检索结果-南通市图书馆

系统风险核心问题、形成机制及中国特色化解方案——实体经济与虚拟经济视角

在线全文

学校读者我要写书评

暂无评论

南开经济研究 2024年第5期 31-48页

作者：刘晓欣李军帅刘莲南开大学经济学院 300071 南开大学虚拟经济与管理研究中心 300071 中国中信金融资产管理股份有限公司 100033

走中国特色金融发展之路,防范化解金融风险,是中国经济稳健高质量发展的保障。本文基于实体经济与虚拟经济视角探讨系统风险核心问题、形成机制及中国特色化解方案,以期完善金融风险防范和处置机制。通过研究发现:首先,系统风险的核心... 详细信息

走中国特色金融发展之路,防范化解金融风险,是中国经济稳健高质量发展的保障。本文基于实体经济与虚拟经济视角探讨系统风险核心问题、形成机制及中国特色化解方案,以期完善金融风险防范和处置机制。通过研究发现:首先,系统风险的核心问题在于虚拟经济领域不良资产不断积累。借贷资本在实体经济与虚拟经济之间运行具有不同规律,虚拟经济领域自我循环引发的庞氏债务膨胀及其违约成为系统风险更加重要的风险源。其次,系统风险的形成机制源于个别风险系统化。本文从金融风险管理视角揭示了金融创新工具对冲或回避个别风险而导致风险在系统中寄存和持续积累的过程,其会加速债务违约泛化,引发金融危机。最后,中国金融风险处置实践彰显了中国特色社会主义制度优势,未来导向应在宏观上坚持金融服务实体经济,在微观上避免风险对冲的创新技术泛化,风险处置目标坚持风险化解与经济增长同步,风险处置方式强调政策性与市场化相结合。

关键词：系统风险不良资产实体经济虚拟经济中国方案

同方期刊数据库

泡沫镍上生长的具有三明治纳米结构的MnCo_(2)O_(4)@NiCoMnS_(4)用于高性能水系非对称超级电容器

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2024年第3期67卷 816-823页

作者：陈勇超李亚丽董云霞李东昊沈思锦胡继东付玉军贺德衍栗军帅 LONGi Institute of Future Technology and School of Materials&EnergyLanzhou UniversityLanzhou 730000China

本文介绍了一种由水热生长的MnCo_(2)O_(4)(MCO)纳米线以及随后电沉积的NiCoMnS_(4)(NCMS)纳米片组成的高性能超级电容器电极材料,即泡沫镍上生长的MCO@NCMS.由于其多孔和互联的纳米结构以及MCO和NCMS的协同效应,在1 mA cm^(-2)处实现了... 详细信息

本文介绍了一种由水热生长的MnCo_(2)O_(4)(MCO)纳米线以及随后电沉积的NiCoMnS_(4)(NCMS)纳米片组成的高性能超级电容器电极材料,即泡沫镍上生长的MCO@NCMS.由于其多孔和互联的纳米结构以及MCO和NCMS的协同效应,在1 mA cm^(-2)处实现了12,020.8 mF cm^(-2)的高电容,并展现出良好的倍率性能以及循环稳定性.电化学测试表明,组装成的水性非对称超级电容器在0.800 mW cm^(-2)的功率密度下,达到0.611 mW h cm^(-2)的高能量密度并具有良好的循环稳定性,即在15,000次充放电循环后,容量保持率可达90%,且保持100%的库仑效率.

关键词： sandwich structure high energy density transition metal sulfides aqueous asymmetric supercapacitor transition metal oxides

Recent advances towards aqueous hydrogen peroxide formation in a direct current plasma-liquid system

在线全文

学校读者我要写书评

暂无评论

High Voltage 2022年第3期7卷 405-419页

作者： Qiang Chen junshuai li Qiang Chen Kostya(Ken)Ostrikov Shenzhen Research Institute of Xiamen University Institute of Electromagnetics and AcousticsFujian Provincial Key Laboratory of Plasma and Magnetic ResonanceKey Laboratory of Electromagnetic Wave Science and Detection TechnologyXiamen UniversityXiamenChina LONGi Institute of Future Technology and School of Materials&Energy Lanzhou UniversityLanzhouChina Laboratory of Plasma Physics and Materials Beijing Institute of Graphic CommunicationBeijingChina School of Chemistry and Physics and QUT Centre for Materials Science Queensland University of Technology(QUT)BrisbaneQueenslandAustralia

