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气候变化下青藏高原中亚紫菀木潜在适生区的时空动态变化

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生态学杂志 2024年第6期43卷 1566-1575页

作者：李政升马玉寿李有鑫刘颖王彦龙王辛有青海大学青海省畜牧兽医科学院青海省高寒草地适应性管理重点实验室青海省青藏高原优良牧草种质资源利用重点实验室西宁810016 青海煤炭地质勘查院西宁810016

青藏高原在全球气候变化背景下展现出高度生态敏感性及脆弱性,而对其典型优势种的适生区时空动态进行预测既是实行生态恢复的前提,也能为制定保护对策提供依据。本研究以青藏高原温性荒漠草原的优势种中亚紫菀木(Asterothamnus centrali... 详细信息

青藏高原在全球气候变化背景下展现出高度生态敏感性及脆弱性,而对其典型优势种的适生区时空动态进行预测既是实行生态恢复的前提,也能为制定保护对策提供依据。本研究以青藏高原温性荒漠草原的优势种中亚紫菀木(Asterothamnus centraliasiaticus)为对象,基于MaxEnt模型,结合82条中亚紫菀木在青藏高原的有效分布记录和筛选后的6个生物气候变量,模拟预测中亚紫菀木在历史(全新世中期)、当前及未来4种气候排放浓度情景下的潜在分布区,并结合气候因子的贡献率及刀切法检验来分析制约中亚紫菀木地理分布的重要气候因子。结果表明:温度变量是影响青藏高原中亚紫菀木地理分布的主要气候限制因素,而降水变量是影响中亚紫菀木潜在地理分布的辅助生物气候变量;适合中亚紫菀木生长的最暖月最高温度(Bio5)范围为16.5~38.5℃,最暖季降水(Bio18)变化范围为55.0~1885.5 mm;从全新世中期到当前阶段是青藏高原中亚紫菀木种群扩张阶段,其种群主要聚集在青藏高原东北缘干旱半干旱地区;从当前到未来阶段,中亚紫菀木总适生区变化呈“先增加后降低”趋势,但中、高适生区却呈直线下降趋势;此外,中亚紫菀木在未来有逐渐向东迁移趋势。综合分析表明,在全球气候变化背景下,中亚紫菀木在青藏高原范围内的生存繁殖仍存在较大挑战。可根据其迁移趋势建立相关合理保护利用措施,以保持中亚紫菀木栖息地的连续性。

关键词：青藏高原温性荒漠草原中亚紫菀木 MaxEnt模型适生区分布

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积极老龄化背景下我国老年教育的研究现状与趋势——基于2014—2023年CNKI数据库的文献分析

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继续教育研究 2024年第9期 55-61页

作者：杨晓帆张宏伟王新友甘肃开放大学终身教育研究所甘肃兰州730030

借助中国知网(CNKI)的中文数据库,通过知识可视化及文献计量方法,聚焦2014—2023年我国老年教育研究;从发文情况,研究主题,学科与研究层次,作者、发文机构及基金,高被引文献分析等五个方面探讨了该研究领域现状。发现近十年老年教育研... 详细信息

借助中国知网(CNKI)的中文数据库,通过知识可视化及文献计量方法,聚焦2014—2023年我国老年教育研究;从发文情况,研究主题,学科与研究层次,作者、发文机构及基金,高被引文献分析等五个方面探讨了该研究领域现状。发现近十年老年教育研究以“老年大学”“社区教育”“终身教育”为主题,围绕内涵、成效、问题及趋势等方面开展;虽已形成以华东地区为核心的研究机构群,但存在核心作者群尚未形成、地区研究不平衡、基础性深层次研究欠缺等问题。并从实证研究、代际教育、媒介素养教育、多学科交融等方面对积极老龄化背景下我国老年教育发展趋势进行了展望,以期为该领域的深入全面研究提供一定的依据与参考,从而逐步推进具有中国特色的人口老龄化发展道路。

关键词：积极老龄化老年教育可视化分析研究趋势研究综述

RECQL4在胃癌中的表达及其与预后、免疫细胞浸润水平、药物敏感性之间的关系

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消化肿瘤杂志（电子版） 2024年第1期16卷 50-57页

