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甘肃白龙江亚高山4种主要灌木截留特征研究

陕西林业科技 2024年第2期52卷 31-33,54页

作者：韩卓频甘肃省洮河国家级自然保护区管护中心车巴保护站甘肃洮河730070

采用浸泡法和人工降雨测定甘肃南部白龙江4种不同灌丛最大截留量,初步探索叶片截留的影响因子.结果表明:(1)同一植物叶片采用人工降雨法其叶片最大截留量始终大于浸泡法,人工降雨法叶片最大截留量较浸泡法多5.84%~12.41%.(2)同一地区不... 详细信息

采用浸泡法和人工降雨测定甘肃南部白龙江4种不同灌丛最大截留量,初步探索叶片截留的影响因子.结果表明:(1)同一植物叶片采用人工降雨法其叶片最大截留量始终大于浸泡法,人工降雨法叶片最大截留量较浸泡法多5.84%~12.41%.(2)同一地区不同植物截留能力不同,白龙江4种主要灌丛叶片的最大截留能力从大到小依次是聚花荚蒾>绣线菊>箭竹>甘肃柳,最大截留量、基径、株高、叶面积呈正相关性,且截留能力越大,相关性越显著.

关键词：白龙江不同灌丛截留能力

Graphene/Molybdenum Dichalcogenide-Based van der Waals Heterostructure Photodetectors: a Review

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新型炭材料(中英文) 2024年

作者： ZHANG Xin-hua LIU Wei-Di GONG You-pin LIU Qing-feng CHEN Zhi-Gang Center of Quantum Materials and Devices at Institute of Advanced Interdisciplinary Studies Soft Matter and Interdisciplinary Research Center College of Physics Chongqing University School of Chemistry and Physic ARC Research Hub in Zero-emission Power Generation for Carbon Neutrality and Center for Materials Science Queensland University of Technology State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University

Graphene is widely used in photodetection due to its high carrier mobility and wide spectral absorption ***, the high dark current due to its low light absorption severely limits the performance of photodetection. Molybdenum dihalide(MoX2, X= S, Se and Te) has a high absorption coefficient, which can compensate high dark current in graphene-based photodetectors and result in outstanding photoelectronic properties in graphene/MoX2 van der Waals heterostructure(vdWH) *** this review, we firstly review working principles, performance indicators, and structures of photodetectors. After that, the significance of graphene/MoX2 vdWH photodetectors are highlighted from the material fundamental perspective. Preparation methodologies and performance enhancement strategies of graphene/MoX2 vdWH photodetectors are correspondingly summarized. In the end, we highlight the current challenges and future directions of the graphene/MoX2 vdWH photodetectors. This review will guide the design of high-performance vdWH photodetectors.

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General anesthetic agents induce neurotoxicity through astrocytes

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Neural Regeneration Research 2024年第6期19卷 1299-1307页

作者： Yanchang Yang Tiantian Liu Jun Li Dandan Yan Yuhan Hu pin Wu Fuquan Fang Patrick M.McQuillan Wenxin Hang Jianhang Leng Zhiyong Hu Department of Anesthesiology The First Affiliated Hospital Zhejiang University School of Medicine Department of Anesthesiology Ningbo Women and Children's Hospital 3. Department of Anesthesiology Shulan (Hangzhou) Hospital Affiliated to Zhejiang Shuren University Shulan International Medical College 4. Cell Biology Department Yale University 5. Department of Anesthesiology Penn State Hershey Medical Centre Penn State College of Medicine 6. Department of Central Laboratory Affiliated Hangzhou First People's Hospital Zhejiang University School of Medicine

Neuroscientists have recognized the importance of astrocytes in regulating neurological function and their influence on the release of glial transmitters. Few studies, however, have focused on the effects of general anesthetic agents on neuroglia or astrocytes. Astrocytes can also be an important target of general anesthetic agents as they exert not only sedative, analgesic, and amnesic effects but also mediate general anesthetic-induced neurotoxicity and postoperative cognitive dysfunction. Here, we analyzed recent advances in understanding the mechanism of general anesthetic agents on astrocytes, and found that exposure to general anesthetic agents will destroy the morphology and proliferation of astrocytes, in addition to acting on the receptors on their surface, which not only affect Ca2+signaling, inhibit the release of brain-derived neurotrophic factor and lactate from astrocytes, but are even involved in the regulation of the pro-and anti-inflammatory processes of astrocytes. These would obviously affect the communication between astrocytes as well as between astrocytes and neighboring neurons, other neuroglia, and vascular cells. In this review, we summarize how general anesthetic agents act on neurons via astrocytes, and explore potential mechanisms of action of general anesthetic agents on the nervous system. We hope that this review will provide a new direction for mitigating the neurotoxicity of general anesthetic agents.

