamically the scheduling order of the ready nodes by thefunction values.When a row of the RCA was mapped completely,MOM began on a new row.When the RCA was filled,MOM switched to the next one.When a DFG(data flow graph) was mapped completely,the number of modules and etc were calculated automatically in MOM.Experiment results show that the average execution total cycles of MOM decrease by 8.4%(RCA4×4) and 5.3%(RCA6×6) comparing with LBGM(level based greedy mapping) algorithm.Comparing with SPKM(split-push kernel mapping) algorithm,the average execution total cycles of MOM decrease by 20.6%(RCA4×4) and 21%(RCA6×6).Experimental evaluation confirms the efficiency of our approach.关键词：reconfigurable cell array;temporal mapping;accumulation probability weight;asynchronous computation delay;resource constraint2|2|1更新时间：2025-07-16
- 摘要：A discrete artificial bee colony algorithm based on logic operators was proposed to avoid some defects such as high redundancy,poor exploration and trapping into a local optimization etc.By introducing a series of logical operators,the problem that solutions don't update had been solved,so the solution searching efficiency was improved.Moreover,the intermediate and final solution is enclosed in the discrete closed set,avoiding the problem that mapping the real number to discrete set.The complexity of the discrete artificial bee colony algorithm based on logic operation is lower,and it is easily implemented in hardware.The proposed algorithm is validated on the spectrum allocation model based on graph coloring,obtaining a faster convergence speed and a higher optimized performance.关键词：artificial bee colony(ABC);discrete optimization;logic operation;discrete closed set;spectrum allocation2|2|6更新时间：2025-07-16
- 摘要：The convex combination algorithm(CCA) is proposed to optimize single hidden layer feedforward neural networks.This method updates the weights by iterating to massage the information in the hidden layer.And a new error function is set up to measure the performance of the neural networks.The optimized parameters can be obtained by decoupling the weights,which improves the calculating speed of the parameters.On the basis,a design method of an adaptive neural networks state observer for nonlinear systems is proposed.At last,the simulation is used and illustrates that the observer can observe the state values of the system accurately and quickly.关键词：observer;convex combination algorithm;feedforward neural networks;optimization2|2|0更新时间：2025-07-16
- 摘要：1D all-phase digital processing method has been applied in such fields as spectrum analysis,adaptive processing,template design and filter bank analysis & synthesis.However,the progress of researches on 2D all-phase is so slow that there are no implementation methods yet.Due to the above,this paper firstly analyzes the 2D all-phase signal processing mode to deduce out 2D all-phase filter with convolution windows;Secondly,the implementation structure of 2D all-phase processing is given and thealgorithm is optimized as well.Thirdly,2 important characteristics of 2D all-phase filter are discussed;finally,3D transmission curves are drawn out based on MATLAB.Summarizedly,this paper completes designing 2D all-phase digital filter theoretically,implementation method and experimental verification.关键词：all phase;base window;all-phase transformation;kernel;linear phase2|2|2更新时间：2025-07-16
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Gamut Mapping Algorithm for Color Signal Based on Spherical Coordinates and Triangular Interpolation
摘要：In order to solve the distortion problem of color signal in cross media reproduction process,a gamut mapping algorithm based on spherical coordinates and triangular interpolation was proposed.Firstly,the algorithm chooses the boundary color samples of target gamut as the triangular interpolation nodes.Secondly,three optimal interpolation nodes are selected through a pre-search process.Finally,the algorithm calculates the correspondent gamut boundary point of the mapping color by triangular interpolation.The experimental results demonstrate that the algorithm has good calculation precision and efficiency,and can be used in the color mapping process of different color devices and images.关键词：cross media;color management;gamut mapping;printer;CIELAB color space2|2|3更新时间：2025-07-16 - 摘要：In 2011,Pang et al proposed a new multi-receiver ID-based anonymous signcryption scheme by using Lagrange interpolating polynomial.They announced that their scheme makes it impossible for an attacker or any other message receivers to derive the identity of a message receiver such that the privacy of each receiver can be guaranteed.In this work,we studied the security of Pang et al's anonymous multi-receiver signcryption scheme.It is regretful that we found a receiver is not really anonymous to any other receivers in Pang et al's scheme.In order to solve this security defect,an improved scheme was proposed.Finally,the improved scheme was proved to satisfy the correctness and receiver anonymity in the random oracle model.关键词：multi-receiver signcryption;anonymity;identity-based signcryption;Lagrange interpolating2|2|5更新时间：2025-07-16
