|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Complex variable method for an anti-plane elliptical cavity of one-dimensional hexagonal piezoelectric quasicrystals显示文摘Based on the fundamental equations of piezoelasticity of quasicrystal media, using the symmetry operations of point groups, the linear piezoelasticity behavior of one-dimensional(1D)hexagonal quasicrystals is investigated and the piezoelasticity problem of 1D hexagonal quasicrystals is decomposed into two uncoupled problems, i.e., the classical plane elasticity problem of conventional hexagonal crystals and the phonon–phason-electric coupling elasticity problem of1 D hexagonal quasicrystals.The final governing equations are derived for the phonon–phasonelectric coupling anti-plane elasticity of 1D hexagonal quasicrystals.The complex variable method for an anti-plane elliptical cavity in 1D hexagonal piezoelectric quasicrystals is proposed and the exact solutions of complex potential functions, the stresses and displacements of the phonon and the phason fields, the electric displacements and the electric potential are obtained explicitly.Reducing the cavity into a crack, the explicit solutions in closed forms of electro–elastic fields,the field intensity factors and the energy release rate near the crack tip are derived. | Yu Jing Guo Junhong Xing Yongming | 2015 | Chinese Journal of Aeronautics2015，28，4： | 13 |
| 2 | General solutions of plane problem in one-dimensional quasicrystal piezoelectric materials and its application on fracture mechanics显示文摘Based on the fundamental equations of piezoelasticity of quasicrystals(QCs),with the symmetry operations of point groups, the plane piezoelasticity theory of onedimensional(1D) QCs with all point groups is investigated systematically. The governing equations of the piezoelasticity problem for 1D QCs including monoclinic QCs,orthorhombic QCs, tetragonal QCs, and hexagonal QCs are deduced rigorously. The general solutions of the piezoelasticity problem for these QCs are derived by the operator method and the complex variable function method. As an application, an antiplane crack problem is further considered by the semi-inverse method, and the closed-form solutions of the phonon, phason, and electric fields near the crack tip are obtained. The path-independent integral derived from the conservation integral equals the energy release rate. | Jing YU Junhong GUO Ernian PAN Yongming XING | 2015 | Applied Mathematics and Mechanics(English Edition)2015，36，6： | 10 |
| 3 | A Self-Powered Breath Analyzer Based on PANI/PVDF Piezo-Gas-Sensing Arrays for Potential Diagnostics Application显示文摘The increasing morbidity of internal diseases poses serious threats to human health and quality of life.Exhaled breath analysis is a noninvasive and convenient diagnostic method to improve the cure rate of patients. In this study, a self-powered breath analyzer based on polyaniline/polyvinylidene fluoride(PANI/PVDF) piezogas-sensing arrays has been developed for potential detection of several internal diseases. The device works by converting exhaled breath energy into piezoelectric gassensing signals without any external power sources. The five sensing units in the device have different sensitivities to various gas markers with concentrations ranging from 0 to 600 ppm. The working principle can be attributed to the coupling of the in-pipe gas-flow-induced piezoelectric effect of PVDF and gas-sensing properties of PANI electrodes. In addition, the device demonstrates its use as an ethanol analyzer to roughly mimic fatty liver diagnosis.This new approach can be applied to fabricating new exhaled breath analyzers and promoting the development of self-powered systems. | Yongming Fu Haoxuan He Tianming Zhao Yitong Dai Wuxiao Han Jie Ma Lili Xing Yan Zhang Xinyu Xue | 2018 | Nano-Micro Letters2018，10，4： | 4 |
| 4 | Mapping Microscale Strain Fields Around a Crack Tip in Molybdenum Via Geometric Phase Analysis and Digital Image Correlation显示文摘Uniaxial tension tests were conducted on single-edge-notched tensile specimens of pure molybdenum with a mesh grid pattern in front of the notch. A series of images of crack initialization and propagation with a distorted mesh grid pattern were obtained by means of in situ scanning electron microscopy. Strain fields around the crack tip were mapped successively using geometric phase analysis and digital image correlation techniques, and then compared with the predictions obtained through linear elastic fracture mechanics(LEFM). The comparison shows that the measured strain distribution ahead of the crack tip is consistent with the LEFM predictions of up to 25 μm from the crack tip. | Chunwang Zhao Wencai Li Jijun Li Yongxiang Li Quanlong Liu Lifu Wang Qingyu Hou Yongming Xing | 2018 | Acta Mechanica Solida Sinica2018，31，3： | 3 |
| 5 | Quantitative analysis of nanoscale deformation fields of a crack-tip in single-crystal silicon显示文摘A mode II crack in single-crystal silicon was investigated experimentally using high-resolution transmission electron microscopy.Geometric phase analysis and numerical moiré method were employed to map the deformation fields of the crack-tip area.The normal strain field maps of the crack-tip area indeed showed the deformation occurs primarily in the vicinity of the dislocations and the normal strains are near zero in the crack-tip area.The shear strain field map shows that the relatively large shear strain is in the crack-tip area.The experimental results were compared with the predictions of linear elastic fracture mechanics.The comparison shows that measured strain distribution ahead of the crack-tip agrees with the predictions of linear elastic fracture mechanics up to 1 nm from the crack-tip. | ZHAO ChunWang XING YongMing | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，6： | 2 |
