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| 1 | Modulating macrophage activities to promote endogenous bone regeneration: Biological mechanisms and engineering approaches显示文摘A coordinated interaction between osteogenesis and osteoimmune microenvironment is essential for successful bone healing.In particular,macrophages play a central regulatory role in all stages of bone repair.Depending on the signals they sense,these highly plastic cells can mediate the host immune response against the exterior signals of molecular stimuli and implanted scaffolds,to exert regenerative potency to a varying extent.In this article,we first encapsulate the immunomodulatory functions of macrophages during bone regeneration into three aspects,as sweeper,mediator and instructor.We introduce the phagocytic role of macrophages in different bone healing periods(‘sweeper’)and overview a variety of paracrine cytokines released by macrophages either mediating cell mobilisation,vascularisation and matrix remodelling(‘mediator’),or directly driving the osteogenic differentiation of bone progenitors and bone repair(‘instructor’).Then,we systematically classify and discuss the emerging engineering strategies to recruit,activate and modulate the phenotype transition of macrophages,to exploit the power of endogenous macrophages to enhance the performance of engineered bone tissue. | Yiming Niu Zhenzhen Wang Yuchen Shi Lei Dong Chunming Wang | 2021 | Bioactive Materials2021，6，1： | 14 |
| 2 | The microphysics of ice accretion on wires:Observations and simulations显示文摘The weather system, meteorological conditions, and microphysics of cloud, fog, and rain droplets are studied during the formation, growth, maintenance, and shedding periods of ice accretion on wires in Enshi, Hubei Province in China using 2008/2009 and 2009/2010 winter observations. The comprehensive observations include data of visibility, microphysics of fog and rain droplets, and ice thickness, as well as data from an automated weather station and other routinely recorded meteorological data. The results show that icing occurred during the passage of a cold front, with a high-pressure system and a cold temperature trough at 850 hPa, and a southeasterly at 500 hPa that provided abundant moisture. Ice formation usually started in the evening or early morning, and ice shed around noon the following day when the temperature was-1°C to 0°C. The averaged liquid water content of the fog droplet was distinctly greater during the growth period than during the other three periods, and there was precipitation during the growth period in each case of ice accretion. The growth rate of the ice thickness was clearly correlated with the liquid water content, with a correlation coefficient of 0.62. Simulations using empirical equations were carried out, and the simulated ice thickness agreed with observations fairly well. | NIU ShengJie ZHOU Yue JIA Ran YANG Jun LUE JingJing KE YiMing YANG ZhiBiao | 2012 | Science China Earth Sciences2012，55，3： | 12 |
| 3 | Facile-fabricated iron oxide nanorods as a catalyst for hydrogenation of nitrobenzene显示文摘b-FeOOH nanorods were prepared by a poly ethylene glycol(PEG) assisted precipitation of FeCl_3·6 H_2O aqueous solution with urea. Na_2CO_3 aqueous solution was introduced to maintain their shapes under annealing. The one-dimensional porous iron oxide nanorods were synthesized successfully. The asprepared catalysts were characterized by X-ray diffraction, transmission electron microscopy, N_2 adsorption-desorption isotherms and X-ray photoelectron spectroscopy. The hydrogenation of nitrobenzene to aniline was taken as probe reaction to evaluate their catalytic performance. FeOOH(iron oxides hydroxide) nanorods, fabricated by annealing b-FeOOH nanorods at 250℃ in Ar atmosphere for 4h, exhibited high catalytic activity for the transfer hydrogenation of nitrobenzene to aniline with hydrazine hydrate as hydrogen donors. | Yanshuang Ma Liyun Zhang Wen Shi Yiming Niu Bingsen Zhang Dangsheng Su | 2019 | Chinese Chemical Letters2019，30，1： | 1 |