- 摘要：The linear approximation of addition modulo m is studied in this paper,where m>3.Using classification counting method,an exact probability formula of the XOR of the lowest two bits of the summation of k integers modulo m approximate to the XOR of the lowest two bits of every integer is given in this paper.Moreover,the effect of this approximation is discussed for k=2,3 or 4.关键词：cryptography;linear cryptanalysis;modular addition;linear approximation2|2|0更新时间：2025-07-16
- 摘要：A region matching variational optical flow algorithm based on image local structure according to the computing accuracy and robustness of the variational optical flow method is proposed.Firstly,the data term of the optical flow estimation energy function combines the constancy of the image structure and constancy of the grey value,which introduces a penalty function to ensure the good accuracy and robustness of the optical flow computing.Secondly,the smoothing term uses an adaptive nonlinear diffusion function which related to the image structure to preserve the boundaries of the motion.Finally,the region matching strategy and the coarse-to-fine method are used to compute the large displacement optical flow,and then the robustness and convergence are proved by mathematical method.Several experiments prove that the proposed algorithm has the better precisionand robustness even there are terrible illumination changes,complex motion of non-rigid object and large displacement of multiple objects.关键词：variational optical flow;image local structure;adaptive diffusion;region matching2|2|7更新时间：2025-07-16
- 摘要：This paper presents a new multiple-classifier approach for spectral-spatial classification of hyperspectral images(HSI).Firstly,subspace based multinomial logistic regression(MLRsub) method is used to calculate the full probability of each pixel in the feature space;Secondly,the sub-dictionary is constructed by the training samples of the most two reliable classes,which is determined by the full probability for each pixel.Then,sparse unmixing(SU) is used to calculate the sparse probability in the original HSI.Finally,the full probability and sparse probability are fused linearly and the spatial information is exploit by an edge preserving Markov random field(MRF) regularizer.Experimental results indicate that our proposed multiple-classifier leads to better classification performance than the state-of-the-art methods,even with small training samples.关键词：hyperspectral classification;subspace multinomial logistic regression;sparse unmixing;multiple classifier;MRF regularizer2|2|8更新时间：2025-07-16
- 摘要：Semi-automatic 2D-to-3D conversion is a promising solution to 3D stereoscopic content creation.Its main process is to estimate the dense depth map from user-defined strokes on the image.Existing methods preserve depth boundaries by incorporating hard segmentation.However,the inexact segmentation around object boundaries will decrease depth accuracy around these regions.To help solve this problem,an edge-aware interpolation method is developed which is constrained by depth consistency between pixels and superpixels.First,we formulate depth propagation in terms of two energy functions of pixels and superpixels,which are influenced by each other through the constraint of soft segmentation.Second,the energy functions are reformulated in matrix forms and they are solved jointly in a sparse linear equation.We recover depth boundaries with help of the superpixels constraint which prevents depth propagation across low contrast edge regions.Experimental comparisons with existing algorithms show that our method demonstrates significant advantages over object boundaries.The PSNR is improved by more than 1.5 dB compared with hybrid graph-cuts and random-walks approach.关键词：2D-to-3D conversion;graph-cuts;random-walks;soft segmentation2|2|1更新时间：2025-07-16
- 摘要：To address the problem of slow convergence rate of the distributed least mean square algorithms for highly correlated input signals and the problem of high computational complexity of the distributed affine projection algorithms,this paper proposes two distributed subband adaptive filtering algorithms,i.e.,the incremental and diffusion subband adaptive filtering algorithms.The distributed subband adaptive filtering algorithms partition the signals of nodes to reduce their correlation so that their convergence rate can be increased.The computational complexities of the distributed subband adaptive filtering algorithms are close to those of their corresponding distributed least mean square algorithms due to decimation operations included in the filter banks used for subband partition.Simulation results show that the distributed subband adaptive filtering algorithms exhibit good performance as compared to the corresponding distributed least mean square algorithms.关键词：adaptive signal processing;adaptive networks;subband adaptive filtering2|2|1更新时间：2025-07-16
