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Sedimentary Characteristics,Ages,and Environmental Significance of Gravel Deposits and Loess in Shandong,Eastern China:Regional Response to Global Change Since the Last Glacial Period

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 491-504页

作者： WANG Min KONG Fanbiao KONG Xianglun CHEN haitao WANG Jiawei MIAO Xiaodong JIA Guangju HAN Mei xu Shujian Department of Geography and Tourism Qilu Normal UniversityJinan 250014China School of Geography and Environment Shandong Normal UniversityJinan 250014China Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection Linyi UniversitySchool of Resources and EnvironmentLinyiShandong 276005China College of Earth Science and Engineering Shandong University of Science and TechnologyQingdaoShandong 266590China

Investigation of rarely studied gravel layers found in the loess in Shandong Province,eastern China,reveals the fabric characteristics of two gravel layers(G1,G2)and the sedimentary characteristics of loess at the typical and well-preserved Heiyu section(HY),where,to determine the paleoclimatic changes during Marine Isotope Stage *** stimulated luminescence dates of the HY formation range from 0.26±0.02 ka to 39.00±2.00 *** addition,the ages of G1 and G2 were estimated using the Bayesian model to be 39.60-40.50 and 29.00-29.50 ka.G1 and G2 are mainly composed of fine and medium gravel,both of which were subangular to subrounded limestone,with gravel directions to NE and *** average flow velocity,average depth,and flood peak flow of G1 are 1.10 m/s,0.49 m,and 37.04 m^(3)/s,respectively,calculated using the flow energy method,whereas those of G2 are 0.98 m/s,0.38 m,and 18.38 m^(3)/s,*** of climate proxy indices show that the sedimentary environment of the gravel and loess in HY might be a regional response to global change.

关键词： paleoenvironment geochronology gravel layer sedimentology Pleistocene Shandong Province

Nanocable catalysts MTe(M=Pt,PtCu)@UIO-67 for CO2 conversion

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Science China Materials 2020年第5期63卷 769-778页

作者： Huaqian Zhang haitao xu Yuanyuan Li Xinbo Pan Lishuang Li State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D LabChemical Engineering Research CenterEast China University of Science and TechnologyShanghai 200237China

Zr-based metal–organic framework nanocable catalysts comprising MTe(M=Pt,PtCu)@UIO-67 resembling"sugarcoated haws on a stick"were *** Te nanowires with diameters of about 8.48 nm served as a sacrificial template for the epitaxial growth of an outer M(Pt or PtCu)to obtain cable cores comprising MTe nanowires with good dispersity,which were then successfully encapsulated in the center of a monodisperse MTe@UIO-67 cable nanostructured *** electron microscopy(TEM),scanning electron microscopy(SEM),powder X-ray diffraction(XRD)and energy dispersive X-ray(EDX)element mapping were used to investigate the morphology,structure and composition of the nanocable *** types of catalysts were synthesized,and all of the catalysts demonstrated superior product selectivity to CO for reverse water-gas shift(RWGS)***,the morphology and dispersion of PtCuTe@UIO-67 nanocable catalyst can be maintained to some extent after catalysis at high temperature,and PtTe@UIO-67 catalyzed CO2 conversion was achieved with 99.86%CO selectivity.

关键词： metal-organic frameworks nanowires nanocable catalyst reverse water-gas shift reaction

研究型大学与地方性大学组织整合机制的比较研究

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高等工程教育研究 2014年第6期62卷 147-152页

作者：徐海涛华中科技大学教育科学研究院

本文在比较分析某研究型大学和某地方性大学具体案例的基础上,探讨了国内这两类大学在组织整合机制上的差异性,即:在中国高等教育系统这个金字塔结构中,位于金字塔塔尖的研究型大学,其组织整合机制越可能是以文化机制为主;位于金字塔中... 详细信息

本文在比较分析某研究型大学和某地方性大学具体案例的基础上,探讨了国内这两类大学在组织整合机制上的差异性,即:在中国高等教育系统这个金字塔结构中,位于金字塔塔尖的研究型大学,其组织整合机制越可能是以文化机制为主;位于金字塔中下层的地方性大学,其组织整合机制可能是科层机制的作用最大。最后从组织的角度具体分析了差异性产生的根源。

关键词：组织整合机制研究型大学地方性大学高等教育系统

Mitigating Lattice Distortion of High‑Voltage LiCoO_(2)via Core‑Shell Structure Induced by Cationic Heterogeneous Co‑Doping for Lithium‑Ion Batteries

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Nano-Micro Letters 2024年第3期16卷 169-182页

作者： Zezhou Lin Ke Fan Tiancheng Liu Zhihang xu Gao Chen Honglei Zhang Hao Li xuyun Guo Xi Zhang Ye Zhu Peiyu Hou haitao Huang Department of Applied Physics and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Department of Applied Physics The Hong Kong Polytechnic UniversityHong KongPeople’s Republic of China Institute of Nanosurface Science and Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics EngineeringShenzhen UniversityShenzhenPeople’s Republic of China School of Physics and Technology University of JinanJinanShandongPeople’s Republic of China

