Xi'an Jiaotong University (XJTU)has carded out the research of additive manufacturing (AM)since 1993,who is one of the earliest institutes majoring in AM.After 20years of effort,XJTU has made great progress on the...Xi'an Jiaotong University (XJTU)has carded out the research of additive manufacturing (AM)since 1993,who is one of the earliest institutes majoring in AM.After 20years of effort,XJTU has made great progress on the additive manufacturing of polymer,metals,ceramics,composite materials and intelligent materials.XJTU has established a research team that features the engineering application of rapid manufacturing system.展开更多
As one of the oldest universities of modern China, Southwest Jiaotong University has experienced its grand journey transcending 3 centuries, witnessing 18 relocations. Known as ＂the Cornell of the East＂ and the birt...As one of the oldest universities of modern China, Southwest Jiaotong University has experienced its grand journey transcending 3 centuries, witnessing 18 relocations. Known as ＂the Cornell of the East＂ and the birthplace of China＇s modern education in transportation, mining and metallurgy and civil engineering, the university is now on the list of China＇s ＂211 Project＂, ＂985 Project Innovation Platform＂ and ＂2011 Plan＂. As the front-runner of rail transportation, Southwest Jiaotong University is now playing its active role in facilitating the globalization of China＇s high-speed railway.展开更多
The dynamics of wire array Z pinches are greatly affected by the initial state of the wires,which can be preconditioned by a prepulse current.Recent advances in experimental research on preconditioned wire array Z pin...The dynamics of wire array Z pinches are greatly affected by the initial state of the wires,which can be preconditioned by a prepulse current.Recent advances in experimental research on preconditioned wire array Z pinches at Xi’an Jiaotong University are presented in this paper.Single-wire explosion experiments were carried out to check the state of the preconditioning and to obtain the current parameters needed for wire gasification.Double-wire explosion experiments were conducted to investigate the temporal evolution of the density distribution of the two gasified wires.Based on the results of these experiments,a double-pulse Z-pinch facility,Qin-1,in which a 10 kA prepulse current was coupled with the 0.8 MA main current was designed and constructed.Wire arrays of different wire materials,including silver and tungsten,can be preconditioned by the prepulse current to a gaseous state.Implosion of the two preconditioned aluminum wires exhibited no ablation and little trailing mass.展开更多
This paper focuses on the female English teachers＇ work-related stress in the School of Foreign Languages, Xi＇an Jiaotong University. A survey produced some results that are worth studying. The teachers in this spec...This paper focuses on the female English teachers＇ work-related stress in the School of Foreign Languages, Xi＇an Jiaotong University. A survey produced some results that are worth studying. The teachers in this special group are keeping their heavy-burdened teaching job by finding ways to escape their work-related stress and at the same time trying to save face. Answers to the questionnaire have proved that Chinese cultural characteristics have been deeply rooted in the SFL teaching staff even though they have accepted and learned western culture over a period of many years.展开更多
