478 Hits in 1.6 sec

On Schur Algebras and Derivations of Free Lie Algebras [article]

Frederick Cohen, Mohamed Elhamdadi, Tao Jin, Minghui Liu
2022 arXiv   pre-print
The paper is mainly based on the thesis of Jin Tao [20] . The article is organized as follows: In Section 2, we recall the necessary ingredients needed for the rest of the paper.  ... 
arXiv:2206.03548v1 fatcat:vwbpqf3pjndlbdhen6dtlhzwhm

Reversal of Aerosol Properties in Eastern China with Rapid Decline of Anthropogenic Emissions

Minghui Tao, Lili Wang, Liangfu Chen, Zifeng Wang, Jinhua Tao
2020 Remote Sensing  
The clean air actions of the Chinese government since 2013 have led to rapid reduction in anthropogenic emissions during the last five years. In this study, we present a regional-scale insight into the transition of aerosol properties during this special period based on integrated Moderate Resolution Imaging Spectroradiometer (MODIS), Multi-angle Imaging Spectroradiometer (MISR), and ground-based AERONET (AErosol RObotic NETwork) observations. As a response, aerosols in eastern China have
more » ... ted notable reversal in both the amount and optical properties. Regional haze pollution with Aerosol Optical Depth (AOD) > 1.0 in northern China declined from more than ~80 days per year to less than ~30 days. While fine-mode particles exhibited a continuous decrease by ~30-40% during the time period of 2013–2018, the levels of coarse aerosols had no regular variations. MISR fraction AOD of different size modes shows that there has been an obvious overall decline in coarse particles over eastern China, but natural sources such as long-range dust transport make a considerable contribution. The Single Scattering Albedo (SSA) increased steadily from 2001 to 2012 by more than ~0.05. In contrast, aerosol absorption has been getting stronger since 2013, with SSA increasing by ~0.03, due to a much larger reduction in sulfate and nitrate. The drastic transition of aerosol properties has greatly changed aerosol radiative forcing (ARF) in eastern China. The negative ARF at the top (TOA) and bottom (BOA) of the atmosphere decreased by ~30 and ~50 W/m2, respectively, in Beijing during the 2001–2012 period. Although aerosol loading continued to decline after 2013, the magnitudes of TOA and BOA ARF have increased by ~10 and ~30 W/m2, respectively, since 2013, due largely to the enhanced aerosol absorption. Our results suggest that more comprehensive observations are needed to improve understanding of the intense climate and environment effects of dramatic aerosol properties in eastern China.
doi:10.3390/rs12030523 fatcat:qlijuu7iajfmxe4zctv7mpe7q4

An empirical method of RH correction for satellite estimation of ground-level PM concentrations

Zifeng Wang, Liangfu Chen, Jinhua Tao, Yang Liu, Xuefei Hu, Minghui Tao
2014 Atmospheric Environment  
h i g h l i g h t s It characterizes the aerosol hygroscopicity only using in-situ visibility, RH and PM. Able to account for the spatio-temporal variations of aerosol types and properties. Correlations between satellite AOD and PM are greatly improved by RH correction. Significantly extends the spatial and temporal coverage of accurate RH correction.
doi:10.1016/j.atmosenv.2014.05.030 fatcat:w6qayih5wfcszaq5ajhl2hb47a

Remote cerebellar hemorrhage after supratentorial craniotomy: illustrative cases

Feng Liu, Dongbo Li, Tao Yang, Congjin Li, Xianhua Luo, Minghui Li, Songlin Wang, Tao Jin, Chunhua Zhang, Changwen Luo
2022 Journal of Neurosurgery: Case Lessons  
BACKGROUND Remote cerebellar hemorrhage (RCH) is an extremely rare and potentially fatal complication after supratentorial craniotomy. However, the exact pathophysiological mechanism of RCH remains unclear, so clinicians often lack clinical experience in prevention, early diagnosis, and standardized treatment. OBSERVATIONS The authors retrospectively analyzed data of patients who underwent surgery for supratentorial lesions at their center between 2012 and 2021. They identified 4 patients who
more » ... veloped RCH among 4,075 patients who underwent supratentorial craniotomy. All 4 patients were male, with an average age of 57.5 years. One RCH occurred after tumor resection, and the other 3 occurred after aneurysm clipping. One patient was asymptomatic and received conservative treatment with a favorable outcome. The remaining 3 patients underwent lateral ventricular drainage and/or suboccipital decompression; 2 died, and 1 recovered well. LESSONS The authors believe that RCH should be considered as a multifactorial cause, and massive cerebrospinal fluid loss plays a key role in the development and progression of RCH. Asymptomatic RCH can be treated conservatively. However, in the case of conscious disturbance, hydrocephalus, and brain stem compression, surgery should be performed immediately. Early detection and individualized treatment would be helpful to avoid potentially fatal outcomes caused by RCH.
doi:10.3171/case21687 fatcat:6ysz4vaaczbknb2mofshpz6zg4