Inactive elemental doping is commonly used to improve the structural stability of high-voltage layered transition-metal oxide ***,the one-step co-doping strategy usually results in small grain size since the low diffusivity ions such as Ti^(4+)will be concentrated on grain boundaries,which hinders the grain *** order to synthesize large single-crystal layered oxide cathodes,considering the different diffusivities of different dopant ions,we propose a simple two-step multi-element co-doping strategy to fabricate core–shell structured LiCoO_(2)(CS-LCO).In the current work,the high-diffusivity Al^(3+)/Mg^(2+)ions occupy the core of single-crystal grain while the low diffusivity Ti^(4+)ions enrich the shell *** Ti^(4+)-enriched shell layer(~12 nm)with Co/Ti substitution and stronger Ti–O bond gives rise to less oxygen ligand ***-situ XRD demonstrates the constrained contraction of c-axis lattice parameter and mitigated structural *** a high upper cut-off voltage of 4.6 V,the single-crystal CS-LCO maintains a reversible capacity of 159.8 mAh g^(−1)with a good retention of~89%after 300 cycles,and reaches a high specific capacity of 163.8 mAh g^(−1)at *** proposed strategy can be extended to other pairs of low-(Zr^(4+),Ta^(5+),and W6+,etc.)and high-diffusivity cations(Zn^(2+),Ni^(2+),and Fe^(3+),etc.)for rational design of advanced layered oxide core–shell structured cathodes for lithium-ion batteries.

关键词： Lithium-ion battery LiCoO_(2) Heterogeneous co-doping Core-shell structure High-voltage stability

Demonstration of LDPC-coded PS-64QAM OFDM employing novel bit-class distribution matching in a W-band RoF system

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Chinese Optics Letters 2024年第8期22卷 35-40页

作者： haitao Zhao Bangning xu Wei xun Jianxin Ren Shuaidong Chen Long Zhang Li Zhao Bo Liu School of Communication and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China Institute of Optics and Electronics Nanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory for Information Science of Electromagnetic Waves Fudan UniversityShanghai 200433China

In this work,we proposed and experimentally demonstrated a novel probabilistic shaping(PS)64-ary quadrature amplitude modulation(QAM)orthogonal frequency division multiplexing(OFDM)with low-density parity-check(LDPC)-coded modulation in a W-band radio-over-fiber(RoF)system using envelope *** proposed PS scheme has the advantages of no complex multiplication and division operations and low hardware implementation *** our experiments,the two-stage bit weight distribution matching-based PS-64QAM OFDM signals with a rate of 28.13 Gb/s transmission over 4 m wireless+45-km standard single-mode fiber transmission can be *** system performance is investigated under one LDPC code rate(3/4)and two PS parameter values(k=3 and 9).The experimental results show that the receiver power sensitivity and the system fiber nonlinear effect tolerance can be significantly improved compared with uniformly distributed OFDM signals.

关键词： probabilistic shaping two-stage bit weight distribution matching orthogonal frequency division multiplexing W-band radio-over-fiber system

Mechanochemical route to fabricate an efficient nitrate reduction electrocatalyst

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Nano Research 2024年第6期17卷 4889-4897页

作者： Yunliang Liu Zhiyu Zheng Sobia Jabeen Naiyun Liu Yixian Liu Yuanyuan Cheng Yaxi Li Jingwen Yu Xin Wu Nina Yan Lei xu haitao Li Institute for Energy Research School of Energy and Power EngineeringJiangsu UniversityZhenjiang 212013China Jiangsu Engineering Technology Research Center of Biomass Composites and Addictive Manufacturing Institute of Agricultural Facilities and EquipmentJiangsu Academy of Agricultural SciencesNanjing 210014China Key Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River Ministry of Agriculture and Rural AffairsNanjing 210014China

The electrochemical nitrate reduction reaction(NO_(3)RR)to ammonia under ambient conditions is a promising approach for addressing elevated nitrate levels in water bodies,but the progress of this reaction is impeded by the complex series of chemical reactions involving electron and proton transfer and competing hydrogen evolution ***,it becomes imperative to develop an electro-catalyst that exhibits exceptional efficiency and remarkable selectivity for ammonia synthesis while maintaining long-term *** the magnetic biochar(Fe-C)has been synthesized by a two-step mechanochemical route after a pyrolysis treatment(450,700,and 1000℃),which not only significantly decreases the particle size,but also exposes more oxygen-rich functional groups on the surface,promoting the adsorption of nitrate and water and accelerating electron transfer to convert it into *** showed that the catalyst(Fe-C-700)has an impressive NH_(3)production rate of 3.5 mol·h^(−1)·gcat^(−1),high Faradaic efficiency of 88%,and current density of 0.37 A·cm^(−2)at 0.8 V *** hydrogen electrode(RHE).In-situ Fourier transform infrared spectroscopy(FTIR)is used to investigate the reaction intermediate and to monitor the *** oxygen functionalities on the catalyst surface activate nitrate ions to form various intermediates(NO_(2),NO,NH_(2)OH,and NH_(2))and reduce the rate determining step energy barrier(*NO_(3)→*NO_(2)).This study presents a novel approach for the use of magnetic biochar as an electro-catalyst in NO_(3)RR and opens the road for solving environmental and energy challenges.

