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Nano-Micro Letters 2021年第3期13卷 155-167页

作者： Wenyan du Kangqi Shen Yuruo Qi Wei Gao Mengli Tao guangyuan du Shu‑juan Bao Mingyang Chen Yuming Chen Maowen Xu Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationSchool of Materials and EnergySouthwest UniversityChongqing 400715People’s Republic of China Beijing Computational Science Research Center Beijing 100193People’s Republic of China Center for Green Innovation School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China College of Environmental Science and Engineering Fujian Normal UniversityFuzhou 350007People’s Republic of China

Rechargeable room temperature sodium–sulfur(RT Na–S)batteries are seriously limited by low sulfur utilization and sluggish electrochemical reaction activity of polysulfide ***,a 3D“branch-leaf”biomimetic design proposed for high performance Na–S batteries,where the leaves constructed from Co nanoparticles on carbon nanofibers(CNF)are fully to expose the active sites of *** CNF network acts as conductive“branches”to ensure adequate electron and electrolyte supply for the Co *** an effective electrocatalytic battery system,the 3D“branch-leaf”conductive network with abundant active sites and voids can effectively trap polysulfides and provide plentiful electron/ions pathways for electrochemical *** calculation reveals that the Co nanoparticles can induce the formation of a unique Co–S–Na molecular layer on the Co surface,which can enable a fast reduction reaction of the ***,the prepared“branch-leaf”CNF-L@Co/S electrode exhibits a high initial specific capacity of 1201 mAh g^−1 at 0.1 C and superior rate performance.

关键词： Co nanoparticles Sodium-sulfur batteries Branch-leaf,biomimetic

基于定价因素和服务水平的公共汽电车票价制定方法--以青岛市为例

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城市交通 2024年第2期22卷 102-111页

作者：赵向宇杜光远钟朝晖夏齐交科院技术咨询(北京)有限公司北京100029 交通运输部科学研究院北京100029 青岛市交通运输局运输事业发展中心山东青岛266061

面对城市公共汽电车客运量下滑严重、财政补贴额度大幅上涨的压力,亟须制定符合新常态下城市发展特征的可持续公共汽电车票价政策。将公益性和市场化相结合,统筹考虑政府负担能力、居民经济承受能力和公共汽电车与城市轨道交通比价关系... 详细信息

面对城市公共汽电车客运量下滑严重、财政补贴额度大幅上涨的压力,亟须制定符合新常态下城市发展特征的可持续公共汽电车票价政策。将公益性和市场化相结合,统筹考虑政府负担能力、居民经济承受能力和公共汽电车与城市轨道交通比价关系,对公共汽电车票价制定方法开展研究。以青岛市为例,通过与同类型城市进行对比,分别讨论人次票价成本比、运营补贴占城市财政收入比例、公共汽电车出行支出占居民收入比例、公共汽电车与城市轨道交通比价关系4个定价因素对公共汽电车票价制定的影响,确定平均人次票价初步方案为1.35元。构建由准则层4个指标、指标层14项指标构成的公共汽电车服务水平评价指标体系,基于服务水平综合评价结果调校确定平均人次票价为1.40元。结果显示,在这一票价水平下4个定价因素均处于青岛市合理目标范围。

关键词：公共汽电车票制票价票价成本比运营补贴平均人次票价服务水平青岛市

Deep kernel extreme learning machine classifier based on the improved sparrow search algorithm

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The Journal of China Universities of Posts and Telecommunications 2024年第3期31卷 15-29页

作者： Zhao guangyuan Lei Yu School of Automation Xi'an University of Posts and TelecommunicationsXi'an 710000China

