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1241
Douglas' Factorization Theorem and Atomic System in Hilbert Pro-$C^{\ast}$-Modules
Published 2024-03-01“…We also demonstrate some properties of the $K$-frame by using Douglas' factorization theorem.Finally we demonstrate that the sum of two $K$-frames in a Hilbert pro-$C^{\ast}$-module with certain conditions is once again a $K$-frame.…”
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1242
Timber beam seismic design � A numerical simulation
Published 2019-01-01“…The simulated near-fault ground motion is applied on the fixed base of a timber frame model. The beam is placed in single span of a timber frame. …”
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1243
Content authentication of H.264/AVC video stream based on semi-fragile watermarking
Published 2009-01-01“…For the low bit-rate H.264/AVC video stream,a content authentication scheme was proposed by using semi-fragile watermarking.The energy relationship between two groups of DCT blocks in I frame was utilized to generate content based feature code,which was embedded into low-magnitude DCT coefficients by modifying their signs according to their distribution.An error norm function was introduced to keep the bit-rate relatively stable.Moreover,the frame numbers of P frames were embedded into AC coefficients by utilizing the statistical properties of positive and negative signs.Tamper detection was realized by comparing the extracted watermark and reconstructed authentication code.Experimental results demonstrate the effectiveness of the proposed approach.…”
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1244
Design of DBA algorithm in EPON upstream channel in support of SLA
Published 2005-01-01“…Two new Ethernet control frames: grant frame and request frame were introduced and a novel DBA algorithm supporting multi-user types SLA in EPON system: HPFCT (hierarchy polling with fixed cycle time) was proposed. …”
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1245
On Pseudospherical Smarandache Curves in Minkowski 3-Space
Published 2014-01-01“…In this paper we define nonnull and null pseudospherical Smarandache curves according to the Sabban frame of a spacelike curve lying on pseudosphere in Minkowski 3-space. …”
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1246
A new cooperation spectrum sensing algorithm based on energy detection
Published 2016-09-01“…To improve the reliability of spectrum sensing in cognitive radio system,a new cooperation spectrum sensing algorithm was proposed.In this algorithm,the property of the low probability between adjacent frames of the states change was used and then the decision was made by combing the energy value of the current sensing frame with that of the neighboring frame.Therefore,the proposed algorithm could decrease the miss detection probability in case of the instantaneous signal energy dropping when primary user used the licensed spectrum.Furthermore,theoretical expressions for detection probability and false alarm probability were derived.Finally,theoretical analysis and simulation results verify that the detection performance of the proposed algorithm is better than that of cooperative spectrum sensing which is based on the classical energy detection.…”
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1247
Multi-Indices Quantification for Left Ventricle via DenseNet and GRU-Based Encoder-Decoder with Attention
Published 2021-01-01“…At first, DenseNet is utilized to extract spatial features for each cardiac frame. Then, in order to take advantage of the time sequence information, the temporal feature for consecutive frames is encoded using gated recurrent unit (GRU). …”
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1248
A Retrieval Optimized Surveillance Video Storage System for Campus Application Scenarios
Published 2018-01-01“…Aiming at the challenge that the content-based video retrieval response time is too long, the key-frame index subsystem is designed. The key frame of the video can reflect the main content of the video. …”
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1249
Reliable and Swift Message Broadcast Method in Vehicular Ad Hoc Networks
Published 2015-05-01“…However, the broadcast method specified in the IEEE 802.11p does not have a collision avoidance procedure and receivers do not acknowledge when they receive a broadcast frame. In addition, frames could be lost and corrupted. …”
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1250
Reliable Multicasting Service for Densely Deployed Military Sensor Networks
Published 2015-08-01“…When a receiver node overhears a multicast frame, the pre-ACK is used to announce its reception of the multicast frame to neighboring nodes which then do not need to duplicate the same multicast frame to it. …”
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1251
A Novel Routing Control Technique for the Energy Hole in the Underwater Acoustic Distributed Network
Published 2021-01-01“…The residual energy of the nodes and the changing information of the uplink/downlink matrix are added to the data frames for distribution. The source node specifies the routing path to transmit the data frames based on the changing information, and the relay nodes route the data frames strictly according to the routing path designated by the source node. …”
