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丹红注射液联合倍他司汀治疗急性眩晕患者的效果

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天津药学 2024年第2期36卷 33-36页

作者：周魁周流杨周雨珊上饶市立医院江西334000

目的:探究丹红注射液联合倍他司汀对急性眩晕患者脑血流动力学及凝血指标的影响。方法:于2021年2月—2023年2月选取本院诊治的急性眩晕患者60例为研究对象,以随机数字法将其分为观察组30例与对照组30例。两组入选患者均实施降压、降糖... 详细信息

目的:探究丹红注射液联合倍他司汀对急性眩晕患者脑血流动力学及凝血指标的影响。方法:于2021年2月—2023年2月选取本院诊治的急性眩晕患者60例为研究对象,以随机数字法将其分为观察组30例与对照组30例。两组入选患者均实施降压、降糖等常规治疗;对照组静脉注射45 min倍他司汀20 mg+氯化钠注射液250 ml;观察组在对照组用药基础上静脉注射45 min丹红注射液30 ml+氯化钠注射液250 ml。评价比较两组临床疗效,并比较两组治疗前后眩晕程度、脑血流动力学指标及凝血指标。结果:治疗1周后,观察组的总有效率为93.33%(28/30),对照组为73.33%(22/40),观察组显著高于对照组(P0.05);治疗1周后,两组患者DHI评分降低,BI评分升高,且观察组DHI评分显著低于对照组,观察组BI评分显著高于对照组(P0.05);治疗1周后,两组患者BA、LVA和RVA的血液流速均明显加快,且观察组快于对照组(P0.05);治疗1周后,两组患者APTT和PT均升高,且观察组显著高于对照组(P<0.05);FIB均降低,且观察组显著低于对照组(P<0.05)。结论:丹红注射液联合倍他司汀治疗急性眩晕患者临床疗效良好,可提高治疗效果与患者的生活自理能力,且改善脑血流状态与凝血状态。

关键词：丹红注射液倍他司汀急性眩晕脑血流动力学凝血指标

电力大数据研究现状及热点——基于文献计量分析

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能源研究与管理 2024年第1期16卷 27-36,42页

作者：周钰山吕涛李娜国网徐州供电公司江苏徐州221116 中国矿业大学经济管理学院江苏徐州221116

大数据技术的应用对于电力系统的安全稳定运行和可持续发展具有重要意义,因此了解电力大数据的研究现状及热点尤为必要。使用文献计量方法,从时间、国家、机构、期刊、学科、引文、作者和关键词等方面,分析了1995—2021年Web of Scienc... 详细信息

大数据技术的应用对于电力系统的安全稳定运行和可持续发展具有重要意义,因此了解电力大数据的研究现状及热点尤为必要。使用文献计量方法,从时间、国家、机构、期刊、学科、引文、作者和关键词等方面,分析了1995—2021年Web of Science收录的1100篇电力大数据文献。结果表明:电力大数据研究稳步发展并逐渐成为热点,中国的发文量最多,但国际影响力有待提高;研究热点包括智能电网、负荷预测、电力系统安全和稳定等;电力大数据研究逐渐趋于电力系统安全稳定、智能高效方向。未来需要在电力与经济社会大数据融合、电力大数据多场景应用、电力大数据多主体参与等方面做更多探讨。

关键词：电力大数据文献计量共现分析可视化

亚洲高山区冰川厚度变化光学立体和双基SAR卫星监测数据、方法与展望

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测绘学报 2024年第5期53卷 779-800页

作者：周玉杉李新郑东海任姗姗汪赢政李志伟中南大学地球科学与信息物理学院湖南长沙410083 中国科学院青藏高原研究所青藏高原地球系统与资源环境重点实验室北京100101 中国科学院青藏高原研究所国家青藏高原科学数据中心北京100101 兰州大学资源环境学院甘肃兰州730000

