检索结果-南通市图书馆

Application of an amphipathic molecule at the NiO_(x)/perovskite interface for improving the efficiency and long-term stability of the inverted perovskite solar cells

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第3期78卷 454-462,I0013页

作者： Guibin Shen Hongye Dong fan Yang Xin Ren Ng Xin Li fen Lin Cheng Mu Key Laboratory of Advanced Light Conversion Materials and Biophotonics Department of ChemistryRenmin University of ChinaBeijing 100872China Solar Energy Research Institute of Singapore(SERIS) National University of SingaporeSingapore 117574Singapore State Key Laboratory of Materials Processing and Die&Mold Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117574Singapore

The presence of defects and detrimental reactions at NiO_(x)/perovskite interface extremely limit the efficiency performance and long-term stability of the perovskite solar cells(PSCs) based on NiO_(x).Herein,an amphipathic molecule Triton X100(Triton) is modified on the NiO_(x)*** hydrophilic chain of Triton as a Lewis base additive can coordinate with the Ni3+on the NiO_(x)surface which can passivate the interfacial defects and hinder the detrimental reactions at the NiO_(x)/perovskite ***,the hydrophobic chain of Triton protrudes from the NiO_(x)surface to prevent moisture from penetrating into the NiO_(x)/perovskite ***,the NiO_(x)/Triton-based devices(MAPbI3as absorbing layer) show superior moisture and thermal stability,retaining 88.4% and 64.3% of the initial power conversion efficiency after storage in air(40%-50% relative humidity(RH)) at 25 ℃ for 1070 h and in N2at 85℃ for 800 h,***,the efficiency increases from 17.59% to 19.89% because of the passivation defect and enhanced hole-extraction ***,the NiO_(x)/Triton-based PSCs with Cs_(0.05)(MA_(0.15)FA_(0.85))_(0.95)Pb(I_(0.85)Br_(0.15))3perovskite as the light-absorbing layer also exhibits better moisture and thermal stability compared to the control devices,indicating the viability of our *** particular note,a champion PCE of 22.35% and 20.46% was achieved for small-area(0.1 cm^(2)) and large-area(1.2 cm^(2)) NiO_(x)/Triton-based devices,respectively.

关键词： Perovskite solar cells NiO_(x) Defect passivation Long-term stability Amphipathic molecule

Three-Qubit Entanglement Sudden Death

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第6期49卷 1443-1448页

作者： GE Min ZHU Lin-fan QIU liang Hefei National Laboratory for Physical Sciences at Microscale Department of Modern Physics University of Science and Technology of China Hefei 230026 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China

We study entanglement dynamics of three-qubit system via negativity. Three atoms A, B, and C interact isolatedly with their own Jaynes-Cummings cavities a, b, and c. Aa system is prepared entangled with Bb and Cc, however, their mutual isolations forbid Aa interacting with system Bb and Cc. It is the same for system Bb and Cc. We show entanglement evolution of different three-qubit systems ABC, abc, Abc, and aBC and find entanglement sudden death effect.

关键词： entanglement sudden death J-C models

Quantum Fluctuation in Thermal Vacuum State for Mesoscopic LC Electric Circuit

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2000年第3期17卷 174-176页

作者： fan Hong-Yi liang Xian-Ting Department of Applied Physics Shanghai Jiao Tong UniversityShanghai 200030 Department of Material Science and Engineering University of Science and Technology of ChinaHefei 230026 Department of Physics Huaihua Teachers CollegeHuaihuaj Hu'nan 418008

We consider the quantization of LC(inductance-capacitance)circuit at a finite temperature T as any practical circuits always produce Joule heat except for *** is shown that the quantum mechanical zeropoint fluctuation... 详细信息

关键词： quantum capacitance superconductivity

Experimental study on flow characteristics of tetrahydrofuran hydrate slurry in pipelines

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 Natural Gas Chemistry 2010年第3期19卷 318-322页

作者： Wuchang Wang Shuanshi fan Deqing liang Yuxing Li Department of Storage and Transportation Engineering China University of Petroleum Qingdao 266555 Shandong China South China University of Technology Key Laboratory of Enhaneed Heat Transfer and Energy Conservation MOE Gnangzhou 510640 Guangdong China Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 Guangdong China

Tetrahydrofuran（THF） was selected as the substitute to study the flow behaviors and the mechanism of the hydrates blockage in *** slurrylike hydrates and slushlike hydrates are observed with the formation of hydrates in *** is a critical hydrate volume concentration of 50.6% for THF slurries and pipeline will be free of hydrate blockage while the hydrate volume concentration is lower than the critical volume concentration;otherwise,pipeline will be easy to be *** turbulent flow occurs and friction factors tend to be constant when the velocity reaches 1.5 m/*** then,constant values of friction factors that depend on the volume concentrations in the slurry were regressed to estimate the pressure drops of THF hydrate slurry at large mean ***,a safe region,defined according to the critical hydrate volume concentration,was proposed for THF hydrate slurry,which may provide some insight for further studying the natural gas hydrate slurries and judge whether the pipeline can be run safely or not.