With an increasingly number of cars on campus, the campus is faced with challenges of traffic order and safety. This paper, based on traffic calming and practical experience, took the Xipu campus of Southwest Jiaotong...With an increasingly number of cars on campus, the campus is faced with challenges of traffic order and safety. This paper, based on traffic calming and practical experience, took the Xipu campus of Southwest Jiaotong University as an example. Grounded on the traffic situation and characteristics of Xipu campus, the study analyzed the concept of traffic calming and its engineering measures, put forward traffic calming design scheme for Qiuhua Road on the Xipu campus with practical application of campus traffic characteristics, and stated the significance of campus traffic calming for its driving effect in creating an atmosphere of "environment cultivation" on campus. Finally, this paper discussed the development and application of traffic calming in China.展开更多
随着互联网技术的发展以及社交网络的扩大,网络平台已经成为人们获取信息的一个重要途径。标签的引入提升了信息分类及检索效率。同时,标签推荐系统的出现不仅方便了用户输入标签,还提高了标签的质量。传统的标签推荐算法通常只考虑标...随着互联网技术的发展以及社交网络的扩大,网络平台已经成为人们获取信息的一个重要途径。标签的引入提升了信息分类及检索效率。同时,标签推荐系统的出现不仅方便了用户输入标签,还提高了标签的质量。传统的标签推荐算法通常只考虑标签和项目两个主体,而忽略了用户在选择标签时个人意图所起到的重要作用。由于在标签推荐系统中标签最终由用户确定,因此用户的偏好在标签推荐中起着关键作用。为此,引入用户作为主体,并结合用户发布的历史帖子的先后顺序,将标签推荐任务建模为更加符合真实场景的序列标签推荐任务。提出了一种基于MLP的序列标签推荐方法(MLP for Sequential Tag Recommendation, MLP4STR),该方法显式地建模用户偏好用于引导整体标签推荐。MLP4STR采用一种跨特征对齐的MLP序列特征提取框架,将文本和标签的特征对齐,获取用户的历史帖子信息和历史标签信息中隐含的用户动态兴趣。最后,结合帖子内容和用户偏好进行标签推荐。在4个真实世界的数据集上得到的实验结果表明,MLP4STR能够有效地学习序列标签推荐中的用户历史行为序列的信息,其中,评价指标F1@5较最优的对比算法有显著提升。展开更多
红层泥岩水敏性高,作路基填料时可用石灰改良。受季节变化影响,路基基床经历干湿循环,导致服役性能降低。为研究干湿循环下改良填料力学特性劣化规律,开展一系列干湿循环试验、无侧限抗压试验和弯曲元试验测定改良填料无侧限抗压强度和...红层泥岩水敏性高,作路基填料时可用石灰改良。受季节变化影响,路基基床经历干湿循环,导致服役性能降低。为研究干湿循环下改良填料力学特性劣化规律,开展一系列干湿循环试验、无侧限抗压试验和弯曲元试验测定改良填料无侧限抗压强度和小应变刚度。结合连续滴水扫描电镜(scanning electron microscope,简称SEM)试验,揭示干湿循环后填料微观结构劣化特征。结果表明:低幅度循环下试样在干侧和湿侧均产生体胀。高幅度循环下试样在湿侧产生体胀。在干侧先产生体缩,随循环次数增加,即使含水率较低,试样也产生体胀。体胀导致强度和小应变刚度均有不同程度的劣化。当试样产生体缩时,强度有所增长,但小应变刚度由于裂缝衍生而持续衰减。试样强度随损伤体变可用统一劣化方程表示。但高幅度循环下试样干燥后的小应变刚度远低于劣化线,且劣化速率远大于强度。试样滴水后能维持基本形貌,但观察到团聚体松散、微粒剥落和新生裂缝等结构劣化特征,从而导致宏观力学性能衰减。展开更多
文摘Xi'an Jiaotong University (XJTU)has carded out the research of additive manufacturing (AM)since 1993,who is one of the earliest institutes majoring in AM.After 20years of effort,XJTU has made great progress on the additive manufacturing of polymer,metals,ceramics,composite materials and intelligent materials.XJTU has established a research team that features the engineering application of rapid manufacturing system.
文摘As one of the oldest universities of modern China, Southwest Jiaotong University has experienced its grand journey transcending 3 centuries, witnessing 18 relocations. Known as ＂the Cornell of the East＂ and the birthplace of China＇s modern education in transportation, mining and metallurgy and civil engineering, the university is now on the list of China＇s ＂211 Project＂, ＂985 Project Innovation Platform＂ and ＂2011 Plan＂. As the front-runner of rail transportation, Southwest Jiaotong University is now playing its active role in facilitating the globalization of China＇s high-speed railway.
文摘The dynamics of wire array Z pinches are greatly affected by the initial state of the wires,which can be preconditioned by a prepulse current.Recent advances in experimental research on preconditioned wire array Z pinches at Xi’an Jiaotong University are presented in this paper.Single-wire explosion experiments were carried out to check the state of the preconditioning and to obtain the current parameters needed for wire gasification.Double-wire explosion experiments were conducted to investigate the temporal evolution of the density distribution of the two gasified wires.Based on the results of these experiments,a double-pulse Z-pinch facility,Qin-1,in which a 10 kA prepulse current was coupled with the 0.8 MA main current was designed and constructed.Wire arrays of different wire materials,including silver and tungsten,can be preconditioned by the prepulse current to a gaseous state.Implosion of the two preconditioned aluminum wires exhibited no ablation and little trailing mass.
