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| 1 | 中国地震交变电磁场观测数据处理技术新进展显示文摘交变电磁场是对地震事件反应最灵敏的物理场之一,已观测到与地震有关大量的电磁场异常现象.随着人工源极低频电磁技术和卫星电磁观测技术在地震观测中被逐步应用研究,交变电磁场法用于地震观测的数据量呈数量级的增加,急需发展适于海量数据或大数据的信息处理和挖掘技术.本文介绍了自适应滤波技术及其在地面电磁场观测数据处理中的应用研究,以及小波分析技术在地面和卫星观测数据分析中的应用研究,表明在对实际测量数据处理中,自适应滤波技术可以有效识别天然源信号和人工源信号,并且提高了电磁场频谱和视电阻率计算的信噪比,小波分析等技术可以发现电磁异常现象与地震事件可能存在的相关性.这些技术可能成为对海量观测数据处理分析的有效方法. | 赵国泽 BI YaXin 王立凤 韩冰 汪晓 肖骑彬 蔡军涛 詹艳 陈小斌 汤吉 王继军 | 2015 | 中国科学:地球科学2015，45，1： | 12 |
| 2 | Advances in alternating electromagnetic field data processing for earthquake monitoring in China显示文摘The alternating electromagnetic(EM) field is one of the most sensitive physical fields related to earthquakes. There have been a number of publications reporting EM anomalies associated with earthquakes. With increasing applications and research of artificial-source extremely low frequency EM and satellite EM technologies in earthquake studies, the amount of observed data from the alternating EM method increases rapidly and exponentially, so it is imperative to develop suitable and effective methods for processing and analyzing the influx of big data. This paper presents research on the self-adaptive filter and wavelet techniques and their applications to analyzing EM data obtained from ground measurements and satellite observations, respectively. Analysis results show that the self-adaptive filter method can identify both natural- and artificial-source EM signals, and enhance the ratio between signal and noise of EM field spectra, apparent resistivity, and others. The wavelet analysis is capable of detecting possible correlation between EM anomalies and seismic events. These techniques are effective in processing and analyzing massive data obtained from EM observations. | ZHAO GuoZe BI YaXin WANG LiFeng HAN Bing WANG Xiao XIAO QiBin CAI JunTao ZHAN Yan CHEN XiaoBin TANG Ji WANG JiJun | 2015 | Science China Earth Sciences2015，58，2： | 7 |
| 3 | Earthquake Electromagnetic Precursor Anomalies Detected by a New Ground-based Observation Network显示文摘It is a debated topic if there are any observable precursor anomalies prior to the earthquake(EQ hereafter)and if the stronger EQ can be successfully predicted.During last few decades quite a lot of observable electromagnetic(EM)precursors were published by using techniques equipped in either satellites or on ground-based stations.But there are only a few cases that the shortterm precursor anomalies of EM field before earthquakes were observed by using alternate EM fields on ground.This paper will present a new EM observation network built in recent years and show a new finding of EM field with the variation of a one-year cycle observed using the network.As an example,the short-term precursor anomalies of apparent resistivity before the Yangbi EQ(Ms 5.1)occurred on March 27,2017 in Yunnan Province will be studied.The observed anomalous phenomena indicate that the anomaly before the EQ can be captured only if reasonable effective methods including sophisticated analytical techniques are used,and it is believed that continuously observed data on the fixed observation network for a long time is an effective means for studying anomalies that appeared before earthquakes.This network can also play an important role in studying the EM environment from space. | Bing HAN Guoze ZHAO Lifeng WANG Ji TANG Yaxin BI Yan ZHAN Xiaobin CHEN Qibin XIAO Jihong ZHANG | 2021 | Journal of Geodesy and Geoinformation Science2021，4，1： | 3 |
