|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Rapid report of the 8 January 2022 M_(S)6.9 Menyuan earthquake,Qinghai,China显示文摘The M_(S)6.9 Menyuan earthquake in Qinghai Province,west China is the largest earthquake by far in 2022.The earthquake occurs in a tectonically active region,with a background b-value of 0.87 within 100 km of the epicenter that we derived from the unified catalog produced by China Earthquake Networks Center since late 2008.Field surveys have revealed surface ruptures extending 22 km along strike,with a maximum ground displacement of 2.1 m.We construct a finite fault model with constraints from In SAR observations,which showed multiple fault segments during the Menyuan earthquake.The major slip asperity is confined within 10 km at depth,with the maximum slip of 3.5 m.Near real-time back-projection results of coseismic radiation indicate a northwest propagating rupture that lasted for~10 s.Intensity estimates from the back-projection results show up to a Mercalli scale of IX near the ruptured area,consistent with instrumental measurements and the observations from the field surveys.Aftershock locations(up to January 21,2022)exhibit two segments,extending to~20 km in depth.The largest one reaches M_(S)5.3,locating near the eastern end of the aftershock zone.Although the location and the approximate magnitude of the mainshock had been indicated by previous studies based on paleoearthquake records and seismic gap,as well as estimated stressing rate on faults,significant surfacebreaching rupture leads to severe damage of the high-speed railway system,which poses a challenge in accurately assessing earthquake hazards and risks,and thus demands further investigations of the rupture behaviors for crustal earthquakes. | Hongfeng Yang Dun Wang Rumeng Guo Mengyu Xie Yang Zang Yue Wang Qiang Yao Chuang Cheng Yanru An Yingying Zhang | 2022 | Earthquake Research Advances2022，2，1： | 14 |
| 2 | Myeloid-specific targeting of Notch ameliorates murine renal fibrosis via reduced infiltration and activation of bone marrowderived macrophage显示文摘Macrophages play critical roles in renal fibrosis.However,macrophages exhibit ontogenic and functional heterogeneities,and which population of macrophages contributes to renal fibrosis and the underlying mechanisms remain unclear.In this study,we genetically targeted Notch signaling by disrupting the transcription factor recombination signal binding protein-JK(RBP-J),to reveal its role in regulation of macrophages during the unilateral ureteral obstruction(UUO)-induced murine renal fibrosis.Myeloid-specific disruption of RBP-J attenuated renal fibrosis with reduced extracellular matrix deposition and myofibroblast activation,as well as attenuated epithelial-mesenchymal transition,likely owing to the reduced expression of TGF-β.Mean while,RBP-J deletion significantly hampered macrophage infiltration and activation in fibrotic kidney,although their proliferation appeared unaltered.By using macrophage clearance experiment,we found that kidney resident macrophages made negligible contribution,but bone marrow(BM)-derived macrophages played a major role in renal fibrogenesis.Further mechanistic analyses showed that Notch blockade reduced monocyte emigration from BM by down-regulating CCR2 expression.Finally,we found that myeloid-specific Notch activation aggravated renal fibrosis,which was mediated by CCR2^+macrophages infiltration.In summary,our data have unveiled that myeloid-specific targeting of Notch could ameliorate renal fibrosis by regulating BM-derived macrophages recruitment and activation,providing a novel strategy for intervention of this disease. | Yali Jiang Yuanyuan Wang Pengfei Ma Dongjie An Junlong Zhao Shiqian Liang Yuchen Ye Yingying Lu Peng Zhang Xiaowei Liu Hua Han Hongyan Qin | 2019 | Protein & Cell2019，10，3： | 10 |