冰川厚度变化是评估区域冰储量变化的最重要指标,以光学立体卫星和双基干涉SAR卫星为代表的冰川区高程测量已成为评估大范围冰储量变化的主要手段。本文首先总结了当前应用于亚洲高山区冰川区的主要光学和雷达卫星数据及其测高精度;然后... 详细信息

冰川厚度变化是评估区域冰储量变化的最重要指标,以光学立体卫星和双基干涉SAR卫星为代表的冰川区高程测量已成为评估大范围冰储量变化的主要手段。本文首先总结了当前应用于亚洲高山区冰川区的主要光学和雷达卫星数据及其测高精度;然后,对当前冰川厚度变化卫星监测的方法(即监督校正的DEM差分法、自动化校正的DEM差分法、时序DEM参数化回归法和非参数化回归法)及其应用情况进行了梳理和总结,发现当前研究存在冰川雪盖区高程估计不准、雷达波穿透深度估计不准和季节尺度冰厚变化监测难等问题,导致当前对冰川局部变化过程的认识有限;最后,探讨了未来有关冰厚变化监测的潜在发展方向,提出利用当前存档卫星数据、融合多源测高数据、结合未来高时空分辨率观测计划将有助于解决当前所面临的问题。

关键词：亚洲高山区山地冰川卫星观测厚度变化

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Fast,simple,efficient Agrobacterium rhizogenes-mediated transformation system to non-heading Chinese cabbage with transgenic roots

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Horticultural Plant Journal 2024年第2期10卷 450-460页

作者： Huiyu Wang yushan Zheng Qian zhou Ying Li Tongkun Liu Xilin Hou State Key Laboratory of Crop Genetics&Germplasm Enhancement Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(East China)Ministry of Agriculture and Rural Affairs of ChinaEngineering Research Center of Germplasm Enhancement and Utilization of Horticultural CropsMinistry of Education of ChinaNanjing Agricultural UniversityNanjingJiangsu 210095China Nanjing Suman Plasma Engineering Research Institute Nanjing Agricultural UniversityNanjingJiangsu 210095China

Non-heading Chinese cabbage, a variety of Brassica campestris, is an important vegetable crop in the Yangtze River Basin of China. However,the immaturity of its stable transformation system and its low transformation efficiency limit gene function research on non-heading Chinese cabbage. Agrobacterium rhizogenes-mediated(ARM) transgenic technology is a rapid and effective transformation method that has not yet been established for non-heading Chinese cabbage plants. Here, we optimized conventional ARM approaches(one-step and two-step transformation methods) suitable for living non-heading Chinese cabbage plants in nonsterile environments. Transgenic roots in composite non-heading Chinese cabbage plants were identified using phenotypic detection, fluorescence observation, and PCR analysis. The transformation efficiency of a two-step method on four five-day-old non-heading Chinese cabbage seedlings(Suzhouqing, Huangmeigui, Wuyueman, and Sijiu Caixin) was 43.33%-51.09%, whereas using the stout hypocotyl resulted in a transformation efficiency of 54.88% for the 30-day-old Sijiu *** one-step method outperformed the two-step method;the transformation efficiency of different varieties was above 60%, and both methods can be used to obtain transgenic roots for functional studies within one month. Finally, optimized ARM transformation methods can easily,quickly, and effectively produce composite non-heading Chinese cabbage plants with transgenic roots, providing a reliable foundation for gene function research and non-heading Chinese cabbage genetic improvement breeding.

