摘要：为解决索穹顶结构存在的脊索易松弛失效、结构刚度及承载力较低、支撑环梁存在大量现场焊接等问题,面向工业化智能建造,研发全装配穿索式脊杆索穹顶结构体系,该体系由穿索式脊杆索穹顶及模块化装配环桁架两部分构成,基于节点平衡法提出结构预应力分布计算方法,对结构预应力分布进行分析。为验证结构极限承载性能,设计并制作缩尺1∶10、跨度10 m、矢跨比1/10的试验模型,对模型结构开展静力极限承载性能试验及数值模拟,研究全装配穿索式脊杆索穹顶结构在不同竖向荷载作用下的受力性能,获取结构破坏模式、受力机理、内力及位移变化规律及关键节点应变变化规律。研究结果表明:基于节点平衡法的结构预应力分布计算方法能够用于结构设计;全装配穿索式脊杆索穹顶结构具有较大的刚度、承载力、良好的稳定性及抵抗不均匀荷载能力,其正常使用极限状态对应承载力为设计荷载基本组合的2.2倍,其极限承载力安全系数为5.0;穿索式脊杆传力路径明确,受拉时仅脊索发挥作用,受压时脊杆发挥作用,脊杆屈曲破坏前,能够有效限制脊索松弛在12%左右;全装配穿索式脊杆索穹顶结构体系能够满足刚性屋面铺设需求,适用于大跨度及超大跨度空间结构建筑现场无焊接全装配建造。

摘要：目的研究含铜奥氏体不锈钢在室温及低温下的拉伸、成形性能。了解杯突试验背景下,含铜奥氏体不锈钢微观组织演变规律。方法在室温及液氮环境−140℃温度下,对含铜奥氏体不锈钢进行拉伸、埃里克森(Erichsen)杯突试验。结合试验结果、扫描电镜及透射电镜表征,分析了室温及低温环境对含铜奥氏体不锈钢各项性能的影响。结果含铜奥氏体不锈钢在−140℃时的极限抗拉强度提升约49.7%,屈服强度提升约35.5%,延伸率降低约27.3%。在室温下,拉伸断裂方式为韧性断裂。在低温下,拉伸断裂方式转变为脆韧混合断裂。在杯突试验中,突值从室温的12.78 mm增加到−140℃低温的13.45 mm,增加了0.67 mm。结论通过EBSD分析内部微观组织结构可知,在杯突试验过程中,应力的不断集中及应变的变化,促使位错产生滑移、孪晶,并使奥氏体发生马氏体相变。越靠近断裂裂纹区域,应力集中越明显,奥氏体转变为马氏体越明显,马氏体含量越多。孪晶诱导塑性(TWIP)及相变诱导塑性(TRIP)提高了不锈钢的强度和塑性。

摘要：为了给管道的布置和优化运行提供理论指导,降低建筑运行能耗,通过试验和数值模拟相结合的方法,比较了在不同管径和速度下弯管局部阻力系数、流体运动状态以及黏性耗散的变化,并利用沟槽法对弯管进行构件优化。结果表明:随着管径增大,形变构件对弯管内流体的影响逐渐减小,转折段和下游直管段内低速区面积逐步减小。当入口速度为1.1 m/s时,不同管径弯管的局部阻力系数未完全按照已有的幂函数规律变化,DN40~DN65弯管的局部阻力系数大小近似相等,DN100~DN125局部阻力系数也大致相等,这与其内部流体运动状态和受力有关。利用上述理论研究进行构件优化,在质壁分离区域加入沟槽,可减少弯管局部阻力损失,同时缩减低速区域范围,减小机械能消耗。加入沟槽后的弯管,在较小的入口流速v=0.5 m/s处局部阻力的优化最为明显,局部阻力降低了63.96%。研究结果可为工程中弯管的设计布置以及结构优化提供参考。

摘要：In the decade after 1969,Heaney reached the climax of his poetry composition,in which he published four volumes of poetry,Door into the Dark,Wintering Out,North and Field Work to explore the nature and origin of the hatred and violence in Northern *** thesis focuses on five representative bog poems written in the period to explain according to Homi ***’s postcolonial theory how the bog bodies configurate the hybrid space and how it reflects the Third Space of Northern ***,the thesis argues that from the construction of the Third Space,Heaney achieves temporary harmony between his artistic and realistic responsibility.

摘要：In 2015, a new film Mr. Six, shot by the famous Chinese film director Feng Xiaogang, was widely discussed in the Chinese academia. Some scholars link this movie to Utopia that it reflects utopian imagination in contemporary Chinese society. Does ＂Juyi halr＂1 stand as the Utopian image in contemporary Chinese society？ If for a period in the history of the outlaw Lin Chong ＂to join rebels＂ and go to ＂Juyi hall＂ was a Utopian image, so is it still the case today？ In my point of view, to consider the process of modernization of Chinese society, to consider contemporary Chinese society, the Chinese form of Utopia is a significant theoretical issue.