关键词： hydrate slurry tetrahydrofuran flow character flow assurance

Effects of aggregate size distribution and carbon nanotubes on the mechanical properties of cemented gangue backfill samples under true triaxial compression

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 311-324页

作者： Qian Yin fan Wen Zhigang Tao Hai Pu Tianci Deng Yaoyao Meng Qingbin Meng Hongwen Jing Bo Meng Jiangyu Wu State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Key Laboratory of Xinjiang Coal Resources Green Mining Ministry of EducationXinjiang Institute of EngineeringUrumqi 830023China

The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious ***,the true triaxial compression tests,CT scanning,SEM,and EDS tests were conducted on cemented gangue backfill samples(CGBSs)with various carbon nanotube concentrations(P_(CNT))that satisfied fractal theory for the PSD of *** mechanical properties,energy dissipations,and failure mechanisms of the CGBSs under true triaxial compression were systematically *** results indicate that appropriate carbon nanotubes(CNTs)effectively enhance the mechanical properties and energy dissipations of CGBSs through micropore filling and microcrack bridging,and the optimal effect appears at P_(CNT)of 0.08wt%.Taking PSD fractal dimension(D)of 2.500 as an example,compared to that of CGBS without CNT,the peak strength(σ_(p)),axial peak strain(ε_(1,p)),elastic strain energy(Ue),and dissipated energy(U_(d))increased by 12.76%,29.60%,19.05%,and90.39%,***,excessive CNTs can reduce the mechanical properties of CGBSs due to CNT agglomeration,manifesting a decrease inρ_(p),ε_(1,p),and the volumetric strain increment(Δε_(v))when P_(CNT)increases from 0.08wt%to 0.12wt%.Moreover,the addition of CNTs improved the integrity of CGBS after macroscopic failure,and crack extension in CGBSs appeared in two modes:detour and pass through the ***σ_(p)and U_(d)firstly increase and then decrease with increasing D,and porosity shows the opposite ***ε_(1,p)andΔε_(v)are negatively correlated with D,and CGBS with D=2.150 has the maximum deformation parameters(ε_(1,p)=0.05079,Δε_(v)=0.01990)due to the frictional slip effect caused by coarse *** increasing D,the failure modes of CGBSs are sequentially manifested as oblique shear failure,"Y-shaped"shear failure,and conjugate shear failure.

关键词： cemented gangue backfill materials particle size distribution true triaxial compression test carbon nanotubes mechanical properties failure modes

Estimation of ultra-stability of methane hydrate at 1 atm by thermal conductivity measurement

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2010年第3期19卷 229-233页

作者： Dongliang Li Deqing liang Shuanshi fan Hao Peng Guangzhou Institute of Energy Conversion CAS Guangzhou 510640 Guangdong China Key Laboratory of Renewable Energy and Gas Hydrate CAS Guangzhou 510640 Guangdong China Key Laboratory of Enhanced Heat Transfer and Energy Conservation MOE Guangzhou 510640 Guangdong China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

Thermal conductivity of methane hydrate was measured in hydrate dissociation self-preservation zone by means of the transient plane source（TPS） technique developed by *** sample was formed from 99.9%（volume ratio） methane gas with 280 ppm sodium dodecyl sulfate（SDS） solution under 6.6 MPa and 273.15 *** methane hydrate sample was taken out of the cell and moved into a low temperature chamber when the conversion ratio of water was more than 90%.In order to measure the thermal conductivity,the sample was compacted into two columnar parts by compact tool at 268.15 *** measurements are carried out in the temperature ranging from 263.15 K to 271.15 K at atmospheric ***,the relationship between thermal conductivity and time is also investigated at 263.15 K and 268.15 K,*** 24 h,thermal conductivity increases only 5.45% at 268.15 K,but thermal conductivity increases 196.29% at 263.15 *** hydrates exhibit only minimal decomposition at 1 atm and the temperature ranging from 263.15 K to 271.15 *** 1 atm and 268.15 K,the total gas that evolved after 24 h was amounted to less than 0.71% of the originally stored gas,and this ultra-stability was maintained if the test was lasted for more than two hundreds hours before terminating.

关键词： methane hydrate self-preservation dissociation velocity thermal conductivity

Electrocatalysis of Oxygen Evolution Reaction on Ti/SnO_2+RuO_2+MnO_2/MnO_2 Electrode in Sulfuric Acid Solution

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2001年第3期17卷 287-292页

作者： liang Zhen-hai fan Cai-mei SUN Yan-ping Laboratory of Electrochemical Engineering Research College of Chemical EngineeringTaiyuan University of TechnologyTaiyuan 030024P.R.China

The Ti-Supported MnO_2 electrode was modified by introducing SnO_2+RuO_2+MnO_2 as an intermediate layer into the Ti/MnO_2 interface. The anodic polarization curves were measured at various temperatures ranging from 30 to 80℃ and the activation energy for the oxygen evolution reaction was evaluated. The experimental activation energy increased linearly with increasing the overpotential. The activation energy at the equilibrium potential was linearly correlated with the difference between the crystal field stabilization energies of Mn^(4+) at initial state and Mn^(4+) at transition state. The electrocatalysis characteristics of the anode were discussed by means of the mechanism of the substitution reaction of the ligand(S_N1 and S_N2) and molecular orbital theory. The results show that the anode has better electrocatalystic characteristics.

关键词： Ti/SnO2+RuO2+MnO2/MnO2 anode Electroeatalysis Activation energy Crystal field theory Molecular Orbital theory

Precipitation and Solid Solution of Titanium Carbonitride Inclusions in Hypereutectoid Tire Cord Steel

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2016年第4期23卷 338-343页

作者： Chen-fan YU Zheng-liang XUE Wu-tao JIN The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology

The properties of titanium carbonitride Ti（CxN1-x） inclusions precipitated during solidification of tire cord steels and the thermodynamic conditions for their decomposition and solid solution during billet heating were investigated using a thermodynamics method. The solid solution of Ti（CxN1-x） inclusions during high-temperature heating was also studied experimentally. The results revealed that：（1） the higher the content of carbon in the tire cord steel is, the greater the value of .r in the Ti（CxN1-x） inclusions is; （2） the higher the content of carbon in the tire cord steel is, the earlier the Ti（CxN1-x） inclusions precipitated during the solidification process and the lower the solidification front temperature is during precipitation; （3） when an 82A steel sample was heated to 1087℃, the Ti（CxN1-x） inclusions possess the thermodynamic conditions of decomposition and solid solution; and （4） when 82A samples were heated to 1150 and 1 250℃, the total number of Ti（CxN1-x） inclusions larger than 5μm in diameter decreased by 55.0% and 70.3%, respectively. In addition, although smaller inclusions with diameter less than 2 μm continued to decompose when the sample was heated at 1 250℃ for 2 h and then cooled to 1000℃ in the furnace, the number of inclusions larger than 5 μm in diameter increased.

关键词： hypereutectoid tire cord steel titanium carbonitride inclusion precipitation solidification solid solution billet heating

An Innovative Approach for the Short-term Traffic Flow Prediction

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2021年第5期30卷 519-532页

作者： Xing Su Minghui fan Minjie Zhang Yi liang Limin Guo Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Faculty of Engineering and Information Sciences University of WollongongNSW 2500Australia

Traffic flow prediction plays an important role in intelligent transportation applications,such as traffic control,navigation,path planning,etc.,which are closely related to people's daily *** the last twenty years,many traffic flow prediction approaches have been ***,some of these approaches use the regression based mechanisms,which cannot achieve accurate short-term traffic flow ***,other approaches use the neural network based mechanisms,which cannot work well with limited amount of training *** this end,a light weight tensor-based traffic flow prediction approach is proposed,which can achieve efficient and accurate short-term traffic flow prediction with continuous traffic flow data in a limited period of *** the proposed approach,first,a tensor-based traffic flow model is proposed to establish the multi-dimensional relationships for traffic flow values in continuous time ***,a CANDECOMP/PARAFAC decomposition based algorithm is employed to complete the missing values in the constructed ***,the completed tensor can be directly used to achieve efficient and accurate traffic flow *** experiments on the real dataset indicate that the proposed approach outperforms many current approaches on traffic flow prediction with limited amount of traffic flow data.

关键词： Short-term traffic flow prediction tensor CP decomposition limited amount of data