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Copyright of Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To overcome AMR s limited generalization and low classification accuracy in non-cooperative communication contexts with low signal-to-noise ratio, this paper proposed a model named CGDNN, which integrated CNN, GRU and deep neural networks. To mitigate noise impact on modulation detection, this paper initially denoised I/Q sampled signal using wavelet thresholding. Subsequently, this paper utilized CNN and GRU for extracting spatial and temporal features from signals before proceeding to classification through fully connected layers. Besides enhancing AMR performance, the CGDNN model significantly reduced computational complexity compared to competitors. Experiment results demonstrate an average recognition accuracy of 64.32% on the RML2016. 10b dataset, with an enhancement in signal classification accuracy from 12 dB to 0 dB. Moreover, the model substantially decreased confusion between 16QAM and 64QAM, achieving a peak recognition accuracy of 93.9% at 18 dB. CGDNN model effectively improved AMR detection accuracy under low signal-to-noise ratio conditions and enhanced model training efficiency. [ABSTRACT FROM AUTHOR]

The existing change detection methods are difficult to balance local features and global features, and the boundary between change objects and backgrounds is blurred, so this paper proposed a remote sensing image building change detection method based on local-global feature coupling and boundary guidance. In the encoding stage, the method adopted parallel convolutional neural network and Transformer to extract the local features and global representation of remote sensing images, respectively. At different scales, the local-global feature coupling module fused local features and global feature representation to enhance the expression ability of image features. In addition, it introduced the boundary guidance branch to obtain the prior boundary information of the change objects, so that its guide change map can highlight the structural characteristics of the building and promote the accurate boundary location. This paper conducted experiments on the LEVIR-CD and WHU datasets, resulting in F1-score of 91.25% and 91.27%, IoU of 83.90% and 83.95%, respectively. The experimental results show that the method has a great improvement in the detection accuracy and good generalization ability. [ABSTRACT FROM AUTHOR]

Aiming at the high computational cost of traditional compressed sensing algorithms, this paper proposed a sparse imaging algorithm based on depth expansion model from the perspective of sparse signal recovery. Firstly, it constructed a complex sparse reconstruction network VAMP-Net. In VAMP-Net, it divided complex regressive echo signal into real part and imaginary part as input. Secondly, it substituted the input into the iterative block based on VAMP algorithm. Finally, it carried out the optimal nonlinear sparse transformation by convolutional neural module to obtain the recovered real part and imaginary part signals, and then merged them to obtain the restored target image. As for the proposed algorithm, this paper used artificial data sets to conduct simulation experiments under different target density, iteration times and noise environment, and compared with the traditional iterative shrinkage threshold algorithm and deep learning reconstruction algorithm. Then it used the measured data with different sparsity for field measurement verification. Experimental results show that the image reconstructed by this algorithm has better performance in NMSE, TBR, reconstruction speed and memory usage. [ABSTRACT FROM AUTHOR]

Underwater image quality degradation has seriously hindered the development of marine engineering technology. Aiming at the problems of underwater image color distortion, low contrast and uneven brightness, in order to solve the special underwater imaging environment cause the above degradation problems, and facilitate the subsequent research work based on underwater images, this paper proposed an underwater image enhancement network model based on self-calibrated illumination framework. The network model integrated self-calibrated illumination module on the basis of convolutional neural network, which could brighten images quickly and flexibly. The method established a cascaded lighting learning process with weight sharing in the self-calibrated illumination module to process underwater images. Considering the computational burden of cascaded pattern, the method also constructed a self-calibrated module to realize the convergence of the results of each stage. This self-calibrated module reduced the computational cost greatly and realized the automatic adjustment of underwater image brightness. Finally, this paper analyzed the experimental results qualitatively and quantitatively, and compared eight advanced enhancement algorithms. The results show that the proposed method is obviously superior to other compared algorithms. The results of the proposed method improve the contrast, correct the color, improve the uneven brightness, and enhance the visual effect. The qualitative and quantitative analysis results show the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR]

To improve the problem that existing stereo matching algorithms have difficulty in maintaining a good balance between higher parallax estimation accuracy and faster model inference speed, this paper proposed an efficient and accurate multi-layer cascaded recurrent stereo-matching network. Firstly, this paper designed a multilayer network to introduce position encoding and self-attention mechanisms on the higher resolution feature maps, then updated the disparity values using the disparity refinement strategies of hierarchical recurrent refinement, cascaded refinement, and recurrent refinement to recover the detailed information of stereo images better. In addition, this paper improved the method of disparity iterative update by using a light- weight group correlation layer at a low scale and an adaptive group correlation layer at a large scale to update the disparity values, which reduced the computational effort of parallax iterative update and improved the inference speed of the model. The experimental results show that the proposed algorithm has a faster model inference speed than others while achieving a competitive parallax estimation accuracy. [ABSTRACT FROM AUTHOR]

