三维块体分析方法及有效性验证

目前,大多数学者都采用极限平衡方法分析三维块体的稳定性,但这些极限平衡方法都有一些局限性。本文介绍了三维非连续变形分析(DDA)方法分析岩块的稳定性,并通过物理模型试验对三维DDA的有效性进行了验证。     

BOT融资模式在我国高速公路建设中的应用探讨

BOT作私人资本参与基础建设的一种实现方法，被普遍认为是非常适合于公路等公有部门的建设项目，但在我国的高速公路建设项目中却还处在尝试引入阶段。故促进BOT融资模式在我国高速公路建设项目中的广泛应用，是当前一项十分紧迫的工作任务。     

基于神经元芯片和单片机的双处理器结构模拟量输入AI节点的研究

目前大多数AI节点只具有单一的神经元处理器,其控制能力不高。针对这一现状,本文论述了基于神经元芯片MC143150和单片机AT89S51双处理器结构的AI节点的硬件和软件的设计过程。文章在硬件方面介绍了采用ADC0809模数转换芯片的数据采集系统、AT89S51和MC143150的接口及MC143150和物理网络的接口;在软件方面介绍了数据采集、并行slave A模式的通信和利用网络变量发送信息三方面的程序设计。     

试论期租人责任保险

在租入船业务日益增加的今天,租家是否有必要投保期租人责任保险?而且应如何选择期租人责任保险,文章从责任保险对期租人的必要性;期租人责任险的承保范围;如何安排期租人责任险三个方面,阐述了这个问题。     

长交路、轮乘制下如何抓好乘务员教育培训工作

本文以中铁一局新运朔黄运输公司配属17台SS4改型电力机车在朔黄铁路实行长交路、轮乘制后，机车利用率高，人员紧，机车乘务员教育培训难度大的实际情况下，以运转车间为例，提出有效的措施抓好乘务员的教育培训。     

岑悟高速公路软基处理措施

阐述了岑悟高速公路K26 060-K28 800段软土路基加固措施,提出了施工工艺流程及质量控制与注意事项。     

绝对值编码器通过PLC实现港口机械的角度测量

从格雷码与二进制码的互换和PLC编程两方面说明绝对值编码器怎样通过PLC实现角度测量的功能,指出了其在应用于港口装卸机械时应注意的事项.     

大型造船企业成本核算系统的设计与实现

本文根据中国船舶工业集团公司所属四大造船企业的特点，对造船成本核算系统具有共性的需求进行了研究分析，设计和实现了对工资、辅助生产、制造费用、制造管理费等费用的分配，对系统软件结构、数据间的关联和业务处理时序进行了论述。     

电子海图快速显示方法研究

根据电子海图的数据特点和单幅电子海图调图显示原理，提出了一种多幅电子海图拼图模式下的快速显示方法。该方法运用了计算机内存位图技术和内存缓冲技术，提高了电子海图显示速度和显示效果。该方法已被运用到某新型电子海图系统，并被证明能较好地解决拼图模式下无级缩放和快速漫游问题。     

A new approach for modeling of Fundamental Diagrams

According to the intra-vehicle interaction, a traffic flow can generally be divided into three homogeneous states (1) that of free driving, (2) that of bunched driving, and (3) that of standing. The parameter describing the state of free driving is the desired speed, for the state of bunching it is the intra-vehicle gaps (time headway) within the convoy and the mean speed of the convoy, and for the state of standing it is the maximum jam density. These are the most essential parameters which do not depend on the actual traffic situation.This paper introduces a new model which considers the Fundamental Diagram (equilibrium speed–flow–density relationship) as a function of the homogeneous states. All traffic situations in reality can be considered as combinations of the homogeneous states and therefore can be described by the essential parameters mentioned above. The non-congested (fluid) traffic is a combination (superposition) of the states of free driving and bunched driving, the congested (jam, stop, and go) traffic is a combination of the states of bunched driving (go) and standing (stop). The contribution of the traffic states within the differently congested traffic situations can then be easily obtained from the queuing and probability theory. As a result, Fundamental Diagram in all equilibrium traffic situations is derived as simple functions of the essential parameters.According to the new model the capacity of freeways and rural highways can be determined by measuring the essential parameters. This is much easier than measuring the capacity directly.Furthermore, the probabilities of the various traffic states can be obtained from the new model. This leads to new possibilities in real-time controlling and telematics.The new model is verified by comprehensive measurements carried out on freeways and rural highways in Germany.