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11481
An Empirical Configuration Study of a Common Document Clustering Pipeline
Published 2023-09-01“…The results suggest that BERT embeddings combined with UMAP dimension reduction to no less than 15 dimensions provides a good basis for clustering, regardless of the specific clustering algorithm used. Moreover, while UMAP performed better than PCA in our experiments, tuning the UMAP settings showed little impact on the overall performance. …”
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11482
Research of the Shift Schedule and Ratio Optimization for the Transmission System of a Two-speed Electric Vehicle
Published 2015-01-01“…Taking the coupling effect of the shift schedule in optimization process into account,the rule of developing a comprehensive shift strategy,which associates with ratios and considers the dynamic and economic performances is determined. An enumeration algorithm,which has the function of non- dominated comparing and filtering,is designed to obtain the Pareto- optimal solution set for the dual objective function. …”
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11483
Energy-efficient and fast method on storage and querying in wireless sensor networks
Published 2008-01-01“…In order to make more practical, a localized data dissemination algorithm, called BubbleGeocast, is designed. It is made up of two components: adaptive accurate data diffusion in real-time and rejection-based uniform data diffusion. …”
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11484
Single-Object-Based Region Growth: Key Area Localization Model for Remote Sensing Image Scene Classification
Published 2022-01-01“…To tackle this problem, this paper proposes a single-object-based region growth algorithm to effectively localize the most key area in the whole image, so as to generate more discriminative local fine-grained features for the image scene. …”
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11485
Deep reinforcement learning-based resource joint optimization for millimeter-wave massive MIMO systems
Published 2024-10-01“…Experimental results show that the proposed joint optimization method significantly improves the throughput and energy efficiency of the system compared with the single-stage all-digital precoding and hybrid precoding equal resource allocation methods and the particle swarm optimization-based resource allocation algorithm.…”
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11486
Active Contour Model Coupling with Higher Order Diffusion for Medical Image Segmentation
Published 2014-01-01“…To enhance the efficiency of the segmentation, the fast Split Bregman algorithm is designed for the segmentation implementation. …”
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11487
A New Synergistic Forecasting Method for Short-Term Traffic Flow with Event-Triggered Strong Fluctuation
Published 2018-01-01“…Directing against the shortcoming of low accuracy in short-term traffic flow prediction caused by strong traffic flow fluctuation, a novel method for short-term traffic forecasting based on the combination of improved grey Verhulst prediction algorithm and first-order difference exponential smoothing is proposed. …”
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11488
Region-based lossless data hiding with high capacity for medical images
Published 2015-01-01“…In view of the significant regional features of medical images,a new high capacity lossless data hiding method based on region and histogram shifting was presented.Firstly,the presented method utilized segmentation method of the maximum class separation distance to get the foreground region of medical images,and then used the polymeric polygonal approximation and image fitting algorithm to get the embedding region of region foreground.In the embedding procedure,the difference histogram circular shifting method and the code-based histogram shifting method were presented to embed hidden data in foreground and background region respectively,which improved the limit embedding capacity and resolved the overflow and underflow in traditional histogram shifting method.Experimental results show that the proposed method achieves high embedding capacity with 1 bit/pixel and stego-image quality about 40 dB.The presented method can be applied to the quality of sensitive image's large capacity information hiding with regional feature.…”
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11489
Information Retrieval and Graph Analysis Approaches for Book Recommendation
Published 2015-01-01“…These results extend the applicability of link analysis algorithms to different environments.…”
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11490
Research Progress of Synthesis and Modification Methods Based on Dynamic Substructures
Published 2020-01-01“…Finally, the development trend of dynamic substructure synthesis and modification algorithm is proposed.…”
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11491
Adaptive guaranteed time slots allocation policy in wireless sensor networks with mobility awareness