The aqueous phase hydrogen peroxide(H_(2)O_(2aq))produced from the plasma-liquid interactions can directly or synergistically(with other substances)affect the liquid chemistry,and therefore it is important to unfold the H_(2)O_(2aq)formation ***,up to now,a consensus on the H_(2)O_(2aq)formation mechanism is not *** review aims to survey the recent advances on the understanding of the H_(2)O_(2aq)formation mechanism in the system of a direct current discharge plasma operated over a liquid *** and experimental analyses indicate that the recombination of dissolved OH radicals(OHaq)is the dominant process for the H_(2)O_(2aq)formation,while the purported plasma-induced photolysis of water and the dissolution of gaseous H_(2)O_(2)are ruled out.

关键词： hydrogen liquid system

High-performance aqueous asymmetric supercapacitors based on the cathode of one-step electrodeposited cracked bark-shaped nickel manganese sulfides on activated carbon cloth

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2022年第2期65卷 293-301页

作者： ADIL Emin XIE WenLu LONG Xiao WANG Xiao SONG XiaoQiang CHEN Yue FU YuJun li junshuai li Yali HE DeYan Key Laboratory of Special Function Materials&Structure Design of the Ministry of Education and School of Materials&EnergyLanzhou UniversityLanzhou 730000China

In this work,we report a high-performance self-standing supercapacitor electrode of mixed nickel manganese sulfides (NMSs)with a cracked-bark shape grown by one-step electrochemical deposition on activated carbon cloth (ACC).The electrode possesses outstanding electrochemical properties,including a high specific capacitance of up to 3142.8 F g^(-1)at 1.0 A g^(-1),the high-rate performance (~1206.8 F g^(-1)at 60.0 A g^(-1)),and cycle stability (~92.3%capacitance retention after 8000 cycles at8 A g^(-1)).An asymmetric supercapacitor assembled using NMSs on ACC as the cathode,activated carbon on carbon cloth as the anode and 1.0 mol L;KOH as the electrolyte delivers a high energy density of 111.2 W h kg^(-1)at 800.0 W kg^(-1)and the prominent cycling performance of~93.2%capacitance retention after 10000 cycles at 5 A g^(-1)with the Columbic efficiency of around 100%during these 10000 *** high performance and facile preparation indicate that the NMSs on ACC hold a huge potential as the electrode for supercapacitors.

关键词： aqueous asymmetric supercapacitors nickel manganese sulphides high specific capacitance high energy density long cycle stability

Enhancement of photoelectric performance for CsPbI2Br solar cells by the synergistic effect of binary additives

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2023年第1期9卷 27-34页

作者： Qiulu Chen like lin Yanzhou Wang Zhe Gao Yujun Fu Qiming liu junshuai li Deyan He School of Materials and Energy LONGi Institute of Future TechnologyLanzhou UniversityLanzhou730000China College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China

CsPbI_(2)Br-based perovskite solar cells(PSCs)have attracted much attention because of their excellent phase stability and appropriate ***,numerous defects of undercoordinated ions or mobile species are the sites of carrier nonradiative recombination,causing a low power conversion efficiency(PCE).In this work,NaCl and nitrogen-doped graphene quantum dots(N-GQDs)as binary additives are introduced into perovskite precursor to obtain high-quality photoactive *** ion(Cl^(-))is incorporated into perovskite due to the same physical and chemical properties as bromine(Br^(-)),that align the energy level of CsPbI_(2)Br,decrease the energy barrier between perovskite and P3HT to promote carrier transport and extraction,hence result in the reduced energy ***,because of its good conductivity,N-GQDs at grain boundaries can rapidly conduct photogenerated electrons to SnO_(2),suppressing carrier recombination at grain ***,the trap state density of the CsPbI_(2)Br film with binary additives is reduced,which could prolong the carrier lifetime,and improve surface *** a result,a PCE of 15.37%for CsPbI_(2)Br PSCs with binary additives is obtained,which shows~22.76%relative increment compare with the pristine ***,a simple and convenient optimization strategy of binary additives for PSCs is proposed in this work.

