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Application of different fiber structures and arrangements by electrospinning in triboelectric nanogenerators

Chinese Journal of Chemical engineering 2024年第5期69卷 177-191页

作者： Hebin Li Zifei Meng Dehua Wang ye Lu Longlong Jiang le Zhang Hanbin Wang Xiaoxiong Wang College of Physics Qingdao UniversityQingdao 266071China School of Physics and electronic engineering Jiangsu Normal UniversityXuzhouJiangsu 221000China Microsystem&Terahertz Research Center China Academy of Engineering Physics(CAEP)Chengdu 610200China Institute of electronic engineering China Academy of Engineering Physics(CAEP)Mianyang 621900China University-Industry Joint Center for Ocean Observation and Broadband Communication College of PhysicsQingdao UniversityQingdao 266071China Weihai Innovation Research Institute of Qingdao University Weihai 264200China Collaborative Innovation Center for eco-Textiles of Shandong Province and State Key Laboratory of Bio-Fibers and Eco-TextilesQingdao UniversityQingdao 266071China

In recent years,nanogenerators(NGs)have attracted wide attention in the energy field,among which triboelectric nanogenerators(TeNGs)have shown superior *** reports of electrospinning(eS)-based TeNGs have been reported,but there is a lack of deep analysis of the designing method from microstructure,limiting the creative of new eS-based *** TeNGs use polymer materials to achieve corresponding design,which requires structural design of polymer *** existing polymer molding design methods include macroscopic molding methods,such as injection,compression,extrusion,calendering,etc.,combined with liquid-solid changes such as soluting and melting;it also includes micro-nano molding technology,such as melt-blown method,coagulation bath method,eS method,and nanoimprint *** fact,eS technology has good controllability of thickness dimension and rich means of nanoscale structure *** present,these characteristics have not been ***,in this paper,we combine recent reports with some microstructure regulation functions of eS to establish a more general TeNGs design *** on the rich microstructure research results in the field of eS,much more new types of TeNGs can be designed in the future.

关键词： Triboelectric nanogenerators electrospinning Fiber microstructure regulation Nanomaterials Membranes Global optimization

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Some Mean con.ergence Theorems for the Maximum of Normed Double Sums of Banach Space Valued Random elements

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Acta Mathematica Sinica,english Series 2024年第7期40卷 1727-1740页

作者： Andrew ROSALSKy.le Van THANH Nguyen Thi THUy Department of Statistics University of FloridaGainesvilleFL 32611-8545USA Department of Mathematics Vinh UniversityVinhNghe AnViet Nam High School for Gifted Students Vinh UniversityVinhNghe AnViet Nam

In this correspondence,we establish mean con.ergence theorems for the maximum of normed double sums of Banach space valued random *** of the results pertain to random elements which are *** expand and improve a number of particular cases in the literature on mean con.ergence of random elements in Banach *** of the main contributions of the paper is to simplify and improve a recent result of Li,Presnell,and Rosalsky[Journal of Mathematical Inequalities,16,117–126(2022)].A new maximal inequality for double sums of M-dependent random elements is proved which may be of independent *** sharpness of the results is illustrated by four examples.

关键词： Double sum mean con.ergence Rademacher type p Banach space Banach space valued random element M-dependent random elements

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Masses and decays of triply-heavy pentaquarks

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Chinese Physics C 2024年第10期48卷 137-149页

作者： Chang-le Liu Wen-Xuan Zhang Duo-Jie Jia Institute of Theoretical Physics College of Physics and Electronic EngineeringNorthwest Normal UniversityLanzhou 730070China General education Center Qinghai Institute of TechnologyXining 810000China Lanzhou Center for Theoretical Physics Lanzhou UniversityLanzhou 730000China

In this study,we analyzed masses and decays of triply-heavy pentaquarks QQQnn(Q=b,c)in the unified MIT bag *** construct the color-spin wave functions of the triply-heavy pentaquarks and use the numerical variational method to compute all the ground-state masses of these *** excluding the scattering states in configuration spsce,we computed the decay width ratios of each decay channel relative to the maximum width for the compact pentaquark states,obtaining the main decay modes of the triply-heavy pentaquark systems.

