计算机联锁系统应用于枢纽工程的研究与实现

介绍了一种计算机联锁系统在枢纽工程中的实现方式;通过构建的双环冗余网,可以实现计算机场联信息的传递和处理;介绍了计算机联锁系统的组网结构,对场联通信接口的设计和实现方法进行了论述。     

Expert S-surface control for autonomous underwater vehicles

S-surface control has proven to be an effective means for motion control of underwater autonomous vehicles （AUV）. However there are still problems maintaining steady precision of course due to the constant need to adjust parameters, especially where there are disturbing currents. Thus an intelligent integral was introduced to improve precision. An expert S-surface control was developed to tune the parameters on-line, based on the expert system, it provides S-surface control according to practical experience and control knowledge. To prevent control output over-compensation, a fuzzy neural network was included to adjust the production rules to the knowledge base. Experiments were conducted on an AUV simulation platform, and the results show that the expert S-surface controller performs better than an S-surface controller in environments with currents, producing good steady precision of course in a robust way.     

冲击碾压技术在湿陷性黄土路基整治中的应用

以颗粒分析、电镜扫描、荷载试验和黄土湿陷试验为主要手段,对冲击碾压整治后黄土路基的压实效果进行分析,探讨了不同能级冲击碾压处理条件下,湿陷性路基黄土粒度的成分、微结构、承载力、湿陷性、压实度的变化规律与影响深度,对黄土地区路基的大面积机械化施工有重要的参考价值和指导意义。     

CompactPCI热插拔系统设计与应用

热插拔是CPCI系统最重要和最具优势的特点。目前,业界尚没有一种能够同时支持基本热插拔、完全热插拔和高可靠性热插拔的实现方案。提供了一种CPCI热插拔系统,分别从系统架构、软件架构、各组成部分的数据流交互、热插拔驱动以及守护进程的工作流程5个方面阐述了整个系统的硬件和软件实现。该热插拔系统符合CPCI热插拔规范,能够同时支持基本热插拔、完全热插拔和高可靠性热插拔。     

30m预应力简支箱梁受弯极限承载力仿真分析

由于现阶段的桥梁设计局限于运用线弹性理论,无法客观反映桥梁结构材料的非线性行为,而有限元理论可以很好地处理这类问题。现运用ANSYS有限元软件对一片30 m预应力简支箱梁进行极限承载力仿真分析,对预应力箱梁非线性行为进行了全过程跟踪分析,最终得出预应力箱梁极限承载力。     

Study on simulation modeling and evaluation of equipment maintenance

Aiming at the actual demand for the maintenance support of new general equipments, this paper analyzes the structure and circulation of maintenance support system, builds the simulation model of running process by entity flow chart method, and constructs the basic frame of the simulation model. The generating method of random variables and the advancing process of the simulation clock are described, and the accurate prediction of maintenance equipment is realized. Moreover, the material readiness rate is analyzed in statistics objective to evaluate the simulation result. The research is of significance for improving the efficiency of equipment maintenance and the promotion of material readiness rate.     

风积砂地区树根桩单桩承载力现场试验研究

研究了不同成桩材料及成桩过程对单桩承载力的影响。试验结果表明,先填石子后压力注浆所成的树根桩单桩承载力最高;风积砂地区,当桩长超过4．5m后,再增加桩长,并不能提高单桩承载力,而增大桩径是一种有效途径。     

进速比对喷水推进器进水流道性能影响研究

采用RNG k-ε湍流模型封闭RANS方程,运用SIMPLE算法,对某喷水推进器进水流道的内流场进行数值模拟,揭示了该流道特征断面的速压分布规律和水力损失规律,从流道出流均匀性、空化程度、流动分离程度和流动损失四个方面提供定性和定量指标来分析流道在不同进速比(IVR)工况下的水力性能.分析结果表明,该流道应尽量工作于IVR在0.6～0.8之间工况,此时各方面性能都较好.     

边坡抗滑桩优化设计

针对现在边坡抗滑桩设计方面的不足之处,提出了一种边坡抗滑桩优化设计方法:对边坡进行有限元分析,找出边坡位移最大位置;在位移最大位置处设置抗滑桩,进行边坡抗滑桩整体有限元分析;根据抗滑桩有限元计算结果进行配筋设计.对该设计理论进行了工程实例验证,结果显示,使用该方法能考虑土体的本构关系、力学概念明确,因而比传统配筋设计方法具有明显的优越性.     

浅谈民航大发展形势下的人力资源管理

民航大发展将影响民航专业人才的流动,作为培养民航专业人才的单位应正确处理人事危机,要加强单位人力资源的风险管理,同时应建立切合实际的单位人力资源开发体系。