- 摘要：Existing work on multibeam joint precoding technique assumes the availability of perfect channel state information(CSI) at the satellite transmitter.Unfortunately,this assumption is not applicable to mobile satellite systems due to the long propagation delays,especially for the geostationary earth orbit(GEO) satellite systems.In order to solve the problem,this paper presents a multibeam cooperative transmission method based on partial CSI.Employing the shadowed-Rice fading channel model,a closed form expression is derived for the outage capacity and the optimal joint precoding algorithms are proposed assuming the availability of only partial CSI.Simulation results have shown substantial performance gain compared with conventional single beam based processing scheme.关键词：satellite;multibeam;partial channel information;outage capacity;precoding2|2|2更新时间：2025-07-16
- 摘要：The scatterometer onboard HY-2 satellite is calibrated using Numerical Ocean Calibration and its retrieval winds after calibration are validated from 130 global buoys and winds from the European Centre for Medium-Range Weather Foresting Numerical Weather Prediction model using triple-collocation during December 2012,resulting in 3112 collocated triplets.The KNMI QC flag is used to collocate the data without rain efforts.It is found that functional relationship employing the error-in-variables method is more accuracy than that using linear regression for the validation of retrieval wind from HY-2 scatterometer.Moreover,using the wind component domain is confirmed to be favourable.It is shown that the uncertainties after ocean calibration is less than 0.15dB,resulting in 0.2m/s systematic wind effects.For both zonal and meridional winds,the similar wind fields comparing with buoys and ECMWF indicate that the effective of the calibration and high quality of the retrieval winds.关键词：HY-2 satellite;scatterometer;calibration and validation;wind field2|3|1更新时间：2025-07-16
- 摘要：A new subclass of binary Alternant codes is proposed based on the Hamming weight distribution of Maximum Distance Separable(MDS) codes.It is shown that the new codes include the whole BCH codes subclass and can asymptotically meet the Gilbert-Varshamov(GV) bound.关键词：Alternant codes;BCH codes;Gilbert-varshamov bound;Hamming weight distribution;Maximum distance separable(MDS) codes2|2|0更新时间：2025-07-16
- 摘要：Under the condition of partial channel state information that is obtained from limited feedback,a physical layer security transmission technique is investigated for amplify-and-forward untrusted relay systems,where the positive secrecy capacity is obtained through the artificial noise interference information transmitted by the destination node.Closedform expressions for security outage probability and transmission outage probability are derived,and the impacts of the number of feedback bits on security and reliability are analyzed.Furthermore,an adaptive selection scheme for the optimal number of feedback bits is proposed in order to simultaneously satisfy both required security and reliability.关键词：physical layer security;limited feedback;untrusted relay;security outage probability;transmission outage probability3|2|2更新时间：2025-07-16
- 摘要：To solve the issues of the poor performance and false lock in the blind timing synchronization for M-ary partial-response continuous phase modulation(CPM) signals,a new PAM-based timing synchronization scheme was developed from the perspective of pulse amplitude modulation(PAM) decomposition.A novel blind timing synchronization algorithm for M-ary partial-response CPM signals was proposed on the basis of the combination of this scheme and timing false lock detection based on Markov chain model.The algorithm reduced the number of matched filters and trellis states by optimizing the PAM pulse.Simultaneously,an auxiliary timing error detector and a false lock detector were used to monitor the appearance of false lock in real time.The analysis and simulation results show that the proposed algorithm provides accurate and rapid synchronization under low SNR and large initial timing error condition.关键词：continuous phase modulation;blind timing synchronization;PAM decomposition;Markov chain model;timing false lock detection2|2|1更新时间：2025-07-16
- 摘要：Most of the previous video synopsis methods compact the video under a fixed viewpoint,which limits the browsing space of the video.Recent method changes the spatiotemporal relationships between video objects with the side-effect of reducing the accuracy of synopsized video.This paper presents a novel-view synthesis based interactive video synopsis browsing method.Our method constructs wider browsing space that can inherently reduce the probability of collision and occlusion occurrences.To completely remove collision and occlusion artifacts,we propose a projective occlusion removing algorithm for a specified viewpoint,slightly changing the relationships between video objects.Finally,to facilitate user interactive browsing the video,we further propose an automatic viewpoint suggestion method,to compute and adjust to the optimal viewpoint in real-time according to current synopsized contents.The experiments and user study demonstrate the effectiveness of our method.关键词：novel-view synthesis;dynamic 3D video synopsis;single image scene reconstruction;velocity obstacles2|2|1更新时间：2025-07-16
