直流电动机起动电阻的确定

直流电机起动过程中既要有足够的转矩,又要保证起动时间短,并且起动电流在允许范围内。本文根据直流电动机起动过程中的起动方程式得到的转速特性曲线,运用特性曲线研究直流电动机在满足以上要求的情况下,计算限制电枢回路起动电流的串接电阻（起动电阻）的数值方法。     

提高喷泉水流动态模拟效果的改进方法

For the purpose of improving the dynamic simulation effect of the particle system, this paper focuses on studying the dynamic simulation of the fountain flow based on particle system theory. A fountain particle motion model is constructed by applying the physical dynamic principle. The bead particle is structured by using OpenGL “short line” as the basic particle voxel, which performs better in real-time processing compared with other bead particles, such as sphere, cube and square. To avoid the invisibility of partial particles in 3D scene, the technique of the “△” line combination unit is adopted to implement the dynamic simulation of water beads. In order to agglutinate lots of particles to form water beads with different sizes and show the intermittent cylinder shape of the fountain, the fake particle viscosimetry and the blend operation in OpenGL are also adopted, making the fountain flow more realistic. Experiment indicates that the proposed method can effectively improve the reality and real-time performance of the fountain flow.     

高速公路路基施工技术与质量控制研究

由于我国经济的不断提高,让高速公路的建设量越来越大,因此其质量问题变成为了人们关注的焦点。而其中对于路基的建设是决定高速公路整体质量的关键性因素,因此相关工作人员一定要予以重视。那么下面我们就来具体的讨论一下有关高速公路路基施工技术以及质量控制的相关话题。