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分段γ扫描标样的非破坏性分析法检验 被引量:3
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作者 何丽霞 吕峰 +3 位作者 赵学军 隋洪志 刘亨军 李泽 《原子能科学技术》 EI CAS CSCD 北大核心 2007年第2期248-251,共4页
利用非破坏性分析法检验用于刻度分段γ扫描(SGS)装置的标样。采用分段γ扫描技术测量了8个装有U3O8的铀标样、8个装有PuO2的钚标样。检测铀标样和钚标样装钚量的准确性以及铀标样中U3O8和钚标样中PuO2与介质混合的均匀性。检测结果表明... 利用非破坏性分析法检验用于刻度分段γ扫描(SGS)装置的标样。采用分段γ扫描技术测量了8个装有U3O8的铀标样、8个装有PuO2的钚标样。检测铀标样和钚标样装钚量的准确性以及铀标样中U3O8和钚标样中PuO2与介质混合的均匀性。检测结果表明:SGS标样的装料量的准确性好于1%,标样中料样和介质混合的均匀性好于3%。 展开更多
关键词 非破坏性分析法 分段γ扫描技术 刻度标样
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Modeling of Water Vapor Condensation by Using Computer Methodology
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作者 Jan Skramlik Miloslav Novotny Karel Suhajda 《Journal of Civil Engineering and Architecture》 2013年第6期704-711,共8页
The excessive moisture has an adverse effect on the building materials structure. Most standard construction materials are characterized by porous structure, resulting in the ability to absorb water in liquid and gase... The excessive moisture has an adverse effect on the building materials structure. Most standard construction materials are characterized by porous structure, resulting in the ability to absorb water in liquid and gaseous phases in the inner pores. Under certain conditions, water fills the pores within the structure of building material and then moves back to its surrounding. Many technical studies have shown that monitoring the moisture transport is mainly based on experimental methods. This work is based on models of transport of moisture in building physics, i.e., the description of the moisture behaviour of building materials based on physical laws models (KRISCHER, KIESSL). The aim of this work is to obtain the parameters of distribution of moisture for calculation capillary conductivity coefficient for practical using by means of non-destructive method. The authors have now developed all the software required to perform a boundary element analysis of problems in potential flow. The examples which the authors can analyse will, however, be restricted to homogenous domains. 展开更多
关键词 Capillary conductivity coefficient moisture transfer EMWR (electromagnetic microwave radiation) diffusion.
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