Results 31 to 40 of about 1,957 (147)
Role-based abstract modeling of blockchain auction contracts and verification of temporal security and fairness [PDF]
To enhance the efficiency of time security verification and fairness verification of auction contracts, an abstract modeling and verification method for role-based auction contracts was proposed.
CHENG Zhuo +5 more
core +1 more source
《高压电器》“GIS/GIL用环氧复合绝缘件研究”专题征稿启事
Dianci bileiqi, 2017 SF6气体绝缘金属全封闭开关设备、管道母线等（GIS、GIL）广泛用于超、特高压输电系统和大中城市的配电系统中,已成为建设智能电网的首选设备。其中,环氧复合材料绝缘件（如环氧复合盆式或支柱绝缘子、绝缘拉杆等）是GIS/GIL等设备的重要组成部分,也是制约设备绝缘水平的核心部件,其性能决定了GIS/GIL等设备的经济性,也成为制约超特高压GIS/GIL等设备可靠性的关键部件 ...
doaj +6 more sources
An Improved Scheme for Blockchain Oracle Based on Schnorr Signature [PDF]
Blockchain oracle is a type of middleware that provides trustworthy guarantee for on-chain data, effectively addressing the trust problem of on- and off-chain data transmission.
Huaiyong CUI, Shaohua ZHANG, Chao LI, Bingrong DAI
core +1 more source
大数据, 2022 去中心化金融（DeFi）是一种基于区块链和智能合约提供金融服务的新范式，现已涉及包括借贷及其衍生品在内的众多领域。因此，作为DeFi基础的交易机制成为重要的关注点，其直接影响着上层应用的稳定性。主要讨论DeFi领域的交易机制，首先介绍与交易机制相关的概念和协议；然后通过实现方式对交易机制进行分类，分别详细讨论了基于交易委托账本、自动做市商和聚合器方法的交易机制实现，并比较归纳实现方案之间的区别与联系；最后分析并总结了去中心化交易面临的公平性、安全性、匿名性问题，提出了相关的未来研究方向。
邓钇敏, 司世景, 王健宗, 李泽远, 肖京
doaj +1 more source
Research on efficient and secure cross-domain data sharing of IoV under blockchain architecture [PDF]
, 2023 To solve the problems of data disclosure, uncontrolled data access, and inefficiency of cross-domain data sharing in the Internet of vehicles (IoV), an efficient and secure cross-domain data sharing scheme of IoV under blockchain architecture was ...
Tiancong CAO, Xuejiao LIU, Yingjie XIA
core +1 more source
物联网学报针对智能反射面（IRS, intelligent reflecting surface）辅助的多输入单输出（MISO, multiple input single-output）无线携能通信（SWIPT, simultaneous wireless information and power transfer）系统，考虑基站最大发射功率、IRS反射相移矩阵的单位膜约束和能量接收器的最小能量约束，以最大化信息传输速率为目标，联合优化了基站处的波束成形向量和智能反射面的反射波束成形向量。为解决非凸优化问题 ...
基于DDPG的智能反射面辅助无线携能通信系统性能优化
doaj +1 more source
大数据, 2023 针对当前公益慈善行业存在的善款流向不透明、不可追溯和捐赠信息易篡改等问题，构建了一种基于联盟区块链的公益善款溯源系统模型。共识过程中应用了一种改进的PBFT共识算法——DG-PBFT算法，将原有的主节点随机选举改进为积分制选举，并将原来的三阶段共识优化为两阶段。溯源系统依托Hyperledger Fabric平台进行开发，采用Go语言进行链码开发。配置4个组织，分别对应捐助者、受助者、慈善机构和监管部门。根据功能需求设计智能合约，不仅实现了善款信息的溯源，还能通过该溯源系统进行申诉与监督。实验结果表明 ...
高玮军, 王凯
doaj +1 more source
STBM: secure and trustworthy blockchain-based model for cybersecurity service transactions [PDF]
To overcome the numerous challenges faced by traditional models of cybersecurity service transactions, adapt to the needs of industrial digitalization, and address the inconveniences and opacity of cybersecurity service transactions, a secure and ...
PIAO Guirong, ZHU Jianming
core +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 1, Page 36-43, July 2024.ABSTRACT Objective Although remarkable strides have been made in fetal medicine and the prenatal diagnosis of congenital heart disease, around 60% of newborns with isolated coarctation of the aorta (CoA) are not identified prior to birth. The prenatal detection of CoA has been shown to have a notable impact on survival rates of affected infants.
C. A. Taksøe‐Vester +8 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2022 近年来，机器学习等人工智能技术被应用于蛋白质工程，其在蛋白质结构、功能预测、催化活性等研究中具有独特优势。在未知蛋白质结构的情况下，将蛋白质序列和功能特性与机器学习相结合，基于序列-活性关系（innovative sequence-activity relationship，ISAR）算法，将蛋白质氨基酸序列数字化，用快速傅里叶变换（fast four transform，FFT）进行预处理，再进行偏最小二乘回归建模，可在数据集较少情况下拟合得到最佳模型。通过机器学习对紫色球杆菌视紫红质 ...
JIALili(郏丽丽) +1 more
doaj +1 more source