关键词： All-inorganic perovskite solar cells Synergistic effect Carrier transport Binary additives engineering

Improved comprehensive performance of CsPbI_(2) Br perovskite solar cells by modifying the photoactive layers with carbon nanodots

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materiomics 2022年第2期8卷 358-365页

作者： Yanzhou Wang Caidong Xie Xincheng Yao Qiulu Chen Weining liu Yujun Fu Qiming liu junshuai li Yali li Deyan He Key Laboratory of Special Function Materials&Structure Design of the Ministry of Education And School of Materials&EnergyLanzhou University222 South Tianshui RoadLanzhou730000China

Introducing additives into perovskite layers is an effective method to enhance the power conversion efficiency(PCE)and operation stability of perovskite solar cells(PSCs).Herein,we reported an addition of carbon nanodots(CNDs)into the CsPbI_(2) Br photoactive layer to boost performance of the related *** is found that the trap density can be notably suppressed,and the crystallinity can be enhanced after introducing CNDs with an optimal *** PSC with 1.0 wt%addition of CNDs delivers a notable improved average PCE of 13.77%(the highest PCE:14.69%)from that of 12.14%for the control device without CND ***,the CND-added CsPbI 2 Br PSCs exhibit superior stability,i.e.,~86% retention of the initial PCE after 160 h aging in air with the humidity of 20%-30%,to the control device.

关键词： CsPbI_(2)Br perovskite Solar cells Carbon nanodots Power conversion efficiency Stability

Solution-processed silicon/SnCl_(2)-treated Ti_(3)C_(2)T_(x) MXene Schottky junction solar cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2022年第4期65卷 896-903页

作者： Xincheng Yao Lujie Yin Yanzhou Wang Weining liu Caidong Xie Qiming liu Yujun Fu Yali li junshuai li Deyan He Key Laboratory of Special Function Materials&Structure Design of Ministry of Education and School of Materials&EnergyLanzhou UniversityLanzhou730000China

In this study,a novel photovoltaic cell based on the Ti_(3)C_(2)T_(x) MXene/n-type silicon(n-Si)Schottky junction is developed by a simple solution-processed method of drop-casting the Ti_(3)C_(2)T_(x) MXene ethanol suspension onto the surface of n-Si wafers and the subsequent natural drying in *** demonstration device with a simple configuration of Ag(top electrode)/Ti_(3)C_(2)T_(x)/n-Si/In:Ga(back electrode)delivers a power conversion efficiency(PCE)of 5.70%with a short-circuit current density(Jsc)of 20.68 mA cm^(−2),open-circuit voltage(V_(oc))of 0.530 V and fill factor(FF)of 52.0%under AM 1.5G *** treating the MXene layer with the SnCl_(2) aqueous solution,an improved PCE to 6.95%(J_(sc):23.04 mA cm^(−2);V_(oc):0.536 V;FF:56.2%)can be achieved because of the reduced light reflection,improved quality of junction and electrical contact,as well as the increased carrier lifetime/suppressed carrier *** the simple device configuration,facile preparation and huge potential for performance improvement,this work is believed to provide valuable exploration of developing novel solar cells.

