检索结果-南通市图书馆

Novel Solutions of KdV Equation

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2004年第3期41卷 397-399页

作者： CHENZhe-yun BIJin-Bo CHENDeng-yuan DepartmentofMathematics ShanghaiUniversityShanghai200436China

Some novel solutions of the KdV equation are obtained through the modified bilinear B?cklund transformation.

关键词： novel solutions Hirota's method Backlund transformation KdV equation

Comparative proteomic analysis of plasma exosomes reveals the functional contribution of N-acetyl-alpha-glucosaminidase to Parkinson’s disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2998-3012页

作者： yuan Zhao Yidan Zhang Xin Liu Jian Zhang Ya Gao Shuyue Li Cui Chang Xiang Liu Guofeng Yang Department of Geriatrics Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Department of Neurosurgery The Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina

Parkinson’s disease is the second most common progressive neurodegenerative disorder,and few reliable biomarkers are available to track disease *** proteins,DNA,mRNA,and lipids carried by exosomes reflect intracellular changes,and thus can serve as biomarkers for a variety of *** this study,we investigated alterations in the protein content of plasma exosomes derived from patients with Parkinson’s disease and the potential therapeutic roles of these proteins in Parkinson’s *** a tandem mass tag-based quantitative proteomics approach,we characterized the proteomes of plasma exosomes derived from individual patients,identified exosomal protein signatures specific to patients with Parkinson’s disease,and identified N-acetyl-alpha-glucosaminidase as a differentially expressed protein.N-acetyl-alpha-glucosaminidase expression levels in exosomes from the plasma of patients and healthy controls were validated by enzyme-linked immunosorbent assay and western *** results demonstrated that the exosomal N-acetyl-alpha-glucosaminidase concentration was not only lower in Parkinson’s disease,but also decreased with increasing Hoehn-Yahr stage,suggesting that N-acetyl-alpha-glucosaminidase could be used to rapidly evaluate Parkinson’s disease ***,western blot and immunohistochemistry analysis showed that N-acetyl-alpha-glucosaminidase levels were markedly reduced both in cells treated with 1-methyl-4-phenylpyridinium and cells overexpressingα-synuclein compared with control ***,N-acetyl-alpha-glucosaminidase overexpression significantly increased cell viability and inhibitedα-synuclein expression in 1-methyl-4-phenylpyridinium-treated *** together,our findings demonstrate for the first time that exosomal N-acetyl-alpha-glucosaminidase may serve as a biomarker for Parkinson’s disease diagnosis,and that N-acetyl-alpha-glucosaminidase may reduceα-synuclein expression and 1-methyl-4-phenylpyridinium-induced n

关键词： biomarker diagnosis exosomes N-acetyl-alpha-glucosaminidase Parkinson’s disease proteomic α-synuclein

A promising approach for quantifying focal stroke modeling and assessing stroke progression:optical resolution photoacoustic microscopy photothrombosis

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 2029-2037页

作者： Xiao Liang Xingping Quan Xiaorui Geng Yujing Huang Yonghua Zhao Lei Xi Zhen yuan Ping Wang Bin Liu Faculty of Health Sciences University of MacaoMacao Special Administrative RegionChina Center for Cognitive and Brain Sciences University of MacaoMacao Special Administrative RegionChina Department of Biomedical Engineering Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipaMacao Special Administrative RegionChina Department of Emergency Zhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

To investigate the mechanisms underlying the onset and progression of ischemic stroke,some methods have been proposed that can simultaneously monitor and create embolisms in the animal cerebral ***,these methods often require complex systems and the effect of age on cerebral embolism has not been adequately studied,although ischemic stroke is strongly *** this study,we propose an optical-resolution photoacoustic microscopy-based visualized photothrombosis methodology to create and monitor ischemic stroke in mice simultaneously using a 532 nm pulsed *** observed the molding process in mice of different ages and presented age-dependent vascular embolism ***,we integrated optical coherence tomography angiography to investigate age-associated trends in cerebrovascular variability following a *** imaging data and quantitative analyses underscore the differential cerebrovascular responses to stroke in mice of different ages,thereby highlighting the technique's potential for evaluating cerebrovascular health and unraveling age-related mechanisms involved in ischemic strokes.

