|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Characteristics and formation mechanism of regional haze episodes in the Pearl River Delta of China显示文摘To investigate the characteristics and the specific mechanism of continuous haze,comprehensive measurements were conducted from 15 October to 19 November in the Atmospheric Environment Monitoring Super-Station in Heshan of Guangdong province.Five haze episodes occurred in October and November 2014 in the Pearl River Delta(PRD)region. The meteorological parameters, gas data, chemical compositions, and optical parameters of the aerosols were obtained. Among these events, the second haze episode,with the highest concentration of PM2.5 of 187.51 μg/m^3, was the most severe. NO^3-was always higher than SO_4^(2-), which indicated that motor vehicles played an important role in the haze, even though the oxidation rate from SO_2 to SO_4^(2-)was faster than that of NOXto NO_3^-. The difference between the hourly averages of Na+and K+during the haze episode and clean days was small, implying that straw combustion and sea salt had no significant effect on the occurrence of haze, and the backward trajectories of the air masses also conformed with this result. The air pollutants were difficult to disperse because of the significant decrease in the planetary boundary layer(PBL) height. Relative humidity played a crucial role in the formation of haze by leading to hygroscopic growth of the diameter of aerosols. | Wenguang Li Xingang Liu Yuanhang Zhang Kang Sun Yusheng Wu Rui Xue Limin Zeng Yu Qu Junling An | 2018 | Journal of Environmental Sciences2018，30，1： | 11 |
| 2 | Nitrogen Biological Cycle Characteristics of Seepweed(Suaeda salsa) Wetland in Intertidal Zone of Huanghe(Yellow) River Estuary显示文摘From April 2008 to November 2009,the nitrogen(N) cycle of plantsoil system in seepweed(Suaeda salsa) wetland in the intertidal zone of the Huanghe(Yellow) River estuary was studied.Results showed that soil N had sig-nificant seasonal fluctuations and vertical distribution,and the net N mineralization rates in topsoil were significantly different in growing season(p < 0.01).The N/P ratio(9.87 ± 1.23) of S.salsa was less than 14,indicating that plant growth was limited by N.The N accumulated in S.salsa litter at all times during decomposition,which was ascribed to the N immobilization by microbes from the environment.Soil organic N was the main N stock of plant-soil system,accounting for 97.35% of the total N stock.The N absorption and utilization coefficients of S.salsa were very low(0.0145 and 0.3844,respectively),while the N cycle coefficient was high(0.7108).The results of the N turnovers among compartments of S.salsa wetland showed that the N uptake amount of aboveground part and root were 7.764 g/m2and 4.332 g/m2,respectively.The N translocation amounts from aboveground part to root and from root to soil were 3.881 g/m2 and 0.626 g/m2,respectively.The N translocation amount from aboveground living body to litter was 3.883 g/m2,the annual N return amount from litter to soil was more than 0.125(-) g/m2(minus represented immobilization),and the net N mineralization amount in topsoil(0-15 cm) in growing season was 1.190 g/m2.The assessment of N biological cycle status of S.salsa wetland indicated that N was a very important limiting factor and the ecosystem was situated in unstable and vulnerable status.The S.salsa was seemingly well adapted to the low-nutrient status and vulnerable habitat,and the N quantitative relationships determined in the compartment model might provide scientific base for us to reveal the special adaptive strategy of S.salsa to the vulnerable habitat in the following studies. | SUN Zhigao MOU Xiaojie SUN Jingkuan SONG Hongli YU Xiang WANG Lingling JIANG Huanhuan SUN Wanlong SUN Wenguang | 2012 | Chinese Geographical Science2012，22，1： | 9 |
| 3 | Construction of the Chinese Veteran Clinical Research (CVCR) Platform for the assessment of non-communicable diseases显示文摘 | Tan Jiping Li Nan Gao Jing Guo Yuhe Hu Wei Yang Jinsheng Yu Baocheng Yu Jianmin Du Wei Zhang Wenjun Cui Lianqi Wang Qingsong Xia Xiangnan Li Jianjun Zhou Peiyi Zhang Baohe Liu Zhiying Zhang Shaogang Sun Lanying Liu Nan Deng Ruixiang Dai Wenguang Yi Fang Chen Wenjun Zhang Yongqing Xue Shenwu Cui Bo Zhao Yiming Wang Luning | 2014 | Chinese Medical Journal2014，，3： | 3 |