Preliminary Study on the Generating Mechanism of the Atmospheric Vertical Electric Field before Earthquakes

Ruilong Han, Minghui Cai, Tao Chen, Tao Yang, Liangliang Xu, Qing Xia, Xinyu Jia, Jianwei Han
2022 Applied Sciences  
Precursor signals for earthquakes, such as radon anomalies, thermal anomalies, and water level changes, have been studied in earthquake prediction over several centuries. The atmospheric vertical electric field anomaly has been observed in recent years as a new and valuable signal for short-term earthquake prediction. In this paper, a physical mechanism of the atmospheric vertical electric field anomaly before the earthquake was proposed, based on which the Wenchuan earthquake verified the
more » ... ctness of the model. Using Monte Carlo simulations, the variation of the radon concentration with height before the earthquake was used to simulate and calculate the ionization rates of radioactive radon decay products at different heights. We derived the atmospheric vertical electric field from −593 to −285 V/m from the surface to 10 m before the earthquake by solving the system of convection-diffusion partial equations for positive and negative particles. Moreover, negative atmospheric electric field anomalies were observed in both Wenjiang and Pixian before the Wenchuan earthquake on 12 May, with peaks of −600 V/m in Pixian and −200 V/m in Wenjiang. The atmospheric electric field data obtained from the simulation were shown to be in excellent concordance with the observed data of the Wenchuan earthquake. The physical mechanism can provide theoretical support for the atmospheric electric field anomaly as an earthquake precursor.
doi:10.3390/app12146896 fatcat:qlsbjauy6fbrxc5xn57kh353fy

A high-quality Actinidia chinensis (kiwifruit) genome

Haolin Wu, Tao Ma, Minghui Kang, Fandi Ai, Junlin Zhang, Guanyong Dong, Jianquan Liu
2019 Horticulture Research  
Actinidia chinensis (kiwifruit) is a perennial horticultural crop species of the Actinidiaceae family with high nutritional and economic value. Two versions of the A. chinensis genomes have been previously assembled, based mainly on relatively short reads. Here, we report an improved chromosome-level reference genome of A. chinensis (v3.0), based mainly on PacBio long reads and Hi-C data. The high-quality assembled genome is 653 Mb long, with 0.76% heterozygosity. At least 43% of the genome
more » ... ists of repetitive sequences, and the most abundant long terminal repeats were further identified and account for 23.38% of our novel genome. It has clear improvements in contiguity, accuracy, and gene annotation over the two previous versions and contains 40,464 annotated protein-coding genes, of which 94.41% are functionally annotated. Moreover, further analyses of genetic collinearity revealed that the kiwifruit genome has undergone two whole-genome duplications: one affecting all Ericales families near the K-T extinction event and a recent genus-specific duplication. The reference genome presented here will be highly useful for further molecular elucidation of diverse traits and for the breeding of this horticultural crop, as well as evolutionary studies with related taxa.
doi:10.1038/s41438-019-0202-y pmid:31645971 pmcid:PMC6804796 fatcat:lrbuqy4xunbbtg4egsts2pj6ne

How Do Aerosol Properties Affect the Temporal Variation of MODIS AOD Bias in Eastern China?

