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| 1 | 图论中树结构的稳定性优化设计方法研究显示文摘研究图论中树结构的优化设计方法,提高树结构的稳定性。由于算法的局限性,以及结构的复杂性影响,采用传统的方法进行树结构的优化设计,在实际的应用中,容易出现链路拥塞、节点失效的问题,稳定性不尽人意,无法满足实际的应用需求。为此,提出基于Dijkstra算法的树结构的稳定优化设计方法。依据Dijkstra理论,根据加权长度值的排序,得到最短路径,实现树结构的设计,引入应变能敏感度概念,计算获取最小值,并对树结构的节点位置进行优化调整,实现图论中树结构的稳定性优化。实验结果表明,采用改进算法进行图论中树结构的稳定性优化设计,能够提高设计结构的稳定性,简化算法运行过程,节约耗时,能够满足实际的设计需求,具有广泛的应用价值。 | 林越 | 2016 | 科技通报2016，32，2： | 0 |
| 2 | Comparison of shallow tunneling method with pile and rib method for construction of subway station in soft ground显示文摘In the present study,a comparison between the new shallow tunneling method(STM)and the traditional pile and rib method(PRM)was conducted to excavate and construct subway stations in the geological conditions of Tehran.First,by selecting Station Z6 located in the Tehran Subway Line 6 as a case study,the construction process was analyzed by PRM.The maximum ground settlement of 29.84 mm obtained from this method was related to the station axis,and it was within the allowable settlement limit of 30 mm.The acceptable agreement between the results of numerical modeling and instrumentation data indicated the confirmation and accuracy of the excavation and construction process of Station Z6 by PRM.In the next stage,based on the numerical model validated by instrumentation data,the value of the ground surface settlement was investigated during the station excavation and construction by STM.The results obtained from STM showed a significant reduction in the ground surface settlement compared to PRM.The maximum settlement obtained from STM was 6.09 mm as related to the front of the excavation face.Also,the sensitivity analysis results denoted that in addition to controlling the surface settlement by STM,it is possible to optimize some critical geometric parameters of the support system during the station excavation and construction. | Sina AMIRI Ali Naghi DEHGHAN | 2022 | Frontiers of Structural and Civil Engineering2022，16，6： | 0 |
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