| 4 | Construction of bifunctional single-atom catalysts on the optimized β-Mo_(2)C surface for highly selective hydrogenation of CO_(2) into ethanol显示文摘Green and economical CO_(2)utilization is significant for CO_(2)emission reduction and energy development.Here,the 1D Mo_(2)C nanowires with dominant(101)crystal surfaces were modified by the deposition of atomic functional components Rh and K.While unmodifiedβMo_(2)C could only convert CO_(2)to methanol,the designed catalyst of K_(0.2)Rh_(0.2)/β-Mo_(2)C exhibited up to 72.1%of ethanol selectivity at 150℃.It was observed that the atomically dispersed Rh could form the bifunctional active centres with the active carrierβMo_(2)C with the synergistic effects to achieve highly specific controlled C–C coupling.By promoting the CO_(2)adsorption and activation,the introduction of an alkali metal(K)mainly regulated the balanced performance of the two active centres,which in turn improved the hydrogenation selectivity.Overall,the controlled modification ofβMo_(2)C provides a new design strategy for the highly efficient,lowtemperature hydrogenation of CO_(2)to ethanol with single-atom catalysts,which provides an excellent example for the rational design of the complex catalysts. | Xue Ye Junguo Ma Wenguang Yu Xiaoli Pan Chongya Yang Chang Wang Qinggang Liu Yanqiang Huang | 2022 | Journal of Energy Chemistry2022，31，4： | 2 |
| 5 | Insights into the phenomenon of an explosive growth and sharp decline in haze:A case study in Beijing显示文摘A severe haze episode occurred in winter in the North China Plain(NCP),and the phenomenon of an explosive growth and sharp decline in PM2.5(particulate matter with an aerodynamic diameter equal to or less than 2.5μm)concentration was observed.To study the systematic causes for this phenomenon,comprehensive observations were conducted in Beijing from November 26 to December 2,2015;during this period,meteorological parameters,LIDAR data,and the chemical compositions of aerosols were determined.The haze episode was characterized by rapidly varying PM2.5 concentration,and the highest PM2.5 concentration reached 667μg/m3.During the haze episode,the NCP was dominated by a weak high-pressure system and continuously low PBL(planetary boundary layer)heights,which are unfavorable conditions for the diffusion of pollutants.The large increases in the concentrations of SNA(SO42-,NO3-and NH4+)during the haze implied that the formation of SNA was the largest contribution.Water vapor also played a vital role in the formation of haze by promoting the chemical transformation of secondary pollutants,which led to higher PM2.5 concentrations.The spatial distributions of PM2.5 in Beijing at different times and the backward trajectories of the air masses also indicated that pollutants from surrounding provinces in particular,contributed to the higher PM2.5concentration. | Wenguang Li Xingang Liu Yuanhang Zhang Qinwen Tan Miao Feng Mengdi Song Lirong Hui Yu Qu Junling An Haokai Gao | 2019 | Journal of Environmental Sciences2019，31，10： | 1 |
| 6 | Effect of nickel hydroxide composition on the electrochemical performance of spherical Ni(OH)2 positive materials for Ni-MH batteries显示文摘 | Zhang Wenguang Jiang Wenquan Yu Limin | 2009 | Int J Hydrogen Energy2009，34，： | 1 |
| 7 | Effect of Initial Principal Stress Direction on the Dynamic Characteristics of Carbonate Sand显示文摘The dynamic characteristics of carbonate sand under wave loads are very important for constructions on the ocean floor. The initial principal stress direction has been known to exert some influence on the dynamic characteristics of sand during cyclic loading. In an effort to investigate this aspect of the problem, several series of cyclic undrained tests were carried out on a saturated and loose sample of carbonate sand using a geotechnical static and dynamic universal triaxial shear apparatus. In this test apparatus, a hollow cylindrical sand specimen is subjected to a simultaneous application of both triaxial and torsional modes of shear stresses, which brings about the continuous rotation of principal stress axes. The test results indicated that the initial principal stress direction has a considerable influence on the dynamic strength of loose carbonate sand and with the increase of initial orientation of principal stress, dynamic strength will be reduced, the cyclic pore pressure increased, but the residual pore pressure reduced. | Yu Haizhen Zhao Wenguang Wang Ren Li Jianguo He Yang | 2005 | Journal of China University of Geosciences2005，16，4： | 1 |