摘要：新时代为美育发展赋予了新的内涵,使“以美育人”“以美化人”“以美培元”的理念深入人心。《义务教育艺术课程标准(2022年版)》进一步促使新时代美育的落地与实施,“以美育人”成为建设素养型艺术课程标准之一。美育对人们道德的完善和智力的开发产生了深远影响。艺术新课标提出了审美感知、艺术表现、创意实践、文化理解的艺术学科核心素养。实现艺术课程的育人目标,需要转变教师的教育理念,革新教学模式,同时创新对学习任务的评价。

摘要：In the era of cultural economy or aesthetic capitalism, the relationship between humanities and science has undergone great changes that include four aspects： （1） the humanities are compatible with and dependent on science rather than antagonism and conflict; （2） the content and form of humanities have so greatly changed that the new humanities discipline has appeared; （3） in contemporary scientific and cultural development pattern, new humanities have gradually become the principal discipline; （4） aesthetics and art gradually highlight its importance. Based on the thoughts of Karl Marx＇s Economic and Philosophic Manuscripts of 1844, this paper intends to discuss the essence and significances of the modernity problem in contemporary society. And then, it analyzes ＂how to think about the future＂ in the era of aesthetic capitalism or cultural economy. In the last part of the paper, several characteristics of the new humanities are studied from the perspective of contemporary aesthetics.

摘要：在配电系统规划中,存在完善性不强的问题,设计一种基于小波分解-暂态信号的配电系统网格化统筹规划算法。基于遗传算法构建网格划分模型,在模型构建中,将第一个目标函数定为降低馈线跨越供电网格的实际数量,将第二个目标函数定为使电网联络线处于同一个供电网格中,将第三个目标函数定为尽量使线路配变器处于同一个供电网格中。设计约束条件,并根据网格划分结果实施供电网格划分。对网格化分区的暂态信号数据实施小波分解,根据暂态信号数据与负荷密度调查结果,实施负荷预测。在满足各区块负荷中心与城市街道走向的约束下,设计一种最短路径规划算法,寻找各区块的主要供电干线与区块间与主干线相联络的最短路径,完成网格化统筹规划。统筹规划测试结果表明,该配电系统不存在匹对线段与主供线段交叉的问题,网格化统筹规划效果较佳。

摘要：Based on feature modeling and mathematical analysis methods,a process-oriented and modular parametric design system for advanced turbine cooling blade is developed with UG API,aiming at the structural complexity and high design difficulty of aero-engine cooling turbine *** relationship between the external and internal body features,the body attached feature is analyzed as viewed from the feature and parameter *** parametric design processes and design examples of the external body shape,tenon,platform and internal body shape,ribs,pin fins are *** system improves the design efficiency of cooling turbine blade and establishes the foundation of multidisciplinary design optimization procedure for it.

摘要：This article believes that ＂Chinese Dream＂ has three dimensions： First, ＂Chinese Dream＂ is the inevitable demands of Chinese reconstruction and it is the deepest desire of Chinese nation since the Chinese modern history. Second, the modernism of socialism with Chinese feature is the process of Chinese modernism. Third, the third theoretical dimension, 1 believe, is the ideal of socialism. I would like to take the film ＂Lost＂ and ＂Peking Monk＂ as examples and analyze the specific form of expression. This article is going to indicate in the end that ＂the revolution of aesthetics＂ and the assignments of critics, which can be recognized as the intuitive ability, could merge the historical affair and the human nature, which literature comprise, together and deliver deeper analyses and appraise The mission of critics is not only to distinctly emerge the aesthetic form of the literal works, but also analyze and seize the ＂aesthetic form＂ of them, that is to say, their mission is to find the aesthetic meanings of aesthetic expression from commonage in order to achieve the goal of leading and stimulating people ensuing the consciousness and liberation of culture. That is the most important mission and responsibility of Marxist literal criticism and literal critics. This is a rather tough task and refers to the new understanding and attitude to the relative questions of literature and culture. In the eyes of some self-complacent intellectuals, the responsibility for literature and critics is the ＂aesthetic entertainment＂ and ＂spiritual redemption＂. The significance of Marxist Aesthetics lies in that it upgrades the general ＂literal principle＂ and ＂aesthetic principle＂ in to a level of social development and national deliverance, and also it regards whether the literature having the function of cultural libration as the more pivotal content. The assignment for the critics and litterateurs is to engage and promote the production and promulgate for this significance, the cultura