According to the shortcomings of the traditional PDM security management, this paper establishes a workspace-based authorization management model and a DPDM network security model.
本文针对传统PD M安全管理的缺点，建立了基于工作空间的权限管理模型和网络安全模型。
Sequential images of the deformation field under a model footing were digitally recorded. The DPDM technique was used to achieve the incremental displacement field and the slip failure surface.
基础荷载作用下的地基变形场用连续的数码相片记录，然后用数字照相变形量测技术分析得到地基的增量变形场和地基的破坏面。
Sequential images of the deformation field under a model footing were digitally recorded. The DPDM technique was used to achieve the incremental displacement field and the slip failure surface.
基础荷载作用下的地基变形场用连续的数码相片记录，然后用数字照相变形量测技术分析得到地基的增量变形场和地基的破坏面。
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