关键词： mechanochemical route magnetic biochar electron transfer nitrate ammonia

Design of Hybrid Simulated Annealing Algorithm for UAV Scheduling Based on Coordinated Task Scheduling

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Design of Hybrid Simulated Annealing Algorithm for UAV Sched...

基于PVC基体的铵离子敏感膜制备及性能表征

第40届中国控制会议

作者： Lijie Wu Qi Sun haitao xu Xiaochen Song Yang Zhang College of Civil Aviation Shenyang Aerospace University Antai College of Economics & Management Shanghai Jiao Tong University Department of Electrical Engineering and Computer Science Cleveland State University

Aiming at the issue of UAV coordinated scheduling,this paper attempts to construct a UAV scheduling model based on an online coordination platform from the perspective of task requesters’ satisfaction and task assigners’ interests so as to increase the efficiency of UAV group network transportation and improve the service satisfaction of task *** order to solve the multi-objective mixed integer programming model,a hybrid simulated annealing algorithm,which satisfies mission mileage,waiting time and coordinated UAV scheduling time,is designed to obtain a scheduling scheme simulation that reduces UAV coordination costs and saves UAV resources,taking into account the interests of both task requesters and the task ***,the effectiveness of the model is verified by a calculation example,of which the results indicate that this method helps to effectively allocate the needs of task requesters,save the flight mileage and reduce the unloaded flight rate.

关键词： coordinated scheduling UAV Simulated annealing Hybrid optimization

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电力科技与环保 2024年第4期40卷 416-426页

作者：雒建中柏源韦飞周香刘田田梅蓉金奇杰徐海涛闫新龙林正根国家能源投资集团有限责任公司北京100011 国电环境保护研究院有限公司江苏南京210031 国家能源集团科学技术研究院有限公司江苏南京210023 南京工业大学环境科学与工程学院江苏南京211816 中国矿业大学化工学院江苏徐州221116

铵离子选择电极是电厂脱硫废水氨氮检测传感器的核心部件,而铵离子敏感膜是影响传感器电极性能的关键因素。为获得性能较好的铵离子敏感膜,本文以PVC为敏感膜基体,针对增塑剂、离子添加剂和离子载体的这3种添加剂的组合变化筛选最佳配... 详细信息

铵离子选择电极是电厂脱硫废水氨氮检测传感器的核心部件,而铵离子敏感膜是影响传感器电极性能的关键因素。为获得性能较好的铵离子敏感膜,本文以PVC为敏感膜基体,针对增塑剂、离子添加剂和离子载体的这3种添加剂的组合变化筛选最佳配方组合,并表征和分析其对电极响应性能的影响,以及敏感膜性能参数的变化规律,同时考察了Li^(+)、Na^(+)等9类干扰离子对电极选择性及抗干扰能力的影响。结果表明:敏感膜的最佳配方为50%邻苯二甲酸二丁酯+0.75%四(4-氯苯基)硼酸钾+1.20%无活菌素,基底PVC与邻苯二甲酸二丁酯的质量比为1:1,与溶剂四氢呋喃的质量比为1:20。该配方下敏感膜的探测下限为1.26×10^(-5)mol/L;当氯化铵溶液浓度大于0.001 mol/L时,响应时间为0.5~2.0s;浓度小于0.001 mol/L时,响应时间则延长至约5 s;重现性测试显示,相对标准偏差均小于2%;电极寿命超过90 d,性能良好。多种表征结果显示膜具有无定形的微观结构,各组分良好的相容性有利于强化NH+4的响应稳定性。加入增塑剂和离子添加剂后,离子载体的主要结构未发生明显改变,膜的完整性能够保持;9类离子选择性系数均小于0,干扰性均较小。其中K^(+)干扰最大,可以通过K+浓度修正方程解决,从而提高氨氮检测的准确性。

关键词：脱硫废水铵离子选择电极敏感膜增塑剂电极性能

Fontan循环的新时代——远期淋巴系统并发症研究进展

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心血管病学进展 2024年第4期45卷 299-302页

作者：杜楚豪董捷董硕刘顺徐海涛孙阳雪李守军杨克明闫军中国医学科学院北京协和医学院国家心血管病中心阜外医院小儿外科中心北京100037

全腔静脉-肺动脉连接术(Fontan姑息手术)挽救了大量单心室结构患儿的生命。然而,术后远期淋巴系统并发症严重影响着患者的预后。现回顾既往相关文献,总结Fontan术后患者淋巴系统并发症的自然病程、病理生理、临床表现、诊断和治疗管理。

关键词： Fontan循环淋巴系统并发症塑型性支气管炎蛋白丢失性肠病淋巴管介入治疗