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为研究组合楼板作为承载构件时在压型钢板局部削弱后的受弯性能，对压型钢板的竖直与水平方向进行不同程度的弱化，并在弱化后对钢板进行无侧向约束的受弯试验，研究压型钢板削弱后的受弯性能及其破坏形式。试验结果表明：在均布荷载作用下，各组压型钢板的破坏均以跨中受弯屈曲破坏为主；水平方向洞口削弱了钢板上翼缘承载力，当水平洞口半径为20 mm时，试件抗弯承载力降低约15%；竖向洞口会阻碍钢板上、下翼缘应力的传递，当竖向洞口半径为25 mm时，试件抗弯承载力降低约10%。通过对比可知，水平方向的弱化对承载力的影响相较于竖直方向要更加明显。

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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BACKGROUND: Ossification of the ligamentum flavum was previously considered to be rare in the population. As research has progressed, its incidence rate is increasing gradually, which has aroused the interest of a large number of researchers. OBJECTIVE: To visualize and analyze the research results on ossification of the ligamentum flavum from the Web of Science Core Collection since 1999 using bibliometric methods, and to review the research history of ossification of the ligamentum flavum, highlighting important literature, summarizing research hotspots, and providing ideas for researchers to find research directions. METHODS: Using the Web of Science Core Collection as the data source, relevant papers on ossification of the ligamentum flavum were searched and screened. VOSviewer 1.6.19 and CiteSpace 6.2.R6 were used to conduct the visual analysis of annual publication volume, research countries, institutions, citations, journals, authors, and keywords. RESULTS AND CONCLUSION: (1) A total of 347 papers were included. Since 1999, the number of published papers has increased in a spiral pattern. China’s research started later than Japan’s, but the number of publications has come up later, with Peking University being the institution with the most publications, and Prof. Chen Zhongqiang from Peking University being the scholar with the most publications. (2) Five of the 10 most frequently cited publications were related to the surgical treatment of the disease. (3) Excluding keywords directly related to the research topic and synthetically analyzing frequencies and betweenness centralities of key words, terms such as “thoracic myelopathy,” “dural ossification,” “minimally invasive surgery,” and “ossification of the posterior longitudinal ligament” occupied a central position in this field. (4) Keywords clustering analysis showed that clinical manifestations and surgical treatment of ossification of the ligamentum flavum accounted for a large proportion of study. (5) The timeline and burst analysis of keywords revealed that “minimally invasive surgery” appeared as a keyword around 2015, with the highest burst strength and the latest burst start time, and began to receive extensive attention from researchers in 2019. The burst of the keyword “dural ossification” has not yet ended. (6) Surgical treatment for ossification of the ligamentum flavum has been at the forefront of research. Development and research of minimally invasive surgery and research on dural ossification secondary to ossification of the ligamentum flavum are both current research hotspots and possible future research trends. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Xi'an Jiaotong University is the property of Editorial Office of Journal of Xi'an Jiaotong University 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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In alignment with General Secretary Xi Jinping’s directives from the postgraduate education conference, the course “Practical Instrumental Analysis Theory” aims to embody a comprehensive and holistic approach to student development. Specifically, the ideological and political elements, such as the integration of theory and practice, the cultivation of a meticulous scholarly attitude, and the nurturing of national pride, are deeply integrated into its pedagogical framework. Through a cyclical process of practical application, feedback and promotion within the teaching methodology, we subtly infuse the ideals and convictions crucial to postgraduate education into our knowledge dissemination approach. [ABSTRACT FROM AUTHOR]

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In order to investigate the influence law ol dilierent (actors on the quantitative transformation ol a-Ab 0$ during calcination and its mechanism, and to determine the optimal preparation conditions for the preparation ol specific a-Al2O3 content, 4：N grade aluminum hydroxide was calcined under dilierent temperatures, heating rates, and holding times. The calcined samples were analyzed qualitatively and quantitatively, and the optimization model was established via response surface analysis and verified experimentally. The results show that calcination temperature and holding time are the main factors allecting the quantitative transformation ol crAh 0$ during the phase change ol alumina, and the content ol a-AI2 0$ rises with the increase ol calcination temperature and holding time. Under the range ol calcination temperature ol 1 130 1 170 "C, heating rate ol 1 5 °C/min, and holding time ol 1 3 h, a~ AI2O3 content value is used as the response variable to establish a model and set it respectively Al2 O3 content values were 0. 75, 0. 85, and 0.95 lor validation, and the corresponding optimal calcination temperatures were 1 155.53, 1 169.14, and 1 169.54 °C, respectively. The heating rates were 4.97, 4.94, and 4.95 °C/min, respectively・ The holding time was 2. 97, 2, 41 and 2. 67 h, respectively. The dillerence between the predicted results ol the established model and the experimental results was less than 8 %, indicating that the established model was effective. [ABSTRACT FROM AUTHOR]

In view of the problem of vehicle electromagnetic interference caused by electric drive system, an Electromagnetic Interference (EMI) prediction model of the electric drive system is established using precise modeling method of modules. The model consists of the high-frequency equivalent circuit model of the motor and the inverter model. Based on vector-fitting method, the motor impedance amplitude-frequency curve is fitted, and a high-frequency equivalent circuit model of the motor is established. In the inverter model, the influence of the parasitic parameters between IGBT and radiator on the system EMI is considered. The common mode interference voltage of the electric drive system is predicted using the established EMI model. The results show that the error between the simulated and measured results is less than 10 dB in the range of 0.1~100 MHz. [ABSTRACT FROM AUTHOR]

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报道1例在天津中医药大学第二附属医院就诊的急性心肌梗死合并2型糖尿病患者使 用司美格鲁肽治疗获得良好降糖及心血管效益的诊疗过程并进行文献复习。患者为34岁男性，主因 “间断心前区疼痛3 d，加重13 h”入院，入院后行急诊经皮冠脉介入术，术后住院治疗期间完善各项检 查，确诊为2型糖尿病。进行标准的急性冠脉综合征治疗方案同时，予地特胰岛素联合苯甲酸阿格列 汀片、盐酸二甲双胍片口服降糖治疗，但始终控制不佳，考虑患者合并高危心血管风险，逐步更改用药 方案为胰高糖素样肽‐1受体激动剂周制剂司美格鲁肽联合盐酸二甲双胍片，取得良好的降糖和心血 管效益。司美格鲁肽降糖效果持久、平稳，患者依从性高，还具有显著的心血管效益，可用于糖尿病合 并心血管疾病的患者。 [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.)

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.)

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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