| 6 | Integrated supersonic wind tunnel nozzle显示文摘In supersonic wind tunnels, the airflow at the exit of a convergent-divergent nozzle is affected by the connection between the nozzle and test section, because the connection is a source of disturbance for supersonic flow and the source of disturbance generated by this disturbance propagates downstream. In order to avoid the disturbance, the test can only be carried out in the rhombus area. However, for the supersonic nozzle, the rhombus region is small, limiting the size and attitude angle of the test model. An integrated supersonic nozzle is a nozzle and a test section as a whole, which is designed to weaken or eliminate the disturbance. The inviscid contour of the supersonic nozzle is based on the method of characteristics. A new curve is formed by the smooth connection between the inviscid contour and test section, and the boundary layer is corrected for the overall curve. Integrated supersonic nozzles with Mach number 1.5 and 2 are designed, which are based on this method. The flow field is validated by numerical and experimental results. The results of the study highlight the importance of the connection about the nozzle outlet and test section. They clearly show that the wave system does not exist at the exit of the supersonic nozzle, and the flow field is uniform throughout the test section. | Junmou SHEN Jingang DONG Ruiqu LI Jiang ZHANG Xing CHEN Yongming QIN Handong MA | 2019 | Chinese Journal of Aeronautics2019，32，11： | 1 |
| 7 | Bending Analysis of Functionally Graded One-Dimensional Hexagonal Piezoelectric Quasicrystal Multilayered Simply Supported Nanoplates Based on Nonlocal Strain Gradient Theory显示文摘In this study,the nonlocal strain gradient theory is adopted to investigate the static bending deformation of a functionally graded(FG)multilayered nanoplate made of onedimensional hexagonal piezoelectric quasicrystal(PQC)materials subjected to mechanical and electrical surface loadings.The FG materials are assumed to be exponential distribution along the thickness direction.Exact closed-form solutions of an FG PQC nanoplate including nonlocality and strain gradient micro-size dependency are derived by utilizing the pseudo-Stroh formalism.The propagator matrix method is further used to solve the multilayered case by assuming that the layer interfaces are perfectly contacted.Numerical examples for two FG sandwich nanoplates made of piezoelectric crystals and PQC are provided to show the influences of nonlocal parameter,strain gradient parameter,exponential factor,length-to-width ratio,loading form,and stacking sequence on the static deformation of two FG sandwich nanoplates,which play an important role in designing new smart composite structures in engineering. | Li Zhang Junhong Guo Yongming Xing | 2021 | Acta Mechanica Solida Sinica2021，34，2： | 1 |
| 8 | Microstructure and mechanical properties of a large billet of spray formed Al–Zn–Mg–Cu alloy with high Zn content显示文摘 | Pucun Bai Xiaohu Hou Xiuyun Zhang Chunwang Zhao Yongming Xing | 2009 | Materials Science & Engineering A2009，，1： | 1 |
| 9 | Micromechanical characteristics of the asphalt mixture in bending condition显示文摘The characteristics of asphalt mixtures are associated with the key features of the mixed material when it is not damaged.Two-dimensional(2D) microstructure images of asphalt mixture bending beam specimen were captured by a CCD camera.After image processing,such as noise elimination,boundary identification,image binarization and vectorization,the images were imported into finite element(FE) software in order to set up the micromechanical finite element(FE) model.The simulation results show that the displacement contours spectrum is not a smooth curve since the mixed material is heterogeneous.Also,the largest strain value exists at the bottom of the specimen between two coarse aggregates,and it is the point where the fracture starts.The stress values of aggregates are larger than those of the asphalt matrix.Different from the strain of asphalt matrix,the strain of aggregates is close to zero because the aggregates have higher capability to resist self-deformation.The difference in deformation between aggregate and asphalt matrix can lead to an interface crack as a final result.All these results can be improved by three-point bending test of asphalt mixture beam. | CUI YaNan XING YongMing NI WenChen | 2013 | Science China(Technological Sciences)2013，56，2： | 1 |
| 10 | Experimental study about nano-deformation field near quasi-cleavage crack tip显示文摘 | Yongming Xing Fulong Dai Wei Yang | 2000 | Science in China Series A: Mathematics2000，，9： | 1 |
| 11 | Experimental study about nano-deformation field near quasi-cleavage crack tip显示文摘 | Yongming Xing Fulong Dai Wei Yang | 2000 | Science in China Series A: Mathematics2000，，9： | 1 |
