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| 1 | Mechanical properties of gangue-containing aluminosilicate based cementitious materials显示文摘High performance aluminosilicate based cementitious materials were produced using calcined gangue as one of the majorraw materials. The gangue was calcined at 500°C. The main constituent was calcined gangue, fly ash and slag, while alkali-silicatesolutions were used as the diagenetic agent. The structure of gangue-containing aluminosilicate based cementitious materials wasstudied by the methods of IR, NMR and SEM. The results show that the mechanical properties are affected by the mass ratio betweenthe gangue, slag and fly ash, the kind of activator and additional salt. For 28-day curing time, the compressive strength of the samplewith a mass proportion of 2:1:1 (gangue: slag: fly ash) is 58.9 MPa, while the compressive strength of the sample containing 80wt%gangue can still be up to 52.3 MPa. The larger K+ favors the formation of large silicate oligomers with which Al(OH)4? prefers to bind.Therefore, in Na-K compounding activator solutions more oligomers exist which result in a stronger compressive strength of alumino-silicate-based cementitious materials than in the case of Na-containing activator. The reasons for this were found through IR and NMRanalysis. Glauber’s salt reduces the 3-day compressive strength of the paste, but increases its 7-day and 28-day compressive strengths. | Huajian Li Henghu Sun Xuejun Xiao Hongxia Chen | 2006 | Journal of University of Science and Technology Beijing2006，13，2： | 14 |
| 2 | m^6A Regulates Neurogenesis and Neuronal Development by Modulating Histone Methyltransferase Ezh2显示文摘N6-methyladenosine (m6A),catalyzed by the methyltransferase complex consisting of Mettl3 and Mettl14,is the most abundant RNA modification in mRNAs and participates in diverse biological processes. However,the roles and precise mechanisms of m6A modification in regulating neuronal development and adult neurogenesis remain unclear. Here,we examined the function of Mettl3,the key component of the complex,in neuronal development and adult neurogenesis of mice. We found that the depletion of Mettl3 significantly reduced m6A levels in adult neural stem cells (aNSCs) and inhibited the proliferation of aNSCs. Mettl3 depletion not only inhibited neu-ronal development and skewed the differentiation of aNSCs more toward glial lineage,but also affected the morphological maturation of newborn neurons in the adult brain. m6A immunoprecip-itation combined with deep sequencing (MeRIP-seq) revealed that m6A was predominantly enriched in transcripts related to neurogenesis and neuronal development. Mechanistically,m6A was present on the transcripts of histone methyltransferase Ezh2,and its reduction upon Mettl3 knockdown decreased both Ezh2 protein expression and consequent H3K27me3 levels. The defects of neurogenesis and neuronal development induced by Mettl3 depletion could be rescued by Ezh2 overexpression. Collectively,our results uncover a crosstalk between RNA and histone modifica-tions and indicate that Mettl3-mediated m6A modification plays an important role in regulating neurogenesis and neuronal development through modulating Ezh2. | Junchen Chen Yi-Chang Zhang Chunmin Huang Hui Shen Baofa Sun Xuejun Cheng Yu-Jie Zhang Yun-Gui Yang Qiang Shu Ying Yang Xuekun Li | 2019 | Genomics, Proteomics & Bioinformatics2019，17，2： | 12 |
| 3 | Distribution and transportation of mercury from glacier to lake in the Qiangyong Glacier Basin, southern Tibetan Plateau, China显示文摘The Tibetan Plateau is home to the largest aggregate of glaciers outside the Polar Regions and is a source of fresh water to 1.4 billion people. Yet little is known about the transportation and cycling of Hg in high-elevation glacier basins on Tibetan Plateau. In this study, surface snow,glacier melting stream water and lake water samples were collected from the Qiangyong Glacier Basin. The spatiotemporal distribution and transportation of Hg from glacier to lake were investigated. Significant diurnal variations of dissolved Hg(DHg) concentrations were observed in the river water, with