关键词： age-dependent cerebral cortex ischemic stroke mouse model optical coherence tomography angiography photoacoustic microscopy photothrombosis vascular imaging

Dye removal from wastewater using the adsorbent developed from sewage sludge

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2005年第6期17卷 1018-1021页

作者： CHEN Chun-yun WANG Peng ZHUANG yuan-yi School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China School of Biological and Environmental Engineering Jiangsu University Zhenjiang 212013 China

Sewage sludge was used to develop an effective carbon adsorbent. This adsorbent was employed for the removal of azo dye such as Direct Dark Brown M and Acid Mordant Brown RH. The adsorption of dyes on this adsorbent was studied as a function of contact time, concentration, pH and temperature by batch method. The equilibrium adsorption capacity of a carbonaceous adsorbent prepared from city wastewater treatment plant was 502, and 329.7 mg/g of Direct Dark Brown M and Acid Mordant Brown RH, respectively. The experimental data were analyzed by the Langmuir and Freundlich models of adsorption. Equilibrium data fitted well with the Langmuir model. The rates of adsorption were found to conform to the Lagergren second-order kinetics with good correlation. The equilibrium adsorption capacity of the carbonaceous adsorbents was determined with the Langmuir equation as well as the Lagergren second-order rate equation. The most ideal pH for adsorption of two dyes onto adsorbents was found to be 3 and below. The results indicate that the carbonaceous adsorbents could be employed as a low cost adsorbent in the removal of dyes from wastewater.

关键词： adsorbent sewage sludge azo dye isotherms kinetics

Restricted Cohomology of Restricted Lie Superalgebras

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2022年第11期38卷 2115-2130页

作者： Ji Xia yuan Liang yun CHEN Yan CAO School of Mathematical Sciences Heilongjiang UniversityHarbin 150080P.R.China School of Mathematical and Statistics Northeast Normal UniversityChangchun 130024P.R.China Department of Mathematics Harbin University of Science and TechnologyHarbin 150080P.R.China

Suppose the ground field F is an algebraically closed field characteristic of p>*** this paper,we investigate the restricted cohomology theory of restricted Lie *** interpretations of low dimensional restricted cohomology of restricted Lie superalgebra are *** show that there is a family of restricted model filiform Lie superalgebra Lλp,p structures parameterized by elementsλ∈*** explicitly describe both the 1-dimensional ordinary and restricted cohomology superspaces of Lλp,p with coefficients in the 1-dimensional trivial module and show that these superspaces are *** also describe the 2-dimensional ordinary and restricted cohomology superspaces of Lλp,p with coefficients in the 1-dimensional trivial module and show that these superspaces are unequal.

关键词： Restricted Lie superalgebras restricted cohomology restricted model filiform Lie superalgebras

Emergency response facility location in transportation networks: A literature review

在线全文

学校读者我要写书评

暂无评论

Journal of Traffic and Transportation Engineering(English Edition) 2021年第2期8卷 153-169页

作者： Yang Liu yun yuan Jieyi Shen Wei Gao College of Artificial Intelligence Nanjing Agricultural UniversityNanjing 210031China College of Transportation Engineering Dalian Maritime UniversityDalian 116026China College of Engineering University of UtahSalt Lake CityUT 84112USA

Emergency response activity relies on transportation networks. Emergency facility location interacts with transportation networks clearly. This review is aimed to provide a combined framework for emergency facility location in transportation networks. The article reveals emergency response activities research clusters, issues, and objectives according to keywords co-occurrence analysis. Four classes of spatial separation models in transportation networks, including distance, routing, accessibility, and travel time are introduced. The stochastic and time-dependent characteristics of travel time are described. Travel time estimation and prediction method, travel time under emergency vehicle preemption,transportation network equilibrium method, and travel time in degradable networks are demonstrated. The emergency facilities location models interact with transportation networks, involving location-routing model, location models embedded with accessibility,location models embedded with travel time, and location models employing mathematical program with equilibrium constraints are reviewed. We then point out the-state-of-art challenges: ilities-oriented, evolution landscape and sequential decision modelling, datadriven optimization approach, and machine learning-based algorithms.

