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极端扰动事故下，城市综合能源系统易发生大量元件同时故障的严重事故，严重威胁城市综合能源系统供能的安全性和可靠性。韧性是用于描述系统抵御扰动并快速恢复到正常运行状态的能力，因此，准确的韧性评估和有效的韧性提升措施是增强城市综合能源系统抵御供能中断能力的重要手段。在简述了城市综合能源系统韧性的定义和城市综合能源系统韧性的影响因素基础上，对目前存在的韧性评估方法、负荷恢复策略和韧性提升措施进行综述，总结了目前的研究现状，为后续城市综合能源系统的韧性评估和提升方法研究提供一定的参考。

以太网无源光网络（EPON）是未来实现宽带、多业务综合接入的重要技术手段.文章提出了一种实现EPON上行时隙分配的电路方案,完成了动态带宽分配算法（DBA）结果到接入时间的转换,同时基于"抢占"策略,实现了EPON系统的自动发现功能.

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press 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 Anhui Agricultural Sciences is the property of Journal of Anhui Agricultural Sciences 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.)

Uneven voltage, strong magnetic field and current effect can easily disturb the optimization of distribution network flexibility, The flexibility improvement effect is not obvious. In order to solve problems above, a two-stage flexibility optimization method was proposed for distribution network. Firstly, the instantaneous power balance algorithm was used to ensure the distribution network to reach the three-phase equilibrium. Secondly, the reactive power planning of the distribution network was realized through the output characteristics of reactive power output and active power loss, which effectively improved the operation quality and reduces the network loss. Finally, the two-stage optimization method that integrated diversified electric sources and loads was adopted to improve the flexibility of distribution network. In the first stage, a flexibility optimization model was built based on three indicators of flexibility and the supply characteristics of diversified electric sources and loads. In the second stage, in consideration of probability balance of distribution network flexibility indicators, the model was solved by linear transformation algorithm to complete the flexibility optimization of distribution network. Test results show that the proposed method has the advantages of small loss rate, small fluctuation curve of net load, short calculation time and flexible adaptability of distributed power access in distribution network. It can be seen that the flexibility of distribution network with distributed power supply can be effectively improved and the ability of distribution network to accept distributed power supply can be improved through flexible optimal scheduling. [ABSTRACT FROM AUTHOR]

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Copyright of Plastics Science & Technology / Suliao Ke-Ji is the property of Plastics 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.)

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报道1例在首都医科大学附属北京世纪坛医院内分泌科住院的2型糖尿病合并非酒精 性脂肪性肝炎患者，应用胰岛素强化治疗效果不佳转换为司美格鲁肽联合二甲双胍治疗，在改善糖脂 代谢的同时，改善肝脏脂肪沉积及逆转肝纤维化分级的诊疗过程。患者为 52 岁男性，因多饮、多尿 6 年，血糖控制不佳 2 年入院。患者身高 185 cm，体重 92 kg，体重指数 26.88 kg/m2 ，腰围 98 cm。糖化 血红蛋白 12.1%。入院前使用胰岛素强化降糖治疗，胰岛素用量高达 88 U/d，但空腹血糖仍高达 13~ 15 mmol/L，餐后血糖>20 mmol/L。既往有高血压病、非酒精性脂肪性肝炎病史（血清转氨酶高于正常 上限 2倍，饮酒量<30 g/d）。入院后完善相关检查，明确诊断为 2型糖尿病、2型糖尿病性周围神经病 变、2型糖尿病性肾病Ⅲ期、高血压病3级（很高危组）、高脂血症、非酒精性脂肪性肝炎、肝纤维化。治 疗上予司美格鲁肽0.25 mg、1次/周皮下注射、二甲双胍0.25 g、3次/d口服联合地特胰岛素8 U睡前皮 下注射治疗。治疗90 d后，患者糖脂代谢渐平稳达标，体重指数、腰围下降，肝功能及肝纤维化4项好 转，瞬时弹性超声成像显示肝脏脂肪沉积减少、肝纤维化分期改善，且无明显胃肠道反应，无低血糖 发生。 [ABSTRACT FROM AUTHOR]

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Objective To demonstrate the major components and molecular mechanism of Shenling Baizhu San in treating primary osteoporosis by using LC-MS and single-cell RNA sequencing analysis. Methods LC-MS technology was used to identify the components of Shenling Baizhu San and its targets were predicted. The transcriptome and scRNA data related to POP were obtained, the differentially expressed genes (DEGs) and cell subpopulations were analyzed, and weighted gene co-expression network analysis (WGCNA) was further performed on DEGs to obtain the hub genes and construct PPI network. Finally, virtual molecular docking was used to verify the components and core targets. Results After LC-MS identification and screening, 10 components and 414 potential targets were obtained. Differential and WGCNA analysis respectively obtained 843 POP-DEGs and 1976 hub targets, and 19 core targets were obtained. Single-cell sequencing analysis found that Macrophage, Monocyte, T cells, B cellexisted in POP sample. The enrichment results showed that the core targets were involved in cellular senescence, osteoclast differentiation, MAPK signaling pathway. Finally, the virtual molecular docking results showed that the identified components could form a stable docking with the POP core targets. Conclusion Shenling Baizhu San can regulate cell senescence, immune function and osteoclastic differentiation through multiple components, multiple targets, multiple cells and multiple pathways to treat POP. [ABSTRACT FROM AUTHOR]

Copyright of Fishery Modernization is the property of Fishery Modernization 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.)

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Copyright of Journal of Natural Disasters 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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The YTH domain containing 2 (YTHDC2)protein, a methyl-binding protein of -methyladenosine (m"A), recognizes and binds mbA modifications to mediate the biological functions of mbA modifications. As mbA modifications are widely found on various RNAs, the biological functions of YTHDC2 in combination with distinct kinds of RNAs are also different. Emerging studies have shown that YTHDC2 is involved in the occurrence and development of lung, gastric, ovarian and other carcinomas through binding to mbA modifications. Binding can then yield a pro- or anti-cancer effect, which is significantly associated with the prognosis of various tumors. This paper summarizes the role and specific mechanisms of YTHDC2 in tumors to provide a reference basis for exploring the prevention, diagnosis and treatment of different tumors from the perspective of YTHDC2. [ABSTRACT FROM AUTHOR]

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