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55篇 您的检索式:作者名="Yiqun Wu"
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1Prototype for 5G New Air Interface Technology SCMA and Performance Evaluation显示文摘Sparse code multiple access(SCMA) is a novel non-orthogonal multiple access scheme proposed to meet the challenging demand of the future 5G communications, especially in support of the massive connections. The coded bits from each data stream will be directly mapped as multi-dimensional SCMA codeword in complex domain and then spread onto the physical resource elements in a sparse manner. The number of codewords that can be nonorthogonally multiplexed in one SCMA block can be made much larger than the number of orthogonal resource elements therein, resulting in an overloaded system. The sparsity in the spreading pattern and the design in the multidimensional modulator jointly ensure the SCMA codewords can be robustly decoded with low complexity. In this paper, we focus on the low complexity receiver design and verified the superior of an SCMA system via simulations and real-time prototyping. Lab tests and field tests all show that SCMA is a promising candidate for 5G non-orthogonal multiple access which can provide up to 300% overloading that triples the whole system throughput while still enjoying the link performance close to orthogonal transmissions.LU Lei CHEN Yan GUO Wenting YANG Huilian WU Yiqun XING Shuangshuang 2015China Communications2015,12,S1:15
2Resorbable polymer electrospun nanofibers:History,shapes and application for tissue engineering显示文摘Resorbable polymer electrospun nanofiber-based materials/devices have high surface-to-volume ratio and often have a porous structure with excellent pore interconnectivity,which are suitable for growth and development of different types of cells.Due to the huge advantages of both resorbable polymers and electrospun nano fibers,re sorbable polymer electrospun nanofibers(RPENs)have been widely applied in the field of tissue engineering.In this paper,we will mainly introduce RPENs for tissue engineering.Firstly,the electrospinning technique and electrospun nanofiber architectures are briefly introduced.Secondly,the application of RPENs in the field of tissue engineering is mainly reviewed.Finally,the advantages and disadvantages of RPENs for tissue engineering are discussed.This review will provide a comprehensive guide to apply resorbable polymer electrospun nanofibers for tissue engineering.Tingting Wu Mengzhen Ding Cuiping Shi Yiqun Qiao Panpan Wang Ruirui Qiao Xichang Wang Jian Zhong 2020Chinese Chemical Letters2020,31,3:8
3Advanced Ni-Nx-C single-site catalysts for CO2 electroreduction to CO based on hierarchical carbon nanocages and S-doping显示文摘Metal-nitrogen-carbon materials are promising catalysts for CO2 electroreduction to CO. Herein, by taking the unique hierarchical carbon nanocages as the support, an advanced nickel-nitrogen-carbon single-site catalyst is conveniently prepared by pyrolyzing the mixture of NiCl2 and phenanthroline, which exhibits a Faradaic efficiency plateau of > 87% in a wide potential window of −0.6 – −1.0 V. Further S-doping by adding KSCN into the precursor much enhances the CO specific current density by 68%, up to 37.5 A·g−1 at −0.8 V, along with an improved CO Faradaic efficiency plateau of > 90%. Such an enhancement can be ascribed to the facilitated CO pathway and suppressed hydrogen evolution from thermodynamic viewpoint as well as the increased electroactive surface area and improved charge transfer fromkinetic viewpoint due to the S-doping. This study demonstrates a simple and effective approach to advanced electrocatalysts by synergetic modification of the porous carbon-based support and electronic structure of the active sites.Yiqun Chen Yuejian Yao Yujian Xia Kun Mao Gongao Tang Qiang Wu Lijun Yang Xizhang Wang Xuhui Sun Zheng Hu 2020Nano Research2020,13,10:8