| 8 | The synthesis of octahedral nanoparticles of magnetite显示文摘 | Yu Wenguang Zhang Tonglai Zhang Jianguo | 2006 | Material letters2006，60，24： | 1 |
| 9 | Visiblelight photocatalytic activity and deactivation mechanism of Ag3PO4spherical particles显示文摘 | Wang Wenguang Cheng Bei Yu Jiaguo | 2012 | Chem Asian J2012，7，： | 1 |
| 10 | Visible light photocatalytic activity and deactivation mechanism of Ag3-PO4spherical particles显示文摘 | Wang Wenguang Cheng Bei Yu Jiaguo | 2012 | Chem Asian J2012，7，： | 1 |
| 11 | A m-type risk model with markov-modulated premium rate显示文摘 | YU Wenguang | 2009 | Journal of Applied Mathematics and Inforrnat- ics2009，27，56： | 1 |
| 12 | Sulfur retention efficiency of clean coke produced by co-pyrolysis of coal with CaCO_(3) to substitute household coal显示文摘Raw coal is used by many suburban and rural households for cooking and heating and results in severe air pollution,especially problematic SO_(2) emissions.A source treatment strategy was proposed to reduce SO_(2) emissions,which used the co-pyrolysis of raw coal with a CaCO3 additive to produce clean coke.The effect of Ca/S molar ratio on the SO_(2) capture efficiency of clean coke was investigated,and the SO_(2) retention efficiency was optimized at a Ca/S molar ratio of 1.5.The sulfur retention mechanism of clean coke was attributed to:(1)CaCO3 decomposition to CaO and partial reaction of CaO with H2S to generate CaS during pyrolysis.(2)Transformation of the remaining sulfur in the clean coke to SO_(2) during combustion,capture by unreacted CaO to form CaSO_(4),and direct oxidation of CaS to CaSO_(4).The feasibility of SO_(2) emission reduction by clean coke in a practical household stove was verified. | Shoujun Liu Mingyi Wang Kaixia Zhang Zhongliang Yu Song Yang Ju Shangguan Guoqiang Zhang Wenguang Du Jin Li Yuehua Liu | 2021 | Carbon Resources Conversion2021，4，1： | 0 |
| 13 | An anti-bacterial porous shape memory self-adaptive stiffened polymer for alveolar bone regeneration after tooth extraction显示文摘The regeneration of alveolar bone after tooth extraction is critical for the placement of dental implants.Developing a rigid porous scaffold with defect shape adaptability is of great importance but challenging for alveolar bone regeneration.Herein,we design and synthesize a biocompatible poly(L-glutamic acid)-g-poly(ε-caprolactone)(PLGA-g-PCL)porous shape memory(SM)polymer.The PLGA-g-PCL is then copolymerized with acryloyl chloride grafted poly(ω-pentadecalactone)(PPDLDA)having a higher phase transition temperature than shape recovery temperature to maintain stiffness after shape recovery to resist chewing force.The hybrid pol-ydopamine/silver/hydroxyapatite(PDA/Ag/HA)is coated to the surface of(PLGA-g-PCL)-PPDL scaffold to afford the anti-bacterial activity.The porous SM scaffold can be deformed into a compact size and administered into the socket cavity in a minimally invasive mode,and recover its original shape with a high stiffness at body tem-perature,fitting well in the socket defect.The SM scaffold exhibits robust antibacterial activity against Staphy-lococcus aureus(S.aureus).The porous microstructure and cytocompatibility of PLGA allow for the ingrowth and proliferation of stem cells,thus facilitating osteogenic differentiation.The micro-CT and histological analyses demonstrate that the scaffold boosts efficient new bone regeneration in the socket of rabbit mandibular first premolar.This porous shape memory self-adaptive stiffened polymer opens up a new avenue for alveolar bone regeneration. | Weijun Zhang Meilin Yu Yongqiang Cao Zihan Zhuang Kunxi Zhang Dong Chen Wenguang Liu Jingbo Yin | 2023 | Bioactive Materials2023，，3： | 0 |
| 14 | Modern Ecological Chicken Raising and Its Research Progress显示文摘Modern ecological breeding has the characteristics of protecting the ecological environment,health,nutrition,delicious,and so on.In the ecological breeding of traditional breeding chicken,using non antibiotic breeding,traditional Chinese medicine and other breeding technologies can not only obtain green,non-harmful and safe food products,but also reduce the cost of farmers and provide breeding efficiency This is a sustainable development path.This paper gave a brief overview of this field. | Qian HUANG Yinfeng ZHAO Wenguang FENG Kaiqiang ZHAO Wenwen YU Xin HE Lili JI | 2021 | Agricultural Biotechnology2021，10，4： | 0 |
