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Acoustic fault signal extraction via the line-defect phononic crystals

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 10-10 doi: 10.1007/s11465-021-0666-y

Abstract: In this paper, 2D line-defect phononic crystals (PCs) consisting of periodic acrylic tubes with slit

Keywords： phononic crystals     line-defect     fault signal extraction     acoustic enhancement    

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Recent Developments in Functional Crystals in China Review

Jiyang Wang, Haohai Yu, Yicheng Wu, Robert Boughton

Engineering 2015, Volume 1, Issue 2,   Pages 192-210 doi: 10.15302/J-ENG-2015053

Abstract:

Functional crystals are the basic materials for the development of modern science and technology andIn this paper, we review functional crystals in China, including research history, significant achievements

Keywords： functional materials     laser crystals     nonlinear optical crystals     scintillation crystals     relaxor ferroelectriccrystals     semiconductors    

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Existence of complete band gaps in 2D steel-water phononic crystal with square lattice

Cunfu HE, Huanyu ZHAO, Ruiju WEI, Bin WU

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 450-454 doi: 10.1007/s11465-010-0105-y

Abstract: theoretically and experimentally studies the existence of complete band gaps in two-dimensional (2D) phononicThe band structure of phononic crystal is calculated by a plane wave expansion (PWE) method.

Keywords： phononic crystal     plane wave expansion (PWE) method     experimental study    

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Synthesis of crystals and particles by crystallization and polymerization in droplet-based microfluidic

Jingtao WANG, Jin ZHANG, Junjie HAN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 1,   Pages 26-36 doi: 10.1007/s11705-009-0292-4

Abstract: and polymerization assisted by droplet-based microfluidics to synthesize micro-particles and micro-crystalsdroplets are ideal microreactors to be manipulated in the channels to synthesize the nanocrystals, protein crystalsThe generated monodisperse particles or crystals are to meet different technical demands in many fieldsThe nucleation kinetics of some crystals like KNO was investigated in different microfluidic devices.

Keywords： core-shell     monodisperse     nucleation     Microfluidic     different technical    

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Filtration ability of hollow fiber membrane for production of magnesium ammonium phosphate crystals by

H. Watamura, H. Marukawa, I. Hirasawa

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 55-59 doi: 10.1007/s11705-013-1312-y

Abstract: Phosphorus recovery process by crystallization has a problem that it produces a large amount of fine crystalsMAP crystals were obtained by batch reaction crystallization and the filtration characteristics wereof large crystals decreases exponentially at less suspension density than of small crystals does.Also, increases as the ratio of the fractured crystals increases.

Keywords： membrane separation     crystallization     MAP    

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Control of the agglomeration of crystals in the reactive crystallization of 5-(difluoromethoxy)-2-mercapto

Yongli WANG, Shuyuan MA, Xiaodong Lü, Chuang XIE

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 423-431 doi: 10.1007/s11705-012-1211-7

Abstract: 5-(Difluoromethoxy)-2-mercapto-1 -benzimidazole (DMB) was precipitated by adding acetic acid to the DMB sodium salt solution. The spherical agglomeration of DMB during the reactive crystallization in a batch crystallizer was monitored by real-time Particle Video Microscope (PVM). We found that the low feeding rate of acetic acid, high crystallization temperature, low agitation rate or adding seed crystal can facilitate the formation of spherical agglomerates. By using a simple model, the mean crystal agglomerate size of DMB thus predicted is generally in agreement with the experimental data. In addition, the crystallization process of DMB was optimized by a new control strategy of supersaturation to avoid disadvantages brought by agglomeration.

Keywords： 5-(difluoromethoxy)-2-mercapto-1H-benzimidazole (DMB)     reactive crystallization     agglomeration     feeding rate     crystallization temperature     agitation rate    

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Optoelectronic Crystals, All-Solid-State Lasers and their Applications——An Important Course of Optoelectronics

Xu Zuyan

Strategic Study of CAE 1999, Volume 1, Issue 2,   Pages 72-77

Abstract: In the 1990s, great advances in optoelectronic crystals and breakthroughs in laser diode technology have

Keywords： optoelectronic crystals     all-solid-state lasers     material processing     optical storage     laser displays     laser    

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Realization of energy-saving glass using photonic crystals

Yen-Hsiang CHEN, Li-Hung LIAO, Yu-Bin CHEN

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 178-184 doi: 10.1007/s11708-018-0523-9

Abstract: The glass is composed of a SiO substrate and two layers of three-dimensional photonic crystals.

