المؤلفون: Zhang, Man-Na, Dong, Lei, Wang, Li-Feng, Huang, Qing-An

المساهمون: National Natural Science Foundation of China

المصدر: Microsystems & Nanoengineering ; volume 10, issue 1 ; ISSN 2055-7434

مصطلحات موضوعية: Electrical and Electronic Engineering, Industrial and Manufacturing Engineering, Condensed Matter Physics, Materials Science (miscellaneous), Atomic and Molecular Physics, and Optics

الوصف: Exceptional points (EPs) have recently emerged as a new method for engineering the response of open physical systems, that is, systems that interact with the environment. The systems at the EPs exhibit a strong response to a small perturbation. Here, we show a method by which the sensitivity of silicon resonant sensors can be enhanced when operated at EPs. In our experiments, we use a pair of mechanically coupled silicon micromechanical resonators constituting a parity–time (PT)-symmetric dimer. Small perturbations introduced on the mechanically coupled spring cause the frequency to split from the EPs into the PT-symmetric regime without broadening the two spectrum linewidths, and this frequency splitting scales with the square root of the perturbation strength. The overall signal-to-noise ratio is still greatly enhanced, although the measured noise spectral density of the EP sensing scheme has a slight increase comparable to the traditional counterpart. Our results pave the way for resonant sensors with ultrahigh sensitivity.

الإتاحة: https://doi.org/10.1038/s41378-023-00641-wTest
https://www.nature.com/articles/s41378-023-00641-w.pdfTest
https://www.nature.com/articles/s41378-023-00641-wTest

المؤلفون: Tang, Jian-Ming, Fan, Wan-Ting, Chu, Po-Yi, Wu, Dong-Lei, Cao, Feng-Di, Zhang, Ye

المصدر: Journal of Cluster Science ; ISSN 1040-7278 1572-8862

مصطلحات موضوعية: Condensed Matter Physics, General Materials Science, Biochemistry, General Chemistry

الإتاحة: https://doi.org/10.1007/s10876-024-02548-6Test

المؤلفون: Wang, Li, Wang, Chao, Zhang, Jing-Yi, Qiu, Jia-Cheng, Fu, Xu-Wang, Zhang, Zi-Rui, Feng, Jian-Min, Dong, Lei, Long, Cong-Lai, Li, De-Jun, Wang, Xiao-Wei, Zhang, Bao, Zhang, Jia-Feng, Zhao, Rui-Rui

المساهمون: National Natural Science Foundation of China

المصدر: Rare Metals ; ISSN 1001-0521 1867-7185

مصطلحات موضوعية: Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Condensed Matter Physics

الإتاحة: https://doi.org/10.1007/s12598-023-02572-xTest

المؤلفون: Zhao, Hongxia, Yang, Yong, Shu, Xin, qiao, Min, Dong, Lei, Ran, Qianping

المساهمون: National Natural Science Foundation of China, National Science Fund for Distinguished Young Scholars

المصدر: Journal of Molecular Liquids ; volume 398, page 124333 ; ISSN 0167-7322

مصطلحات موضوعية: Materials Chemistry, Physical and Theoretical Chemistry, Spectroscopy, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials

الإتاحة: https://doi.org/10.1016/j.molliq.2024.124333Test
https://api.elsevier.com/content/article/PII:S0167732224003891?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S0167732224003891?httpAccept=text/plainTest

المؤلفون: Wei, Qianhe, Li, Bincheng, Zhao, Binxing, Yang, Ping, Dong, Lei

المساهمون: National Key Research and Development Program of China, National Key Research and Development Program of China Stem Cell and Translational Research, National Natural Science Foundation of China, National Safety Academic Fund, NSAF Joint Fund

المصدر: Measurement ; volume 227, page 114259 ; ISSN 0263-2241

مصطلحات موضوعية: Applied Mathematics, Electrical and Electronic Engineering, Condensed Matter Physics, Instrumentation

الإتاحة: https://doi.org/10.1016/j.measurement.2024.114259Test
https://api.elsevier.com/content/article/PII:S026322412400143X?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S026322412400143X?httpAccept=text/plainTest

المؤلفون: Wu, Yuanlong, Dong, Lei, Ran, Qianping

المصدر: Applied Surface Science ; volume 649, page 159193 ; ISSN 0169-4332

مصطلحات موضوعية: Surfaces, Coatings and Films, Condensed Matter Physics, Surfaces and Interfaces, General Physics and Astronomy, General Chemistry

