检索结果-南通市图书馆

Longitudinal assessment of peripheral organ metabolism and the gut microbiota in an APP/PS1 transgenic mouse model of Alzheimer’s disease

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2982-2997页

作者： Hongli Li Jianhua Huang di Zhao Lemei Zhu Zheyu Zhang min Yi Weijun Peng Department of Integrated Traditional Chinese&Western Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina National Clinical Research Center for Metabolic diseases ChangshaHunan ProvinceChina Hunan Academy of Chinese Medicine ChangshaHunan ProvinceChina Academician Workstation Changsha Medical UniversityChangshaHunan ProvinceChina

Alzheimer’s disease not only affects the brain,but also induces metabolic dysfunction in peripheral organs and alters the gut *** aim of this study was to investigate systemic changes that occur in Alzheimer’s disease,in particular the association between changes in peripheral organ metabolism,changes in gut microbial composition,and Alzheimer’s disease *** do this,we analyzed peripheral organ metabolism and the gut microbiota in amyloid precursor protein-presenilin 1(APP/PS1)transgenic and control mice at 3,6,9,and 12 months of ***-month-old APP/PS1 mice exhibited cognitive impairment,Alzheimer’s disease-related brain changes,distinctive metabolic disturbances in peripheral organs and fecal samples(as detected by untargeted metabolomics sequencing),and substantial changes in gut microbial composition compared with younger APP/PS1 ***,a strong correlation emerged between the gut microbiota and kidney metabolism in APP/PS1 *** findings suggest that alterations in peripheral organ metabolism and the gut microbiota are closely related to Alzheimer’s disease development,indicating potential new directions for therapeutic strategies.

关键词： Alzheimer’s disease APP/PS1 mice brain-kidney axis gut microbiota heart-brain axis liver-brain axis lung-brain axis microbiota-gut-brain axis peripheral organ metabolism spleen-brain axis

High-throughput Sequencing Reveals vsiRNAs Derived from Cucumber green mottle mosaic virus-infected Watermelon

在线全文

学校读者我要写书评

暂无评论

Horticultural Plant Journal 2017年第1期3卷 17-22页

作者： SUN Yuyan niu Xiaowei CUI di FAN min Institute of Vegetables Zhejiang Academy of Agricultural Sciences

Cucumber green mottle mosaic virus(CGMMV) is a member of the genus Tobamovirus, and is a serious pathogen of Cucurbitaceae crops. Virusderived small interfering RNAs(vsi RNAs), which are processed by dicer-like and Argonaute proteins as well as RNA-dependent RNA polymerase,mediate the silencing of viral genomic RNA and host transcripts. To identify the CGMMV derived vsi RNAs and reveal interactions between CGMMV and watermelon host plant, deep sequencing technology was used to identify and characterize the vsi RNAs derived from CGMMV in infected watermelon plants in present study. A total of 10 801 368 vsi RNA reads representing 71 583 unique s RNAs were predicted in CGMMVinoculated watermelon plants. The CGMMV vsi RNAs were mostly 21 or 22 nt long. The majority of the CGMMV vsi RNAs(i.e., 91.7%) originated from the viral sense strand. Additionally, uracil was the predominant 5′-terminal base of vsi RNAs. Furthermore, the putative targets and functions of some of the CGMMV vsi RNAs were predicted and investigated. The results enhance our understanding of the interaction between CGMMV and the host watermelon and provide molecular basis for CGMMV resistance improvement in watermelon and other Cucurbitaceae crops.

关键词： Citrullus lanatus cucumber green mottle mosaic virus high-throughput sequencing vsiRNAs

Helmholtz decomposition with a scalar Poisson equation in elastic anisotropic media

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第3期21卷 1597-1610页

作者： Xin-Yu Fang Gang Yao Qing-Qing Zheng Ping-min Zhang di Wu Feng-Lin niu State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China Unconventional Petroleum Research Institute China University of Petroleum(Beijing)Beijing102249China Department of Mathematics College of ScienceChina University of Petroleum(Beijing)Beijing102249China College of Geophysics China University of Petroleum(Beijing)Beijing102249China Department of Earth Environmental and Planetary SciencesRice UniversityHoustonTX77005UA

P-and S-wave separation plays an important role in elastic reverse-time *** can reduce the artifacts caused by crosstalk between different modes and improve image *** addition,P-and Swave separation can also be used to better understand and distinguish wave types in complex *** present,the methods for separating wave modes in anisotropic media mainly include spatial nonstationary filtering,low-rank approximation,and vector Poisson *** of these methods require multiple Fourier transforms or the calculation of large matrices,which require high computational costs for problems with large *** this paper,an efficient method is proposed to separate the wave mode for anisotropic media by using a scalar anisotropic Poisson operator in the spatial *** 2D problems,the computational complexity required by this method is 1/2 of the methods based on solving a vector Poisson ***,compared with existing methods based on pseudoHelmholtz decomposition operators,this method can significantly reduce the computational *** examples also show that the P and S waves decomposed by this method not only have the correct amplitude and phase relative to the input wavefield but also can reduce the computational complexity significantly.

