检索结果-南通市图书馆

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

英国泥浆泉:最新资料

宝石和宝石学杂志(中英文) 1993年第2期 19-19页

作者： w.i.stanton 熊财发

在《今日地质》(1988年第4卷第187页)中,我对威尔特邦(英格兰)wotton Bassett各殿堂泥浆泉作过描述,并询问读者是否了解在英国还有类似泥浆泉.谢菲尔德大学的M. A. whyte写信告诉我,在德比郡的德文河旁有一个"泥浆火山",并进行了描述,... 详细信息

在《今日地质》(1988年第4卷第187页)中,我对威尔特邦(英格兰)wotton Bassett各殿堂泥浆泉作过描述,并询问读者是否了解在英国还有类似泥浆泉.谢菲尔德大学的M. A. whyte写信告诉我,在德比郡的德文河旁有一个"泥浆火山",并进行了描述,他的儿子曾经落入该"泥浆火山"中.但他认为它不是一个深根系统.因此,类似圣殿堂的泥浆泉在英国似乎稀少.1989年戈斯内尔观察过该泥浆泉,并注意到在溪流(汉考克湖)附近有两个活动出口.1990年我听说由于一次事件,汉考克湖约600米区域突

关键词：殿堂火山汉考克碎石石料英国大不列颠及北爱尔兰联合王国

Developing a two-decadal time-record of rice field maps using Landsat-derived multi-index image collections with a random forest classifier:A Google Earth Engine based approach

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

information Processing in Agriculture 2024年第2期11卷 260-275页

作者： w.Ashane M.Fernando i.P.Senanayake Department of Nano Science Technology Wayamba University of Sri LankaKuliyapitiya 60200Sri Lanka Dchoolf Engineing CllegeoEngineeringSience and EnionmentThe UniversyewcastleCallaghanW2Austraia

Historic maps showing the temporal distribution of rice fields are important for precision agriculture,irrigation optimisation,forecasting crop yields,land use management and formulating ***,mapping rice felds using traditional ground surveys is impractical when high cost,time and labour requirements are considered,and the availability of such detailed records is *** satellite remote sensing appears to be a viable solution,conventional segmentation and classification methods with spectral bands are often unable to contrast the distinct characteristics between rice fields and other vegetation *** this end,we explored a novel,Google Earth Engine(GEE)based multiindex random forest(RF)classification approach to map rice fields over two *** images from 2000 to 2020 of two Sri Lankan rice cultivation districts were extracted from GEE and a multi-index RF classification algorithm was applied to distinguish the rice *** results showed above 80%accuracy for both training and validation,when compared against high spatial resolution Google Earth *** essence,multi-index sampling and RF together synergised the compelling classifcation accuracy by effectively capturing vegetation,water(ponding)and soil characteristics unique to the rice felds using a single-click *** maps developed in this study were further compared against the MODiS land cover type product(MCD12Q1)and the corresponding superior statistics on rice fields demonstrated the robustness of the proposed *** work seeking effective index combinations is recommended,and this approach can potentially be extended to other crop analyses elsewhere.

关键词： Google Earth Engine(GEE) image classification Random forest Mapping rice fields Time series analysis Vegetation index

Limosilactobacillus mucosae FZJTZ26M3 prevents NAFLD in mice through modulation of lipid metabolism and gut microbiota dysbiosis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human wellness 2024年第3期13卷 1589-1601页

作者： Danting Dang Bowen Li Mengfan Ding RPaul Ross Catherine stanton Jianxin Zhao Bo Yang wei Chen State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxi 214122China School of Food Science and Technology Jiangnan UniversityWuxi 214122China international Joint Research Center for Probiotics&Gut Health Jiangnan UniversityWuxi 214122China APC Microbiome ireland University College CorkCork T12 YT20Ireland Teagasc Food Research Centre MooreparkFermoyCork T12 YT20Ireland National Engineering Research Center for Functional Food Jiangnan UniversityWuxi 214122China

