模糊控制在沥青混凝土搅拌设备料温控制中的应用

介绍沥青搅拌设备料温模糊控制系统的基本组成和初步的设计分析,给出控制器中4个主要工作参数的选取原则。     

福建产沥青混合料搅拌设备

对福建省公路部门生产的沥青混合料搅拌设备的矿料烘干筒,从结构形式、沥青混合料生产工艺流程及其对成品料质量的影响方面与传统的沥青混合料搅拌设备进行了对比分析.认为福建产沥青混合料搅拌设备是适应中国国情、具有较高性能价格比的设备.     

高速公路路面平整度施工控制

通过自己多年的路面施工实践经验,详细阐述了高速公路各结构层在施工过程中平整度好坏的影响因素,并针对出现的问题提出了自己的一些处理措施。     

如何防治沥青路面施工中的离析

通过对辽宁省高速公路路面中修工程施工过程中经常遇见的混合料离析现象进行总结,提出科学的解决方法以供大家借鉴。     

大型沥青拌和站的组建、安装、及调试

针对高等级公路建设中大型沥青混凝土拌和站的组建安装技术，具体从大型拌和设备的选型及其辅助设备的选型配套，到沥青站的安装与调试工作，直至其验收条件均进行了较为详细的叙述。     

进口沥青拌和机除尘器的改进

对原进口沥青拌和机的除尘器存在的问题进行了分析，提出了相应的改进措施，给出了该机改进前及改进后的工艺流程及除尘器示意图。提出设计中必须注意的几个问题。通过改进后的实际使用，证实了该除尘器装置确实能达到良好的除尘效果。     

拌和站管控一体化系统及应用

介绍了<拌和站管控一体化系统>的构成、功能和特点,对推广、应用存在的问题进行了分析,并提出了解决的建议.     

提速道岔1DQJ电路混线实例分析及改进

对提速道岔1DQJ电路中存在的问题进行分析，并提出相应的改进建议。     

Turbulence in coastal fronts near the mouths of Block Island and Long Island Sounds

Measurements of turbulence were performed in four frontal locations near the mouths of Block Island Sound (BIS) and Long Island Sound (LIS). These measurements extend from the offshore front associated with BIS and Mid-Atlantic Bight Shelf water, to the onshore fronts near the Montauk Point (MK) headland, and the Connecticut River plume front. The latter feature is closely associated with the major fresh water input to LIS. Turbulent kinetic energy (TKE) dissipation rate, ε, was obtained using shear probes mounted on an autonomous underwater vehicle. Offshore, the BIS estuarine outflow front showed, during spring season and ebb tide, maximum TKE dissipation rate, ε, estimates of order 10^− 5 W/kg, with background values of order 10^− 6 to 10^− 9 W/kg. Edwards et al. [Edwards, C.A., Fake, T.A., and Bogden, P.S., 2004a. Spring–summer frontogenesis at the mouth of Block Island Sound: 1. A numerical investigation into tidal and buoyancy-forced motion. Journal of Geophysical Research 109 (C12021), doi:10.1029/2003JC002132.] model this front as the boundary of a tidally driven, baroclinically adjusted BIS flow around the MK headland eddy. At the entrance to BIS, near MK, two additional fronts are observed, one of which was over sand waves. For the headland site front east of MK, without sand waves, during ebb tide, ε estimates of 10^− 5 to 10^− 6 W/kg were observed. The model shows that this front is at the northern end of an anti-cyclonic headland eddy, and within a region of strong tidal mixing. For the headland site front further northeast over sand waves, maximum ε estimates were of order 10^− 4 W/kg within a background of order 10^− 7–10^− 6 W/kg. From the model, this front is at the northeastern edge of the anti-cyclonic headland eddy and within the tidal mixing zone. For the Connecticut River plume front, a surface trapped plume, during ebb tide, maximum ε estimates of 10^− 5 W/kg were obtained, within a background of 10^− 6 to 10^− 8 W/kg. Of all four fronts, the river plume front has the largest finescale mean-square shear, S² ~ 0.15 s^− 2. All of the frontal locations had local values of the buoyancy Reynolds number indicating strong isotropic turbulence at the dissipation scales. Local values of the Froude number indicated shear instability in all of the fronts.     

钉形桩在市政道路工程中的应用

水泥土深层搅拌桩是用于加固饱和软粘土地基的一种较新的地基处理方法,具有施工简便、工期短、振动小等优点,在软土地基处理工程中得到广泛应用。文章介绍了钉形水泥土双向搅拌桩的优点与施工流程,并对其在武汉四新地区软土地基处理中的应用进行了试验研究。