检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

巴黎蓬皮杜中心为何要“闭关修行”五年？

环球人文地理 2024年第3期 50-59页

作者： Rae 小盒饭子晋的时光碎片 nw7.eu Zhanpy Krists Luhaers alex Vasey Oksana Avramenko 摄图网

2019年，巴黎圣母院遭遇火灾，超过三分之二的塔尖烧毁，标志性尖顶坍塌。历经4年修复，2024巴黎奥运会前夕，它终于回到大众视野，即将重新开放。但惊喜之余，巴黎另一地标蓬皮杜中心宣布，它要迎来“闭关”期。和巴黎偏爱倾诉古典情...

2019年，巴黎圣母院遭遇火灾，超过三分之二的塔尖烧毁，标志性尖顶坍塌。历经4年修复，2024巴黎奥运会前夕，它终于回到大众视野，即将重新开放。但惊喜之余，巴黎另一地标蓬皮杜中心宣布，它要迎来“闭关”期。和巴黎偏爱倾诉古典情怀的卢浮宫、大教堂、歌剧院不同，乔治·蓬皮杜国家艺术和文化中心（下文简称蓬皮杜中心）是一场年轻人的艺术狂欢，巴黎城中的异类。它极尽叛逆张狂之事，

关键词：

Old climatically-buffered infertile landscapes(OCBILs):more than harsh habitats,Atlantic Forest inselbergs can be drivers of evolutionary diversity

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2022年第9期19卷 2528-2543页

作者： Felipe de CARVALHO ARAÚJO Natália de AGUIAR-CAMPOS cleber Rodrigo de SOUZA Eduardo de Paiva PAULA Rubens Manoel dos SANTOS Laboratory of Phytogeography and Evolutionary Ecology Department of Forest SciencesFederal University of LavrasLavrasMinas GeraisBrazil

Granite-gneiss rock outcrop inselbergs are ancient stable ecosystems with old,climaticallybuffered infertile landscapes(OCBILs).Although inselbergs provide key ecosystem services,little is done for their conservation and,so far,a lot of their unknown evolutionary history has already been lost by human *** a fine-scale approach,here we tested if habitat and environmental filtering(the inselberg’s harshness)affect the evolutionary diversity of an Atlantic Forest inselberg in *** recorded all trees with a diameter at breast height≥5cm in 20 plots in four habitat types(total sampled area of 0.8 hectares),from highest to lowest:island,hillside,foothill,and semideciduous forest(matrix).We also collected soil samples for chemical,textural and physical soil *** fitted linear models to test the effects of soil and habitat on plotlevel metrics of phylogenetic diversity and structure,lineage diversity,phylogeneticβ-diversity,and evolutionary *** found that the upper inselberg habitats contain a distinct set of ancient,closely related,harsh-tolerant lineages,as well as a subset of lineages that persist under harsh conditions with a certain degree of water *** inferior inselberg habitats harbor higher lineage diversity than expected by *** strongly predicted evolutionary *** concluded that soil depth,slope,nutrients and texture(environmental filtering)and habitat types and topography(habitat filtering)shape the evolutionary history contained in fine-scale inselberg habitats,which should encourage the conservation of these ancient ecosystems.

关键词： Phylogenetic diversity Atlantic Forest Niche conservatism Environmental filters Soil fertility Terrestrial Island

Autonomous machine learning for early bot detection in the internet of things

在线全文

学校读者我要写书评

暂无评论

Digital Communications and Networks 2023年第6期9卷 1301-1309页

作者： alex Medeiros Araujo Anderson Bergamini de Neira Michele Nogueira Department of Informatics Federal University of Parana(UFPR)CuritibaBrazil Department of Computer Science Federal University of Minas Gerais(UFMG)Belo HorizonteBrazil

The high costs incurred due to attacks and the increasing number of different devices in the Internet of Things(IoT)highlight the necessity of the early detection of botnets(i.e.,a network of infected devices)to gain an advantage against ***,early botnet detection is challenging because of continuous malware mutations,the adoption of sophisticated obfuscation techniques,and the massive volume of *** literature addresses botnet detection by modeling the behavior of malware spread,the classification of malicious traffic,and the analysis of traffic *** article details ANTE,a system for ANTicipating botnEt signals based on machine learning *** system adapts itself to different scenarios and detects different types of *** autonomously selects the most appropriate Machine Learning(ML)pipeline for each botnet and improves the classification before an attack effectively *** system evaluation follows trace-driven experiments and compares ANTE results to other relevant results from the literature over four representative datasets:ISOT HTTP Botnet,CTU-13,CICDDoS2019,and *** show an average detection accuracy of 99.06%and an average bot detection precision of 100%.

