电涡流缓速器涡流折算系数的计算方法

分析了涡流折算系数对电涡流缓速器制动力矩理论计算的影响。通过对两种型号电涡流缓速器制动力矩实验数据的分析,建立了关于涡流折算系数的微分方程。利用MATLAB直接搜索工具箱得到微分方程的初值条件,再通过龙格-库塔法求解该微分方程获得涡流折算系数的数值解。根据这一计算方法对电涡流缓速器制动力矩进行验证计算,计算结果与实验数据基本一致,说明此计算方法是可行的且解决了电涡流缓速器在改型优化和新产品设计中存在的难题。     

置换通风在船舶会议室内的适用性研究

室内空气品质的优劣直接影响人员的工作效率。文中以某船舶会议室作为研究对象,建立其非空态条件下采用置换通风方式的船舶舱室内气流组织数学模型,通过求解RNGκ-ε紊流方程,获得了采用置换通风方式的船舶会议室内空气品质分布规律。结果表明,结合舱室内热源的分布特征,利用热源产生的浮升力作用,合理布置送回风口的位置,船舶会议室人员活动区平均风速在0.15m/s以下、01~1.1m高度内垂直温差小于1℃,能量利用率大于1,获得良好的气流组织和热舒适性,有效地提高了船舶会议室的空气品质。     

51800DWT成品油船变频器在主机海水冷却系统上的应用

本文介绍了51 800 DWT成品油船变频器在主机海水冷却系统的应用,分析并解决了海水泵变频器在设计和调试过程中存在的问题。     

同步碎石封层技术在北疆地区公路养护中的应用

在新疆北部低温、严寒、降水量较大地区采用同步碎石封层技术对试验路段各路况指标进行跟踪检测，验证同步碎石封层对原路面行驶质量、路面损坏状况、抗滑能力的改善效果以及其防渗水、抗水损坏作用，从而得出同步碎石封层具有优良路面养护性能的结论。     

Indoor GPS技术及其在工业领域中的应用

Indoor GPS技术是在GPS技术原理启发下开发的用于室内精密定位的测量系统.详细介绍了Indoor GPS技术的测量原理和系统组成,从基础设施、测量阵列、简单测量、复杂测量、局域改正以及实时协作等方面对Indoor GPS及GPS进行了分析和比较.最后介绍了其在航空航天、汽车船舶以及工业测量等领域的具体应用情况.     

节水型简易公共汽车洗车台

我公司自行设计建造的适合于小型公交停车场使用的节水型简易洗车台,具有投资少、节约用水和便于维护等优点. 1 总体设计方案 本洗车台采用人工清洗方式进行车辆外表和底盘的清洗.清洗车辆外表时,使用毛刷、清水清洗;清洗底盘将车辆停在地沟上,用具有一定压力的水流冲洗.     

基于petri网的电控发射系统可靠性评估

以气动不平衡式鱼雷发射装置电控发射系统作为研究对象,针对电控发射系统的电控序列建立了petri网,得到标识可达树仿真结果,并以此对电控发射系统的可靠性进行分析评估.     

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.     

评析新《会计法》的实施基础及经济后果

随着改革的深化、开放的扩大和社会主义市场经济的发展，现行《会计法》已难以适应变化了的形势和国家加强宏观经济调控的要求，需要进行修改。主要表现在：     

A High-performance Low Cost Inverse Integer Transform Architecture for AVS Video Standard

A high-performance, low cost inverse integer transform architecture for advanced video standard (AVS) video coding standard was presented. An 8×8 inverse integer transform is required in AVS video system which is compute-intensive. A hardware transform is inevitable to compute the transform for the real-time ap-plication. Compared with the 4×4 transform for H.264/AVC, the 8×8 integer transform is much more complex and the coefficient in the inverse transform matrix Ts is not inerratic as that in H.264/AVC. Dividing the Ts into matrix S8 and R8, the proposed architecture is implemented with the adders and the specific CSA-trees instead of multipliers, which are area and time consuming. The architecture obtains the data processing rate up to 8 pixels per-cycle at a low cost of area. Synthesized to TSMC 0.18 μm COMS process, the architecture attains the operating frequency of 300 MHz at cost of 34 252 gates with a 2-stage pipeline scheme. A reusable scheme is also introduced for the area optimization, which results in the operating frequency of 143 MHz at cost of only 19 758 gates.