Aiming at the problems of poor image recognition robustness and poor model generalization in camouflaged object segmentation, inspired by the receptive field structure of the human visual system in neuroscience, this paper proposed a polarization imaging camouflage target detection method based on the receptive field network of focused attention. According to the polarization imaging target detection needs, it constructed the polarization imaging dataset that could effectively contain the background noise as well as obtain the detailed features of the target. The proposed method based on the recognition and localization network framework, which could effectively improve the discriminability and robustness of camouflaged target features by improving the feature extraction module and the decoder module, which exploited the relationship between the eccentricity and the size of the receptive field to cover multi-scale target information. The experimental validation carries out using a self- constructed dataset on multiple typical targets and comparing the subjective visual and objective evaluation metrics of the segmentation results with classical algorithms, and the results of the ablation experiments validate the effectiveness of the present segmentation method. [ABSTRACT FROM AUTHOR]

Existing studies based on convolutional neural networks mainly focus on the accuracy of image reconstruction, ignoring problems such as excessive parameters, insufficient feature extraction, and resource waste. In response to the above, this paper proposed multi-frequency feature extraction network (MFEN), which designed a lightweight lattice information interaction structure and used channel segmentation with multi-mode convolution combination to reduce the number of parameters. By separating the low-frequency, mid-frequency, and high-frequency information of the image and extracting the feature heterogeneity, it improved the expressiveness and feature differentiation of the network, made the network pay more attention to the restoration of texture detail features, and reasonably allocated the computational resources. In addition, it integrated the local binary pattern (LBP) algorithm into the network to enhance texture sensitivity, which further improved the network s ability to extract details. It experimentally verifies that the proposed method balances complexity and performance well. In the 2X zooming experiments on the Set5 dataset, compared to the conventional image super-resolution algorithm (SRCNN) based on convolutional neural network and the newer algorithm (MADNet), the peak signal-to-noise ratio (PSNR) of the proposed method is improved by 1.31 dB and 0. 12 dB respectively, and the number of parameters is reduced by 55% compared to MADNet. [ABSTRACT FROM AUTHOR]

Mainstream knowledge graph-based recommendation model rarely consider the relationship between source nodes and target nodes when fusing high-order information, leading to the introduction of too much noise information and thus affecting recommendation performance in complex network scenarios. To address this problem, this paper proposed a knowledge graph recommendation model with integrated meta-graph neighborhoods, with the goal of reducing the impact of noise information by constructing and integrating meta-graph neighborhoods, thereby improving recommendation performance. Firstly, the model obtained the initial similar sequence of the source node based on meta-graph similarity. Then, the model enhanced the initial sequence using self-attention networks and linear networks, which resulted in a set of enhanced feature vectors that serve as the meta-graph neighborhoods of the node. Secondly, the model designed an attention mechanism based on the user s different preferences for each meta-graph to perform convolution and aggregation on the resulting meta-graph neighborhoods. Then, the model integrated the meta-graph neighborhoods into the source node to enhance the feature representation of the source node. Finally, the model used the inner product of the enhanced vector and the user vector as the probability of user interaction with the item, which was then utilized to complete the recommendation. Experimental results on the MovieLens-20M and Last-FM datasets show that the proposed model achieves an AUC of 97.3% and 94.3%, and F₁-score of 83.1% and 75. 6%, respectively. The recall@50 are 35.4% and 31.7%, respectively. These performance metrics outperform models such as NGCF, KGCN, LKGR, and other models. The results demonstrate that the knowledge graph recommendation model with integrated meta-graph neighborhoods is effective in improving recommendation performance. [ABSTRACT FROM AUTHOR]

Copyright of Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Most of the Encryption-then-Compression (ETC) methods can only obtain several limited fixed compression ratios. However, arbitrary encryption compression ratios instead of limited fixed compression ratios are more suitable for practical requirements. To this end, this paper proposed a lossy compression algorithm for encrypted color images with arbitrary compression ratios. It combines the uniform and random downsampling to compress the encrypted images, obtaining arbitrary compression ratios of an encrypted image. The receiver receives the compressed sequence of the encrypted image and obtains the decrypted image by decompression and decryption. The proposed scheme then characterizes the lossy reconstruction of the original image from the decrypted image as an optimization problem with the downsampling compression-based constraint. This scheme designs a convolutional neural network-based image reconstruction model for lossy ETC to resolve this problem, which is denoted the ETC-oriented Reconstruction Network (ETRN). ETRN consists of shallow feature extraction (SFE), residual in residual (RIR), residual content supplementation (RCS), and down-sampling constraint (DC). The experimental simulation results show that the encrypted color image lossy compression algorithm proposed in this paper can obtain excellent compression and reconstruction performance, which fully demonstrates the feasibility and effectiveness of this method. [ABSTRACT FROM AUTHOR]