| 4 | Full-spectrum responsive photocatalytic activity via non-noble metal Bi decorated mulberry-like BiVO_(4)显示文摘Due to its appropriate bandgap(~2.4 e V)and efficient light absorption,bismuth vanadate(Bi VO_(4))shows promising photocatalysis activity.However,the charge carrier recombination and poor electron transmission often induce poor photocatalytic performance.Herein,we report a new method to in-situ synthesize non-noble metal Bi decorated mulberry-like Bi VO_(4)by a two-step calcination process.Comprehensive characterizations reveal that non-noble metal Bi nanoparticles grown in-situ on Bi VO_(4)result in the red-shift of the absorbance edge,greatly extending the light absorption from the ultraviolet into the near-infrared region.The surface plasmon resonance excitation of Bi nanoparticles and synergetic effects between Bi and Bi VO_(4)effectively improve the photocatalytic efficiency and promote the separation of photoinduced electron-hole pairs in mulberry-like Bi VO_(4).Density functional theory(DFT)calculation results further verify that the electrons are transferred from Bi to Bi VO_(4)and the formation of·OH radical in Bi/Bi VO_(4)is attributed to the lower simulated free energy,which supports our experimental outcomes.This work provides a novel strategy to enhance light absorption and promote efficient solar utilization of photocatalysts for practical applications. | Yaxin Bi Yanling Yang Xiao-Lei Shi Lei Feng Xiaojiang Hou Xiaohui Ye Li Zhang Guoquan Suo Siyu Lu Zhi-Gang Chen | 2021 | Journal of Materials Science & Technology2021，，24： | 2 |
| 5 | The linear combination data fusion method in information retrieval 显示文摘 | WU Shengli BI Yaxin ZENG Xiaoqin | 2011 | Lecture Notes in Computer Science2011，6861，： | 1 |
| 6 | On Combining Classifier Mass Functions for Text Categorization显示文摘 | David A Bell Guan J W Yaxin Bi | 2005 | IEEE transactions on knowledge and data engineering2005，17，10： | 1 |
| 7 | A rough set model with ontologies for discovering maximal association rules in document collections显示文摘 | BI Yaxin TERRY A MCCLEAN S | 2003 | Knowledge-Based Systems2003，16，56： | 1 |
| 8 | On Combining Classifier Mass Functions for Text Categorization显示文摘 | David A Bell J W Guan Yaxin Bi | 2005 | IEEE Transactions on Knowledge and Data Engineering2005，17，10： | 1 |
| 9 | On combining classifier mass functions for text categorization显示文摘 | Bell D A Guan J W Bi Yaxin | 2005 | IEEE Transactions on Knowledge and Data Engineering2005，17，10： | 1 |
| 10 | On Combining Classifier Mass Functions for Text Categorization 显示文摘 | David A Bell Guan J W Bi Yaxin | 2005 | IEEE transactions on knowledge and data engineering2005，17，10： | 1 |
| 11 | Automatic Anomaly Detection for Swarm Observations显示文摘The Swarm satellite mission was launched on 22 November 2013,it is the first European Space Agency’s constellation of three satellites,dedicated to monitoring geomagnetic field changes.The measurements delivered by the three satellites are very valuable for a range of applications,including the earthquake prediction study.However,for more than 5 years,relatively little advancement has been achieved in establishing a systematic approach for detecting anomalies from the satellite measurements for predicting earthquakes.This paper presents the challenges of developing a pragmatic framework for automatic anomaly detection and highlights innovative features of functional components developed.Through a case study we demonstrate a functionality pipeline of the system in detecting anomalies,and present our solutions to coping with data sparsity and parameter tuning as well as insights into the differences between discovering seismic anomalies from periodic and non-periodic data observed by the Swarm satellites. | Yaxin BI Vyron CHRISTODOULOU George WILKIE Guoze ZHAO Peter NICHOLL Mingjun HUANG Bin HAN Ji TANG | 2021 | Journal of Geodesy and Geoinformation Science2021，4，1： | 1 |
| 12 | Combining multiple classifiers using dempster's rule for text categorization显示文摘 | Bi Yaxin Bell D Wang Hui | 2007 | Applied Artificial Intelligence2007，21，3： | 1 |
| 13 | Product-cost modelling approach for the development of a decision support system for optimal roofing material selection显示文摘 | Sazzadur Rahman Henry Odeyinka Srinath Perera Yaxin Bi | 2012 | Expert Systems With Applications2012，，8： | 1 |
