施工企业工程造价控制

主要从成本费用预测和成本费用控制两方面着手，对施工企业工程造价的控制进行论述。成本费用预测常用的方法为定性预测和定量预测。通过利用原有资料和依靠专业人员的经验，对成本费用进行定性预测；利用数学模型，对成本费用进行定量预测。成本费用控制常用的方法为PDCA管理循环法、价值工程法。此文通过工程实例，采用价值工程法，论述成本费用的控制。     

浅议频率法测定斜拉桥的索力

该文介绍了频率法测量斜拉桥索力的测试原理,结合实例,给出某斜拉桥的部分测量结果,并就如何进一步提高索力测量精度进行了探讨。测量表明,用频率法测定索力,结果可靠,简便实用。     

基于ANSYS的瞬变电磁法数值模拟

在隧道中进行瞬变电磁法探测时,二次感应场还受到掌子面后方围岩的影响,使得隧道全空间瞬变电磁场正、反演比大地半空间更困难。论文利用有限元分析软件ANSYS对在隧道中进行瞬变电磁超前地质预报时瞬变电磁场进行了数值模拟计算,并将计算结果与物理模拟结果进行比较,表明了利用该法在隧道中进行瞬变电磁超前地质预报正演计算的可行性。     

Multi-try counter-meshing gears discrimination device based on MEMS technology

A multi-try counter-meshing gears (CMG) discrimination device based on micro electromechani-cal system (MEMS) technology was designed for some specified information fields. The discrimination deviceconsists of two groups of metal CMG, two pawl/ratchet mechanisms, two driving micromotors and two re-setting micromotors, which make the CMG withdraw by raising the pawls. The energy-coupling element isa photoelectric sensor with a circular plate which is notched. Micromotor is fabricated using the ultravioletLiGA (UV-LiGA) fabrication process and precision mechanical engineering. The discrimination device has thefunction which can automatically reset, with the correct resetting code, it can be tried another times.     

Reliability analysis of repairable systems using stochastic point processes

In order to analyze the failure data from repairable systems, the homogeneous Poisson process(HPP) is usually used. In general, HPP cannot be applied to analyze the entire life cycle of a complex, re-pairable system because the rate of occurrence of failures (ROCOF) of the system changes over time rather thanremains stable. However, from a practical point of view, it is always preferred to apply the simplest methodto address problems and to obtain useful practical results. Therefore, we attempted to use the HPP model toanalyze the failure data from real repairable systems. A graphic method and the Laplace test were also usedin the analysis. Results of numerical applications show that the HPP model may be a useful tool for the entirelife cycle of repairable systems.     

架空刚性悬挂弓网磨耗异常的分析与解决办法

分析架空刚性接触悬挂在运营中出现的弓网磨耗异常现象,找出其原因和解决办法,提出架空刚性接触悬挂拉出值(偏移值)布置的新思路。     

地理信息系统及其在TMIS中的应用

阐述了GIS的基本概念及特点，详细论述了当前广泛应用的开发工具，重点介绍了Maplnfo开发平台及设计方法，研究并提出了在现有TMIS系统基础上构建货车追踪地理信息系统的设想及方案。     

浅析海事执法中可能出现的法律适用错误

法律适用正确与否是决定海事行政执法行为正确与否的关键因素之一。法律适用是一个综合复杂的系统,需要考虑法律适用的基本原则、法律规范背后的法律精神等诸多因素,任何一方面错误,都可能导致海事执法行为的错误。     

减速齿轮箱安装精度控制技术在实船上的应用

新型舰船动力系统的许多重要设备属于研制产品,设备的安装质量是整个工程的关键,为使设备安装达到质量要求,运用平面方程计算程序,对舰船减速齿轮箱装置安装精度的控制技术进行了应用研究。该精度控制技术的方法简单,安装成本低,控制精度高并且控制方向准确。     

岩溶地基桥梁基础设计和施工

岩溶地区桥粱基础的设计是经常遇到且又难以处理的一种特殊情况。结合某新建铁路工程岩溶地区的桥梁基础设计,简要介绍岩溶地区桥梁基础设计方法。