الإتاحة: https://doi.org/10.1016/j.apsusc.2023.159193Test
https://api.elsevier.com/content/article/PII:S0169433223028738?httpAccept=text/xmlTest
https://api.elsevier.com/content/article/PII:S0169433223028738?httpAccept=text/plainTest

المؤلفون: Dong, Lei, Choi, Kwing So, Wang, Yaxing

مصطلحات موضوعية: Condensed Matter Physics, Fluid Flow and Transfer Processes, Mechanics of Materials, Computational Mechanics, Mechanical Engineering

الوصف: Flow control of the tip vortices over a very low aspect-ratio wing was carried out using the dielectric-barrier-discharge plasma actuators. The results indicate a large change in the aerodynamic forces by plasma flow control, where the lift coefficient is increased by the blowing plasma actuator by 23% and is reduced by the suction plasma actuator by 30%. The change in the drag coefficient is less than 10%. The blowing plasma moves the tip vortex outboard away from the wing tip, increasing the streamwise vorticity as well as the turbulence intensities and the Reynolds stress. With the suction plasma, the tip vortex is shifted inboard closer to the wing tip. Co-flowing with the tip vortex, the blowing plasma increases the tip vortex circulation, while it is reduced by the counter-flowing suction plasma.

العلاقة: https://nottingham-repository.worktribe.com/output/8947693Test; Physics of Fluids; Volume 34; Issue 8; https://nottingham-repository.worktribe.com/file/8947693/1Test/Dong%20Et%20Al.%20Article%20File

الإتاحة: https://doi.org/10.1063/5.0101110Test
https://nottingham-repository.worktribe.com/file/8947693/1Test/Dong%20Et%20Al.%20Article%20File
https://nottingham-repository.worktribe.com/output/8947693Test

المؤلفون: Dong, Lei, Choi, Kwing-So, Mao, Xuerui, Wang, Yaxing

المساهمون: China Scholarship Council, Engineering and Physical Sciences Research Council

المصدر: Journal of Fluid Mechanics ; volume 943 ; ISSN 0022-1120 1469-7645

مصطلحات موضوعية: Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, Applied Mathematics

الوصف: The vortical structures over a thin rectangular wing with a very low aspect ratio of 0.277 were investigated in a wind tunnel at an effective Reynolds number of $3 \times 10^6$ . When applying pitch-up motion pivoted at mid-chord, the maximum lift angle was increased with an increase in the pitch rate, but the maximum lift coefficient was reduced. The pitching motion also caused delay in the vortical development over the wing, which was increased with an increase in the pitch rate. The delay in the leading-edge vortex development due to the pitching motion was nearly identical to that in the tip vortex development, indicating that the dynamics of the leading-edge vortex was strongly influenced by the tip vortex. This was confirmed by particle image velocimetry measurements, which demonstrated that the tip vortex over a very low aspect-ratio wing induced strong downwash to influence the development of the leading-edge vortex during the pitching motion, which led to a delay in flow separation.

الإتاحة: https://doi.org/10.1017/jfm.2022.451Test
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022112022004517Test

المؤلفون: Shang, Zhijin, Hongpeng, Wu, Shangzhi, Li, Wang, Gang, Sampaolo, Angelo, Patimisco, Pietro, Spagnolo, Vincenzo, Dong, Lei

المصدر: Sensors and Actuators B: Chemical. 390:133937

مصطلحات موضوعية: Chemical warfare agent, Trace gas sensor, Materials Chemistry, Metals and Alloys, Chemical warfare agent, Photoacoustic spectroscopy, Quartz tuning fork, Trace gas sensor, Electrical and Electronic Engineering, Quartz tuning fork, Condensed Matter Physics, Instrumentation, Photoacoustic spectroscopy, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0761064bbf22547e56c41f5d79802decTest
https://doi.org/10.1016/j.snb.2023.133937Test

المؤلفون: Shen, Jin-Ke, Wu, Nai-Teng, Wang, Li-Yuan, Jiang, Gang, Guo, Dong-Lei, Li, Jin, Liu, Gui-Long, Mi, Hong-Yu, Pang, Huan, Liu, Xian-Ming

المساهمون: Natural Science Foundations of China, Natural Science Foundations of Henan Province, Program for Science & Technology Innovation Talents in Universities of Henan Province, Key Science and Technology Program of Henan Province

المصدر: Rare Metals ; volume 43, issue 1, page 76-86 ; ISSN 1001-0521 1867-7185

مصطلحات موضوعية: Materials Chemistry, Metals and Alloys, Physical and Theoretical Chemistry, Condensed Matter Physics

الإتاحة: https://doi.org/10.1007/s12598-023-02408-8Test