检索结果-南通市图书馆

Outstanding Lithium Storage Performance of a Copper-Coordinated Metal-Covalent Organic Framework as Anode Material for Lithium-Ion Batteries

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第05期 33-40页

作者： Derong Luo Huizi Zhao feng Liu hai Xu Xiaoyu Dong Bing Ding Hui Dou Xiaogang Zhang Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics

Metal-covalent organic frameworks （MCOF） as a bridge between covalent organic framework （COF） and metal organic framework （MOF） possess the characteristics of open metal sites, structure stability, crystallinity, tunability as well as porosity, but still in its infancy. In this work, a covalent organic framework DT-COF with a keto-enamine structure synthesized from the condensation of 3,3'-dihydroxybiphenyl diamine （DHBD） and triformylphloroglucinol （TFP） was coordinated with Cu2+by a simple postmodification method to a obtain a copper-coordinated metal-covalent organic framework of Cu-DT COF. The isomerization from a keto-enamine structure of DT-COF to a enol-imine structure of Cu-DT COF is induced due to the coordination interaction of Cu2+. The structure change of Cu-DT COF induces the change of the electron distribution in the Cu-DT COF, which greatly promotes the activation and deep Li-storage behavior of the COF skeleton. As anode material for lithium-ion batteries （LIBs）, Cu-DT COF exhibits greatly improved electrochemical performance, retaining the specific capacities of 760 mAh g-1after 200 cycles and 505 mAh g-1after 500 cycles at a current density of 0.5 A g-1. The preliminary lithium storage mechanism studies indicate that Cu2+is also involved in the lithium storage process. A possible mechanism for Cu-DT COF was proposed on the basis of FT-IR, XPS,EPR characterization and electrochemical *** work enlightens a novel strategy to improve the energy storage performance of COF and promotes the application of COF and MCOF in LIBs.

关键词：

The Evolution of Photospheric Current Density During an X9.3-Class Solar Flare

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第10期24卷 189-200页

作者： hai-Li Li Hong-Fei Liang Xin-Ping Zhou Yu Liu Ni Meng Yu-Long feng Department of Physics Yunnan Normal UniversityKunming 650500China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100190China College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610068China School of Physical Science and Technology Southwest Jiaotong UniversityChengdu 610068China

This paper deduced the temporal evolution of the magnetic field through a series of high-resolution vector magnetograms and calculated the fine distribution map of current density during an X9.3-class flare eruptions using Ampère's *** results show that a pair of conjugate current ribbons exist on both sides of the magnetic neutral line in this active region,and these conjugate current ribbons persist before,during,and after the *** was observed that the X9.3-class flare brightened in the form of a bright core and evolved into a double-ribbon flare over ***,the position of the double-ribbon flare matches the position of the current ribbons with high accuracy,and their morphologies are very *** investigating the complexity of current density and flare morphology,we discovered a potential connection between the eruption of major flares and the characteristics of current density.

关键词： Sun:activity Sun:magnetic fields Sun:flares methods:data analysis

浅析如何在就业中完成一场高质量远程在线面试

在线全文

学校读者我要写书评

暂无评论

科技创新与生产力 2021年第6期 118-120页

作者：景毅靳海峰西南科技大学四川绵阳621010 新疆职业大学新疆乌鲁木齐830013

本文分析了在线面试的优势,提出应聘者应了解在线面试优势背后的本质;懂得怎样将其优势与自身能力完美结合;如何在面试前做准备、在面试时呈现最佳状态、在面试后进行复盘,为引导学生完成一场高质量的远程在线面试并获取心仪岗位的录用... 详细信息

本文分析了在线面试的优势,提出应聘者应了解在线面试优势背后的本质;懂得怎样将其优势与自身能力完美结合;如何在面试前做准备、在面试时呈现最佳状态、在面试后进行复盘,为引导学生完成一场高质量的远程在线面试并获取心仪岗位的录用提出意见与建议。