Although high-quality and high-resolution depth maps can significantly improve the performance of computer vision tasks in various natural scenes, the limitations of depth camera hardware make the depth maps captured by consumer-level depth cameras have problems such as low resolution, poor quality, invalid holes, etc. Depth super-resolution reconstruction (DSR) is a kind of technology that can effectively improve the resolution and quality of depth maps, and DSR has become a research hot-spot in the field of computer vision. Firstly, this paper introduced the definition of DSR and the research progress of DSR algorithm at home and abroad in recent years, and then mainly stated and analyzed deep learning DSR reconstruction algorithms. Next, it introduced the depth image quality evaluation criteria. Finally, this paper prospected the application fields of DSR and the challenges as well as the opportunities in the future. [ABSTRACT FROM AUTHOR]

Aiming at the problem that the existing single image super segmentation reconstruction methods are difficult to capture complete and effective information in the image, this paper proposed a joint image-frequency supervised image super-resolution reconstruction algorithm, which aimed to utilize the complementary information between multiple domains, thereby obtaining a more complete image feature representation. Firstly, by analyzing the characteristics of image pixels after converting to frequency domain space, this paper proposed a new frequency domain distance supervision loss according to its complex representation, which effectively applied spectral information to the optimization process of convolutional neural networks. Based on the characterization characteristics of different frequency bands in the domain, this paper constructed the spectral weighting loss on the basis of the distance loss in the frequency domain, and applied it to the two frequency bands of low frequency and high frequency respectively. Finally, combined with the supervision of the image domain, it formed a joint optimization of multiple domains and got good performance. The results on Setl4, BlOO and Kodak show that the PSNR and SSIM of the proposed algorithm reach 33.47 dB and 0.985 9, respectively, and the proposed algorithm achieves the best performance compared with several image super-resolution methods. [ABSTRACT FROM AUTHOR]

Aiming at the problem of low interlayer resolution in medical tomographic images, this paper proposed an interlayer super-resolution algorithm based on deformation estimation and motion compensation. The method aimed to enhance interlayer resolution by generating interslice images. Firstly, the algorithm employed U-Net for multi-scale feature extraction and fusion of two adjacent images. To handle the complex deformation of interlayer images, it estimated slice bidirectional deformation by utilizing a warping module based on adaptive collaboration of flows. Multi-scale information fusion module performed feature aggregation on pyramid feature layers, to compensate for the motion of the generated map. Finally, it employed a post-processing network to reduce pixel outliers. The results on two CT datasets show that the PSNR of the proposed algorithm reaches 35.59 dB and 30.76 dB, the output effectively restores image details. Comparative experiments with existing methods demonstrate the effectiveness of the proposed algorithm. [ABSTRACT FROM AUTHOR]

Convolution operations lead to a significant increase in the network size, which makes CNN models difficult to deploy to the embedded hardware platform, and different granularity data is not coordinated with the underlying hardware structure, which leads to low computing efficiency. Based on the reconfigurable array with the computing units supporting multiple bit widths, through software hardware cooperation and reconfigurable computing methods, this paper defined the quantization threshold using KL divergence and random integer method, proposed a strategy for finding the best basis point, designed an instruction set and a parallel mapping scheme supporting multiple bit widths to realize three distinct bit widths in data quantization. The results show the quantization scheme with 8 bit weight and feature map can compress model parameter quantity to about 50% with 2% accuracy loss. The acceleration ratios of quantifying the test images to three different bit widths reach 1.012, 1.273, and 1.556, respectively, which can shorten the execution time by up to 35.7% and reduce memory access times by 56.2%, while only bringing less than 1% relative error. This indicates that this method can achieve efficient neural network computation under three quantization bit widths, thereby implementing hardware acceleration and model compression. [ABSTRACT FROM AUTHOR]

In recent years, convolutional neural networks have been widely used in various fields of computer vision and achieved remarkable results. Regularization method is an important part of convolutional neural network, which helps to avoid the overfitting phenomenon of convolutional neural network in the process of model training. There are fewer reviews on regularization methods for convolutional neural networks, and most of them lack a summary of the newly proposed regularization methods. Firstly, this paper conducted a detailed summary of the literature on regularization methods in convolutional neural networks, and classified the regularization methods into parameter regularization, data regularization, label regularization and combinatorial regularization. After that, on the public datasets such as ImageNet, it compared and analyzed the advantages and disadvantages of different regularization methods based on evaluation indexes such as top-1 accuracy and top-5 accuracy. Finally, it discussed the future research trends and work directions of regularization methods for convolutional neural network. [ABSTRACT FROM AUTHOR]