作者：姜德培钟剑锋张伟康胡志耀文学王新友陈泓磊中山大学附属第八医院(深圳福田)消化内镜中心广东深圳518033 中山大学附属第六医院胃外科广东广州510655

目的探究RECQL4在胃癌组织中的表达情况,并研究其与预后、免疫细胞浸润水平以及药物敏感性之间的关系。方法通过TIMER 2.0数据库分析RECQL4在不同肿瘤中的表达差异性。通过GEPIA2数据库、GEO数据库分析RECQL4在胃癌组织中的表达水平。通... 详细信息

目的探究RECQL4在胃癌组织中的表达情况,并研究其与预后、免疫细胞浸润水平以及药物敏感性之间的关系。方法通过TIMER 2.0数据库分析RECQL4在不同肿瘤中的表达差异性。通过GEPIA2数据库、GEO数据库分析RECQL4在胃癌组织中的表达水平。通过Kaplan-Meier plotter数据库对RECQL4在胃癌患者预后中的价值进行生存分析评估。通过TIMER 2.0数据库评估RECQL4的表达与免疫细胞浸润水平的相关性。应用RNAactDrug数据库揭示RECQL4分子与药物敏感性之间的关系。结果RECQL4在胃癌、结直肠癌、食管癌等肿瘤组织中高表达;RECQL4的高表达与胃癌的较差预后相关。胃癌中RECQL4 mRNA表达水平与B细胞、CD8+T细胞、CD4^(+)T细胞、树突状细胞、中性粒细胞及巨噬细胞浸润水平呈负相关。治疗胃癌的常用药物伊立替康、5-氟尿嘧啶、紫杉醇及多西他赛的敏感性均与RECQL4相关。结论RECQL4在胃癌组织中高表达,且可能与多种化疗药物敏感性相关,可作为预后不良的标志物。RECQL4高表达可抑制免疫细胞浸润,可能参与了肿瘤的免疫逃逸,促进肿瘤发展。

关键词：胃癌解旋酶临床预后免疫浸润药物敏感性

BLM基因与胃癌免疫浸润水平及临床预后的相关性分析

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消化肿瘤杂志（电子版） 2024年第2期16卷 194-200页

作者：张伟康胡志耀钟剑锋姜德培文学王新友陈泓磊中山大学附属第八医院(深圳福田)消化内镜中心广东深圳518033 中山大学附属第六医院胃外科广东广州510655

目的探讨BLM基因与胃癌组织中免疫细胞浸润水平及患者预后的关系。方法通过TIMER数据库分析BLM基因在不同恶性肿瘤中的表达水平差异,并应用GEPIA数据库验证BLM基因在胃癌组织中的表达水平。对胃癌组织芯片(STC1602)进行免疫组织化学分析... 详细信息

目的探讨BLM基因与胃癌组织中免疫细胞浸润水平及患者预后的关系。方法通过TIMER数据库分析BLM基因在不同恶性肿瘤中的表达水平差异,并应用GEPIA数据库验证BLM基因在胃癌组织中的表达水平。对胃癌组织芯片(STC1602)进行免疫组织化学分析,并对比胃癌组织和正常胃黏膜组织BLM免疫组织化学结果,进一步验证BLM在胃癌组织中的表达差异。通过Kaplan-MeierPlotter数据库对BLM基因与胃癌患者的生存预后关系进行评估。利用TIMER数据库分析了BLM基因在胃癌组织中的表达与免疫细胞浸润水平的相关性。从基因表达综合数据库中获取了GSE84433和GSE62254胃癌数据集,进行了单样本基因集富集分析,以验证BLM基因的高表达是否会影响胃癌组织中免疫细胞的浸润水平。结果BLM基因在胃癌、结直肠癌、食管癌等恶性肿瘤组织中均高表达。BLM基因高表达水平的胃癌患者的总生存和首次进展后生存均较差。胃癌组织中BLM基因的mRNA表达水平与CD8^(+)T细胞、CD4^(+)T细胞、巨噬细胞、中性粒细胞及树突状细胞的浸润水平呈负相关。结论BLM基因在胃癌组织中高表达,BLM基因的表达与胃癌组织中的免疫细胞浸润水平呈负相关,BLM基因可作为评估胃癌患者预后的标志物。

关键词：胃癌 BLM基因临床预后免疫浸润

An Innovation of Evaluation and Design of Vehicle Acceleration Sound Based on EEG Signals

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Journal of Bionic Engineering 2024年第1期21卷 344-361页

作者： Liping Xie xinyou Lin Wan Chen Zhien Liu Yawei Zhu College of Mechanical Engineering&Automation Fuzhou UniversityFuzhou 350108China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of TechnologyWuhan 430070China