关键词： Anisotropic media Scalar anisotropic Poisson equation Improved elastic wavefield decomposition

Arbitrary Decode-Forward Relaying with Re-Encoded Bits Selection Strategy for Polar Codes

在线全文

学校读者我要写书评

暂无评论

China Communications 2023年第8期20卷 153-162页

作者： di Guan Kai niu Chao Dong Key Laboratory of Universal Wireless Communication Ministry of EducationBeijing University of Posts and TelecommunicationsBeijing 100876China

In this paper,we propose an arbitrary decode-forward single-relay scheme for finite blocklength polar codes,which can be applied to the general symmetric discrete memoryless relay channel with orthogonal receiver *** relay node decodes the received *** relay node selectively re-encodes the message and transmits it to the destination ***,in order to minimize the upper-bound of the block error probability,we propose a selection strategy to decide the proper re-encoded bit set by the *** results are presented to illustrate the improvement in decoding performance of the proposed scheme compared to conventional relay schemes in both additive white Gaussian noise(AWGN)channel and Rayleigh fading channel(RFC).

关键词： polar codes decode-and-forward relaying arbitrary relay channel block error rate estimation

融合语义分割与模糊推理的无人机应急降落选址算法

在线全文

学校读者我要写书评

暂无评论

计算机工程与应用 2025年第01期61卷 174-185页

作者：李迪肖敏任东谢咏昶姚远三峡大学计算机与信息学院三峡大学湖北省农田环境监测工程技术研究中心

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应，对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题，提出了一种实时语义分割网络与模糊推理相结合的降落选址算法（STD... 详细信息

随着无人机的应用领域从娱乐摄影拓展到物流、军事和灾害响应，对于无人机的自主智能化要求也越来越高。针对无人机紧急情况下自主降落区域复杂难以保证着陆安全的问题，提出了一种实时语义分割网络与模糊推理相结合的降落选址算法（STDC-LSSNet）。考虑到潜在危险因素在航拍图像上占比小、易被错误分割的问题，提出了小目标特征提取模块（small target feature capture module,STFCM），通过计算不同尺度特征的相似性并进行权重分配，强化小目标特征的表达。考虑到安全区域与危险区域边界混淆会导致无人机降落存在巨大风险，提出了边界特征融合模块（boundary feature fusion module,BFFM），将浅层网络由拉普拉斯卷积得到的边界信息与深层网络的语义信息进行特征融合，引入注意力机制，增强边界区域特征的表达。通过对分割得到的图像进行模糊推理，从而精确识别应急降落地点。所提算法在公开数据集Semantic Drone和AeroScapes上与最先进的算法进行了广泛的对比实验，mIoU提升1.72个百分点和3.89个百分点，实时分割速度达到210 FPS，选址的速度达到58.62 ms，实现了无人机在复杂情况下的应急降落选址。

关键词：无人机自主降落实时语义分割模糊推理注意力机制

同方期刊数据库

Responses of Alpine Wetlands to Climate Changes on the Qinghai-Tibetan Plateau Based on Remote Sensing

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2020年第2期30卷 189-201页

作者： WANG Rui HE min niu Zhenguo State Key Laboratory of Remote Sensing Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100101China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

The alpine wetlands in QTP(Qinghai-Tibetan Plateau)have been profoundly impacted along with global climate *** employ satellite datasets and climate data to explore the relationships between alpine wetlands and climate changes based on remote sensing *** show that:1)the wetland NDVI(Normalized difference Vegetation Index)and GPP(Gross Primary Production)were more sensitive to air temperature than to precipitation *** wetland ET(evapotranspiration)across alpine wetlands was greatly correlated with precipitation rate.2)Alpine wetlands responses to climate changes varied spatially and temporally due to different geographic environments,variety of wetland formation and human disturbances.3)The vegetation responses of the Zoige wetland was the most noticeable and related to the temperature,while the GPP and NDVI of the Qiangtang Plateau and Gyaring-Ngoring Lake were significantly correlated with both temperature and precipitation.4)ET in the Zoige wetland showed a significantly positive trend,while ET in Maidika wetland and the Qiangtang plateau showed a negative trend,implying wetland degradation in those two wetland *** complexities of the impacts of climate changes on alpine wetlands indicate the necessity of further study to understand and conserve alpine wetland ecosystems.