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1252
A Frequency Domain Method for the Generation of Partially Coherent Normal Stationary Time Domain Signals
Published 1993-01-01“…The factors of the spectral density matrix, [U(f)] and [S(f)], are then used to generate a frame of random data in the frequency domain. The data is transformed into the time domain using an inverse FFT to generate a frame of data in the time domain. …”
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1253
Carrier initial phases estimation for single-channel adjacent-frequency mixture of digitally modulated signals
Published 2016-10-01“…For single-channel mixture of adjacent-frequency digitally modulated signals which have the fixed frame length and sync codes in non-cooperative satellite communications,a carrier initial phases estimation algorithm which can be applied to both low-order and high-order digitally modulated mixtures was provided according to the differences of parameters in the source signals.The sync data eliminated the frequency offset was added in the interval of frame length firstly,then timing synchronization was accomplished for the added result in terms of power maximization rule,thus the initial phases information was derived.Moreover,the modified Cramer-Rao bound (MCRB) of carrier initial phases for single-channel mixture of adjacent-frequency digitally modulated signals was derived for comparison.Simulation results show that,difference between estimation performance of the proposed algorithm and MCRB becomes smaller with the increase in the number of added frames.…”
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1254
Raw Camera Data Object Detectors: An Optimisation for Automotive Video Processing and Transmission
Published 2025-01-01“…In fact, the sensor collects the light intensity value per pixel, but an RGB frame contains 3 values, for red, green, and blue colour channels. …”
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1255
Study of the Impact Irregular Concrete Facilities with the Shear Walls Based: The Effect of Soil-Structure Interaction with ABAQUS Software
Published 2024-03-01“…Three-story frame with concrete shear wall has a significant increase compared to similar frames with more floors, which shows the good performance of this system in structures with fewer floors. …”
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1256
Action recognition method based on fusion of skeleton and apparent features
Published 2022-01-01“…Focusing on the issue that traditional skeletal feature-based action recognition algorithms were not easy to distinguish similar actions, an action recognition method based on the fusion of deep joints and manual apparent features was considered.The joint spatial position and constraints was firstly input into the long short-term memory (LSTM) model equipped with spatio-temporal attention mechanism to acquire spatio-temporal weighted and highly separable deep joint features.After that, heat maps were introduced to locate the key frames and joints, and manually extract the apparent features around the key joints that could be considered as an effective complement to the deep joint features.Finally, the apparent features and the deep skeleton features could be fused frame by frame to achieve effectively discriminating similar actions.Simulation results show that, compared with the state-of-the-art action recognition methods, the proposed method can distinguish similar actions effectively and then the accuracy of action recognition is promoted rather obviously.…”
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1257
Object detection and tracking in video sequences: formalization, metrics and results
Published 2021-03-01“…Examples of frames of processed video sequences with visualization of human movement trajectories are presented.…”
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1258
Nonlinear Seismic Response Analysis of Curved and Skewed Bridge System with Spherical Bearings
Published 2013-01-01“…The superstructure is modeled using 3D frame elements for the girders, truss elements for the cross-frames, and equivalent frame elements to represent the deck. …”
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1259
A Hybrid Measurement Approach to Medium Occupied Time for Radio Resource Management in IEEE 802.11 Networks
Published 2015-05-01“…This paper proposes a hybrid measurement approach to medium utilization using both a signal-level register monitor and a frame-level frame parser. We redefine medium utilization in terms of Medium Occupied Time (MOT) to describe the status of the medium in more detail. …”
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1260
Moving Target Localization in Sports Image Sequence Based on Optimized Particle Filter Hybrid Tracking Algorithm
Published 2021-01-01“…For the image sequence S1, the tracking window of the 20th frame and the 40th frame has a small offset, but the optimal position can be quickly found by Mean Shift iteration. …”
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