4Regulation of Cytokinesis by Exocyst Subunit SEC6 and KEULE in Arabidopsis thaliana显示文摘合适的泡在房间板拴住和膜熔化为胞质分裂是必要的。两个都,拴住 complexexocyst 和膜熔化管理者 KEULE 的泡被显示在房间板形成,而是准确机制 stillremain 工作被探索。在这研究,使用酵母二混血儿(Y-2-H ) 试金,我们发现那 SEC6 与 KEULE 交往了, andthat KEULE 的 C 终端区域的小部分为相互作用被要求。由在 vitro 下拉试金使用的进一步的研究的直接 SEC6KEULE 相互作用 wassupported, immunoprecipitation,并且在 vivo 双分子的开花互补(BIFC ) 显微镜学。sec6 异种是作为致命的男 gametophytic 报导;然而,救花粉的 sec6 异种(PRsec6 ) 在叶人行道房间和警卫房间在胚胎的房间并且以后显示了胞质分裂缺点。SEC6 andKEULE 蛋白质在在转基因的 Arabidopsis 的胞质分裂期间对房间板 co 局部性。而且,仅仅 SEC6 然而并非位于房间板的另外的 exocyst 子单元在 vitro 与 KEULE 交往了。这些结果证明 SEC6 象 KEULE 一样,在胞质分裂,和 SEC6KEULE interactionmay 起一个生理的作用用作在到达的泡和膜熔化机械之间的一个新奇分子的连接或直接在 plants.Key 词在房间板形成期间调整 membranefusion:Jiandong Wu Xiaoyun Tan ChengyunWu Kun Cao Yiqun Bao 2013Molecular Plant2013,6,6:6
5WUSCHEL-related homeobox1(WOX1)regulates vein patterning and leaf size in Cucumis sativus显示文摘In plants,WUSCHEL-related homeobox1(WOX1)homologs promote lamina mediolateral outgrowth.However,the downstream components linking WOX1 and lamina development remain unclear.In this study,we revealed the roles of WOX1 in palmate leaf expansion in cucumber(Cucumis sativus).A cucumber mango fruit(mf)mutant,resulting from truncation of a WOX1-type protein(CsWOX1),displayed abnormal lamina growth and defects in the development of secondary and smaller veins.CsWOX1 was expressed in the middle mesophyll and leaf margins and rescued defects of the Arabidopsis wox1 prs double mutant.Transcriptomic analysis revealed that genes involved in auxin polar transport and auxin response were highly associated with leaf development.Analysis of the cucumber mf rl(round leaf)double mutant revealed that CsWOX1 functioned in vein development via PINOID(CsPID1)-controlled auxin transport.Overexpression of CsWOX1 in cucumber(CsWOX1-OE)affected vein patterning and produced‘butterfly-shaped’leaves.CsWOX1 physically interacted with CsTCP4a,which may account for the abnormal lamina development in the mf mutant line and the smaller leaves in the CsWOX1-OE plants.Our findings demonstrated that CsWOX1 regulates cucumber leaf vein development by modulating auxin polar transport;moreover,CsWOX1 regulates leaf size by controlling CIN-TCP genes.Hu Wang Huanhuan Niu Chuang Li Guoyan Shen Xiaofeng Liu Yiqun Weng Tao Wu Zheng Li 2020Horticulture Research2020,7,1:6
6Analyses of oligodontia phenotypes and genetic etiologies显示文摘Oligodontia is the congenital absence of six or more teeth and comprises the more severe forms of tooth agenesis.Many genes have been implicated in the etiology of tooth agenesis,which is highly variable in its clinical presentation.The purpose of this study was to identify associations between genetic mutations and clinical features of oligodontia patients.An online systematic search of papers published from January 1992 to June 2021 identified 381 oligodontia cases meeting the eligibility criteria of causative gene mutation,phenotype description,and radiographic records.Additionally,ten families with oligodontia were recruited and their genetic etiologies were determined by whole-exome sequence analyses.We identified a novel mutation in WNT10A(c.99_105dup)and eight previously reported mutations in WNT10A(c.433 G>A;c.682 T>A;c.318 C>G;c.511.C>T;c.321 C>A),EDAR(c.581 C>T),and LRP6(c.1003 C>T,c.2747 G>T).Collectively,20 different causative genes were implicated among those 393 cases with oligodontia.For each causative gene,the mean number of missing teeth per case and the frequency of teeth missing at each position were calculated.Genotype–phenotype correlation analysis indicated that molars agenesis is more likely linked to PAX9 mutations,mandibular first premolar agenesis is least associated with PAX9 mutations.Mengqi Zhou Hong Zhang Heather Camhi Figen Seymen Mine Koruyucu Yelda Kasimoglu Jung-Wook Kim Hera Kim-Berman Ninna M.R.Yuson Paul J.Benke Yiqun Wu Feng Wang Yaqin Zhu James P.Simmer Jan C-C.Hu 2021International Journal of Oral Science2021,13,3:5
