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实现自动化的端到端业务编排和切片编排是第五代移动通信（5G）网络的基本需求，文章针对5G传送网络北向接口开放标准化问题，分析了北向接口的功能需求，提出了北向接口的建模方案，屏蔽5G传送网络不同的技术实现方案，该建模方案为5G传送网络北向接口的统一提供了参考。

在大力发展智能电网的背景下，支撑电网运转的电力光通信网规模日趋庞大，其承载的业务更加多样化。然而电力光通信网的业务路由规划主要以最短路径算法为主，导致电力光通信网存在业务重要度分布不均衡，从而导致网络局部风险过高的问题。针对上述现状，文章采用深度强化学习技术，以网络业务风险均衡为目标，提出了基于强化学习的电力光通信网风险均衡路由算法。该算法考虑业务重要度分布情况、链路容量和链路光信噪比，实现了电力光通信网风险均衡化。文章选取某省电力通信子网验证方案的有效性，研究结果表明，该方法能够有效地降低电力光通信网风险均衡度，为电网的安全运行提供有力保障。

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science 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 Teacher Education Research is the property of Teacher Education Research 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION ENGINEERING 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 Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica 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 Continue Education Research is the property of Harbin Normal 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 Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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 Economic Science / Jingji Kexue is the property of Economic Science 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.)

Forest fire seriously threatens the healthy development of forest resources and ecosystem balance. The research on forest fire risk assessment has important theoretical value and practical significance. The construction of evaluation index system and the selection of evaluation methods in the existing evaluation research have some deficiencies. According to the disaster system theory and the representative and operable principles of index selection, this paper constructs the provincial forest fire risk evaluation system of China. Then we use the VHSD-EM method to determine the index weight, and construct the forest fire risk assessment index through the method of time weighting. The results show that the forest fire risk assessment system constructed in this paper can better reflect the risk characteristics of provincial forest fire in China, and the index content is complete. The adoption of VHSD-EM method has a good robustness and applicability which overcomes the weakness in the research of cross year risk assessment. During the investigation period, the risk of forest fire in China showed a stable trend, and the challenge of forest fire prevention and extinguishing is still severe. In contrast, Inner Mongolia, Sichuan, Shanxi, Guangxi and Shaanxi face more prominent forest fire risks. We should strengthen the prevention management of forest fire risks in areas which with serious historical disasters, and pay attention to the improvement of the technical level of managers and the investment in fire prevention. [ABSTRACT FROM AUTHOR]

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 Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica 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 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 Medical Equipment Journal is the property of Chinese Medical Equipment Journal 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 digital transformation of education is the focus of the current education reform, and it is also the development trend of education innovation in the future. The deep integration of emerging technologies and education not only brings new opportunities to the teaching profession, but also makes teachers face new challenges, which inevitably brings the risk of increased work burden to teachers. In the context of the digital transformation of education, teachers face new burden risks such as technology anxiety, technology alienation and role confusion. It is necessary to be alert to the problem of the " increased burden" on teachers brought about by digital transformation, and relieve teachers' burden from the aspects of policy guiding and supporting, improving teachers' digital literacy, making the list of teachers' burden reduction and optimizing the intelligent educational equipment. [ABSTRACT FROM AUTHOR]

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 Bulletin of Botanical Research is the property of Bulletin of Botanical Research 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.)

The experiment was conducted to study the effect of Saccharomyces cerevisiae culture on production performance, serum biochemical indexes and antioxidant indexes of lactating cows under heat stress. On the basis of original grouping of cattle farm, two groups of cows with similar average yield were selected, one group was control group (90 cows), the cows in control group were fed with basal diet, one group was test group (76 cows), the cows in test group were fed with basal diet+50 g/(head·d) of Saccharomyces cerevisiae. The test period was 30 d. The results showed that on 28 to 30 d of experiment, the milk yield of test group was significantly higher than that of control group and on 1 to 3 d of experiment (P<0.05). The SCC of milk in test group on 14~16 d was extremely lower than that in control group on 1~3 d (P<0.01). The SCC of milk in two groups was extremely lower than that on 1 to 3 d (P<0.01). Compared with control group, the content of TP, T3 and T4 in test group was extremely increased (P<0.01), and BUN content was extremely decreased (P<0.01). Compared with control group, the activity of T-SOD and GSH-Px in the test group was extremely increased (P<0.01), and the content of serum MDA in test group was extremely decreased (P<0.01). The study indicates that the culture of Saccharomyces cerevisiae can improve the intake and milk yield of cows under heat stress to a certain extent, enhance the antioxidant capacity, and alleviate the heat stress of dairy cows. [ABSTRACT FROM AUTHOR]

Copyright of Acta Prataculturae Sinica is the property of Acta Prataculturae Sinica 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 Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan 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 Geography & Geographic Information Science is the property of Geography & Geo-Information Science 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 Feed Research is the property of Editorial Board of Feed 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 China Journal of Oral & Maxillofacial Surgery is the property of Shanghai Jiao Tong University, College of Stomatology 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 Transactions of the Chinese Society of Agricultural Engineering is the property of Chinese Society of Agricultural Engineering 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 Bulletin of Botanical Research is the property of Bulletin of Botanical Research 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 Bulletin of Botanical Research is the property of Bulletin of Botanical Research 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.)

The present paper aimed to explore the expansion mechanism of Elsholtzia densa Benth., a common weed species of degraded alpine meadow and farmland ecosystem in Qinghai-Tibet Plateau. [ Method ] The community characteristics of E. densa invading patches and control patches were investigated, and the Miseq high-throughput sequencing technology combined with soil nutrient and extracellular enzyme activity determination was adopted. [ Result] The changes of community coverage and plant diversity index of E. densa invaded patches were not significant, but the total biomass decreased and leguminous plants were excluded. A total of 33 bacteria were detected from the tested soil, including 30 from rhizosphere soil and 27 from non-rhizosphere soil. Shannon-winner index, Simpson index and Chaol index are respectively 9. 22, 0. 99 and 3024. 91 in rhizosphere soil and 9. 09, 0. 99 and 2707 . 58 in non-rhizosphere soil. Actinobacteria, Proteobacteria, Bacteroidetes, Firmicutes, Acidobacteria and Gemmatimonadetes are the dominant phylum of soil bacteria. Among them, the rhizosphere soil has the highest proportion of Proteobacteria, while the non-rhizosphere soil has the highest proportion of Actinobacteria. Compared with non-rhizosphere soil, the contents of organic matter, total phosphorus, total potassium, total nitrogen, available phosphorus and available nitrogen increased significantly ( P~O. OS ), but the available potassium decreased significantly ( P~O. OS). Among them, available phosphorus increased the most, which was 6. 88 times that of non-rhizosphere soil, followed by organic matter and total nitrogen conltent. The activities of urease, sucrase, cellulase and polyphenol oxidase increased significantly ( P ~ 0. OS ), while the changes of acid phosphatase were not significant. [ Conclusion] Changing soil characteristics and bacterial diversity is one of the mechanisms of E. densa expansion. [ABSTRACT FROM AUTHOR]

Copyright of Environmental Science & Technology (10036504) is the property of Editorial Board of Environmental 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 Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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 Resources & Environment / Nongye Ziyuan yu Huanjing Xuebao is the property of Journal of Agricultural Resources & Environment 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 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 West China Journal of Stomatology is the property of Sichuan University, West China College of Stomatology 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 Agro-Environment Science is the property of Journal of Agro-Environment Science 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 Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao is the property of Chinese Journal of Applied Ecology 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.)