Lactobacillus are considered promising therapeutic methods for nonalcoholic fatty liver disease(NAFLD).The effects of two strains of Ltmosilactobacillus mucosae on NAFLD were investigated in this ***-old male C57BL/6J mice were divided into 4 groups(n=8 per group,Control,Model,FZJTZ26M3,FGSYC17L3).*** FZJTZ26M3 reduced the mice 's body weight,liver weight,and adipose tissue weight after 12 weeks of *** to serum analysis,total cholesterol,triacylglycerol,and low-density lipoprotein cholesterol significantly decreased after *** FZJTZ26M3 *** pathology showed that *** FZJTZ26M3 was effective to ameliorate lipid deposition in NAFLD ***,the expression of the gene related to lipid metabolism in the liver and adipose tissue was analyzed,and the results indicated that *** FZJTZ26M3 could alleviate NAFLD by regulating lipid ***,the results of 16S rRNA gene sequencing revealed a drop in the relative abundance of Ruminococcaceae,which is linked to inflammation,but the relative abundance of a potential probiotic Akkermansia significantly increased after *** FZJTZ26M3 ***,*** FZJTZ26M3 could be a candidate to prevent NAFLD.

关键词： Limosilactobacillus mucosae Nonalcoholic fatty liver disease(NAFLD) Probiotic Lipid metabolism Gut microbiota

维普期刊数据库

Generalized time-dependent generator coordinate method for induced fission dynamics

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第4期19卷 1-12页

作者： B.Li D.Vretenar T.Nikšić J.Zhao P.w.Zhao J.Meng State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Physics Department Faculty of ScienceUniversity of Zagreb10000 ZagrebCroatia Center for Circuits and Systems Peng Cheng LaboratoryShenzhen 518055China

The generalized time-dependent generator coordinate method(TD-GCM)is extended to include pairing *** correlated GCM nuclear wave function is expressed in terms of time-dependent generator states and weight *** particle–hole channel of the effective interaction is determined by a Hamiltonian derived from an energy density functional,while pairing is treated dynamically in the standard BCS approximation with time-dependent pairing tensor and single-particle occupation *** the inclusion of pairing correlations,various time-dependent phenomena in open-shell nuclei can be described more *** model is applied to the description of saddle-to-scission dynamics of induced *** generalized TD-GCM charge yields and total kinetic energy distribution for the fission of 240Pu,are compared to those obtained using the standard time-dependent density functional theory(TD-DFT)approach,and with available data.

关键词： nuclear density functional theory generator coordinate method fission dynamics

The current status and future development of high-temperature conventional superconductivity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Science Review 2024年第7期11卷 18-20页

作者： Mikhail i.Eremets High Pressure Chemistry and Physics Group Max-Planck-Institut für Chemie

This survey highlights key advancements in high-temperature superconductivity in hydrogen-rich materials, emphasizing the robust evidence and reproducibility of superconductivity under challenging experimental conditions of megabar pressures. in the near future, achieving room-temperature superconductivity is highly probable, and the field is expected to transition towards near-ambient-pressure superconductivity.

关键词：

Using fracture-based continuum modeling of coupled geomechanical-hydrological processes for numerical simulation of hydraulic fracturing

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 Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1582-1599页

作者： Goodluck i.Ofoegbu GNO Modeling Research LLC. San AntonioTX78253USA

This paper describes numerical simulation of hydraulic fracturing using fracture-based continuum modeling(FBCM)of coupled geomechanical-hydrological processes to evaluate a technique for high-density fracturing and fracture *** simulations are innovative because of modeling discrete fractures explicitly in continuum analysis.A key advantage of FBCM is that fracture initiation and propagation are modeled explicitly without changing the domain grid(*** re-meshing).Further,multiple realizations of a preexisting fracture distribution can be analyzed using the same domain *** simulated hydraulic fracturing technique consists of pressurizing multiple wells simultaneously:initially without permeating fluids into the rock,to seed fractures uniformly and at high density in the wall rock of the wells;followed by fluid injection to propagate the seeded fracture density *** combines the ease of continuum modeling with the potential accuracy of modeling discrete fractures and fracturing *** are modeled as piecewise planar based on intersections with domain elements;fracture geometry stored as continuum properties is used to calculate parameters needed to model individual fractures;and rock behavior is modeled through tensorial aggregation of the behavior of discrete fractures and unfractured *** are presented for previously unfractured rock and for rock with preexisting fractures of horizontal,shallow-dipping,steeply dipping,or vertical *** of a single-well model are used to determine the pattern and spacing for a multiple-well *** results illustrate high-density fracturing and fracture caging through simultaneous fluid injection in multiple wells:for previously unfractured rock or rock with preexisting shallow-dipping or horizontal fractures,and in situ vertical compressive stress greater than *** preexisting fractures are steeply dipping or vertical,and considering the same in situ