To address the low utilization of raw data and insufficient feature extraction capability of multi-dimensional data in existing remaining useful life prediction methods, this paper proposed a convolutional neural network model based on feature enhancement and spatio-temporal information embedding. Firstly, it adopted a feature enhancement module to extract additional operating condition features and manual features from raw data as auxiliary features. Then, it introduced the spatio-temporal embedding module to encode the spatio-temporal information, embedding the time series information and spatial feature information into the original data. Finally, it concatenated the aforementioned features, and it employed a regression prediction module to capture the inherent relationships in the data and obtain regression prediction results. It evaluated the predictive effectiveness of the proposed model on the commonly used commercial modular aero-propulsion system simulation(C-MAPSS) dataset. The experimental results show that the root mean square error of the proposed model decreases by 8.8% on average over the four subsets compared with other mainstream deep learning methods, and it also outperforms existing state-of-the-art algorithms in prediction accuracy under multiple operating conditions and fault types. The experiments fully verify the effectiveness and accuracy of the proposed model in predicting the remaining useful life of turbofan engines. [ABSTRACT FROM AUTHOR]

In order to solve the problem of strong popularity bias in recommendation lists generated by Bayesian personalized ranking algorithm under the condition of unbalanced data, this paper designed a hybrid recommendation algorithm based on feature embedding to remove popularity bias. Firstly, this paper used convolutional neural network to extract user and item features, determine user preferences, and fill original unbalanced data according to user preferences. Secondly, this paper embedded the user preference features extracted from convolutional neural network into the Bayesian personalized ranking algorithm for hybrid recommendation. Finally, it trained the mixed recommendation model with score filled data, and obtained the personalized ranking list without popularity bias. In order to verify the performance of the algorithm, it conducted the analysis and comparison experiments on Movielens-100 K and Movielens-1 M. And the experimental results show that the popularity bias is reduced by about 50%～60% and the accuracy is improved by about twice. [ABSTRACT FROM AUTHOR]

Mild cognitive decline is the early stage of Alzheimer's disease, and the feature extraction and classification of mild cognitive decline using EEG signals is an important method for diagnosing mild cognitive decline. In the automatic detection technology of mild cognitive decline based on electroencephalogram artificial intelligence, the existing research only extracted a certain feature in the electroencephalogram signal or simply concatenates multiple features, which caused these methods to fail to well consider the correlation between different features and it would cause the problem of dimensional disaster. This paper proposed a convolutional neural network based automatic detection algorithm for resting state electroencephalogram data of mild cognitive decline. By extracting the power spectrum and brain network features of the electroencephalogram, it fused the two features by matrix operation, and designed a convolutional neural network to classify the fused features. This method achieves a high accuracy rate on the data set collected by a hospital in Shanghai. In addition, by inputting different subsets of the feature set, this method found the few groups of features that contribute the most to mild cognitive decline, thereby it also had a certain interpretability. Experiments on the dataset of this paper, it p roves the advantages of the power brain network for the automatic diagnosis of mild cognitive decline. [ABSTRACT FROM AUTHOR]

This paper proposed a natural language sentence matching method that combined high-level and low-level semantic information to solve the problems about current natural language sentence matching method fail to integrate common semantic information and it is difficult to capture deep-semantic information. First of all, the method used pre-trained word vector GloVe and character-level word vector to obtained the word embedding representation of sentence P and sentence Q. Secondly, this paper encode red P and Q with bidirectional LSTM, then it contained low-level semantic information through preliminary fusion of P and Q. Thirdly, this paper calculated bidirectional attention between P and Q, then spliced them together to get semantic representation, afterwards it calculated its self-attention to obtained high-level semantic information. Finally, this paper used a heuristic fusion function to fuse the low-level semantic information with the high-level semantic information to obtain the final semantic representation, and it used a convolutional neural network to prediction answers. This paper evaluated the proposed model on two tasks, such as recognition textual entailment, paraphrase recognition. This paper conducted experiments on the SNLI dataset and the Quora dataset. The results show that the accuracy of the proposed algorithm on the SNLI test set is 87. 1%, and the accuracy of the Quora test set is 86. 8%, which verifies the effectiveness of the algorithm in the task of natural language sentence matching. [ABSTRACT FROM AUTHOR]

To solve the problem of insufficient real-time performance of existing optical flow estimation methods, this paper proposed a lightweight improved PSC-NET model with deep separable convolution ( depth pyramid, warping and cost volume, DS-PWC). One of the improvements was decoupling the conventional two-dimensional convolutional network layer into a deep separable convolutional layer. The other one was adding a weight coefficient based on the number of layers in the pyramid layer by DS-PWC, which greatly reduced the number of model parameters in the network structure without loss of precision. In addition, in the training process, the paper applied data enhancement technologies such as I+ ORE to further improve the generalization ability of estimation and prediction results. The experimental results show that the DS-PWC model was tested in the dataset and the operating efficiency reaches about 58 fps while maintaining the quality. To verify the effectiveness of the algorithm, this paper carried out the ablation experiments of model structure and data enhancement. The results verify the effectiveness of the DS-PWC model. [ABSTRACT FROM AUTHOR]