| 3 | Efficient visible light photo-Fenton-like degradation of organic pollutants using in situ surface-modified BiFeO_3 as a catalyst显示文摘The visible light photo-Fenton-like catalytic performance of BiFeO3 nanoparticles was investigated using Methyl Violet(MV),Rhodamine B(RhB) and phenol as probes.Under optimum conditions,the pseudo first-order rate constant(k) was determined to be 2.21 × 102,5.56 × 102 and 2.01 × 102 min 1 for the degradation of MV(30 μmol/L),RhB(10 μmol/L) and phenol(3 mmol/L),respectively,in the BiFeO3-H2O2-visible light(Vis) system.The introduction of visible light irradiation increased the k values of MV,RhB and phenol degradation 3.47,1.95 and 2.07 times in comparison with those in dark.Generally,the k values in the BiFeO3H2O2-Vis system were accelerated by increasing BiFeO3 load and H2O2 concentration,but decreased with increasing initial pollutant concentration.To further enhance the degradation of pollutants at high concentrations,BiFeO3 was modified with the addition of surface modifiers.The addition of ethylenediamineteraacetic acid(EDTA,0.4 mmol/L) increased the k value of MV degradation(60 μmol/L) from 1.01 × 102 min-1 in the BiFeO 3-H2O2-Vis system to 1.30 min-1 in the EDTA-BiFeO3-H2O2-Vis system by a factor of 128.This suggests that in situ surface modification can enable BiFeO3 nano-particles to be a promising visible light photo-Fenton-like catalyst for the degradation of organic pollutants. | Junjian An Lihua Zhu Yingying Zhang Heqing Tang | 2013 | Journal of Environmental Sciences2013，25，6： | 10 |
| 4 | Analysis of Commonly and Specifically Dysregulated Pathways in Three Women Cancers显示文摘Breast, ovarian and endometrial cancer are three most prevalent gynaecological malignancies. Identifying their common and specific biomarkers is significant for cancer prediction and therapy in females. We propose a method to identify dysregulated pathways in cancer through scoring pathways based on the molecular interaction data and genomic data. Commonly and specifically dysregulated pathways are analyzed across the above three female cancers, which have not been studied as a whole to the best of our knowledge. Our results demonstrate that all the three cancers have close relationships with Type II diabetes and cell cycle-related biology processes. Breast cancer is specifically related to immune system while ovarian cancer and endometrial cancer are associated with blood vascular-related systems such as renin-angiotensin system and coagulation system. In addition, dysregulated pathways are used to predict potential driver genes effectively according to their topological structure and biological information. | LIU Xiyang AN Yingying YU Baoguo QIN Guimin | 2018 | Chinese Journal of Electronics2018，27，5： | 4 |
| 5 | Elimination of a Retrotransposon for Quenching Genome Instability in Modern Rice显示文摘Transposable elements(TEs)constitute the most abundant portions of plant genomes and can dramatically shape host genomes during plant evolution.They also play important roles in crop domestication.However,whether TEs themselves are also selected during crop domestication has remained unknown.Here,we identify an active long terminal repeat(LTR)retrotransposon,HUO,as a potential target of selection during rice domestication and breeding.HUO is a low-copy-number LTR retrotransposon,and is active under natural growth conditions and transmitted through male gametogenesis,preferentially inserting into genomic regions capable of transcription.HUO exists in all wild rice accessions and about half of the archaeological rice grains(1200–7000 years ago)and landraces surveyed,but is absent in almost all modern varieties,indicating its gradual elimination during rice domestication and breeding.Further analyses showed that HUO is subjected to strict gene silencing through the RNA-directed DNA methylation pathway.Our results also suggest that multiple HUO copies may trigger genomic instability through altering genome-wide DNA methylation and small RNA biogenesis and changing global gene expression,resulting in decreased disease resistance and yield,coinciding with its elimination during rice breeding.Together,our study suggests that negative selection of an active retrotransposon might be important for genome stability during crop domestication and breeding. | Yu Peng Yingying Zhang Yijie Gui Dong An Junzhong Liu Xun Xu Qun Li Junmin Wang Wen Wang Chunhai Shi Longjiang Fan Baorong Lu Yiwen Deng Sheng Teng Zuhua He | 2019 | Molecular Plant2019，12，10： | 2 |
