To improve the performance of the supply chain with one supplier and multiple retailers under deterministic price-sensitive customer demand, an optimal strategy is proposed based on knowledge discovery. First the dece...To improve the performance of the supply chain with one supplier and multiple retailers under deterministic price-sensitive customer demand, an optimal strategy is proposed based on knowledge discovery. First the decentralized system in which the supplier and the retailers are independent, profit-maximizing participants with the supplier acting as a Stackelberg game leader is studied. Numerical examples illustrate the importance of the coordination. The conventional quantity discount mechanism needs to be modified to coordinate the supply chain, so a revenue-sharing contract is proposed to coordinate such supply chain. Lastly, a special decision under certain demand rates is studied. The pricing and replenishment policies can be decided sequentially, which yields much less loss comparing with optimal decision when the demand rates are sufficiently large.展开更多
针对现有用户协作算法存在共谋攻击、背景知识攻击以及用户协作意愿等问题,基于可验证秘密共享与智能合约提出了一种用户协作隐私保护算法(privacy protection algorithm based on verifiable secret sharing and smart contracts,VSS-S...针对现有用户协作算法存在共谋攻击、背景知识攻击以及用户协作意愿等问题,基于可验证秘密共享与智能合约提出了一种用户协作隐私保护算法(privacy protection algorithm based on verifiable secret sharing and smart contracts,VSS-SCPPA)。该算法首先利用可验证秘密共享算法对用户查询信息进行加密和分裂,并提供系数承诺以验证子秘密数据的完整性。其次,结合智能合约与差分隐私技术设计了一种用户选择算法,构建匿名集。对该算法在抵御串通攻击方面的有效性进行了分析。通过在Geolife与BerlinMOD数据集上的实验,结果显示VSS-SCPPA的隐私保护性更高。与Tr-privacy、Ik-anonymity和GCS相比,VSS-SCPPA的效率分别提高了约86.34%、99.27%和99.19%。VSS-SCPPA在提高隐私保护性的同时显著提升了算法效率,证明了其在用户协作隐私保护中的有效性。展开更多
基金the National Natural Science Foundation of China (70471034)the Talent Foundation of Nanjing University of Aeronautics and Astronautics (s0670-082).
文摘To improve the performance of the supply chain with one supplier and multiple retailers under deterministic price-sensitive customer demand, an optimal strategy is proposed based on knowledge discovery. First the decentralized system in which the supplier and the retailers are independent, profit-maximizing participants with the supplier acting as a Stackelberg game leader is studied. Numerical examples illustrate the importance of the coordination. The conventional quantity discount mechanism needs to be modified to coordinate the supply chain, so a revenue-sharing contract is proposed to coordinate such supply chain. Lastly, a special decision under certain demand rates is studied. The pricing and replenishment policies can be decided sequentially, which yields much less loss comparing with optimal decision when the demand rates are sufficiently large.
文摘针对现有用户协作算法存在共谋攻击、背景知识攻击以及用户协作意愿等问题,基于可验证秘密共享与智能合约提出了一种用户协作隐私保护算法(privacy protection algorithm based on verifiable secret sharing and smart contracts,VSS-SCPPA)。该算法首先利用可验证秘密共享算法对用户查询信息进行加密和分裂,并提供系数承诺以验证子秘密数据的完整性。其次,结合智能合约与差分隐私技术设计了一种用户选择算法,构建匿名集。对该算法在抵御串通攻击方面的有效性进行了分析。通过在Geolife与BerlinMOD数据集上的实验,结果显示VSS-SCPPA的隐私保护性更高。与Tr-privacy、Ik-anonymity和GCS相比,VSS-SCPPA的效率分别提高了约86.34%、99.27%和99.19%。VSS-SCPPA在提高隐私保护性的同时显著提升了算法效率,证明了其在用户协作隐私保护中的有效性。
