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Evaluating the Capabilities of Soil Enthalpy, Soil Moisture and Soil Temperature in Predicting Seasonal Precipitation

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Advances in Atmospheric Sciences 2018年第4期35卷 445-456页

作者： changyu zhao Haishan CHEN Shanlei SUN Key Laboratory of Meteorological Disaster Ministry of Education (KLME)/International Joint Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD)Nanjing University of Information Science and Technology (NUIST) School of Atmospheric Science Nanjing University of Information Science and Technology (NUIST)

Soil enthalpy （H） contains the combined effects of both soil moisture （w） and soil temperature （T） in the land surface hydrothermal process. In this study, the sensitivities of H to w and T are investigated using the multi-linear regression method. Results indicate that T generally makes positive contributions to H, while w exhibits different （positive or negative） impacts due to soil ice effects. For example, w negatively contributes to H if soil contains more ice; however, after soil ice melts, w exerts positive contributions. In particular, due to lower w interannual variabilities in the deep soil layer （i.e., the fifth layer）, H is more sensitive to T than to w. Moreover, to compare the potential capabilities of H, w and T in precipitation （P） prediction, the Huanghe-Huaihe Basin （HHB） and Southeast China （SEC）, with similar sensitivities of H to w and T, are selected. Analyses show that, despite similar spatial distributions of H-P and T-P correlation coefficients, the former values are always higher than the latter ones. Furthermore, H provides the most effective signals for P prediction over HHB and SEC, i.e., a significant leading correlation between May H and early summer （June） P. In summary, H, which integrates the effects of T and w as an independent variable, has greater capabilities in monitoring land surface heating and improving seasonal P prediction relative to individual land surface factors （e.g., T and w）.

关键词： seasonal precipitation prediction land surface process soil enthalpy soil moisture soil temperature

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晕渲图技术在气象模式数据可视化上的应用

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气象科技 2024年第3期52卷 318-329页

作者：沃伟峰王岩赵昶昱徐蓉徐迪峰浙江省宁波市气象局宁波315012 宁波市智慧气象重点实验室宁波315012 浙江省宁波市气象台院士工作站宁波315012 上海市浦东新区气象局上海200135

晕渲法根据山体阴影值的原理,利用光照角度和方向、坡度和坡向的关系来计算光通量的明暗值,利用色调的明暗来展现气象模式数据的立体感。晕渲图的着色方法是将每个格点上的明暗值作为HSV色彩模式中的明度,结合饱和度和色度获得HSV色彩值... 详细信息

晕渲法根据山体阴影值的原理,利用光照角度和方向、坡度和坡向的关系来计算光通量的明暗值,利用色调的明暗来展现气象模式数据的立体感。晕渲图的着色方法是将每个格点上的明暗值作为HSV色彩模式中的明度,结合饱和度和色度获得HSV色彩值,再通过HSV色彩模式和RGB色彩模型之间的转换,使用RGB色彩模型进行着色,实现气象模式数据彩色晕渲图的绘制。本文在气象模式数据的可视化工作中,利用晕渲图技术,实现对物理概念上与地形类似的气压、位势高度等数据的三维绘制。相比于传统的等值线填色方法,晕渲图技术能够直观表现大气形势场的立体分布,以凹凸效果表现高低值天气系统,通过坡面的陡度体现天气系统的梯度变化;能够展现数据的像素级细节,识别梯度较小的涡流扰动,显示等效地形影响,帮助气象工作者更好地解释数据,为气象模式中数据处理的改进提供参考。

关键词：晕渲图气象模式数据三维可视化 HSV模型

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专利主题关联视角下储能技术演化分析

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中国科技资源导刊 2024年第4期56卷 63-72页

作者：徐进赵长宇王范华范慧博国家电投集团内蒙古能源有限公司内蒙古通辽028011

利用专利主题关联视角对储能技术演化进行分析,深度挖掘专利数据,以揭示储能技术的创新轨迹和关键节点。建立LDA模型并结合主题前沿性和新颖度指标筛选出具有前瞻性的技术主题,并综合考虑专利创新性、有效性以及主题贡献率等建立主题之... 详细信息

