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钢-混凝土组合结构兼具钢筋混凝土结构与钢结构的共同优点，具有承载力高、刚度大、延性和抗震性能好及节约材料等优点，符合土木工程的发展方向。处于复杂受力状态下的梁-柱节点区域是建筑结构中需要特别关注的部位，既是整体结构安全性和可靠性的重要基础，又是建筑结构抗震设计中的薄弱环节，因此节点部位的设计至关重要。在综合介绍钢管混凝土柱、型钢混凝土柱及钢柱与钢筋混凝土梁的连接节点研究背景的基础上，分析了上述节点连接的构造形式及受力性能等方面的研究现状，指出了该类节点连接方式及受力性能方面有待进一步解决的问题，为该领域的深入研究及该类节点连接的设计提供参考。

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Copyright of Journal of South China Agricultural University is the property of Gai Kan Bian Wei Hui 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 Electric Machines & Control / Dianji Yu Kongzhi Xuebao is the property of Electric Machines & Control 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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The Shiwuliqiao Area is located in the southeastern part of the Mohe foreland basin in the northern Greater Khingan Mountains. It is a typical forest swamp shallow-covered area, making it difficult to directly obtain geological information. Based on the comprehensive interpretation of 1:50 000 magnetic survey data, combined with geological, mineralization, and geochemical prospecting information, a regional metallogenic prediction model is established to delineate metallogenic prediction areas. This provides necessary small-scale geophysical information for mineral prospecting in the Shiwuliqiao Area. The comprehensive analysis indicates that different geological units in the Shiwuliqiao Area exhibit distinct magnetic field characteristics. Volcanic rock strata show high magnetic susceptibility and residual magnetic field intensity, followed by early Cretaceous intrusive rocks, while sedimentary rock strata show low magnetic susceptibility and residual magnetic field intensity. The high magnetic anomaly gradient zone is considered favorable for mineralization, with magnetic anomaly values ranging from 20 to 80 nT in sedimentary rock areas, and 120 to 180 nT in voleanic rock areas. 3 areas are delineated as level II metallogenic prediction zones, and 5 areas as level III metallogenic prediction zones. Among them, level II metallogenic prediction zones have favorable mineralization geological conditions, high comprehensive information intensity, and great prospecting potental. [ABSTRACT FROM AUTHOR]

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Copyright of Automotive Engineer (1674-6546) is the property of Auto Engineering 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.)

The gully control and land consolidation project is a major ecological environment management project implemented by Yan'an City for increasing the area of cultivated land, ensuring food security, and protecting the ecological environment. A study on the change of land use and ecosystem service value in Yan'an City underlying this project has important implications for scientific assessment of ecological benefits of this project as well as ecological protection and high quality development of the Loess Plateau. Based on the Landsat TM/OLI images in 2010 and 2018, the unit area value equivalent factor method was employed to quantitatively analyze the variation of land use and ecosystem service value in Yan'an City from 2010 to 2018. Results showed that the land use types in Yan'an City mainly included grassland, forest land, and cultivated land. During the study period, the land use types remained relatively stable with limited interchangeable transformation among cultivated land, forest land, and grassland. The ecosystem service value of Yan'an City increased by 0.28% from 95.591 billion yuan in 2010 to 95.856 billion yuan in 2018. Grassland and forest land were the key factors contributing to ecosystem service value. Sparse forest land, high covered grassland and water area were the main contributing factors and sensitive factors of ecosystem service value change. The regulation service was the most important of all the ecosystem service functions in Yan'an City, among which the climate regulation had the greatest value. The range of variation for the value of each ecosystem service was <1%. [ABSTRACT FROM AUTHOR]

With consumerism prevailing in modern cities, their uniqueness and diversity is gradually disappearing. People no longer pay attention to place significance and traditional values. Therefore, the "place" has become a meaningless activity space, which attracted the attention of several disciplines. However, at present, there are few studies on microgeographic units' delocalization from multiple dimensions, and there is a lack of discussion on the relationships between individual attributes such as emotion, social interaction, and consumption with placelessness. Based on the theoretical framework of placelessness, this study analyzed the process and dynamic mechanism of the evolution of the Heyuan Hakka restaurant into a placeless landscape from a micro perspective. The study showed that: 1) The synergy of power, capital, consumption, and operators contributes to the delocalization of restaurants. The government allocates resources through administrative means, such as administrative division adjustment, planning, and system reform, and begins the reconstruction and commercialization of urban space, which is the external driving force for the evolution of local restaurants. 2) In the course of urban development, local restaurants prefer to operate in new urban commercial centers, and they are gradually moving from older towns to achieve higher commercial efficiency. Therefore, the place significance implicit in the location of a restaurant gradually disappears. 3) To meet the needs of modern food consumption, capital has driven the development of restaurant chains and the integration of food across regions, which has inevitably led to the development of more homogeneous restaurants. 4) Operators believe that higher efficiency leads to higher profitability, so they are increasing their focus on the spatial efficiency of their restaurants. Competition for restaurant locations, environmental construction, and chain expansion reflect space production practices. 5) Local restaurants that gradually gather in the urban business center and surrounding areas alienate their relationship with residents, who find it difficult to engage in daily, frequent, social activities and emotional exchanges in such places. 6) Residents' original intimacy toward local restaurants has disappeared, and it has become difficult to establish a stable emotional connection with the new food consumption space. The main contributions of this study are as follows: First, at the micro level, the study explored how the power of modernity has contributed to the development of placelessness in three dimensions and expanded the study of consumption based on the 'human-object-land' relationship. Therefore, this study responds to the consumption research tendency of the new cultural geography based on the behavior, place, material, and the social-cultural mechanism behind it. Second, a processual analysis of the evolution of place into non-place, revealing the interaction between place and socioeconomic culture in the process of its construction, was completed. Third, this study prompts local restaurant operators to think deeply about their traditions and development processes, guiding operators to reestablish the connections between local restaurants and their communities, which will enhance the social value of local restaurants. Finally, this study enriches place theory, which will promote consumption space development. As a manifestation and consumption space of local culture, local restaurants should allow residents, tourists, and other consumers to experience the unique local culture of their region. This study also has value for the construction of urban consumption space. [ABSTRACT FROM AUTHOR]

Copyright of Laser Technology is the property of Gai Kan Bian Wei Hui 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 Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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 Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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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An automatic measurement system for the volt-ampere characteristics of solar cells was designed by using embedded technology and computer technology. The system can automatically change the load resistance value, and use the voltage and current sensors to collect the voltage and current data under different load resistance values. The data are sent to the computer through the serial port. A data processing software is designed by using MATLAB in the computer. The software automatically draws the volt-ampere characteristic curve of solar cells after processing the received data, and gives the relevant parameters. At the same time, the data and results are saved in the form of files for subsequent processing. The experimental results show that the system can complete the automatic measurement of the parameters related to the volt-ampere characteristics of solar cells and the automatic plotting of the curves. The system is simple and convenient to operate, reduces human participation, and the measurement results are accurate. [ABSTRACT FROM AUTHOR]

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