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| 1 | A Nonresonant Hybridized Electromagnetic-Triboelectric Nanogenerator for Irregular and Ultralow Frequency Blue Energy Harvesting显示文摘As a promising renewable energy source,it is a challenging task to obtain blue energy,which is irregular and has an ultralow frequency,due to the limitation of technology.Herein,a nonresonant hybridized electromagnetic-triboelectric nanogenerator was presented to efficiently obtain the ultralow frequency energy.The instrument adopted the flexible pendulum structure with a precise design and combined the working principle of electromagnetism and triboelectricity to realize the all-directional vibration energy acquisition successfully.The results confirmed that the triboelectric nanogenerator(TENG)had the potential to deliver the maximum power point of about 470μW while the electromagnetic nanogenerator(EMG)can provide 523 mW at most.The conversion efficiency of energy of the system reached 48.48%,which exhibited a remarkable improvement by about 2.96 times,due to the elastic buffering effect of the TENG with the double helix structure.Furthermore,its ability to collect low frequency wave energy was successfully proven by a buoy in Jialing River.This woke provides an effective candidate to harvest irregular and ultralow frequency blue energy on a large scale. | Weibo Xie Lingxiao Gao Lingke Wu Xin Chen Fayang Wang Daqiao Tong Jian Zhang Jianyu Lan Xiaobin He Xiaojing Mu Ya Yang | 2021 | Research2021，，1： | 4 |
| 2 | Instability waves and low-frequency noise radiation in the subsonic chevron jet显示文摘Spatial instability waves associated with lowfrequency noise radiation at shallow polar angles in the chevron jet are investigated and are compared to the round counterpart. The Reynolds-averaged Navier–Stokes equations are solved to obtain the mean flow fields, which serve as the baseflow for linear stability analysis. The chevron jet has more complicated instability waves than the round jet, where three types of instability modes are identified in the vicinity of the nozzle, corresponding to radial shear, azimuthal shear,and their integrated effect of the baseflow, respectively. The most unstable frequency of all chevron modes and round modes in both jets decrease as the axial location moves downstream. Besides, the azimuthal shear effect related modes are more unstable than radial shear effect related modes at low frequencies. Compared to a round jet, a chevron jet reduces the growth rate of the most unstable modes at downstream locations. Moreover, linearized Euler equations are employed to obtain the beam pattern of pressure generated by spatially evolving instability waves at a dominant low frequency St = 0.3, and the acoustic efficiencies of these linear wavepackets are evaluated for both jets. It is found that the acoustic efficiency of linear wavepacket is able to be reduced greatly in the chevron jet, compared to the round jet. | Lingke Ran Chuangchao Ye Zhenhua Wan Haihua Yang Dejun Sun | 2018 | Acta Mechanica Sinica2018，34，3： | 4 |
| 3 | Coherent structures and wavepackets in subsonic transitional turbulent jets显示文摘A large eddy simulation(LES) is performed for two subsonic jets with a Reynolds number of Re = 105,which have different core temperatures, i.e., the cold and hot jet. The far-field overall sound pressure levels(OASPL)and noise spectra are well validated against previous experimental results. It is found that the OASPL is raised by heating at shallow angles. The most energetic coherent structures are extracted with specified frequencies using the filter based on the frequency domain variant of the snapshot method of proper orthogonal decomposition(POD). The m = 0, 1 modes have high coherence of near-field pressure for both jets, while the coherence of m = 0 modes is enhanced greatly by heating. Based on the coherent structures, spatial wavepackets are educed and the