7Effect of warm acupuncture on nitric oxide synthase and calcitonin gene-related peptide in a rat model of lumbar nerve root compression显示文摘BACKGROUND:Varying degrees of inflammatory responses occur during lumbar nerve root compression.Studies have shown that nitric oxide synthase(NOS) and calcitonin gene-related peptide(CGRP) are involved in secondary disc inflammation. OBJECTIVE:To observe the effects of warm acupuncture on the ultrastructure of inflammatory mediators in a rat model of lumbar nerve root compression,including NOS and CGRP contents. DESIGN,TIME AND SETTING:Randomized,controlled study,with molecular biological analysis, was performed at the Experimental Center,Sixth People's Hospital Affiliated to Shanghai Jiao Tong University,between September 2006 and April 2007. MATERIALS:Acupuncture needles and refined Moxa grains were purchased from Shanghai Taicheng Technology Development Co.,Ltd.,China;Mobic tablets were purchased from Shanghai Boehringer Ingelheim Pharmaceuticals Co.,Ltd.,China;enzyme linked immunosorbent assay (ELISA) kits for NOS and CGRP were purchased from ADL Biotechnology,Inc.,USA. METHODS:A total of 50,healthy,adult Sprague-Dawley rats,were randomly divided into five groups normal,model,warm acupuncture,acupuncture,and drug,with 10 rats in each group.Rats in the four groups,excluding the normal group,were used to establish models of lumbar nerve root compression.After 3 days,Jiaji points were set using reinforcing-reducing manipulation in the warm acupuncture group.Moxa grains were burned on each needle,with 2 grains each daily.The acupuncture group was the same as the warm acupuncture group,with the exception of non-moxibustion.Mobic suspension(3.75 mg/kg) was used in the oral drug group,once a day. Treatment of each group lasted for 14 consecutive days.Modeling and medication were not performed in the normal group. MAIN OUTCOME MEASURES:The ultrastructure of damaged nerve roots was observed with transmission electron microscopy;NOS and CGRP contents were measured using ELISA. RESULTS:The changes of the radicular ultramicrostructure were characterized by Wallerian degeneration;nerve fibers were clearly demyelinated;axons collapsed or degenerated;outer Schwann cell cytoplasm was swollen and its nucleus was compacted.Compared with the normal group,NOS and CGRP contents in the nerve root compression zone in the model group were significantly increased(P<0.01).Nerve root edema was improved in the drug,acupuncture and the warm acupuncture groups over the model group.NOS and CGRP expressions were also decreased with the warm acupuncture group having the lowest concentration(P<0.01). CONCLUSION:In comparison to the known effects of Mobic drug and acupuncture treatments,the warm acupuncture significantly decreased NOS and CGRP expression which helped improve the ultrastructure of the comoressed nerve root.Yaochi Wu Yiqun Mi Peng Zhang Junfeng Zhang Wei Chen 2009Neural Regeneration Research2009,4,6:5
8Sensitivity of simulated short-range high-temperature weather to land surface schemes by WRF显示文摘The simulations of a heat wave occurring in southern Yangtze-Huaihe valley and southern China during late July,2003 were conducted to examine the sensitivity of simulated surface air temperature(SAT) to different land surface schemes(LSSs) using the Weather Research and Forecasting Model(WRF) Version 2.2 in the short-range mode for 24-h integrations.Initial and boundary conditions employed a National Centers for Environmental Prediction(NCEP) analysis.The results showed that,overall,simulated high-temperature weather is sensitive to different LSSs.Large differences in simulated SAT intensity,threat score,and simulated error under different schemes are identified clearly.In addition,some systematic differences are also in-duced by the LSSs.In terms of threat score from the three LSSs,SLAB is the best,and RUC is better than NOAH.SLAB gives the lowest absolute error for area-averaged SAT,and tends to depict the western Pacific subtropical high with the east-ernmost position at low levels.The LSSs modify the simulated SAT,primarily via the transfer of sensible heat from the land surface to the atmosphere.The physical mechanism of the positive feedback between atmospheric circulation and the SAT is unimportant,with'negative'feedback over most of the simulated areas.This study emphasizes the importance of improving LSSs in SAT forecasting by numerical models.ZENG XinMin WU ZhiHuang XIONG ShiYan SONG Shuai ZHENG YiQun LIU HuaQiang 2011Science China Earth Sciences2011,54,4:5
