检索结果-南通市图书馆

维普期刊数据库

Integrating morphological spatial pattern analysis and the minimal cumulative resistance model to optimize urban ecological networks: a case study in Shenzhen City, China

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2021年第1期10卷 862-876页

作者： Yang‑Yang Li Yu‑Zhe Zhang zhi‑yun jiang Cheng‑Xuan Guo Ming‑Yue Zhao zhi‑Guang Yang Ming‑Yan Guo Bing‑Yue Wu Quan‑Ling Chen School of Geography South China Normal UniversityNo.55West of Zhong‑shan AvenueTianhe DistrictGuangzhou 510631China. Institute of Environ‑ment and Sustainable Development in Agriculture Chinese Academy of Agri‑cultural SciencesBeijing 100081China. School of Natural Resources Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China

Background:With the increasing fragmentation of landscape induced by rapid urbanization,the construction of ecological networks is of great signifcance to alleviate the degradation of urban habitats and protect natural envi‑***,there is considerable uncertainty when constructing ecological networks,especially the difer‑ent approaches to selecting ecological *** used the southern Chinese city of Shenzhen as a study area to construct and optimize ecological networks using a coupling *** source areas were extracted using morphological spatial pattern analysis(MSPA)and the landscape index *** networks were con‑structed using the minimal cumulative resistance(MCR)model and the gravity *** stones and ecological fault points were added in corridors to optimize the ecological ***:Ten core areas with maximum importance patch values were extracted by the landscape index method as ecological source areas according to MSPA,after which corridors between ecological sources were constructed based on the MCR *** constructed ecological networks were optimized using 35 stepping stones and 17 ecologi‑cal fault *** optimized ecological networks included 11 important corridors,34 general corridors,and seven potential *** results of corridor landscape-type analysis showed that a suitable ecological corridor is 60 to 200 m ***:Overall,our results imply that ecological source areas can be identifed virtually,and that ecological networks can be signifcantly optimized by combining MSPA and MCR *** results provide a methodologi‑cal reference for constructing ecological networks,and they will be useful for urban planning and biodiversity protec‑tion in Shenzhen and other similar regions around the world.

关键词： MSPA analysis MCR model Ecological corridor Ecological resistance surface Shenzhen City

Radiomics: Status quo and future challenges

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

Artificial Intelligence in Medical Imaging 2022年第4期3卷 87-96页

作者： zhi-yun jiang Li-Shuang Qi Jia-Tong Li Nan Cui Wei Li Wei Liu Ke-Zheng Wang Department of Positron Emission Tomography-Computed Tomography/Magnetic Resonance Imaging Harbin Medical University Cancer HospitalHarbin 150081Heilongjiang ProvinceChina College of Bioinformatics Science and Technology Harbin Medical UniversityHarbin 150086Heilongjiang ProvinceChina Department of Interventional Vascular Surgery The 4^(th)Affiliated Hospital of Harbin Medical UniversityHarbin 150001Heilongjiang ProvinceChina

Noninvasive imaging(computed tomography,magnetic resonance imaging,endoscopic ultrasonography,and positron emission tomography)as an important part of the clinical workflow in the clinic,but it still provides limited information for diagnosis,treatment effect evaluation and prognosis *** addition,judgment and diagnoses made by experts are usually based on multiple years of experience and subjective impression which lead to variable results in the same *** accumulation of medical imaging data,radiomics emerges as a relatively new approach for *** artificial intelligence techniques,highthroughput quantitative data which is invisible to the naked eyes extracted from original images can be used in the process of patients’*** studies have evaluated radiomics combined with clinical factors,pathological,or genetic information would assist in the diagnosis,particularly in the prediction of biological characteristics,risk of recurrence,and survival with encouraging *** various clinical settings,there are limitations and challenges needing to be overcome before ***,we summarize the concepts and method of radiomics including image acquisition,region of interest segmentation,feature extraction and model *** also set forth the current applications of radiomics in clinical *** last,the limitations and related deficiencies of radiomics are pointed out to direct the future opportunities and development.

关键词： Radiomics Methodologies Quantification Clinical applications Limitations

CaH2-promoted activity of Ni-carbonate interface for CO2 methanation

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 Energy Chemistry 2025年第1期100卷 522-532页

作者： Jin-Peng Wang Guo-Cui Mao Hui-Lin jiang Bao-Xia Dong yun-Lei Teng School of Chemistry and Chemical Engineering Yangzhou University

Transition metal-carbonate interfaces often act as active sites in heterogeneous catalytic *** interface between transition metal and metal carbonate exhibits a dynamic equilibrium during the CO2hydrogenation reaction,involving surface carbonate hydrogenation and ***,there have been few reports on engineering the activity of the interface between transition metal and alkaline earth metal carbonate for catalytic *** work demonstrated that the incorporation of CaH2in Ni/CaCO3enhances the CO2methanation activity of the *** CO2conversion for Ni/CaH2-CaCO3reached 68.5%at 400°C,which was much higher than that of the Ni/CaCO3（31.6%） and Ni/CaH2-CaO （42.4%） ***,the Ni/CaH2-CaCO3catalysts remained stable during the stability test for 24 h at 400°C and 8 *** research revealed that CaH2played a crucial role in promoting the activity of the Ni-carbonate interface for ***2could modify the electronic structure of Ni and tune the structural properties of CaCO3to generate medium basic sites （OH groups）,which are favorable for the activation of H2and ***-situ Fourier transform infrared spectroscopy （FTIR） analysis combined with density functional theory calculations demonstrated that CO2activation occurs at the hydroxyl group （OH） on the CaH2-modified Ni-carbonate surface,leading to the formation of CO3H****,our study has confirmed that CO2methanation over the Ni/CaH2-CaCO3catalysts proceeds via the formate pathway.