| 14 | A rough set model with ontologies for discovering maximal association rules in document collections显示文摘 | Bi Yaxin Anderson T McClean S | 2003 | Knowledge-Based Systems2003，16，： | 1 |
| 15 | Transplantation of human placental chorionic plate-derived mesenchymal stem cells for repair of neurological damage in neonatal hypoxic-ischemic encephalopathy显示文摘Neonatal hypoxic-ischemic encephalopathy is often associated with permanent cerebral palsy,neurosensory impairments,and cognitive deficits,and there is no effective treatment for complications related to hypoxic-ischemic encephalopathy.The therapeutic potential of human placental chorionic plate-derived mesenchymal stem cells for various diseases has been explored.However,the potential use of human placental chorionic plate-derived mesenchymal stem cells for the treatment of neonatal hypoxic-ischemic encephalopathy has not yet been investigated.In this study,we injected human placental chorionic plate-derived mesenchymal stem cells into the lateral ventricle of a neonatal hypoxic-ischemic encephalopathy rat model and observed significant improvements in both cognitive and motor function.Protein chip analysis showed that interleukin-3 expression was significantly elevated in neonatal hypoxic-ischemic encephalopathy model rats.Following transplantation of human placental chorionic plate-derived mesenchymal stem cells,interleukin-3 expression was downregulated.To further investigate the role of interleukin-3 in neonatal hypoxic-ischemic encephalopathy,we established an in vitro SH-SY5Y cell model of hypoxic-ischemic injury through oxygen-glucose deprivation and silenced interleukin-3 expression using small interfering RNA.We found that the activity and proliferation of SH-SY5Y cells subjected to oxygen-glucose deprivation were further suppressed by interleukin-3 knockdown.Furthermore,interleukin-3 knockout exacerbated neuronal damage and cognitive and motor function impairment in rat models of hypoxic-ischemic encephalopathy.The findings suggest that transplantation of hpcMSCs ameliorated behavioral impairments in a rat model of hypoxic-ischemic encephalopathy,and this effect was mediated by interleukin-3-dependent neurological function. | Lulu Xue Ruolan Du Ning Bi Qiuxia Xiao Yifei Sun Ruize Niu Yaxin Tan Li Chen Jia Liu Tinghua Wang Liulin Xiong | 2024 | Neural Regeneration Research2024，19，9： | 0 |
| 16 | Influences of the Fresh Air Volume on the Removal of Cough-Released Droplets in a Passenger Car of a High-Speed Train Using CFD显示文摘The spread and removal of pollution sources,namely,cough-released droplets in three different areas(front,middle,and rear areas)of a fully-loaded passenger car in a high-speed train under different fresh air flow volume were studied using computational fluid dynamics(CFD)method.In addition,the structure of indoor flow fields was also analysed.The results show that the large eddies are more stable and flow faster in the air supply under Mode 2(fresh air volume:2200m3/h)compared to Mode 1(fresh air volume:1100m3/h).By analysing the spreading process of droplets sprayed at different locations in the passenger car and with different particle sizes,the removal trends for droplets are found to be similar under the two air supply modes.However,when increasing the fresh air flow volume,the droplets in the middle and front areas of the passenger car are removed faster.When the droplets had dispersed for 60s,Mode 2 exhibited a removal rate approximately 1%–3%higher than Mode 1 for small and medium-sized droplets with diameters of 10 and 50μm.While those in the rear area,the situation is reversed,with Mode 1 slightly surpassing Mode 2 by 1%–3%.For large droplets with a diameter of 100μm,both modes achieved a removal rate of over 96%in all three regions at the 60 s.The results can provide guidance for air supply modes of passenger cars of high-speed trains,thus suppressing the spread of virus-carrying droplets and reducing the risk of viral infection among passengers. | Jun Xu Kai Bi Yibin Lu TiantianWang Hang Zhang Zeyuan Zheng Fushan Shi Yaxin Zheng Xiaoying Li Jingping Yang | 2024 | Computer Modeling in Engineering & Sciences2024，138，3： | 0 |
