针对信息化教学基础上全在线教学转为线下教学衔接策略进行研究,提出将课程划分课题,以理论带动实践逐层深入的衔接模式,进行理实融合,补足全在线教学的缺漏环节,突出理论知识在实际生活中的应用.实践教学中融入思政教育,提升学生的信息素养、职业道德素养,为培养德才兼备的人才提供一定的参考.

利用SEM,EDS,XRD,气孔率,抗压强度等测试手段,分析烧结温度(1250～1550℃)对耐火材料用钙铝石/富镁晶石复合材料性能的影响.结果表明:经过1450～1550℃温度下烧结得到的复合材料中形成了更强的富镁晶石与钙铝石的衍射峰,刚玉相已经完全消失,确定最佳烧结温度范围为1450～1550℃.在1250～1550℃温度范围内,对试样烧结后形成了平板形的钙铝石大块晶体;当烧结温度升高后,富镁晶石相的晶粒将会不断生长变大并形成清晰的八面体结构.随烧结温度的增加,复合材料气孔率表现出减小的变化规律,1450℃下对应的气孔率为40.28％,1550℃下对应的气孔率为33.68％.试样的抗压强度表现出随烧结温度升高而增大的趋势.

The numerical method of analyzing slope stability is well-developed in the recent years,particularly,when the strength reduction method is combined with finite element method,finite difference method and other numerical method,the numerical method could relate to traditional safety coefficient,and this is better for engine-ering design.The paper established FLAC3D three-dimensional solid model and inputed measured seismic wave,then simulated and analyzed response pattern of acceleration.The paper also established a method to calculate dynamical safety factor base on strength reduction method.

This paper describes the design and implementation of an on-line monitoring system widely used in the railway industry.The system can detect three-phase electrical power by collecting the current and the power of railway bifurcated switch throughout its startup and working period.This scheme adopts the multi-parameter energy collecting chip ATT7022 for data collection and processing,and uses the chip C8051F410 as its CPU.All modules can communicate by means of CAN bus.The linearity,response time,stability and performance test show that the device has many advantages,such as high-precision,low-energy consumption and high ability of anti-interference.

In view of the features of this course and students,this paper propounds a series of feasible methods as to how to improve the teaching efficiency and quality,meeting the needs of teaching objectives and students' work practice.

The new pit-retaining system composed of double-row piles and cement-soil gravity arch will make full use of of gravity effect,which transmits the relatively high earth pressure close to the bottom of pit down to deep soil through gravity arch,and the upper earth pressure to double-row piles,which have better lateral resisting stiffness,and further to deep soil.The compound pit-retaining system has the advantages of each single sub-system,and meets the requirements of water-cutting in case of hign ground water level.This paper intends to analyze the form of load effect transmission in the compound system by choosing a proper theoretical analysis model in accordance with its construction features,studies the working mechanism of this system and provide certain reference basis for engineering design,calculation and application of such compound pit-retaining system.