The image rain removal algorithm analyzes and processes rain images to remove rain streaks and restore clean background scenes, which helps to improve the recognition accuracy of computer vision task, so that it becomes a hot spot in current research. In order to systematically understand the current research status and development trends in this field. Firstly, this paper introduced some typical synthetic rain models. Secondly, it analyzed typical image rain removal algorithm models and methods from two aspects, such as model-driven and data-driven. Then it compared the algorithm evaluation metrics and public rain datasets respectively. Finally, this paper prospected the future development trend of single image rain removal algorithms. [ABSTRACT FROM AUTHOR]

This paper proposed a self-encoding salient region extraction algorithm based on multi-layer convolutional to solve the problem that the existing convolutional neural network wasn’t sufficient in extracting image features, which led to the poor effect of salient extraction. When convolutional networks were used to extract image features, the shallow convolution features generally extracted the detailed features of the image, such as color, texture and location features, and the deep convolution features were generally referred to the semantic features of the image. On the coding layer, this algorithm downsampled the shallow convolution features and fused them into the deep convolution features, and upsampled the deep convolution features to the shallow convolution feature. Experiments show that this method can greatly improve the coding quality. In the decoding, it also fused the convolutional features by encoding to obtain the lost information in the decoding and also obtained a better decoded image. In addition, this paper designed a layer-by-layer supervision method to guide the training of the decoding layer, which used the standard region extraction map by down-sampling as the standard image for supervision training. The experimental results show that this algorithm can increase the F-measure by 0.071 on the basis of PAGRN, and reduce the MEA by 0.031 on average. [ABSTRACT FROM AUTHOR]

The currently widely used lightweight neural networks still have the problems such as large number of calculations and parameters, which make cheap mobile devices with low computation resources cannot quickly complete the image classification tasks. Aiming at this problem, this paper proposed a lightweight neural network that was more suitable for using on cheap mobile devices with low computation resources. This paper introduced cheap linear operations and concatenations of feature maps to reduce the number of calculations and parameters of the neural network. Also, this paper introduced improved residual structure, attention mechanism and label smoothing to improve the accuracy of result. Experiments based on PD-38 dataset show that the proposed neural network can achieve higher classification accuracy by using a smaller number of calculations and parameters than traditional lightweight neural networks. Experiments on the public dataset CIFAR-10 further show that the neural network is universal. [ABSTRACT FROM AUTHOR]

For ESC, this paper proposed a convolutional neural network method based on multi-resolution features and time-frequency attention module. Firstly, compared with the single-resolution spectrogram, multi-channel and multi-resolution features could enrich feature information, realize information complementarity among different feature resolutions, and enhance the expression ability of features. Secondly, for sound signals, this paper proposed a time-frequency attention module. The module firstly used different sizes of one-dimensional convolution to focus on the effective information in the time domain and frequency domain, and then used two-dimensional convolution to fuse the two-domain information to suppress the background noise in the environment sound and eliminate redundant information interference caused by multi-channel and multi-resolution features. The experimental results show that the classification accuracy rates on the two benchmark data sets of ESC-10 and ESC-50 have reached 98.50% and 88.46%, which are 2.70% and 0.76% higher than the latest methods. [ABSTRACT FROM AUTHOR]

In order to recognize complex interactive actions, this paper proposed a feature learning method based on depth information, and used a two-layer classification strategy to solve similar action recognition problems. The method analyzed the depth image action sequence from the frequency domain, extracted the frequency domain features, used VAE for spatial feature compression representation, established HMM to simulate time series changes and performed the first layer action recognition. In order to solve the problem of similar actions, this paper introduced three-dimensional joint point features for the second layer action recognition. Experimental results show that these two types of features can effectively represent the meaning of gestures on the SBU-Kinect action data set, the strategy is simple and effective and can get high recognition accuracy. [ABSTRACT FROM AUTHOR]

Copyright of Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To solve the problem of combustion state recognition in solid oxide fuel cell (SOFC) combustor, this paper proposed a combustion state recognition method based on attention mechanism and image feature pyramid. The method adopted the adaptive gamma correction with weighting distribution (AGCWD) to standardize the input images. It combined two single full connections with 1×1 convolution to replace the squeeze and excitation structure, and proposed a hybrid attention structure combined with spatial attention structure to enhance the ability of feature extraction. To provide multi-scale information communication capability, it constructed the multi-scale bidirectional fusion pyramid by means of bidirectional computation and multi-scale fusion. The experimental results show that the proposed method reaches 99.22% accuracy under the premise of 3.98 M parameters and 397 M floating point operations (FLOPs), and effectively identifies the combustion state in SOFC combustor. [ABSTRACT FROM AUTHOR]

