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文章从光载无线通信（ROF）的基本原理出发,提出了ROF在未来无线宽带移动通信中的多种应用方式,包括ROF技术在多体制无线接入重载中的应用以及ROF在无线移动网络中实现基站与光网络节点设备的互联等。总结了ROF的技术优势,提出了有待解决的关键技术问题。

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 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 Chinese Journal of Oncology is the property of Chinese Journal of Oncology / Zhonghua Zhongliu Zazhi 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 Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She 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 Southeast University / Dongnan Daxue Xuebao is the property of Journal of Southeast 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 Chinese Journal of Arteriosclerosis is the property of Chinese Journal of Arteriosclerosis 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.)

Objective To explore the vitamin D nutritional status and influencing factors of primary and middle school students in poverty areas of Guizhou Province, and to provide scientific basis for the development of targeted nutritional improvement measures. Methods A total of 2,519 students from 4 primary and4 middle schools in 9 key monitoring counties (districts) in Guizhou Province, where the Nutrition Improvement Program for Rural Compulsory Education Students was implemented in 2023, were selected for questionnaire surveys, physical examinations, and blood biochemistry tests using multistage cluster sampling methods. Multifactorial logistic regression was used to analyze the current status of vitamin D nutrition and its influencing factors. Results The average vitamin D level of primary and middle school students in poverty areas of Guizhou Province was (22. 59 ± 6. 66) ng/ml, and the rate of low vitamin D was 37. 51%. The prevalence of low vitamin D among female students (46. 17%) was higher than that of male students (29. 11%), and the difference was statistically significant 仗2 = 78. 213, P < 0. 001). There was a significant difference in the rate of low vitamin D among students in different regions 仗2 二 23. 454, P <0. 001), and the rate of low vitamin D tended to increase with age = 44. 905, P <0. 001). The results of multifactorial logistic regression analysis showed that, compared with the corresponding reference group, ethnic minorities (OR = 0. 706, 95% CI: 0. 590 - 0. 844), physical activity M60 min/d (OR = 0. 791, 95% CI: 0. 663 - 0. 943), and living in the countryside (OR - 0. 747, 95% CI: 0. 616 -0.906) were protective factors for low vitamin D levels; obesity (OR =2. 133, 95% C/: 1.390 - 3.272), female students (OR 二2. 238, 95% CI: 1.882 -2.662), the 11-13 years old group (OR =1. 849, 95% CI: 1. 521 - 2. 248) and the 14 - 17 years old group (OR = 2. 000, 95% CI: 1. 576 - 2. 539) were risk factors for low vitamin D levels. Conclusion High rates of low vitamin D among primary and middle school students in poverty areas of Guizhou Province require the development of personalized nutritional interventions to improve vitamin D nutritional status. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Cryptologic Research (2097-4116) is the property of Editorial Board of Journal of Cryptologic Research 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 Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board 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 achieve the safety of autonomous driving, it is crucial to accurately detect traffic signs. Addressing the issue of low accuracy in traditional methods for traffic sign detection, a modified YOLOv5 algorithm incorporating the RepVGG module for traffic sign recognition was proposed. Firstly, by replacing certain CBS modules in the original algorithm with the RepVGG module, the feature extraction capability was enhanced. Additionally, the channel block attention module(CBAM) attention mechanism was introduced in the feature fusion module to strengthen the detection model's resistance to interference. Finally, during network training, the efficient-IoU(EIoU) loss function was utilized to achieve more precise target positioning, thereby improving the algorithm's detection accuracy and iteration speed. Experimental results demonstrate that the improved YOLOv5 algorithm exhibits faster iteration speed. On the CCTSDB traffic sign dataset, it achieves improvements of 4. 99% in accuracy, 3. 62% in recall rate, and 1. 73% in average accuracy compared to the original YOLOv5 algorithm, making it more suitable for practical applications. [ABSTRACT FROM AUTHOR]

Copyright of Journal of East China University of Science & Technology is the property of Journal of East China University of Science & Technology 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.)

Objective: To explore the changes in levels of angiogenic T lymphocyte (Tang)in the peripheral blood of rats exposed to chronic intermittent hypoxia (CIH)during early atherosclerotic vascular changes. Methods: Healthy adult Sprague Dawley (SD)rats were randomly divided into two groups: the normal feeding group (RA group)and the chronic intermittent hypoxia group (IH group), with the IH exposed to intermittent hypoxia for 8 h per day for a total of 6 weeks. The intermittent hypoxia pattern was set to repeat every 2 min, with 40 s of nitrogen gas to reduce the oxygen concentration from 21% to 8% and stabilize for 20 s, followed by normal air to restore the oxygen concentration to 21% for 40 s and maintain for 20 s. After modeling, levels of Tang and endothelial progenitor cells (EPC)were measured by flow cytometry. Levels of high⁃density lipoprotein cholesterol (HDL⁃C), low⁃density lipoprotein cholesterol (LDL ⁃C), triglycerides (TG), total cholesterol (TC), and homocysteine (Hcy)were measured by ELISA. pathological changes were observed in HE stained pathological sections of the thoracic aorta. Results: Flow cytometry results showed that compared to the RA group, the levels of Tang in rats of the IH group were significantly elevated [ (22.975±1.866)% vs. (15.713±1.746)%, P < 0.001], and there was no statistical difference in EPC levels [ (0.040±0.028)% vs. (0.028±0.012)%, P > 0.05]；H E staining results showed that the IMT of rats thoracic aorta in the IH group was significantly increased compared to the RA group [ (121.275 ± 30.896)μm vs. (84.075±7.452)μm, P < 0.05]；ELISA results showed that the Hcy level in the IH group was significantly higher compared to the RA group [ (6.2±0.6)μmol/L vs (. 5.5±0.6)μmol/L, P < 0.05], but there were no statistical differences in HDL ⁃C, LDL ⁃C, TC, and TG levels. Conclusion: Early atherosclerosis occurs in the blood vessels of CIH rats and the levels of Tang elevated, suggesting that the level of Tang is related to the occurrence and development of early atherosclerosis. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Sichuan University (Medical Science Edition) is the property of Editorial Board of Journal of Sichuan University (Medical 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 Southwest China Journal of Agricultural Sciences is the property of Editorial Department of Southwest China Journal 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 Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Automotive Digest is the property of Automotive Digest 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 New Architecture is the property of New Architecture 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 Northern Agriculture / Beifang Nongye Xuebao is the property of Journal of Northern Agriculture Editorial 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.)