关键词： Network security Bot early detection Autonomous machine learning Network traffic analysis

Representations of molecules and materials for interpolation of quantum-mechanical simulations via machine learning

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

npj Computational Materials 2022年第1期8卷 378-391页

作者： Marcel F.Langer alex Goeßmann Matthias Rupp NOMAD Laboratory Fritz Haber Institute of the Max Planck SocietyBerlinGermany Machine Learning Group Technische Universität BerlinBerlinGermany Institute of Mathematics Technische Universität BerlinBerlinGermany Citrine Informatics Redwood CityCAUSA Department of Computer and Information Science University of KonstanzKonstanzGermany

Computational study of molecules and materials from first principles is a cornerstone of physics,chemistry,and materials science,but limited by the cost of accurate and precise *** settings involving many simulations,machine learning can reduce these costs,often by orders of magnitude,by interpolating between reference *** requires representations that describe any molecule or material and support *** comprehensively review and discuss current representations and relations between *** selected state-of-the-art representations,we compare energy predictions for organic molecules,binary alloys,and Al–Ga–In sesquioxides in numerical experiments controlled for data distribution,regression method,and hyper-parameter optimization.

关键词： alloys corners precise

A review of the effects of forest fire on soil properties

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 Forestry Research 2022年第5期33卷 1419-1441页

作者： alex Amerh Agbeshie Simon Abugre Thomas Atta-Darkwa Richard Awuah Department of Environmental Management University of Energy and Natural Resources(UENR)SunyaniGhana Department of Forest Science University of Energy and Natural Resources(UENR)SunyaniGhana Department of Mechanical and Manufacturing Engineering University of Energy and Natural Resources(UENR)SunyaniGhana

Forest fires are key ecosystem modifiers affecting the biological,chemical,and physical attributes of forest *** extent of soil disturbance by fire is largely dependent on fire intensity,duration and recurrence,fuel load,and soil *** impact on soil properties is intricate,yielding different results based on these *** paper reviews research investigating the effects of wildfire and prescribed fire on the biological and physico-chemical attributes of forest soils and provides a summary of current knowledge associated with the benefits and disadvantages of such ***-intensity fires with ash deposition on soil surfaces cause changes in soil chemistry,including increase in available nutrients and *** intensity fires are noted for the complete combustion of organic matter and result in severe negative impacts on forest *** intensity fires result in nutrient volatilization,the break down in soil aggregate stability,an increase soil bulk density,an increase in the hydrophobicity of soil particles leading to decreased water infiltration with increased erosion and destroy soil *** soil heating(> 120℃) from high-intensity forest fires is detrimental to the soil ecosystem,especially its physical and biological *** this regard,the use of prescribed burning as a management tool to reduce the fuel load is highly recommended due to its low intensity and limited soil ***,the use of prescribed fires to manage fuel loads is critically needed in the light of current global warming as it will help prevent increased wildfire *** review provides information on the impact of forest fires on soil properties,a key feature in the maintenance of healthy *** addition,the review should prompt comprehensive soil and forest management regimes to limit soil disturbance and restore fire-disturbed soil ecosystems.

关键词： Forest fires Low-severity fire Mineralization Soil available nutrients Soil organic matter Volatilization

Improvement strategies for Ni-based alcohol steam reforming catalysts

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第11期86卷 447-479,I0010页

作者： alex Desgagnés Ommolbanin Alizadeh Sahraei Maria C.Iliuta UniversitéLaval Département de Génie Chimique1065 Avenue de la MédecineQuébecQC G1V 0A6Canada

