公路水泥稳定级配碎石基层施工质量控制

介绍路面基层水泥稳定级配碎石的施工、配合比设计、拌和、运输、碾压和施工质量控制。     

The transfer of the quantum correlation from two-mode nonclassical state field to the supercurrents in two distant SQUID rings

We have considered two distant mesoscopic superconducting quantum interference device (SQUID) rings A and B in the presence of two-mode nonclassical state fields and investigated the correlation of the supercurrents in the two rings using the normalized correlation function $C_{\rm AB}$. We show that when the parameter $\alpha$ is very small for the separable state with the density matrix $\hat {\rho } = (\left| {\alpha , - \alpha } \right\rangle \left\langle {\alpha , - \alpha } \right| + \left| { - \alpha ,\alpha } \right\rangle \left\langle { - \alpha ,\alpha } \right|) / 2$ and entangled coherent state (ECS) $\left| u \right\rangle = N_1 (\left| {\alpha , - \alpha } \right\rangle + \left| { - \alpha ,\alpha } \right\rangle )$ fields, the dynamic behaviours of the normalized correlation function $C_{\rm AB}$ are similar, but it is quite different for the entangled coherent state $\left| {u}' \right\rangle = N_2 (\left| {\alpha , - \alpha } \right\rangle - \left| { - \alpha ,\alpha } \right\rangle )$ field. When the parameter $\alpha $ is very large, the dynamic behaviours of $C_{\rm AB}$ are almost the same for the separable state, entangled coherent state $\left| u \right\rangle $ and $\left| {u}' \right\rangle $ fields. For the two-mode squeezed vacuum state field the maximum of $C_{\rm AB}$ increases monotonically with the squeezing parameter $r$, and as $r \to \infty $, $C_{\rm AB} \to 1$. This means that the supercurrents in the two rings A and B are quantum mechanically correlated perfectly. It is concluded that not all the quantum correlations in the two-mode nonclassical state field can be transferred to the supercurrents; and the transfer depends on the state of the two-mode nonclassical state field prepared.     

株洲:形成"隐患清零"的磅礴力量

正一年来未发生较大以上安全生产责任事故,无水上交通、工程施工、地方铁路专用线生产安全事故,无涉稳涉暴问题……2019年,在株洲市委、市政府和省交通运输厅的正确领导下,株洲市交通运输局坚持问题导向,纵深推进安全"隐患清零"工作,全系统安全基础有了明显提升,交通运输安全形势持续稳定向好,为建设幸福株洲和"一谷三区"提供了坚强保障。     

聚乙二醇——三氯化钕配位聚合物的合成和表征

以聚乙二醇(PEG)为配位体,首次合成了三价稀土金属钕的配位聚合物。实验测定了该配位聚合物的红外光谱。     

株洲市:猛药去疴"雷霆行动"治超限超载顽疾

正全省交通问题顽瘴痼疾集中整治行动开展以来,株洲市交通运输行业认真贯彻严格落实,大力开展整治行动。近日,针对广大人民群众反映的东城大道超限超载严重问题,在市治超办的统一调度下,株洲市交通运输局协调醴陵市、芦淞区及公安特警、交警等部门在东城大道沿线开展联合治超行动,当场查获超限超载货车41台,依法拘留了19名强行闯关的货车驾驶员,有力遏制了货运车辆超限超载蔓延趋势。     

沥青路面养护工作中存在的主要问题及对策

简述了沥青路面养护工作的内容和技术要求,从我国公路沥青路面养护中存在的问题出发,对沥青路面养护中的各种病害进行分类和原因分析,并提出了相应的养护对策,以减少各类病害的发生,延长路面的使用寿命。     

现代膜技术及其在水处理应用中的研究进展

膜技术是一种新型、高效的水处理技术,近年来在工程中得到了广泛的应用。本文叙述了现代膜技术及其在给水、废水和污水处理中的研究进展,并介绍了膜污染、膜的改性。最后,对膜技术的应用进行了展望。