关键词： Transportation engineering Emergency facility location Transportation networks Travel time Machine learning

同方期刊数据库

Exploring the characteristics of the flare from PMN J0218–2307 by Fermi-LAT

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2021年第7期21卷 17-22页

作者： yun-Chuan Xiang Yu-Liang Xin Min yuan Department of Astronomy Yunnan Universityand Key Laboratory of Astroparticle Physics of Yunnan ProvinceKunming650091China School of Physical Science and Technology Southwest Jiaotong UniversityChengdu 610031China

PMN J0218-2307(4 FGL J0218.9-2305) is classified as a blazar candidate with unknown type(BCU) in the fourth source catalog from the Fermi Large Area Telescope(Fermi-LAT).With the updated Fermi-LAT Pass 8 data,the γ-ray flaring activity toward PMN J0218-2307 is *** test statistic(TS) value of PMN J0218-2307 in energy band of 100 MeV-500 GeV is 133.893 with a significance level of 10.96σ.The maximum-likelihood photon flux is(8.131 ± 1.359) × 10^(-9) ph cm^(-2) s^(-1).A significantγ-ray flare in the period from 2008 August 4 to 2019 August 25 is found from the *** spectral characteristics of GeV energy band of PMN J0218-2307 is similar to that of flat-spectrum radio quasars(FSRQs) in the local Universe.

关键词： radiation mechanisms:non-thermal gamma rays:galaxies galaxies:active galaxies:individual(PMN J0218–2307)

Heavy Oil Reservoir Seismic Characteristics during Thermal Production:A Case Study

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2023年第4期34卷 1041-1052页

作者： Yi Zhang yun Wang Hemin yuan Jiapeng Liu School of Geophysics and Information Technology China University of GeosciencesBeijing 100083China CNOOC Limited Hainan BranchHaikou 570311China

Most production methods of heavy oil involve thermal ***,it is challenging to delineate the thermal-affected zone due to complex reservoir *** steam injected,the heavy oil viscosity drops;the reservoir density and velocity decrease accordingly,causing changes to seismic ***,the oil-and-water viscosity ratio and permeability show the difference with changing temperature,indicating that the reservoir’s ability to transmit seismic waves would also be ***,the seismic responses and attenuation characteristics of the steam chamber can be helpful to monitor the steam-affected *** introduce an improved viscoelastic model to approximate the heavy oil reservoir during thermal production,and use the frequency-space domain finite difference algorithm to simulate the seismic *** results demonstrate that this model is applicable to a wide temperature range,and can effectively reveal the seismic characteristics of the steam *** analyzing the propagation differences of seismic waves under different temperatures,it is concluded that the attenuation coefficient,root-meansquare amplitude difference and amplitude ratio of PP-wave and PS-wave under different conditions can reveal the temperature variation in the steam chamber,with which it is possible to detect the steam chamber spatial distribution.

关键词： heavy oil thermal production seismic response attenuation characteristics.

Representation learning via an integrated autoencoder for unsupervised domain adaptation

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2023年第5期17卷 75-87页

作者： Yi ZHU Xindong WU Jipeng QIANG yunhao yuan yun LI School of Information Engineering Yangzhou UniversityYangzhou 225127China Key Laboratory of Knowledge Engineering with Big Data(Ministry of Education of China) Hefei University of TechnologyHefei 230009China School of Computer Science and Information Engineering Hefei University of TechnologyHefei 230601China

The purpose of unsupervised domain adaptation is to use the knowledge of the source domain whose data distribution is different from that of the target domain for promoting the learning task in the target *** key bottleneck in unsupervised domain adaptation is how to obtain higher-level and more abstract feature representations between source and target domains which can bridge the chasm of domain ***,deep learning methods based on autoencoder have achieved sound performance in representation learning,and many dual or serial autoencoderbased methods take different characteristics of data into consideration for improving the effectiveness of unsupervised domain ***,most existing methods of autoencoders just serially connect the features generated by different autoencoders,which pose challenges for the discriminative representation learning and fail to find the real cross-domain *** address this problem,we propose a novel representation learning method based on an integrated autoencoders for unsupervised domain adaptation,called *** capture the inter-and inner-domain features of the raw data,two different autoencoders,which are the marginalized autoencoder with maximum mean discrepancy(mAE)and convolutional autoencoder(CAE)respectively,are proposed to learn different feature *** higher-level features are obtained by these two different autoencoders,a sparse autoencoder is introduced to compact these inter-and inner-domain *** addition,a whitening layer is embedded for features processed before the mAE to reduce redundant features inside a local *** results demonstrate the effectiveness of our proposed method compared with several state-of-the-art baseline methods.

关键词： unsupervised domain adaptation representation learning marginalized autoencoder convolutional autoen-coder sparse autoencoder