以沥青混合料试件为研究对象,探讨了原子力显微样本的制备方法.选取最大纵向起伏度和表面粗糙度两个指标对不同储存条件下的样本制备效果进行评定,提出采用低温冷冻措施保证AFM(atomic force microscope)样本平整度的制样方法;利用原子...以沥青混合料试件为研究对象,探讨了原子力显微样本的制备方法.选取最大纵向起伏度和表面粗糙度两个指标对不同储存条件下的样本制备效果进行评定,提出采用低温冷冻措施保证AFM(atomic force microscope)样本平整度的制样方法;利用原子力显微技术的力学性能量化模块AFMQNM(atomic force microscope-quantitative nano mechanical),选取沥青胶浆区域3个典型的观测区域,进行原子力显微测试及微尺度力学性能量化表征.研究结果表明,"冷冻保存、低温切割"的混合料试件样本制备方法能够满足AFM技术的观测要求;AFM-QNM技术可以在混合料试件中直接测试沥青(胶浆)和矿质集料的模量和黏附性质,可有效区分不同的材料组分.展开更多
In the southeast part of the North-Asian craton, several ring basite-uhrabasite plutons have been rec- ognized, with which the commercial placers of platinoids associate. Analysis of the known geodynamic models of the...In the southeast part of the North-Asian craton, several ring basite-uhrabasite plutons have been rec- ognized, with which the commercial placers of platinoids associate. Analysis of the known geodynamic models of the region formation and materials of seismic tomography showed that the subduction processes, that actively manifested themselves in the Asia-Pacific convergence zone in Mesozoic, were responsible for initiation of the stagnated oceanic slab. Its NE and SW boundaries appear to coincide with the transform faults. Projection of the transform fault, bordering the above mentioned slab in the NEN, coincides with the Konder-Feklistovsky metal- logenic belt distinguished earlier and its Aldan （Inaglinsky） member. Higher platinum content of ring massifs of the belt is controlled by the influence of the lower mantle derivatives on the ascending upper mantle plumes.展开更多
Numerical simulation on conjugate heat transfer of an internal cooled turbine vane was carried out. Numerical techniques employed included the third-order accuracy TVD scheme, multi-block structured grids and the tech...Numerical simulation on conjugate heat transfer of an internal cooled turbine vane was carried out. Numerical techniques employed included the third-order accuracy TVD scheme, multi-block structured grids and the technique of arbitrary curved mesh. Comparison between results of commercial CFD codes with several turbulence models and those of this code shows that it is incorrect of commercial CFD codes to predict the thermal boundary layer with traditional turbulence models, and that turbulence models considering transition lead to more accurate heat transfer in thermal boundary layer with some reliability and deficiency yet. The results of this code are close to those of CFX with transition model.展开更多
In this paper, the teaching of course Three-dimensional Animation Foundation is designed mainly based on teaching content modularization and scaffolding teaching model. The modularized content design for Three-dimensi...In this paper, the teaching of course Three-dimensional Animation Foundation is designed mainly based on teaching content modularization and scaffolding teaching model. The modularized content design for Three-dimensional Animation Foundation is specifically expounded, and also the ideas for developing the scaffolding teaching model are analyzed. How to integrate the scaffolding teaching model into course teaching is introduced in details. Finally, new methods for guiding students to think independently in course teaching and improve students＇ self-awareness and self-learning ability are proposed.展开更多
文摘以沥青混合料试件为研究对象,探讨了原子力显微样本的制备方法.选取最大纵向起伏度和表面粗糙度两个指标对不同储存条件下的样本制备效果进行评定,提出采用低温冷冻措施保证AFM(atomic force microscope)样本平整度的制样方法;利用原子力显微技术的力学性能量化模块AFMQNM(atomic force microscope-quantitative nano mechanical),选取沥青胶浆区域3个典型的观测区域,进行原子力显微测试及微尺度力学性能量化表征.研究结果表明,"冷冻保存、低温切割"的混合料试件样本制备方法能够满足AFM技术的观测要求;AFM-QNM技术可以在混合料试件中直接测试沥青(胶浆)和矿质集料的模量和黏附性质,可有效区分不同的材料组分.
文摘In the southeast part of the North-Asian craton, several ring basite-uhrabasite plutons have been rec- ognized, with which the commercial placers of platinoids associate. Analysis of the known geodynamic models of the region formation and materials of seismic tomography showed that the subduction processes, that actively manifested themselves in the Asia-Pacific convergence zone in Mesozoic, were responsible for initiation of the stagnated oceanic slab. Its NE and SW boundaries appear to coincide with the transform faults. Projection of the transform fault, bordering the above mentioned slab in the NEN, coincides with the Konder-Feklistovsky metal- logenic belt distinguished earlier and its Aldan （Inaglinsky） member. Higher platinum content of ring massifs of the belt is controlled by the influence of the lower mantle derivatives on the ascending upper mantle plumes.
基金Sponsored by the National Natural Science Foundation of China (Grant No.5047028 and 50476017)
文摘Numerical simulation on conjugate heat transfer of an internal cooled turbine vane was carried out. Numerical techniques employed included the third-order accuracy TVD scheme, multi-block structured grids and the technique of arbitrary curved mesh. Comparison between results of commercial CFD codes with several turbulence models and those of this code shows that it is incorrect of commercial CFD codes to predict the thermal boundary layer with traditional turbulence models, and that turbulence models considering transition lead to more accurate heat transfer in thermal boundary layer with some reliability and deficiency yet. The results of this code are close to those of CFX with transition model.
文摘In this paper, the teaching of course Three-dimensional Animation Foundation is designed mainly based on teaching content modularization and scaffolding teaching model. The modularized content design for Three-dimensional Animation Foundation is specifically expounded, and also the ideas for developing the scaffolding teaching model are analyzed. How to integrate the scaffolding teaching model into course teaching is introduced in details. Finally, new methods for guiding students to think independently in course teaching and improve students＇ self-awareness and self-learning ability are proposed.