The function of recommendation system is to help users actively finding personalized items that meet theirs preferences and recommend them to users. Collaborative filtering algorithm is a classic algorithm in recommender system, but it is limited by cold start of data and sparsity and has disadvantages such as poor interpretability and poor model generalization ability . This paper studied its shortcomings. By taking the original score matrix in the form of user-project bipartite graph as input, designing the figure convolution neural network as a variant of graph autoencoder, which was obtained by the latent vector of user and item by iteratively aggregating neighbor node information, and combining CNN, this paper proposed a recommendation algorithm based on convolution matrix decomposition to improve the interpretability of the model and generalization ability. And also solved the auxiliary information fusion the data sparseness, and made recommendation performance improved by 1.4% and 1.7% . It provides a new idea for recommendation direction based on graph neural network in the future. [ABSTRACT FROM AUTHOR]

In order to solve the problems of high computational complexity, large computational cost and large number of parameters, this paper proposed the parallel group convolution algorithm based on the domestic SW26010P multi-core processor. The core idea was to use the unique data layout, through the multi-core mapping processing, parallel computing. Experimental results show that compared with single-core serial algorithm, the proposed parallel group convolution algorithm can achieve the highest speed-up ratio of 79.5 and the maximum effective computing power of 186.7MFLOPS. After data parallel optimization of the parallel group convolution algorithm by SIMD instruction, the algorithm obtains the highest speed-up ratio of 10.2 compared with the parallel group convolution algorithm before optimization. [ABSTRACT FROM AUTHOR]

Expert recommendation is one of the research hotspots in the online Q&A community. However, the majority of the currently used algorithms concentrate on matching user's static interest and question information, ignoring the efficient capture of user' s dynamic interest representation information, which results in a lack of recommendation accuracy. In order to address the aforementioned issues, this paper proposed an expert recommendation algorithm for the Q&A community that incorporated multi-head self-attention. Firstly, this algorithm built out question encoders of convolutional neural networks and attention mechanisms to process target question and user' s historically answered questions, in order to extract the corresponding question representations. Secondly, it treated the sequence of user's historically answered questions as a time series and used the multi-head self-attention mechanism to learn the dynamic interest representations hidden in the sequence, and combined with the user' s static interest representations to obtain the user' s comprehensive interest representations. Finally, it calculated the similarity between the target question representation and the comprehensive user representation to generate recommendation results. Based on the real data from the Zhihu Q&A community, the experimental results show that the performance of this algorithm is significantly better than the current popular expert recommendation algorithm. [ABSTRACT FROM AUTHOR]

Most of the existing steganalysis methods have weak generalization ability and cannot effectively detect unknown steganalysis algorithms, which makes the accuracy of their classification greatly reduced in the practical application process. To solve this problem, this paper proposed an image steganalysis method based on group convolution and snapshot ensembling（Snapshot Ensembling steganalysis network, SENet）. Firstly, residual convolution block and group convolution block are used to extract the features of the image. Secondly, the model with the best performance is obtained as the snapshot model in each training period. Finally, the selected snapshot models are integrated to classify the images. This method uses the techniques of group convolution and snapshot ensembling to avoid the high training cost of traditional integration methods and the limited generalization ability of a single classifier. Experimental results show that this method can improve the accuracy of steganographic analysis model, and can effectively classify when the training set and test set are mismatched, and has high model generalization ability. [ABSTRACT FROM AUTHOR]

Traditional manually designed feature descriptors are prone to cause a large number of mismatches in the face of multi temporal remote sensing images with large geometric and radiation differences and obvious changes in ground features. This paper developed a convolutional neural network matching algorithm with double screening and proposed double constraints to extract the deep semantic feature map of the image through CNN, it selected the key points that satisfied both the priority maximum principle and the precise extreme value principle from the feature map, and extracted 512-dimension descriptors from the corresponding positions. In the feature matching stage, the strategy of combining the rough to fine reverse matching constraints and RANSAC constraints ensured that the false matching points were eliminated effectively, and retained a certain number of correct matching points, which improved the matching accuracy. The experimental results show that the number of matches is moderate, the correct matching rate is improved compared with other algorithms selected in the experiment, and the image registration error is reduced by about 2 pixels. The running time is obviously improved, matching effect is good, with certain adaptability and robustness. [ABSTRACT FROM AUTHOR]

In the field of spectrum monitoring, it is difficult to identify wideband spectrum signals because of wide frequency band and limited receiver sampling steps. This paper proposed a spectrum signal identification method combining frequency-domain superposition preprocessing and object detection. The domain superposition method accumulated multiple frames of spectrum data to highlight weak signals in the spectrum, then sent the spectrum images to the improved object detection network for signal type identification. Experiments show that the proposed method can effectively identify 7 kinds of spectrum signals. The proposed frequency-domain superposition preprocessing can improve the accuracy of the object detection algorithm and improve the identification ability of weak signals in the spectrum. When the signal-to-noise ratio is 6 dB,the algorithm can achieve an average recognition rate of 89. 7%. [ABSTRACT FROM AUTHOR]