Integrated Research on Disaster Risk (IRDR) Program is a 10-year international science program initiated by International Council of Scientific Unions (ICSU), International Social Sciences Council (ISSC), and United Nations Office International Strategy for Disaster Reduction (UNISDR). In 2009, International Programme Office (IPO) of IRDR Program successfully applied by China Association for Science and Technology in Beijing, became the first office of ICSU Interdisciplinary Body hosted in Asia. IRDR Program has been implemented for ten years, and it has become the flagship program for global integrated research on disaster risk, established an extensive global disaster risk comprehensive research network, and formed an effective international science program management mechanism. Four major achievements have been achieved through ten years: (1) successfully implemented the international science program of the ICSU for the first time; (2) operated for ten years to ensure the successful implementation of the program; (3) improved the level of technology governance on global disaster risk; (4) facilitated the establishment of the IRDR Phase II New Decade Plan. The platform has been utilized to learn advanced international concepts, to contribute Chinese wisdom and strength, to provide China's experience in organizing the international science program, and to make important contributions to global integrated disaster risk reduction. [ABSTRACT FROM AUTHOR]

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Copyright of Modern Preventive Medicine is the property of Modern Preventive Medicine 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.)

Digital technology can promote the sustainable development of countries and regions along the route of Belt and Road Initiative and help enhance interconnectivity in technology, standards, rules, and digital infrastructure. Science and technology play a crucial role in the construction of the Digital Belt and Road. However, currently, some countries and regions along the route of Belt and Road Initiative lack sufficient digital infrastructure, and there is a shortage of critical core digital technology and challenges in its promotion. It is essential to build an innovative ecosystem for the Digital Belt and Road that includes facilities, technology, mechanisms, and capabilities to promote the sustainable development. This study analyzes the current status and major challenges of the construction of the Digital Belt and Road, proposes the development direction, and puts forward relevant policy suggestions to provide decision-making reference for the construction of the Belt and Road Initiative. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She 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 Journal of Xinyang Normal University Natural Science Edition is the property of Journal of Xinyang Normal 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 Xinyang Normal University Natural Science Edition is the property of Journal of Xinyang Normal 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 Experimental Technology & Management is the property of Experimental Technology & Management 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.)

To promote economic development, social progress, and scientific and technological innovation, it is necessary to strengthen scientific cooperation and information sharing. Open data has emerged in response and become a seemingly inevitable development in the evolution of digital technology. Open data, however, must be supported by infrastructure composed of physical entities and virtual systems that meet the needs of data applications in many fields. Constructing and strengthening open data infrastructure should therefore be considered important objectives of information technology development. This study analyzes the elements of open data infrastructure and expounds its significant positive role in implementing open science. Based on an analysis of the current state and substantial development of China's open data infrastructure, this study puts forward relevant measures and suggestions in view of the shortcomings and challenges China has faced with its open data infrastructure. [ABSTRACT FROM AUTHOR]

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu 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 Tourism Tribune / Lvyou Xuekan is the property of Tourism Institute of Beijing Union 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.)

Copyright of Forensic Science & Technology is the property of Institute of Forensic Science, Ministry of Public Security 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 Evaluation & Analysis of Drug-Use in Hospitals of China is the property of Evaluation & Analysis of Drug-Use in Hospitals of China Editorial Board 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 Northwest A & F University - Natural Science Edition is the property of Editorial Department of Journal of Northwest A&F University (Natural Science Edition) 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 Food Safety & Quality is the property of Journal of Food Safety & Quality 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 Journal of Silk is the property of Zhejiang Sci-Tech University Magazines 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 graphite felt was modified by electrochemical polymerization of pyrrole ・ The effects of polymerization pulse time, pulse number and pulse interval time on the morphology and electrochemical properties of polypyrrole-coated graphite felt were investigated・ The results show that the polypyrrole coating can be tuned by the polymerization pulse time, pulse number and pulse interval time. The coating of polypyrrole can also improve the hydrophilicity and 2-electron oxygen reduction activity of the carbon fiber. The optimal electrochemical polymerization conditions are the polymerization pulse time of 100 s, the interval of 120 s and 10 pulses・ The maximum specific electrochemical activitg surface area reachs 1.502 8 cm2/cm3 ・ In the sodium sulfate solution with pH = 3, a H2O2 production rate of 25. 775 mol/(m3 • h) was achieved, which is about 3・ 17 times of that of the unmodified graphite felt electrode. [ABSTRACT FROM AUTHOR]

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 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 China Surfactant Detergent & Cosmetics is the property of China Surfactant Detergent & Cosmetics 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 Agricultural Big Data is the property of Journal of Agricultural Big Data 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 Modern Laboratory Medicine is the property of Journal of Modern Laboratory Medicine 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 Automotive Digest is the property of Automotive Digest 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.)