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The recommendation system is an important means to solve the "information overload" of e-commerce today. Consumer psychology believes that consumer psychology dominates consumer behavior, and consumer behavior is the external manifestation of consumer psychology. Therefore, the personalized recommendation algorithm of user consumption psychology is studied based on the specific perspective of local group-buying e-commerce. By constructing a user social relationship network, the personalized recommendation algorithm is evaluated and the final recommendation result is obtained. A personalized recommendation model is proposed based on multi-dimensional space, which is compared with the existing personalized recommendation model. The simulation results show that the improved collaborative filtering recommendation method has a large recall rate and accuracy during the daytime. And F value; when the number of recommended results is small at night, the traditional recommendation method has a slightly larger recall rate, accuracy rate and F value, but as the number of recommended results increases, the recommended effects decrease. In general, the proposed method of the recommended algorithm has a good effect. The method proposed in this paper can improve the accuracy of recommendation and partially eliminate the cold start problem of users, which has certain enlightenment for the expansion of personalized recommendation algorithm and the improvement of e-commerce user management. [ABSTRACT FROM AUTHOR]

In this paper, a simple yet effective network pruning framework is proposed to simultaneously address the problems of pruning indicator, pruning ratio, and efficiency constraint. This paper argues that the pruning decision should depend on the convolutional weights, and thus proposes novel weight-dependent gates (W-Gates) to learn the information from filter weights and obtain binary gates to prune or keep the filters automatically. To prune the network under efficiency constraints, a switchable Efficiency Module is constructed to predict the hardware latency or FLOPs of candidate pruned networks. Combined with the proposed Efficiency Module, W-Gates can perform filter pruning in an efficiency-aware manner and achieve a compact network with a better accuracy-efficiency trade-off. We have demonstrated the effectiveness of the proposed method on ResNet34, ResNet50, and MobileNet V2, respectively achieving up to 1.33/1.28/1.1 higher Top-1 accuracy with lower hardware latency on ImageNet. Compared with state-of-the-art methods, W-Gates also achieves superior performance. [ABSTRACT FROM AUTHOR]

• We propose a density-aware and background-aware multi-task learning network for crowd counting. • A multi-task joint loss is proposed for our multi-task learning network. • Extensive experiments are conducted on three crowd counting benchmark datasets and promising results are achieved. In this paper, we propose a density-aware and background-aware network via multi-task learning (MTL-DB) for crowd counting. It aims to enable the model to capture the high-level semantic information of density and background via multi-task joint training, which may jointly optimize the generation of density maps. Initially, MTL-DB utilizes the first ten layers of VGG-16 with Batch Normalization as the front-end to extract primary features which will be shared by all tasks. Then, a multi-task back-end is constructed by integrating the main task of density map estimation with two auxiliary tasks, i.e., density classification and background segmentation. The density classification auxiliary task captures the density-related information with a fully connected classifier, while the background segmentation auxiliary task applies dilated convolutional network to distinguish the head area of pedestrians and background. With high-level semantic awareness, the main task generates estimated density maps utilizing normal convolutional layers. Furthermore, a multi-task joint loss is proposed to improve the quality of estimated density maps. Extensive experiments on three challenging crowd datasets (ShanghaiTech Part A & B, UCF_CC_50, and UCF_QNRF) verified the effectiveness of this multi-task learning model. MTL-DB outperformed other multi-task learning methods on the ShanghaiTech dataset, both Part A and Part B. [ABSTRACT FROM AUTHOR]