Steam reforming(SR)of fossil methane is already a well-known,documented and established expertise in the industrial sector as it accounts for the vast majority of global hydrogen *** a sustainable development perspective,hydrogen production by SR of biomass-derived feedstock represents a promising alternative that could help to lower the carbon footprint of the traditional *** this regard,bio-alcohols such as methanol,ethanol or glycerol are among the attractive candidates that could serve as green hydrogen carriers as they decompose at relatively low temperatures in the presence of water compared to methane,allowing for improved H_(2)***,significant challenges remain regarding the activity and stability of nickel-based catalysts,which are most widely used in alcohol SR processes due to their affordability and ability to break C–C,O–H and C–H bonds,yet are prone to rapid deactivation primarily caused by coke deposition and metal particle *** this state-of-the-art review,a portfolio of strategies to improve the performance of Ni-based catalysts used in alcohol SR processes is unfolded with the intent of pinpointing the critical issues in catalyst *** examination of the literature reveals that the efforts tackling these recurring issues can be directed at the active metal,either by tuning Ni dispersion and Ni-support interactions or by targeting synergistic effects in bimetallic systems,while others focus on the support,either by modifying acid-base character,oxygen mobility,or by embedding Ni in specific crystallographic *** review provides a very useful tool to orient future work in catalyst development.

关键词： H2 production Alcohol steam reforming Ni-based catalysts Catalyst development Sintering Coke formation

Congruent responses of vascular plant and ant communities to pastoral land-use abandonment in mountain areas throughout different biogeographic regions

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2022年第1期11卷 469-482页

作者： Marcello Verdinelli Marco Pittarello Maria Carmela caria Giovanna Piga Pier Paolo Roggero Gian Marco Marrosu Stefano Arrizza Maria Leonarda Fadda Giampiero Lombardi Michele Lonati Ginevra Nota Maria Sitzia Simonetta Bagella Institute of BioEconomy(CNR IBE) National Research Council of Italy07100 SassariItaly Department of Agricultural Forestand Food Science(DIS-AFA)University of TorinoTorinoItaly Department of Chemistry and Pharmacy University of Sassari07100 SassariItaly Department of Agricultural Sciences University of Sassari07100 SassariItaly Desertification Research Center University of Sassari07100 SassariItaly AGRIS Sardegna Loc.Bonassai07100 SassariItaly

Background:There is a long-term trend towards the abandonment of agro-pastoral activities in the mountain areas of Europe:the following encroachment process of semi-natural grasslands by shrubs is one of the main severe threats to the conservation of biodiversity in mountain *** better understand the impact of land abandonment,we analysed the reliability of plant functional groups,ant traits,and ant functional groups as indicators of land use *** carried out the research in Italy at four sites along a latitudinal/altitudinal gradient in three biogeo-graphic regions(Mediterranean,Continental,Alpine).We identified three stages of a chronosequence at each site as representative of the plant succession in response to pastoral land-use ***:As expected,both the plant and ant assemblages considerably differed across sites at the species level and,within each site,among the three *** trend was found also using ant traits,functional groups of ants,and plant functional *** and plant communities were related in terms of composition and *** ants and ants with collective foraging strategy were associated with annual legumes and grasses(Therophytes);ants with a strictly individual foraging strategy with *** traits and plant functional groups indicated significant differences among the three stages of the ***,ant functional groups could not discriminate between the stages represented by secondary grasslands currently grazed and shrub-encroached grasslands ***:Despite some limitations of ant functional groups in explaining the succession stages of land abandonment,our results suggest that ants are a good surrogate taxon and might be used as bioindicators of land-use changes and ecosystem ***,our findings indicate that the functional group approach should be applied to other European ***,reducing the taxonomic complexity could cont

关键词： Biodiversity conservation Bioindicators Cross-taxon congruence Functional groups Land abandonment Monitoring Mountain pastures

在线全文

学校读者我要写书评

暂无评论

亚运会上的机器人（英文）

新世纪智能 2024年第Z7期 14-14页

作者： alex

From autonomous bug zappers to android pianists and driverless ice-cream trucks, machines have taken over—at least at China’s Asian *** Games opened Saturday after a one-year delay because of the pandemic with about 12,000 athletes and thousands of journalists, technical officials and spectators descending on Hangzhou.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

“在空中更好喝的”新型咖啡?（英文）

新世纪智能 2024年第31期 9-9页

作者： alex

Drinking bad coffee is just one of the many downsides of *** Airlines thinks it has a *** has created a custom blend with Portland-based roaster Stumptown to make a coffee that's immune from the altitude-changing effe...

关键词：