9DeST 3.0:A new-generation building performance simulation platform显示文摘Buildings contribute to almost 30%of total energy consumption worldwide.Developing building energy modeling programs is of great significance for lifecycle building performance assessment and optimization.Advances in novel building technologies,the requirements of high-performance computation,and the demands for multi-objective models have brought new challenges for building energy modeling software and platforms.To meet the increasing simulation demands,DeST 3.0,a new-generation building performance simulation platform,was developed and released.The structure of DeST 3.0 incorporates four simulation engines,including building analysis and simulation(BAS)engine,HVAC system engine,combined plant simulation(CPS)engine,and energy system(ES)engine,connected by air loop and water loop balancing iterations.DeST 3.0 offers numerous new simulation features,such as advanced simulation modules for building envelopes,occupant behavior and energy systems,cross-platform and compatible simulation kernel,FMI/FMU-based co-simulation functionalities,and high-performance parallel simulation architecture.DeST 3.0 has been thoroughly evaluated and validated using code verification,inter-program comparison,and case-study calibration.DeST 3.0 has been applied in various aspects throughout the building lifecycle,supporting building design,operation,retrofit analysis,code appliance,technology adaptability evaluation as well as research and education.The new generation building simulation platform DeST 3.0 provides an efficient tool and comprehensive simulation platform for lifecycle building performance analysis and optimization.Da Yan Xin Zhou Jingjing An Xuyuan Kang Fan Bu Youming Chen Yiqun Pan Yan Gao Qunli Zhang Hui Zhou Kuining Qiu Jing Liu Yan Liu Honglian Li Lei Zhang Hong Dong Lixin Sun Song Pan Xiang Zhou Zhe Tian Wenjie Zhang Ruhong Wu Hongsan Sun Yu Huang Xiaohong Su Yongwei Zhang Rui Shen Diankun Chen Guangyuan Wei Yixing Chen Jinqing Peng 2022Building Simulation2022,15,11:5
10Microstructure Control of Nanoporous Silica Thin Film Prepared by Sol-gel Process显示文摘Nanoporous 硅石电影被大音阶的第五音胶化过程与底准备,酸 andbase/acid 二拍子的圆舞催化作用。传播电子显微镜(TEM ) 和粒子尺寸分析器被用来描绘微观结构和粒子尺寸 sols.Scanningelectron 显微镜学(SEM ) 的分发,原子力量显微镜学(AFM ) 和分光镜的 ellipsometer 被用来描绘表面微观结构和硅石电影的光性质。大音阶的第五音的稳定性在长期的存储期间被调查。而且,硅石电影的光常数的分散关系,和微观结构的控制和由在大音阶的第五音胶化期间改变催化作用条件的电影的性质处理也被讨论。Yiqun XIAO Jun SHEN Zhiyong XIE Bin ZHOU Guangming WU 2007Journal of Materials Science & Technology2007,23,4:4
11Arabidopsis EXO70A1 recruits Patellin3 to the cell membrane independent of its role as an exocyst subunit显示文摘The exocyst is a well-known complex which tethers vesicles at the cell membrane before fusion. Whether an individual subunit can execute a unique function is largely unknown. Using yeast-two-hybrid(Y2H) analysis, we found that EXO70A1 interacted with the GOLD domain of Patellin3(PATL3). The direct EXO70A1-PATL3 interaction was supported by in vitro and in vivo experiments. In Arabidopsis, PATL3-GFP colocalized with EXO70A1 predominantly at the cell membrane, and PATL3 localization was insensitive to BFA and Try A23. Remarkably, in the exo70 a1 mutant, PATL3 proteins accumulated as punctate structures within the cytosol, which did not colocalize with several endomembrane compartment markers, and was insensitive to BFA. Furthermore, PATL3 localization was not changed in the exo70 e2, PRsec6 or exo84b mutants. These data suggested that EXO70A1, but not other exocyst subunits, was responsible for PATL3 localization,which is independent of its role in secretory/recycling vesicletethering/fusion. Both EXO70A1 and PATL3 were shown to bind PI4 P and PI(4,5)P2 in vitro. Evidence was obtained that the other four members of the PATL family bound to EXO70A1 as well, and shared a similar localization pattern as PATL3.These findings offered new insights into exocyst subunitspecific function, and provided data and tools for further characterization of PATL family proteins.Chengyun Wu Lu Tan Max van Hooren Xiaoyun Tan Feng Liu Yan Li Yanxue Zhao Bingxuan Li Qingchen Rui Teun Munnik Yiqun Bao 2017Journal of Integrative Plant Biology2017,59,12:3