关键词： pentaquark mass decay channels

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experimental study on the CO_(2) con.entration and age of air distribution inside tiny sleeping spaces

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Building Simulation 2024年第4期17卷 591-605页

作者： Jingying Zhang yanyan Li Haiguo yin Linfeng Liang Songmei Zu le Gao ying Zhang Angui Li School of Building Services Science and engineering Xi’an University of Architecture and TechnologyXi’anShaanxi710055China

In recent years,rapid urban development has led to capsule hotels,sleep pods,and other tiny sleeping spaces that adapt to people’s fast-paced lives,achieving maximum functionality with a very small ***,due to the small space,human metabolic pollutant(such as CO_(2))is more likely to accumulate,and the air is not easily *** this paper,a full-size experimental platform is set up with three types of ventilation modes to explore the exclusion efficiency of metabolic pollutants and the overall distribution of age of air under these ventilation *** conclusions showed that the mean values of metabolic pollutant exclusion rates for the different ventilation modalities varied very little across the spatial dimensions of the confined space but varied considerably in the area around the *** double-side attached ventilation method was the most effective in removing human metabolic pollutants,especially in the head region(CN≥0.92),while the single-wall attached ventilation method had the best air exchange efficiency(η≥0.85).This suggests an inconsistent distribution of CO_(2) and age of air,which is contrary to general common *** conclusions of this paper can guide the design of ventilation for tiny sleeping spaces.

关键词： attached ventilation mode human metabolic pollutant indoor air quality air exchange efficiency tiny sleeping spaces

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Raindrop Size Distributions in the Zhengzhou extreme Rainfall event on 20 July 2021:Temporal-Spatial Variability and Implications for Radar QPe

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Journal of Meteorological Research 2024年第3期38卷 489-503页

作者： Liman CUI Haoran LI Aifang SU yang ZHANG Xiaona LyU le XI yuanmeng ZHANG Henan Key Laboratory of Agrometeorological Support and Applied Technique China Meteorological AdministrationZhengzhou450003China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing100081China Henan Meteorological Observatory Zhengzhou450003China

In this study,a regional Parsivel OTT disdrometer network covering urban Zhengzhou and adjacent areas is employed to investigate the temporal-spatial variability of raindrop size distributions(DSDs)in the Zhengzhou extreme rainfall event on 20 July *** rain rates observed by disdrometers and rain gauges from six operational sites are in good agreement,despite significant site-to-site variations of 24-h accumulated rainfall ranging from 198.3 to 624.1 *** Parsivel OTT observations show prominent temporal-spatial variations of DSDs,and the most drastic change was registered at Zhengzhou Station where the record-breaking hourly rainfall of 201.9 mm over 1500-1600 LST(local standard time)was *** hourly rainfall is characterized by fairly high con.entrations of large raindrops,and the mass-weighted raindrop diameter generally increases with the rain rate before reaching the equilibrium state of DSDs with the rain rate of about 50 mm h^(−1).Besides,polarimetric radar observations show the highest differential phase shift(K_(dp))and differential reflectivity(Z_(dr))near surface over Zhengzhou Station from 1500 to 1600 *** light of the remarkable temporal-spatial variability of DSDs,a reflectivity-grouped fitting approach is proposed to optimize the reflectivity-rain rate(Z-R)parameterization for radar quantitative precipitation estimation(QPe),and the rain gauge measurements are used for *** results show an increase of mean bias ratio from 0.57 to 0.79 and a decrease of root-mean-square error from 23.69 to 18.36 for the rainfall intensity above 20.0 mm h^(−1),as compared with the fixed Z-R *** study reveals the drastic temporal-spatial variations of rain microphysics during the Zhengzhou extreme rainfall event and warrants the promise of using reflectivity-grouped fitting Z-R relationships for radar QPe of such events.

关键词： extreme rainfall raindrop size distribution radar quantitative precipitation estimation(QPe)

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Progress in research on metal-based materials in stabilized Zn anodes

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Rare Metals 2024年第1期43卷 20-40页

作者： le Li Shao-Feng Jia Ming-Hui Cao yong-Qiang Ji Heng-Wei Qiu Dan Zhang Shaanxi Key Laboratory of Industrial Automation School of Mechanical EngineeringShaanxi University of TechnologyHanzhong 723001China School of electronic and Information engineering Qingdao UniversityQingdao 266071China State Key Laboratory for Artifcial Microstructure and Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Department of Chemistry Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical BiologyTsinghua UniversityBeijing 100084China Shaanxi Key Laboratory of Catalysis School of Chemistry and Environment ScienceShaanxi University of TechnologyHanzhong 723001China