利用专利主题关联视角对储能技术演化进行分析,深度挖掘专利数据,以揭示储能技术的创新轨迹和关键节点。建立LDA模型并结合主题前沿性和新颖度指标筛选出具有前瞻性的技术主题,并综合考虑专利创新性、有效性以及主题贡献率等建立主题之间的语义关联矩阵。研究表明,以专利主题关联视角进行前沿主题识别和技术演化具有一定的可行性。研究结果为储能领域的技术主题识别和技术演化分析提供了参考借鉴。

关键词：专利主题关联储能技术演化分析主题识别技术演化

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电感耦合等离子体发射光谱法测定稀土镁硅铁合金中镁含量的不确定度评定

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冶金标准化与质量 2024年第3期62卷 8-13页

作者：蔡伟亭张明慧王安丽赵长玉宋君鹏天津包钢稀土研究院有限责任公司天津300300

本文对电感耦合等离子体发射光谱法测定稀土镁硅铁合金中镁元素含量的测量不确定度进行评定。根据检测方法及数学模型,从标准物质、校准拟合曲线、样品称量、定容、稀释及重复测定等方面分析不确定度来源,并计算对应的相对标准不确定度... 详细信息

本文对电感耦合等离子体发射光谱法测定稀土镁硅铁合金中镁元素含量的测量不确定度进行评定。根据检测方法及数学模型,从标准物质、校准拟合曲线、样品称量、定容、稀释及重复测定等方面分析不确定度来源,并计算对应的相对标准不确定度,同时将各个分量进行合成并拓展。计算得:当稀土镁硅铁合金中镁元素含量为7.12%时,其扩展不确定度为0.19%(取置信区间为95%,包含因子k=2)。通过评定结果表明,标准溶液配置过程、重复测定、校准曲线拟合及样品溶液稀释过程对测定结果影响较明显。

关键词：测量不确定度评定电感耦合等离子体发射光谱法稀土镁硅铁合金镁

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Influence of two-step aging on structure and stress corrosion sensitivity of friction stir welded 7050-T7451 aluminum alloys

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China Welding 2020年第4期29卷 1-6页

作者： Zhang Hua Guo Qilong zhao changyu Lin Sanbao Shi Gongqi School of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China The Welding Institute Cambridge CB216ALUK

3 mm thick 7050-T7451 aluminum alloy joint was obtained by friction stir welding, and the two-step aging treatment was performed at 121 ℃ × 5 h + 163 ℃× 27 h after welding. Microstructure, hardness profiles and stress corrosion sensitivity of the joint were measured and studied. The results indicate that through the two-step aging, the grain size is coarsened, the age-hardening precipitates and PFZ become wider at the same time, which results in the discontinuous grain boundary;the microhardness of the FSW joints decreased, but the heat-affected zone significantly narrowed, which increased the uniformity of the microhardness of the FSW joints;and the two-stage aging effectively reduced the stress corrosion sensitivity of the FSW joints. The joints with aging treatment were not broken after 60 days,however all the joints without aging treatment were broken within 1 day.

关键词： 7050 aluminum alloy friction stir welding two-step aging stress corrosion sensitivity

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One-year clinical study of NeuroR egen scaffold implantation following scar resection in complete chronic spinal cord injury patients

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Science China(Life Sciences) 2016年第7期59卷 647-655页

作者： Zhifeng Xiao Fengwu Tang Jiaguang Tang Huilin Yang Yannan zhao Bing Chen Sufang Han Nuo Wang Xing Li Shixiang Cheng Guang Han changyu zhao Xiaoxiong Yang Yumei Chen Qin Shi Shuxun Hou Sai Zhang Jianwu Dai State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology Chinese Academy of Sciences Department of Orthopaedics First Affiliated Hospital of People’s Liberation Army (PLA) General Hospital Neurology and Neurosurgery Hospital Affiliated Hospital of Logistics University of Chinese People’s Armed Police Forces (CAPF) Department of Orthopaedics The First Affiliated Hospital of Soochow University Department of Nerve Electrophysiology First Affiliated Hospital of People’s Liberation Army (PLA) General Hospital