low concentrations in the morning(8:00 am–14:00 pm) and high concentrations in the afternoon(16:00 pm–20:00 pm). The DHg concentrations were exponentially correlated with runoff, which indicated that runoff was the dominant factor affecting DHg concentrations in the river water. Moreover, significant decreases of Hg were observed during transportation from glacier to lake. DHg adsorption onto particulates followed by the sedimentation of particulate-bound Hg(PHg) could be possible as an important Hg removal mechanism during the transportation process. Significant decreases in Hg concentrations were observed downstream of Xiao Qiangyong Lake, which indicated that the high-elevation lake system could significantly affect the distribution and transportation of Hg in the Qiangyong Glacier Basin. | Shiwei Sun | 2016 | Journal of Environmental Sciences2016，28，6： | 10 |
| 4 | Insights into mercury in glacier snow and its incorporation into meltwater runoff based on observations in the southern Tibetan Plateau显示文摘The Tibetan Plateau(TP) is recognized as 'Water Tower of Asia'. Yet our understanding of mechanisms influencing incorporation of mercury(Hg) into freshwater in mountain glaciers on the TP remains quite limited. Extensive sampling of environmental matrices(e.g., snow/ice)were conducted on the East Rongbuk glacier on Mt. Everest and Zhadang glacier on Mt.Nyainqentanglha for Hg speciation analysis. Speciated Hg behaved quite different during snowmelt: a preferential early release of DHg(dissolved Hg) was observed at the onset of snowmelt, whereas PHg(particulate-bound Hg) and THg(total Hg) become relatively enriched in snow and released later. Small fraction of Hg in snow was lost during a snowmelt day(18.9%–34.7%) with a large proportion(58.1%–87.3%) contributed by PHg decrease, indicating that the deposited Hg is most likely retained in glacier snow/ice. Furthermore, THg were positively correlated with PHg and crustal major ions(e.g., Ca^(2+), Mg^(2+)) during snowmelt, indicating that Hg is mainly migrated with particulates. The main pathway of Hg loss during snowmelt was most probably associated with release of PHg with meltwater, which was greatly influenced by ablation intensity of snow/ice. This should be paid particular concern as Hg preserved in mountain glaciers will mostly enter aquatic ecosystem as climate warms, impacting on downstream ecosystems adversely. Obvious decrease of THg during the downstream transport from glacier was observed with a large proportion contributed by PHg decrease. The main removal mechanism of Hg was associated with sedimentation of PHg during the transport process. | Shiwei Sun Shichang Kang Junming Guo Qianggong Zhang Rukumesh Paudyal Xuejun Sun Dahe Qin | 2018 | Journal of Environmental Sciences2018，30，6： | 9 |
| 5 | In situ plasmonic optical fiber detection of the state of charge of supercapacitors for renewable energy storage显示文摘In situ and continuous monitoring of electrochemical activity is key to understanding and evaluating the operation mechanism and efficiency of energy storage devices.However,this task remains challenging.For example,the present methods are not capable of providing the real-time information about the state of charge(SOC)of the energy storage devices while in operation.To address this,a novel approach based on an electrochemical surface plasmon resonance(SPR)optical fiber sensor is proposed here.This approach offers the capability of in situ comprehensive monitoring of the electrochemical activity(the electrode potential and the SOC)of supercapacitors(used as an example).The sensor adopted is a tilted fiber Bragg grating imprinted in a commercial single-mode fiber and coated with a nanoscale gold film for high-efficiency SPR excitation.Unlike conventional“bulk”detection methods for electrode activity,our approach targets the“localized”(sub-μm-scale)charge state of the ions adjacent to the electrode interface of supercapacitors by monitoring the properties of the SPR wave on the fiber sensor surface located adjacent to the electrode.A stable and reproducible correlation between the real-time charge–discharge cycles of the