There is a bottleneck in the design of vehicle sound that the subjective perception of sound quality that combines multiple psychological factors fails to be accurately and objectively ***,EEG signals are introduced in this paper to investigate the evaluation and design method of vehicle acceleration sound with powerful sound ***,the experiment of EEG acquisition and subjective evaluation under the stimulation of powerful vehicle sounds is conducted,respectively,then three physiological EEG features of PSD_β,PSD_γand DE are constructed to evaluate the vehicle sounds based on the correlation analysis ***,the Adaptive Genetic Algorithm(AGA)is proposed to optimize the Elman model,where an intelligent model(AGA–Elman)is constructed to objectively predicate the perception of subjects for the vehicle sounds with powerful sound *** results demonstrate that the error of the constructed AGA–Elman model is only 2.88%,which outperforms than the traditional BP and Elman model;Finally,two vehicle acceleration sounds(Design1 and Design2)are designed based on the constructed AGA–Elman model from the perspective of order modulation and frequency modulation,which provide the acoustic theoretical guidance for the design of vehicle sound incorporating the EEG signals.

关键词： EEG signal Brain activity analysis Vehicle sound design Adaptive genetic algorithm-Elman model

Alleviating the anisotropic microstructural change and boosting the lithium ions diffusion by grain orientation regulation for Ni-rich cathode materials

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Journal of Energy Chemistry 2024年第1期88卷 213-222,I0005页

作者： xinyou He Shilin Su Bao Zhang Zhiming Xiao Zibo Zhang Xing Ou Engineering Research Center of the Ministry of Education for Advanced Battery Materials School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083HunanChina Zhejiang Power New Energy Co.Ltd Zhuji 311899ZhejiangChina

Generally,layered Ni-rich cathode materials exhibit the morphology of polycrystalline secondary sphere composed of numerous primary *** the arrangement of primary particles plays a very important role in the properties of Ni-rich *** disordered particle arrangement is harmful to the cyclic performance and structural stability,yet the fundamental understanding of disordered structure on the structural degradation behavior is ***,we have designed three kinds of LiNi_(0.83)Co_(0.06)Mn_(0.11)O_(2) cathode materials with different primary particle orientations by regulating the precursor coprecipitation *** finite element simulation and in-situ characterization,the Li^(+)transport and structure evolution behaviors of different materials are ***,the smooth Li^(+)diffusion minimizes the reaction heterogeneity,homogenizes the phase transition within grains,and mitigates the anisotropic microstructural change,thereby modulating the crack evolution ***,the optimized structure evolution ensures radial tight junctions of the primary particles,enabling enhanced Li^(+)diffusion during dynamic ***-loop bidirectional enhancement mechanism becomes critical for grain orientation regulation to stabilize the cyclic *** precursor engineering with particle orientation regulation provides the useful guidance for the structural design and feature enhancement of Ni-rich layered cathodes.

关键词： Ni-rich cathode Grain orientation regulation Anisotropic microstructural change Precursor engineering Li~+-ions diffusion

Defect-mode and Fabry-Perot resonance induced multi-band nonreciprocal thermal radiation

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Science China Technological Sciences 2024年第8期67卷 2405-2412页

作者： CHEN ZiHe YU ShiLv YUAN Cheng CUI xinyou HU Run School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan Fiberhome Fuhua Electric Co. Ltd.

According to Kirchhoff's radiation law, the spectral-directional absorptivity(α) and spectral-directional emissivity(e) of an object are widely believed to be identical, which places a fundamental limit on photonic energy conversion and *** introduction of Weyl semimetals and magneto-optical(MO) materials into photonic crystals makes it possible to violate Kirchhoff's law, but most existing work only report the unequal absorptivity and emissivity spectra in a single band, which cannot meet the requirements of most practical applications. Here, we introduce a defect layer into the structure composed of one-dimensional(1D) magnetophotonic crystal and a metal layer, which realizes dual-band nonreciprocal thermal radiation under a 3-T magnetic field with an incident angle of 60°. The realization of dual-band nonreciprocal radiation is mainly due to the Fabry-Perot(FP) resonance occurring in the defect layer and the excitation of Tamm plasmon, which is proved by calculating the magnetic field distribution. In addition, the effects of incident angle and structural parameters on nonreciprocity are also *** is more, the number of nonreciprocal bands could be further increased by tuning the defect layer thickness. When the defect layer thickness increases to 18.2 μm, tri-band nonreciprocal thermal radiation is realized due to the enhanced number of defect modes in the photonic band gap and the FP resonance occurring in the defect layer. Finally, the effect of defect location on nonreciprocity is also discussed. The present work provides a new way for the design of multi-band or even broad-band nonreciprocal thermal emitters.