The objective of this clinical study was to assess the safety and feasibility of the collagen scaffold, Neuro Regen scaffold, one year after scar tissue resection and implantation. Scar tissue is a physical and chemical barrier that prevents neural regeneration. However, identification of scar tissue is still a major challenge. In this study, the nerve electrophysiology method was used to distinguish scar tissue from normal neural tissue, and then different lengths of scars ranging from 0.5–4.5 cm were surgically resected in five complete chronic spinal cord injury(SCI) patients. The NeuroR egen scaffold along with autologous bone marrow mononuclear cells(BMMCs), which have been proven to promote neural regeneration and SCI recovery in animal models, were transplanted into the gap in the spinal cord following scar tissue resection. No obvious adverse effects related to scar resection or Neuro Regen scaffold transplantation were observed immediately after surgery or at the 12-month follow-up. In addition, patients showed partially autonomic nervous function improvement, and the recovery of somatosensory evoked potentials(SSEP) from the lower limbs was also detected. The results indicate that scar resection and Neuro Regen scaffold transplantation could be a promising clinical approach to treating SCI.

关键词： NeuroRegen scaffold chronic spinal cord injury scar resection collagen scaffold transplantation bone marrow mon-onuclear cells tissue regeneration

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Electrostatic Interaction-directed Construction of Hierarchical Nanostructured Carbon Composite with Dual Electrical Conductive Networks for Zinc-ion Hybrid Capacitors with Ultrastability

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Energy & Environmental Materials 2024年第1期7卷 188-196页

作者： changyu Leng Zongbin zhao Xuzhen Wang Yuliya V.Fedoseeva Lyubov G.Bulusheva Alexander V.Okotrub Jian Xiao Jieshan Qiu State Key Lab of Fine Chemicals School of Chemical Engineering Liaoning Key Lab for Energy Materials and Chemical Engineering Dalian University of Technology Nikolaev Institute of Inorganic Chemistry Siberian Branch of the Russian Academy of Sciences College of Chemical Engineering Beijing University of Chemical Technology

Metal-organic framework(MOF)-derived carbon composites have been considered as the promising materials for energy ***,the construction of MOF-based composites with highly controllable mode via the liquid-liquid synthesis method has a great challenge because of the simultaneous heterogeneous nucleation on substrates and the self-nucleation of individual MOF nanocrystals in the liquid phase.

关键词： carbon composite electrostatic interaction metal–organic framework coating self-assembly zinc-ion hybrid capacitor

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低压烧结对NdFeB磁体微观结构与服役稳定性的影响

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稀有金属材料与工程 2023年第1期52卷 74-80页

作者：赵常宇刘颖赵伟侯贺楠李军四川大学材料科学与工程学院四川成都610065

研究了NdFeB磁体微观结构和服役稳定性的内在联系。结果表明,低压烧结NdFeB磁体具有更加细小的晶粒尺寸和分布更为均匀的晶间富钕相,有利于磁体获得更小的矫顽力温度系数,从而提高其温度稳定性。对比真空烧结后的磁体,低压烧结磁体的矫... 详细信息

研究了NdFeB磁体微观结构和服役稳定性的内在联系。结果表明,低压烧结NdFeB磁体具有更加细小的晶粒尺寸和分布更为均匀的晶间富钕相,有利于磁体获得更小的矫顽力温度系数,从而提高其温度稳定性。对比真空烧结后的磁体,低压烧结磁体的矫顽力温度系数从-0.488%/℃减小至-0.472%/℃。但是富钕相从三角晶界向主相晶间流动形成了完整的网状结构,不利于磁体的耐腐蚀性能。低压烧结磁体在3.5%(质量分数)NaCl溶液中浸泡后腐蚀失重更为严重,表现出更强的腐蚀倾向。

关键词：低压烧结NdFeB磁体微观结构温度稳定性耐腐蚀性能

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Long-term clinical observation of patients with acute and chronic complete spinal cord injury after transplantation of Neuro Regen scaffold

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Science China(Life Sciences) 2022年第5期65卷 909-926页

