An investigation of the rock magnetic properties using stepwise IRM acquisition, thermomagnetic analysis and remanent characteristics, identifies magnetite as the carrier of the main fraction of the remanence for the paleosoil unit S1 in the Dingbian, Weinan, Xifeng loess sections.
对黄土高原定边、西峰、渭南三个剖面中古土壤层S1的定向连续古地磁样品作了详细的岩石磁学和古地磁学研究，均未发现Blake极性事件。
Perimeter blasting technique,which can decrease the blasting vibration and harmfulness on fixed slope,is used in the Zhangbagou Limestone Mine.
张坝沟石灰石矿长期采用光面爆破技术来减小爆破震动及后冲对固定边坡的危害。
A new method based on adjoint system and minus system to compute unstable equilibrium points on the stability boundary of power system classical model is proposed.
提出一种基于伴随系统和变号系统的求解电力系统经典模型稳定边界上不稳定平衡点的方法。
Firstly, the Taylor series solution of a partial differential equation is used to approximate the stability boundary in the neighborhood of an unstable equilibrium point.
依据非线性系统理论,稳定边界由该稳定边界上的所有不稳定平衡点的稳定流形的并集构成。
The characteristic invariant manifolds are some special low-dimensional invariants on the stability boundary.
电力系统暂态稳定边界可信域的研究对确定近似边界的适用范围有十分重要的意义。
The results indicate that the seismic responses of pier under the viscous-spring boundary are less than that under the fixed boundary,and the seismic responses of pier on the site with the frozen layer are much less than that without the frozen layer.
结果表明Ⅱ类场地上的挖井基础桥墩,采用粘弹性边界时的桥墩地震反应比固定边界时的地震反应小;冻土时的地震反应比融土时的地震反应明显减小。
In numerical manifold method,fixed boundary is treated by penalty function method.
目前,数值流形方法一般采用罚函数方法处理固定边界问题,但罚弹簧的布置与大小对数值模拟的效果有一定的影响,且处理方式也比较复杂。
In addition in view of the factors of drainage and load of side slope are considered corresponding measures are proposed to stable side slope and ensure the safety of buildings.
工程中通过设置二阶石砌挡土墙和钢筋混凝土挡土墙稳定边坡,同时考虑了排水和坡体荷载等因素,采取相应措施确保边坡稳定,保证建筑物的安全。