In the classification problem,deep kernel extreme learning machine(DKELM)has the characteristics of efficient processing and superior performance,but its parameters optimization is *** improve the classification accuracy of DKELM,a DKELM algorithm optimized by the improved sparrow search algorithm(ISSA),named as ISSA-DKELM,is proposed in this *** at the parameter selection problem of DKELM,the DKELM classifier is constructed by using the optimal parameters obtained by ISSA *** order to make up for the shortcomings of the basic sparrow search algorithm(SSA),the chaotic transformation is first applied to initialize the sparrow ***,the position of the discoverer sparrow population is dynamically adjusted.A learning operator in the teaching-learning-based algorithm is fused to improve the position update operation of the ***,the Gaussian mutation strategy is added in the later iteration of the algorithm to make the sparrow jump out of local *** experimental results show that the proposed DKELM classifier is feasible and effective,and compared with other classification algorithms,the proposed DKELM algorithm aciheves better test accuracy.

关键词： deep kernel extreme learning machine(DKELM) improved sparrow search algorithm(ISSA) classifier parameters optimization

Utilizing a metal-forging inspired chain combing strategy to enhance properties and expand applications of Nylon 66 plastic via heat inducing

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Nano Research 2024年第3期17卷 2164-2171页

作者： Junyu Yang Jiangwei Zhang Nan Wang guangyuan Zhou Division of Energy Materials Daglian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Innovation Center of Energy Material and Chemistry College of Chemistry and Chemical EngineeringInner Mongolia UniversityHohhot 010021China

The mechanical properties of engineering plastics can be enhanced through effective surface mechanical treatment(SMT),which can be applied to various types of engineering plastics,eliminating the limitations of conventional polymer processing and could potentially extend their applications and improve their performance and reliability as structural-functional *** by metal forging,this work proposes a simple and effective SMT strategy to enhance the mechanical properties of polyamide 66(PA66).Tensile tests have shown that SMTed PA66 samples exhibit significant improvements in both Young’s modulus and ultimate tensile strength(UTS),with a 2104 MPa Young’s modulus,almost double that of the pristine samples,and a 35.56%increase in UTS,reaching 183 ***,the modulus within the localized SMTed surface layer could reach up to 14 GPa,which is approximately 14 times higher than that of the pristine *** Vickers hardness within the localized SMTed surface layer can be doubled,reaching 10.72 Hv,and the crystallinity can increase by approximately 20%compared to the untreated ***,force field molecular dynamics(FFMD)simulations were conducted to investigate the ternary relationship between the SMT method,PA66’s molecular structure,and its *** combination of MD simulations and versatile structural characterizations provides evidence that the SMT method’s mechanism,under heat induction,results in a chain-combing procedure that changes the polymer’s molecular morphology microscopically and enhances its mechanical properties macroscopically.

关键词： Nylon 66 mechanical properties hardness crystallinity structural characterizations molecular dynamics simulation

Supplementation of alanine improves biomass accumulation and lipid production of Chlorella pyrenoidosa by increasing the respiratory and metabolic processes

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Journal of Oceanology and Limnology 2024年第2期42卷 570-579页

作者： Yongfu LI Tianze ZHAO Wei SUN Ruiwen GAO guangyuan MA Jiangsu Province Engineering Research Center for Marine Bioresources Sustainable Utilization Key Laboratory of Marine Hazards ForecastingMinistry of Natural ResourcesHohai UniversityNanjing 210098China College of Oceanography Hohai UniversityNanjing 210098China Jiangsu Innovation Center of Marine Bioresources Jiangsu Coast Development Group Co.Ltd.Nanjing 210019China

The function of exogenous alanine(Ala)in regulating biomass accumulation,lipid production,photosynthesis,and respiration in Chlorella pyrenoidosa was *** shows that the supplementation of Ala increased *** biomass and lipid production in an 8-d batch *** concentration of 10 mmol/L of Ala was optimum and increased the microalgal cell biomass and lipid content by 39.3%and 21.4%,respectively,compared with that in the control(0-mmol/L Ala).Ala supplementation reduced photosynthetic activity while boosting respiratory activity and pyruvate levels,indicating that *** used exogenous Ala for biomass accumulation through the respiratory metabolic *** accelerated respiratory metabolism due to Ala supplementation elevated the substrate pool and improved the lipogenic gene expression,promoting lipid production at *** study provided a novel method for increasing biomass accumulation and lipid production and elucidated the role of Ala in regulating lipid production.

