|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Impacts of Diurnal Variation of Mountain-plain Solenoid Circulations on Precipitation and Vortices East of the Tibetan Plateau during the Mei-yu Season显示文摘Diurnal variations of two mountain-plain solenoid(MPS) circulations associated with 'first-step' terrain [Tibetan Plateau(TP)] and 'second-step' terrain(high mountains between the TP and 'east plains') in China and their influence on the southwest vortex(SWV) and the mei-yu front vortex(MYFV) were investigated via a semi-idealized mesoscale numerical model [Weather Research and Forecasting(WRF)] simulation integrated with ten-day average fields(mei-yu period of 1–10 July 2007). The simulations successfully reproduced two MPS circulations related to first- and second-step terrain, diurnal variations from the eastern edge of the TP to the Yangtze River–Huaihe River valleys(YHRV), and two precipitation maximum centers related to the SWV, MYFV. Analyses of the averaged final seven-day simulation showed the different diurnal peaks of precipitation at different regions: from the afternoon to early evening at the eastern edge of the TP; in the early evening to the next early morning in the Sichuan Basin(SCB); and in the late evening to the next early morning over the mei-yu front(MYF). Analyses of individual two-day cases confirmed that the upward branches of the nighttime MPS circulations enhanced the precipitation over the SWV and the MYFV and revealed that the eastward extension of the SWV and its convection were conducive to triggering the MYFVs. The eastward propagation of a rainfall streak from the eastern edge of the TP to the eastern coastal region was primarily due to a series of convective activities of several systems from west to east, including the MPS between the TP and SCB, the SWV, the MPS between second-step terrain and the east plains, and the MYFV. | ZHANG Yuanchun SUN Jianhua FU Shenming | 2014 | Advances in Atmospheric Sciences2014，31，1： | 20 |
| 2 | A comparison of two kinds of eastward-moving mesoscale vortices during the mei-yu period of 2010显示文摘During the mei-yu period,the east edge of the Tibetan Plateau and the Dabie Mountain are two main sources of eastward-moving mesoscale vortices along the mei-yu front(MYF).In this study,an eastward-moving southwest vortex(SWV) and an eastward-moving Dabie vortex(DBV) during the mei-yu period of 2010 have been investigated to clarify the main similarities and differences between them.The synoptic analyses reveal that the SWV and DBV were both located at the lower troposphere;however,the SWV developed in a 'from top down' trend,whereas the DBV developed in an opposite way.There were obvious surface closed low centers corresponding to the DBV during its life span,whereas for the SWV,the closed low center only appeared at the mature stage.Cold and warm air intersected intensely after the formation of both the vortices,and the cold advection in the SWV case was stronger than that in the DBV case,whereas the warm advection in the DBV case was more intense than that in the SWV case.The Bay of Bengal and the South China Sea were main moisture sources for the SWV,whereas for the DBV,in addition to the above two moisture sources,the East China Sea was also an important moisture source.The vorticity budget indicates that the convergence was the most important common factor conducive to the formation,development,and maintenance of the SWV and DBV,whereas the conversion from the vertical vorticity to the horizontal one(tilting) was the most important common factor caused the dissipation of both of the vortices.The kinetic energy(KE) budget reveals that the KE generation by the rotational wind was the dominant factor for the enhancement of KE associated with the SWV,whereas for the DBV,the KE transport by the rotational wind was more important than the KE generation.The KE associated with the SWV and the DBV weakened with different mechanisms during the decaying stage.Furthermore,the characteristics of baroclinic and barotropic energy conversions during the life spans of both vortices indicate that the SWV and DBV both belong to the kind of subtropical mesoscale vortices. | FU ShenMing YU Fei WANG DongHai XIA RuDi | 2013 | Science China Earth Sciences2013，56，2： | 18 |