关键词：就业在线面试互联网

In-situ physical/chemical cross-linked hydrogel electrolyte achieving ultra-stable zinc anode-electrolyte interface towards dendrite-free zinc ion battery

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第10期97卷 342-351,I0007页

作者： Chen-Yang Li Jiang-Lin Wang Dong-Ting Zhang Min-Peng Li Hao Chen Wei-hai Yi Xin-Ying Ren Bao Liu Xue-feng Lu Mao-Cheng Liu State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050GansuChina School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050GansuChina Chaowei Power Group Co. LTDChangxing 313100ZhejiangChina School of Vehicle Engineering Jiangsu UniversityNanjing 210031jiangsuChina

Hydrogen evolution reaction(HER),zinc corrosion,and dendrites growth on zinc metal anode are the major issues limiting the practical applications of zinc-ion ***,an in-situ physical/chemical cross-linked hydrogel electrolyte(carrageenan/polyacrylamide/ZnSO_(4),denoted as CPZ)has been developed to stabilize the zinc anode-electrolyte interface,which can eliminate side reactions and prevent dendrites *** in-situ CPZ hydrogel electrolyte improves the reversibility of zinc anode due to eliminating side reactions caused by active water ***,the electrostatic interaction between the SO_(4)^(-)groups in CPZ and Zn^(2+)can encourage the preferential deposition of zinc atoms on(002)crystal plane,which achieve dendrite-free and homogeneous zinc *** in-situ hydrogel electrolyte offers a streamlined approach to battery manufacturing by allowing for direct integration into the ***,the Zn//Zn half battery with CPZ hydrogel electrolyte can enable an ultra-long cycle over 5500 h at a current density of 0.5 mA cm^(-2),and the Zn//Cu half battery reach an average coulombic efficiency of 99.37%.The Zn//V_(2)O_5-GO full battery with CPZ hydrogel electrolyte demonstrates94.5%of capacity retention after 2100 *** study is expected to open new thought for the development of commercial hydrogel electrolytes for low-cost and long-life zinc-ion batteries.

关键词： In-suit CPZ hydrogel electrolyte Hydrogen evolution reaction and zinc corrosion Dendrites growth Zinc anode-electrolyte interface Zn ion batteries

Multi-surrogate framework with an adaptive selection mechanism for production optimization

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第1期21卷 366-383页

作者： Jia-Lin Wang Li-Ming Zhang Kai Zhang Jian Wang Jian-Ping Zhou Wen-feng Peng Fa-Liang Yin Chao Zhong Xia Yan Pi-Yang Liu Hua-Qing Zhang Yong-Fei Yang hai Sun School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Qingdao University of Technology Qingdao266580ShandongChina College of Science China University of PetroleumQingdao266580ShandongChina Zepu Oil and Gas Development Department PetroChina Tarim Oilfield CompanyKorla841000XinjiangChina hainan Branch of CNOOC Ltd Haikou70311HainanChina

Data-driven surrogate models that assist with efficient evolutionary algorithms to find the optimal development scheme have been widely used to solve reservoir production optimization ***,existing research suggests that the effectiveness of a surrogate model can vary depending on the complexity of the design problem.A surrogate model that has demonstrated success in one scenario may not perform as well in *** the absence of prior knowledge,finding a promising surrogate model that performs well for an unknown reservoir is ***,the optimization process often relies on a single evolutionary algorithm,which can yield varying results across different *** address these limitations,this paper introduces a novel approach called the multi-surrogate framework with an adaptive selection mechanism(MSFASM)to tackle production optimization *** consists of two *** the first stage,a reduced-dimensional broad learning system(BLS)is used to adaptively select the evolutionary algorithm with the best performance during the current optimization *** the second stage,the multi-objective algorithm,non-dominated sorting genetic algorithm II(NSGA-II),is used as an optimizer to find a set of Pareto solutions with good performance on multiple surrogate models.A novel optimal point criterion is utilized in this stage to select the Pareto solutions,thereby obtaining the desired development schemes without increasing the computational load of the numerical *** two stages are combined using sequential transfer *** the two most important perspectives of an evolutionary algorithm and a surrogate model,the proposed method improves adaptability to optimization problems of various reservoir *** verify the effectiveness of the proposed method,four 100-dimensional benchmark functions and two reservoir models are tested,and the results are compared with those obtained by six other surrogate-model-based *** res