12Impact of coal power generation on the characteristics and risk of heavy metal pollution in nearby soil显示文摘Introduction:The development of coal power base(CPB)poses a severe challenge to the soil.We conducted a soil survey in Xilinhot CPB,to evaluate and analyze the pollution characteristics,potential ecological risk,and sources of six heavy metals(As,Pb,Cu,Zn,Mn,and Cd)in soil by using Geo-accumulation index,revised Nemerow integrated pollution index(RNIPI),and potential ecological risk index(RI).Outcomes/other:The results showed that the pollution of Cd and As were dramatic.The mean of Cd and As were 1.11 mg·kg^(-1) and 25.13 mg·kg^(-1),which were 42.55 times and 4.41 times higher than its local background value.The Geo-accumulation indices showed the contamination degree of Cd was strong and As was moderate,and the status of Cu,Pb,Zn,and Mn were uncontaminated.Xilinhot was strongly contaminated based on its RNIPI and RI values.Discussion:The accumulations of As,Pb,and Cd were mainly associated with anthropogenic sources,including coal mining and combustion,and industrial exhaust emissions.Cu,Mn,and Zn were primarily originated from the parent material(natural sources).Conclusion:This study provides scientific basis and effective countermeasures for the prevention and control of soil pollution in surrounding areas of CPB.Yiqun Zhang Di Wu Chenxing Wang Xiao Fu Gang Wu 2020Ecosystem Health and Sustainability2020,6,1:3
13Sparse Code Multiple Access-Towards Massive Connectivity and Low Latency 5G Communications显示文摘Sparse code multiple access(SCMA) is a novel non-orthogonal multiple access technology considered as a key component in 5G air interface design. In SCMA, the incoming bits are directly mapped to multi-dimensional constellation vectors known as SCMA codewords, which are then mapped onto blocks of physical resource elements in a sparse manner. The number of codewords that can be non-orthogonally multiplexed in each SCMA block is much larger than the number of resource elements therein, so the system is overloaded and can support larger number of users. The joint optimization of multi-dimensional modulation and low density spreading in SCMA codebook design ensures the SCMA receiver to recover the coded bits with high reliability and low complexity. The flexibility in design and the robustness in performance further prove SCMA to be a promising technology to meet the 5G communication demands such as massive connectivity and low latency transmissions.Lei Wang Xiuqiang Xu Yiqun Wu Shuangshuang Xing Yan Chen 2015电信网技术2015,,5:3
14Heterostructured CoFe@N-doped carbon porous polyhedron for efficient microwave absorption显示文摘The synthesis of wide bandwidth,thin thickness,and high performance microwave absorbing materials has become a hot topic of current research.Metal-organic frameworks with heterojunctions and porous structures are considered as suitable candidates to meet these characteristics.Herein,heterogeneous CoFe@N-doped porous carbon polyhedron composites were successfully synthesized via Fe^(2+)to replace Co in zeolite imidazole frame-67.The dielectric properties of composites were enhanced by the replacement of Fe^(2+),and the synergistic effect of dielectric loss and magnetic loss was realized.The petal-like lamellar structure increases the travel of electromagnetic(EM)waves,and the formation of porous structures improves impedance matching.Specifically,a reflection loss of−67.30 dB was obtained at a thickness of 2.88 mm,and an ultrabroad wide effective absorption bandwidth of 8.40 GHz was obtained,covering most of the X-band(8–12 GHz)and the whole Ku-band(12–18 GHz).The radar cross section(RCS)reduction value can reach 29.4 dB·m^(2),which means that the radar detector has a smaller probability of detecting targets.This work describes the unique advantages of metal ion replacement metal-organic frameworks derived materials in structural design,impedance matching,and performance adjustment,and provides a new reference for the field of electromagnetic wave absorption.Dan Wu Yiqun Wang Shuanglin Deng Di Lan Zhongning Xiang Qinchuan He 2023Nano Research2023,16,2:2