| 3 | A Review of Research on Warm-Sector Heavy Rainfall in China显示文摘Warm-sector heavy rainfall (WSHR) events in China have been investigated for many years. Studies have investigated the synoptic weather conditions during WSHR formation, the categories and general features, the triggering mechanism, and structural features of mesoscale convective systems during these rainfall events. The main results of WSHR studies in recent years are summarized in this paper. However, WSHR caused by micro- to mesoscale systems often occurs abruptly and locally, making both numerical model predictions and objective forecasts difficult. Further research is needed in three areas:(1) The mechanisms controlling WSHR events need to be understood to clarify the specific effects of various factors and indicate the influences of these factors under different synoptic background circulations. This would enable an understanding of the mechanisms of formation, maintenance, and organization of the convections in WSHR events.(2) In addition to South China, WSHR events also occur during the concentrated summer precipitation in the Yangtze River-Huaihe River Valley and North China. A high spatial and temporal resolution dataset should be used to analyze the distribution and environmental conditions, and to further compare the differences and similarities of the triggering and maintenance mechanisms of WSHR events in different regions.(3) More studies of the mechanisms are required, as well as improvements to the model initial conditions and physical processes based on multi-source observations, especially the description of the triggering process and the microphysical parameterization. This will improve the numerical prediction of WSHR events. | Jianhua SUN Yuanchun ZHANG Ruixin LIU Shenming FU Fuyou TIAN | 2019 | Advances in Atmospheric Sciences2019，36，12： | 13 |
| 4 | Science and Prediction of Heavy Rainfall over China:Research Progress since the Reform and Opening-Up of New China显示文摘This paper reviews the major progress on development of the science and prediction of heavy rainfall over China since the beginning of the reform and opening-up of new China(roughly between 1980 and 2019).The progress of research on the physical mechanisms of heavy rainfall over China is summarized from three perspectives:1)the relevant synoptic weather systems,2)heavy rainfall in major sub-regions of China,and 3)heavy rainfall induced by typhoons.The development and application of forecasting techniques for heavy rainfall are summarized in terms of numerical weather prediction techniques and objective forecasting methods.Greatly aided by the rapid progress in meteorological observing technology and substantial improvement in electronic computing,studies of heavy rainfall in China have advanced to investigating the evolution of heavy-rain-producing storms and observational analysis of the cloud microphysical features.A deeper and more systematic understanding of the synoptic systems of importance to the production of heavy rainfall has also been developed.Operational forecast of heavy rainfall in China has changed from subjective weather event forecasts to a combination of both subjective and objective quantitative precipitation forecasts,and is now advancing toward probabilistic quantitative precipitation forecasts with the provision of forecast uncertainty information. | Yali LUO Jisong SUN Ying LI Rudi XIA Yu DU Shuai YANG Yuanchun ZHANG Jing CHEN Kan DAI Xueshun SHEN Haoming CHEN Feifan ZHOU Yimin LIU Shenming FU Mengwen WU Tiangui XIAO Yangruixue CHEN Huiqi LI Mingxin LI | 2020 | Journal of Meteorological Research2020，34，3： | 10 |
| 5 | Simulation of Quasi-Linear Mesoscale Convective Systems in Northern China:Lightning Activities and Storm Structure显示文摘Two intense quasi-linear mesoscale convective systems(QLMCSs) in northern China were simulated using the WRF(Weather Research and Forecasting) model and the 3D-Var(three-dimensional variational) analysis system of the ARPS(Advanced Regional Prediction System) model.A new method in which the lightning density is calculated using both the precipitation and non-precipitation ice mass was developed to reveal the relationship between the lightning activities and QLMCS structures.Results indicate that,compared with calculating the results using two previous methods,the lightning density calculated using the new method presented in this study is in better accordance with observations.Based on the calculated lightning densities using the new method,it was found that most lightning activity was initiated on the right side and at the front of the QLMCSs,where the surface wind field converged intensely.The CAPE was much stronger ahead of the southeastward progressing QLMCS than to the back it,and their lightning events mainly occurred in regions with a large gradient of CAPE.Comparisons between lightning and non-lightning regions indicated that lightning regions featured more intense ascending motion than non-lightning regions;the vertical ranges of maximum reflectivity between lightning and non-lightning regions were very different;and the ice mixing ratio featured no significant differences between the lightning and non-lightning regions. | Wanli LI Xiushu QIE Shenming FU Debin SU Yonghai SHEN | 2016 | Advances in Atmospheric Sciences2016，33，1： | 7 |