Minghui Tao, Zifeng Wang, Jinhua Tao, Liangfu Chen, Jun Wang, Can Hou, Lunche Wang, Xiaoguang Xu, Hao Zhu
2017 Remote Sensing  
The rapid changes of aerosol sources in eastern China during recent decades could bring considerable uncertainties for satellite retrieval algorithms that assume little spatiotemporal variation in aerosol single scattering properties (such as single scattering albedo (SSA) and the size distribution for fine-mode and coarse mode aerosols) in East Asia. Here, using ground-based observations in six AERONET sites, we characterize typical aerosol optical properties (including their spatiotemporal
more » ... iation) in eastern China, and evaluate their impacts on Moderate Resolution Imaging Spectroradiometer (MODIS) Collection 6 aerosol retrieval bias. Both the SSA and fine-mode particle sizes increase from northern to southern China in winter, reflecting the effect of relative humidity on particle size. The SSA is~0.95 in summer regardless of the AEROENT stations in eastern China, but decreases to 0.85 in polluted winter in northern China. The dominance of larger and highly scattering fine-mode particles in summer also leads to the weakest phase function in the backscattering direction. By focusing on the analysis of high aerosol optical depth (AOD) (>0.4) conditions, we find that the overestimation of the AOD in Dark Target (DT) retrieval is prevalent throughout the whole year, with the bias decreasing from northern China, characterized by a mixture of fine and coarse (dust) particles, to southern China, which is dominated by fine particles. In contrast, Deep Blue (DB) retrieval tends to overestimate the AOD only in fall and winter, and underestimates it in spring and summer. While the retrievals from both the DT and DB algorithms show a reasonable estimation of the fine-mode fraction of AOD, the retrieval bias cannot be attributed to the bias in the prescribed SSA alone, and is more due to the bias in the prescribed scattering phase function (or aerosol size distribution) in both algorithms. In addition, a large yearly change in aerosol single scattering properties leads to correspondingly obvious variations in the time series of MODIS AOD bias. Our results reveal that the aerosol single scattering properties in the MODIS algorithm are insufficient to describe a large variation of aerosol properties in eastern China (especially change of particle size), and can be further improved by using newer AERONET data. Remote Sens. 2017, 9, 800 2 of 15 near the surface can cause air pollution, which has robust relation with epidemic diseases affecting human health [2]. Unlike long-lived greenhouse gases such as CO 2 , the amount and properties of aerosol particles vary largely over space and time due to diverse emission sources and short lifetime, which make it a challenge to quantify the magnitude of aerosols and their climate effects [3] . Since the 1990s, a ground-based remote sensing network has been established to explore aerosol optical and microphysical properties [4] . Meanwhile, a variety of sophisticated sensors, such as Moderate Resolution Imaging Spectroradiometer (MODIS), Multi-angle Imaging SpectroRadiometer (MISR), Ozone Monitoring Instrument (OMI), CALIPSO, and other sensors have been launched to obtain aerosol information with global coverage [5] [6] [7] [8] . Aerosol optical properties, including aerosol optical depth (AOD) and aerosol single scattering properties (single scattering albedo (SSA) and phase function) regulate the role of aerosols in radiative transfer calculations; these properties in turn change with mass, size, shape, and the composition of the particles [9]. Since satellite spectral radiances at the top of the atmosphere (TOA) are affected by the radiative interactions between surface reflectance and aerosol scattering, not all aerosol properties can be fully constrained and retrieved reliably from satellite measurements at the TOA. Hence, aerosol single scattering properties (such as SSA and size distribution for fine or coarse particles that affect phase function) are often derived from a cluster analysis of ground observations, and are subsequently used in the algorithms for the satellite remote sensing of aerosols. For example, the MODIS aerosol algorithm only retrieves the AOD and the fraction between fine-mode and coarse mode AODs [10, 11] , while aerosol single scattering properties are fixed with only consideration of seasonal and continental-scale variation. The aerosol properties in eastern China are characterized by large spatiotemporal variations [12,13], which are not considered in the MODIS retrieval algorithm, and hence the impact of such variations on MODIS AOD biases deserve a dedicated investigation. Widespread haze pollution usually occurs over eastern China, with the mixing of anthropogenic emissions, natural dust, and biomass burning smoke [14, 15] . Ground observations show a distinct temporal variation and area-dependent change of optical and microphysical properties of aerosol particles [16] [17] [18] [19] , which resonates with our recent evaluation of MODIS Collection (C) 6 aerosol retrievals in China that show considerable bias with obvious geographic difference and temporal trend [20] . However, previous ground-based validations of satellite retrievals usually focus on an evaluation of the AOD, with less attention paid to understanding error sources from the variation of aerosol single scattering properties in real atmosphere [21, 22] . It was found that the temporal variations of aerosol scattering properties in regions such as southern Africa caused a seasonal shift of MODIS AOD biases [23] . To date, how the change of aerosol properties in China influences MODIS AOD bias at different spatial and temporal scales remains unclear, and is the focus of this study. We conduct a comprehensive analysis of aerosol single scattering properties in eastern China, and examine their impacts on biases in MODIS aerosol retrievals. Section 2 introduces the Aerosol Robotic Network (AERONET) and MODIS aerosol data sets used. Monthly variations of typical aerosol properties in six sites of eastern China are described in Section 3.1. Section 3.2 investigates the monthly bias of MODIS AOD and its connection with aerosol properties. The influence of decadal variations in aerosol properties on satellite retrievals is discussed specially in Section 3.3. The main purpose of this work is to present a reference for aerosol model assumptions in satellite retrievals over China. Data and Methods AERONET Aerosol Data Sets The AERONET is a worldwide network of sun photometers that provides continuous observations and inversions of aerosol optical and microphysical properties [4] . By measuring the direct solar irradiance, AOD can be acquired with a high accuracy of 0.01-0.02, which is usually taken as the "true" value in ground validation. With skylight observations, microphysical and single scattering parameters Remote Sens. 2017, 9, 800 3 of 15 such as volume size distribution, SSA, and phase function can be retrieved [9] . The retrieval error of the size distribution is within 10% of the maximum value in the median particle size range (0.1-7 µm). To obtain sufficient information, the SSA has to be retrieved in high aerosol loading (AOD 440 nm >0.4) and solar zenith angle (>50 • ) with an accuracy of~0.03. Aerosol data from six AERONET sites in typical regions were selected to investigate variations in aerosol optical properties in eastern China (Figure 1 ). There are nearly 15 years of continuous observations from the Beijing site since 2001, and 10 years of observations from the Xianghe, Taihu, and Hongkong sites from 2005 at Level 2.0 (cloud-screened and quality-assured), respectively. Observation over 4 years is available in Xuzhou from 2013 at Level 1.5 (cloud-screened). More than one year's observation exists in Qiandaohu at Level 1.5 from 2007 to 2009, but the inversions are much fewer, which is mainly used for reference here. The monthly mean values of aerosol microphysical and optical parameters are analyzed to show the temporal variations of the aerosol scattering properties. Outliers caused by few available inversions during the cloudy season are examined and removed. To match with the satellite data, the spatial average of MODIS AOD in 5 × 5 pixel around the ground site is compared with the temporal mean values of AERONET inversions within ±30 min of the satellite's passing time [24] . Since there is no 550 nm band in the sun photometers, we interpolate the AOD from the nearest bands on the two sides of 550 nm with their Ångström exponent.
doi:10.3390/rs9080800 fatcat:aez4nclttnbm7ht5xjtqb6pmda

