Search

Your search keyword '"Ji, Xiaoli"' showing total 700 results
Start Over Author "Ji, Xiaoli"
700 results on '"Ji, Xiaoli"'

157. Preparation of Multiwalled Carbon Nanotube/Si3N4/Polyaniline Ternary Composites and Their Microwave Absorption Properties

Author

Ji, Xiaoli, Qiao, Ruochen, Xu, Zhihao, Liu, Jian, and Yuan, Haoze

Abstract

Herein, multiwalled carbon nanotube (MWCNT)/silicon nitride (Si3N4)/polyaniline (PANI) ternary composites are prepared. The preparation method involves attaching carboxyl groups to acid‐modified MWCNT surfaces and amino groups to Si3N4surfaces modified using a silane‐coupling agent. Then they are combined to binary composites using the solvent‐thermal method. Finally, the ternary composites are prepared by coating PANI on the surface of MWCNT/Si3N4composites in situ polymerization. The morphology and structure of these composites are characterized through X‐ray diffraction, Fourier‐transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and X‐ray photoelectron spectroscopy. Results show that the reflection loss at 8.8 GHz reaches −42.57 dB when the feeding ratio of MWCNT:Si3N4:PANI is 3:20:40 and the corresponding effective absorption bandwidth reaches 4.06 GHz when the thickness is 3.5 mm. A conductive network with effective electron leaps is formed among MWCNT, Si3N4, and PANI, which increases the conductive loss of the composites. An abundant number of interfaces have formed in the composite materials and promoted dielectric loss. Multiple loss mechanisms and good impedance matching performance endow MWCNT/Si3N4/PANI with excellent microwave absorption performance, and the incorporation of Si3N4enables the composites to exhibit satisfactory high‐temperature resistance. Thus, these performances render the composites promising materials to address increasing electromagnetic pollution, particularly at high temperatures. Silicon nitride (Si3N4) has attracted attention for its potential use in the direction of wave absorption due to its excellent mechanical strength and high‐temperature stability. Herein, the wave absorption properties of multiwalled carbon nanotubes/Si3N4/polyaniline composites are mainly investigated. The results show that the material can better mitigate electromagnetic wave pollution and good high‐temperature resistance. Thus, these performances render the composites promising materials to address increasing electromagnetic pollution, particularly at high temperatures.

Published
2024
Full Text
View/download PDF

159. Generation of an induced pluripotent stem cell line from an Alström Syndrome patient with ALMS1 mutation (c.3902C > A, c.6436C > T) and a gene correction isogenic iPSC line

Author

Ji, Xiaoli, primary, Tang, Qingyuan, additional, Tang, Chuanqing, additional, Wu, Ziyan, additional, Ma, Ling, additional, Guo, Xiaohong, additional, Cheng, Guoqiang, additional, Chen, Yuejun, additional, Yang, Tong, additional, Xiong, Man, additional, and Zhou, Wenhao, additional

Published
2020
Full Text
View/download PDF

161. Time series analysis of microbiome and metabolome at multiple body sites in steady long-term isolation confinement

Author

Feng, Qiang, primary, Lan, Xiang, additional, Ji, Xiaoli, additional, Li, Meihui, additional, Liu, Shili, additional, Xiong, Jianghui, additional, Yu, Yanbo, additional, Liu, Zhipeng, additional, Xu, Zi, additional, He, Li, additional, Chen, Ying, additional, Dong, Haisheng, additional, Chen, Pu, additional, Chen, Bin, additional, He, Kunlun, additional, and Li, Yinghui, additional

Published
2020
Full Text
View/download PDF

163. Vehicle classification applying many‐to‐one input network architecture in 77‐GHz FMCW radar.

Author

Jiang, Haodong, Zhang, Li, Wang, Ke, Guo, Yaozu, Yan, Feng, and Ji, Xiaoli

Subjects
RADAR signal processing, COMPUTER network architectures, CONVOLUTIONAL neural networks, ARTIFICIAL neural networks, IMAGE processing
Abstract

In this paper, we proposed a Many‐to‐One Input Network Architecture (MOINA) for the classification of similar structured vehicles (bus, truck and car). The inputs of the architecture are the multiple‐masked region‐of‐interest of the same detected vehicle from Range‐Doppler maps, which are acquired by FMCW radar. The proposed method is trained with a supervised system yielding a classification accuracy of 98%. MOINA shows good classification performance in a practical situation. Besides, the F1‐score of buses, trucks and cars are 98.7%, 98.0% and 97.6%, respectively. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

171. Polarization‐Independent Indium Phosphide Nanowire Photodetectors

Author

Luo, Ming‐Cheng, primary, Ren, Fang‐Fang, additional, Gagrani, Nikita, additional, Qiu, Kai, additional, Wang, Qianjin, additional, Yu, Le, additional, Ye, Jiandong, additional, Yan, Feng, additional, Zhang, Rong, additional, Tan, Hark Hoe, additional, Jagadish, Chennupati, additional, and Ji, Xiaoli, additional

Published
2020
Full Text
View/download PDF

183. D-xylose-derived carbon microspheres modified by CuFe2O4 nanoparticles with excellent microwave absorption properties.

