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High-rate lithium-ion battery performance of a ternary sea urchin-shaped CoNiO_(2)@NiP_(6)Mo_(18)/CNTs composites

Journal of Energy Chemistry 2024年第9期96卷 516-525页

作者： li-ping cui Shuang Sun Kai Yu Shu Zhang Mei-lin Wang Jia-jia Chen Bai-bin Zhou Key Laboratory for Photonic1nd Electronic Bandgap Materials Ministry of EducationSchool of Chemistry1nd Chemical EngineeringHarbin Normal UniversityHarbin 150025HeilongjiangChina State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry1nd Chemical EngineeringCollaborative Innovation Centre of Chemistry for Energy MaterialsXiamen UniversityXiamen 361005FujianChina

Bimetallic oxides are attractive anode materials for lithium-ion batteries(liBs)due to their large theoretical ***,the low conductivity,short cycle life,and poor rate capability are the bottlenecks for their further *** overcome above issues,the basket-like polymolybdate(NiP_(6)Mo_(18))and carbon nanotubes(CNTs)were uniformly embedded on the urchin-shaped CoNiO_(2)nanospheres to yield a ternary composites CoNiO_(2)@NiP_(6)Mo_(18)/CNTs via electrostatic *** multi-level morphology of urchin spinules accelerates the diffusion rate of li^(+);CNT improves the conductivity and enhances cycle stability of the material;and heteropoly acid contributes more redox activity ***,CoNiO_(2)@NiP_(6)Mo_(18)/CNTs as an anode of liBs exhibits a high initial capacity(1396.7 mA h g^(−1)at 0.1 A g^(−1)),long-term cycling stability(750.2 mA h g^(−1)after 300 cycles),and rate performance(450.3 mA h g^(−1)at 2 A g^(−1)),which are superior to reported metallic oxides anode of *** density functional theory(DFT)and kinetic mechanism suggest that CoNiO_(2)@NiP_(6)Mo_(18)/CNTs delivers an outstanding pseudocapacitance and rapid li^(+)diffusion behaviors,which is due to the rich surface area of the urchin-like CoNiO_(2)with the uniform embeddedness of NiP_(6)Mo_(18)and *** study provides a new idea for optimizing the performance of bimetallic oxides and developing high-rate lithium-ion battery composites.

关键词： Bi-metal oxides Transition metal oxides Polyoxometalates Nanocomposite liBs

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一类具有Allee效应的两种群竞争模型

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数学的实践与认识 2024年第3期54卷 99-111页

作者：张彦麒李翠萍北京航空航天大学数学科学学院信息与行为教育部重点实验室北京100083

Allee效应是一种生物种群密度依赖的现象,在种群密度较低的情况下,种群的增长率与种群密度呈正相关关系.考虑一种具有Allee效应的Lotka-Volterra两种群竞争模型,给出了其平衡点的存在和稳定性条件,并且讨论了解的有界性以及周期解的不... 详细信息

Allee效应是一种生物种群密度依赖的现象,在种群密度较低的情况下,种群的增长率与种群密度呈正相关关系.考虑一种具有Allee效应的Lotka-Volterra两种群竞争模型,给出了其平衡点的存在和稳定性条件,并且讨论了解的有界性以及周期解的不存在性,最后通过数值模拟展示所得结果.

关键词：竞争模型 Allee效应平衡点稳定性周期解

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基于熵权法的美丽福建综合评价体系构建和应用研究

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环境生态学 2024年第8期6卷 138-143,150页

作者：李翠萍福建省环境监测中心站福建福州350003

本研究以习近平生态文明思想为指导思想,以建立人与自然和谐共生的现代化为目标,构建由5个维度40个单项指标构成的美丽福建综合评价指标体系,运用熵权法客观赋值权重,权重从大到小依次为生态优良>城乡宜居>社会文明>绿色发展>人文和谐,... 详细信息