supercapacitors and the optical transmission of the optical fiber has been found.Moreover,the method proposed is inherently immune to temperature cross-talk because of the presence of environmentally insensitive reference features in the optical transmission spectrum of the devices.Finally,this particular application is ideally suited to the fundamental qualities of optical fiber sensors,such as their compact size,flexible shape,and remote operation capability,thereby opening the way for other opportunities for electrochemical monitoring in various hard-to-reach spaces and remote environments. | Jiajie Lao Peng Sun Fu Liu Xuejun Zhang Chuanxi Zhao Wenjie Mai Tuan Guo Gaozhi Xiao Jacques Albert | 2018 | Light(Science & Applications)2018，7，1： | 8 |
| 6 | On developing data-driven turbulence model for DG solution of RANS显示文摘High-order Discontinuous Galerkin(DG) methods have been receiving more and more attentions in the area of Computational Fluid Dynamics(CFD) because of their high-accuracy property. However, it is still a challenge to obtain converged solution rapidly when solving the Reynolds Averaged Navier–Stokes(RANS) equations since the turbulence models significantly increase the nonlinearity of discretization system. The overall goal of this research is to develop an Artificial Neural Networks(ANNs) model with low complexity acting as an algebraic turbulence model to estimate the turbulence eddy viscosity for RANS. The ANN turbulence model is off-line trained using the training data generated by the widely used Spalart–Allmaras(SA) turbulence model before the Optimal Brain Surgeon(OBS) is employed to determine the relevancy of input features.Using the selected relevant features, a fully connected ANN model is constructed. The performance of the developed ANN model is numerically tested in the framework of DG for RANS, where the‘‘DG+ANN' method provides robust and steady convergence compared to the ‘‘DG+SA' method. The results demonstrate the promising potential to develop a general turbulence model based on artificial intelligence in the future given the training data covering a large rang of flow conditions. | Liang SUN Wei AN Xuejun LIU Hongqiang LYU | 2019 | Chinese Journal of Aeronautics2019，32，8： | 7 |
| 7 | Design and Experimental Research on Seedling Pick-Up Mechanism of Planetary Gear Train with Combined Non-circular Gear Transmission显示文摘Currently, transplanting mechanisms for dryland plug seedlings in China are mainly semiautomatic and have low efficiency. The rotary seedling pick-up mechanism with a planetary gear train for non-uniform intermittent transmission, and a concave and convex locking arc device, has a large rigid impact. To solve these problems, according to the design requirements for a dryland plug seedling transplanting mechanism, a rotary seedling pick-up mechanism of a planetary gear train with combined non-circular gear transmission of incomplete eccentric circular and noncircular gears was proposed. This has the characteristics of two-times greater fluctuation of the transmission ratio in a cycle, and can achieve a non-uniform continuous drive. Through analysis of the working principle of the seedling pick-up mechanism, its kinematics model was established. The human–computer interaction optimization method and self-developed computer-aided analysis and optimization software were used to obtain a set of parameters that satisfy the operation requirements of the seedling pick-up mechanism. According to the optimized parameters, the structure of the seedling pick-up mechanism was designed, a virtual prototype of the mechanism was created, and a physical prototype was manufactured. A virtual motion simulation of the mechanism was performed, high-speed photographic kinematics tests were conducted, and the kinematic properties of the physical prototype were investigated, whereby the correctness of the theoretical model and the optimized design of the mechanism were verified. Further, laboratory seedling pick-up tests were conducted. The success ratio of seedling pick-up was 93.8% when the seedling pick-up efficiency of the mechanism was 60 plants per minute per row, indicating that the mechanism has a high efficiency and success ratio for seedling pick-up and can be applied to a dryland plug seedling transplanter. | Yaxin Yu Jikun Liu Bingliang Ye Gaohong Yu Xuejun Jin Liang Sun Junhua Tong | 2019 | Chinese Journal of Mechanical Engineering2019，32，3： | 7 |