In order to solve the problem that the Transformer model cannot apply to mobile devices with limited computational resources due to its huge number of parameters and computational complexity, this paper proposed a mobile-friendly lightweight image recognition network called FuseNet. FuseNet utilized convolutional neural network to extract local feature information and self-attention to excel in modeling global information, and it integrated the features of both local and global representations into a single feature extraction module, which efficiently combined the advantages of the two different structures to achieve a high accuracy with a small model size. Experiments demonstrate that FuseNet with different model sizes can achieve good performance without using pre-training and it can well apply to mobile devices. FuseNet-B achieves 80. 5% accuracy with 14. 8 M parameters on ImageNet-1 K dataset, the performance exceeds the same volume of Transformer models and convolutional neural networks. [ABSTRACT FROM AUTHOR]

The research in 3D human pose estimation from 2D images has achieved great success in recent years. However, the performance of existing 3D human pose estimation methods may degrade significantly in complicated scenarios. To improve the accuracy and robustness of 3D human pose estimation in unconstrained scenarios, this paper proposed ARGP-Pose, a monocular 3D pose estimation framework by exploring the relationship between the joint points of a 3D human pose. To be more specific, the proposed method included a new joint point preprocessing method and a 3D pose estimation network. The preprocessing method enhanced structural features and extracted the relationship among joint points, which were used as input of the following pose estimation network. Also, the proposed network fused local information of each joint point and the global information of the overall pose for rich feature extraction. Additionally, the proposed method extracted the temporal information by using a self-attention module, which achieved further performance boost. Last, for a complex human pose, this method decomposed the prediction of the whole pose into the prediction of each point, which again improved the estimation accuracy for human bodies with complex pose variations. The experimental results obtained on several well-known benchmarking datasets, such as Human3.6M and HumanEva-I, demonstrate the merits and superiority of the proposed method. [ABSTRACT FROM AUTHOR]

Due to the low randomness of character distribution and high randomness of word combination in word-based DGA domain names, the traditional detection methods are difficult to identify them. The method based on deep learning such as LSTM can capture domain's sequence features, but it lacks the word combination features and has low detection accuracy. In order to solve above problems, this paper proposed a new DGA domain name detection method based on fusion embedding layer. In domain embedding stage, it carried out a fusion vector representation based on characters and word segmentation technology . Then, it constructed a hybrid deep learning model based on CNN and BiGRU. The experimental results show that the proposed model has increased by 3 . 1 % and 4. 3% respectively in accuracy compared with the models based on CNN or LSTM alone. When dealing with the matsnu, suppobox and ngioweb DGAs, the proposed model is more effective. [ABSTRACT FROM AUTHOR]

At present, there are two major problems in the mainstream web page extraction methods: the extraction information type is single, and it is difficult to obtain multiple kinds of news information. More reliance on HTML tags, its difficult to extend to different sources. Therefore, this paper proposed an information extraction method of news Web pages based on multidimensional text features. It divided writing, semantic and location features into writing features by using the writing features of news texts. And it used multi-channel convolutional neural network to fuse multi-dimensional text features to extract multiple types of news Web pages. Only a small amount of data set training was required to extract news Web page information from new sources. Experimental results show that the performance of this method is better than the current optimal method. [ABSTRACT FROM AUTHOR]

Because convolutional neural networks( CNN) mostly focus on global feature learning and ignore local feature information containing more details, it is difficult to improve the accuracy of indoor scene recognition. To solve this problem, this paper proposed an indoor scene recognition method based on improved global-local attention network ( GLANet). Firstly, it used GIAN et to capture the global and local features of the scene image to increase the detail information of the image features. Then, it introduced a non-local attention module into the local network to further preserve the detail features of the image through the convolution of attention diagram and feature graph. Finally, it used various features of different stages of the network for classification. Through training and verification on the MIT lndoor67 and the SUN397 dataset, the recognition accuracy of the proposed method was increased by l. 98% and 3. 07% respectively compared with the LGN method. Experimental results show that the algorithm can effectively capture global semantic information and fine spatial details, and significantly improves the recognition accuracy. [ABSTRACT FROM AUTHOR]

Most of the current fake face detection technologies use deep learning to identify the feature differences between real videos and fake videos, and have achieved good results on uncompressed videos. But the detection performance on compressed video will be severely reduced. Therefore, this paper proposed a fake face video detection method based on improved triplet loss to tackle the above problem. Firstly, it used an artifact map generated by the artifact map generator to deepen the feature difference between the fake face and the real face. Secondly, it used improved triplet loss to solve the problem of hard samples that were difficult to detect correctly. Finally, it chose a deep learning network that was more suitable for fake face detection to extract convolutional features. Experiments on the FaceForensics++ dataset show that proposed method is better than other state-of-the-art methods. [ABSTRACT FROM AUTHOR]