关键词： alanine Chlorella pyrenoidosa lipid respiration lipogenic gene

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猕猴桃贮藏期电参数和生理参数的变化

农业机械学报 2012年第1期43卷 127-133页

作者：唐燕杜光源张继澍西北农林科技大学生命学院陕西杨凌712100 西北农林科技大学理学院陕西杨凌712100

以室温(20℃)贮藏的"秦美"猕猴桃为研究材料,在贮藏期间获取果实复阻抗、并联等效电容和阻抗相角值的同时,同步测定果实硬度等12个生理参数。结果表明,猕猴桃复阻抗在贮藏末期显著下降,并联等效电容在贮藏末期显著上升。随着贮藏时间的... 详细信息

以室温(20℃)贮藏的"秦美"猕猴桃为研究材料,在贮藏期间获取果实复阻抗、并联等效电容和阻抗相角值的同时,同步测定果实硬度等12个生理参数。结果表明,猕猴桃复阻抗在贮藏末期显著下降,并联等效电容在贮藏末期显著上升。随着贮藏时间的延长,果实的硬度、可滴定酸质量浓度都呈下降趋势,可溶性固形物含量、相对电导率呈上升趋势,淀粉、纤维素质量比的减小与果实硬度的下降呈正相关。在特征频率0.1 kHz下,复阻抗可量化硬度等8个生理参数,阻抗相角可量化5个生理参数,在特征频率1 MHz和1.58 MHz频率下,并联等效电容可量化6个生理参数。

关键词：猕猴桃贮藏电参数生理参数特征频率

Ultrathin two-dimensional medium-entropy oxide as a highly efficient and stable electrocatalyst for oxygen evolution reaction

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Nano Research 2024年第4期17卷 2555-2562页

作者： guangyuan Yan Tianlu Wang Biwei Zhao Wenjing Gao Tong Wu Liming Ou School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China

Medium-entropy oxides(MEOs)with broad compositional tunability and entropy-driven structural stability,are receiving booming attention as a promising candidate for oxygen evolution reaction(OER)***,ultrathin two-dimensional(2D)nanostructure offers extremely large specific surface area and is therefore considered to be an ideal catalyst ***,it remains a grant challenge to synthesize ultrathin 2D MEOs due to distinct nucleation and growth kinetics of constituent multimetallic elements in 2D anisotropic *** this work,an ultrathin 2D MEO(MnFeCoNi)O was successfully synthesized by a facile and low-temperature ionic layer epitaxy *** from multi-metal synergistic effects within ultrathin 2D nanostructure,this 2D MEO(MnFeCoNi)O revealed excellent OER electrocatalytic performance with a quite low overpotential of 117 mV at 10 mA·cm^(-2) and an impressive stability for 120 h continuous operation with only 6.9%***,the extremely high mass activity(5584.3 A·g^(-1))was three orders of magnitude higher than benchmark RuO_(2)(3.4 A·g^(-1))at the same overpotential of 117 *** work opens up a new avenue for developing highly efficient and stable electrocatalysts by creating 2D nanostructured MEOs.

关键词： medium-entropy oxide two-dimensional nanomaterials ionic layer epitaxy oxygen evolution reaction electrocatalysis

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猕猴桃电特性与生理特性关系研究

农业机械学报 2012年第3期43卷 97-102页

作者：唐燕杜光源张继澍西北农林科技大学生命学院陕西杨凌712100 西北农林科技大学理学院陕西杨凌712100

为了研究室温(20℃)贮藏下"秦美"猕猴桃电参数与生理参数的相关性,探讨用电特性无损检测生理特性的可行性,用SPSS软件对果实复阻抗等6个电参数和果实硬度等12个生理参数之间进行了相关性分析。结果显示,复阻抗和电容在特征频率下能量化... 详细信息