关键词： Production optimization Multi-surrogate models Multi-evolutionary algorithms Dimension reduction Broad learning system

Construction of wavelength-tunable DSE quinoline salt derivatives by regulating the hybridization form of the nitrogen atom and intramolecular torsion angle

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第10期35卷 315-320页

作者： Kuan Deng Fei Yang Zhi-Qi Cheng Bi-Wen Ren Hua Liu Jiao Chen Meng-Yao She Le Yu Xiao-Gang Liu hai-Tao feng Jian-Li Li Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education Shaanxi Key Laboratory for Carbon Neutral TechnologyCollege of Chemistry&Materials ScienceNorthwest UniversityXi'an710127China Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationBiomedicine Key Laboratory of Shaanxi ProvinceLab of Tissue Engineeringthe College of Life SciencesFaculty of Life Science&MedicineNorthwest UniversityXi'an 710069China Fluorescence Research Group Singapore University of Technology and DesignSingapore 487372Singapore Baoji AIE Research Center Shaanxi Key Laboratory of PhytochemistryCollege of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji721013China

Dual-state emission(DSE)molecules displayed conspicuous fluorescent performance both in solid and solution ***,the construction of DSE molecules and the regulation of their emission wavelengths remains a great *** on the structure-function relationship of quinolinonitrile-type fluorophores,this work proposed a feasible strategy for modulating their fluorescent properties into DSE via limiting the torsion angle between the quinoline ring and C=C bond in the range of 4.7°to 30°.Based on this strategy,53 compounds were obtained which displayed tunable emission wavelengths from^(3)97 nm to 740 nm in solid-state and from 360 nm to 672 nm in *** feasibility of the strategy was supported by a series of theoretical calculations,optical characterizations,and crystal analysis,suggesting the compounds have great potential in imaging living cells and tissues with desired wavelengths.

关键词： Fluorescence Dual-state emission Structure-function relationship Wavelength regulation Fluorescent imaging

在线全文

学校读者我要写书评

暂无评论

尼古丁加重慢性他克莫司肾毒性的机制

中国老年学杂志 2021年第10期41卷 2121-2126页

作者：张竞月金海峰李灿金华延边大学附属医院肾病科吉林延吉133000

目的探讨烟草中主要毒性成分尼古丁(NIC)是否加重他克莫司(TAC)诱导的肾脏损伤。方法将32只雄性SD大鼠分为正常对照组(VH)组、TAC组、NIC组、NIC+TAC组,每组8只。各组分别给予橄榄油、TAC、NIC、NIC+TAC干预4 w。检测各组生化、肾功能... 详细信息