关键词： astrocytes brain-derived neurotrophic factor general anesthetic agents neuron neurotoxicity N-methyl-D-aspartate receptor perioperative neurocognition Toll-like receptor γ-aminobutyric acid receptor

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数据抓取竞争互诉案件滥诉风险防范机制构建

海南开放大学学报 2024年第3期25卷 132-142页

作者：应品广郑嫒上海对外经贸大学国际组织学院(贸易谈判学院) 上海201600

因数据抓取引发的竞争互诉案件大量进入司法程序,引发滥诉的司法风险。既有司法案件表明,反不正当竞争与反垄断诉讼具有数量层失衡、主体层偏颇及结果层纠葛的特征,而现有滥诉机制鲜有基于风险防范视角,难以进行有效回应。目前竞争互诉... 详细信息

因数据抓取引发的竞争互诉案件大量进入司法程序,引发滥诉的司法风险。既有司法案件表明,反不正当竞争与反垄断诉讼具有数量层失衡、主体层偏颇及结果层纠葛的特征,而现有滥诉机制鲜有基于风险防范视角,难以进行有效回应。目前竞争互诉司法理念较为陈旧,管辖制度规定略显滞后,大小平台诉讼博弈失衡,竞争诉讼负向激励配置匮乏。以贯彻新时代能动司法为原则,诉前应探索竞争诉讼集中管辖机制,诉中应进行数据抓取行为正当性的综合认定,并建立正负向相结合的激励制度体系,并树立现代化的司法理念。

关键词：数据抓取数据竞争竞争互诉滥诉防范

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预处理温度对NiCoCrAlYHf涂层氧化行为及表面粗化机制的影响

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表面工程与再制造 2024年第1期24卷 61-62页

作者： Pan Li Xueling Fan pin Lu Han Wang Xiaochao Jin Xi'an Key Laboratory of Extreme Environmental and Protection Technology School of Aerospace Engineering Xi'an Jiaotong University Xi'an 710049 China

NiCoCrAlYHf涂层作为热障涂层体系中的粘结层已得到广泛应用,其服役过程中的氧化行为和表面粗化机制受预处理温度的影响较大。为明确预处理温度的影响,对预处理涂层和等温暴露涂层的特性进行了表征和分析,包括微观结构、重量变化、热生... 详细信息

NiCoCrAlYHf涂层作为热障涂层体系中的粘结层已得到广泛应用,其服役过程中的氧化行为和表面粗化机制受预处理温度的影响较大。为明确预处理温度的影响,对预处理涂层和等温暴露涂层的特性进行了表征和分析,包括微观结构、重量变化、热生长氧化物(TGO)厚度和表面粗糙度。

关键词：粗化机制热障涂层预处理温度表面粗糙度氧化行为 NiCoCrAlY 粘结层重量变化

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中华文明连续不断的历史逻辑与中国路径

学术研究 2024年第3期 1-7页

作者：李凭华南师范大学历史文化学院广东广州510631

中华文明是世界上独一无二的经5000年毫不断裂而长存至今的历史现象,以二十四史为脊梁的历史文献和层出不穷的考古遗存是不容置疑的铁证。中华文明毫不断裂的重要原因在于中华民族的勤劳勇敢,依靠勤劳而开天辟地,不畏强暴而驱逐豺狼,才... 详细信息

中华文明是世界上独一无二的经5000年毫不断裂而长存至今的历史现象,以二十四史为脊梁的历史文献和层出不穷的考古遗存是不容置疑的铁证。中华文明毫不断裂的重要原因在于中华民族的勤劳勇敢,依靠勤劳而开天辟地,不畏强暴而驱逐豺狼,才使得中华民族日益繁荣昌盛。中华民族具有的勤劳勇敢基因源自遥远的石器时代,是经历近百万年艰苦磨炼形成的,因此能够驱动中华文明持续发展。中华文明持续发展的现代意义在于,不但为世界文明树立了和平与文治的榜样,而且增强了中华民族自立于世界前列的信心。因此,应该努力贯彻“让中华优秀传统文化成为现代的”方针,尽力守护和发扬中华文明的传统。

关键词：中华民族中华文明历史文献考古资料

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统筹科技发展与科技安全的情报体系框架研究

情报学报 2024年第3期43卷 357-368页

作者：李品扬州大学社会发展学院扬州225009

统筹科技发展与科技安全已成为国家重要战略之一。情报体系作为科技战略咨询系统的重要组成部分,理应发挥其应有作用。构建支持统筹科技发展与科技安全的情报体系,需要相关理论的支撑。本文主要探索情报体系构建的理论问题。从统筹科技... 详细信息

统筹科技发展与科技安全已成为国家重要战略之一。情报体系作为科技战略咨询系统的重要组成部分,理应发挥其应有作用。构建支持统筹科技发展与科技安全的情报体系,需要相关理论的支撑。本文主要探索情报体系构建的理论问题。从统筹科技发展与科技安全内涵入手,探索情报体系的理论框架,深入系统地分析了理论框架中的保障系统、治理系统和运行系统三个要素。