关键词： Agrobacterium rhizogenes Non-heading Chinese cabbage Transgenic roots Composite plant Transformation efficiency

The joint driving effects of climate and weather changes caused the Chamoli glacier-rock avalanche in the high altitudes of the India Himalaya

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Science China Earth Sciences 2021年第11期64卷 1909-1921页

作者： yushan zhou Xin LI Donghai ZHENG Zhiwei LI Baosheng AN Yingzheng WANG Decai JIANG Jianbin SU Bin CAO National Tibetan Plateau Data Center State Key Laboratory of Tibetan Plateau Earth System and Resource EnvironmentInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China School of Geosciences and Info-Physics Central South UniversityChangsha 410083China College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049Chin

Ice avalanches are one of the most devastating mountain hazards,and can pose a great risk to the security of the surrounding *** ice avalanches have been widely observed in mountainous regions around the world,only a few ice avalanche events have been studied comprehensively,due to the lack of available *** this study,in response to the recent catastrophic rock-ice avalanche(7 February 2021)at Chamoli in the India Himalaya,we used high-resolution satellite images and found that this event was actually a glacier-rock landslide,where the collapse of the rock-ice body was caused by the sliding of the bedrock beneath the glacier,for which the source area and volume loss were about 2.89×10^(5) m^(2) and 2.46×10^(7) m^(3),respectively,corresponding to an average elevation change of about−85 ***,visual analysis of the dense time-series satellite images shows that the overall downward sliding of the collapsed rock-ice body initiated around the summer of 2017,and thereafter exhibited clear seasonality(mainly in summer).Meteorological analysis reveals a strong rainfall anomaly in the initiation period of the sliding and a remarkable winter warming anomaly in the 40 days before the *** of multi-temporal digital elevation models(DEMs)further suggest that the glacier geometry in the collapsed areas was likely changing(i.e.,accelerated surface thinning in the lower part of the glaciers and insignificant change in the upper part),which is consistent with the region-wide climate ***,by combining the above findings and a geomorphic analysis,we conclude that the rock-ice avalanche event was mainly caused by the joint effects of climate and weather changes acting on a steeply sloping and fracture-prone geological *** findings of this study provide new and valuable evidence for the study of slope/glacier instability at high *** study also highlights that,for the Himalaya and other high mountain ranges,there is an

关键词： Rock-ice avalanche Himalaya Mountain hazards Climate change Remote sensing

Stress corrosion cracking of EV31A in 0.1 M Na_(2)SO_(4) saturated with Mg(OH)_(2)

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Journal of Magnesium and Alloys 2018年第4期6卷 337-345页

作者： Yifeng Li yushan zhou Zhiming Shi Jeffrey Venezuela Akif Soltan Andrej Atrens School of Mechanical and Mining Engineering The University of QueenslandSt LuciaQueensland 4072Australia University of Science and Technology Beijing 30 Xueyuan RoadHaidian DistrictBeijing 100083China

This paper studied the stress corrosion cracking(SCC)of EV31A in 0.1 M Na 2 SO 4 saturated with Mg(OH)2 using linearly increasing stress tests,compared with pure Mg and *** three materials were susceptible to *** susceptibility increased with decreasing applied stress *** threshold stress was 0.3×(yield stress)for pure Mg,0.6×(yield stress)for EV31A,and 0.8×(yield stress)for *** SCC velocities at an applied stress rate of 7.3×10^(-4)MPa s^(-1)were 7.2×10^(-8)m s^(−1)for pure Mg,5.6×10^(-9)m s^(-1)for WE43B,and 1.5×10^(-9)m s^(-1)for EV31A.

关键词： SCC(stress corrosion cracking) Magnesium alloys LIST(linearly increasing stress test)

Extraction and back-extraction behaviors of 14 rare earth elements from sulfuric acid medium by TODGA

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Journal of Rare Earths 2018年第6期36卷 642-647页

作者： Huiting Yuan Weixiang Hong yushan zhou Baisong Pu Aijun Gong Tao Xu Qishan Yang Fukai Li Lina Qiu Weiwei Zhang Yuning Liu School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China North China Rare Earth Hi-Tech Company Limited Baotou 014030China School of Chemistry and Chemical Engineering Inner Mangolia University of Science and TechnologyBaotou 014010China

The unique physical and chemical properties of rare earth elements lay the foundation for their extensive application. N,N,N’,N’ Tetra-octyl-3-oxopentanediamide(TODGA) is excellent in its ability of extracting rare earth elements and it is favored for green initiative. In this paper, the extraction and back-extraction of14 rare earth elements by TODGA were studied. Experiments show that in conditions of 6 mol/L sulfuric acid, the extraction temperature of 25 ℃,the phase ratio of 1:1 and 0.04 mol/LTODGA(aviation kerosene as the diluent), the extraction rates of 14 rare earth elements including lanthanum, cerium, praseodymium,neodymium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, and yttrium were 99.00%-99.73%. Mixed with hydrochloric acid and nitric acid(HCl 3.5 mol/L, HNO30.5 mol/L), the recoveries of the 14 rare earth elements are 91.52%-99.91% when the extraction temperature is 25 ℃ and the ratio is 1:1. The following application is based on the optimum conditions above with practical samples(from the roasting production line of China North Rare Earth High-tech Company Limited) for extraction and back-extraction experiments. Experiments show that TODGA has excellent enrichment effect on 14 rare earth elements, the extraction rates are 91.36%-99.80%, the back-extraction rates are 87.29%-99.64% and the total recoveries are 81.19%-99.44%.

关键词： Rare earth Extraction Back-extraction N,N,N',N' Tetra-octyl-3-oxopentanediamide(TODGA) Enrichment

Experimental investigation of omnidirectional multiphysics bilayer invisibility cloak with anisotropic geometry

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Chinese Physics B 2024年第3期33卷 649-658页

作者：丰火雷张兴伟周利敏张悦凯倪玉山 Department of Aeronautics and Astronautics Fudan UniversityShanghai 200433China Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin 150001China

Thermal-electric bilayer invisibility cloak can prevent the heat flux and electric current from touching the object without distorting the external temperature and electric potential fields *** this paper,we design an omnidirectional thermal-electric invisibility cloak with anisotropic *** on the theory of neutral inclusion,the anisotropic effective thermal and electric conductivities of confocal elliptical bilayer core-shell structure are derived,thus obtaining the anisotropic matrix material to eliminate the external disturbances *** inner shell of the cloak is selected as an insulating material to shield the heat flux and electric ***,the omnidirectional thermal-electric cloaking effect is verified numerically and experimentally based on the theoretical anisotropic matrix and manufactured composite structure,***,we achieve the thermal-electric cloaking effect under a specific direction of heat flux and electric current using the isotropic natural materials to broaden the selection range of *** method proposed to eliminate anisotropy and achieve the omnidirectional effect could also be expanded to other different physical fields for the metadevices with different functions.

关键词： omni-directionality multiphysics bilayer confocal ellipse invisibility cloak

基于深度强化学习组合优化的配电网拓扑控制研究

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电网技术 2022年第7期46卷 2547-2554页

作者：闫冬彭国政高海龙陈盛周钰山中国电力科学研究院有限公司北京市海淀区100192 国网江苏省电力有限公司徐州供电分公司江苏省徐州市221000

基于深度强化学习的配电网故障恢复拓扑控制策略,文章首先设计配电网拓扑状态表征和决策动作规则支撑组合优化求解;其次,利用改进指针网络结构配合深度强化学习算法实现适用于多类故障恢复策略的模型自学习和端到端计算;最后,通过改进... 详细信息

基于深度强化学习的配电网故障恢复拓扑控制策略,文章首先设计配电网拓扑状态表征和决策动作规则支撑组合优化求解;其次,利用改进指针网络结构配合深度强化学习算法实现适用于多类故障恢复策略的模型自学习和端到端计算;最后,通过改进掩码机制降低探索求解复杂度进而提升训练学习效率。通过在预设条线路上随机设置故障组合,在单一和混合初始状态样本集上验证文章提出的改进机制和模型计算有效性,以期为深度学习技术在配电网运行方式优化研究提供有效参考。

关键词：深度强化学习拓扑控制组合优化指针网络