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Zircon U-Pb geochronologic,geochemical and Sr-Nd-Pb isotope characteristics of the Beidaban granites in the North Qilian Orogenic Belt:Petrogenesis and tectonic implications

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Acta Geochimica 2024年第6期43卷 1087-1104页

作者： Tao Yang zhi-yuan Sun Ming-liang Wang Xiao-qiang zhu Jing-yu Zhao The First Institute of Geology and Mineral Exploration Gansu Provincial Bureau of Geology and Mineral ExplorationTianshui 741020China School of Resources and Civil Engineering Suzhou UniversitySuzhou 234000China School of Geography and Tourism Anhui Normal UniversityWuhu 241000China

The tectonic evolution and crustal accretion process of the North Qilian Orogenic Belt(NQOB)are still under debate because of a lack of integrated constraints,especially the identifi cation of the tectonic transition from arc to initial *** we present results from zircon U-Pb geochronology,whole-rock geochemistry,and Sr-Nd-Pb isotope geochemistry of the Beidaban granites to provide crucial information for geodynamic evolution of *** U-Pb dating yields an age of 468±10 Ma for the Beidaban granites and most of the Beidaban samples contain amphibole,are potassium-rich,and have A/CNK values ranging from 0.7 to 0.9,illustrating that the Middle Ordovician Beidaban granites are K-rich,metaluminous,calc-alkaline *** geochemical characteristics indicate that the Beidaban granites are transitional I/S-type granitoids that formed in an arc *** isotopic compositions of initial(87 Sr/86 Sr)i values ranging from 0.70545 to 0.71082(0.70842 on average)andεNd(t)values ranging from−10.9 to−6.7(−8.8 on average)with two-stage Nd model ages(T DM2)of 1.74-2.08 Ga suggest that the Beidaban granites originated from Paleoproterozoic crustal *** addition,the initial Pb isotopic compositions(^(206)Pb/^(204)Pb=19.14-20.26;^(207)Pb/^(204)Pb=15.71-15.77;^(208)Pb/^(204)Pb=37.70-38.26)and geochemical features,such as high Th/Ta(17.43-30.12)and Rb/Nb(6.01-15.49)values,suggest that the Beidaban granite magma source involved recycled crustal components with igneous *** on these results in combination with previously published geochronological and geochemical data from other early Paleozoic igneous rocks,we suggest that the timing of the tectonic transition from arc to the initial collision to the fi nal closure of the North Qilian Ocean can be constrained to the Middle-Late Ordovician(ca.468–450 Ma).

关键词： Granitoids Zircon U-Pb dating Sr-Nd-Pb-isotopes Petrogenesis North Qilian Orogenic Belt

Structural and microwave absorption properties of CoFe_(2)O_(4)/residual carbon composites

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 221-232页

作者： Yuanchun Zhang Shengtao Gao Xingzhao Zhang Dacheng Ma Chuanlei zhu Jun He Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining Anhui University of Science and TechnologyHuainan 232001China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China

Electromagnetic interference,which necessitates the rapid advancement of substances with exceptional capabilities for bsorbing electromagnetic waves,is of urgent concern in contemporary *** this work,CoFe_(2)O_(4)/residual carbon from coal gasification fine slag(CFO/RC)composites were created using a novel hydrothermal *** mechanisms for microwave absorption,including conductive loss,natural resonance,interfacial dipole polarization,and magnetic flux loss,are involved in these ***,compared with pure residual carbon materials,this composite offers superior capabilities in microwave *** 7.76GHz,the CFO/RC-2 composite achieves an impressive minimum reflection loss(RL_(min))of-43.99 dB with a thickness of 2.44 ***,CFO/RC-3 demonstrates an effective absorption bandwidth(EAB)of up to 4.16 GHz,accompanied by a thickness of *** study revealed the remarkable capability of the composite to diminish electromagnetic waves,providing a new generation method for microwave absorbing materials of superior quality.

关键词： coal gasification slag residual carbon hydrothermal method microwave absorption CoFe_(2)O_(4)

Cognition-Driven Traffic Simulation for Unstructured Road Networks

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Journal of Computer Science & Technology 2020年第4期35卷 875-888页

作者： Hua Wang Xiao-Yu He Liu-Yang Chen Jun-Ru Yin Li Han Hui liang Fu-Bao zhu Rui-Jie zhu zhi-Min Gao Ming-liang Xu School of Information Engineering Zhengzhou UniversityZhengzhou 450001China School of Computer and Communication Engineering Zhengzhou University of Light IndustryZhengzhou 450002China School of Software Zhengzhou University of Light IndustryZhengzhou 450002China

Dynamic changes of traffic features in unstructured road networks challenge the scene-cognitive abilities of drivers,which brings various heterogeneous traffic *** traffic with these heterogeneous behaviors would have significant impact on realistic traffic *** existing traffic methods generate traffic behaviors by adjust-ing parameters and cannot describe those heterogeneous traffic flows in *** this paper,a cognition-driven traffic-simulation method inspired by the theory of cognitive psychology is *** first present a visual-filtering model and a perceptual-information fusion model to describe drivers'heterogeneous cognitive ***,logistic regression is used to model drivers'heuristic decision-making processes based on the above cognitive ***,we apply the high-level cognitive decision-making results to low-level traffic *** experimental results show that our method can provide realistic simulations for the traffic with those heterogeneous behaviors in unstructured road networks and has nearly the same efficiency as that of existing methods.