| 15 | Design of advanced porous silver powder with high-sintering activity to improve silicon solar cells显示文摘Silver(Ag)paste is widely used in semiconductor metallization,especially in silicon solar cells.Ag powder is the material with the highest proportion in Ag paste.The morphology and structure of Ag powder are crucial which determine its characteristics,especially for the sintering activity.In this work,a simple method was developed to synthesize a type of microcrystalline spherical Ag particles(SP-A)with internal pores and the structural changes and sintering behavior were thoroughly studied by combining ultra-small-angle X-ray scattering(USAXS),small-angle X-ray scattering(SAXS),in-situ heating X-ray diffraction(XRD),focused ion beam(FIB),and thermal analysis measurement.Due to the unique internal pores,the grain size of SP-A is smaller,and the coefficient of thermal expansion(CTE)is higher than that of traditional solid Ag particles.As a result,the sintering activity of SP-A is excellent,which can form a denser sintered body and form silver nanoparticles at the Ag–Si interface to improve silver silicon contact.Polycrystalline silicon solar cell built with SP-A obtained a low series resistance(Rs)and a high photoelectric conversion efficiency(PCE)of 19.26%.These fill a gap in Ag particle structure research,which is significant for the development of high-performance electronic Ag particles and efficient semiconductor devices. | Yongsheng Li Ziwei Chen Rui Zhou Wenguang Zhao Mu Li Jun Chen Zhongyuan Huang Jian Liu Yuhang Li Maolin Yang Minghan Yu Dong Zhou Yuan Lin Feng Pan | 2024 | Nano Research2024，17，4： | 0 |
| 16 | Rational design of CO_(2)electroreduction cathode via in situ electrochemical phase transition显示文摘CO_(2)electroreduction reaction(CO_(2)RR),combined with solid oxide electrolysis cells(SOECs),is a feasible technology for the storage of renewable electric energy,while its development is limited by the catalytic activity and stability on cathodes.Here,a novel garnet oxide(Gd_(3)Fe_(5)O_(12))cathode is designed,where the garnet oxide is converted to perovskite oxide and iron via in situ electrochemical phase transition during CO_(2)electroreduction,resulting in high activity with Faradaic efficiency close to 100%and great stability over 1000 h galvanostatic test.A variety of experimental characterizations and density functional theory calculations indicate that in situ exsolved Fe clusters can effectively enhance the adsorption energies of intermediates and lowering the CO_(2)dissociation barriers.Microkinetic modelling confirms that CO_(2)RR goes through a dissociative adsorption mechanism and the electronic transfer for CO_(2)dissociation is the rate-determining step. | Shiqing Hu Huan Li Xue Dong Zhongwei Cao Bingjie Pang Liming Zhang Wenguang Yu Jianping Xiao Xuefeng Zhu Weishen Yang | 2022 | Journal of Energy Chemistry2022，31，3： | 0 |
| 17 | LotusSQL:SQL Engine for High-Performance Big Data Systems显示文摘In recent years,Apache Spark has become the de facto standard for big data processing.SparkSQL is a module offering support for relational analysis on Spark with Structured Query Language(SQL).SparkSQL provides convenient data processing interfaces.Despite its efficient optimizer,SparkSQL still suffers from the inefficiency of Spark resulting from Java virtual machine and the unnecessary data serialization and deserialization.Adopting native languages such as C++could help to avoid such bottlenecks.Benefiting from a bare-metal runtime environment and template usage,systems with C++interfaces usually achieve superior performance.However,the complexity of native languages also increases the required programming and debugging efforts.In this work,we present LotusSQL,an engine to provide SQL support for dataset abstraction on a native backend Lotus.We employ a convenient SQL processing framework to deal with frontend jobs.Advanced query optimization technologies are added to improve the quality of execution plans.Above the storage design and user interface of the compute engine,LotusSQL implements a set of structured dataset operations with high efficiency and integrates them with the frontend.Evaluation results show that LotusSQL achieves a speedup of up to 9 in certain queries and outperforms Spark SQL in a standard query benchmark by more than 2 on average. | Xiaohan Li Bowen Yu Guanyu Feng Haojie Wang Wenguang Chen | 2021 | Big Data Mining and Analytics2021，4，4： | 0 |