| 6 | Effects of chronic heat stress on granulosa cell apoptosis and follicular atresia in mouse ovary显示文摘Background: Heat stress is known to alter follicular dynamics and granulosa cell function and may contribute to the diminished reproductive efficiency commonly observed in mammals during the summer. Although several investigators have studied heat-induced ovarian injury, few reports have focused on the effects of chronic heat stress on ovarian function and the molecular mechanisms through which it induces ovarian injury.Methods: In Exp. 1, 48 female mice were assigned to a control or heat-stressed treatment. After exposure to a constant temperature of 25 °C for 7, 14, 21 or 28 d(n = 6) or to 42 °C for 3 h per d for 7, 14, 21 or 28 d(n = 6), the mice were euthanized and their ovaries were analyzed for follicular atresia, granulosa cell apoptosis, changes in the abundance of HSP70 protein and serum concentrations of estradiol. In Exp. 2, the expression of HSP70 and aromatase was quantified in antral follicles cultured in vitro at 37 or 42 °C for 24 h. In Exp. 3, granulosa cells from ovaries maintained at 37 or 41 °C for 2 h were analyzed for their expression of HSP70, Bim, caspase-3 and cleaved caspase-3.Results: In Exp. 1, body weight and food intake of heat-stressed mice decreased(P < 0.05) compared with control mice while the concentration of estradiol in serum was lower(P < 0.05) in heat-stressed mice than in control mice. Compared with control mice, the percentage of atretic follicles and the number of antral follicles with severe apoptotic signals were increased(P < 0.05) after 21 d of heat-stressed treatment. HSP70 protein was more abundant(P < 0.05) in heat-stressed mice than control mice. In Exp. 2, heat stress increased HSP70 and decreased aromatase proteins(P < 0.05) in antral follicles. In Exp. 3, TUNEL-positive granulosa cells from heat-stressed ovaries were observed concomitant with a significant increase in HSP70, Bim and cleaved caspase-3 protein.Conclusion: Heat-stress in mice decrease estradiol in serum and aromatase in antral follicles but increased number of atretic follicles and granulosa cell undergoing apoptosis which may explain the decreased fertility commonly observed in heat-stressed animals. | Jieyun Li Hui Gao Zhen Tian Yi Wu Yingzheng Wang Yuan Fang Lu Lin Ying Han Shuaishuai Wu Ihtesham Ul Haq Shenming Zeng | 2017 | Journal of Animal Science and Biotechnology2017，8，1： | 5 |
| 7 | Main Energy Paths and Energy Cascade Processes of the Two Types of Persistent Heavy Rainfall Events over the Yangtze River–Huaihe River Basin显示文摘Two types of persistent heavy rainfall events(PHREs) over the Yangtze River–Huaihe River Basin were determined in a recent statistical study: type A, whose precipitation is mainly located to the south of the Yangtze River; and type B, whose precipitation is mainly located to the north of the river. The present study investigated these two PHRE types using a newly derived set of energy equations to show the scale interaction and main energy paths contributing to the persistence of the precipitation. The main results were as follows. The available potential energy(APE) and kinetic energy(KE) associated with both PHRE types generally increased upward in the troposphere, with the energy of the type-A PHREs stronger than that of the type-B PHREs(except for in the middle troposphere). There were two main common and universal energy paths of the two PHRE types:(1) the baroclinic energy conversion from APE to KE was the dominant energy source for the evolution of large-scale background circulations; and(2) the downscaled energy cascade processes of KE and APE were vital for sustaining the eddy flow, which directly caused the PHREs. The significant differences between the two PHRE types mainly appeared in the lower troposphere, where the baroclinic energy conversion associated with the eddy flow in type-A PHREs was from KE to APE, which reduced the intensity of the precipitation-related eddy flow; whereas, the conversion in type-B PHREs was from APE to KE, which enhanced the eddy flow. | Yuanchun ZHANG Jianhua SUN Shenming FU | 2017 | Advances in Atmospheric Sciences2017，34，2： | 4 |