关键词： CO 2 methanation Metal hydride Ni catalysts Carbonate Metal-carbonate interface

Deciphering fungal metabolon coupling tandem inverse-electrondemand Diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong Di Man-Cheng Tang Ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-Mao Yuan Jun-Bo Yang zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng yun-Dong Wu Xiao-jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and Drug Design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand Diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

关键词： metabolon Diels-Alder reaction semipinacol rearrangement biosynthesis notoamides spiro polycyclic alkaloids

Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang Sheng-Jie Xu Ya-Qi Li zhi-Zhen Ren Liang Wang Wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

Toward understanding the role of genomic repeat elements in neurodegenerative diseases

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 646-659页

作者： Zhengyu An Aidi jiang Jingqi Chen Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina MOE Frontiers Center for Brain Science Fudan UniversityShanghaiChina MOE Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence Fudan UniversityShanghaiChina Zhangjiang Fudan International Innovation Center ShanghaiChina

Neurodegenerative diseases cause great medical and economic burdens for both patients and society;however, the complex molecular mechanisms thereof are not yet well understood. With the development of high-coverage sequencing technology, researchers have started to notice that genomic repeat regions, previously neglected in search of disease culprits, are active contributors to multiple neurodegenerative diseases. In this review, we describe the association between repeat element variants and multiple degenerative diseases through genome-wide association studies and targeted sequencing. We discuss the identification of disease-relevant repeat element variants, further powered by the advancement of long-read sequencing technologies and their related tools, and summarize recent findings in the molecular mechanisms of repeat element variants in brain degeneration, such as those causing transcriptional silencing or RNA-mediated gain of toxic function. Furthermore, we describe how in silico predictions using innovative computational models, such as deep learning language models, could enhance and accelerate our understanding of the functional impact of repeat element variants. Finally, we discuss future directions to advance current findings for a better understanding of neurodegenerative diseases and the clinical applications of genomic repeat elements.

关键词： Alzheimer's disease ataxia deep learning long-read sequencing neurodegeneration neurodegenerative diseases Parkinson's disease repeat element structural variant

维普期刊数据库

Miyaoka-type inequalities for terminal threefolds with nef anti-canonical divisors

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2025年第1期68卷 1-18页

作者： Masataka Iwai Chen jiang Haidong Liu Department of Mathematics Graduate School of ScienceOsaka University Shanghai Center for Mathematical Sciences & School of Mathematical Sciences Fudan University Department of mathematics Sun Yat-sen University

In this paper,we study Miyaoka-type inequalities on Chern classes of terminal projective 3-folds with nef anti-canonical *** X be a terminal projective 3-fold such that-KXis *** show that if c1（X） · c2（X）≠0,then c1（X） · c2（X） ≥ 1/252;if further X is not rationally connected,then c1（X） · c2（X） ≥ 4/5 and this inequality is *** order to prove this,we give a partial classification of such varieties along with many *** also study the nonvanishing of c1（X）dim X-2· c2（X） for terminal weak Fano varieties and prove a Miyaoka-Kawamata-type inequality.

关键词： terminal threefolds Miyaoka-type inequality boundedness

Optimal Scheduling of an Independent Electro-Hydrogen System with Hybrid Energy Storage Using a Multi-Objective Standardization Fusion Method

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2025年第1期122卷 63-84页

作者： SuliangMa ZeqingMeng Mingxuan Chen Yuan jiang School of Electrical and Control Engineering North China University of TechnologyBeijing100144China ChinaThree Gorges Technology Co. Ltd.Beijing100032China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China

In the independent electro-hydrogen system(IEHS)with hybrid energy storage(HESS),achieving optimal scheduling is ***,it presents a challenge due to the significant deviations in values ofmultiple optimization objective functions caused by their physical *** deviations seriously affect the scheduling process.A novel standardization fusion method has been established to address this issue by analyzing the variation process of each objective function’s *** optimal scheduling results of IEHS with HESS indicate that the economy and overall energy loss can be improved 2–3 times under different optimization *** proposed method better balances all optimization objective functions and reduces the impact of their *** the cost of BESS decreases by approximately 30%,its participation deepens by about 1 ***,if the price of the electrolyzer is less than 15￥/kWh or if the cost of the fuel cell drops below 4￥/kWh,their participation will increase *** study aims to provide a more reasonable approach to solving multi-objective optimization problems.

关键词： Electro-hydrogen system multi-objective optimization standardization method hybrid energy storage system

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

三维稳定试验对港工设计安全的影响

中国港湾建设 2016年第10期36卷 56-59页

作者：周枝荣姜云鹏中交第三航务工程勘察设计院有限公司上海200032 交通运输部天津水运工程科学研究所天津300456

现行防波堤设计与施工规范明确指出,防波堤结构应进行波浪模型试验验证.在工程实践中,由于地形地势、波浪条件、结构形式千差万别,规范没有明确具体采用何种模型试验对结构安全进行验证,需要根据工程具体情况具体分析.规范中考虑堤头和... 详细信息

现行防波堤设计与施工规范明确指出,防波堤结构应进行波浪模型试验验证.在工程实践中,由于地形地势、波浪条件、结构形式千差万别,规范没有明确具体采用何种模型试验对结构安全进行验证,需要根据工程具体情况具体分析.规范中考虑堤头和波浪破碎两大因素,块体重量为公式计算结果的 1.6 倍左右;通过三维稳定试验确定的非标准段块体稳定重量,达到最初设计的 2-2.3 倍.说明当波浪和地形条件比较复杂时,通过三维稳定试验验证护岸的稳定性是非常必要的,能够提前识别设计风险,保证工程安全.

关键词：设计安全三维稳定试验斜向浪护面块体波浪破碎

维普期刊数据库