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基于优先使用权的温贮备可修重试系统可靠性与期望成本模型

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控制与决策 2024年第4期39卷 1351-1360页

作者：康佳胡林敏王妍燕山大学理学院河北秦皇岛066004

针对具有两种不同类型部件的温贮备可修系统,基于优先使用权规则,将部件的重试特性和不可靠修理设备引入系统,建立一种新的系统可靠性和成本模型.失效部件由一个不可靠修理设备维修,当正常的修理设备维修失效部件时会发生不完全故障,此... 详细信息

针对具有两种不同类型部件的温贮备可修系统,基于优先使用权规则,将部件的重试特性和不可靠修理设备引入系统,建立一种新的系统可靠性和成本模型.失效部件由一个不可靠修理设备维修,当正常的修理设备维修失效部件时会发生不完全故障,此时,它或以一定的概率立即被维修,或以一定的概率继续低效维修失效部件.在不完全故障下,修理设备有可能发生完全性故障,完全性故障后会立即被维修.鉴于维修环境的随机波动性,利用PH分布对修理设备的修理时间进行建模,这在一定程度上拓展了模型的适用性.通过概率讨论得到稳态下系统的一些主要性能指标,构建单位时间的总期望成本函数,并就总期望成本关于各参数的敏感性进行分析.通过数值实例展示系统参数对系统稳态性能指标和系统成本的影响,为系统可靠性设计者和决策者提供理论支撑和参考.

关键词：重试不可靠修理设备 PH分布稳态指标期望成本

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可拉伸高分子光电器件的研究进展

高分子学报 2024年第9期55卷 1091-1110页

作者：王思怡钟文楷黄飞华南理工大学高分子光电材料与器件研究所发光材料与器件国家重点实验室

可拉伸高分子光电器件是一类基于共轭高分子的独特器件，具备在承受机械应变时仍能维持其光电性能的能力，在可穿戴电子、可拉伸显示、生物医学传感等领域展现出广阔的应用潜力.近年来，国内外学者对器件与材料设计进行了大量的探索，... 详细信息

可拉伸高分子光电器件是一类基于共轭高分子的独特器件，具备在承受机械应变时仍能维持其光电性能的能力，在可穿戴电子、可拉伸显示、生物医学传感等领域展现出广阔的应用潜力.近年来，国内外学者对器件与材料设计进行了大量的探索，为其性能提升和应用拓展奠定了坚实基础.本文以外在弹性与本征弹性2个维度为切入点，深入探讨器件形态设计、材料结构调控以及薄膜组分优化等策略，总结并评述其重要成果.最后，指出未来需要关注的重点研究方向，以克服商业化过程中面临的多重挑战，并展望可拉伸高分子器件的不断进步能为有机电子领域注入新的活力.

关键词：共轭聚合物可拉伸有机场效应晶体管有机发光二极管有机光探测器

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THE PROPER PARAMETRIZATION OF A SPECIAL CLASS OF RATIONAL PARAMETRIC EQUATIONS

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Journal of Systems Science & Complexity 2006年第3期19卷 331-339页

作者： jia LI Xiaoshan gao Key Laboratory of Mathematics Mechanization Institute of Systems Science Academy of Mathematics and Systems Science Academy of Sciences Beijing 100080 China.

We give a proper reparametrization theorem for a set of rational parametric equations which is proper for all but one of its parameters. We also give an algorithm to determine whether a set of rational parametric equa... 详细信息

关键词： Proper reparametrization rational parametric equations CS method.

Iodine Nutrition, Thyroid-stimulating Hormone, and Related Factors of Postpartum Women from three Different Areas in China: A Cross-sectional Survey

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Biomedical and Environmental Sciences 2024年第3期37卷 254-265页

作者： SHAN Xiao Yun ZOU Yan HUANG Li Chun jiaNG Shan ZHOU Wei Wen QIN Qiu Lan LIU Chang Qing LUO Xiao Yan LU jia Xi MAO De Qian LI Min YANG Zhen Yu YANG Li Chen Key Laboratory of Trace Element Nutrition of National Health Committee National Institute for Nutrition and HealthChinese Center for Disease Control and PreventionBeijing 100050China Hunan Key Laboratory of Typical Environmental Pollution and Health Hazards School of Public HealthHengyang Medical SchoolUniversity of South ChinaHengyang 241001HunanChina Zhejiang Provincial Center for Disease Prevention and Control Hangzhou 310051ZhejiangChina Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention Nanning 530028GuangxiChina Hebei Provincial Center for Disease Control and Prevention Shijiazhuang 050021HebeiChina