| 8 | Microstructure Evolution and Tensile Properties of Ti_3Al/Ni-based Superalloy Welded Joint显示文摘In the present work,the dissimilar joining of a Ti_3AI-based alloy to a Ni-based superalloy was attempted by gas tungsten arc(GTA) welding technology.Sound joints were successfully achieved by using a Cu—Ni alloy as filler material.According to X-ray energy dispersive spectroscopy and X-ray diffraction analysis results three transitional layers at the weld/Ti_3AI interface were verified as follows:Ti_2AINb phase dissolved with Cu and Ni;AI(Cu,Ni)_2Ti,(Cu,Ni)_2Ti and(Nb,Ti) solid solution;Cu-rich phase and a complex multi-element phase.The In718/weld interface is characterized by solid solutions of Ni,Cu,Cr,Fe and Nb.The average tensile strength of the as-welded joints at room temperature is 1 63 MPa,and after a post—weld heat treatment it is increased slightly to 177 MPa.The fracture occurred at the surfacial layer of the joined Ti_3AI base alloy,indicating that the Ti_2AINb layer dissolved with Cu and Ni is the weak link of the Ti_3AI/ln71 8 joint. | Bingqing Chen Huaping Xiong Bingbing Sun Siyi Tang Shaoqing Guo Xuejun Zhang | 2014 | Journal of Materials Science & Technology2014，30，7： | 7 |
| 9 | Hydrogen-rich saline protects against ultraviolet B radiation injury in rats显示文摘Exposure of skin to solar ultraviolet(UV) radiation induces photo-damage.Ultraviolet B(UVB) is the major component of UV radiation which induces the production of reactive oxygen species(ROS) and plays an impor-tant role in photo-damage.Hydrogen gas reduces ROS and alleviates inflammation.In this study,we sought to demonstrate that hydrogen-rich saline has the effect on skin injuries caused by UVB radiation.UVB radiation was irradiated on female C57BL/6 rats to induce skin injury.Hydrogen-rich saline and nitrogen-rich saline were ad-ministered to rats by intraperitoneal injection.Skin damage was detected by microscope after injury.UVB radia-tion had a significant affection in tumor necrosis factor alpha,interleukin(IL)-1β and IL-6 levels,tissue superox-ide dismutase,malondialdehyde and nitric oxide activity.Hydrogen-rich saline had a protective effect by altering the levels of these markers and relieved morphological skin injury.Hydrogen-rich saline protected against UVB radiation injury,possibly by reducing inflammation and oxidative stress. | Ze Guo Bingrong Zhou Wei Li Xuejun Sun Dan Luo | 2012 | The Journal of Biomedical Research2012，26，5： | 6 |
| 10 | Pioneering function of Isl1 in the epigenetic control of cardiomyocyte cell fate显示文摘Generation of widely differing and specialized cell types from a single totipotent zygote involves large-scale transcriptional changes and chromatin reorganization. Pioneer transcription factors play key roles in programming the epigenome and facilitating recruitment of additional regulatory factors during successive cell lineage specification and differentiation steps. Here we show that Isl1 acts as a pioneer factor driving cardiomyocyte lineage commitment by shaping the chromatin landscape of cardiac progenitor cells. Using an Isl1 hypomorphic mouse line which shows congenital heart defects, genome-wide profiling of Isl1 binding together with RNA- and ATAC-sequencing of cardiac progenitor cells and their derivatives, we uncover a regulatory network downstream of Isl1 that orchestrates cardiogenesis. Mechanistically, we show that Isl1 binds to compacted chromatin and works in concert with the Brg1-Baf60c-based SWI/SNF complex to promote permissive cardiac lineage-specific alterations in the chromatin landscape not only of genes with critical functions in cardiac progenitor cells, but also of cardiomyocyte structural genes that are highly expressed when Isl1 itself is no longer present. Thus, the Isl1/Brg1-Baf60c complex plays a crucial role in orchestrating proper cardiogenesis and in establishing epigenetic memory of cardiomyocyte fate commitment. | Rui Gao Xingqun Liang Sirisha Cheedipudi Julio Cordero Xue Jiang Qingquan Zhang Luca Caputo Stefan Günther Carsten Kuenne Yonggang Ren Shoumo Bhattacharya Xuejun Yuan Guillermo Barreto Yihan Chen Thomas Braun Sylvia M. Evans Yunfu Sun Gergana Dobreva | 2019 | Cell Research2019，29，6： | 5 |