为了研究室温(20℃)贮藏下"秦美"猕猴桃电参数与生理参数的相关性,探讨用电特性无损检测生理特性的可行性,用SPSS软件对果实复阻抗等6个电参数和果实硬度等12个生理参数之间进行了相关性分析。结果显示,复阻抗和电容在特征频率下能量化的生理参数多,其中复阻抗能量化硬度等8个生理参数,电容能量化7个生理参数,而电感不能量化任何一个生理参数。阻抗相角量化可滴定酸含量、相对电导率、淀粉含量和纤维素含量的可靠性高。除了淀粉酶活性、PE活性、PG活性、Cx活性之外,其余生理参数都可在特征频率下用敏感电参数来量化。

关键词：猕猴桃电特性生理特性特征频率敏感电参数

Flexible,high-density,laminated ECoG electrode array for high spatiotemporal resolution foci diagnostic localization of refractory epilepsy

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Bio-Design and Manufacturing 2024年第4期7卷 388-398页

作者： Yafeng Liu Zhouheng Wang Yang Jiao Ying Chen guangyuan Xu Yinji Ma Xue Feng Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Laboratory of Flexible Electronics Technology Tsinghua UniversityBeijing 100084China College of Artificial Intelligence Southwest UniversityChongqing 400715China Institute of Flexible Electronics Technology of THU Jiaxing 314000China Qiantang Science and Technology Innovation Center Hangzhou 310016China School of Artificial Intelligence Beijing University of Posts and TelecommunicationsBeijing 100876China

High spatiotemporal resolution brain electrical signals are critical for basic neuroscience research and high-precision focus diagnostic localization,as the spatial scale of some pathologic signals is at the submillimeter or micrometer *** entails connecting hundreds or thousands of electrode wires on a limited *** study reported a class of flexible,ultrathin,highdensity electrocorticogram(ECoG)electrode *** challenge of a large number of wiring arrangements was overcome by a laminated structure design and processing technology *** flexible,ultrathin,high-density ECoG electrode array was conformably attached to the cortex for reliable,high spatial resolution electrophysiologic *** minimum spacing between electrodes was 15μm,comparable to the diameter of a single *** hundred electrodes were prepared with an electrode density of 4444 mm^(-2).In focal epilepsy surgery,the flexible,high-density,laminated ECoG electrode array with 36 electrodes was applied to collect epileptic spike waves inrabbits,improving the positioning accuracy of epilepsy lesions from the centimeter to the submillimeter *** flexible,high-density,laminated ECoG electrode array has potential clinical applications in intractable epilepsy and other neurologic diseases requiring high-precision electroencephalogram acquisition.

关键词： Electrocorticogram(ECoG)electrode Epilepsy High density High resolution Laminated structure

Covalent organic framework monolayer:Accurate syntheses and advanced application

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Nano Research 2024年第7期17卷 6603-6618页

作者： guangyuan Feng Xiaojuan Li Miao Zhang Jiabi Xu Zhiping Liu Lingli Wu Shengbin Lei Key Laboratory of Organic Integrated Circuit Ministry of Education and Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of Science and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China Medical College Northwest Minzu UniversityLanzhou 730000China School of Chemistry and Chemical Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

Covalent organic framework(COF)monolayers,with atomically thin,ordered networks,and rich functionality,are widely studied due to their unusual structure/property ***,synthesizing COF monolayer has remained an unmet challenge due to the difficulty of controlling reactions at the monolayer limit with large-scale *** identification and development of new reactions and polymerization conditions are critical for the further advancement of COF monolayer ***,as one-molecule-thick a freestanding films,COF monolayer offers an ideal material *** advanced applications of COF monolayer have been explored in recent *** review provides an overview of the current state of precise synthetic strategies for COF monolayer,highlighting the advantages and limitations of different synthetic approaches and key challenges related to enhancing quality,and emphasizing the unique benefits of COF monolayer as both an ideal model system and for advanced applications.

关键词： covalent organic frameworks monolayer accurate syntheses advanced application