Published 2010-01-01“…To improve the connectivity in mobile wireless sensor networks,an adaptive GTS(guaranteed time slot) allocation algorithm with nodal mobility awareness was proposed.At first,the nodal location in next state was given by Kalman filters forecasting model.Then,a method that considered velocity,direction and relative mobility was used to define mobility level,based on which the nodal priorities for GTS reservation could be determined initially.Subsequently,the priorities could be adjusted adaptively according to the usage status feedback from allocated slots.Finally,the priorities could be used to determine the order for using GTS and the right of use an extra reservation slot.Simulation results show that the proposed scheme could increase the success rate of random access and ensure a lower average packets transmission delay and higher delivery ratio.Furthermore,with the adaptive adjustment scheme for reservation priorities base on usage feedback,the rate of correct utilization of allocated slots is increased significantly in the overall networks.…”
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11492
Optimizing vehicle routing and scheduling under time constraints
Published 2024-01-01“…This paper presents a two-stage algorithm for Vehicle Routing Problem with Time Windows. …”
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11493
Passive Infrared Sensing Using Plasmonic Resonant Dust Particles
Published 2012-01-01“…Here, we present a computational design algorithm along with experimental results that validate the design methodology.…”
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11494
Robust Estimation of the Unbalance of Rotor Systems Based on Sparsity Control of the Residual Model
Published 2018-01-01“…With the help of the sparsity of external disturbances, the unbalance identification is converted into a convex optimization problem and solved by a sparse signal reconstruction algorithm. Experiment results have shown that the proposed method is robust and effective in identifying the unbalance of rotor systems in a complex environment, improving the precision of unbalance estimation and simplifying the balancing process.…”
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11495
Improvement of and Parameter Identification for the Bimodal Time-Varying Modified Kanai-Tajimi Power Spectral Model
Published 2017-01-01“…Based on the Kanai-Tajimi power spectrum filtering method proposed by Du Xiuli et al., a genetic algorithm and a quadratic optimization identification technique are employed to improve the bimodal time-varying modified Kanai-Tajimi power spectral model and the parameter identification method proposed by Vlachos et al. …”
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11496
Parallel RFSAI-BFGS Preconditioners for Large Symmetric Eigenproblems
Published 2013-01-01“…The overall RFSAI-BFGS preconditioned Newton algorithm has shown comparable efficiencies with a well-established eigenvalue solver on all the test problems.…”
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11497
Uplink assisted downlink channel estimation method of extra-large scale MIMO-OTFS system
Published 2023-12-01“…A low complexity downlink channel estimation method for high-speed mobile scenarios was proposed for the extra-large scale multiple-input multiple-output (MIMO) orthogonal time-frequency space (OTFS) system.Different from the existing studies, the proposed method considers the significant spatial non-stationary characteristics of extra-large scale MIMO-OTFS system.Based on the visible path region, an enhanced sparse orthogonal matching pursuit (OMP) algorithm with low complexity was proposed, uplink-assisted downlink channel estimation was achieved using the mapping relationship between the uplink and downlink channels in the frequency-division duplex (FDD) mode.Simulation results show that the proposed uplink-assisted downlink channel estimation method can accurately represent the non-stationary of the system, and achieve significant improvement in the channel estimation performance while reducing the computational complexity , and still perform well in high-mobility IoT scenarios.…”
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11498
On Mixed Equilibrium Problems in Hadamard Spaces
Published 2019-01-01“…We then prove a strong convergence of the resolvent and a Δ-convergence of the proximal point algorithm to a solution of the mixed equilibrium problem under some suitable conditions. …”
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11499
Fault Detection and Diagnosis in Process Data Using Support Vector Machines
Published 2014-01-01“…PCA-SVM and SVM-RFE can effectively detect and diagnose these common faults. In RFE algorithm, all variables are decreasingly ordered according to their contributions. …”
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11500
Assessment of the food security level in the regions of the European North of Russia based on benchmarking methodology
Published 2020-12-01“…On the basis of the author’s methodology, the study develops an algorithm for the benchmarking procedure and tests it on the subjects of the North-West Federal District. …”
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