| 6 | Preliminary report of the September 5,2022 M_(S) 6.8 Luding earthquake,Sichuan,China显示文摘The 2022 M_(S)6.8 Luding earthquake is the strongest earthquake in Sichuan Province, Western China, since the 2017 M_(S)7.0 Jiuzhaigou earthquake. It occurred on the Moxi fault in the southeastern segment of the Xianshuihe fault, a tectonically active and mountainous region with severe secondary earthquake disasters. To better understand the seismogenic mechanism and provide scientific support for future hazard mitigation, we summarize the preliminary results of the Luding earthquake, including seismotectonic background, seismicity and mainshock source characteristics and aftershock properties, and direct and secondary damage associated with the mainshock.The peak ground displacements in the NS and EW directions observed by the nearest GNSS station SCCM are ~35 mm and ~55 mm, respectively, resulting in the maximum coseismic dislocation of 20 mm along the NWW direction, which is consistent with the sinistral slip on the Xianshuihe fault. Back-projection of teleseismic P waves suggest that the mainshock rupture propagated toward south-southeast. The seismic intensity of the mainshock estimated from the back-projection results indicates a Mercalli scale of Ⅷ or above near the ruptured area,consistent with the results from instrumental measurements and field surveys. Numerous aftershocks were reported, with the largest being M_(S)4.5. Aftershock locations(up to September 18, 2022) exhibit 3 clusters spanning an area of 100 km long and 30 km wide. The magnitude and rate of aftershocks decreased as expected, and the depths became shallower with time. The mainshock and two aftershocks show left-lateral strike-slip focal mechanisms. For the aftershock sequence, the b-value from the Gutenberg-Richter frequency-magnitude relationship, h-value, and p-value for Omori’s law for aftershock decay are 0.81, 1.4, and 1.21, respectively, indicating that this is a typical mainshock-aftershock sequence. The low b-value implies high background stress in the hypocenter region. Analysis from remote sensing satellite images and UAV data shows that the distribution of earthquake-triggered landslides was consistent with the aftershock area. Numerous small-size landslides with limited volumes were revealed, which damaged or buried the roads and severely hindered the rescue process. | Yanru An Dun Wang Qiang Ma Yueren Xu Yu Li Yingying Zhang Zhumei Liu Chunmei Huang Jinrong Su Jilong Li Mingxiao Li Wenkai Chen Zhifan Wan Dengjie Kang Baoshan Wang | 2023 | Earthquake Research Advances2023，3，1： | 1 |
| 7 | Model predictive control of grid-connected PV power generation system considering optimal MPPT control of PV modules显示文摘Because of system constraints caused by the external environment and grid faults,the conventional maximum power point tracking(MPPT)and inverter control methods of a PV power generation system cannot achieve optimal power output.They can also lead to misjudgments and poor dynamic performance.To address these issues,this paper proposes a new MPPT method of PV modules based on model predictive control(MPC)and a finite control set model predictive current control(FCS-MPCC)of an inverter.Using the identification model of PV arrays,the module-based MPC controller is designed,and maximum output power is achieved by coordinating the optimal combination of spectral wavelength and module temperature.An FCS-MPCC algorithm is then designed to predict the inverter current under different voltage vectors,the optimal voltage vector is selected according to the optimal value function,and the corresponding optimal switching state is applied to power semiconductor devices of the inverter.The MPPT performance of the MPC controller and the responses of the inverter under different constraints are verified,and the steady-state and dynamic control effects of the inverter using FCS-MPCC are compared with the traditional feedforward decoupling PI control in Matlab/Simulink.The results show that MPC has better tracking performance under constraints,and the system has faster and more accurate dynamic response and flexibility than conventional PI control. | Yingying Zhao Aimin An Yifan Xu Qianqian Wang Minmin Wang | 2021 | Protection and Control of Modern Power Systems2021，6，1： | 1 |
| 8 | Chromosomal deletions and inversions mediated by TALENs and CRISPR/Cas in zebrafish显示文摘 | An Xiao Zhanxiang Wang Yingying Hu Yingdan Wu Zhou Luo Zhipeng Yang Yao Zu Wenyuan Li Peng Huang Xiangjun Tong Zuoyan Zhu Shuo Lin Bo Zhang | 2013 | Nucleic Acids Research2013，，14： | 1 |