- 摘要：For the time being,wireless nanosensor networks(WNSNs) is a research focus of nanotechnology.Because the nanosensors' energy is extremely limited,the energy efficiency is an important issue in WNSNs.By jointly taking into account the energy consumption of transmission and reception,the energy consumption model and energy minimization coding(EMC) are proposed for WNSNs.In this way,the transmission energy minimization can be achieved,the codeword length and code rate constraints can be met,and the optimum codeword length for the communication energy minimization can be determined.Through comparative analysis,the energy efficiency of EMC is better.关键词：wireless nanosensor networks;communication energy consumption;codeword length;on-off keying modulation2|2|0更新时间：2025-07-16
- 摘要：How to choose the appropriate feature to represent differences between classes and the common within class of generic objects is of great importance.So the 3D SIFT(scale invariant feature transform) descriptors of point clouds model based on the 2D SIFT is proposed.Then we propose a new algorithm based on multiple feature fusion of 2D and 3D SIFT descriptors respectively drawn from 2D images and 3D point clouds.The BoW(bag of words) model is used to calculate feature vectors and describe the objects according to the multiple feature fusion.The supervised support vector machine(SVM) classier is used to classify objects.Through several experiments,the advantage of this new algorithm is testified.关键词：generic object recognition;point cloud;2D SIFT;3D SIFT;feature fusion;BoW;SVM2|4|6更新时间：2025-07-16
- 摘要：Researching on the approximation of fuzzy system to integrable function class by means of the integral norm(a metric) is one method of common concern to the people.The Kp-integral norm induced by the K-quasi-arithmetic operations is not only a generalization for a one dimensional integral norm,but also an important tool to describe the p-integrable function classes.In this paper,the Kp-integral norm is redefined by introducing the quasi-subtraction operator.In the sense of the Kp-integral norm,the approximation of the piecewise linear functions to a kind of ûp-integrable functions is discussed.Then,we prove constructively that the generalized Mamdani fuzzy system has the approximation to a class of ûp-integrable functions.Finally,by a practical example the approximation effect of the generalized Mamdani fuzzy systems is illustrated.The results show that the generalized Mamdani fuzzy system can approximate a kind of ûp-integrable functions to arbitrary accuracy.关键词：K-quasi-arithmetic operation;ûp-integrable function;Kp-integral norm;piecewise linear function;generalized Mamdani fuzzy systems;approximation2|2|3更新时间：2025-07-16
- 摘要：Reliability estimation of logical circuit is becoming an important feature in the design process of deep submicron and nanoscale systems.In this paper,a reliability calculation method of logical circuit based on probability statistical model is proposed.Based on this model,the correctness of every logic gate is regarded as random event and obeying Bernoulli distribution.Meanwhile,simulation experimental results are given to analyze the logical masking properties of the circuit when only one gate set as faulty.To validate the proposed methodology we have studied the reliability range of ISCAS'85 and ISCAS'89 benchmark circuits.Theoretical analysis and experimental results show our method is accurate and efficient.关键词：soft error;reliability;probabilistic statistical model;logic mask;Bernoulli distribution2|2|1更新时间：2025-07-16
- 摘要：In a workflow system,a business process is decomposed into orderly steps,and then human resources are allocated to execute them.The process of resource allocation is constrained by access control and influenced by resource exceptions,so there exist the issues of satisfiability and robustness.Especially,the verification of its robustness relies on the judgment of its satisfiability,which is currently realized via finding one of the satisfiability solutions.This paper proposes another approach,in which the total number of all the solutions is counted to make a satisfiability judgment.Especially,the satisfiability counting under exclusion(≠) and binding(=) constraints is reduced to the problem of #SAT with solvers available by a polynomial-time counting reduction.Experiments show that,compared to the existing lowest-time satisfiability solving algorithm,our satisfiability counting algorithm achieves remarkable improvement in judgment efficiency and applicable scale.关键词：workflow;authorization;constraint;resource allocation;satisfiability2|2|2更新时间：2025-07-16