| 4 | Statistical morphological identification of low-dimensional nanomaterials by using TEM显示文摘Nanomaterials with low-dimensional morphology display unique properties in catalysis and related fields,which are highly dependent on the structure and aspect ratio.Thus,accurate identification of the structure and morphology is the basis to correlate to the performance.However,the widely adopted techniques such as XRD is incapable to precise identify the aspect ratio of low-dimensional nanomaterials,not even to quantify the morphological uniformity with statistical deviation value.Herein,ZnO nanorod and nanosheet featured with one-and two-dimensional morphology were selected as model materials,which were prepared by the hydrothermal method and statistically characterized by transmission electron microscopy(TEM).The results indicate that ZnO nanorods and nanosheets display rod-like and orthohexagnal morphology,which mainly encapsulated with{100}and{001}planes,respectively.The 7.36±0.20 and 0.39±0.02 aspect ratio(c/a)of ZnO nanorods and nanosheets could be obtained through the integration of the(100)and(002)diffraction rings in selected area electron diffraction(SAED).TEM combining with the SAED is favorable compare with XRD,which not only provides more accurate aspect ratio results with standard deviation values but also requires very small amounts of sample.This work is supposed to provide a convenient and accurate method for the characterization of nanomaterials with low-dimensional morphology through TEM. | Yinghui Pu Yiming Niu Yongzhao Wang Siyang Liu Bingsen Zhang | 2022 | Particuology2022，20，2： | 1 |
| 5 | Pattern Analysis of Driver’s “Pressure-State-Response” in Traffic Congestion显示文摘 | Weiwei Qi Yulong Pei Mo Song Yiming Bie Huimin Niu | 2013 | Discrete Dynamics in Nature and Society2013，，： | 1 |
| 6 | Cooperative catalytic platinum species accelerating polysulfide redox reactions for Li-S batteries显示文摘The shuttle effect derived from diffusion of lithium polysulfides(LiPSs) and sluggish redox kinetic bring about poor cycling stability and low utilization of sulfur,which have always been the key challenging issues for the commercial application of lithium-sulfur(Li-S) batteries.Rational design of cathode materials to catalyze Li_(2)S dissociation/nucleation processes is an appealing and valid strategy to develop high-energy practical Li-S batteries.Herein,considering the synergistic effect of bidirectional catalysis on LiPSs conversion and enhanced chemical immobilization for LiPSs by heteroatom doping,Pt nanoparticles loaded on nitrogen-doped carbon spheres(Pt/NCS composites) were constructed as cathode materials.According to the dynamic evolution of Pt catalysts and sulfur species,Pt~0 and Pt^(2+) species were identified as active species for the accelerated dissociation and nucleation of Li_(2)S,respectively.Meanwhile,in-situ Raman results demonstrated the expedited conversion of sulfur species resulted from bidirectional catalysis of active Pt species,corresponding to boosted redox kinetics.Consequently,Pt/NCS cathode exhibited improved long-term cyclability with high initial capacity,along with enhanced rate capability.This work provides a facile approach to construct cathode materials with bidirectional catalysis on Li_(2)S dissociation/nucleation,and sheds light on a more global understanding of the catalytic mechanism of metal catalysts during LiPSs conversion. | Yujie Qi Ning Chai Qinhua Gu Junnan Chen Zhaofeng Zhai Ming Lu Yiming Niu Nan Huang Xia Zhang Bingsen Zhang | 2023 | Journal of Energy Chemistry2023，，12： | 0 |
| 7 | “SUSPENDING VILLAGE”——A MODEL OF NEW DEVELOPED AREA IN NINGXIA OF CHINA显示文摘Ningxia is located in the Northwest China. The Huanghe (Yellow River) flowsthrough from its middle--west to the north. It is a province in which the Chinese Muslim--Hui Nationality is concentrated, with about one third of the total population, hence theNingxia Hui Autonomous Region. From 1983 to 1992, more than 200000 people | Wang Yiming Niu Huien Ningxia Regional Management Office, Yinchuan, Ningxia,750001 P. R. China Dept. of Town and Country Planning, Univ. of Newcastle uponTyne, Newcastle NE1 7RU, UK | 1993 | 干旱区资源与环境1993，7，Z1： | 0 |
| 8 | ANALYTICAL DESIGN OF A MICROSTRIP UWB BPF WITH SHARP REJECTION显示文摘This paper presents a new Ultra-WideBand (UWB) BandPass Filter (BPF) using half-wavelength Stepped-Impedance Stub-Loaded Resonator (SISLR). Analytical equations derived by the even-odd mode analysis show the new filter has two tunable transmission zeros at both sides of the passband to provide a sharp rejection and seven transmission poles inside the passband to achieve U.S. UWB performance. For verification, a UWB BPF is designed, fabricated and measured. The measured results show that the fabricated filter has a -3 dB fractional bandwidth from 3.0 GHz to 10.9 GHz and its insertion loss less than 0.9 dB over the whole passband. Furthermore, the new filter exhibits a simple topology, sharp rejection, and deep stopband suppression. | Xu Jin Niu Yiming Cui Lan Miao Chen Wu Wen | 2012 | Journal of Electronics(China)2012，29，5： | 0 |