本研究以习近平生态文明思想为指导思想,以建立人与自然和谐共生的现代化为目标,构建由5个维度40个单项指标构成的美丽福建综合评价指标体系,运用熵权法客观赋值权重,权重从大到小依次为生态优良>城乡宜居>社会文明>绿色发展>人文和谐,表明生态优良是建设美丽福建的基石,必须保持加强生态文明建设的战略定力。同时选取福建第六批生态示范县市中厦门和南平作为研究区域,对厦门和南平2019—2021年美丽福建综合发展水平进行评价,结果显示:一是内陆山区城市和沿海平原城市之间存在较大的空间差异性,南平生态优良维度优势显著,厦门除生态优良维度外,其他维度综合评价结果均高于南平;二是同年份综合评价结果表明厦门美丽福建水平均高于南平;三是从3年评价结果分析,厦门和南平的美丽福建建设水平均在逐年上升,美丽福建建设方面成绩显著。

关键词：美丽福建美丽中国综合评价体系熵权法

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数据库参数配置智能调优研究综述

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计算机学报 2024年第8期47卷 1901-1921页

作者：李奕言田季坤蒲照李翠平陈红中国人民大学信息学院北京100872 数据库与商务智能教育部工程研究中心北京100872 数据工程与知识工程教育部重点实验室北京100872

数据库系统具有大量的参数,这些参数控制了系统的内存分配、I/O优化、备份与恢复等诸多方面,极大地影响着数据库的性能.随着数据库和应用程序的规模和复杂性的增长,传统依靠数据库管理员手动配置参数的方式已经越来越难以满足用户需求.... 详细信息

数据库系统具有大量的参数,这些参数控制了系统的内存分配、I/O优化、备份与恢复等诸多方面,极大地影响着数据库的性能.随着数据库和应用程序的规模和复杂性的增长,传统依靠数据库管理员手动配置参数的方式已经越来越难以满足用户需求.数据库参数配置智能调优将机器学习技术应用到参数调优领域,依据负载信息、数据库参数和性能,借助机器学习算法推荐一组最优的参数.本文针对现有参数配置智能调优技术,从调优方法、应用情况和未来挑战三个方面依次进行梳理和总结.首先将现有参数调优方法依据所用算法不同分为五类,从原理、技术、优缺点等方面对各类方法进行详细介绍和总结.之后介绍当前工业界主流的参数调优工具,分析参数配置智能调优在实际应用过程中遇到的问题及原因.最后,本文对数据库参数配置智能调优的未来研究方向进行了展望.本文旨在帮助研究者掌握当前数据库参数配置智能调优领域主流方法及面临的问题,以推动后续研究工作的开展.

关键词：机器学习参数调优贝叶斯优化强化学习智能数据库

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催眠训练对冻融胚胎移植患者身心状态的影响研究

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中国实用医药 2024年第8期19卷 33-37页

作者：马为梅李莉李翠萍邵衬衬吕小红孔俏俏续锦泰安市中心医院 271000 泰山职业护理学院 271000

目的研究催眠训练对冻融胚胎移植(FET)患者焦虑、抑郁等身心状态的影响,探索心理干预在辅助生殖领域应用的可行性。方法195例FET患者,在周期治疗中各环节点均常规给予健康宣教和心理护理。入组患者移植日术前增加一堂约20 min的催眠训... 详细信息

目的研究催眠训练对冻融胚胎移植(FET)患者焦虑、抑郁等身心状态的影响,探索心理干预在辅助生殖领域应用的可行性。方法195例FET患者,在周期治疗中各环节点均常规给予健康宣教和心理护理。入组患者移植日术前增加一堂约20 min的催眠训练课。比较所有FET患者催眠训练前后贝克抑郁量表(BDI)、贝克焦虑量表(BAI)评分,BDI分度,BAI分度,脉率,选择负性情绪词汇情况,选择正性情绪词汇情况。结果FET患者BDI评分由催眠训练前的(3.58±4.87)分下降至催眠训练后的(1.03±2.43)分,BAI评分由催眠训练前的(8.02±8.04)分下降至催眠训练后的(2.59±4.41)分(P0.05)。FET患者催眠训练后的脉率为(75.5±7.8)次/min较催眠训练前的(79.7±8.1)次/min显著下降,有明显差异(P0.05)。所列10个正性词汇中,催眠训练后有放松、平静、舒适、踏实、信心、温暖、安全、愉快选择率80.51%、78.97%、40.51%、36.41%、32.31%、22.05%、12.82%、21.03%,与催眠训练前的13.33%、26.15%、7.69%、6.67%、19.49%、6.67%、5.13%、12.82%比较,有明显差异(P0.05)。结论催眠训练能显著降低FET患者的焦虑抑郁水平,减少患者负性情绪,增加正性情绪,提升患者的身体、心理舒适度和就医感受,具有良好的应用推广价值。

