面向智慧停车管理的宁波市鄞州区道路停车调研分析

本文通过介绍宁波市鄞州区的停车现状,分析了其停车发展的瓶颈和原因,结合智慧停车管理模式和万达片区智慧停车试点项目,提出了该区域实施智慧停车管理的对策和建议.     

几种新型薄壁组合结构的轴向冲击吸能特性研究

金属薄壁管是一种有效的吸能结构，并且在吸能体系中得到了广泛应用。用非线性有限元方法研究了轴向冲击载荷作用下方形直壁管和锥壁管的吸能特性，基于提高结构的吸能能力的考虑提出了几种锥壁组合结构和具有引发机制的直壁组合结构。数值计算结果表明组合结构的吸能能力较之原始结构有显著提高。     

基于ANSYS的成型卡盘优化设计

成型卡盘是轮胎成型机中的关键零件,直接影响轮胎的成型。本文简要介绍了ANSYS优化设计的原理和过程,并对成型机的内卡盘进行了参数化建模和优化分析。     

嵌入式设备上Mobile SVG显示的反走样算法研究

以嵌入式设备上Mobile SVG表示模型为基础.分析了反走样技术在低端设备上实现的具体问题.利用后滤波的原理.对多邻接点时新边界点的选择和轮廓端点的对称合成等同题进行了分析.采用构造拟合曲线查找表进行曲线拟合的方法实现反走样.由于映射关系独立于具体图形绘制而事先已经建立.因而计算量不大,对于低端设备图形应用非常适合.实验证明该方法用于Mobile SVG在嵌入式设备上显示时反走样有很好的效果.     

Research and implementation of cooperative cache for PVFS

At present, there are many effective ways to achieve high performance in cluster system storage management, including server-end disk, server-end caching, local caching and cooperative caching. The cooperative caching mechanism shares caches among different clients so as to avoid expensive disk access costs and to improve overall throughput of cluster system. In this paper, a Single Copy Cooperative Cache model is proposed together with block lookup algorithm, block replacement algorithm and the consistency algorithm based on the model. Meanwhile, the prototype system of the model is implemented in PVFS file system. Finally, the performance of this system is tested in InfiniBand Framework, the result of which shows that in contrast to the original PVFS system, read performance of PVFS file system is improved by about two times, while write performance is reduced by nearly ten percent.     

高速铁路隧道内瞬变气压和乘车舒适度准则

高速列车通过隧道时所诱发的各种空气动力学效应中,瞬变压力问题是需要在隧道设计中着重考虑的.瞬变压力不仅会作用于隧道结构和车辆,而且会对乘员健康和旅客乘车舒适度产生不利影响,文章对此进行了研究.同时,在对国外有关技术标准研究分析的基础上,通过现场试验着重对我国高速铁路隧道设计气压舒适度准则提出了建议.     

Laboratory alignment procedure for improving reproducibility of tyre wet grip measurement

Since 2012, the Korean and EU governments have been running a tyre labelling system. All tyres sold in Korea have to carry a label that displays information of two performance criteria: rolling resistance and wet grip. The rolling resistance of the tyres determines their fuel efficiency grading, and the wet grip of the tyres determines their braking safety grading. The rolling resistance and wet grip measurements must be reproducible, so the same tests on the same tyres in different laboratories must produce the same results to ensure a fair comparison between tyres from different suppliers. In addition, a good reproducibility of testing results prevents market surveillance authorities from obtaining results different from those provided by suppliers when testing the same tyres. The laboratory alignment procedure for the rolling resistance measurements was developed and published as the EU Commission Regulation No. 1235 in 2011. However, the laboratory alignment procedure for the wet grip measurements has not yet been developed. Therefore, there are many differences in the wet grip test results among test laboratories throughout the world. The new procedure that is proposed for the wet grip measurement alignment for tyre testing laboratories can improve the reproducibility of the wet grip testing results, and five laboratory alignment tests were carried out between KATECH and five other test laboratories in the world to evaluate the results of the proposed procedure.     

浅谈摩托车线束的设计及在整车上的布置(1)

介绍了摩托车线束上各个部件的选取原则及布线要点,使线束既能满足安全性要求又能保证线束车成本最优化。     

市政道路设施养护主要病害原因分析与处理方案探讨

该文介绍市政道路设施的主要病害,然后针对四大公用管线二次沟修、窨井盖、白改黑、小区出入口、施工缝等方面,发生裂缝、坑塘、凹陷等病害的原因进行分析,并提出针对性处理方案,以期达到预防市政道路设施病害的进一步发生,有效地提高市政道路设施养护寿命,节省养护经费。     

天文定位方法及运用探讨

驾驶人员时刻测定本船准确船位是保障船舶安全航行的基础.文中从天文定位的优势分析人手,介绍了太阳特大高度和白昼同时测天的定位时机,分析了具体定位程序与技巧.