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6篇 您的检索式:作者名="Mingde Feng"
    题名 作者 年代 出处 被引量
1Establishment of sesame germplasm core collection in China显示文摘Zhang Xiurong Zhao Yingzhong Cheng Yong Feng Xiangyun Guo Qingyuan Zhou Mingde Toby Hodgkin 2000Genetic Resources and Crop Evolution2000,,3:1
2A novel Hf-Si-O wire drawing phenomenon after ablation of SiC_(nws)/ HfC-SiC coating on C/C composites显示文摘A SiC_(nws)/HfC-SiC coating was fabricated by a two-step chemical vapor deposition.After introducing SiC nanowires,the fracture toughness of HfC-SiC coating increases by 228%.After ablation under oxyacetylene torch for 60s,a bone-like HfO_(2) reticular structure was formed in the central ablation area.Interestingly,a novel Hf-Si-O wire-drawing phenomenon was happened in the transition area of ablated SiC_(nws)/HfC-SiC coating,providing a new toughness mechanism under ablation environment.Moreover,HfO_(2) precipitated from Hf-Si-O glass wires to generate nanocrystalline grains during ablation,which explains the formation of bone-like HfO_(2) reticular structure observed from central ablation area.Mingde Tong Qiangang Fu Shuotian Yao Tianyu Liu Tao Feng Dou Hu Lei Zhou 2020Journal of Materiomics2020,6,2:0
3Quadruple-band metamaterial absorber based on the cuboid dielectric particles显示文摘In this work,a quadruple-band dielectric metamaterial absorber(MMA)was proposed and studied,which is composed of eight cuboid dielectric particles and a metallic ground plate.When electromagnetic wave is incident on the dielectric particles,dielectric particles act as resonators and produce abundant resonant modes,which can result in perfect absorption.In simulation,four absorption peaks are observed at 9.13,9.62,10.0 and 10.46 GHz with 88%,89%,100%and 96%,respectively.By adjusting geometry parameters of the dielectric particles,dielectric MMAs with different bands can be obtained.Further investigation shows that the absorption peaks can be changed by increasing the permittivity of the dielectric.Based on the designing technique of using simple cuboid dielectric particles directly acting as resonator,this work provides a simple method to construct multiband alldielectric MMA.Wenjie Wang Mingde Feng Jun Wang Zhiqiang Li Jiafu Wang Hua Ma Shaobo Qu 2018Journal of Advanced Dielectrics2018,8,4:0
4All-dielectric metamaterial frequency selective surface based on spatialarrangement ceramic resonators显示文摘In this paper,we demonstrate a method of designing all-dielectric metamaterial frequency selective surface(FSS)with ceramic resonators in spatial arrangement.Compared with the traditional way,spatial arrangement provides a flexible way to handle the permutation and combination of different ceramic resonators.With this method,the resonance response can be adjusted easily to achieve pass/stop band effects.As an example,a stop band spatial arrangement all-dielectric metamaterial FSS is designed.Its working band is in 11.65–12.23 GHz.By adjusting permittivity and geometrical parameters of ceramic resonators,we can easily modulate the resonances,band pass or band stop characteristic,as well as the working band.Liyang Li Jun Wang Mingde Feng Hua Ma Jiafu Wang Hongliang Du Shaobo Qu 2017Journal of Advanced Dielectrics2017,7,2:0
5All-dielectric metamaterial frequency selective surface显示文摘Frequency selective surface(FSS)has been extensively studied due to its potential applications in radomes,antenna reflectors,high-impedance surfaces and absorbers.Recently,a new principle of designing FSS has been proposed and mainly studied in two levels.In the level of materials,dielectric materials instead of metallic patterns are capable of achieving more functional performance in FSS design.Moreover,FSSs made of dielectric materials can be used in different extreme environments,depending on their electrical,thermal or mechanical properties.In the level of design principle,the theory of metamaterial can be used to design FSS in a convenient and concise way.In this review paper,we provide a brief summary about the recent progress in all-dielectric metamaterial frequency selective surface(ADM-FSS).The basic principle of designing ADM-FSS is summarized.As significant tools,Mie theory and dielectric resonator(DR)theory are given which illustrate clearly how they are used in the FSS design.Then,several design cases including dielectric particle-based ADM-FSS and dielectric network-based ADM-FSS are introduced and reviewed.After a discussion of these two types of ADM-FSSs,we reviewed the existing fabrication techniques that are used in building the experiment samples.Finally,issues and challenges regarding the rapid fabrication techniques and further development aspects are discussed.Jun Wang Shaobo Qu Liyang Li Jiafu Wang Mingde Feng Hua Ma Hongliang Du Zhuo Xu 2017Journal of Advanced Dielectrics2017,7,5:0
6A core-satellite-like nanoassembly reverses a decisive tyrosine hydroxylase loss in degenerative dopaminergic neurons显示文摘In recent years,neurodegenerative diseases,such as Parkinson’s or Alzheimer’s diseases,are rapidly rising in prevalence.The main hallmark of Parkinson’s disease is the falling levels of neurotransmitter dopamine in the mid-brain with dopaminergic neurons losing.Typical therapeutic solutions,including drugs,deep brain stimulation,and cell transplantation,can only alleviate the symptoms of Parkinson’s disease.It is a tremendous challenge to reverse the function degeneration of the crucial dopaminergic neurons.Herein,we develop a core-satellite-like nanoassembly(PDA-AFn(by integrating polydopamine nanoparticles and apoferritin))to raise the expression of tyrosine hydroxylase(TH),a rate-limiting enzyme in the formation of the dopamine.Both components in the nanoassembly could cooperate with each other,not only elaborately regulate the iron homeostasis and redox microenvironment,but also utilize excessive reactive oxygen species(ROS)and iron ions in the damaged neurons to supply extra dopamine and enhance TH activity,and consequently restore the function of the degenerated neurons.Remarkably,the nanoassembly-treatment relieves the dyskinesia and dramatical increases the tyrosine hydroxylase and dopamine level in the midbrain of Parkinson’s disease model mice.It is an explicit yet inspiring advance in treatment of the neurodegeneration.Ke Yao Jiamin Gan Di Zhao Mingding Li Xiaoquan Shen Yumin Yang Peijian Feng Qundong Shen 2023Nano Research2023,16,7:0
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