针对现有的基于知识图谱的推荐算法往往侧重于物品端邻居信息,而忽视用户端兴趣特征问题,提出一种融合图注意力和知识图卷积网络的双端邻居推荐算法。首先,在用户端,以用户的历史兴趣作为种子,在知识图中迭代传播偏好,融合图注意力形成...针对现有的基于知识图谱的推荐算法往往侧重于物品端邻居信息,而忽视用户端兴趣特征问题,提出一种融合图注意力和知识图卷积网络的双端邻居推荐算法。首先,在用户端,以用户的历史兴趣作为种子,在知识图中迭代传播偏好,融合图注意力形成用户潜在兴趣向量;其次,在物品端,结合图卷积网络在知识图遍历路径中聚合重要邻域信息,获得物品偏好聚合向量;同时在损失函数中融入标签平滑正则化项;最后使用内积运算得到用户对物品的喜好预测。通过在公开数据集下的实验结果表明,文章算法与其他基准算法相比,在CTR(Click Through Rate)和Top-K(对模型给出的前K个预测结果进行性能评估)推荐场景下的评估指标AUC(Area Under Curve)、F_(1)(F_(1)-score)、recall(召回率)均有所提高。文章该算法具有较好的推荐性能和可解释性。展开更多
随着线上线下融合的全渠道模式蓬勃发展,厂商相继退出线上购买线下退货的全渠道退货服务(Buy Online and Return in Store,BORS)。考虑了服务差异化与消费者异质双重影响下的全渠道退货的问题,构建同渠道退货和全渠道退货两种退货策略模...随着线上线下融合的全渠道模式蓬勃发展,厂商相继退出线上购买线下退货的全渠道退货服务(Buy Online and Return in Store,BORS)。考虑了服务差异化与消费者异质双重影响下的全渠道退货的问题,构建同渠道退货和全渠道退货两种退货策略模型,研究产品定价决策与退货策略选择,并分析服务与消费者差异性对供应链定价及退货策略的影响。研究表明,当服务水平达到一定阈值后,消费者会为全渠道退货服务承担一定溢价;供应链提供合理的差异化服务实施差异化竞争,能凸显全渠道退货优势,提升供应链利润。当服务成本低且消费者服务感知较高时,更适合采用全渠道退货策略。展开更多
A new synchronization technique of inner and outer couplings is proposed in this work to investigate the synchro- nization of network group. Some Haken-Lorenz lasers with chaos behaviors are taken as the nodes to cons...A new synchronization technique of inner and outer couplings is proposed in this work to investigate the synchro- nization of network group. Some Haken-Lorenz lasers with chaos behaviors are taken as the nodes to construct a few nearest neighbor complex networks and those sub-networks are also connected to form a network group. The effective node controllers are designed based on Lyapunov function and the complete synchronization among the sub-networks is realized perfectly under inner and outer couplings. The work is of potential applications in the cooperation output of lasers and the communication network.展开更多
文摘针对现有的基于知识图谱的推荐算法往往侧重于物品端邻居信息,而忽视用户端兴趣特征问题,提出一种融合图注意力和知识图卷积网络的双端邻居推荐算法。首先,在用户端,以用户的历史兴趣作为种子,在知识图中迭代传播偏好,融合图注意力形成用户潜在兴趣向量;其次,在物品端,结合图卷积网络在知识图遍历路径中聚合重要邻域信息,获得物品偏好聚合向量;同时在损失函数中融入标签平滑正则化项;最后使用内积运算得到用户对物品的喜好预测。通过在公开数据集下的实验结果表明,文章算法与其他基准算法相比,在CTR(Click Through Rate)和Top-K(对模型给出的前K个预测结果进行性能评估)推荐场景下的评估指标AUC(Area Under Curve)、F_(1)(F_(1)-score)、recall(召回率)均有所提高。文章该算法具有较好的推荐性能和可解释性。
文摘随着线上线下融合的全渠道模式蓬勃发展,厂商相继退出线上购买线下退货的全渠道退货服务(Buy Online and Return in Store,BORS)。考虑了服务差异化与消费者异质双重影响下的全渠道退货的问题,构建同渠道退货和全渠道退货两种退货策略模型,研究产品定价决策与退货策略选择,并分析服务与消费者差异性对供应链定价及退货策略的影响。研究表明,当服务水平达到一定阈值后,消费者会为全渠道退货服务承担一定溢价;供应链提供合理的差异化服务实施差异化竞争,能凸显全渠道退货优势,提升供应链利润。当服务成本低且消费者服务感知较高时,更适合采用全渠道退货策略。
基金Project supported by the National Natural Science Foundation of China(Grant No.11004092)the Natural Science Foundation of Liaoning Province,China(Grant Nos.2015020079 and 201602455)the Foundation of Education Department of Liaoning Province,China(Grant No.L201683665)
文摘A new synchronization technique of inner and outer couplings is proposed in this work to investigate the synchro- nization of network group. Some Haken-Lorenz lasers with chaos behaviors are taken as the nodes to construct a few nearest neighbor complex networks and those sub-networks are also connected to form a network group. The effective node controllers are designed based on Lyapunov function and the complete synchronization among the sub-networks is realized perfectly under inner and outer couplings. The work is of potential applications in the cooperation output of lasers and the communication network.