| 9 | Review of Black Start on New Power System Based on Energy Storage Technology显示文摘With the continuous development of new energy generation technology and the increasingly complex power grid environment,the traditional black start scheme cannot meet the requirements of today’s power grid in order to ensure the stable operation of the power system can be restored quickly in the face of large power outages,so a more complete black start scheme needs to be developed to cope with the new power system.With the development of energy storage technology,the limitations of the traditional black-start scheme can be solved by new energy farms with energy storage configuration.Therefore,this paper investigates the problems faced by black-start,the key technologies of energy storage assisted new energy black-start,and introduces the research related to new energy black-start technology to provide reference for future research and application of new energy black-start. | Jin Fan Litao Niu Cuiping Li Gang Zhang He Li Yiming Wang Junhui Li Qinglong Song Jiacheng Sun Jianglong Pan Fangfang Lai | 2023 | Energy Engineering2023，120，12： | 0 |
| 10 | Movement History of the Microcontinents from the Tibetan Plateau Based on Paleomagnetic Results with Sufficient Sampling Units显示文摘Paleomagnetic results cannot be applied in global and regional tectonic reconstructions unless the paleosecular variation has been adequately averaged.However,how many sampling sites and samples are enough to calculate a reliable paleopole remains debated.Based on the relation among the sampling sites N,the precision parameter k,the virtual geomagnetic pole scatter s,and the confidence limit A_(95) of the paleopole,we find that 20 sites(samples)or more are required to yield a paleopole with an A_(95)≈5°based on a review of available paleomagnetic results from the Lhasa,Qiangtang and Tethyan Himalaya.Random samplings of Jurassic virtual geomagnetic poles from the Sangri area show that the Fisher mean pole with neglectable angle deviation can be obtained when sampling sites increase to 20.High-quality paleomagnetic results,with sites/samples number N/n≥~20–30,show that the Qiangtang,Lhasa,and Tethyan Himalaya moved northward in the Late Permian–Middle Triassic,Jurassic,and Cretaceous,respectively,and then accreted to Asia in the Late Triassic,Late Jurassic–Early Cretaceous and Paleocene–Early Eocene,respectively. | Yiming Ma Weimin Ruan Chao Niu Tianshui Yang | 2022 | Journal of Earth Science2022，33，5： | 0 |
| 11 | Seismic rock physics modeling of fractures and fluids in a tight gas sandstone reservoir显示文摘Tight sandstone gas reservoirs have characteristics of low porosity and low permeability,complex pore structure.In the paper,we consider the pore and micro-fracture systems in tight sandstone reservoir and perform rock physics modeling of sandstone gas reservoirs based on Chapman.Then we analyze the effects of relaxation time,and difference fluid types on dispersion and attention,and seismic responses.We found that the magnitude of the relaxation time is related to the gas saturation and the viscosity coefficient of the fluid.The magnitude of the relaxation time affects the frequency range of the velocity dispersion and attenuation,and the type of fluid affects the magnitude of the velocity dispersion and attenuation.As the relaxation time decreases,the calculated amplitude deceases.And the amplitude and the waveform of the synthetic seismic record are related to different fluid types and formation thickness. | Han Jin Zhiqi Guo Yiming Zhang Cong Niu Di Wang Yun Ling | 2021 | Earthquake Research Advances2021，1，S01： | 0 |
| 12 | Chemical Electron Microscopy(CEM)for Heterogeneous Catalysis at Nano:Recent Progress and Challenges显示文摘Chemical electron microscopy(CEM),a toolbox that comprises imaging and spectroscopy techniques,provides dynamic morphological,structural,chemical,and electronic information about an object in chemical environment under conditions of observable performance.CEM has experienced a revolutionary improvement in the past years and is becoming an effective characterization method for revealing the mechanism of chemical reactions,such as catalysis.Here,we mainly address the concept of CEM for heterogeneous catalysis in the gas phase and what CEM could uniquely contribute to catalysis,and illustrate what we can know better with CEM and the challenges and future development of CEM. | Yinghui Pu Bowen He Yiming Niu Xi Liu Bingsen Zhang | 2023 | Research2023，，3： | 0 |