| 11 | GWAS promotes precision medicine in China显示文摘Most common diseases and genetic traits are associated with multiple genetic and environmental factors as well as consequences of their interactions(Chakravarti and Little,2003;Guttmacher et al.,2004).In recent years,genetic analyses of human diseases with quantitative traits were primarily focused on identifying common variants through genome-wide association studies(GWASs),and many novel susceptibility genes implicating | Liangdan Sun Xuejun Zhang Lin He | 2016 | Journal of Genetics and Genomics2016，43，8： | 5 |
| 12 | Association of the Late Cornified Envelope-3 Genes with Psoriasis and Psoriatic Arthritis:A Systematic Review显示文摘Psoriasis(Ps)and psoriatic arthritis(Ps A)are genetically complex diseases with strong genetic evidence.Recently,susceptibility genes for Ps and Ps A have been identified within the late cornified envelop(LCE)gene cluster,especially the cluster 3(LCE3)genes.It is noteworthy that the deletion of LCE3B and LCE3C(LCE3C_LCE3B-del)is significantly associated with these two diseases.Gene-gene interactions between LCE3 genes and other genes are associated with Ps and Ps A.LCE3 genes also have pleiotropic effect on some autoimmune diseases,such as rheumatoid arthritis,atopic dermatitis and systemic lupus erythematosus.Further studies need to focus on the potential function of LCE3 genes in the pathogenesis of Ps and Ps A in the future. | Changbing Shen Jing Gao Xianyong Yin Yujun Sheng Liangdan Sun Yong Cui Xuejun Zhang | 2015 | Journal of Genetics and Genomics2015，42，2： | 4 |
| 13 | A new method to evaluate the hydraulic activity of Al-Si materials显示文摘Slag,fly ash,gangue and 500℃ calcined gangue are analyzed by using identical coupled plasma optical emission spectroscopy (ICP),X-ray photoelectron spec-troscopy (XPS),infrared spectroscopy (IR) and magnetic angle spinning nuclear magnetic resonance (MAS NMR). Research results show that there is a negative linear relationship between the Si 2p and Al 2p binding energies of Al-Si materials and the compressive strength of aluminosilicate based cementitious materials prepared with these Al-Si materials,i.e. the lower the binding energies,the higher the compressive strength. Indeed,the Si 2p and Al 2p binding energies of Al-Si materials can be used to indicate their hydraulic activity. The binding energies of the four examined materials increase in the order of slag,fly ash,500℃ calcined gangue and untreated gangue. Moreover,the binding energies of Si 2p,Al 2p and O 1s of every Al-Si material have excellent correlation. By using the Al 2p binding energy and 27Al MAS NMR spectra,the coordination number of aluminum in slag is determined to be four,while that in gangue,is six. Based on the aforementioned discoveries,this paper presents a new effective method to evaluate the hydraulic activity of Al-Si materials by using the surface binding energies of silicon and alu-minum of Al-Si materials. | LI HuaJian SUN HengHu TIE XuChu XIAO XueJun | 2008 | Science China(Technological Sciences)2008，51，2： | 4 |
| 14 | Development of an innovative one-step nested PCR strategy for virus detection using the LNA technique显示文摘Dear Editor,Polymerase chain reaction(PCR)is a molecular diagnostic technique that has been widely used for diagnosing viral diseases.Nested PCR(N-PCR)is a variation on the standard PCR technique that involves two amplification steps,yielding greater sensitivity and specificity.But there are two main disadvantages:the protocol is more complex than conventional PCR,and the risk of cross-contamination is relatively high.One-step nested PCR(OSN-PCR)enables conventional N-PCR to be performed as a closed reaction in a single tube that contains both outer and inner primers.This strategy makes OSN-PCR more rapid than N-PCR,lowers the probability of cross-contamination,and requires a smaller amount of reagents. | Ji Wang Li Zhao Zhihua Sun Guixia Li Peihua Niu DANDi Li Lianjun Wang Yi Zhang Zhishan Feng Xuejun Ma | 2019 | Science China(Life Sciences)2019，62，3： | 4 |