Aqueous zinc-ion batteries(ZIBs) combine the benefits of metallic Zn anodes with those of aqueous electrolytes and are well suited for large-scale energy storage because of their inherent high safety, cost-effectiveness, and eco-friendliness. Currently, the practical application of such batteries is hindered by the poor cycling performance of Zn anodes due to uncontrolled dendrite formation and severe side reactions, although recent reports suggest that these problems can be mitigated through the modification of Zn anodes with metal-based *** that the mechanisms of improving Zn deposition and the structural evolution of metal-based materials have not been systematically reviewed, we herein systematically overview the metal-based materials used to stabilize Zn anodes, starting with a brief summary of the anode working mechanism and the challenges faced by stabilized Zn anodes. Subsequently, the design principles of Zn anodes stabilized by metal-based materials and the related recent progress are reviewed, and the key challenges and perspectives for the future development of such Zn anodes are proposed.

关键词： Zinc-ion batteries(ZIBs) Zn anode Metalbased materials Alloying metal Stabilized Zn anodes

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Characteristics and quality of clinical practice guidelines for diabetic kidney disease:a systematic review

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Journal of Traditional Chinese Medicine 2024年第3期44卷 609-619页

作者： WANG yuhuang ZHANG le ZHANG Zhengshan yAO Zhi LI Xiyao SUN Luying LIAO Xing Department of Nephropathy and endocrine Dongzhimen HospitalBeijing University of Chinese MedicineBeijing 100010China Centre for evidence-Based Chinese Medicine Institute of Basic Research in Clinical MedicineChina Academy of Chinese Medical SciencesBeijing 100010China Department of endocrine One Zone Fangshan HospitalBeijing University of Chinese MedicineBeijing 102400China

OBJeCTIVe:To assess the quality of Clinical practice guidelines(CPGs)in the con.ext of diabetic kidney disease(DKD)and determine whether any factors affect the ***:We searched eight databases along with five international and national organizations to develop or archive guidelines from their inception to July 2023,with an additional search of *** the authoritative organizations related to *** and con.ensus statements created using direct differential diagnosis or therapy for DKD were included without language *** quality was evaluated by four reviewers using the Appraisal of Guidelines for Research and evaluationⅡ(AGReeⅡ)*** with the item and domain scores,the guideline was also allocated an overall quality score,which ranged from 1(lowest possible quality)to 7(highest possible quality).Moreover,an overall recommendation for use was also assigned(“recommended”,“recommended with modifications”or“not recommended”).ReSULTS:A total of 16 CPGs were included,of which 14 were from Asia and the remaining two from *** two CPGs were updated in the third *** CPGs were recommended for use because their primary domains scored in the medium or high ***,five CPGs were recommended with modifications as the stakeholder involvement,applicability,and editorial independence domains were evaluated as low *** all domains,the lowest average score was for rigour of development(33%),followed by application(36%),and stakeholder involvement(51%).The highest average score was for scope and purpose(79%),followed by clarity of presentation(75%).None of the CPGs considered the patient's viewpoint,and six of 16 CPGs did not use any grading system to translate the evidence into ***,only three of 16 CPGs shared search strategy,and eight of 16 CPGs did not declare a funding ***:According to the AGRee II evaluation,more than one in four CPGs for DKD had poo

关键词： diabetic nephropathies practice guideline appraisal of guidelines for research and evaluation II quality assessment systematic review

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Observation and analysis of positive leader re-illumination in a 10 m ultra-high voltage transmission line gap under switching impulse voltages

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Plasma Science and Technology 2024年第10期26卷 93-100页

作者： Biao HUANG Xuan ZHOU She WANG Chijie ZHUANG Rong ZeNG le DeNG eliet engineering School Changsha University of Science&TechnologyChangsha 410114People’s Republic of China State Key Laboratory of Disaster Prevention&Reduction for Power Grid Changsha University of Science&TechnologyChangsha 410114People’s Republic of China China International engineering consulting Co. Ltd.Beijing 100048People’s Republic of China Department of electrical engineering Tsinghua UniversityBeijing 100084People’s Republic of China

