试验样车对催化转化器评价结果的影响研究

本文首先简述了评价条件对催化转化器性能的影响。试验研究了样车对 催化转化器净化性能评价结果的重要影响，指出了催化转化器认证时指明其适用车型的必要性，建议任选转化效率或汽车排放量来评价催化转化器装车时的净化性能。     

建立有效干扰区的一种分析方法

雷达干扰压制区的定义及其建立理论比较成熟,认识也比较一致.从另一个角度研究建立有效干扰区的一种分析方法,计算有效干扰区的边界,导出圆形遮蔽区的概念,推出圆形遮蔽区半径的计算公式,最后用计算机进行模拟.     

强夯地基加固效果的评价及检测方法

强夯地基加固效果的评价主要是通过夯后的检测或夯前夯后的对比来表达,本文通过比较简要介绍了强夯加固效果检测方法及评价指标,以供参考。     

Design and evaluation of a hierarchical control architecture for an autonomous underwater vehicle

This paper researches on a kind of control architecture for autonomous undelwater vehicle （AUV）. After describing the hybrid property of the AUV control system, we present the hierarchical AUV control architecture. The architecture is organized in three layers： mission layer, task layer and execution layer. State supervisor and task coordinator are two key modules handling discrete events, so we describe these two modules in detail. Finally, we carried out a series of tests to verify this architecture The test results show that the AUV can perform autonomous missions effectively and safely. We can conclude the control architecture is valid and practical.     

非线性盈亏平衡分析在航运企业投资管理中的应用

本文通过分析航运企业的产量、成本和盈利三者的关系,运用非线性盈亏平衡分析揭示航运企业固定成本、变动成本、单价、收入总额、利润等变量之间的内在联系规律,为航运企业的会计预测、决策和规划提供重要依据。     

深水土坝构筑施工技术

深水中构筑土坝比堆石坝具有节约投资，不透水等优点，但在深水中构筑土坝要解决水中取砂机械选型、土体流失、土（砂）体密实、坝口合拢等技术难题。本文仅就上述问题进行了探讨。     

对高层建筑加压送风防烟系统的设计

针对高层民用建筑加压送风防烟的特点,在分析建筑物内人员疏散方式的基础上,着重探讨了发生火灾时,层门的开启层数,选择加压送风口的型式,加压送风防烟系统的阻力计算.     

3D Track-keeping Method for Autonomous Underwater Vehicle

In this paper, 3D track-keeping control method for autonomous underwater vehicle (AUV) with and without the influence of ocean current is investigated. Because the system to be controlled is highly nonlinear and strong coupled, an approach is used to divide it into two subsystems. One is to control the heading and the track error on the horizontal plane. The other is to control the pitch and the track error on the vertical plane. The results of computer simulation show that the autopilot works properly, it can capture the current waypoint and turns to track the next path automatically.     

Simulation study of plane motion of air cushion vehicle

This research is on horizontal plane motion equations of Air Cushion Vehicle (ACV) and its simulation. To investigate this, a lot of simulation study including ACV‘s voyage and turning performance has been done. It was found that the voyage simulation results were accorded with ACV own characteristic and turning simulation results were accorded with USA ACV‘s movement characteristic basically.     

沥青胶浆对沥青混合料粘弹性的影响

为了研究沥青胶浆对沥青混合料粘弹性的影响,采用简单性能试验(SPT)对矿粉、添加剂和沥青三者组成的沥青胶浆进行研究,分析了粉胶比、纤维和水泥用量变化对沥青混合料粘弹性的影响。结果表明,粉胶比、纤维和水泥对沥青混合料粘弹性的影响程度不同,但沥青胶浆中添加适量的纤维、水泥后均可以提高混合料的抗高温变形性能。随着加入纤维量的增加,沥青混合料动态模量减小,而粘性增大;在胶浆中加入水泥对提高混合料粘弹性的效果不明显。另外,混合料动态模量随粉胶比的减少,先增大后减小,相位角逐渐增大。因此,在混合料设计时应注意对胶浆构成的比例,以达到改善沥青混合料粘弹性的目的。