关键词：冻融胚胎移植催眠焦虑抑郁

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Combination therapy of hydrogel and stem cells for diabetic wound healing

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World Journal of Diabetes 2022年第11期13卷 949-961页

作者： Jia-Na Huang Hao Cao Kai-Ying liang li-ping cui Yan li School of Biomedical Engineering Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107Guangdong ProvinceChina Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument Sun Yat-sen UniversityGuangzhou 510006Guangdong ProvinceChina Endocrinology Department Panyu Central HospitalGuangzhou 511400Guangdong ProvinceChina

Diabetic wounds(DWs)are a common complication of diabetes mellitus;DWs have a low cure rate and likely recurrence,thus affecting the quality of patients’*** traditional therapy cannot effectively improve DW closure,DW has become a severe clinical medical problem *** routine wound healing,DW is difficult to heal because of its chronically arrested inflammatory *** mesenchymal stem cells and their secreted cytokines can alleviate oxidative stress and stimulate angiogenesis in wounds,thereby promoting wound healing,the biological activity of mesenchymal stem cells is compromised by direct injection,which hinders their therapeutic *** form a three-dimensional network that mimics the extracellular matrix,which can provide shelter for stem cells in the inflammatory microenvironment with reactive oxygen species in DW,and maintains the survival and viability of stem *** review summarizes the mechanisms and applications of stem cells and hydrogels in treating DW;additionally,it focuses on the different applications of therapy combining hydrogel and stem cells for DW treatment.

关键词： Combination therapy Mesenchymal stem cells Hydrogel Diabetic wound Cells delivery Wound healing

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Effects of inorganic nutrients and environmental factors on the removal of n-propylbenzene and isopropylbenzene in seawater by cryptophytes Rhinomonas reticulata S6A

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Journal of Oceanology and limnology 2024年第4期42卷 1200-1215页

作者： Jiali cui Shuhao DU Yumei li Haiping li ping ZHANG Fanping MENG Key Laboratory of Marine Environment and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China

To effectively remove n-propylbenzene(n-PBZ)and isopropylbenzene(i-PBZ)leaked into seawater using Rhinomonas reticulata S 6 A(a newly isolated marine microalga),the effects of three inorganic nutrients and four environmental factors on their degradation were determined after 7 d of *** show that NaNO_(3) at 300 mg/L caused a higher removal efficiency of both n-PBZ and i-PBZ(44.79%and 39.26%),while for NaH_(2) PO_(4)·H_(2) O,greater removal rates of two PBZs(47.30%and 42.23%)were achieved at 30 and 20 mg/L,***_(3) supplementation(500-750 mg/L)resulted in a large reduction(43.67%-45.04%)in i-PBZ *** change in seawater pH(from 6 to 9)did not affect the elimination of n-PBZ and *** most suitable salinity and temperature were 30 and 25-30℃,respectively,leading to the PBZs removal of~40%.light intensity exhibited significant influence on elimination of PBZs,and the maximum removal efficiencies of 56.07%(n-PBZ)and 55.00%(i-PBZ)were recorded under 200 and 600μmol/(m^(2)·s),*** addition,the microalga could still remove PBZs when it failed to grow well due to darkness,strong light,low temperature,or low salinity,which might mean that good growth of alga is not always a necessary condition for PBZs ***,attention should be paid to the suitability of nutrient levels and environmental conditions(excluding pH)in seawater when using microalgae for bioremediating PBZs-contaminated seawater.

关键词： propylbenzene(PBZ) Rhinomonas reticulata seawater inorganic nutrient environmental factor

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Investigating effect of coke porosity on blast furnace performance based on multi-physical fields

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Journal of Iron and Steel Research(International) 2024年第2期31卷 357-367页

作者： Ji Chen Zhao Lei Zhe Yao li Wang Qiang ling ping cui Anhui Province Key Laboratory of Coal Clean Conversion and High Valued Utilization School of Chemistry and Chemical EngineeringAnhui University of TechnologyMa’anshan243002AnhuiChina Shanxi Academy of Printing Technology Research Institute Co. Ltd.Xi’an710077ShaanxiChina

