以城市化促进城乡统筹发展的思路与对策——以河北为例

目前,我国城乡居民收入差距仍在扩大,城乡社会发展差距悬殊,其深刻根源在于城乡二元体制。没有城乡经济的统筹发展,就没有经济协调、可持续的发展。此文就河北近5年的城乡差距及城市化与城乡差距的相关关系做了实证分析,对河北省以城市化促进城乡发展提出了相应的思路与对策

WEAR SIMULATION FOR ARTIFICIAL HIP JOINT BASED ON EXPERIMENTAL MODEL

HA / Zr O2 composite coating was prepared with optimized spraying parameters. Wear rate model of the coating was built with pin-on-disc tester basing on uniform design theory and the quadratic polynomial stepwise regression analysis method. Computational wear modeling based on the finite element method and the wear rate model was developed for artificial hip joint and the effect of joint clearance was investigated. It was proved by the experimental data that the wear rate model had a good forecasting effect within a wide range. The results of the wear simulation of artificial hip joint demonstrated that with the increasing of wear cycle,the contact stress on the contact surface of the joint decreased,while the worn area increased gradually,and the wear volume increased linearly but the growth rate of wear depth changed from fast to slow. What’s more,with the increasing of joint clearance,the wear volume of the acetabular decreased,but the largest wear depth increased

Research and implementation of OPC UA Publish /Subscribe mode based on message broker

针对目前OPC UA客户端/服务器通信模式中存在的紧耦合、服务器性能瓶颈等问题,进行了OPC UA发布/订阅通信模式总体架构的研究。首先具体分析了UA的核心功能,包括地址空间技术和数据编码技术,并在两者的基础上,利用消息代理机制,完成了发布者和订阅者的功能开发。还通过实验进一步验证了功能的稳定性和对数据的传输能力,结果表明,此模式可以满足大多数工业需求。</p

CSRe与RIBLLⅡ实时数据交互系统

介绍了国家重大科学工程项目——兰州重离子加速器冷却存储环(HIRFL-CSR)的实验环(CSRe)以及RIBLLⅡ的子系统——实时数据交互系统。该系统主要实现对前端电源设备的实时同步控制,具体的实现方法是从控制Web界面输入的前端控制设备所需的数据信息传送至中心Oracle数据库,再更新至前端服务器的Oracle数据库,随后传送至ARM板中的sqlite数据库,给DSP板提供输入数据信息,通过同步触发事例对电源设备进行同步实时控制。该系统正在RIBLLⅡ的测试中,运行正常、可靠性强、性能稳定