- 摘要：With the rapid development of wireless communication technology,spectrum efficiency and system capacity has been close to the Shannon limit.As a new technology,the orbital angular momentum(OAM) has attractive properties of high spectrum utilization and anti-interference,arousing widespread concerns of domestic and foreign academics.Firstly,this paper reviews the application of OAM and the basic principle of wireless communication system.Then,it puts emphasis on the research progress of OAM in the related fields,mainly on the in-depth analysis for key technologies of generating OAM and the summary in existing method for receiving OAM.Finally,it looks into the future and proposes some prominent issues to be solved and focused on wireless communication research and application of OAM,including generation and reception of electromagnetic vortex waves carrying OAM,the suppression of the mutual interference of the OAM electromagnetic vortex waves in different modes,coding of OAM and the separation and detection of vortex waves carrying OAM in different modes and so on.关键词：electromagnetic vortex waves;orbital angular momentum;wireless communication;spectrum efficiency;wireless data encoding;anti-interference2|2|14更新时间：2025-07-16
- 摘要：Corner detection is one of the fundamental topics in the field of image processing and pattern recognition,which have been used in object tracking,shape analysis,3D reconstruction.Intensity-based methods,model-based methods and edge contour-based methods are studied on this paper,and its development history,current and feature challenge are reviewed in details,which offer constructive reference to the research of the image corner detection.关键词：corner detection;feature extraction;algorithm research3|2|19更新时间：2025-07-16
- 摘要：This paper describes fundamentals of die-level assembly techniques for phase-only liquid crystal on silicon(LCOS) devices,which have not been in-depth discussed previously.The discussion contains the introduction to the basic assembly process,analysis to key assembly procedures,inspection to the assembled device and overall quality control including pre-assembly inspection and cleaning process for both glass and silicon backplane,alignment layer deposition with baking process,glue line processing,assembly and liquid crystal filling process.In particular,glue line writing,liquid crystal filling and overall quality assessment of assembly process have been substantially investigated.Finally,the excellent quality of assembled phase-only LCOS devices with characteristics have been defined.关键词：liquid crystal on silicon;assembly technique;optical inspection;liquid crystal filling;alignment layer deposition4|5|1更新时间：2025-07-16
- 摘要：System-level fault diagnosis is an important means to ensure the reliability of a complex multiprocessor system.The PMC model is regarded as an important system-level diagnosis model.By analyzing and demonstrating the properties of t-conditional diagnosable system under the PMC model,this paper first introduces a necessary and sufficient condition of t-conditional diagnosable system under the PMC model,constructs conditional fault model equations,and then solves the conditional fault model equations by using relational algebra such as natural join and cartesian product,so that a fast and convenient conditional fault model algorithm is proposed.Finally,according to the necessary and sufficient condition of t-conditional diagnosable system under the PMC model,this paper proposes a new t-conditional diagnosable decision algorithm which is simple and effective.关键词：conditional fault diagnosis;the preparata metze chien(PMC) model;conditional fault model;t-conditional diagnosable2|2|5更新时间：2025-07-16
- 摘要：The existing trajectory anonymity methods can not reflect the trajectory internal and external characteristics information well,and ignore personalized privacy requirements of moving objects.To solve these problems,we propose a new similarity measure model of trajectory structure,which considers the trajectory internal and external characteristics information of direction、speed、angle and location.On this basis,we propose the sparse minimum spanning tree clustering based personalized trajectory privacy protection algorithm.It reduces runtime by sparse methods,and generates an approximate optimal trajectory k-anonymity set by greedy strategy.Finally,the results showed our new similarity measure model of trajectory structure can calculate distance of trajectories more accurately,and our method offers better utility and costs less time than previous proposals in the literature.关键词：trajectory similarity;personalized trajectory k-anonymity;sparse methods;minimum spanning tree clustering;k-node partition2|3|1更新时间：2025-07-16
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