Reducing coke use is an effective measure to reduce carbon emission and energy consumption in the blast furnace(BF)***,BF is a high-temperature moving bed reactor,where complex physical transformations coupled with complicated reactions *** makes it challenging to investigate the factors determining BF performance with the conventional method.A multi-physical field coupling mathematical model of BF was thus developed to describe its mass and heat transfer as well as its intrinsic ***,the proposed model was validated with the production *** coupling conditions,influences of dominating reactions on BF performance(temperature distribution,gas distribution,iron formation reaction,and direct reduction degree)were *** results indicated that coke combustion,indirect reduction,and direct reduction of iron ore mainly took place nearby the shaft tuyere,cohesive zone,and dripping zone,***,the rate of coke solution loss reaction was increased with the rising coke porosity in the cohesive *** the effect of coke porosity on the efficiency and stability of BF,the coke porosity of 0.42 was regarded as a reasonable value.

关键词： Blast furnace Mathematical model Multi-physical field Simulation Coke porosity

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Topological and superconducting properties of monolayered CoN and CoP:A first-principles comparative study

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 98-108页

作者： Jiaqing Gao Zhenyu Zhang ping cui International Center for Quantum Design of Functional Materials(ICQD) Hefei National Research Center for Physical Sciences at Microscale(HFNL)University of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China

Two-dimensional systems that simultaneously harbor superconductivity and nontrivial band topology may serve as appealing platforms for realizing topological superconductivity with promising applications in fault-tolerant quantum ***,based on first-principles calculations,we show that monolayered Co N and Co P with the isovalent Fe Se-like structure are stable in freestanding form,even though their known bulk phases have no resemblance to *** two systems are further revealed to display intrinsic band inversions due to crystal field splitting,and such orderings are preserved with the inclusion of spin-orbit coupling(SOC),which otherwise is able to open a curved band gap,yielding a non-zero Z2 topological invariant in each *** a mechanism of topologicalization is distinctly contrasted with that identified recently for the closely related monolayers of CoX(X=As,Sb,Bi),where the SOC plays an indispensable role in causing a nontrivial band ***,we demonstrate that,by applying equi-biaxial tensile strain,the electron-phonon coupling strength in monolayered CoN can be significantly enhanced,yielding a superconducting transition temperature(Tc)up to 7-12 K for the Coulomb pseudopotential ofμ*=0.2-0.1,while the CoP monolayer shows very low Tc even under pronounced *** different superconducting behaviors can be attributed to different variations in lattice softening and electronic density of states around the Fermi level upon *** central findings enrich the understanding of different mechanisms of band inversions and topologicalization and offer platforms for achieving the coexistence of superconductivity and nontrivial band topology based on two-dimensional systems.

关键词： topological yielding otherwise

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A bi-As-capped and tetra-V-substituted arsenomolybdate:synthesis,structure,capacitive and electrocatalytic properties

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钨科技(英文) 2023年第2期5卷 270-276页

作者： Shuang-Hong Ge li-ping cui Kai Yu Mei-lin Wang Chun-Mei Wang lian-Xin Guo Bai-Bin Zhou Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbin 150025China Key Laboratory of Molecular Cytogenetics and Genetic Breeding of Heilongjiang Province College of Life Science and TechnologyHarbin Normal UniversityHarbin 150025China

A bi-As-capped and tetra-V-substituted arsenomolybdate(Hbib)_(2)(biyb)_(3)[As^(Ⅲ)_(2)As^(Ⅴ)Mo^(Ⅵ)8V^(Ⅴ)_(4)O_(40)]_(2)·H_(2)O(1)(bib=1.4-Bis(imidazoly)butane;biyb=1,4-bis(imidazol-1-ylmethyl)benzene)has been constructed through hydrothermal methods and characterized by conventional *** 1 is a tetra-V substituted{AsMo^(Ⅵ)_(8)V^(Ⅴ)_(4)O_(4)}polyanions capped by two AsⅢcations at two symmetrical ditch in{AsO_(4)}rectangular pyramid *** exhibits higher specific capacitance,capacitance retention,and electrocatalytic activities for oxidizing ascorbic acid and reducing peroxide hydrogen.

关键词： Arsenomolybdate Crystal structure Hydrothermal synthesis Capacitive performence Electrocatalytic nronerty

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