Objective Studies on the relationship between iodine,vitamin A(VA),and vitamin D(VD)and thyroid function are *** study aimed to analyze iodine and thyroid-stimulating hormone(TSH)status and their possible relationships with VA,VD,and other factors in postpartum *** A total of 1,311 mothers(896 lactating and 415 non-lactating)from Hebei,Zhejiang,and Guangxi provinces were included in this *** urinary iodine concentration(UIC),TSH,VA,and VD were *** The median UIC of total and lactating participants were 142.00µg/L and 139.95µg/L,*** median TSH,VA,and VD levels in all the participants were 1.89 mIU/L,0.44μg/mL,and 24.04 ng/mL,*** differences in the UIC were found between lactating and non-lactating *** and TSH levels were significantly different among the three *** rural UIC was higher than the urban *** mothers had a higher UIC and a higher prevalence of excessive *** UICs and TSHs levels were observed in both the VD deficiency and insufficiency groups than in the VD-sufficient *** adjustment,no linear correlation was observed between UIC and VA/*** interaction was found between vitamins A/D and UIC on TSH *** The mothers in the present study had no iodine ***,area type,BMI,and VD may be related to the iodine status or TSH levels.

关键词： Median urinary iodine concentration Thyroid-stimulating hormone Vitamin A Vitamin D Postpartum women

Facile preparation of Nb_(2)O_(5) microspheres and their excellent electrochemical performance in aqueous zinc-ion hybrid supercapacitors

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Rare Metals 2022年第9期41卷 3129-3141页

作者： si-jia Zhang Han Chen Yi-Xue Xu Chang-Sheng An Kai-Xiong Xiang School of Materials and Advanced Manufacturing Liling Ceramic InstituteHunan University of TechnologyZhuzhou412007China Hunan Institute of Science and Technology Yueyang414000China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha410022China

The aqueous solution-based zinc-ion hybrid supercapacitors(ZHSCs)have attracted immense attention as they are characterized by high power and energy *** materials with high performance should be developed for ZHSCs to resolve power imbalances between capacitor-and battery-type electrode *** address this issue,Nb_(2)O_(5) microspheres(with the structure like sweet dumplings with exposed stuffing)were produced following a hydrothermal process which was followed by a high-temperature calcination *** specific capacity of the as-synthesized Nb_(2)O_(5) microspheres was up to 324 F·g^(-1) when the current density was 0.1 A·g^(-1),and the long-term capacity retention was 85%at the end of 5000 *** results revealed that the nanospheres could be used as battery-type electrode materials for the fabrication of ***_(2)O_(5)//AC ZHSCs were fabricated with Nb_(2)O_(5) microspheres as the negative electrode materials,and activated carbon(AC)was used as the positive electrode *** a result,a specific capacity of 108 F·g^(-1) was achieved when the current density was 0.1 A·g^(-1).The power density was high(8020 W·kg^(-1))at 28 Wh·kg^(-1),and the energy density was high(60 Wh·kg^(-1))at 100 W·kg^(-1).The structurally novel Nb_(2)O_(5) microspheres can be potentially used for the development of the next-generation ZHSCs that exhibit excellent performance.