关键词： Ti_(3)C_(2)T_(x)MXene silicon solar cells Schottky junction drop-casting

High-performance nitrogen and sulfur co-doped nanotube-like carbon anodes for sodium ion hybrid capacitors

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第9期31卷 2219-2224页

作者： Yongqiang Ding Yali li junshuai li Xingbin Yan Key Laboratory of Special Function Materials&Structure Design of the Ministry of Education School of Physical Science&TechnologyLanzhou UniversityLanzhou 730000China Laboratory of Clean Energy Chemistry and Materials State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Sodium ion hybrid capacitors are of great concern in large-scale and cost-effective electrical energy storage owing to their high energy and power densities,as well as natural abundance and wide distribution of ***,it is difficult to find a well-pleasing anode material that matches the high-performance cathode materials to achieve good energy and power output for sodium ion hybrid *** this paper,nitrogen and sulfur co-doped nanotube-like carbon prepared by a simple carbonization process of high sulfur-loaded polyaniline nanotubes is introduced as the *** assembled sodium ion half cell based on the optimal nanotube-like carbon delivers a high reversible capacity of ~304.8 mAh/g at 0.2 A/g and an excellent rate performance of ~124.8 mAh/g at 10 A/g in a voltage window of 0.01-2.5 V(versus sodium/sodium ion).For the hybrid capacitors assembled using the optimal nanotube-like carbon as the anode and high-capacity activated carbon as the cathode,high energy densities of ~100.2 Wh/kg at 250 W/kg and ~50.69 Wh/kg at 12,500 W/kg are achieved.

关键词： Sodium ion hybrid capacitors Anode Nanotube-like carbon Polyaniline nanotubes Electrical energy storage

UPLC同时测定伤科跌打片中6种有效成分的含量

在线全文

学校读者我要写书评

暂无评论

中国药品标准 2024年第4期25卷 366-371页

作者：田金苗李军帅王晓月唐雪婷赫爱平周春玲辽宁省检验检测认证中心-辽宁省药品检验检测院沈阳110036 沈阳市第四人民医院沈阳110000

目的:建立伤科跌打片中芍药苷、柚皮苷、橙皮苷、新橙皮苷、木香烃内酯、去氢木香烃内酯的UPLC测定方法。方法:色谱柱为Agilent Poroshell 120 SB-C_(18) 100 mm×4.6 mm, 2.7μm),采用二元梯度洗脱,流动相A为乙腈,B为0.1%磷酸水溶液,... 详细信息

目的:建立伤科跌打片中芍药苷、柚皮苷、橙皮苷、新橙皮苷、木香烃内酯、去氢木香烃内酯的UPLC测定方法。方法:色谱柱为Agilent Poroshell 120 SB-C_(18) 100 mm×4.6 mm, 2.7μm),采用二元梯度洗脱,流动相A为乙腈,B为0.1%磷酸水溶液,柱温为30℃,流速1.0 mL·min^(-1),检测波长为230 nm。结果:芍药苷、柚皮苷、橙皮苷、新橙皮苷、木香烃内酯、去氢木香内酯6种成分在考察的进样量范围内,进样浓度与峰面积之间呈良好的线性关系(r﹥0.999),线性范围分别为0.854 2~256.272μg·mL^(-1)(r=0.999 9)、1.057 5~317.247μg·mL^(-1)(r=0.999 9)、0.989 5~269.850μg·mL^(-1)(r=0.999 9)、1.055 6~316.689μg·mL^(-1)(r=0.999 9)、0.9051~271.527μg·mL^(-1)(r=0.999 8)、1.064 7~319.395μg·mL^(-1)(r=0.999 9);平均加样回收率分别为99.4%(RSD=1.2%),104.0%(RSD=1.2%),101.6%(RSD=1.0%),102.9%(RSD=0.4%),97.0%(RSD=1.9%),104.2%(RSD=1.0%)。收集10个生产企业共74批样品,测得样品含量分别为芍药苷0.250 8~0.653 2 mg/片,柚皮苷0.042 2~0.930 9 mg/片,橙皮苷0.590 9~3.978 0 mg/片、新橙皮苷0.021 2~0.592 6 mg/片、木香烃内酯0.002 4~0.156 7 mg/片、去氢木香内酯0.009 2~0.231 3 mg/片。结论:本法经方法学验证,可用于伤科跌打片的质量控制。

关键词： UPLC 伤科跌打片芍药苷柚皮苷橙皮苷新橙皮苷木香烃内酯去氢木香烃内酯含量测定