关键词： Discrete fracture Fracture-based continuum modeling Fracture caging High-density fracturing Hydraulic fracturing Preexisting fracture

Voices From the industry:How EdTech Leaders Responded to the COViD-19 Pandemic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ECNU Review of Education 2024年第2期7卷 420-441页

作者： Deoksoon Kim Katrina Borowiec Drina Kei Yatsu stanton wortham Boston College Lynch School of Education and Human DevelopmentI40 Commonwealth AvenueChestnut HillMA02467-3800USA

Purpose Educational technology(“EdTech”)served a pivotal role in keeping schools functioning during the beginning of the COViD-19 *** is known about EdTech leaders’roles in shaping this *** study explores EdTech leaders’perspectives and backgrounds,their response to the pandemic,how they envision their roles as educators,and their perspectives about how technology facilitates educational ***/Approach/Methods This study uses a qualitative,phenomenological approach to understand how 11 EdTech leaders experienced the *** were recruited for interviews in summer 2021 via purposive sampling to include diverse backgrounds and *** were analyzed *** The findings show that a four-category typology can be used to describe EdTech leaders’diverse backgrounds and *** emphasized equity and open collaboration in their pandemic responses,by expanding access to their tools and adapting their products as users’needs *** leaders anticipate streamlined user experiences,improvements in online learning,and increased adoption of artificial intelligence and simulated learning ***/Value This study addresses a gap in the research concerning EdTech leaders’perspectives on their efforts to support educators and their experiences during the *** hope this study sparks additional research on EdTech leaders’experiences and roles in education.

关键词： Collaboration COViD-19 pandemic educational technology innovation leadership technology access

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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 Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.T.Jeong S.w.Lee w.J.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the HCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

维普期刊数据库

Lactobacillus acidophilus and Bifidobacterium breve alleviate neonatal maternal separation induced visceral hypersensitivity and non-spatial memory impairment in rats by the NGF/TrkA pathway

在线全文

学校读者我要写书评

暂无评论

Food Science and Human wellness 2024年

作者： Chi Chen Bowen Li Mengfan Ding Huizhen Li Jianxin Zhao R.Paul Ross Catherine stanton wei Chen Bo Yang State Key Laboratory of Food Science and Resources， Jiangnan University School of Food Science and Technology， Jiangnan University international Joint Research Center for Probiotics & Gut Health， Jiangnan University APC Microbiome ireland， University College Cork Teagasc Food Research Centre， Moorepark National Engineering Research Center for Functional Food， Jiangnan University

irritable bowel syndrome-diarrhea （iBS-D） is a prevalent functional bowel disease severely impairs the quality of life of patients. Visceral hypersensitivity （VH） is the main symptom of iBS-D. Probiotics have been found to effectively alleviate VH. in this study， neonatal maternal separation （NMS） was used to induce VH in 72 rats and investigated the effects of daily gavage of 3*109CFU of Lactobacillus and Bifidobacterium on alleviating the symptoms of iBS-D and behavioral interventions， as well as exploring potential mechanisms. The results demonstrated that Lactobacillus acidophilus and Bifidobacterium breve could alleviate the symptoms of iBS-D such as VH and increased frequency of bowel movements， as well as improving non-spatial memory in NMS rats. These effects were achieved by modulating the composition of gut microbiota and metabolites （including short-chain fatty acids， deoxycholic acid and adenosine）， and by regulating the expression of genes and proteins associated with the NGF/TrkA signaling pathway， tryptophan metabolism， and inflammatory factors in the hippocampus. This finding suggests that Lactobacillus acidophilus and Bifidobacterium breve have promising potential for the alleviation of iBS.

关键词：