关键词： Hydrothermal Microspheres Nb_(2)O_(5) Zincion hybrid supercapacitors(ZHSCs) Fast kinetics

主动健康视角下上海市55岁以上人群轻度认知障碍疾病认知及就诊意愿研究

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中国全科医学 2024年第10期27卷 1208-1214页

作者：张敏陆媛高松马佳刘亚林翟佳燚于德华同济大学附属杨浦医院全科医学科上海市200090 同济大学医学院全科医学系上海市200090 上海市全科医学与社区卫生发展研究中心 200090 上海市杨浦区定海社区卫生服务中心 200090 上海市嘉定区嘉定镇街道社区卫生服务中心 201899

背景主动健康是实施健康中国战略的重要措施。轻度认知障碍(MCI)是认知障碍疾病早期发现和干预的重要切入点,是实现脑健康的关键环节。目的了解上海市55岁以上社区人群对MCI的认知情况、就诊意愿及影响因素,调动人群对MCI的主动健康干预... 详细信息

背景主动健康是实施健康中国战略的重要措施。轻度认知障碍(MCI)是认知障碍疾病早期发现和干预的重要切入点,是实现脑健康的关键环节。目的了解上海市55岁以上社区人群对MCI的认知情况、就诊意愿及影响因素,调动人群对MCI的主动健康干预,全面实现健康中国建设。方法2021年10—12月,随机抽取上海市城区、郊区各一区(城区为杨浦区、郊区为嘉定区),每区随机抽取1~2家社区卫生服务中心(杨浦区为大桥社区卫生服务中心、定海社区卫生服务中心,嘉定区为嘉定镇街道社区卫生服务中心),按纳入标准对社区卫生服务中心门诊候诊居民进行现场面对面问卷调查。MCI疾病认知度调查问卷内容包括:(1)一般人口学特征;(2)社区人群MCI疾病认知水平;(3)社区人群疾病就诊意愿。采用Logistic回归分析探讨社区人群MCI就诊意愿的影响因素。结果本调查共发放问卷970份,回收有效问卷951份,有效回收率98.04%。(1)55岁以上社区人群对MCI的认知问卷得分为(14.55±5.24)分。51.3%(488/951)的社区人群知晓“轻度认知障碍”的概念,获知途径以媒体途径为主[61.7%,301/488];59.9%(570/951)的人群认为“年纪大了都会出现轻度认知障碍”;14.1%(134/951)的人群参加过相关筛查活动;6.2%(59/951)的人群曾因记忆障碍或怀疑有认知障碍而就诊。(2)对社区人群的MCI就诊意愿进行单因素及多因素分析发现,认知障碍家族史、对MCI的认识与理解及个人相关经历是社区人群MCI就诊意愿的影响因素(P<0.05)。结论55岁以上社区人群MCI疾病认知水平较差,疾病就诊意愿不强烈。MCI相关知识知晓不佳、对MCI的理解存在偏差及相关实践经历缺乏的人群就诊意愿差。建议多角度宣传,提高社区人群MCI疾病认知度;提供全方位支持,提高主动健康可及性,探索促进主动健康的有效途径。

关键词：认知障碍主动健康健康中国轻度认知障碍疾病认知就诊意愿影响因素分析

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N-acetylserotonin alleviates retinal ischemia-reperfusion injury via HMGB1/RAGE/NF-κB pathway in rats

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 228-238页

作者： Yu-Ze Zhao Xue-Ning Zhang Yi Yin Pei-Lun Xiao Meng gao Lu-Ming Zhang Shuan-Hu Zhou Shu-Na Yu Xiao-Li Wang Yan-Song Zhao Department of Ophthalmology Affiliated Hospital of Weifang Medical UniversityWeifang 261031Shandong ProvinceChina School of Medical Imaging Weifang Medical UniversityWeifang 261053Shandong ProvinceChina Department of Anatomy Weifang Medical UniversityWeifang 261053Shandong ProvinceChina Departments of Orthopedic Surgery Brigham and Women’s HospitalHarvard Medical SchoolBostonMA 02115USA