| 18 | A Programmable Inchworm-Inspired Soft Robot Powered by a Rotating Magnetic Field显示文摘With the growing demand for miniaturized workspaces,the demand for microrobots has been increasing in robotics research.Compared to traditional rigid robots,soft robots have better robustness and safety.With a flexible structure,soft robots can undergo large deformations and achieve a variety of motion states.Researchers are working to design and fabricate flexible robots based on biomimetic principles,using magnetic fields for cable-free actuation.In this study,we propose an inchworm-shaped soft robot driven by a magnetic field.First,a robot is designed and fabricated and force analysis is performed.Then,factors affecting the soft robot’s motion speed are examined,including the spacing between the magnets and the strength and frequency of the magnetic field.On this basis,the motion characteristics of the robot in different shapes are explored,and its motion modes such as climbing are experimentally investigated.The results show that the motion of the robot can be controlled in a two-dimensional plane,and its movement speed can be controlled by adjusting the strength of the magnetic field and other factors.Our proposed soft robot is expected to find extensive applications in various fields. | Honglin Shen Shuxiang Cai Zhen Wang Zheng Yuan Haibo Yu Wenguang Yang | 2023 | Journal of Bionic Engineering2023，20，2： | 0 |
| 19 | Synthetic[FeFe]-H_2ase models bearing phosphino thioether chelating ligands显示文摘A series of{2Fe3S}complexes bearing phosphino thioether chelating ligand were synthesized on the basis of Fe_2(Me_2pdt)(1,2-Cy_2PC_6H_4SMe)(CO)_4(Me_2pdt=Me_2C(CH_2S^1)_2,1).The disubstituted Fe(Ⅰ)Fe(Ⅰ)compound 1 exhibits a reversible one-electron redox even for[Fe(Ⅰ)Fe(Ⅱ)]^(+/0)couple.Based on the oxidation of 1 to[1]^+,the tri-substituted[Fe(Ⅰ)Fe(Ⅱ)]^+cationic complex[Fe_2(Me_2pdt)(1,2-Cy_2PC_6H_4SMe)(PPh_3)(CO)_3]^+([2]^+)was synthesized.Reduction of[2]^+provided the neutral tri-substituted Fe(Ⅰ)Fe(Ⅰ)compound 2.The substitution of the CO in 1 ligand by PPh_3results in an anodic shift of the Fe^(Ⅱ)Fe~Ⅰ/Fe_ⅠFe_(Ⅰ )couple of 470 mV.Most importantly,this substitution also leads to the Fe-Fe bonds in 1 and 2 with large Lewis basicity difference,i.e.DpK_a^(MeCN)$10. | Yingjie Zhao Xin Yu Huilan Hu Xinlong Hu Sakthi Raje Raja Angamuthu Chen-Ho Tung Wenguang Wang | 2018 | Chinese Chemical Letters2018，29，11： | 0 |
| 20 | Comparative Genomics Reveals Evolutionary Drivers of Sessile Life and Left-right Shell Asymmetry in Bivalves显示文摘Bivalves are species-rich mollusks with prominent protective roles in coastal ecosystems.Across these ancient lineages,colony-founding larvae anchor themselves either by byssus production or by cemented attachment.The latter mode of sessile life is strongly molded by left-right shell asymmetry during larval development of Ostreoida oysters such as Crassostrea hongkongensis.Here,we sequenced the genome of C.hongkongensis in high resolution and compared it to reference bivalve genomes to unveil genomic determinants driving cemented attachment and shell asymmetry.Importantly,loss of the homeobox gene Antennapedia(Antp)and broad expansion of lineagespecific extracellular gene families are implicated in a shift from byssal to cemented attachment in bivalves.Comparative transcriptomic analysis shows a conspicuous divergence between leftright asymmetrical C.hongkongensis and symmetrical Pinctada fucata in their expression profiles.Especially,a couple of orthologous transcription factor genes and lineage-specific shell-related gene families including that encoding tyrosinases are elevated,and may cooperatively govern asymmetrical shell formation in Ostreoida oysters. | Yang Zhang Fan Mao Shu Xiao Haiyan Yu Zhiming Xiang Fei Xu Jun Li Lili Wang Yuanyan Xiong Mengqiu Chen Yongbo Bao Yuewen Deng Quan Huo Lvping Zhang Wenguang Liu Xuming Li Haitao Ma Yuehuan Zhang Xiyu Mu Min Liu Hongkun Zheng Nai-Kei Wong Ziniu Yu | 2022 | Genomics, Proteomics & Bioinformatics2022，20，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员