关键词： Qinghai-Tibetan Plateau(QTP) alpine wetlands climate change Moderate-resolution Imaging Spectroradiometer(MOdiS) remote sensing

Solvent-free Synthesis of Flavanone over New Hybrid Mesoporous Base Catalysts

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2011年第4期27卷 664-668页

作者： WANG Hui niu Xiao-di ZHAO min XIAO Xue-bin WANG Hong-su WANG Zhong-dong Teaching Center of Basic Courses Jilin University Changchun 130062 P. R. China Department of Chemistry Mudanjiang Teachers College Mudanjiang 157012 P. R. China

Benzyl and anthracenemethyl groups were respectively bonded to the N atoms of 3-aminopropyl functionalized mesoporous SBA-15（APS-SBA-15） to obtain two new base catalysts over which the condensation reaction of benzaldehyde and 2＇-hydroxyacetophenone was *** catalytic activities and high selectivities for flavanones were obtained in solvent-free reactions,which is attributed to the effect of benzyl and anthracenemetyl groups on the base sites of catalysts and the steric hindrance of futher reaction of flavanone with benzaldehyde.

关键词： APS-SBA-15 Flavanone Bz-APS-SBA-15 An-APS-SBA-15

Regulating the oxygen-atom configuration of carbon anode enabling extremely fast-charging potassium-ion hybrid capacitors

在线全文

学校读者我要写书评

暂无评论

Nano Research 2025年第1期18卷 373-381页

作者： Daping Qiu Yuehui Wang Lulu Zhang Hang Lei Haizhou Ying Jin niu min Li Xuelin Yang Feng Wang Ru Yang Hubei Provincial Collaborative Innovation Center for New Energy Microgrid College of Electrical Engineering and New EnergyChina Three Gorges UniversityYichang 443002China State Key Laboratory of Chemical Resource Engineering Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China College of Materials and Chemical Engineering China Three Gorges UniversityYichang 443002China

Metal-ion hybrid capacitors,such as potassium-ion hybrid capacitors(PIHCs),are regarded as promising fast-charging energy storage ***,the kinetics mismatch between the battery anode and the capacitive cathode restricts their fastcharging *** constructing carbon anodes with enhanced kinetics is an innovative approach to address this ***,using epigallocatechin gallate with high oxygen content as the precursor,oxygen-enriched carbon materials(OEC)with tunable C=O content are successfully ***,the C=O content of OEC is regulated by adjusting the pyrolysis *** as an anode for PIHCs,OEC-600 with the highest C=O content exhibits an attractive fast-charging specific capacity of 135.2 mAh·g^(-1)at 20 A·g^(-1),along with a superior fast-charging cycling *** theoretical calculations,comprehensive kinetics analysis and in-situ Raman,the positive effects of C=O on the potassium storage capability and reversibility of OEC-600 are ***,PIHCs assembled based on an OEC-600 anode deliver impressive energy/power density of 145.1 Wh·kg^(-1)/45.9 kW·kg^(-1)and superior fast-charging cycling stability with 87.5%of capacity retention over 20,000 cycles at 5 A·g^(-1).This work is anticipated to provide an optional design concept toward the carbon anode for fast-charging PIHCs.

关键词： carbon anode oxygen epigallocatechin gallate potassium-ion hybrid capacitor

Flame Morphology and Characteristic of Co-Firing Ammonia with Pulverized Coal on a Flat Flame Burner

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第5期33卷 1935-1945页

作者： WANG Shengye CUI mingshuang LIU Pengzhong di Yi niu Fang China Coal Research Institute Beijing 100013China Beijing Tiandi Rongchuang Technology Co.Ltd. Beijing 100013China National Energy Technology&Equipment Laboratory of Coal Utilization and Emission Control Beijing 100013China

Ammonia as a new green carbon free fuel co-combustion with coal can effectively reduce CO_(2)emission,but the research of flame morphology and characteristics of ammonia-coal co-combustion are not *** this work,we studied the co-combustion flame of NH_(3)and pulverized coal on flat flame burner under different oxygen mole fraction(X_(i,O_(2)))and NH_(3)co-firing energy ratios(E_(NH_(3))).We initially observed that the introduction of ammonia resulted in stratification within the ammonia-coal co-combustion flame,featuring a transparent flame at the root identified as the ammonia combustion *** to challenges in visually observing the ignition of coal particles in the ammonia-coal co-combustion flame,we utilized Matlab software to analyze flame images across varying E_(NH_(3))and X_(i,O_(2)).The analysis indicates that,compared to pure coal combustion,the addition of ammonia advances the ignition delay time by 4.21 ms to 5.94 *** E_(NH_(3))increases,the ignition delay time initially decreases and then ***,an increase in X_(i,O_(2))results in an earlier ignition delay *** burn-off time and the flame divergence angle of pulverized coal demonstrated linear decreases and increases,respectively,with the growing ammonia *** addition of ammonia facilitates the release of volatile matter from coal ***,in high-ammonia environments,oxygen consumption also impedes the surface reaction of coal ***,measurements of gas composition in the ammonia-coal flame flow field unveiled that the generated water-rich atmosphere intensified coal particle gasification,resulting in an elevated concentration of ***,nitrogen-containing substances and coke produced during coal particle gasification underwent reduction reactions with NO_(x),leading to reduced NO_(x)emissions.

关键词： co-firing ammonia with coal flame characteristic gas component ignition delay time burn-off time flame divergence angle flat flame burner flame morphology