Keywords： energy-saving glass     photonic crystals     polystyrene spheres     self-assembly    

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Reactivity of triacetone triperoxide and diacetone diperoxide: Insights from nuclear Fukui function

Matthew J. SWADLEY, Panpan ZHOU, Tonglei LI

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 1,   Pages 114-123 doi: 10.1007/s11705-015-1507-5

Abstract: To explain this reactivity difference, we analyzed the electronic structures and properties of the crystalscalculations provided valuable insight into the decomposition sensitivity difference between TATP and DADP crystals

Keywords： nuclear Fukui function     electronic perturbation     Hellmann-Feynman force     organic crystals     unimolecular decomposition    

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High-Efficiency Circularly Polarized Phased Array Based on 5 μm-Thick Nematic Liquid Crystals: Design Article

Xin Yu Wu,Fengshuo Wan,Hongyuan Feng,Shichao Jin,Chong Guo,Yu Wei,Dunge Liu,Yuqian Yang,Longzhu Cai,Zhi Hao Jiang,Wei Hong

Engineering 2024, Volume 32, Issue 1,   Pages 70-82 doi: 10.1016/j.eng.2023.08.013

Abstract:

This paper presents a systematic investigation and demonstration of a K-band circularly polarized liquid-crystal-based phased array (LCPA), including the design, over-the-air (OTA) in-array calibration, and experimental validation. The LCPA contains 16 phase-shifting radiating channels, each consisting of a circularly polarized stacked patch antenna and a liquid-crystal-based phase shifter (LCPS) based on a loaded differential line structure. Thanks to its slow-wave properties, the LCPS exhibits a maximum phase-shifting range of more than 360° with a figure of merit of 78.3°·dB−1 based on a liquid crystal layer with a thickness of only 5 μm. Furthermore, an automatic OTA calibration based on a state ergodic method is proposed, which enables the extraction of the phase–voltage curve of every individual LCPA channel. The proposed LCPA is manufactured and characterized with a total profile of only 1.76 mm, experimentally demonstrating a scanned circularly polarized beam from −40° to +40° with a measured peak gain of 12.5 dBic and a scanning loss of less than 2.5 dB. The bandwidth of the LCPA, which satisfies the requirements of port reflection (|S11|) < −15 dB, an axial ratio (AR) < 3 dB, beam squinting < 3°, and a gain variation < 2.2 dB, spans from 25.5 to 26.0 GHz. The total efficiency is about 34%, which represents a new state of the art. The use of the demonstrated low-profile LCPA to support circularly polarized scanning beams, along with the systematic design and calibration methodology, holds potential promise for a variety of millimeter-wave applications.

Keywords： Circularly polarized     Liquid crystal     Liquid-crystal-based phased array (LCPA)     Phase shifter     Over-the-air (OTA) calibration    

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and crack-free surface fabrication techniques for ultra-precision fly cutting of large-aperture KDP crystals

F. H. ZHANG, S. F. WANG, C. H. AN, J. WANG, Q. XU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2,   Pages 193-202 doi: 10.1007/s11465-017-0448-8

Abstract:

Large-aperture potassium dihydrogen phosphate (KDP) crystals are widely used in the laser path ofThe most common method of manufacturing half-meter KDP crystals is ultra-precision fly cutting.When processing KDP crystals by ultra-precision fly cutting, the dynamic characteristics of the fly cuttingThese machining errors should be suppressed effectively to guarantee that KDP crystals meet the full-bandIn this study, the anisotropic machinability of KDP crystals and the causes of typical surface errors

Keywords： ultra-precision fly cutting     large-aperture KDP crystals     spatial frequency     processing error    

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Title Author Date Type Operation

Acoustic fault signal extraction via the line-defect phononic crystals

Journal Article

Recent Developments in Functional Crystals in China

Jiyang Wang, Haohai Yu, Yicheng Wu, Robert Boughton

Journal Article

Existence of complete band gaps in 2D steel-water phononic crystal with square lattice

Cunfu HE, Huanyu ZHAO, Ruiju WEI, Bin WU

Journal Article

Synthesis of crystals and particles by crystallization and polymerization in droplet-based microfluidic

Jingtao WANG, Jin ZHANG, Junjie HAN,

Journal Article

Filtration ability of hollow fiber membrane for production of magnesium ammonium phosphate crystals by

H. Watamura, H. Marukawa, I. Hirasawa

Journal Article

Control of the agglomeration of crystals in the reactive crystallization of 5-(difluoromethoxy)-2-mercapto

Yongli WANG, Shuyuan MA, Xiaodong Lü, Chuang XIE

Journal Article

Optoelectronic Crystals, All-Solid-State Lasers and their Applications——An Important Course of Optoelectronics

Xu Zuyan

Journal Article

Realization of energy-saving glass using photonic crystals

Yen-Hsiang CHEN, Li-Hung LIAO, Yu-Bin CHEN

Journal Article

Han Huang: Deformation and Removal of Semiconductor and Laser Crystals at Extremely Small Scales（2019.10.10

23 Apr 2021

Conference Videos

Reactivity of triacetone triperoxide and diacetone diperoxide: Insights from nuclear Fukui function

Matthew J. SWADLEY, Panpan ZHOU, Tonglei LI

Journal Article

High-Efficiency Circularly Polarized Phased Array Based on 5 μm-Thick Nematic Liquid Crystals: Design

Xin Yu Wu,Fengshuo Wan,Hongyuan Feng,Shichao Jin,Chong Guo,Yu Wei,Dunge Liu,Yuqian Yang,Longzhu Cai,Zhi Hao Jiang,Wei Hong

Journal Article

and crack-free surface fabrication techniques for ultra-precision fly cutting of large-aperture KDP crystals

F. H. ZHANG, S. F. WANG, C. H. AN, J. WANG, Q. XU

Journal Article