Will China’s airline industry survive the entry of high-speed rail?

This study investigates the effects of high-speed rail (HSR) services on Chinese airlines. Our analysis suggests that the HSR service will be competitive in terms of network connectivity, total travel time and cost efficiency. On the other hand, growth of the Chinese airline industry has been unbalanced in terms of traffic distribution, airline network development, airport capacity and share of international traffic. While the long term prospects of Chinese airlines are bright, the carriers must develop effective hub-and-spoke networks and increase their competitiveness in international markets in order to achieve sustainable growth in the coming years. For the Chinese government, continued investment at hub airports and support to low-cost carriers are also necessary.     

斜拉桥的美学构思与仿真

根据斜拉桥构造,阐述了斜拉桥的美学构思方法,以湖北省宜昌至巴东高速公路神农溪大桥主桥为例,探讨了斜拉桥美学仿真的基本步骤与方法,得到逼真的三维桥梁模型。     

模糊综合评价在多学科优化设计变量选择中的应用

以灵敏度分析理论为基础,将模糊数学综合评判理论应用于多学科优化设计变量的选择与评价。以某集装箱船为例,在建立了包含静力学、模态分析和动力学的多学科优化时设计变量选择的模糊评判数学模型之后,综合考虑了应力、位移、固有频率、速度和加速度等参数对设计变量的影响。分析表明,该方法简便易行、结果可靠。     

轨道交通(轻轨)车站结构设计探讨

在城市轨道交通(轻轨)地面车站,主要是高架车站的结构设计中,分析研究其荷载类型、荷载工况对车站结构计算的安全可靠性意义重大。其中还有有效控制沉降问题。该文分析荷载类型、荷载工况,建立计算模型提出看法,供设计人员参考。     

粘贴钢板补强技术在国贸桥加固中的应用

目前,用于桥梁补强加固的方法主要有碳纤维加固、粘贴钢板加固等。该文介绍了北京国贸桥一期异形板板底加固采用了粘贴钢板补强加固方法。即:采用化学锚栓将钢板锚固于桥面,钢板与桥面间预留缝隙,四周封口后采用高效改性环氧粘接剂灌注填充缝隙。此方法具有较高的强度、刚度、稳定性、整体性和耐久性,可供今后类似工程借鉴。     

农村生活污水处理研究

随着城市化进程的发展,人民生活水平的提高,上海市政府对社会主义新农村建设十分重视,提高新农村周边环境,尤其是水环境建设与保护中污水处理问题提上了议事日程。该文从农村生活污水治理的必要性出发,研究探索了国内外生活污水小型分散处理技术,从中找出符合农村实际的生活污水处理技术并加以应用。     

浅析桥梁灌注桩的施工质量控制与检测

该文指出:据统计分析,目前公路桥梁的下部结构基础施工中,大部分采用的是桩基础。桩基是一种极为有效、安全可靠的基础形式,能将上部结构荷载有效地传递到深层稳定的土层中,在很多程度上减少基础沉降。但是桩基础的施工,通常是在地面下或水下进行施工的,施工的工序比较复杂,质量控制难度比较大,稍有不慎易产生断桩等严重缺陷。因此,对桥梁桩基础的施工管理与质量检测就显得非常重要。     

斜拉桥的美学构思与仿真

根据斜拉桥构造,阐述了斜拉桥的美学构思方法,以湖北省宜昌至巴东高速公路神农溪大桥主桥为例,探讨了斜拉桥美学仿真的基本步骤与方法,得到逼真的三维桥梁模型.     

Reliability Analysis of Filtering Reducers Considering Temperature Correction and Shock Load of Space

Owing to some excellent properties (such as large transmission ratio, high reliability, high precision, large stiffness, small volume and long service life), filtering reducers are suitable for occasions with high requirements (e.g. space equipment). However, the tough working condition in space (including frequent changes of temperature, and large temperature difference combined with shock loads) may significantly affect the reliability. In this paper, the expressions of the minimal and maximal instantaneous transmission ratios (ITRs) considering temperature correction are developed. The minimal and maximal ITRs from simulation are used to verify the accuracy. Moreover, the reliability of a filtering reducer under different temperatures and the shock load are calculated, respectively. The research is beneficial to the design of spacecraft mechanism.     

震裂边坡的降雨稳定性研究

震裂边坡在地震灾区分布较广,是规模较大的潜在灾害,其在雨水下渗等外界影响因素的作用下稳定性可能会发生较大的变化.针对不同的裂缝位置、裂缝深度以及考虑是否灌水,运用ABAQUS大型有限元软件,开展均质土震裂边坡的降雨稳定性分析.结果揭示了上述不同情况下的震裂边坡在降雨中的变形破坏和稳定性变化的规律,为类似边坡的分析评价及工程治理提供借鉴.