A single semantic category label cannot describe comprehensively the image content because remote sensing images contain various object categories. The task of multi-label image classification is more challenging. By exploring the depth graph convolutional network(GCN), this paper made up for the lack of relevance of label semantic information in multi-label remote sensing image classification, proposed a new multi-label remote sensing image classification network, multi-label remote sensing image classification network based on the GCN. It contained three parts: image feature learning module, classifiers learning module based on GCN, and image feature differentiating module. Compared with the related models on the public multi label remote sensing datasets planet and UCM, the method can get better classification results on the multi label remote sensing image classification task. The method used modules such as graph convolution to apply multi-label image classification methods to remote sensing, which improved the model classification ability and shortened the model training time. [ABSTRACT FROM AUTHOR]

In order to solve the problems of insufficient feature extraction of sEMG end-to-end gesture recognition and low accuracy of multi-gesture recognition, this paper proposed a multi-stream convolutional EMG gesture recognition network model fusing attention mechanism. The proposed model generated sub-myoelectrograms from multi-channel time-domain sEMG through sliding windows and used a multi-stream convolutional neural network to fully extract the semantic features of each sampled channel sEMG, and then aggregated them to obtain rich multi-channel gesture semantic features. At the same time, the proposed model calculated the attention distribution map of semantic features from temporal and feature channel dimensions to strengthen the useful features and weaken the useless features, further improved the accuracy of multi-gesture recognition. The experiment used the Ninapro dataset for training and testing and compared with the mainstream electromyogram recognition model. The experimental results show that the proposed model has better performance in recognition accuracy, which proves the effectiveness of the proposed model. [ABSTRACT FROM AUTHOR]

Aiming at the problems of limited annotation data, scarce corpus and slow progress of Khmer sentence-level sentiment analysis, this paper proposed a Khmer sentence-level sentiment classification method based on deep semi-supervised CNN model. This method combined the separate convolution for word and lexicon embeddings, used a small amount of existing Khmer sentiment lexicon resources to improve sentence-level sentiment classification task performance. First, it constructed the word and lexicon embeddings of Khmer sentence, used different convolution kernels to convolve two-part embeddings respectively, integrated the existing sentiment lexicon information into the CNN model. After the max-over-time pooling, obtaining the maximum output feature. The maximum output features of the two parts were stitched together as the input of the full connection layer. And then, it used the semi-supervised learning method of temporal ensembling training the deep neural network, reduced the need for annotated corpus, and further improved the accuracy of the model’s sentiment classification. The result proves that through the semisupervised method of temporal ensembling model training, the accuracy of this method is 3.89% higher than that of the supervised method in the Khmer sentence-level sentiment classification task when the artificially labeled data is the same. [ABSTRACT FROM AUTHOR]

The size of the receptive field of the convolutional neural network is related to the size of the convolution kernel. And the traditional convolution uses a fixed-size convolution kernel, which limits the feature perception ability of the network model. In addition, due to the parameter sharing mechanism of the convolutional neural network, it used the same feature extraction method for all pixels in the spatial region. However, there are differences in the distribution of noise signals and clean speech signals in the noisy spectrogram, especially in the complex noise environment, the general convolution method is difficult to achieve high-quality speech signal feature extraction and choosing. In order to solve the above problems, this paper proposed a multi-scale region adaptive convolution module, which used multi-scale information to improve the feature perception ability of the model and automatically allocated the area adaptive convolution achieve and improved the denoising ability of the model. The experiments on the TIMIT public datasets show that the proposed algorithm has achieved satisfactory results in the metrics of speech quality and intelligibility. [ABSTRACT FROM AUTHOR]

In order to ensure the normal operation of the equipment and to predict the remaining life of the bearing, this paper proposed a life prediction model based on the combination of two-dimensional convolutional neural network and an improved WaveNet. To overcome the gradient vanishing problem of the unoptimized recurrent networks in the process of prediction training, the WaveNet time-series networks structure was introduced into the model. Aiming at the situation that the original WaveNet structure was not suitable for rolling bearing vibration data, the improved WaveNet structure combined with two-dimensional convolutional neural networks was applied to the life prediction of rolling bearing. The model extracted the features of one-dimensional vibration sequence using two-dimensional convolutional networks, and then input the features to the WaveNet to predict the remaining life of the rolling bearing. Compared with the deep recurrent networks, the combined model has higher computational efficiency and more accurate results. Compared with the CNN-WaveNet-0 model, the improved model has more accurate prediction results. Compared with the deep long short-term memory networks model, the root mean square error of the prediction results of this model is reduced by 11.04%, and the scoring function of the prediction results is reduced by 11.34% . [ABSTRACT FROM AUTHOR]