| 8 | Electrochemical selective determination of ascorbic acid at redox active olymer modified electrode derived from direct blue 71 显示文摘 | Kumar S A Lo P H Chen Shenming | 2008 | Biosensors and Bioelectronics2008，24，4： | 1 |
| 9 | 西北太平洋上一次极端强度爆发气旋对流层低层风速迅速增强的能量特征分析显示文摘2011年一月中旬,西北太平洋上发生了一次罕见的双子气旋事件。该双子气旋中的一个气旋(简称气旋A)迅速发展成为一个强度堪比台风的极端强度爆发气旋。本文采用旋转风,辐散风动能收支分析来研究造成该极端强度爆发气旋风速迅速增强的原因。研究发现,在气旋A的最快发展期,对流层低层,气旋的总动能迅速增大,风速增大最迅速的象限是气旋的东南象限,而西北象限的增速最慢。旋转风动能的增长显著,对应了总动能的增大,而辐散风的动能显著小于旋转风动能并且主要表现出减少的趋势。旋转风动能的增大与气旋A在水平和垂直方向上的伸展过程相一致,非正交风动能在旋转风动能大值区增强总动能,这促使了对流层低层最大风速的形成,然而,在辐散风动能较强的区域,非正交风动能主要减弱总动能。向北的总动能输送以及气压梯度力对旋转风动能的做功是气旋A风速迅速增大的主导因子,尤其是在其东南象限。然而,从旋转风向辐散风动能的转换在一定程度上延缓了气旋风速的增强过程。 | JIN Shuanglong FENG Shuanglei SHEN Wei FU Shenming JIANG Lizhi SUN Jianhua | 2020 | Atmospheric and Oceanic Science Letters2020，13，5： | 1 |
| 10 | Endovascular repair of a type B aortic dissection with a ventricular septal defect occluder显示文摘 | Guangqi Chang Huishen Wang Wei Chen Chen Yao Zilun Li Shenming Wang | 2010 | Journal of Vascular Surgery2010，，6： | 1 |
| 11 | Electroeatalytic Reduction of Oxyen and Hydrogen Peroxide at Poly(p-Aminobenzene Sul-fonic Acid)-Modified Glassy Carbon Electrodes显示文摘 | Kumar S A Chen Shenming | 2007 | J Mol Catal A:Chem2007，278，12： | 1 |
| 12 | Electrochemical Preparation of Hybrid Poly(New Fuchsin) and Silicomolybdate Polyoxometalate Film Modified Electrodes显示文摘 | Fa Yuhsiang | 2004 | J Electroanal Chem2004，567，1： | 1 |
| 13 | Polyaniline and poly(flavin adenine dinucleotide)doped multi-walled carbon nanotubes for p-acetamidophenol sensor显示文摘 | Li Ying Yogeswaran Umasankar Chen Shenming | 2009 | Talanta2009，79，2： | 1 |
| 14 | Electrocatalytic reduction of oxyen and hydrogen peroxide at poly(p-aminobenzene sulfonic acid) -modified glassy carbon electrodes显示文摘 | ASHOK KUMAR S CHEN Shenming | 2007 | J Mol Catal: A2007，278，2： | 1 |
| 15 | A novel nonenzymatic hydrogen peroxide sensor based on re- duced grapheneoxidc/ZnO composite modified electrode显示文摘 | Palanisam Selvakumar Chen Shenming Sarawathi Ramiah | 2012 | Sensors Actuators B: Chem2012，166，167： | 1 |
| 16 | The electrochemical self-assembly of the FAD modified zinc oxide films and their electrocatalytic properties 显示文摘 | Lin Kuochiang Chen Shenming | 2005 | Journal of Electroanalytical Chemistry2005，578，： | 1 |
| 17 | Characterization and electrocata- lyric propertices of composite poly(new fuchsin) and phospho- molybdate films 显示文摘 | Chem Shenming Fa Yuhsiang | 2005 | Electroanalysis2005，17，7： | 1 |
| 18 | The electrochemical properties of dopamine, epinephrine, norepinephrine, and their electrocatalytic reactions on cobalt (Ⅱ)hexacyanoferrate films显示文摘 | Chen Shenming Peng Kuotzu | 2003 | Journal of Electroanalytical Chemistry2003，547，2： | 1 |
| 19 | 显示文摘 | Cheng X R ShenM | 2007 | Solid State Commun2007，141，11： | 1 |
| 20 | Super-Resolution for Face Image with an Improved K-NN Search Strategy显示文摘Recently, neighbor embedding based face super-resolution(SR) methods have shown the ability for achieving high-quality face images, those methods are based on the assumption that the same neighborhoods are preserved in both low-resolution(LR) training set and high-resolution(HR) training set. However, due to the 'one-to-many' mapping between the LR image and HR ones in practice, the neighborhood relationship of the LR patch in LR space is quite different with that of the HR counterpart, that is to say the neighborhood relationship obtained is not true. In this paper, we explore a novel and effective re-identified K-nearest neighbor(RIKNN) method to search neighbors of LR patch. Compared with other methods, our method uses the geometrical information of LR manifold and HR manifold simultaneously. In particular, it searches K-NN of LR patch in the LR space and refines the searching results by re-identifying in the HR space, thus giving rise to accurate K-NN and improved performance. A statistical analysis of the influence of the training set size and nearest neighbor number is given, experimental results on some public face databases show the superiority of our proposed scheme over state-of-the-art face hallucination approaches in terms of subjective and objective results as well as computational complexity. | QU Shenming HU Ruimin CHEN Shihong JIANG Junjun WANG Zhongyuan ZHANG Maosheng | 2016 | China Communications2016，13，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员