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基于精细化空间格局的城市承灾体脆弱性评估

水科学进展 2024年第1期35卷 38-47页

作者：徐宗学唐清竹陈浩杨芳城市水循环与海绵城市技术北京市重点实验室北京100875 北京师范大学水科学研究院北京100875 珠江水利委员会珠江水利科学研究院广东广州510611

针对目前流域内部跨行政区单元空间精细化模拟并用于评估城市洪涝灾害工作的空白,本文着重聚焦精细化经济指标空间分布并将多源数据融合,构建了基于精细化空间格局的城市承灾体脆弱性评估体系,量化了深圳河流域脆弱性等级。研究结果表明... 详细信息

针对目前流域内部跨行政区单元空间精细化模拟并用于评估城市洪涝灾害工作的空白,本文着重聚焦精细化经济指标空间分布并将多源数据融合,构建了基于精细化空间格局的城市承灾体脆弱性评估体系,量化了深圳河流域脆弱性等级。研究结果表明:单一数据不足以准确模拟流域GDP密度,结合多源数据是进行GDP空间精细化更加有效的办法;深圳河流域GDP密度与第二、三产业空间化结果显示出高度一致性,产值密度最高达617214万元/km^(2);流域两岸脆弱性等级存在显著差异和区域特征,深圳侧脆弱性明显高于香港侧,高脆弱性地区约占流域面积的8.8%。研究结果有助于识别灾害危险性大小和损失程度,提高城市洪涝灾害评估的精确性。

关键词：城市洪涝承灾体脆弱性空间精细化深圳河

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连续弯段溢洪道糙条消能工整流特性试验研究

长江科学院院报 2024年第3期41卷 71-78页

作者：马豪牧振伟樊帆顾元皓新疆农业大学水利与土木工程学院乌鲁木齐830052 新疆农业大学新疆水利工程安全与水灾害防治重点实验室乌鲁木齐830052 新疆阜康抽水蓄能有限公司乌鲁木齐830000

为探究糙条消能工在连续弯段溢洪道上导流效果影响因子排序和糙条导流特性,采取9因素3水平的正交试验设计方案进行物理模型试验,引入超高变异系数C v对导流效果进行评价;对影响水流结构的因子进行量纲分析及多元回归处理,建立评价导流... 详细信息

为探究糙条消能工在连续弯段溢洪道上导流效果影响因子排序和糙条导流特性,采取9因素3水平的正交试验设计方案进行物理模型试验,引入超高变异系数C v对导流效果进行评价;对影响水流结构的因子进行量纲分析及多元回归处理,建立评价导流效果的多因素影响模型。结果表明:糙条布设角度和糙条高度分别对2个弯段中水流结构影响最大,这2个因素直接影响糙条平衡水面差、稳定流态效果的优劣。剔除影响较小的共用因素,得出糙条消能工最优导流布置方案;各类函数模型中最大拟合优度为0.822,拟合方程对实测值进行对比验证,二者相对误差范围在2.78%~7.15%之间。研究成果可为连续弯段溢洪道整流分析提供理论参考。

关键词：糙条消能工连续弯段溢洪道超高变异系数正交设计多元回归分析

Highly Thermally Conductive and Structurally Ultra‑Stable Graphitic Films with Seamless Heterointerfaces for Extreme Thermal Management

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Nano-Micro Letters 2024年第3期16卷 383-397页

作者： Peijuan Zhang Yuanyuan hao Hang Shi Jiahao Lu Yingjun Liu Xin Ming Ya Wang Wenzhang fang Yuxing Xia Yance Chen Peng Li Ziqiu Wang Qingyun Su Weidong Lv Ji Zhou Ying Zhang Haiwen Lai Weiwei Gao Zhen Xu Chao Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringKey Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang ProvinceZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032People’s Republic of China Beijing Spacecrafts Manufacturing Co. LtdBeijing Friendship Road 104Haidian DistrictBeijing 100094People’s Republic of China Beijing Institute of Space Mechanics and Electricity Beijing Friendship Road 104Haidian DistrictBeijing 100094People’s Republic of China China Academy of Aerospace Aerodynamics Beijing 100074People’s Republic of China Hangzhou Gaoxi Technol Co. LtdHangzhou 311113People’s Republic of China International Research Center for X Polymers International CampusZhejiang UniversityHaining 314400People’s Republic of China

Highly thermally conductive graphitic film(GF)materials have become a competitive solution for the thermal management of high-power electronic ***,their catastrophic structural failure under extreme alternating thermal/cold shock poses a significant challenge to reliability and ***,we present the first investigation into the structural failure mechanism of GF during cyclic liquid nitrogen shocks(LNS),which reveals a bubbling process characterized by“permeation-diffusion-deformation”*** overcome this long-standing structural weakness,a novel metal-nanoarmor strategy is proposed to construct a Cu-modified graphitic film(GF@Cu)with seamless *** well-designed interface ensures superior structural stability for GF@Cu after hundreds of LNS cycles from 77 to 300 ***,GF@Cu maintains high thermal conductivity up to 1088 W m^(−1)K^(−1)with degradation of less than 5%even after 150 LNS cycles,superior to that of pure GF(50%degradation).Our work not only offers an opportunity to improve the robustness of graphitic films by the rational structural design but also facilitates the applications of thermally conductive carbon-based materials for future extreme thermal management in complex aerospace electronics.