Did the widespread haze pollution over China increase during the last decade? A satellite view from space

Minghui Tao, Liangfu Chen, Zifeng Wang, Jun Wang, Jinhua Tao, Xinhui Wang
2016 Environmental Research Letters  
A satellite view from space To cite this article: Minghui Tao et al 2016 Environ. Res.  ...  Extensive thick haze layers can linger over northern China for nearly one week before northern or southern winds become strong enough to blow them away (Tao et al 2014) .  ... 
doi:10.1088/1748-9326/11/5/054019 fatcat:ouzc6hupanctbamshmcn5my2km

A novel Ni2Mo3N/MCM41 catalyst for the hydrogenation of aromatics

Huamin Wang, Wei Li, Minghui Zhang, Keyi Tao
2005 Catalysis Letters  
Bulk and MCM41-supported Ni 2 Mo 3 N catalysts were prepared using a temperature-programmed reduction (TPR) method and characterized using XRD, TEM, ICP-AES, and N 2 adsorption analysis techniques. Their catalytic properties were measured for the simultaneous hydrogenation of p-xylene and naphthalene and compared with Ni/MCM41 and Mo 2 N/MCM41 catalysts having similar metal loadings. The results indicate that the Ni 2 Mo 3 N/MCM41 catalyst exhibits excellent deep hydrogenation activity under
more » ... d condition (T = 483 K, P = 3.0 MPa), and that it is more active than either Ni/MCM41 or Mo 2 N/MCM41 catalyst.
doi:10.1007/s10562-004-3088-7 fatcat:lhxfdwv6mzdlhf6bppm7q6f7pi

Characterization and catalytic application of homogeneous nano-composite oxides ZrO2–Al2O3