| 17 | Satellite detection of IR precursors using bi-angular advanced along-track scanning radiometer data:a case study of Yushu earthquake显示文摘The paper has developed and proposed a synthesis analysis method based on the robust satellite data analysis technique(RST) to detect seismic anomalies within the bi-angular advanced along-track scanning radiometer(AATSR) gridded brightness temperature(BT)data based on spatial/temporal continuity analysis. The proposed methods have been applied to analyze the Yushu(Qinghai, China) earthquake occurred on 14 th April 2010,and a full AATSR data-set of 8 years data from March2003 to May 2010 with longitude from 91°E to 101°E and latitude from 28°N to 38°N has been analyzed. Combining with the tectonic explanation of spatial and temporal continuity of the abnormal phenomena, the analyzed results indicate that the infrared radiation anomalies detected by the AATSR BT data with nadir view appear and enhance gradually along with the development and occurring of the earthquake, especially along the Ganzi-Yushu fault, Nu River fault and Jiali-Chayu fault; more infrared anomalies along the earthquake fault zone(Lancangjiang fault and Ning Karma Monastery-Deqin fault) are detected using the proposed synthesis analysis method, which can also characterize the activity of seismic faults more precisely. | Pan Xiong Xuhui Shen Xingfa Gu Qingyan Meng Yaxin Bi Liming Zhao Yanhua Zhao Yan Li Jianting Dong | 2015 | Earthquake Science2015，28，1： | 0 |
| 18 | Polyketides with potential bioactivities from the mangrove‑derived fungus Talaromyces sp.WHUF0362显示文摘Metabolites of microorganisms have long been considered as potential sources for drug discovery.In this study,fve new depsidone derivatives,talaronins A-E(1-5)and three new xanthone derivatives,talaronins F-H(6-8),together with 16 known compounds(9-24),were isolated from the ethyl acetate extract of the mangrove-derived fungus Talaromyces species WHUF0362.The structures were elucidated by analysis of spectroscopic data and chemical methods including alkaline hydrolysis and Mosher’s method.Compounds 1 and 2 each attached a dimethyl acetal group at the aromatic ring.A putative biogenetic relationship of the isolated metabolites was presented and suggested that the depsidones and the xanthones probably had the same biosynthetic precursors such as chrysophanol or rheochrysidin.The antimicrobial activity assay indicated that compounds 5,9,10,and 14 showed potent activity against Helicobacter pylori with minimum inhibitory concentration(MIC)values in the range of 2.42-36.04μmol/L.While secalonic acid D(19)demonstrated signifcant antimicrobial activity against four strains of H.pylori with MIC values in the range of 0.20 to 1.57μmol/L.Furthermore,secalonic acid D(19)exhibited cytotoxicity against cancer cell lines Bel-7402 and HCT-116 with IC_(50) values of 0.15 and 0.19μmol/L,respectively.The structure–activity relationship of depsidone derivatives revealed that the presence of the lactone ring and the hydroxyl at C-10 was crucial to the antimicrobial activity against H.pylori.The depsidone derivatives are promising leads to inhibit H.pylori and provide an avenue for further development of novel antibiotics. | Huawei Lv Haibo Su Yaxin Xue Jia Jia Hongkai Bi Shoubao Wang Jinkun Zhang Mengdi Zhu Mahmoud Emam Hong Wang Kui Hong Xing-Nuo Li | 2023 | Marine Life Science & Technology2023，5，2： | 0 |
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