关键词： Highly thermally conductive Structurally ultra-stable Graphitic film Extreme thermal management Liquid nitrogen bubbling

The DNA damage and regulatory strategy in hematopoietic stem cells after irradiation exposure:Progress and challenges

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Radiation Medicine and Protection 2024年第1期5卷 16-23页

作者： Yanying Liu Naicheng Chen fang Chen hao Zeng Lijing Yang Junping Wang Mengjia Hu State Key Laboratory of Trauma Burns and Combined InjuryInstitute of Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University(Army Medical University)Chongqing 400038China 31612 Unit of PLA Fujian 350200China Chinese PLA Center for Disease Control and Prevention Beijing 100071China

The hematopoietic system is susceptible to ionizing radiation(IR),which can cause acute hematopoietic failure or long-term *** the most primitive cells of the hematopoietic hierarchy,hematopoietic stem cells(HSCs)maintain lifelong hematopoietic homeostasis and promote hematopoietic regeneration during *** studies have shown that nuclear and mitochondrial genomes are the main targets of radiation injury in *** importantly,the damage of DNA may trigger a series of biological responses that largely determine HSC fate following IR *** some essential pathways and factors involved in DNA injury and damage in HSCs have been revealed,a comprehensive understanding of the biological effects of radiation on HSCs still needs to be *** review focuses on recent insights into the molecular mechanisms underlying DNA damage and repair in HSCs after *** summarize corresponding regulatory measures,which may provide a reference for further research in this field.

关键词： Ionizing radiation Hematopoietic stem cell DNA double-strand break DNA damage response DNA damage repair

Ultrafast sodium storage of alkylamine molecule tailored MnPSenabled by quasi-topological intercalation mechanism

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Science China Chemistry 2024年

作者： Xueyang Tu Ke Fan Baixin Peng Zhuoran Lv Yiran hao Wujie Dong Wei Zhao Zuocheng Wang Haitao Huang Yuqiang fang Fuqiang Huang State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Research Institute for Smart Energy The Hong Kong Polytechnic University State Key Lab of Metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Zhangjiang Institute for Advanced Study Shanghai Jiao Tong University Jiangxi Far East Battery Co. Ltd.

Two-dimensional transition metal trithiophosphates （TMPS3,TM=Mn,Fe,Co,etc.） are competitive anode materials for sodium-ion batteries （SIBs） due to their high theoretical capacity (>1,300 mAh g-1) but suffer from limited practical capacity(～300 mAh g-1) and inferior rate capability caused by sluggish Na+intercalation/deintercalation kinetics and severe structural ***,alkylamine molecules are first proposed as intercalation guests to significantly boost the electrochemical activity and stability of *** to MnPS3,C3H9N-MnPS3enlarges the interlayer spacing from 6.48 to 10.23?and shows a 10～5times higher electrical conductivity,which provides fast ion/electron transport and high strain adaptability,realizing a quasi-topological Na+intercalation ***,C3H9N-MnPS3exhibits an ultrahigh reversible capacity of 775m Ah g-1at 0.5 A g-1and superior high-rate cycling stability with～100%capacity retention after 2,500 cycles at 15 A g-1,ranking it among the top metal trithiophosphate-based anode materials *** calculations indicate that the improved sodium storage performance of C3H9N-MnPS3results from the reduced bonding energy of P–S bonds and increased adsorption energy of Na+.This work is expected to provide an efficient strategy for the design of high-performance layered anode materials for SIBs.

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关于建设文化强国的理论思考

思想理论教育导刊 2024年第5期 24-32页

作者：吴浩方霁北京外国语大学区域与全球治理高等研究院北京外国语大学丝绸之路研究院北方工业大学马克思主义学院

习近平主政浙江期间高度重视文化工作,将建设文化大省作为“八八战略”中的重要一环,进行了深入的探索。他在剖析文化的角色功能、总结文化的核心价值、规划文化发展的实践路径等方面作出了一系列理论探索与改革实践。党的十八大后,习... 详细信息

习近平主政浙江期间高度重视文化工作,将建设文化大省作为“八八战略”中的重要一环,进行了深入的探索。他在剖析文化的角色功能、总结文化的核心价值、规划文化发展的实践路径等方面作出了一系列理论探索与改革实践。党的十八大后,习近平围绕建设社会主义文化强国这一重要任务,作出了一系列新的重要论述与实践部署。回溯习近平主政浙江时关于建设文化大省的探索与改革,有助于我们深入理解把握习近平关于建设文化强国重要论述的核心要义,大力推进社会主义文化强国建设。

关键词：习近平文化大省文化强国浙江

Caveolin‑1 is critical for hepatic iron storage capacity in the development of nonalcoholic fatty liver disease

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Military Medical Research 2024年第2期11卷 206-227页