文摘This paper focuses on the female English teachers＇ work-related stress in the School of Foreign Languages, Xi＇an Jiaotong University. A survey produced some results that are worth studying. The teachers in this special group are keeping their heavy-burdened teaching job by finding ways to escape their work-related stress and at the same time trying to save face. Answers to the questionnaire have proved that Chinese cultural characteristics have been deeply rooted in the SFL teaching staff even though they have accepted and learned western culture over a period of many years.
基金Sponsored by Study on Synergetic Planning and Spatial Optimization of Urban Comprehensive Passenger Transportation Hub and Its Adjacent Area(51478388)
文摘With an increasingly number of cars on campus, the campus is faced with challenges of traffic order and safety. This paper, based on traffic calming and practical experience, took the Xipu campus of Southwest Jiaotong University as an example. Grounded on the traffic situation and characteristics of Xipu campus, the study analyzed the concept of traffic calming and its engineering measures, put forward traffic calming design scheme for Qiuhua Road on the Xipu campus with practical application of campus traffic characteristics, and stated the significance of campus traffic calming for its driving effect in creating an atmosphere of "environment cultivation" on campus. Finally, this paper discussed the development and application of traffic calming in China.
文摘随着互联网技术的发展以及社交网络的扩大,网络平台已经成为人们获取信息的一个重要途径。标签的引入提升了信息分类及检索效率。同时,标签推荐系统的出现不仅方便了用户输入标签,还提高了标签的质量。传统的标签推荐算法通常只考虑标签和项目两个主体,而忽略了用户在选择标签时个人意图所起到的重要作用。由于在标签推荐系统中标签最终由用户确定,因此用户的偏好在标签推荐中起着关键作用。为此,引入用户作为主体,并结合用户发布的历史帖子的先后顺序,将标签推荐任务建模为更加符合真实场景的序列标签推荐任务。提出了一种基于MLP的序列标签推荐方法(MLP for Sequential Tag Recommendation, MLP4STR),该方法显式地建模用户偏好用于引导整体标签推荐。MLP4STR采用一种跨特征对齐的MLP序列特征提取框架,将文本和标签的特征对齐,获取用户的历史帖子信息和历史标签信息中隐含的用户动态兴趣。最后,结合帖子内容和用户偏好进行标签推荐。在4个真实世界的数据集上得到的实验结果表明,MLP4STR能够有效地学习序列标签推荐中的用户历史行为序列的信息,其中,评价指标F1@5较最优的对比算法有显著提升。
文摘红层泥岩水敏性高,作路基填料时可用石灰改良。受季节变化影响,路基基床经历干湿循环,导致服役性能降低。为研究干湿循环下改良填料力学特性劣化规律,开展一系列干湿循环试验、无侧限抗压试验和弯曲元试验测定改良填料无侧限抗压强度和小应变刚度。结合连续滴水扫描电镜(scanning electron microscope,简称SEM)试验,揭示干湿循环后填料微观结构劣化特征。结果表明:低幅度循环下试样在干侧和湿侧均产生体胀。高幅度循环下试样在湿侧产生体胀。在干侧先产生体缩,随循环次数增加,即使含水率较低,试样也产生体胀。体胀导致强度和小应变刚度均有不同程度的劣化。当试样产生体缩时,强度有所增长,但小应变刚度由于裂缝衍生而持续衰减。试样强度随损伤体变可用统一劣化方程表示。但高幅度循环下试样干燥后的小应变刚度远低于劣化线,且劣化速率远大于强度。试样滴水后能维持基本形貌,但观察到团聚体松散、微粒剥落和新生裂缝等结构劣化特征,从而导致宏观力学性能衰减。