关键词： unstructured road network traffic simulation cognition-driven heterogeneous

应为、难为与可为:新时期乡村教师新乡贤角色承担的多维分析

维普期刊数据库评论

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黄冈师范学院学报 2025年第1期45卷 76-82页

作者：朱广兵辛治洋马鞍山师范高等专科学校安徽和县238200 安徽师范大学教育科学学院安徽芜湖241000

通过对乡村教师在乡村建设中的历史经验和现代实践进行系统梳理,发现学术界关于乡村教师与乡村社区治理之间关系的探讨主要可归纳为三种视角:乡村教师治村论、治教论以及助村论。在美丽乡村建设的背景下,乡村教师被赋予了新乡贤角色,这... 详细信息

通过对乡村教师在乡村建设中的历史经验和现代实践进行系统梳理,发现学术界关于乡村教师与乡村社区治理之间关系的探讨主要可归纳为三种视角:乡村教师治村论、治教论以及助村论。在美丽乡村建设的背景下,乡村教师被赋予了新乡贤角色,这一角色以乡建精英和文化使者的身份为标志,同时新乡贤角色的扮演亦能促进乡村青年教师的专业成长。然而,在实际工作中,乡村教师在扮演新乡贤角色时遭遇了角色定位模糊、工作负担过重以及能力单一等多重障碍。为促进乡村教师有效实现新乡贤角色的内生型构建,本研究认为需从教育管理的顶层设计、师范教育中的专业培训以及教师履职过程中的主观能动性三个层面着手,提供相应的支持与改进措施。

关键词：乡村教师新乡贤角色乡村振兴乡村文化乡村教育

Deep original information preservation by applying in-situ film formation technology during coring

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Petroleum Science 2022年第3期19卷 1322-1333页

作者： liang-Yu zhu Tao Liu zhi-Yu Zhao Yi-Fan Wu Dong-Sheng Yang Xiang-Chao Shi zhi-Qiang Liu Fei-Fei Lu Pei Qin Xiao-liang Gao State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu610065SichuanChina College of Polymer Science and Engineering Sichuan UniversityChengdu610065China Zaoshenzhuang Village Hancheng TowuLubei DistrictTangshan064002HebeiChina Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077China State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization Pingdingshan467000China Institute of Coal Mining and Utilization Pingdingshan Tianan Coal Mining Co.LTD.Pingdingshan467000China

Accurately obtaining the original information of an in-situ rock via coring is a significant guiding step for exploring and developing deep oil and gas *** is difficult for traditional coring technology and equipment to preserve the original information in deep *** study develops a technology for insitu substance-preserved(ISP),moisture-preserved(IMP),and light-preserved(ILP)*** technology stores the original information in real time by forming a solid sealing film on the in-situ sample during *** study designed the ISP-IMP-ILP-Coring process and *** addition,an ISP-IMP-ILPCoring process simulation system was *** effects of temperature,pressure,and film thickness on the quality of the in-situ film were investigated by performing in-situ film-forming simulation experiments.A solid sealing film with a thickness of 2-3 mm can be formed;it completely covers the core sample and has uniform *** film maintains good ISP-IMP-ILP properties and can protect the core sample in the in-situ environment *** study verifies the feasibility of“film formation during coring”technology and provides strong support for the engineering application of ISP-IMP-ILPCoring technology.

关键词： Deep resource exploitation Original information ISP-IMP-ILP-Coring Solid sealing film In-situ film-forming Film formation during coring

Internal ballistic simulation of multi-burning-rate solid rocket motor based on parameterized feature CAD modelInternal ballistic simulation of multi-burning-rate solid rocket motor based on parameterized feature CAD model

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航空动力学报 2015年第12期30卷 3017-3028页

作者： CHEN Wei liang Guo-zhu School of Astronautics Beijing University of Aeronautics and Astronautics

Internal ballistic simulation(IBS)method of multi-burning-rate solid rocket motor(SRM)was developed based on 3-D burning regression method by parameterized feature CAD model(PFCADM)and lumped parameter,in consideration of time-dependent,erosive-burning-effect from internal ballistic numerical *** driving multi-parameter CAD model based on PFCADM,the approach is capable of conducting the geometric regression simulation of various grain combinations of complex configurations with different burning *** suitably simplifying the internal ballistic numerical algorithm,the problems of coupling geometric regression simulation of sub-grains of different burning rates and high computational consumption of internal ballistic calculation were *** tri-burning-rate grain motor,which had been firing-tested,was used as the validation case of *** results show that,with the 3-D grain regression model and sufficient accurate internal ballistic algorithm,the method realizes IBS of the case in low computationalconsumption prediction of its performance within the accuracy of 2% during *** application of the method provides a practical approach to aid SRM design of multi-burning-rate grain.