关键词： Kirchhoff’s law multi-band nonreciprocal thermal radiation magnetophotonic crystal Tamm plasmon defect layer Fabry-Perot resonance

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Understanding the failure mechanism towards developing high-voltage single-crystal Ni-rich Co-free cathodes

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Green Energy & Environment 2024年第6期9卷 1045-1057页

作者： Jixue Shen Bao Zhang Changwang Hao Xiao Li Zhiming Xiao xinyou He Xing Ou Engineering Research Center of the Ministry of Education for Advanced Battery Materials School of Metallurgy and EnvironmentCentral South UniversityChangsha410083China Zhejiang Power New Energy Co. Ltd.Zhuji311899China Material Science and Chemistry Engineering College China University of GeosciencesWuhan430074China

Benefited from its high process feasibility and controllable costs,binary-metal layered structured LiNi_(0.8)Mn_(0.2)O_(2)(NM)can effectively alleviate the cobalt supply crisis under the surge of global electric vehicles(EVs)sales,which is considered as the most promising nextgeneration cathode material for lithium-ion batteries(LIBs).However,the lack of deep understanding on the failure mechanism of NM has seriously hindered its application,especially under the harsh condition of high-voltage without sacrifices of reversible ***,singlecrystal LiNi_(0.8)Mn_(0.2)O_(2) is selected and compared with traditional LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM),mainly focusing on the failure mechanism of Cofree cathode and illuminating the significant effect of Co element on the Li/Ni antisite defect and dynamic ***,the presence of high Li/Ni antisite defect in NM cathode easily results in the extremely dramatic H2/H3 phase transition,which exacerbates the distortion of the lattice,mechanical strain changes and exhibits poor electrochemical performance,especially under the high cutoff ***,the reaction kinetic of NM is impaired due to the absence of Co element,especially at the single-crystal ***,the negative influence of Li/Ni antisite defect is controllable at low current densities,owing to the attenuated ***,Co-free NM can exhibit better safety performance than that of NCM *** findings are beneficial for understanding the fundamental reaction mechanism of single-crystal Ni-rich Co-free cathode materials,providing new insights and great encouragements to design and develop the next generation of LIBs with low-cost and high-safety performances.

关键词： Li/Ni antisite defect Dynamic characteristic High-voltage Single-crystal Ni-rich Co-free cathodes Lithium-ion batteries

Quantifying source-sink relationships in leaf-color modified rice genotypes during grain filling

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Journal of Integrative Agriculture 2024年第9期23卷 2923-2940页

作者： Zhenxiang Zhou Paul CStruik Junfei Gu Peter E.L.van der Putten Zhiqin wang Jianchang Yang xinyou Yin Centre for Crop Systems Analysis Department of Plant SciencesWageningen University&ResearchWageningen 6700 AKThe Netherlands College of Agriculture Yangzhou UniversityYangzhou 225009China

Leaf-color modification can affect canopy photosynthesis,with potential effects on rice yield and yield *** source-sink relationships through crop management is often used to improve crop *** study investigated whether and how modifying leaf color alters source-sink relationships and whether current crop cultivation practices remain applicable for leaf-color modified *** collected data of total biomass and nitrogen(N)accumulation in rice genotypes of four genetic backgrounds and their leaf-color modified variants(greener or yellower)were analyzed,using a recently established modelling method to quantify the source-sink(im)balance during grain *** all leaf-color variants,only one yellower-leaf variant showed a higher source capacity than its normal *** was associated with greater post-flowering N-uptake that prolonged the functional leaf-N duration,and this greater post-flowering N-uptake was possible because of reduced pre-flowering N-uptake.A density experiment showed that current management practices(insufficient planting density accompanied by abundant N application)are unsuitable for the yellower-leaf genotype,ultimately limiting its yield ***-color modification affects source-sink relationships by regulating the N trade-off between pre-and post-flowering uptake,as well as N translocation between source and sink *** best exploit leaf-color modification for improving crop productivity,adjustments of crop management practices are required.

关键词： source-sink relationship biomass nitrogen Oryza sativa leaf-color modification