目的探讨烟草中主要毒性成分尼古丁(NIC)是否加重他克莫司(TAC)诱导的肾脏损伤。方法将32只雄性SD大鼠分为正常对照组(VH)组、TAC组、NIC组、NIC+TAC组,每组8只。各组分别给予橄榄油、TAC、NIC、NIC+TAC干预4 w。检测各组生化、肾功能、尿蛋白排泄量、肾小管间质纤维化(TIF)程度,免疫组化和Western印迹法分别检测致纤因子、细胞凋亡相关基因的表达。结果与TAC组比较,NIC+TAC组血肌酐(Scr)、血尿素氮(BUN)、尿蛋白排泄量显著升高,肾小管间质纤维化(TIF)程度、肾小球系膜区面积显著扩大,转化生长因子(TGF)-β1表达显著增加;血清及尿排泄8-羟脱氧鸟苷(8-OHdG)显著增加,超氧化物歧化酶(SOD)1、SOD2表达显著降低,NADPH氧化酶(NOX)-2、NOX-4表达显著增加;B淋巴细胞瘤(Bcl)-2/Bcl-2相关X蛋白(Bax)比值显著降低,活化的天冬氨酸特异性半胱氨酸蛋白酶(Cleaved caspase)-3显著增加,原位缺口末端标记(TUNEL)法显示TUNEL阳性细胞数显著增加(均P<0.05)。结论NIC加重了TAC诱导的肾损伤,其机制可能与NIC加重氧化应激和细胞凋亡有关,暗示戒烟可能对服用TAC的移植吸烟者有益。

关键词：尼古丁他克莫司氧化应激细胞凋亡

Finite-temperature ductility-brittleness and electronic structures of Al_(n)Sc(n=1,2 and 3)

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第8期43卷 3974-3989页

作者： Xue-Qian Wang Ying Zhao Hao-Xuan Liu Shu-Chen Sun Hong-Bo Yang Jia-Min Zhong Gan-feng Tu Song Li Yu-Dong Zhang Claude Esling hai-Le Yan Liang Zuo Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China Rare Earth Functional Materials(Xiong'an)Innovation Center Co. Ltd.Xiong'an 071700China Laboratoire d'étude des Microstructures et de Mécanique des Matériaux(LEM3) Unikersitéde Lorraine57045MetzFrance

Finite-temperature ductility-brittleness and electronic structures of Al_(3)Sc,Al_(2)Sc and AlSc are studied comparatively by first-principles calculations and ab initio molecular *** show that Al_(3)Sc and Al_(2)Sc are brittle at both ground state and finite temperatures,while AlSc possesses a significantly superior *** ground state,AlSc is ductile from Pugh's and Poisson's criteria,while it is brittle in Pettifor's *** ductility of all Al_(3)Sc,Al_(2)Sc and AISc improves greatly with the elevated ***,the Cauchy pressure of AlSc undergoes a transition from negative to *** T>600 K,AlSc is unequivocally classified as ductile from all criteria *** all compounds,the Al-Al bond originated from s-p and p-p orbital hybridizations,and the Al-Sc bond dominated by p-d covalent hybridization,are the first and second strongest chemical bonds,*** explain the difference in mechanical properties,the mean bond strength(MBS)is introduced in this *** weaker Al-Al bond in AlSc,leading to a smaller MBS,could be the origin of the softer elastic stiffness and superior intrinsic *** longer length of the Al-Al bond in AlSc is responsible for its weaker bond ***,the enhanced metallicity of the Al-Al bond in AlSc would also contribute to its exceptional *** longer length of the Al-Al bond in AISc is responsible for its weaker bond ***,the enhanced metallicity of the Al-Al bond in AlSc would also contribute to its exceptional ductility.

关键词： Al-Sc Target materials Intrinsic ductility Finite-temperature elastic constant First-principles calculation

Coulomb-assisted nonlocal electron transport between two pairs of Majorana bound states in a superconducting island

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第5期33卷 275-279页

作者：王浩迪任俊潼吕海峰柯莎莎 School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

We investigate the nonlocal transport modulated by Coulomb interactions in devices comprising two interacting Majorana wires,where both nanowires are in proximity to a mesoscopic superconducting(SC)*** Majorana bound state(MBS)is coupled to one lead via a quantum dot with resonant *** this device,the nonlocal correlations can be induced in the absence of Majorana energy *** find that the negative differential conductance and giant current noise cross correlation could be induced,due to the interplay between nonlocality of MBSs and dynamical Coulomb blockade *** feature may provide a signature for the existence of the MBSs.

关键词： Majorana bound states superconducting island current cross correlation