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Responses of soil moisture to vegetation restoration type and slope length on the loess hillslope

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Journal of Mountain Science 2018年第3期15卷 548-562页

作者： mei xue-mei MA Lan ZHU Qing-ke WANG Shu ZHANG Dong WANG Yu Key Laboratory of State Forestry Administration on Soil and Water Conservation School of Soil and Water Conservation Beijing Forestry University Haihe River Water Conservancy Commission Ministry of Water Resources

Soil moisture, a critical variable in the hydrologic cycle, is highly influenced by vegetation restoration type. However, the relationship between spatial variation of soil moisture, vegetation restoration type and slope length is controversial. Therefore, soil moisture across soil layers（0-400 cm depth） was measured before and after the rainy season in severe drought（2015） and normal hydrological year（2016） in three vegetation restoration areas（artificial forestland, natural forestland and grassland）, on the hillslopes of the Caijiachuan Catchment in the Loess area, China. The results showed that artificial forestland had the lowest soil moisture and most severe water deficit in 100-200 cm soil layers. Water depletion was higher in artificial and natural forestlands than in natural grassland. Moreover, soil moisture in the shallow soil layers（0-100 cm） under the three vegetation restoration types did not significantly vary with slope length, but a significant increase with slope length was observed in deep soil layers（below 100 cm）. In2015, a severe drought hydrological year, higher water depletion was observed at lower slope positions under three vegetation restoration types due to higher transpiration and evapotranspiration and unlikely recharge from upslope runoff. However, in 2016, a normal hydrological year, there was lower water depletion, even infiltration recharge at lower slope positions, indicating receiving a large amount of water from upslope. Vegetation restoration type, precipitation, slope length and soil depth during a rainy season, in descending order of influence, had significant effects on soil moisture. Generally, natural grassland is more beneficial for vegetation restoration than natural and artificial forestlands, and the results can provide useful information for understanding hydrological processes and improving vegetation restoration practices on the Loess Plateau

关键词： Spatial variation Soil moisture Infiltration depth Hillslope Vegetation restoration Loess Plateau

Estimation of mountain block recharge on the northern Tianshan Mountains using numerical modeling

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Journal of Mountain Science 2021年第7期18卷 1794-1810页

作者： PING Jian-hua ZHU Ya-qiang mei xue-mei LENG Wei LI Sheng ZHAO Ji-chang College of Earth Science and Technology Zhengzhou UniversityZhengzhou 450001China School of Water Conservancy Engineering Zhengzhou UniversityZhengzhou 450001China College of Geology and Exploration Engineering Xinjiang UniversityUrumqi 830047China China Institute of Geo-Environmental Monitoring Beijing 100081China

Mountain block recharge(MBR),an important water resource,is a widespread process that recharges lowland ***,little is known about MBR due to the limited climatic and geologic data in mountainous regions such as the northern central foothills of ***,we present an approach to quantify MBR through the combination of water balance calculations and numerical *** calculated from the water balance in the data-limited Tianshan Mountains is employed as a fluid-flux boundary condition in the numerical model of the *** verify the performance of the model,mean absolute error and root mean square error were *** show that the volume of water that is recharging the aquifer via MBR is 107.29 million m^(3)/yr,accounting for 2.2% of the total precipitation that falls in the ***,53.3% of that precipitation enters the plain aquifer via runoff,totaling 2,652.68 million m^(3)/*** lower volume of MBR is attributed to a major range-bounding anticline with apparent low permeability in the Tianshan *** numerical modeling of groundwater,MBR coming from bedrock was found to be significant,accounting for 14% of total aquifer recharge in the plain,only after the portion of runoff *** research contributes to a deeper understanding of MBR,and may provide instructions for estimating groundwater recharge in arid and semi-arid areas.

关键词： Mountain block recharge Water balance Numerical modeling Arid area Tianshan Mountains

Multi-model ensemble learning for battery state-of-health estimation:Recent advances and perspectives

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Journal of Energy Chemistry 2025年第1期100卷 739-759页

作者： Chuanping Lin Jun Xu Delong Jiang Jiayang Hou Ying Liang Zhongyue Zou xuesong mei State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Shaanxi Key Laboratory of Intelligent Robots School of Mechanical Engineering Xi'an Jiaotong University Department of Electrical Engineering and Automation Luoyang Institute of Science and Technology School of Mechanical Engineering Hangzhou Dianzi University

The burgeoning market for lithium-ion batteries has stimulated a growing need for more reliable battery performance monitoring. Accurate state-of-health(SOH) estimation is critical for ensuring battery operational performance. Despite numerous data-driven methods reported in existing research for battery SOH estimation, these methods often exhibit inconsistent performance across different application scenarios. To address this issue and overcome the performance limitations of individual data-driven models,integrating multiple models for SOH estimation has received considerable attention. Ensemble learning(EL) typically leverages the strengths of multiple base models to achieve more robust and accurate outputs. However, the lack of a clear review of current research hinders the further development of ensemble methods in SOH estimation. Therefore, this paper comprehensively reviews multi-model ensemble learning methods for battery SOH estimation. First, existing ensemble methods are systematically categorized into 6 classes based on their combination strategies. Different realizations and underlying connections are meticulously analyzed for each category of EL methods, highlighting distinctions, innovations, and typical applications. Subsequently, these ensemble methods are comprehensively compared in terms of base models, combination strategies, and publication trends. Evaluations across 6 dimensions underscore the outstanding performance of stacking-based ensemble methods. Following this, these ensemble methods are further inspected from the perspectives of weighted ensemble and diversity, aiming to inspire potential approaches for enhancing ensemble performance. Moreover, addressing challenges such as base model selection, measuring model robustness and uncertainty, and interpretability of ensemble models in practical applications is emphasized. Finally, future research prospects are outlined, specifically noting that deep learning ensemble is poised to advance ens