作者： Fengwu Tang Jiaguang Tang Yannan zhao Jiaojiao Zhang Zhifeng Xiao Bing Chen Guang Han Na Yin Xianfeng Jiang changyu zhao Shixiang Cheng Ziqiang Wang Yumei Chen Qiaoling Chen Keran Song Zhiwei Zhang Junjie Niu Lingjun Wang Qin Shi Liang Chen Huilin Yang Shuxun Hou Sai Zhang Jianwu Dai Characteristics Medical Center of the Chinese People’s Armed Police Forces(CAPF) Tianjin 300162China Fourth Medical Center of People’s Liberation Army(PLA)General Hospital Beijing 100048China Department of Orthopaedics Beijing Tongren HospitalBeijing 100730China State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100190China Beijing ZhongKeZaiKang Biotechnology Co. LtdBeijing 101407China Department of Rehabilitation the 983rd Hospital of the Joint Logistics Support Force of the Chinese People′s Liberation ArmyTianjin 300141China Department of Orthopaedics the First Affiliated Hospital of Soochow UniversitySuzhou 215006China

Spinal cord injury(SCI)often results in an inhibitory environment at the injury *** our previous studies,transplantation of a scaffold combined with stem cells was proven to induce neural regeneration in animal models of complete *** on these preclinical studies,collagen scaffolds loaded with the patients’own bone marrow mononuclear cells or human umbilical cord mesenchymal stem cells were transplanted into SCI *** patients with acute complete SCI and 51 patients with chronic complete SCI were enrolled and followed up for 2 to 5 *** serious adverse events related to functional scaffold transplantation were *** the patients with acute SCI,five patients achieved expansion of their sensory positions and six patients recovered sensation in the bowel or ***,four patients regained voluntary walking ability accompanied by reconnection of neural signal *** patients with chronic SCI,16 patients achieved expansion of their sensation level and 30 patients experienced enhanced reflexive defecation sensation or increased skin sweating below the injury *** half of the patients with chronic cervical SCI developed enhanced finger *** long-term follow-up results suggest that functional scaffold transplantation may represent a feasible treatment for patients with complete SCI.

关键词： complete spinal cord injury collagen scaffold function recovery clinical study

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Tumor microenvironment-activated theranostic nanoreactor for NIR-II Photoacoustic imaging-guided tumor-specific photothermal therapy

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Fundamental Research 2024年第1期4卷 178-187页

作者： Nan Yang Hui Li changyu Cao Lei zhao Xuejiao Song Wenjun Wang Wenjing Xu Yewei Zhang Peng Chen Xiaochen Dong Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) School of Physical and Mathematical SciencesNanjing Tech University(NanjingTech)Nanjing 211816China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China Department of Hepatobiliary and Pancreatic Surgery the Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210011China School of Chemical and Biomedical Engineering Lee Kong Chian School of MedicineNanyang Technological University62 Nanyang DriveSingapore 637459Singapore

Theranostic agents that can be sensitively and specifically activated by the tumor microenvironment(TME)have recently attracted considerable *** this study,TME-activatable 3,3′,5,5′-tetramethylbenzidine(TMB)-copper peroxide(CuO_(2))@poly(lactic-co-glycolic acid)(PLGA)@red blood cell membrane(RBCM)(TCPR)nanoparticles(NPs)for second near-infrared photoacoustic imaging-guided tumor-specific photothermal therapy were developed by co-loading CuO_(2)NPs and TMB into PLGA camouflaged by *** an efficient H_(2)O_(2)supplier,once exposed to a proton-rich TME,CuO_(2)NPs can generate H_(2)O_(2)and Cu^(2+),which are further reduced to Cu^(+) by endogenous ***,the Cu^(+)-mediated Fenton-like reaction produces cytotoxic·OH to kill the cancer cells and induce TMB-mediated photoacoustic and photothermal *** with the RBCM modification-prolonged blood circulation,TCPR NPs display excellent specificity and efficiency in suppressing tumor growth,paving the way for more accurate,safe,and efficient cancer theranostics.

关键词： Nanoparticles Photoacoustic imaging Second near-infrared region Tumor microenvironment Self-sufficient H_(2)O_(2)

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