15Bicontinuous porous membranes with micro-nano composite structure using a facile atomization-assisted nonsolvent induced phase separation method显示文摘The micro-nano composite structure can endow separation membranes with special surface properties,but it often has the problems of inefficient preparation process and poor structural stability.In this work,a novel atomization-assisted nonsolvent induced phase separation method,which is also highly efficient and very simple,has been developed.By using this method,a bicontinuous porous microfiltration membrane with robust micro-nano composite structure was obtained via commercially available polymers of polyacrylonitrile and polyvinylpyrrolidone.The formation mechanism of the micro-nano composite structure was proposed.The microphase separation of polyacrylonitrile and polyvinylpyrrolidone components during the atomization pretreatment process and the hydrogen bonding between polyacrylonitrile and polyvinylpyrrolidone molecules should have resulted in the nano-protrusions on the membrane skeleton.The membrane exhibits superhydrophilicity in air and superoleophobicity underwater.The membrane can separate both surfactant-free and surfactant-stabilized oil-in-water emulsions with high separation efficiency and permeation flux.With excellent antifouling property and robust microstructure,the membrane can easily be recycled for long-term separation.Furthermore,the scale-up verification from laboratory preparation to continuous production has been achieved.The simple,efficient,cost-effective preparation method and excellent membrane properties indicate the great potential of the developed membranes in practical applications.Jing Wang Guoyuan Pan Yu Li Yang Zhang Hongwei Shi Xuanbo Liu Hao Yu Muhua Zhao Yiqun Liu Changjiang Wu 2022Frontiers of Chemical Science and Engineering2022,16,8:2
16Melon short internode(CmSi)encodes an ERECTA-like receptor kinase regulating stem elongation through auxin signaling显示文摘Plant height is one of the most important agronomic traits that directly determines plant architecture,and compact or dwarf plants can allow for increased planting density and land utilization as well as increased lodging resistance and economic yield.At least four dwarf/semidwarf genes have been identified in different melon varieties,but none of them have been cloned,and little is known about the molecular mechanisms underlying internode elongation in melon.Here,we report map-based cloning and functional characterization of the first semidwarf gene short internode(Cmsi)in melon,which encodes an ERECTA-like receptor kinase regulating internode elongation.Spatial-temporal expression analyses revealed that CmSI exhibited high expression in the vascular bundle of the main stem during internode elongation.The expression level of CmSI was positively correlated with stem length in the different melon varieties examined.Ectopic expression of CmSI in Arabidopsis and cucumber suggested CmSI as a positive regulator of internode elongation in both species.Phytohormone quantitation and transcriptome analysis showed that the auxin content and the expression levels of a number of genes involved in the auxin signaling pathway were altered in the semidwarf mutant,including several well-known auxin transporters,such as members of the ABCB family and PINFORMED genes.A melon polar auxin transport protein CmPIN2 was identified by protein–protein interaction assay as physically interacting with CmSI to modulate auxin signaling.Thus,CmSI functions in an auxin-dependent regulatory pathway to control internode elongation in melon.Our findings revealed that the ERECTA family gene CmSI regulates stem elongation in melon through auxin signaling,which can directly affect polar auxin transport.Sen Yang Kaige Zhang Huayu Zhu Xiaojing Zhang Wenkai Yan Nana Xu Dongming Liu Jianbin Hu Yufeng Wu Yiqun Weng Luming Yang 2020Horticulture Research2020,7,1:2
