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Cross-domain access control can improves interoperability but reduces intra-domain autonomy.To balance inter-domain interoperability and intra-domain autonomy,a cross-domain access control policy mapping to the problem of multi-objective integer optimization programming was formulated.Both the maximization of inter-domain interoperability and the minimization of intra-domain autonomy were taken as the objectives.Further,seven constraints were designed to prevent typical cross-domain conflicts.To solve the optimization problem,a constrained NSGA-III algorithm was proposed.The experimental results show that the proposed algorithm can quickly converge and accurately find the policy mapping even in the large-scale datasets. 相似文献
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本文研究了单点登录系统的设计与实现,利用一人一个唯一的账号、密码实现多个系统的登录认证。本文讨论了两种单点登录实现方式:一种为主站通过非对称加密算法的私钥生成凭证,分站认证登录;另一种方式为主站模拟用户登录行为,采用POST参数的方式登录分站。两种实现方式各有利弊,适合不同情况。该系统对用户使用感受、系统安全性有较好影响。 相似文献
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为了解决局部匹配算法误匹配率高的问题,提出 一种基于AD-Census变换和多扫描线优化的半全局匹配算 法。首先,通过绝对差AD算法与Census变换相结合作为相似性度量函数计算初始匹配代价, 并构建动态交叉域聚合 匹配代价;然后在代价聚合计算阶段,将一维动态规划的代价聚合推广到多扫描线优化,利 用上下左右四个方向逐 次扫描进行匹配代价聚合的计算,并引入正则化约束以确保匹配代价聚合的一致性,大大减 少初始代价中的匹配异 常点;最后,运用简单高效的胜者为王策略选出像素点在代价聚合最小时对应的视差,并在 视差细化阶段,采用左 右一致性检测和抛物线拟合方法进行后续处理以提高立体匹配的正确率。实验结果证明,该 算法可获得高匹配率的视差图并且耗时较少。 相似文献
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在中国儿童文学领域“重提”跨学科实践,旨在于文学发展的内源性和时代演进的外源性同构的基石上,从学科界分的角度重审其概念的本体意涵,探寻跨学科拓展的知识学依据。中国儿童文学不仅是一个描述性的概念,还是一个结构与关系的概念。这种概念与学科的特殊性内在地驱动了学科互涉的转向。总体而言,中国儿童文学的跨学科拓展路径包含了内部“贯通”与外部“联动”两个层级。在世界儿童文学与百年中国文学的整体格局中,将这种跨学科实践纳入系统论的视野,超越“纯文学本质主义”与“非文学工具主义”的理论偏狭,在坚守学科本位的同时有效地开启学科间的对话交流,促进学科知识的整合,进而推动百年中国儿童文学向纵深方向发展。 相似文献
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Aiming at the controlled sharing for cross-domain data exchange for complicated application systems,an extended access control mechanism was proposed.The control process was divided into two steps:constraint control and propagation control.The constraint control was used to ensure that access to data was authorized before access request,and the propagation control was used for further extension control after obtaining data access right.In addition,by considering data self and data provenance,the direct and indirect access control were realized.Theoretically,the security and effectiveness of the proposed mechanism were proved.Finally,taking the control of electronic invoice as an example,the implementation approach was proposed.The example shows that the proposed mechanism can perform the fine-grained extended control before and after data in the cross-domain and cross-system are exchanged. 相似文献
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传统的推荐算法受限于单领域中用户和项目的稀疏关系,也存在用户冷启动等问题.跨领域推荐能够通过学习辅助领域的知识去丰富目标领域的稀疏数据以提高推荐准确率.本文提出了一种知识聚合和迁移相结合的跨领域推荐算法ATCF.与已有算法不同,在对共性知识和个性知识的表示学习中,ATCF均充分融合了辅助域和目标域的知识,通过基于矩阵分解的两级矩阵拼接和两次矩阵填充,得到在群集矩阵及评分矩阵上的共性知识表示;通过知识迁移,构建了重叠用户和非重叠用户的个性知识表示,有效避免了负迁移.在两个跨领域数据集上开展的实验表明,ATCF算法与已有单领域和跨领域推荐算法相比RMSE降低了3%~7%,准确率召回率增加了8%~15%. 相似文献
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