Author

Bai, Linghan, Xing, Honglong, Ji, Xiaoli, and Yang, Ping

Subjects
MICROWAVE materials, MAGNETIC flux leakage, ABSORPTION, MICROWAVES, COPPER ferrite
Abstract

In this work, we studied the preparation and microwave absorption properties of D-xylose-derived carbon materials modified by CuFe2O4 nanoparticles and discussed the influence of the addition amount of carbon materials. It was prepared with a simple hydrothermal method, and various methods are used to characterize its microscopic morphology, chemical structure and microwave absorption properties.Results show that the modification of copper ferrite nanoparticles is effective in mitigating polarization and magnetic losses, enhancing the microwave absorption properties of the samples and absorption curves of the composite materials change from a single peak to double peaks. Comparing all samples it can be concluded that the effective absorption bandwidth of CuFe2O4 composite materials containing carbon microspheres (CuFe2O4/CMs-0.3) is 6.24 GHz. The minimum reflection loss (RL) is − 50.4 dB at 14.64 GHz. The thickness of the above corresponds to 2.5 mm. This work not only provides a reference method for the preparation of microwave absorbing materials but also contributes to the understanding of absorption mechanisms. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

184. Study on chemical stability and modification of geopolymers.

Author

JI Xiaoli, ZHONG Shiyun, and LI Xi

Abstract

Geopolymer materials have excellent properties such as high strength, high toughness, corrosion resistance, fire resistance and sealing of heavy metals. It has always been a research hotspot in the field of civil engineering, but the research on geopolymer materials is still lack of systematicness. According to the research results of geopolymer materials by scholars at home and abroad in recent years, aiming at the unique performance characteristics and the excellent chemical stability of geopolymer, the freeze-thaw cycle and calcination test of geopolymer were analyzed and summarized from the macroscopic and microscopic perspectives, and the difference in corrosion resistance between geopolymer and ordinary Portland cement was compared. The toughening modification methods and research results of geopolymer materials were reviewed. The application of geopolymer materials in construction industry is summarized, and the application prospect of geopolymer materials in construction industry is briefly analyzed. [ABSTRACT FROM AUTHOR]

Published
2021

185. One-pot thermal decomposition of commercial organometallic salt to Fe2O3@C–N and MnO@C–N for lithium storage.

Author

Wei, Denghu, Xu, Leilei, Jiao, Ranran, Zhong, Zhenlei, Ji, Xiaoli, and Zeng, Suyuan

Subjects
LITHIUM cell electrodes, FERRIC oxide, CHEMICAL decomposition, SALT, IRON oxide nanoparticles, STORAGE, ANODES, ETHYLENEDIAMINETETRAACETIC acid
Abstract

Iron oxide (Fe2O3) nanoparticles encapsulated in the N-doped carbon framework (Fe2O3@C–N) were synthesized via a one-step thermal decomposition reaction of commercial C10H12FeN2NaO8 (ethylenediaminetetraacetic acid monosodium ferric salt), which can serve as the source of Fe, O, C, and N. As an anode material for lithium storage, the Fe2O3@C–N sample exhibits a reversible capacity of 1072 mA h g−1 after 200 cycles at 0.2 A g−1 and 553 mA h g−1 after 500 cycles at 0.5 A g−1. Furthermore, the synthetic strategy can be simply extended to prepare other similar products, e.g. MnO@C–N and ZnO@C–N. The MnO@C–N anode also shows good cycling performances (915 mA h g−1 after 200 cycles at 0.2 A g−1 and 768 mA h g−1 after 500 cycles at 0.5 A g−1). [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

186. Polarization‐Independent Indium Phosphide Nanowire Photodetectors

Author

Le Yu, Kai Qiu, Chennupati Jagadish, Ji Xiaoli, Qianjin Wang, Rong Zhang, Fang-Fang Ren, Jiandong Ye, Feng Yan, Nikita Gagrani, Mingcheng Luo, and Hark Hoe Tan

Subjects
chemistry.chemical_compound, Materials science, chemistry, business.industry, Indium phosphide, Nanowire, Optoelectronics, Photodetector, Polarization (electrochemistry), business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2020

Catalog

Books, media, physical & digital resources
See catalog results