Applying new approaches, methods, and technologies for the estimation of reserves can effectively improve the efficiency and accuracy of assessments of solid mineral resources. After analyzing the development of 3-D g...Applying new approaches, methods, and technologies for the estimation of reserves can effectively improve the efficiency and accuracy of assessments of solid mineral resources. After analyzing the development of 3-D geoscience modeling technology （3-D GMT）, this paper discusses the application of 3-D GMT for the estimation of solid mineral reserves, emphatically introducing its workflow and two key technologies, 3-D orebody surface modeling, and property modeling. Moreover, the paper analyzes the limitations of traditional methods, such as the section method and geological block method, and points out the advantages of 3-D GMT： building more accurate 3-D orebody models, expressing the internal inhomogeneous attributes of an orebody, reducing the potential for errors in the estimation of reserves, and implementing dynamic estimations of reserves.展开更多
With the rapid development of Internet of Things(IoT)technology,smart home users can access and control smart devices remotely to enjoy convenient and efficient services.However,sensitive data collected by smart devic...With the rapid development of Internet of Things(IoT)technology,smart home users can access and control smart devices remotely to enjoy convenient and efficient services.However,sensitive data collected by smart devices is vulnerable to attacks such as eavesdropping and simulation when transmitted through public channels.At the same time,the security of resource-constrained smart devices is low,and attackers may use the controlled devices to carry out malicious operations further.To address the aforementioned existing security issues,this paper proposes a lightweight user anonymous authentication scheme for resource-constrained smart home environments.At the same time,the security analysis is carried out to further prove the proposed scheme's security.Finally,the performance analysis between the proposed scheme and the existing similar schemes proves that the proposed scheme has advantages in calculation cost and safety characteristics.展开更多
文摘Applying new approaches, methods, and technologies for the estimation of reserves can effectively improve the efficiency and accuracy of assessments of solid mineral resources. After analyzing the development of 3-D geoscience modeling technology （3-D GMT）, this paper discusses the application of 3-D GMT for the estimation of solid mineral reserves, emphatically introducing its workflow and two key technologies, 3-D orebody surface modeling, and property modeling. Moreover, the paper analyzes the limitations of traditional methods, such as the section method and geological block method, and points out the advantages of 3-D GMT： building more accurate 3-D orebody models, expressing the internal inhomogeneous attributes of an orebody, reducing the potential for errors in the estimation of reserves, and implementing dynamic estimations of reserves.
基金Supported by Research Project of Undergraduate Teaching Reform and Quality Construction in Tianjin Colleges and Universities in 2023(B231005806)。
文摘With the rapid development of Internet of Things(IoT)technology,smart home users can access and control smart devices remotely to enjoy convenient and efficient services.However,sensitive data collected by smart devices is vulnerable to attacks such as eavesdropping and simulation when transmitted through public channels.At the same time,the security of resource-constrained smart devices is low,and attackers may use the controlled devices to carry out malicious operations further.To address the aforementioned existing security issues,this paper proposes a lightweight user anonymous authentication scheme for resource-constrained smart home environments.At the same time,the security analysis is carried out to further prove the proposed scheme's security.Finally,the performance analysis between the proposed scheme and the existing similar schemes proves that the proposed scheme has advantages in calculation cost and safety characteristics.