| 9 | A novel and low-toxic peptide DR3penA alleviates pulmonary fibrosis by regulating the MAPK/miR-23b-5p/AQP5 signaling axis显示文摘Pulmonary fibrosis(PF)is a pathological change caused by repeated injuries and repair dysfunction of the alveolar epithelium.Our previous study revealed that the residues Asn3 and Asn4 of peptide DR8(DHNNPQIR-NH_(2))could be modified to improve stability and antifibrotic activity,and the unnatural hydrophobic amino acids a-(4-pentenyl)-Ala and D-Ala were considered in this study.DR3penA(DHa-(4-pentenyl)-ANPQIR-NH_(2))was verified to have a longer half-life in serum and to significantly inhibit oxidative damage,epithelial-mesenchymal transition(EMT)and fibrogenesis in vitro and in vivo.Moreover,DR3penA has a dosage advantage over pirfenidone through the conversion of drug bioavailability under different routes of administration.A mechanistic study revealed that DR3penA increased the expression of aquaporin 5(AQP5)by inhibiting the upregulation of miR-23b-5p and the mitogen-activated protein kinase(MAPK)pathway,indicating that DR3penA may alleviate PF by regulating MAPK/miR-23b-5p/AQP5.Safety evaluation showed that DR3penA is a peptide drug without obvious toxicity or acute side effects and has significantly improved safety compared to DR8.Thus,our findings suggest that DR3penA,as a novel and low-toxic peptide,has the potential to be a leading compound for PF therapy,which provides a foundation for the development of peptide drugs for fibrosis-related diseases. | Dan Wang Bochuan Deng Lu Cheng Jieru Li Jiao Zhang Xiang Zhang Xiaomin Guo Tiantian Yan Xin Yue Yingying An Bangzhi Zhang Wenle Yang Junqiu Xie Rui Wang | 2023 | Acta Pharmaceutica Sinica B2023，13，2： | 0 |
| 10 | Dietary lysozyme improves growth performance and intestinal barrier function of weaned piglets显示文摘Lysozyme(LZ)is a purely natural,nonpolluting and nonspecific immune factor,which has beneficial effects on the healthy development of animals.In this study,the influences of LZ on the growth performance and intestinal barrier of weaned piglets were studied.A total of 48 weaned piglets(Landrace×Yorkshire,22 d old)were randomly divided into a control group(basal diet)and a LZ group(0.1%LZ diet)for 19 d.The results showed that LZ could significantly improve the average daily gain(ADG,P<0.05)and average daily feed intake(ADFI,P<0.05).LZ also improved the intestinal morphology and significantly increased the expression of occludin in the jejunum(P<0.05).In addition,LZ down-regulated the expression of interleukin-1β(IL-1β,P<0.05)and tumor necrosis factor-a(TNF-a,P<0.05),and inhibited the expression of the genes in the nuclear factor-k-gene binding(NF-κB,P<0.05)signaling pathway.More importantly,the analysis of intestinal flora showed LZ increased the abundance of Firmicutes(P<0.05)and the ratio of Firmicutes to Bacteroidota(P=0.09)at the phylum level,and increased the abundance of Clostridium_sensu_stricto_1(P<0.05)and reduced the abundance of Olsenella and Prevotella(P<0.05)at the genus level.In short,this study proved that LZ could effectively improve the growth performance,relieve inflammation and improve the intestinal barrier function of weaned piglets.These findings provided an important theoretical basis for the application of LZ in pig production. | Yuying Wu Bei Cheng Longxiang Ji Xiangyun Lv Yingying Feng Liu’an Li Xin Wu | 2023 | Animal Nutrition2023，，3： | 0 |
| 11 | A Novel Aquila Optimizer Based PV Array Reconfiguration Scheme to Generate Maximum Energy under Partial Shading Condition显示文摘This paper develops a real-time PV arrays maximum power harvesting scheme under partial shading condition(PSC)by reconfiguring PV arrays using Aquila optimizer(AO).AO is based on the natural behaviors of Aquila in capturing prey,which can choose the best hunting mechanism ingeniously and quickly by balancing the local exploitation and global exploration via four hunting methods of Aquila:choosing the searching area through high soar with the vertical stoop,exploring in different searching spaces through contour flight with quick glide attack,exploiting in convergence searching space through low flight with slow attack,and swooping through walk and grabbing prey.In general,PV arrays reconfiguration is a problem of discrete optimization,thus a series of discrete operations are adopted in AO to enhance its optimization performance.Simulation results based on 10 cases under PSCs show that the mismatched power loss obtained by AO is the smallest compared with genetic algorithm,particle swarm optimization,ant colony algorithm,grasshopper optimization algorithm,and butterfly optimization algorithm,which reduced by 4.34%against butterfly optimization algorithm. | Dong An Junqing Jia Wenchao Cai Deyu Yang Chao Lv Jiawei Zhu Yingying Jiao | 2022 | Energy Engineering2022，119，4： | 0 |