characteristics of growth, saturation and decay are analyzed and compared between the two jets in detail. The results show that heating would enhance the linear growth rate for high frequency components, and nonlinear growth rates for low frequency components in general, which are responsible for higher OASPL in the hot jet. The far-field sound generated by wavepackets is computed using the Kirchhoff extrapolation,which matches well with that of LES at shallow angles.This indicates that the wavepackets associated with coherent structures are dominant sound sources in forced transitional turbulent jets. Additionally, the present POD method is proven to be a robust tool to extract the salient features of the wavepackets in turbulent flows. | Haihua Yang Xingchen Zhang Lingke Ran Dejun Sun Zhenhua Wan | 2017 | Acta Mechanica Sinica2017，33，1： | 4 |
| 4 | ThezeroGdivisorsandtheunitgroupofQuaternionAlgebraZn 显示文摘 | WEIYJ TANGG H LINGK | 2009 | GuanGgxiSciences2009，16，2： | 1 |
| 5 | Health risk evaluation of pesticide contamination in drinking water显示文摘 | Lingk W | 1991 | Gesunde Pflangen1991，43，5： | 1 |
| 6 | Enhanced Detection of Thromboemboli With the Use of Targeted Microbubbles显示文摘 | Matthew J. Martin Emma M.L. Chung Alison H. Goodall Alberto Della Martina Kumar V. Ramnarine Lingke Fan Sarah V. Hainsworth A Ross Naylor David H. Evans | 2007 | Stroke2007，，10： | 1 |
| 7 | Electroplated Damascene Copper:Process Influences on Re- crystalliiation and Texture 显示文摘 | Gross M E Dress R Lingk C Brown W L Evans-lutterodt K Barr D Golovin D Ritidorf T Turner J Graham L | 1999 | Materials Research Society1999，564，： | 1 |
| 8 | Evaluation of a system for monito- ring rumination in heifers and calves显示文摘 | BURFEIND O SCHIRMANN K VON KEYSER- LINGK M A | 2011 | J Dairy Sci2011，94，1： | 1 |
| 9 | Increased cyclic adenosine monophosphate levels block progression but not initiation of human T cell proliferation显示文摘 | Lingk D S Chan M A Gelfand E W | 1990 | Immunol1990，145，： | 1 |
| 10 | Kinetic study of thermophihc anaerobic digestion of solid wastes from potato processing 显示文摘 | Lingk B | 2006 | Biomass and Bioenergy2006，30，： | 1 |
| 11 | Photosensitized degradation of bisphenol A by dissolved organic matter 显示文摘 | Chin Yu-ping Miller P L Zeng Lingke | 2004 | Environ Sci Technol2004，38，： | 1 |
| 12 | A theory and empirical analysis of the decision to locate on a university research park 显示文摘 | LEYDEN D P LINGK A N SIEGDL D S | 2008 | IEEE Transactions on Engineering Management2008，55，1： | 1 |
| 13 | Preparation of TiO2 photocatalytic coatings显示文摘 | Wang Hui Zeng Lingke Huang Langhuan | 2005 | Journal of South China University of Technology:Natural Science Edition2005，33，3： | 1 |
| 14 | Preparation of TiO2 photocatalytic coatings显示文摘 | Wang Hui Zeng Lingke Huang Langhuan | 2005 | Journal of South China University of Technology: Natural Science Edition2005，33，3： | 1 |
| 15 | Electroplated damascene copper : process influences on re-crystalliiation and texture显示文摘 | Gross M E Dress R Lingk C | 1999 | Materials Research Society1999，564，： | 1 |
| 16 | Theaflavins attenuatehepatic lipid accumulation through activating AMPK in human HepG2 cells显示文摘 | LinCL HuangHC LingK | 2007 | JLipidRes2007，48，： | 1 |
| 17 | 显示文摘 | Chai hui Zeng lingke Liu pingan | 2007 | Journal of the Chi- nese Ceramic Society2007，，： | 1 |
| 18 | Acolorimetricmethodforthemolecularweightdeterminationofpolyethylenegly-colusinggoldnanoparticles 显示文摘 | LingK JiangH ZhangQ | 2013 | NanoscaleResearchLetters2013，8，1： | 1 |
| 19 | Preparation of TiO2 photocatalytic coatings显示文摘 | Wang Hu Zeng Lingke Huang Langhuan | 2005 | Journal of South China University of Technology2005，33，3： | 1 |
| 20 | Hydrothermal synthesis of xonotlite fibers and investigatinn on their thermal property显示文摘 | Liu Fei Zeng Lingke Cao Jianxin et d | 2010 | Advanced Materials Research2010，，105106： | 1 |
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