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最近建设完成的京沪高速铁路上海虹桥站结构中,有一种钢桁架-钢管混凝土柱焊缝连接的新型节点,该节点构造和受力性能极其复杂。本文对该节点进行了1∶4缩尺模型承载力试验研究,介绍了如何实施对该复杂节点加载的试验方法,讨论了节点的受力性能、薄弱环节和破坏模式。试验表明该节点构造设计有效,具有足够的承载力,可达到设计荷载的3倍,并具有良好的塑性变形能力。但是,节点也显示出薄弱坏节,表现为在钢桁架受拉斜腹杆翼缘与节点环板竖向加劲肋的焊接部位出现开裂现象。建议适当增大受拉斜腹杆端部的翼缘弯折曲率半径,平缓腹杆向竖向加劲肋的传力,可使节点性能得到进一步完善。

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ordnance Industry Automation is the property of Editorial Board for Ordnance Industry Automation and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering for Thermal Energy & Power / Reneng Dongli Gongcheng is the property of Journal of Engineering for Thermal Energy & Power and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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Copyright of Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of South China Fisheries Science is the property of South China Fisheries Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China Medical University is the property of Journal of China Medical University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The practice course entitled embedded direction course design is established to solve the existing problem of student abilities of embedded software development. To enable students forming the notion of model driven in embedded software development, and practice the project with a certain degree of complexity, the course construction concept of school-enterprise cooperation is established. Then ZIPC as an embedded software modeling and development tool is introduced in the course. The course content and corresponding teaching program are designed based on XIPC. After two years of teaching practice, some certain results are achieved. [ABSTRACT FROM AUTHOR]

Copyright of Computer Engineering & Science / Jisuanji Gongcheng yu Kexue is the property of Computer Engineering & Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Taking the courses of computer composition principle experiment as an instance, with the help of intelligent mobile device, in order to inspire the college students’ interest in learning, an assistant teaching integration platform is constructed. We build up a we chat platform of computer composition principle experiment, which can deliver the PPT and teaching video etc to the students, make the study process more convenient. Design and implement can be completed in the mobile virtual simulation System so that the students can practise after class. The platform can construct the mobile preparation, test and evaluation System which makes the evaluation of the students more accurate. The application of the platform improves students study enthusiasm. [ABSTRACT FROM AUTHOR]

By summing up the opening experimental construction content since 2011 of our school, the coexistence of traditional experiment teaching in class and opening experimental teaching are proposed, which both take care of popular education and the innovative talents cultivation. A study is made on how to balance the basic and comprehensive experiment and make them promote each other. New communication method via Wechat and Wechat platform is established. It makes the students and teachers closer. The hierarchical and task-driven experiments arouse the students' interest. From all aspects, the opening experiment brings the outstanding innovative talents cultivation into practice. [ABSTRACT FROM AUTHOR]

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to comprehensively study the impact of cold-forming effect on the yield strength and other mechanical properties, existing data of material property tests on steel plate specimens and short column tests on steel tube specimens is collected. The variables covered in the test database include the section form, steel grade, manufacturer, thickness and cold-forming method of steel tubes. A design formula for the yield strength of cold-formed rectangular steel tubes with medium thicknesses is proposed, which takes due consideration of the cold-forming effect and is suitable for the characteristics of steel in China. In order to verify the applicability of the proposed formula, comparisons between the yield strength calculated based on design standards from different countries, the proposed formula and results from stub column tests are carried out. The comparisons indicate that the North America code (AISI S100-2007), the Europe code (EN 1993-1-3：2006) and Canada code (CAN3-S136-M84:1984) overestimate some of the test results for short column specimens. In addition, the yield strengths calculated based on the GB 50018—2002 ‘Technical code of cold-formed thin-walled steel structures’ in China are greater than the test results for some short column specimens with steels manufactured by Bao Steel and a steel grade of Q345. The calculated results of the proposed design formula are smaller than those of the short column test results. Therefore, the proposed formula can be recommended as the design formula for the yield strength of rectangular cold-formed steel tubes with medium-thick wall. [ABSTRACT FROM AUTHOR]

The intelligent mine is the core driving force for the coal industry to change the way of development and to improve the quality of the industry.It is the highest form of the development of coal mine technology.Based on the development of mining technology and combined with intelligent generation system with characteristics and requirements,the concept and interconnection of the wisdom of mine are given.Based on digital mine,networking,cloud computing,big data,artificial intelligence and modern mining technology as the core technology,it will achieve the wisdom of self-learning,prediction,decision,control of the whole intelligent system.By 2025,the intelligent system will run from single system to multi-system intelligent level,the basic operating framework of wisdom production,wisdom security and wisdom guarantee system will be established.The spatial digitization,integration of information,internet,virtual equipment integration and control network will be formed initially as the goal of intelligent coal mine for the second stage.It will realize the intelligent operation of coal mine development,mining,transportation,washing,safety,ecological protection,production management and so on.The level of exploitation and utilization of resources will be greatly improved,the occupational health and working environment of coal mines will be fundamentally improved,and the ecological restoration and protection of mines will be fully implemented. [ABSTRACT FROM AUTHOR]