关键词：科技发展科技安全统筹发展与安全情报任务情报体系

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论城市社会学的学科规范与研究定位

中州学刊 2024年第8期 83-90页

作者：张品天津社会科学院中国特色社会主义理论体系研究中心天津300191

不同于社会学通过分析城市所承载的社会发展进程来把握社会秩序,城市社会学认为社会秩序至少部分地来自城市及其内部活动,因而以城市内部特定社会过程研究作为学科建立的依据,并将城市定义为承载社会运行的人口聚落,与之相应的研究对象... 详细信息

不同于社会学通过分析城市所承载的社会发展进程来把握社会秩序,城市社会学认为社会秩序至少部分地来自城市及其内部活动,因而以城市内部特定社会过程研究作为学科建立的依据,并将城市定义为承载社会运行的人口聚落,与之相应的研究对象便是与社会组织息息相关的资源分配过程。为了实现城市经验与秩序理论的融会贯通,城市社会学采用“理想类型普遍化”的研究方法,对塑造城市空间形态的具体区位性资源配置过程的特殊性进行概括。在“个人与社会的关系”这一社会学基本问题的限定下,个人以占有城市区位性资源的方式融入社会就构成了城市社会学的基本问题。学科规范决定了城市社会学的研究任务是揭示社会如何通过城市实现组织化,其作为社会学分支学科的研究定位也是以组织化视角来探讨社会秩序。从城市社会学的研究经验可以看出,社会学分支学科不是简单地运用社会学的理论与方法来分析某一社会现象或问题,而是立足社会学关注的社会秩序问题,从具体类型的人类实践中发现新的研究问题,据此建构自身知识体系。

关键词：城市社会学学科规范研究定位

Staging liver fibrosis with various diffusion-weighted magnetic resonance imaging models

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World Journal of Gastroenterology 2024年第9期30卷 1164-1176页

作者： Yan-Li Jiang Juan Li Peng-Fei Zhang Feng-Xian Fan Jie Zou pin Yang Peng-Fei Wang Shao-Yu Wang Jing Zhang Department of Magnetic Resonance Imaging The Second Hospital&Clinical Medical SchoolLanzhou UniversityLanzhou 730030Gansu ProvinceChina Second Clinical School Lanzhou UniversityLanzhou 730030Gansu ProvinceChina Gansu Province Clinical Research Center for Functional and Molecular Imaging The Second Hospital&Clinical Medical SchoolLanzhou UniversityLanzhou 730030Gansu ProvinceChina Department of Hepatology The Second Hospital&Clinical Medical SchoolLanzhou UniversityLanzhou 730030Gansu ProvinceChina MR Scientific Marketing Siemens HealthineersXi’an 710065Shaanxi ProvinceChina

BACKGROUND Diffusion-weighted imaging(DWI)has been developed to stage liver ***,its diagnostic performance is inconsistent among ***,it is worth studying the diagnostic value of various diffusion models for liver fibrosis in one *** To evaluate the clinical potential of six diffusion-weighted models in liver fibrosis staging and compare their diagnostic *** This prospective study enrolled 59 patients suspected of liver disease and scheduled for liver biopsy and 17 healthy *** participants underwent multi-b value *** main DWI-derived parameters included Mono-apparent diffusion coefficient(ADC)from mono-exponential DWI,intravoxel incoherent motion model-derived true diffusion coefficient(IVIM-D),diffusion kurtosis imaging-derived apparent diffusivity(DKI-MD),stretched exponential model-derived distributed diffusion coefficient(SEM-DDC),fractional order calculus(FROC)model-derived diffusion coefficient(FROC-D)and FROC model-derived microstructural quantity(FROC-μ),and continuous-time random-walk(CTRW)model-derived anomalous diffusion coefficient(CTRW-D)and CTRW model-derived temporal diffusion heterogeneity index(CTRW-α).The correlations between DWI-derived parameters and fibrosis stages and the parameters’diagnostic efficacy in detecting significant fibrosis(SF)were assessed and *** CTRW-D(r=-0.356),CTRW-α(r=-0.297),DKI-MD(r=-0.297),FROC-D(r=-0.350),FROC-μ(r=-0.321),IVIM-D(r=-0.251),Mono-ADC(r=-0.362),and SEM-DDC(r=-0.263)were significantly correlated with fibrosis *** areas under the ROC curves(AUCs)of the combined index of the six models for distinguishing SF(0.697-0.747)were higher than each of the parameters alone(0.524-0.719).The DWI models’ability to detect SF was *** combined index of CTRW model parameters had the highest AUC(0.747).CONCLUSION The DWI models were similarly valuable in distinguishing SF in patients with liver *** combined index of CTRW paramet

关键词： Liver fibrosis Magnetic resonance imaging Diffusion-weighted magnetic resonance Liver biopsy Significant fibrosis