作者： Guang-Hui Deng Chao-Feng Wu Yun-Jia Li hao Shi Wei-Chao Zhong mu-Keng Hong Jun-Jie Li Jia-Min Zhao Chang Liu Meng-Chen Qin Zhi-Yun Zeng Wei-Min Zhang Ken Kin Lam Yung Zhi-Ping Lv Lei Gao Department of Gastroenterology Integrated Hospital of Traditional Chinese MedicineSouthern Medical UniversityGuangzhou 510315China School of Traditional Chinese Medicine Southern Medical UniversityGuangzhou 510515China Department of Hepatology Cancer CenterIntegrated Hospital of Traditional Chinese MedicineSouthern Medical UniversityGuangzhou 510315China Shenzhen Traditional Chinese Medicine Hospital Shenzhen 518033GuangdongChina Department of Biology Hong Kong Baptist UniversityKowloon TongKowloonHong Kong SAR 999077China

Background:Nonalcoholic fatty liver disease(NAFLD)is associated with disordered lipid and iron *** previous study has substantiated the pivotal role of Caveolin-1(Cav-1)in protecting hepatocytes and mediating iron metabolism in the *** study aimed to explore the specific mechanisms underlying the regulation of iron metabolism by Cav-1 in ***:Hepatocyte-specific Cav-1 overexpression mice and knockout mice were used in this ***-1-knockdown of RAW264.7 cells and mouse primary hepatocytes were performed to verify the changes in ***,a high-fat diet and palmitic acid plus oleic acid treatment were utilized to construct a NAFLD model in vivo and in vitro,respectively,while a high-iron diet was used to construct an in vivo iron overload ***,iron concentration,the expression of Cav-1 and iron metabolism-related proteins in liver tissue or serum were detected using iron assay kit,Prussian blue staining,Western blotting,immunofluorescence staining,immunohistochemical staining and *** related indicators of lipid metabolism and oxidative stress were evaluated by the corresponding reagent kit and ***:Significant disorder of lipid and iron metabolism occurred in *** expression of Cav-1 was decreased in NAFLD hepatocytes(Pmulation in the liver,which was contrary to the effect of Cav-1 in *** correlations were also observed between the serum Cav-1 concentration and the serum iron-related protein levels in NAFLD patients and healthy volunteers(P<0.05).Conclusions:These findings confirm that Cav-1 is an essential target protein that reg

关键词： Caveolin-1 Nonalcoholic fatty liver disease Iron metabolism Ferritin Oxidative stress

长江经济带跨界污染协同治理动力机制分析——基于扎根理论

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生态经济 2024年第4期40卷 175-184页

作者：陈芳郝婧安徽大学经济学院安徽合肥230601 安徽大学创新发展战略研究院安徽合肥230601

传统的“政府单核”思维和单一的属地治理模式已无法有效回应跨界污染问题,以“多元共治、区域合作、协调对话”为主要方式的协同治理更加符合当下的治理需求。立足于长江经济带,通过对跨界污染事件报道的扎根分析,构建了协同治理动力... 详细信息

传统的“政府单核”思维和单一的属地治理模式已无法有效回应跨界污染问题,以“多元共治、区域合作、协调对话”为主要方式的协同治理更加符合当下的治理需求。立足于长江经济带,通过对跨界污染事件报道的扎根分析,构建了协同治理动力机制模型,提炼出外源驱动、内生驱动、多元共治、赋能建设、思想引导和流程优化六个主导要素,进一步归纳为驱动力、能动力和执行力三维动力,分别作用于协同意愿、协同结构和协同过程三个阶段。利用模型对跨界污染事件进行回溯分析后发现,当前长江经济带跨界污染协同治理总体上存在驱动力失衡、能动力不足和执行力有限的问题,应结合具体实际有的放矢地予以强化。

关键词：协同治理动力机制跨界污染扎根理论长江经济带

Design and testing research of LiDAR for detecting atmospheric turbulence

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Optoelectronics Letters 2024年

作者： QIU Duoyang LI Xianyang YANG hao ZHU Xiaomeng fang Zhiyuan XU Xiang School of Advanced Manufacturing Engineering， Hefei University Anhui Provincial Engineering Technology Research Center of Intelligent Vehicle Control and Integrated Design Technology， Hefei University Science Island Branch of Graduate School， University of Science and Technology of China School of Mechanical and Energy Engineering， Ningbo Tech University Key Laboratory of Atmospheric Optics， Anhui Institute of Optics and Fine Mechanics， Chinese Academy of Sciences

Atmospheric turbulence is an important parameter affecting laser atmospheric transmission. This paper reports on a self-developed atmospheric turbulence detection LiDAR system (scanning DIM-LiDAR system). By designing and simulating the optical system of atmospheric turbulence detection LiDAR， the basic optical imaging accuracy has been determined; By designing through electronics， the delay and gating time jitter of the system are kept within a small range， ensuring the accuracy of the sampling thickness of the optical column. The comparison observation results between the scanning DIM-LiDAR system and the ultrasonic anemometer show that both have the same trend of change， and the error is small. Long term observation results indicate that the scanning DIM-LiDAR developed based on optical and electronic design can effectively detect atmospheric turbulence profiles. This article can provide theoretical and experimental basis for subsequent related research.

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