| 12 | Relocation of the MS 5.7 Earthquake Sequence in Songyuan,Jilin Province,2018 and the Analysis of Its Seismogenic Structure显示文摘The 2018,Songyuan,Jilin M_S5. 7 earthquake occurred at the intersection of the FuyuZhaodong fault and the Second Songhua River fault. The moment magnitude of this earthquake is M_W5. 3,the centroid depth by the waveform fitting is 12 km,and it is a strike-slip type event. In this paper,with the seismic phase data provided by the China Earthquake Network, the double-difference location method is used to relocate the earthquake sequence,finally the relocation results of 60 earthquakes are obtained. The results show that the aftershock zone is about 4. 3km long and 3. 1km wide,which is distributed in the NE direction. The depth distribution of the seismic sequence is 9km-10 km. 1-2 days after the main shock,the aftershocks were scattered throughout the aftershock zone,and the largest aftershock occurred in the northeastern part of the aftershock zone. After 3-8 days,the aftershocks mainly occurred in the southwestern part of the aftershock zone. The profile distribution of the earthquake sequence shows that the fault plane dips to the southeast with the dip angle of about 75°. Combined with the regional tectonic setting,focal mechanism solution and intensity distribution,we conclude that the concealed fault of the Fuyu-Zhaodong fault is the seismogenic fault of the Songyuan M_S5. 7 earthquake. This paper also relocates the earthquake sequence of the previous magnitude 5. 0 earthquake in 2017. Combined with the results of the focal mechanism solution,we believe that the two earthquakes have the same seismogenic structure,and the earthquake sequence generally develops to the southwest. The historical seismic activity since 2009 shows that after the magnitude 5. 0 earthquake in 2017,the frequency and intensity of earthquakes in the earthquake zone are obviously enhanced,and attention should be paid to the development of seismic activity in the southwest direction of the earthquake zone. | An Yanru Zhang Yingying Yang Zhigao Bai Lanshu Liu Jie | 2018 | Earthquake Research in China2018，32，4： | 0 |
| 13 | circ-BPTF serves as a miR-486-5p sponge to regulate CEMIP and promotes hypoxic pulmonary arterial smooth muscle cell proliferation in COPD显示文摘Hypoxia plays a crucial role in pulmonary vascular remodelling at the early stage of chronic obstructive pulmonary disease(COPD).Circle RNA(circRNA)has been identified to play a critical role in multiple diseases.However,the role of circRNAs in pulmonary vascular remodelling in COPD remains unclear.In this study,we aim to investigate the role of circRNAs in pulmonary arterial smooth muscle cell proliferation and pulmonary vascular remodelling in COPD.COPD patients show lower partial pressure of arterial oxygen and pulmonary arterial remodeling as compared with controls.circRNA microarray and real-time PCR analyses show significantly higher level of circ-BPTF and lower miR-486-5p level in the pulmonary arteries of COPD patients as compared with controls.Hypoxia suppresses miR-486-5p expression but promotes expressions of circ-BPTF and cell migration inducing protein(CEMIP)in human pulmonary arterial smooth muscle cells(PASMCs)in vitro.Loss-and gain-of-function experiments show that circ-BPTF promotes PASMC proliferation in vitro.Moreover,luciferase reporter assay results indicate that circ-BPTF regulates PASMC proliferation by acting as an miR-486-5p sponge.CEMIP is identified as a candidate target gene of miR-486-5p by luciferase reporter assay.Overall,our study shows that circ-BPTF serves as a miR-486-5p sponge to regulate CEMIP and promote hypoxic PASMC proliferation in pulmonary vascular remodelling in COPD. | Changguo Wang Yingying Liu Weiyun Zhang Jian’an Huang Junhong Jiang Ran Wang Daxiong Zeng | 2023 | Acta Biochimica et Biophysica Sinica2023，55，3： | 0 |