关键词： Lithium-ion battery State-of-health estimation Data-driven Machine learning Ensemble learning Ensemble diversity

基于约束满足的热轧无缝钢管生产排序模型与算法

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冶金自动化 2013年第3期37卷 39-42页

作者：王海凤薛美美李铁克北京科技大学东凌经济管理学院钢铁生产制造执行系统技术教育部工程研究中心

热轧无缝钢管生产过程复杂,其中热轧阶段的生产计划过程包括组批和生产排序两个阶段。笔者在假设组批完成的前提下,以生产跳跃惩罚最小为目标给出生产排序问题的约束满足模型,在此基础上利用节点互换算法对问题进行求解,重点解决无缝钢... 详细信息

热轧无缝钢管生产过程复杂,其中热轧阶段的生产计划过程包括组批和生产排序两个阶段。笔者在假设组批完成的前提下,以生产跳跃惩罚最小为目标给出生产排序问题的约束满足模型,在此基础上利用节点互换算法对问题进行求解,重点解决无缝钢管生产计划中的生产排序问题。仿真实验结果验证了算法的有效性。

关键词：热轧无缝钢管生产排序约束满足问题节点互换算法

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盆底仿生物电刺激促进产后子宫复旧效果研究

中国实用妇科与产科杂志 2017年第10期33卷 1074-1076页

作者：毛中英冯虹黄冬梅陈雪梅广州中医药大学附属南海妇产儿童医院广东佛山528200

目的探讨仿生物电技术对产后子宫复旧的临床疗效。方法 2015年3月至2016年11月在广州中医药大学附属南海妇产儿童医院足月分娩的20~40岁、无妊娠期合并症及并发症的初产妇150例,随机分为研究组A、B组和对照组;对照组为产后常规护理组;... 详细信息

目的探讨仿生物电技术对产后子宫复旧的临床疗效。方法 2015年3月至2016年11月在广州中医药大学附属南海妇产儿童医院足月分娩的20~40岁、无妊娠期合并症及并发症的初产妇150例,随机分为研究组A、B组和对照组;对照组为产后常规护理组;研究组在对照组基础上使用仿生物电技术分别选取不同治疗方案进行治疗;测量子宫底高度,观察恶露量、超声检查子宫复旧方情况。结果研究A、B组均较对照组产妇在产后24 h恶露量[(225.36±52.97)mL、(216.55±65.79)mL、(187.76±47.02)mL]、产后42 d子宫复旧方面,差异具有统计学意义(P<0.05)。结论产后2 h及早应用仿生物电技术治疗可促进产后子宫复旧,有效预防晚期产后出血,促进早期康复。

关键词：盆底仿生物电刺激产后子宫复旧

基于DPSIR模型的宁夏地区水土资源承载力评价

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水电能源科学 2023年第6期41卷 35-39页

作者：范德政梅雪梅任正龑李鹏郑州大学水利与土木工程学院河南郑州450001 郑州大学地热与生态地质研究中心河南郑州450001 宁夏回族自治区水土保持监测总站宁夏银川750002 西安理工大学省部共建西北旱区生态水利国家重点实验室陕西西安710048

为全面掌握宁夏地区水土资源承载力情况,促进干旱半干旱地区水土资源协调发展,基于DPSIR模型构建评价指标体系,采用CRITIC-熵权-TOPSIS评价2012-2019年宁夏地区水土资源承载力,并运用障碍度模型及R/S法探究其影响因素及预测未来趋势。... 详细信息

为全面掌握宁夏地区水土资源承载力情况,促进干旱半干旱地区水土资源协调发展,基于DPSIR模型构建评价指标体系,采用CRITIC-熵权-TOPSIS评价2012-2019年宁夏地区水土资源承载力,并运用障碍度模型及R/S法探究其影响因素及预测未来趋势。结果表明,2012-2019年,整个宁夏地区水土资源承载力呈上升趋势,但整体基本处于超载状态,而固原市是宁夏地区中水土资源承载力最好者;从障碍度分析,驱动力子系统对宁夏地区水土资源承载力的制约最强,经济密度、人口自然增长率、人均GDP、单位耕地粮食产出、人均水资源量是影响宁夏地区水土资源承载力的主要因素;根据R/S法,在未来宁夏地区水土资源承载力呈上升趋势,固原市、中卫市上升趋势显著,而其他市上升趋势较弱。

关键词：水土资源承载力 DPSIR模型 CRITIC-熵权 TOPSIS模型障碍度

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论高校图书馆定题服务的特殊性

图书馆论坛 2001年第6期21卷 67-68,99页

作者：祝银梅田学梅陈晓红武汉大学图书馆医学分馆湖北武汉430071

本文论述了知识经济时代高校专业图书馆网络环境下定题服务 (SD1)的特殊服务方式。结合实例 ,重点分析了定题服务工作的三大特殊性 :互动性与主动性、知识性与针对性、非显性与连续性 ,指出了工作中存在的问题。

关键词：高校图书馆定题服务特殊性

Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man Han Deyang Zeng Wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen Wei Yufei mei Yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： mei Zhang Wenhao Li Yangfei Chen Yang Jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation