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| 1 | Exchange-coupling interaction and effective anisotropy in nanocomposite permanent materials显示文摘Taking Nd2Fe14B/α-Fe as example, the exchange-coupling interactions between magnetically soft and hard grains in nanocomposite permanent materials and their effects on the effective anisotropy of materials were investigated. The calculation results expressed that the exchange-coupling interactions are enhanced with the reduction of grain size, and the effective anisotropy of materials decreases with the reduction of gram size and the increase of magnetically soft phase component. The remanence and the effective anisotropy of materials possess the opposite variation trend with the change of grain size and phase ratio. The mean grain size should be in the range of 10-15 nm and the ratio of soft phase should be less than 50% for getting the magnet with high energy product. | Ruwei Gao Weicun Feng Wei Chen Biao Wang Guangbing Han Peng Zhang | 2002 | Chinese Science Bulletin2002，47，14： | 5 |
| 2 | Graphitizing N-doped mesoporous carbon nanospheres via facile single atom iron growth for highly efficient oxygen reduction reaction显示文摘Single atom catalyst is of great importance for the oxygen reduction reaction(ORR).However,facile preparation of single atom catalyst without using well-designed precursors or labor-intensive acid leaching remains an urgent challenge.Herein,a simple pyrolysis of Fe3+-loaded mesoporous phenolic resin(mPF)-melamine precursor is used to prepare the single atom iron-anchored N-doped mesoporous graphitic carbon nanospheres(Fe/N-MGN).Investigation of the synthesis reveals the appropriate Fe-assisted catalysis effect and mPF template effect,which not only spurs the highly graphitic porous framework of Fe/N-MGN with plentiful pyridinic N/graphitic N,but also assures the dispersed single atom Fe anchoring without elaborated procedures.As a result,the as-synthesized Fe/N-MGN demonstrates high catalytic activity,good durability and excellent methanol tolerance for ORR.This work promises a facile method to regulate the graphitic carbon growth and single atom Fe loading for the highly efficient electrocatalysis. | Yunshi Xu Liping Zhu Xuexue Cui Mingyu Zhao Yaling Li Leilei Chen Weicun Jiang Ting Jiang Shuguang Yang Yi Wang | 2020 | Nano Research2020，13，3： | 5 |
| 3 | Materials for evaporation-driven hydrovoltaic technology显示文摘Water constitutes the largest energy carrier on earth,absorbing more than 70%of the solar energy received by the earth's surface,yet its low exploitation has been a constant concern.The hydrovoltaic effect is an emerging technology that generates electricity through the direct interaction between nanomaterials and water of various forms(raindrops,waves,flows,moisture,and natural evaporation).Especially,the evaporation-driven hydrovoltaic effect is a spontaneous and ubiquitous process that can directly convert thermal energy from the surrounding environment into electricity without the demand for additional mechanical work,which shows unique advantages compared with other hydrovoltaic effects.A variety of nanostructured materials have been steadily developed for evaporation-driven hydrovoltaic devices(EHDs)in recent years.However,there has been a lack of a clear specification on the selection and design of materials for improving device performance.Herein,we first analyze the mechanisms of EHDs followed by a summarization of the recent advances in materials,including carbon materials,biomass-based materials,metal oxides,composite materials,and others.We then discuss the strategies for improving the energy conversion efficiency and the output power in terms of structural design,surface modification,and interface treatment.Finally,we provide an outlook on the potential applications of electricity generation,sensors,and desalination technology,as well as the challenges and prospects for the development of this emerging technology in the future. | Chunxiao Zheng Weicun Chu Sunmiao Fang Jin Tan Xiaofan Wang Wanlin Guo | 2022 | Interdisciplinary Materials2022，1，4： | 3 |
| 4 | Structure and Magnetic Properties of EuMnxGa3-x 显示文摘 | Guo Yongquan Feng Weicun Li Wei | 2007 | Journal of Applied Physics2007，101，2： | 1 |
| 5 | Integrating reduced graphene oxides and PPy nanoparticles for enhanced electricity from water evaporation显示文摘Developing high-performance nanostructured materials is key to deliver the potential of hydrovoltaic technology into practical applications.As single-component materials have approached its limit in generating hydrovoltaic electricity,the development of multi-component hydrovoltaic materials has been necessary in continuously boosting the electricity output.Here,we report a hydrovoltaic material by integrating reduced graphene oxides and polypyrrole nanoparticles(rGO/PPy),where the rGO contributes improved conductivity and large specific surface area while PPy nanoparticles enable enhanced interaction with water.The device fabricated with this material generates a short-circuit current of 6μA as well as a maximum power density of over 1μW/cm3 from natural evaporation of water.And the substantial ion-PPy interaction enables robust voltage generation from evaporation of various salt solutions.Moreover,an outstanding scaling ability is demonstrated by connecting 10 devices in series that generate a sustainable voltage of up to~2.5 V,sufficing to power many commercial devices,e.g.LED bulb and LCD screen. | Bingkun Tian Xiaofeng Jiang Weicun Chu Chunxiao Zheng Wanlin Guo Zhuhua Zhang | 2023 | International Journal of Smart and Nano Materials2023，14，2： | 1 |
| 6 | Online learned player recognition model based soccer player tracking and labeling for long- shot scenes 显示文摘 | Xu Weicun Zhae Qingjie Wang Yuxia et el | 2014 | IEICE Tmns on Information and Systems2014，97，1： | 1 |
| 7 | Research on the Recognition Method of Electric Energy Meter Lead Title based on the Fuzzy Image Processing显示文摘 | WeiCun FAN Yujie LI | 2015 | International Journal of Technology Management2015，，6： | 1 |
| 8 | Effective anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent magnetic materials 显示文摘 | Han Guangbing Gao Ruwei Feng Weicun | 2003 | Science in China (G)2003，46，4： | 1 |
| 9 | 显示文摘 | Gao Ruwei Feng Weicun Chen Wei | 2002 | Chinese Science Bulletin2002，47，14： | 1 |
| 10 | Effective anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent magnetic material显示文摘 | Guangbing Han Ruwei Gao Weicun Feng Hanqiang Liu Biao Wang Peng Zhang Wei Chen Wei Li Yongquan Guo | 2003 | Science in China Series G: Physics Mechanics and Astronomy2003，，4： | 1 |
| 11 | Effective anisotropy and coercivity in nanocrystalline single-phase NdFeB permanent magnetic material显示文摘 | Guangbing Han Ruwei Gao Weicun Feng Hanqiang Liu Biao Wang Peng Zhang Wei Chen Wei Li Yongquan Guo | 2003 | Science in China Series G: Physics Mechanics and Astronomy2003，，4： | 1 |
| 12 | 显示文摘 | Gao Ruwei Feng Weicun Chen Wei | 2002 | Chinese Science Bulletin2002，47，14： | 1 |
| 13 | Exchange-coupling interaction, effective anisotropy and magnetic property of nano-magnetic materials显示文摘在在 nanocrystalline 的谷物之间的联合交换的相互作用的理论和模型磁性的材料这里被介绍。他们的不足和区别 frcrn 试验性的结果被削尖 out' 和一些修订被做。阶段部件 ratio' 的效果在 nanocomposite peimanent 材料和改进模型的有效 anistropy 和磁性上的谷物尺寸和 microstnjcture 详细被讨论。 | SUN Yan GAO Ruwei HAN Baiping LIU Min HAN Guangbing FENG Weicun | 2007 | Progress in Natural Science:Materials International2007，17，2： | 0 |
| 14 | Influence of fracture width on borehole radar response显示文摘Fracture is a common underground structure phenomenon,which can provide space and passage for the storage and migration of oil and gas.Borehole radar is a fast and high-resolution geophysical detection method,which has been widely used in engineering,exploration and other fields.This paper mainly uses theoretical analysis and numerical simulation to study the variation law of the characteristics of the received borehole radar signal with the variation of fracture width.The Ricker wavelet is used as the pulse signal of the borehole radar.The results show that the amplitude of the signal received by the borehole radar first increases,then decreases,and finally tends to be a stable value with the increase of fracture width.The results have guiding significance for the detection of underground fractures and the estimation of fracture width by borehole radar. | YAN Weicun LIU Sixin CHANG Xinghao RAN Limin ZHAO Yonggang LI Jianwei | 2021 | Global Geology2021，24，2： | 0 |
| 15 | Mechanism of water-evaporation-induced electricity beyond streaming potential显示文摘Since its first discovery in 2017,evaporation-induced electricity has attracted extensive attention and shown significant advantages in green energy conversion.While the streaming potential-related electrokinetic effect has been intensively explored and widely recognized as the underlying mechanism,the role of coupling between water molecules and charge carriers in the material remains elusive.Here we show through carefully designed experiments that the streaming potential effect indeed plays a role but can only contribute about half to the total water-evaporation-induced voltage occurring within the partially-wetted region of the carbon black film where the solid-liquid-gas three-phase interface exists.It is also shown that water evaporation from carboxyl and amino-functionalized carbon black films produces opposite voltage signals.Detailed first-principles calculations unveil that the adsorption of water molecules can lead to reversed charge transfer in the carboxyl and amino-functionalized carbon substrates.Finally,an evaporation-driven charge transport mechanism is proposed for the induced electricity mediated by the coupling between water molecules and charge carriers in the material.The results reveal the important role of direct interaction between water molecules and materials,deepening our understanding of the mechanism for evaporation-induced hydrovoltaic effect beyond streaming potential. | Sunmiao Fang Huan Lu Weicun Chu Wanlin Guo | 2024 | Nano Research Energy2024，3，2： | 0 |
| 16 | Erratum to:Efficient and stable perovskite solar cells by build-inπ-columns and ionic interfaces in covalent organic frameworks显示文摘Erratum to Nano Research,2023,16(7):9387-9397 htps:/oi.or/0.100/1274-023-5603-040(1)One sentence in the article was unfortunately mispresented on page 9392.Instead of As shown in Fig.S19 in the ESM,the A2/A2 values of the reference,N-COF,and C-COF samples were 45.52%,44.55%,and 45.05%,respectively. | Riming Nie Xiaokai Chen Zhongping Li Weicun Chu Si Ma Changqing Li Xiaoming Liu Yonghua Chen Zhuhua Zhang Wanlin Guo | 2024 | Nano Research2024，17，5： | 0 |
| 17 | Role of electrodes in study of hydrovoltaic effects显示文摘The last decade has witnessed the emergence of hydrovoltaic technology,which can harvest electricity from different forms of water movement,such as raindrops,waves,flows,moisture,and natural evaporation.In particular,the evaporation-induced hydrovoltaic effect received great attention since its discovery in 2017 due to its negative heat emission property.Nevertheless,the influence of electrode reactions in evaporation-induced power generation is not negligible due to the chemical reaction between active metal electrodes and water,which leads to“exceptional”power generation.Herein,we designed a series of experiments based on air-laid paper devices with electrodes of different activities as the top and bottom electrodes.To verify the contribution of electrodes,we compared the output performance of different electrode combinations when the device was partially-wetted and fully-wetted.The device hydrophilicity,salt concentration,and acidity or basicity of solutions were also comprehensively investigated.It is demonstrated that the chemical reaction of active metals(Zn,Cu,Ag,etc.)with different aqueous solutions can generate considerable electrical energy and significantly distort the device performance,especially for Zn electrodes with an output voltage from~1.26 to~1.52 V and current from~1.24 to~75.69μA.To promote the long-term development of hydrovoltaic technology,we recommend use of inert electrodes in hydrovoltaic studies,such as Au and Pt,especially in water and moisture environment. | Chunxiao Zheng Sunmiao Fang Weicun Chu Jin Tan Bingkun Tian Xiaofeng Jiang Wanlin Guo | 2023 | Nano Research2023，16，8： | 0 |
| 18 | Efficient and stable perovskite solar cells by build-inπ-columns and ionic interfaces in covalent organic frameworks显示文摘Perovskite solar cells(PSCs)have attracted much attention due to their rapidly increased power conversion efficiencies,however,their inherent poor long-term stability hinders their commercialization.The degradation of PSCs first comes from the degradation of hole transport materials(HTMs).Here,we report the construction of periodicπ-columnar arrays and ionic interfaces over the skeletons by introducing cationic covalent organic frameworks(C-COFs)to the HTM.Periodicπ-columnar arrays can optimize the charge transport ability and energy levels of the hole transport layer and suppress the degradation of HTM,and ionic interfaces over the skeletons can produce stronger electric dipole and electrostatic interactions,as well as higher charge densities.The C-COFs were designed and synthesized via Schiff base reaction by using 1,3,5-triformylphloroglucinol as a neutral knot and dimidium bromide as cationic linker.The neutral COFs(N-COFs)were also synthesized as a reference by using 3,8-diamino-6-phenylphenanthridine as neutral linker.PSCs with cationic COF exhibit the highest efficiency of 23.4%with excellent humidity and thermal stability.To the best of our knowledge,this is the highest efficiency among the meso-structured PSCs fabricated by a sequential process. | Riming Nie Xiaokai Chen Zhongping Li Weicun Chu Si Ma Changqing Li Xiaoming Liu Yonghua Chen Zhuhua Zhang Wanlin Guo | 2023 | Nano Research2023，16，7： | 0 |
| 19 | Model maturity towards modeling and simulation:Concepts,index system framework and evaluation method显示文摘Simulation has become an essential way and sometimes the only way to study complex systems(e.g.,system of systems,SoS).Simulation is the model-based activity.How to build a high-quality model is the first consideration in simulation.Fidelity and credibility are the two mostly used metrics to evaluate the quality of a model.However,the definitions and evaluation methods of fidelity and credibility vary from one research to another and it’s hard to evaluate the metrics precisely.More importantly,the evolution process of a model in use cannot be directly reflected by the two metrics.Therefore,this paper introduces the model maturity to track the status of a model during its life cycle,especially in the use and management phases,which will be an important supplement to the quality evaluation system of models.The concept of model maturity is given and a framework of index system for model maturity evaluation is established.Then,a hierarchical evaluation method based on qualitative and quantitative analysis(HEQQ)for model maturity is proposed.Finally,a case study is used to validate the feasibility and effectiveness of the proposed method. | Lin Zhang Ying Liu Yuanjun Laili Weicun Zhang | 2020 | International Journal of Modeling, Simulation, and Scientific Computing2020，11，3： | 0 |
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