摘要：The importance of urban portal has been improved, but the phenomenon of image convergence has become increasingly prominent. The urban design of urban portal area should analyze and refine the regional culture of landscape culture, life culture, architectural culture, historical culture and so on, and combine with the design contents such as functional orientation, spatial pattern, public space, architectural style and landscape environment.

摘要：以成兰铁路沿线的桩板墙加固边坡为原型,设计并完成了几何相似比为1:10的地震动模拟振动台试验,并采用HHT时频分析方法分析桩板墙加固边坡地震响应特性,研究结果表明:在加载不同幅值地震波过程中,板式挡墙加固堆积体滑坡的加速度响应表现出明显的高程效应,且在0.3g地震波作用下,滑坡的高程效应最为显著,然后随幅值增大高程效应逐渐减弱。桩板式挡墙的桩身动土压力沿桩身呈非线性分布,其包络线的大小和范围与地震波幅值成正比。桩身最大动土压力出现在嵌入截面处,故需注意该部位的加固设计。桩身的位移响应同样随地震波幅值逐渐增大,耦合位移模式则由以平动为主转变为转动为主。此外,利用基于HHT变换的时频分析方法研究桩板式挡墙加固堆积体滑坡地震稳定性是可行的。通过Hilbert能量谱分析得到地震能量主要集中在2~6 s时域范围内,对应的频域为10~50 Hz。随着输入地震波幅值的增加,滑床和滑体测点的Hilbert能量在时频域上的差异性增大,两者的地震响应差异性显著增大。通过Hilbert边际谱可以识别到滑坡内部的损伤情况,受桩板式挡墙作用滑坡底部的损伤主要发生在坡面,而滑坡中部的损伤主要发生在内部。

摘要：According to the technical characteristics of short fixed wheelbase of a high-speed carriage, a subgrade-track integrated space mechanical response analysis model is proposed for trains under the action ofbiaxial load after the comparison of the stress distribution characteristics of the ballast track subgrade bed structures for high-speed railway under the action of uniaxial load and biaxial load. The loading threshold value （high-cycle long-term dynamic strength） under the circum- stance where the cumulative deformation of subgrade structure gradually develops and finally reaches the convergent state, and its relationship with the foundation coefficient K30 were deduced, based on the characteristics of cumulative defor- mation evolution obtained from the unit structure filling model test under the action of cyclic loading. In view of structure stability and frost resistance requirements of the railway subgrade in cold regions, technical conditions to maintain good service performance of subgrade structure of high-speed railway ballasted track are discussed and analyzed. Study results show that the additive effect manifests itself obviously for railway train bogies under the action of biaxial load than uni- axial load, which has a significant dynamic effect on the subgrade bed bottom and a slight effect on the surface layer. Thus, the adoption of a biaxial load model in the design of a high-speed railway subgrade accurately reflects the vehicle load. Pursuant to the structure design principle, the design method of the subgrade structure of high-speed railway ballasted track is proposed to meet the technical requirements such as structural strength, bearing stiffness and high-cyclic and long-term stability. Technical indicators are obtained for the variation of thickness of the surface layer of reinforced sub- grade bed in the double-layer subgrade mode along with the change of K30 at the subgrade bed bottom. The double-layer structure mode of ＂closure on the upper

摘要：Based on Robert ***’s theoretical frame of social urban study,the“psychophysical mechanism”,urban poetics mainly researches the mutual relations between the physical and the moral organizations of a city in urban poems,novels and *** article considers John Updike as an urban poet since his poem collection Americana(2001)is a collection of urban *** of the representative poems,the sonnet“New York City”,depicts a despairing“separate nation”by presenting three typical physical cityscapes:television,beggars and *** physical cityscape reveals its cultural value and social tradition of the city,and the psychological problems of the city *** Updike’s personal urban experience and the poem’s intertextual space,this article explores his criticism on American big city:the alienated human relations,the anxiety of city life and the smallness of *** intention to parody John Milton’s Pandemonium in Paradise Lost,and to pay homage to Walt Whitman,reveals that this sonnet embodies rich connotations of urban poetics.