| 13 | Tailoring the surface structure of iron compounds to optimize the selectivity of 3-nitrostyrene hydrogenation reaction over Pt catalyst显示文摘Selective hydrogenation of substituted nitroarenes is an important reaction to obtain amines.Supported metal catalysts are wildly used in this reaction because the surface structure of supports can tune the properties of the supported metal nanoparticles(NPs)and promote the selectivity to amines.Herein,Pt NPs were immobilized on Fe OOH,Fe_(3)O_(4)andα-Fe_2O_(3)nanorods to synthesize a series of iron compounds supported Pt catalysts by liquid phase reduction method.Chemoselective hydrogenation of 3-nitrostyrene to 3-aminostyrene was used as probe reaction to evaluate the performance of the catalysts.The results show that Pt/Fe OOH exhibits the highest selectivity and activity.Fe OOH support with pores and-OH groups can tune the electronic structure of Pt NPs.The positive charge of Pt NPs supported on Fe OOH is key factor for improving the catalytic performance. | Ying Zhang Tongtong Gao Chengshan Dai Liyun Zhang Yiming Niu Junnan Chen Zhong-Wen Liu Bingsen Zhang | 2022 | Chinese Chemical Letters2022，33，6： | 0 |
| 14 | Identify fine microstructure of multifarious iron oxides via O K-edge EELS spectra显示文摘Relying on the electron energy loss spectrum(EELS)of metallic elements to obtain microstructure analysis is an investigation method of the reaction mechanisms of transition metal oxides(TMOs)in catalysis,energy storage and conversion.However,the low signal from K shell owing to insufficient electron beam energy,and the complicated electronic structure in L shell of the metal element restrict the analysis of the coordination environment of the TMOs.Herein,density functional theory(DFT)calculation,Fourier transform(FT)and wavelet transform(WT)were employed to probe the relationship between the four individual peaks in O K-edge spectra of iron oxides and the microstructure information(chemical bonds and atomic coordination).The findings show that the peak amplitude ration is in a linear correlation with the valence state of Fe element,and that the coordination number obtained by radial distribution function(RDF)is favorably linearly correlative with that from the standard coordination structure model.As a result,the quantitative analysis on the change of valence state and atomic coordination in microstructure can be realized by EELS O K-edge spectra.This study establishes EELS O K-edge spectrum as a promising pathway to quantitatively analyze the valence state and atomic coordination information of TMOs,and offers an effective method to conduct microstructure analysis via the EELS spectra of the non-metal element. | Junnan Chen Yujie Qi Ming Lu Yiming Niu Bingsen Zhang | 2022 | Chinese Chemical Letters2022，33，9： | 0 |
| 15 | Finned Zn-MFI zeolite encapsulated noble metal nanoparticle catalysts for the oxidative dehydrogenation of propane with carbon dioxide显示文摘Oxidative dehydrogenation of propane with carbon dioxide(CO_(2)-ODP)characterizes the tandem dehydrogenation of propane to propylene with the reduction of the greenhouse gas of CO_(2)to valuable CO.However,the existing catalyst is limited due to the poor activity and stability,which hinders its industrialization.Herein,we design the finned Zn-MFI zeolite encapsulated noble metal nanoparticles(NPs)as bifunctional catalysts(NPs@Zn-MFI)for CO_(2)-ODP.Characterization results reveal that the Zn2+species are coordinated with the MFI zeolite matrix as isolated cations and the NPs of Pt,Rh,or Rh Pt are highly dispersed in the zeolite crystals.The isolated Zn2+cations are very effective for activating the propane and the small NPs are favorable for activating the CO_(2),which synergistically promote the selective transformation of propane and CO_(2)to propylene and CO.As a result,the optimal 0.25%Rh0.50%Pt@Zn-MFI catalyst shows the best propylene yield,satisfactory CO_(2)conversion,and long-term stability.Moreover,considering the tunable synergetic effects between the isolated cations and NPs,the developed approach offers a general guideline to design more efficient CO_(2)-ODP catalysts,which is validated by the improved performance of the bifunctional catalysts via simply substituting Sn4+cations for Zn2+cations in the MFI zeolite matrix. | En-Hui Yuan Yiming Niu Xing Huang Meng Li Jun Bao Yong-Hong Song Bingsen Zhang Zhao-Tie Liu Marc-Georg Willinger Zhong-Wen Liu | 2023 | Journal of Energy Chemistry2023，，5： | 0 |
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