关键词： solid rocket motor internal ballistic simulatio multi-burning-rate grain design unsteady flow

Removal of cadmium using MnO_2 loaded D301 resin

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Journal of Environmental Sciences 2007年第6期19卷 652-656页

作者： zhu zhi-liang MA Hong-mei ZHANG Rong-hua GE Yuan-xin ZHAO Jian-fu Key Laboratory of Yangtze Aquatic Environment of Ministry of Education State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China

MnO2 loaded weak basic anion exchange resin D301 （Anion exchange resin, macroreticular weak basic styrene） as adsorbent has been prepared and applied to the removal of cadmium. The adsorption characteristics have been investigated with respect to effect of pH, equilibrium isotherms, removal kinetic data, and interference of the coexisting ions. The results indicated that the Cd^2＋ could be efficiently removed using MnO2 loaded D301 resin in the pH range of 3-8 from aqueous solutions with the co-existence of high concentration of alkali and alkaline-earth metals ions. The saturate adsorption capacity of the Cd^2＋ was 77.88 mg/g. The adsorption process followed the pseudo first-order kinetics. The equilibrium data obtained in this study accorded excellently with the Langmuir adsorption isotherm.

关键词： cadmium kinetics adsorption loaded resin removal

ONE-STEP PROCESS TO MAKE ELECTRICALLY CONDUCTIVE THERMOPLASTIC VULCANIZATES FILLED WITH MWCNTs

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Chinese Journal of Polymer Science 2012年第1期30卷 138-142页

作者： Hao-sheng Wang Xiao-hong Zhang Yi-lei zhu zhi-hai Song Jin-liang Qiao College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China SINOPEC Beijing Research Institute of Chemical Industry Beijing 100013 China

Electrically conductive thermoplastic vulcanizates（TPVs） filled by multi-walled carbon nanotubes（MWCNTs） are prepared by a simple one-step melt mixing process,based on linear low density polyethylene（LLDPE） and ultrafme full-vulcanized rubber particles（UFRP）.An ideal morphology with controlled localization of MWCNTs in continuous LLDPE matrix and appropriate size of finely-dispersed UFRP can be achieved at the same *** controlled localization of MWCNTs in the continuous phase facilitates the formation of conductive pathway,and thus the volume resistivity of the as-prepared LLDPE/UFRP/MWCNTs thermoplastic vulcanizates is significantly *** results show that both the blend ratio of LLDPE/UFRP and the loading of MWCNTs have remarkable effect on the volume ***, the electrically conductive TPVs exhibit good mechanical properties duo to the fine dispersion of UFRP in *** added MWCNTs are capable of imparting reinforcement effects to thermoplastic vulcanizates with just a slight loss of stretchability and elasticity.

关键词： Thermoplastic vulcanizates Multi-walled carbon nanotubes Ultrafine full-vulcanized rubber particles Volume resistivity Mechanical properties

Non-coding RNAs in acute ischemic stroke:from brain to periphery

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Neural Regeneration Research 2025年第1期20卷 116-129页

作者： Shuo Li Zhaohan Xu Shiyao Zhang Huiling Sun Xiaodan Qin Lin zhu Teng Jiang Junshan Zhou Fuling Yan Qiwen Deng Department of Neurology Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu ProvinceChina Department of Neurology Zhongda HospitalSchool of MedicineSoutheast UniversityNanjingJiangsu ProvinceChina General Clinical Research Center Nanjing First HospitalNanjing Medical UniversityNanjingJiangsu ProvinceChina

Acute ischemic stroke is a clinical emergency and a condition with high morbidity,mortality,and *** predictive,diagnostic,and prognostic biomarkers and effective therapeutic targets for acute ischemic stroke remain *** innovations in high-throughput gene sequencing analysis,many aberrantly expressed non-coding RNAs(ncRNAs)in the brain and peripheral blood after acute ischemic stroke have been found in clinical samples and experimental *** expressed ncRNAs in the post-stroke brain were demonstrated to play vital roles in pathological processes,leading to neuroprotection or deterioration,thus ncRNAs can serve as therapeutic targets in acute ischemic ***,distinctly expressed ncRNAs in the peripheral blood can be used as biomarkers for acute ischemic stroke prediction,diagnosis,and *** particular,ncRNAs in peripheral immune cells were recently shown to be involved in the peripheral and brain immune response after acute ischemic *** this review,we consolidate the latest progress of research into the roles of ncRNAs(microRNAs,long ncRNAs,and circular RNAs)in the pathological processes of acute ischemic stroke–induced brain damage,as well as the potential of these ncRNAs to act as biomarkers for acute ischemic stroke prediction,diagnosis,and *** from this review will provide novel ideas for the clinical application of ncRNAs in acute ischemic stroke.

关键词： acute ischemic stroke apoptosis blood–brain barrier damage circular RNAs excitatory toxicity long non-coding RNAs microRNAs neuroinflammation non-coding RNAs oxidative stress