| 15 | Revisiting the Concentration Observations and Source Apportionment of Atmospheric Ammonia显示文摘While China’s Air Pollution Prevention and Control Action Plan on particulate matter since 2013 has reduced sulfate significantly,aerosol ammonium nitrate remains high in East China.As the high nitrate abundances are strongly linked with ammonia,reducing ammonia emissions is becoming increasingly important to improve the air quality of China.Although satellite data provide evidence of substantial increases in atmospheric ammonia concentrations over major agricultural regions,long-term surface observation of ammonia concentrations are sparse.In addition,there is still no consensus on whether agricultural or non-agricultural emissions dominate the urban ammonia budget.Identifying the ammonia source by nitrogen isotope helps in designing a mitigation strategy for policymakers,but existing methods have not been well validated.Revisiting the concentration measurements and identifying source apportionment of atmospheric ammonia is thus an essential step towards reducing ammonia emissions. | Yuepeng PAN Mengna GU Yuexin HE Dianming WU Chunyan LIU Linlin SONG Shili TIAN Xuemei LÜ Yang SUN Tao SONG Wendell WWALTERS Xuejun LIU Nicholas AMARTIN Qianqian ZHANG Yunting FANG Valerio FERRACCI Yuesi WANG | 2020 | Advances in Atmospheric Sciences2020，37，9： | 4 |
| 16 | A novel one-step reaction sodium-sulfur battery with high areal sulfur loading on hierarchical porous carbon fiber显示文摘Room temperature sodium-sulfur(RT Na-S)batteries are gaining extensive attention as attractive alternatives for large-scale energy storage,due to low cost and high abundancy of sodium and sulfur in nature.However,the dilemmas regarding soluble polysulfides(Na_(2)Sn,4 | Qiubo Guo Shuo Sun Keun-il Kim Hongshen Zhang Xuejun Liu Chenglin Yan Hui Xia | 2021 | Carbon Energy2021，3，3： | 3 |
| 17 | An open conformation determined by a structural switch for 2A protease from coxsackievirus A16显示文摘Coxsackievirus A16 belongs to the family Picornaviridae,and is a major agent of hand-foot-and-mouth disease that infects mostly children,and to date no vaccines or antivi-ral therapies are available.2A protease of enterovirus is a nonstructural protein and possesses both self-cleavage activity and the ability to cleave the eukaryotic translation initiation factor 4G.Here we present the crystal structure of coxsackievirus A162A protease,which interestingly forms hexamers in crystal as well as in solution.This structure shows an open conformation,with its active site accessible,ready for substrate binding and cleav-age activity.In conjunction with a previously reported“closed”state structure of human rhinovirus 2,we were able to develop a detailed hypothesis for the conforma-tional conversion triggered by two“switcher”residues Glu88 and Tyr89 located within the bll2-cII loop.Substrate recognition assays revealed that amino acid residues P1′,P2 and P4 are essential for substrate specificity,which was verifi ed by our substrate binding model.In addition,we compared the in vitro cleavage effi ciency of 2A pro-teases from coxsackievirus A16 and enterovirus 71 upon the same substrates by fl uorescence resonance energy transfer(FRET),and observed higher protease activity of enterovirus 71 compared to that of coxsackievirus A16.In conclusion,our study shows an open conformation of coxsackievirus A162A protease and the underlying mechanisms for conformational conversion and substrate specifi city.These new insights should facilitate the future rational design of effi cient 2A protease inhibitors. | Yao Sun Xiangxi Wang Shuai Yuan Minghao Dang Xuemei Li Xuejun CZhang Zihe Rao | 2013 | Protein & Cell2013，4，10： | 3 |
