Although boundary displacement and traction are independent field variables in boundary conditions of an elasticity problem at a non-singular boundary point, there exist definite relations of singularity intensities b...Although boundary displacement and traction are independent field variables in boundary conditions of an elasticity problem at a non-singular boundary point, there exist definite relations of singularity intensities between boundary displacement derivatives and tractions at a singular boundary point. The analytical forms of the relations at a singular smooth point for 2D isotropic elastic problems have been established in this work. By using the relations, positions of the singular boundary points and the corresponding singularity intensities of the unknown boundary field variables can be determined a priori. Therefore, more appropriate shape functions of the unknown boundary field variables in singular elements can be constructed. A numerical example shows that the accuracy of the BEM analysis using the developed theory is greatly increased.展开更多
以便解决动态重建和三维的地质的固体的本地更新问题，推理的拓扑学被用于三维的地质的建模。这能在实现 3D 推进相应的节自动化的水平由构造的地质的稳固的动态重建并且在 3D 上在拓扑学上推理弯了表面。这个方法成功地在南京城市里被...以便解决动态重建和三维的地质的固体的本地更新问题，推理的拓扑学被用于三维的地质的建模。这能在实现 3D 推进相应的节自动化的水平由构造的地质的稳固的动态重建并且在 3D 上在拓扑学上推理弯了表面。这个方法成功地在南京城市里被使用了地质的建模和当模特儿的 Zijin 金矿。结果证明这个方法适应共面的节和非共面的节数据，并且改进 3D 的效率地质的建模。展开更多
Considering the instability of data transferred existing in high speed network, a new method is proposed for improving the stability using control theory. Under this method, the mathematical model of such a network is...Considering the instability of data transferred existing in high speed network, a new method is proposed for improving the stability using control theory. Under this method, the mathematical model of such a network is established. Stability condition is derived from the mathematical model. Several simulation experiments are performed. The results show that the method can increase the stability of data transferred in terms of the congestion window, queue size, and sending rate of the source.展开更多
文摘Although boundary displacement and traction are independent field variables in boundary conditions of an elasticity problem at a non-singular boundary point, there exist definite relations of singularity intensities between boundary displacement derivatives and tractions at a singular boundary point. The analytical forms of the relations at a singular smooth point for 2D isotropic elastic problems have been established in this work. By using the relations, positions of the singular boundary points and the corresponding singularity intensities of the unknown boundary field variables can be determined a priori. Therefore, more appropriate shape functions of the unknown boundary field variables in singular elements can be constructed. A numerical example shows that the accuracy of the BEM analysis using the developed theory is greatly increased.
基金the Research Foundation for Outstanding Young Teachers, China University of Geosciences.
文摘以便解决动态重建和三维的地质的固体的本地更新问题，推理的拓扑学被用于三维的地质的建模。这能在实现 3D 推进相应的节自动化的水平由构造的地质的稳固的动态重建并且在 3D 上在拓扑学上推理弯了表面。这个方法成功地在南京城市里被使用了地质的建模和当模特儿的 Zijin 金矿。结果证明这个方法适应共面的节和非共面的节数据，并且改进 3D 的效率地质的建模。
基金the National Natural Science Foundation of China (50579022 50539140).
文摘Considering the instability of data transferred existing in high speed network, a new method is proposed for improving the stability using control theory. Under this method, the mathematical model of such a network is established. Stability condition is derived from the mathematical model. Several simulation experiments are performed. The results show that the method can increase the stability of data transferred in terms of the congestion window, queue size, and sending rate of the source.