17Boosting faradaic efficiency of CO_(2)electroreduction to CO for Fe-NC single-site catalysts by stabilizing Fe^(3+)sites via F-doping显示文摘The atomically dispersed Fe^(3+)sites of Fe-N-C single-site catalysts(SSCs)are demonstrated as the active sites for CO_(2)electroreduction(CO_(2)RR)to CO but suffer from the reduction to Fe^(2+)at~−0.5 V,accompanied by the drop of CO faradaic efficiency(FECO)and deterioration of partial current(JCO).Herein,we report the construction of F-doped Fe-N-C SSCs and the electron-withdrawing character of fluorine could stabilize Fe3+sites,which promotes the FECO from the volcano-like highest value(88.2%@−0.40 V)to the high plateau(>88.5%@−0.40-−0.60 V),with a much-increased JCO(from 3.24 to 11.23 mA·cm^(−2)).The enhancement is ascribed to the thermodynamically facilitated CO_(2)RR and suppressed competing hydrogen evolution reaction,as well as the kinetically increased electroactive surface area and improved charge transfer,due to the stabilized Fe^(3+)sites and enriched defects by fluorine doping.This finding provides an efficient strategy to enhance the CO_(2)RR performance of Fe-N-C SSCs by stabilizing Fe^(3+).Yiqun Chen Guochang Li Yu Zeng Lijie Yan Xizhang Wang Lijun Yang Qiang Wu Zheng Hu 2022Nano Research2022,15,9:2
18Efficient microwave absorption achieved through in situ construction of core-shell Co Fe_(2)O_(4)@mesoporous carbon hollow spheres显示文摘Cobalt ferrite(CoFe_(2)O_(4)),with good chemical stability and magnetic loss,can be used to prepare composites with a unique structure and high absorption.In this study,CoFe_(2)O_(4)@mesoporous carbon hollow spheres(MCHS)with a core-shell structure were prepared by introducing CoFe_(2)O_(4)magnetic particles into hollow mesoporous carbon through a simple in situ method.Then,the microwave absorption performance of the CoFe_(2)O_(4)@MCHS composites was investigated.Magnetic and dielectric losses can be effectively coordinated by constructing the porous structure and adjusting the ratio of MCHS and CoFe_(2)O_(4).Results show that the impedance matching and absorption properties of the Co Fe_(2)O_(4)@MCHS composites can be altered by tweaking the mass ratio of MCHS and CoFe_(2)O_(4).The minimum reflection loss of the Co Fe_(2)O_(4)@MCHS composites reaches-29.7 dB at 5.8 GHz.In addition,the effective absorption bandwidth is 3.7 GHz,with the thickness being 2.5 mm.The boosted microwave absorption can be ascribed to the porous core-shell structure and introduction of magnetic particles.The coordination between the microporous morphology and the core-shell structure is conducive to improving the attenuation coefficient and achieving good impedance matching.The porous core-shell structure provides large solid-void and CoFe_(2)O_(4)-C interfaces to induce interfacial polarization and extend the electromagnetic waves’multiple scattering and reflection.Furthermore,natural resonance,exchange resonance,and eddy current loss work together for the magnetic loss.This method provides a practical solution to prepare core-shell structure microwave absorbents.Lianggui Ren Yiqun Wang Xin Zhang Qinchuan He Guanglei Wu 2023International Journal of Minerals,Metallurgy and Materials2023,30,3:2
19SJES14110700111350显示文摘Kesheng Wu Liang Guo Wei Xu Hengyi Xu Zoraida P. Aguilar Guomao Xu Weihua Lai Yonghua Xiong Yiqun Wan 2014Talanta2014,,:1
20Whole building energy simulation and energy saving potential analysis of a large public building显示文摘Pan Yiqun Zuo Mingming Wu Gang 2011Journal of Building Performance Simulation2011,4,1:1
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