AIM:To observe the effects of N-acetylserotonin(NAS)administration on retinal ischemia-reperfusion(RIR)injury in rats and explore the underlying mechanisms involving the high mobility group box 1(HMGB1)/receptor for advanced glycation end-products(RAGE)/nuclear factor-kappa B(NF-κB)signaling ***:A rat model of RIR was developed by increasing the pressure of the anterior chamber of the *** male Sprague Dawley were randomly divided into five groups:sham group(n=8),RIR group(n=28),RIR+NAS group(n=28),RIR+FPS-ZM1 group(n=8)and RIR+NAS+FPS-ZM1 group(n=8).The therapeutic effects of NAS were examined by hematoxylin-eosin(H&E)staining,and retinal ganglion cells(RGCs)*** expression of interleukin 1 beta(IL-1β),HMGB1,RAGE,and nod-like receptor 3(NLRP3)proteins and the phosphorylation of nuclear factorkappa B(p-NF-κB)were analyzed by immunohistochemistry staining and Western blot *** expression of HMGB1 protein was also detected by enzyme-linked immunosorbent assay(ELISA).RESULTS:H&E staining results showed that NAS significantly reduced retinal edema and increased the number of RGCs in RIR *** NAS therapy,the HMGB1 and RAGE expression decreased significantly,and the activation of the NF-κB/NLRP3 pathway was antagonized along with the inhibition of p-NF-κB and NLRP3 protein ***,NAS exhibited an anti-inflammatory effect by reducing IL-1β*** inhibitory of RAGE binding to HMGB1 by RAGE inhibitor FPS-ZM1 led to a significant decrease of p-NF-κB and NLRP3 expression,so as to the IL-1βexpression and retinal edema,accompanied by an increase of RGCs in RIR ***:NAS may exhibit a neuroprotective effect against RIR via the HMGB1/RAGE/NF-κB signaling pathway,which may be a useful therapeutic target for retinal disease.

关键词： retinal diseases retinal ischemia—reperfusion injury N-acetylserotonin high mobility group box 1 receptor for advanced glycation end-products nuclear factor-κB rats

A probe into the acid deposition mitigation path in China over the last four decades and beyond

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National Science Review 2024年第4期11卷 84-92页

作者： Qian Yu Xiaodong Ge Haotian Zheng jia Xing Lei Duan Dongwei Lv Dian Ding Zhaoxin Dong Yisheng Sun Posch Maximilian Danni Xie Yu Zhao Bin Zhao Shuxiao Wang Jan Mulder Thorj?rn Larssen Jiming Hao State Key Laboratory of Environmental simulation and Pollution Control School of EnvironmentTsinghua University State Key Laboratory of Pollution Control &Resource Reuse and School of the Environment Nanjing University State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex School of EnvironmentTsinghua University International Institute for Applied System Analysis(IIASA) School of Land Engineering Chang'an University Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences Norwegian Institute for Water Research

China currently has the highest acid deposition globally, yet research on its status, impacts, causes and controls is lacking. Here, we compiled data and calculated critical loads regarding acid deposition. The results showed that the abatement measures in China have achieved a sharp decline in the emissions of acidifying pollutants and a continuous recovery of precipitation p H, despite the drastic growth in the economy and energy consumption. However, the risk of ecological acidification and eutrophication showed no significant decrease. With similar emission reductions, the decline in areas at risk of acidification in China(7.0%) lags behind those in Europe(20%) or the USA(15%). This was because, unlike Europe and the USA, China's abatement strategies primarily target air quality improvement rather than mitigating ecological impacts. Given that the area with the risk of eutrophication induced by nitrogen deposition remained at 13%of the country even under the scenario of achieving the dual targets of air quality and carbon dioxide mitigation in 2035, we explored an enhanced ammonia abatement pathway. With a further 27% reduction in ammonia by 2035, China could largely eliminate the impacts of acid deposition. This research serves as a valuable reference for China's future acid deposition control and for other nations facing similar challenges.

关键词： acid deposition critical loads acidification eutrophication ammonia abatement

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生物基可持续皮革替代材料的研究现状及进展

印染 2024年第7期50卷 95-99页

作者：高煜东华大学服装与艺术设计学院上海200082

微生物和植物材料具有可生物降解性、独特的物理机械特点,以及形成和处理过程中的无污染和可再生性等优势,可用作皮革的替代材料。文中从原料来源、制备方法等方面介绍了近年来生物基皮革替代品的研究进展,指出了目前研发存在的不足,并... 详细信息

微生物和植物材料具有可生物降解性、独特的物理机械特点,以及形成和处理过程中的无污染和可再生性等优势,可用作皮革的替代材料。文中从原料来源、制备方法等方面介绍了近年来生物基皮革替代品的研究进展,指出了目前研发存在的不足,并探讨了未来的发展趋势。

关键词：生物基纺织皮革替代品可持续皮革微生物植物纤维