The leader propagation is one of the most important stages in long air gap *** mechanism behind leader re-illumination remains *** high humidity conditions(20.0–30.1 g/m^(3)),we have conducted experiments of long sparks in a 10 m ultra-high voltage(UHV)transmission line gap under switching impulse *** positive leaders predominantly propagate discontinuously,with almost no significantly continuous propagation *** leader channels are intensely luminous and each elongation segment is straight,with streamers resembling the“branch type”which differs from the“diffuse type”streamers at the front of continuous propagation *** distribution of the propagation velocities is highly random(3.7–18.4 cm/μs),and the average velocity(9.2 cm/μs)significantly exceeds that of continuous propagation(1.5–2.0 cm/μs).Analysis suggests that the current-velocity models suitable for continuous leader propagation do not align well with the experimental data in re-illumination *** on the discharge current waveforms and optical images,it is speculated that the newly elongated leader in re-illumination mode does not evolve gradually from the stem(about 1 cm)but rather evolves overall from a thermal channel much longer than stem.

关键词： long air gap discharge positive leader re-illumination discontinuous leader propagation

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A review of covalent organic frameworks for metal ion fluorescence sensing

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Chinese Chemical letters 2024年第8期35卷 74-83页

作者： Deshuai Zhen Chunlin Liu Qiuhui Deng Shaoqi Zhang Ningman yuan le Li yu Liu Hunan Key Laboratory of Typical environment Pollution and Health Hazards School of Public HealthHengyang Medical SchoolUniversity of South ChinaHengyang 421001China State Key Laboratory of Chemo/Biosensing and Chemometrics School of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

The con.entration of metallic elements is closely associated with overall ***,the discharge of untreated industrial wastewater can lead to metal-containing pollutants entering the human body through the food chain,disrupting the organism’s homeostasis and posing a risk to human ***-valent organic framework materials(COFs)have emerged as a novel porous material for detecting or adsorbing metal ions due to their unique pore structure,topological structure and flexible *** paper summarizes the role,toxicity,and sources of metal ions related to human health,as well as the design,synthesis and performance of COFs fluorescent materials for detecting these *** inter-action mechanism of different fluorescent COFs and metal ions are ***,the remaining challenges and prospects of COFs fluorescence sensors are *** believe this review will be useful in directing the development of fluorescent COFs towards metal ions.

关键词： Covalent organic frameworks Metal ion Fluorescence Sensing Toxicity

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Study on the green extraction of corncob xylan by deep eutectic solvent

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Grain & Oil Science and Technology 2024年第1期7卷 50-59页

作者： Bingyu Jiao le Wang Haitao Gui Zifu Ni Rong Du yuansen Hu School of Biological engineering National Engineering Research Center of Wheat and Corn Further ProcessingZhengzhou 450001China

Corn as one of the world's major food crops,its by-product corn cob is also rich in ***,the unreasonable utilization of corn cob often causes the environmental pollution,waste of resources and other *** one of the most abundant polymers in nature,xylan is widely used in food,medicine,materials and other *** cob is rich in xylan,which is an ideal raw material for extracting ***,the intractable lignin is covalently linked to xylan,which increases the difficulty of xylan *** has been reported that the deep eutectic solvent(DeS)could preferentially dissolve lignin in biomass,thereby dissolving the ***,the xylan in the extract was separated by ethanol precipitation *** xylan precipitate was obtained after centrifugation,while the supernatant was *** components of the supernatant after ethanol precipitation were separated by the rotary *** ethanol,water and DeS were collected for the subsequent extraction of corn cob *** this study,a novel way was provided for the green production of corn cob *** DeS was used to extract xylan from corn cob which was used as the raw *** effects of solid-liquid ratio,reaction time,reaction temperature and water con.ent of DeS on the extraction rate of corn cob xylan were investigated by the single factor ***,the orthogonal test was designed to optimize the xylan extraction *** structure of corn cob xylan was analyzed and *** results showed that the optimum extraction conditions of corn cob xylan were as follows:the ratio of corn cob to DeS was 1:15(g:mL),the extraction time was 3 h,the extraction temperature was 60℃,and the water con.ent of DeS was 70%.Under these conditions,the extraction rate of xylan was 16.46%.The extracted corn cob xylan was distinctive triple helix of polysaccharide,which was similar to the structure of commercially available *** was effectively and workably extracted from corn

关键词： Corncob Deep eutectic solvent Xylan Process optimization extraction

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