| 12 | Survey on autonomous task scheduling technology for Earth observation satellites显示文摘How to make use of limited onboard resources for complex and heavy space tasks has attracted much attention.With the continuous improvement on satellite payload capacity and the increasing complexity of observation requirements,the importance of satellite autonomous task scheduling research has gradually increased.This article first gives the problem description and mathematical model for the satellite autonomous task scheduling and then follows the steps of'satellite autonomous task scheduling,centralized autonomous collaborative task scheduling architecture,distributed autonomous collaborative task scheduling architecture,solution algorithm'.Finally,facing the complex and changeable environment situation,this article proposes the future direction of satellite autonomous task scheduling. | WU Jian CHEN Yuning HE Yongming XING Lining HU Yangrui | 2022 | Journal of Systems Engineering and Electronics2022，33，6： | 0 |
| 13 | TaANR1-TaMADS25 module regulates lignin biosynthesis and root development in wheat(Triticum aestivum L.)显示文摘Common wheat is a staple food for 35%of the global population,therefore increasing wheat yield in an ever-changing environment is essential for food security in the present day(Peng et al.,2011).Root system is responsible for water and nutrient acquisition,thus crucial for competitive fitness and crop yield in challenging environments(Karlova et al.,2021;Liu et al.,2022).Over the past decades,extensive research has focused on identifying genes accountable for root growth and development in plants(Rogers and Benfey,2015).However,only a limited number of genes have been cloned in wheat(Li et al.,2021). | Weiya Xu Yongming Chen Bin Liu Qiuyuan Li Yilan Zhou Xuanshuang Li Weilong Guo Zhaorong Hu Zhenshan Liu Mingming Xin Yingyin Yao Mingshan You Huiru Peng Zhongfu Ni Jiewen Xing | 2023 | Journal of Genetics and Genomics2023，50，11： | 0 |
| 14 | Optimization of the methane production in batch anaerobic digestion of maize straw by adjustment of total solid and substrate-to-inoculum ratio based on kinetics显示文摘Anaerobic digestion(AD)operating under conditions of organic overload stress typically exacerbates the potential for process instability,thereby resulting in significant economic and ecological ramifications.In this investigation,an augmented substrate-to-inoculum ratio(S/I)along with varying total solid content(TS)levels was employed to replicate diverse organic loadings,utilizing maize straw and cattle manure.The findings reveal that a moderate augmentation in S/I and TS proves advantageous in augmenting methane yield,while an excessive substrate loading diminishes methane yield,hampers the kinetics of methane production,and even induces severe process instability.Kinetic study also displayed the variation of the model parameters for the first-order model,the modified Gompertze model,and the transfer function model.Both the modified Gompertze model and transfer function model exhibited the same environmental stress trend.Thus,both the increase in particulate content and the increase in S/I had a substantial effect on the substrate conversion rate to methane.Microbial analysis demonstrates the dominant influence of Firmicutes and Methanosarcina under different organic loading stresses.From both a kinetic and a microbiological point of view,this work provides novel insights into the fundamental processes that regulate anaerobic digestion(AD)under varying loading stress.Furthermore,it has significant implications for improving the operating efficiency of AD,which is a significant benefit. | Feng Zhen Tao Xing Lianhua Li Yongming Sun Hongqiong Zhang | 2024 | International Journal of Agricultural and Biological Engineering2024，17，1： | 0 |
| 15 | A bacterial symbiont in the gill of the marine scallop Argopecten irradians irradians metabolizes dimethylsulfoniopropionate显示文摘Microbial lysis of dimethylsulfoniopropionate(DMSP)is a key step in marine organic sulfur cycling and has been recently demonstrated to play an important role in mediating interactions between bacteria,algae,and zooplankton.To date,microbes that have been found to lyse DMSP are largely confined to free‐living and surface‐attached bacteria.In this study,we report for the first time that a symbiont(termed“Rhodobiaceae bacterium HWgs001”)in the gill of the marine scallop Argopecten irradians irradians can lyse and metabolize DMSP.Analysis of 16S rRNA gene sequences suggested that HWgs001 accounted for up to 93%of the gill microbiota.Microscopic observations suggested that HWgs001 lived within the gill tissue.Unlike symbionts of other bivalves,HWgs001 belongs to Alphaproteobacteria rather than Gammaproteobacteria,and no genes for carbon fixation were identified in its small genome.Moreover,HWgs001 was found to possess a dddP gene,responsible for the lysis of DMSP to acrylate.The enzymatic activity of dddP was confirmed using the heterologous expression,and in situ transcription of the gene in scallop gill tissues was demonstrated using reverse‐transcription PCR.Together,these results revealed a taxonomically and functionally unique symbiont,which represents the first‐documented DMSP‐metabolizing symbiont likely to play significant roles in coastal marine ecosystems. | Yi Shu Yongming Wang Zhongcheng Wei Ning Gao Shuyan Wang Chun-Yang Li Qiang Xing Xiaoli Hu Xiao-Hua Zhang Yu-Zhong Zhang Weipeng Zhang Zhenmin Bao Wei Ding | 2023 | mLife2023，2，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员