Guoran Li, Wei Li, Minghui Zhang, Keyi Tao
2004 Catalysis Today  
A series of ZrO 2 -Al 2 O 3 composite oxides with different ZrO 2 contents was prepared by means of a chemical precipitation method using ZrOCl 2 ·8H 2 O and pseudoboehmite as starting materials. The structures of the samples have been investigated by powder X-ray diffraction (XRD) and transmission electron micrography (TEM), with thermogravimetry differential thermal analysis (TG-DTA and DTG) combined. The results showed that the synthesized materials consisted of ZrO 2 and Al 2 O 3 nanosized
more » ... articles and they existed as amorphous phase in the samples with insufficient contents of ZrO 2 . The surface areas (S BET ), the pore volumes and the pore distributions were measured by nitrogen adsorption method, and a regular correlation between the pore distributions and contents of ZrO 2 was observed. NH 3 -temperature programmed desorption (NH 3 -TPD) was used to characterize the surface acidic properties of the samples. The investigation by X-ray photoelectron spectroscopy (XPS) indicated that there were interactions between ZrO 2 and Al 2 O 3 in the composite oxides. The synthesized ZrO 2 -Al 2 O 3 samples were purposively used as the supports for hydrodesulfurization (HDS) process. The sulfided CoMo/ZrO 2 -Al 2 O 3 catalysts were tested in the HDS reaction of dibenzothiophene (DBT), and the results showed that the sulfided CoMo catalysts supported on the composite oxide with a suitable ZrO 2 content performed a higher HDS activity than that supported on alumina.
doi:10.1016/j.cattod.2004.06.010 fatcat:2otlw4kyhbcnhpexreiaum6vuu

ksrMKL: a novel method for identification of kinase–substrate relationships using multiple kernel learning

Minghui Wang, Tao Wang, Ao Li
2017 PeerJ  
Author Contributions Minghui Wang conceived and designed the experiments, contributed reagents/ materials/analysis tools.  ...  Tao Wang conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts  ... 
doi:10.7717/peerj.4182 pmid:29340231 pmcid:PMC5741978 fatcat:s7rjfinj7jfb3givytdq45mhky

Guest Editorial: Advances in Machine Learning for Speech Processing

Minghui Dong, Jianhua Tao, Man Wai Mak
2016 Journal of Signal Processing Systems  
Tao received several awards from important conferences, and won twice the Scientific Technology Advance Award of Beijing City.  ...  Minghui Dong received BS degree from University of Science and Technology of China, MS degree from Peking University, and PhD degree from National University of Singapore in 1992 Singapore in , 1995 Singapore  ... 
doi:10.1007/s11265-016-1101-1 fatcat:3z5ysj6ianc2djiyhldfxmmpyi

S2N2: An Interpretive Semantic Structure Attention Neural Network for Trajectory Classification

Canghong Jin, Ting Tao, Xianzhe Luo, Zemin Liu, Minghui Wu
2020 IEEE Access  
MINGHUI WU received the Ph.D. degree in computer science from Zhejiang University, China, in 2011. He is currently a Professor with the Zhejiang University City College.  ...  TING TAO was born in Hangzhou, Zhejiang, China, in 1999. He is currently pursuing the bachelor's degree in software engineering with the Zhejiang University City College.  ... 
doi:10.1109/access.2020.2982823 fatcat:j3gpjdh5hjhptazfatjqfo6fou

A Novel Image Encryption Algorithm based on Parameter-Control Scroll Chaotic Attractors

Tao Wang, Liwen Song, Minghui Wang, Zhiben Zhuang
2020 IEEE Access  
MINGHUI WANG was born in 1971. He is currently a Professor with the College of Computer Science, Sichuan University, Chengdu, China.  ... 
doi:10.1109/access.2020.2975376 fatcat:t2emyorborhwrg7zbga74a5zla

Roles of Oxidative Stress in Polycystic Ovary Syndrome and Cancers

Tao Zuo, Minghui Zhu, Wenming Xu
2016 Oxidative Medicine and Cellular Longevity  
Oxidative stress (OS) has received extensive attention in the last two decades, because of the discovery that abnormal oxidation status was related to patients with chronic diseases, such as diabetes, cardiovascular, polycystic ovary syndrome (PCOS), cancer, and neurological diseases. OS is considered as a potential inducing factor in the pathogenesis of PCOS, which is one of the most common complex endocrine disorders and a leading cause of female infertility, affecting 4%–12% of women in the
more » ... orld, as OS has close interactions with PCOS characteristics, just as insulin resistance (IR), hyperandrogenemia, and chronic inflammation. It has also been shown that DNA mutations and alterations induced by OS are involved in cancer pathogenesis, tumor cell survival, proliferation, invasion, angiogenesis, and so on. Furthermore, recent studies show that the females with PCOS are reported to have an increasing risk of cancers. As a result, the more serious OS in PCOS is regarded as an important potential incentive for the increasing risk of cancers, and this study aims to analyze the possibility and potential pathogenic mechanism of the above process, providing insightful thoughts and evidences for preventing cancer potentially caused by PCOS in clinic.
doi:10.1155/2016/8589318 pmid:26770659 pmcid:PMC4684888 fatcat:5licrrl3djfthd33t6c3vex4re
« Previous Showing results 1 — 15 out of 478 results