| 14 | Dataset of Comparative Observations for Land Surface Processes over the Semi-Arid Alpine Grassland against Alpine Lakes in the Source Region of the Yellow River显示文摘Thousands of lakes on the Tibetan Plateau(TP) play a critical role in the regional water cycle, weather, and climate. In recent years, the areas of TP lakes underwent drastic changes and have become a research hotspot. However, the characteristics of the lake-atmosphere interaction over the high-altitude lakes are still unclear, which inhibits model development and the accurate simulation of lake climate effects. The source region of the Yellow River(SRYR) has the largest outflow lake and freshwater lake on the TP and is one of the most densely distributed lakes on the TP. Since 2011,three observation sites have been set up in the Ngoring Lake basin in the SRYR to monitor the lake-atmosphere interaction and the differences among water-heat exchanges over the land and lake surfaces. This study presents an eight-year(2012–19), half-hourly, observation-based dataset related to lake–atmosphere interactions composed of three sites. The three sites represent the lake surface, the lakeside, and the land. The observations contain the basic meteorological elements,surface radiation, eddy covariance system, soil temperature, and moisture(for land). Information related to the sites and instruments, the continuity and completeness of data, and the differences among the observational results at different sites are described in this study. These data have been used in the previous study to reveal a few energy and water exchange characteristics of TP lakes and to validate and improve the lake and land surface model. The dataset is available at National Cryosphere Desert Data Center and Science Data Bank. | Xianhong MENG Shihua LYU Zhaoguo LI Yinhuan AO Lijuan WEN Lunyu SHANG Shaoying WANG Mingshan DENG Shaobo ZHANG Lin ZHAO Hao CHEN Di MA Suosuo LI Lele SHU Yingying AN Hanlin NIU | 2023 | Advances in Atmospheric Sciences2023，40，6： | 0 |
| 15 | HDAC3在核心昼夜节律负反馈环中两种不同的作用对生物钟功能至关重要显示文摘组蛋白去乙酰化酶(HDAC)是一类蛋白酶,对染色体的结构修饰和基因表达调控有重要的作用。一般情况下,组蛋白的乙酰化有利于DNA与组蛋白八聚体的解离,核小体结构松弛,从而使各种转录因子和协同转录因子能与DNA结合位点特异性结合,激活基因的转录。 | Guangsen Shi Pancheng Xie Zhipeng Qu Zhihui Zhang Zhen Dong Yang An Lijuan Xing Zhiwei Liu Yingying Dong Guoqiang Xu Ling Yang Yi Liu 徐璎 | 2017 | 科学新闻2017，19，4： | 0 |
| 16 | Universal 4-qualifiable fluorene-based building blocks for potential optoelectronic applications显示文摘In the design of conjugated molecules,modular production enables materials to easily realize structure modification and precisely tune their photoelectrical property.Construction of a novel and universal building block is crucial to design and manufacture high performance and stable conjugated molecules for optoelectronic application.Herein,we originally demonstrated a universal 4-qualifiable fluorene-based building block,which is a fundamental molecular segment to functionalize and obtain novel conjugated materials.Compared to the traditional modification at 9-site,additional 4-position functionalization provided an exciting blueprint to not only tune electronic structure and excited state via p-n molecular design engineering and space charge-transfer strategy,but also allow for optimizing intermolecular arrangement and obtaining solution-processing ability.The introduction of the 4-site substituent in fluorene based semiconductors may endow materials with unique properties.Finally,we successfully prepared two stable deep-blue light-emitting conjugated polymer,PODOPF and PODOF,by utilizing the 4-substituent fluorene based building block.It is believable that the performance,stability and processibility of reported outstanding fluorene-based conjugated molecules can be further optimized based on this universal building block. | Xiang An Jinghao Yang Man Xu Lili Sun Lubing Bai Kai Wang Zhiqiang Zhuo Yingying Zheng Jinyi Lin Xuehua Ding Yuyu Liu Linghai Xie Chengrong Yin Wei Huang | 2022 | Chinese Chemical Letters2022，33，12： | 0 |
| 17 | Controls on the Northward Movement of the ITCZ over the South China Sea in Autumn:A Heavy Rain Case Study显示文摘The autumn Intertropical Convergence Zone(ITCZ)over the South China Sea(SCS)is typically held south of 10°N by prevailing northeasterly and weakening southwesterly winds.However,the ITCZ can move north,resulting in heavy rainfall in the northern SCS(NSCS).We investigate the mechanisms that drove the northward movement of the ITCZ and led to heavy non-tropical-cyclone rainfall over the NSCS in autumn of 2010.The results show that the rapid northward movement of the ITCZ on 1 and 2 October was caused by the joint influence of the equatorial easterlies(EE),southwesterly winds,and the easterly jet(EJ)in the NSCS.A high pressure center on the east side of Australia,strengthened by the quasi-biweekly oscillation and strong Walker circulation,was responsible for the EE to intensify and reach the SCS.The EE finally turned southeast and together with enhanced southwesterly winds associated with an anticyclone,pushed the ITCZ north.Meanwhile,the continental high moved east,which reduced the area of the EJ in the NSCS and made room for the ITCZ.Further regression analysis showed that the reduced area of the EJ and increased strength of the EE contributed significantly to the northward movement of the ITCZ.The enhancement of the EE preceded the northward movement of the ITCZ by six hours and pushed the ITCZ continually north.As the ITCZ approached 12°N,it not only transported warm moist air but also strengthened the dynamic field by transporting the positive vorticity horizontally and vertically which further contributed to the heavy rainfall. | Fei WANG Lifang SHENG Xiadong AN Qian LIU Haixia ZHOU Yingying ZHANG Jianping LI | 2021 | Advances in Atmospheric Sciences2021，38，10： | 0 |
| 18 | Application on Anomaly Detection of Geoelectric Field Based on Deep Learning显示文摘The deep learning method has made nurnerials achievements regarding anomaly detection in the field of time series.We introduce the speech production model in the field of artificial intelligence,changing the convolution layer of the general convolution neural network to the residual element structure by adding identity mapping,and expanding the receptive domain of the model by using the dilated causal convolution.Based on the dilated causal convolution network and the method of log probability density function,the anomalous events are detected according to the anomaly scores.The validity of the method is verified by the simulation data,which is applied to the actual observed data on the observation staion of Pingliang geoeletric field in Gansu Province.The results show that one month before the Wenchuan M_S8.0,Lushan M_S7.0 and Minxian-Zhangxian M_S6.6 earthquakes,the daily cumulative error of log probability density of the predicted results in Pingliang Station suddenly decreases,which is consistent with the actual earthquake anomalies in a certain time range.After analyzing the combined factors including the spatial electromagnetic environment and the variation of micro fissures before the earthquake,we explain the possible causes of the anomalies in the geoelectric field of before the earthquake.The successful application of deep learning in observed data of the geoelectric field may behefit for improving the ultilization rate both the data and the efficiency of detection.Besides,it may provide technical support for more seismic research. | WEI Lei AN Zhanghui FAN Yingying CHEN Quan YUAN Lihua HOU Zeyu | 2020 | Earthquake Research in China2020，34，3： | 0 |
| 19 | The Impact of an Abnormal Zonal Vertical Circulation in Autumn of Super El Ni?o Years on Non-tropical-cyclone Heavy Rainfall over Hainan Island显示文摘This study reveals a significant positive connection between autumn non-tropical-cyclone heavy rainfall on Hainan Island and the intensity of Eastern Pacific(EP)El Ni?o events.That is,the amount of rainfall in super EP El Ni?o years is more than that in normal EP El Ni?o years.Comparing EP El Ni?o years of different intensities,the cooler sea surface temperature in the northwestern Pacific during super EP El Ni?o years stimulates a negative surface latent heat flux(LHF)anomaly and abnormal anticyclonic circulation at 850 hPa.Under these conditions,an abnormal zonal vertical circulation develops in the northern South China Sea once a positive LHF anomaly and abnormal cyclonic circulation(ACC)at 850hPa occur in the Beibu Gulf.The abnormal zonal vertical circulation further strengthens the ascending motion over Hainan Island,as the critical factor that leads to excessive rainfall.Further analysis shows that the positive LHF anomaly,which can be attributed to the increased latent heat transfer which resulted from the increased surface wind speed,is an important trigger for the ACC.However,the ACC is also the supplier of favorable moisture conditions because it intensifies vapor convergence over Hainan Island and meridionally transports moisture from the South China Sea to northeastern Hainan Island,thereby generating heavy rainfall.This paper emphasizes that the impact of El Ni?o events,especially super El Ni?o events,on rainfall over Hainan Island cannot be ignored,even if the traditional view is that frequent rainfall occurs mainly in La Ni?a years. | Fei WANG Lifang SHENG Xiadong AN Haixia ZHOU Yingying ZHANG Xiaodong LI Yigeng DING Jing YANG | 2022 | Advances in Atmospheric Sciences2022，39，11： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员