摘要：This paper presents an investigation into the characteristics of interior noise of a Chinese high-speed train under several typical conditions. Interior noises within Vehicle TC01, which can be used as a head car or an end car, and Vehicle TP03, the third car counting from TC01, are measured for the train running at speeds from 260 km/h to 385 km/h, along two types of track including a slab track and a ballast track and either on the ground surface or in a tunnel. Data analyses are performed for sound pressure overall levels, frequency, area contributions, and possible generation mechanisms, showing how they are affected by train speed, running direction, track type, and tunnel. The results show that, whether TC01 is used as head car or end car, the interior noise characteristics in the VIP cabin are mostly related to aerodynamic noise. Differences in interior noise between tracks become smaller as the train speed increases. The effect of a tunnel on the interior noise is more important for the middle coach than that for the head coach. This study can provide a basis for noise control of high-speed trains.

摘要：随着穿越活断层隧道工程建设的飞速发展,跨断层隧道的分析和设计方法迫切需要相应的理论指导。本研究通过振动台模型试验和数值模拟,探讨了断层位错和地面运动对不同长度管片衬砌结构的影响规律和破坏机制。结果表明,随着衬砌纵向连接刚度(节理和节段衬砌)的减小,上盘与断裂带之间的结构相对位移减小,而下盘与断裂带之间的结构相对位移变化趋势相反。因此,应根据工程要求将靠近上盘的衬砌段划分为较小的段,而靠近下盘的衬砌段应划分为较大的段。结合试验结果提出了断层附近影响带的设防范围。在划分分段长度时还应考虑衬砌接缝的作用,以便在断层位错的影响下实现纵线的平滑过渡。本文数值模拟的破坏演化过程与振动台试验结果吻合较好。

摘要：The female images in Shakespeare’s plays are diverse and colorful,showing the typological deformation value of *** brave female women in his plays,such as Juliet in Romeo and Juliet,Portia in The Merchant of Venice,Cordelia in King Lear,are the same type and equivalent topological *** artistic terms,the three women of the same type with their own characteristics are the deformed topological space under the principle of equivalence,which is embodied vividly in the source *** thesis purposed to investigate whether the translation of Zhu Shenghao also reflected the equivalent deformation of Shakespeare’s original *** study texts the validity of the target text from the source text,proves the evaluation mechanism and function of topology in the process of translation and explains how the translation is equivalent to the original.

摘要：Topology,as a branch of mathematics,studies on the invariability of topological spaces after topological transformation,whose essence is topological *** the perspective of cultural inheritance and coherence,translation is essentially topological *** literary translation,complete equivalence is almost *** equivalence can be used to transform the text dynamically,which means that the translation remains the fundamental properties of the original ***,people can understand the meaning of the text based on another culture from different cultural *** the view point of topology,the present paper purports to examine Liang Shiqiu’s translation of Shakespeare’s Midsummer Night’s Dream,and found that the translation remains the features of source text by rendering effective topological strategies to realize topological equivalence and promote cultural exchanges between China and the West.

摘要：Past editions of the American Association of State Highway and Transportation Officials （AASHTO） Guide for Design of Pavement Structures have served well for several decades; nevertheless, many serious limitations exist for their continued use as the nation＇s primary pavement design procedures. Researchers are now incorporating the latest advances in pavement design into the new Mechanistic-Empirical Pavement Design Guide （MEPDG）, developed under the National Cooperative Highway Research Program （NCHRP） 1-37A project and adopted and published by AASHTO. The MEPDG procedure offers several dramatic improvements over the current pavement design guide and presents a new paradigm in the way pavement design is performed. However, MEPDG is substantially more complex than the AASHTO Design Guide by considering the input parameters that influence pavement performance, including traffic, climate, pavement structure and material properties, and applying the principles of engineering mechanics to predict critical pavement responses. It requires significantly more input from the designer. Some of the required data are either not tracked previously or are stored in locations not familiar to designers, and many data sets need to be preprocessed for use in the MEPDG. As a result, tremendous research work has been conducted and still more challenges need to be tackled both in federal and state levels for the full implementation of MEPDG. This paper, for the first time, provides a comprehensive bird＇s eye view for the MEPDG procedure, including the evolvement of the design methodology, an overview of the design philosophy and its components, the research conducted during the development, improvement, and implementation phases, and the challenges remained and future developments directions. It is anticipated that the efforts in this paper aid in enhancing the mechanistic-empirical based pavement design for future continuous improvement to keep up with changes in trucking, materials, c

摘要：E-commerce present opportunities and challenges for businesses, especially for micro-enterprises. This paper proposed a theoretical framework that in line with the unique characteristics of E-commerce acceptance in micro-enterprises in Chengdu, which is based on the unified theory of acceptance and use of technology （UTAUT） model. The extending UTAUT model includes key constructs of performance expectation, perceived behavioral control and the characteristics of owner-managers.