| 18 | DNA methylation-based subclassification of psoriasis in the Chinese Han population显示文摘Psoriasis (Ps)is an inflammatory skin disease caused by genetic and environmental factors.Previous studies on DNA methylation (DNAm)found genetic markers that are closely associated with Ps,and evidence has shown that DNAm mediates genetic risk in Ps.In this study,Consensus Clustering was used to analyze DNAm data,and 114Ps patients were divided into three subclassifications.Investigation of the clinical characteristics and copy number variations (CNVs)of DEFB4,IL22,and LCE3C in the three subclassifications revealed no significant differences in gender ratio and in Ps area and severity index (PASI)score.The proportion of late-onset (≥40 years)Ps patients was significantly higher in type I than in types H and III (P =0.035).Type III contained the smallest proportion of smokers and the largest proportion of non-smoking Ps patients (P =0.086).The CNVs of DEFB4and LCE3C showed no significant differences but the CNV oflL22significantly differed among the three subelassifications (P =0.044).This study is the first to profile Ps subclassifications based on DNAm data in the Chinese Han population.These results are useful in the treatment and management of Ps from the molecular and genetic perspectives. | Fusheng Zhou Changbing Shen Yi-Hsiang Hsu Jing Gao Jinfa Dou Randy KO Xiaodong Zheng Liangdan Sun Yong Cui Xuejun Zhang | 2018 | Frontiers of Medicine2018，12，6： | 3 |
| 19 | Mooring observed mode-2 internal solitary waves in the northern South China Sea显示文摘The mode-2 internal solitary waves(ISWs)generated by mode-2 internal tide(IT)are identified by mooring observations in the northern South China Sea(SCS)from 2016 to 2017.Two mode-2 ISWs with a re-appearance period of 24.9 h observed on 29 and 30 July 2016 are characterized by type-b ISWs.They occurred when the isotherms compressed obviously in the vertical direction.Modal decomposition of IT horizontal currents shows that the vertical compression of the isotherms is mainly caused by diurnal mode-2 IT.The analysis of the role of the density stratification reveals that a deeper and thinner pycnocline is favorable for generation of mode-2 ISWs rather than pycnocline intensity.By comparing the mode-2 nonlinear,dispersion coefficients and the Ursell numbers calculated based on the stratification associated with different kinds of ITs with the observation results,it is shown that the diurnal mode-2 IT plays a crucial role in the generation of the mode-2 ISWs.When the diurnal mode-2 IT interacts with the semidiurnal IT and causes a deeper and thinner pycnocline,the mode-2 ISWs are easily excited. | Liang Chen Xuejun Xiong Quanan Zheng Yeli Yuan Long Yu Yanliang Guo Guangbing Yang Xia Ju Jia Sun Zhenli Hui | 2020 | Acta Oceanologica Sinica2020，39，11： | 3 |
| 20 | Impact of warm mesoscale eddy on tropical cyclone intensity显示文摘The spatial-temporal patterns of tropical cyclone(TC) intensity changes caused by the warm ocean mesoscale eddy(WOME) distribution are evaluated using two sets of idealized numerical experiments. The results show that the TC was intensified and weakened when a WOME was close to and far away from the TC center, respectively.The area where the WOME enhanced(weakened) TC intensity is called the inner(outer) area in this study.Amplitudes of the enhancement and weakening caused by the WOME in the inner and outer area decreased and increased over time, while the ranges of the inner and outer area diminished and expanded, respectively. The WOME in the inner area strengthened the secondary circulation of the TC, increased heat fluxes, strengthened the symmetry, and weakened the outer spiral rainband, which enhanced TC intensity. The effect was opposite if the WOME was in the outer area, and it weakened the TC intensity. The idealized simulation employed a stationary TC, and thus the results may only be applied to TCs with slow propagation. These findings can improve our understanding of the interactions between TC and the WOME and are helpful for improving TC intensity forecasting by considering the effect of the WOME in the outer areas. | Jia Sun Guihua Wang Xuejun Xiong Zhenli Hui Xiaomin Hu Zheng Ling Long Yu Guangbing Yang Yanliang Guo Xia Ju Liang Chen | 2020 | Acta Oceanologica Sinica2020，39，8： | 3 |
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