检索结果-南通市图书馆

临床肝胆病杂志 2024年第9期40卷 1777-1777页

作者：冯悦高沿航吉林大学第一医院感染病中心肝病科

酒精性肝炎(AH)是一种由大量、持续饮酒引起的急性临床综合征,表现范围从轻度肝酶水平升高到突然出现的黄疸、不适、腹痛和肝衰竭。重度酒精性肝炎(sAH)90 d病死率高。糖皮质激素治疗28 d可改善30 d生存率,但不能改善90 d生存率。

关键词：酒精性肝炎临床综合征泼尼松治疗肝衰竭随机对照试验黄疸生存率 sAH

Epitaxial growth and air-stability of monolayer Cu2Te

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第1期29卷 99-102页

作者： k Qian L Gao H Li s Zhang J H Yan C Liu J O Wang T Qian H Ding Y Y Zhang X Lin s X Du H-J Gao Institute of Physics&University of Chinese Academy of sciences Chinese Academy of SciencesBeijing 100190China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China CAs Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China

A new two-dimensional atomic crystal, monolayer cuprous telluride（Cu2Te） has been fabricated on a graphenesi C（0001） substrate by molecular beam epitaxy（MBE）. The low-energy electron diffraction（LEED） characterization shows that the monolayer Cu2Te forms ■ superstructure with respect to the graphene substrate. The atomic structure of the monolayer Cu2Te is investigated through a combination of scanning tunneling microscopy（sTM） experiments and density functional theory（DFT） calculations. The stoichiometry of the Cu2Te sample is verified by x-ray photoelectron spectroscopy（XPs） measurement. The angle-resolved photoemission spectroscopy（ARPEs） data present the electronic band structure of the sample, which is in good agreement with the calculated results. Furthermore, air-exposure experiments reveal the chemical stability of the monolayer Cu2Te. The fabrication of this new 2D material with a particular structure may bring new physical properties for future applications.

关键词： cuprous telluride(Cu2Te) scanning tunneling microscopy(sTM) density functional theory(DFT) chemical stability

Thermodynamic study of fluid in terms of equation of state containing physical parameters

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2015年第1期24卷 382-387页

作者： s.B.khasare Department of Physics science College Congress Nagar Nagpur Maharashtra State India

We introduce a simple condition for one mole fluid by considering the thermodynamics of molecules pointing towards the effective potential for the cluster. Efforts are made to estimate new physical parameter f in liquid state using the equation of state containing only two physical parameters such as the hard sphere diameter and binding energy. The temperature dependence of the structural properties and the thermodynamic behavior of the clusters are studied. Computations based on f predict the variation of numbers of particles at the contact point of the molecular cavity（radial distribution function）.From the thermodynamic profile of the fluid, the model results are discussed in terms of the cavity due to the closed surface along with suitable energy. The present calculation is based upon the sample thermodynamic data for n-hexanol, such as the ultrasonic wave, density, volume expansion coefficient, and ratio of specific heat in the liquid state, and it is consistent with the thermodynamic relations containing physical parameters such as size and energy. since the data is restricted to n-hexanol, we avoid giving the physical meaning of f, which is the key parameter studied in the present work.

关键词： equations of state Lenard–Jones potential hard-sphere potential

用微波和声波发生器加紫草根根部树皮进行非常规天然染色

在线全文

学校读者我要写书评

暂无评论

国外纺织技术（纺织针织服装化纤染整） 2002年第2期 23-24页

作者： V.tiwari 陈怡

1前言天然染料是一种从植物物质和动物剩余物中提取的染料.它们被认为是一种媒染染料,需要包含一种或多种金属盐,如:铝、铁、铬、铜、锡和其他金属以保证在日照和洗涤条件下有理想的颜色牢度.这些金属盐结合染料形成染料聚集物,它不能... 详细信息

1前言天然染料是一种从植物物质和动物剩余物中提取的染料.它们被认为是一种媒染染料,需要包含一种或多种金属盐,如:铝、铁、铬、铜、锡和其他金属以保证在日照和洗涤条件下有理想的颜色牢度.这些金属盐结合染料形成染料聚集物,它不能很容易地从织物上去除.这些天然染料被认为是有环境亲和力的,采用的金属盐通常是安全的,而不是铜或铬.

关键词：紫草根染料棉织物色牢度媒染剂微波染色提取声波染色

Effect of grinding methods and packaging materials on fenugreek and black pepper powder quality and quantity under normal storage conditions

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2014年第4期7卷 106-113页

作者： Murlidhar Meghwal T.k.Goswami AgFE Department IIT Kharagpur 721302WBIndia

The effects of different grinding methods and packaging materials on qualities of fenugreek and black pepper powders were *** parameters and their evaluation methods are as follows:change in colour determined using Chroma meter calorimeter,aroma and odour measured by sensory evaluation,and change in moisture measured using oven drying *** materials such as glass jar,steel jar,plastic jar,aluminum bag and poly bags were used for keeping ambient and cryogenically ground fenugreek and black pepper *** powders were stored in dry and cool places under ambient *** evaluation revealed quality reduction in terms of colour,odour,flavour,aroma and acceptability for fenugreek and black pepper powder stored for a long term(6 months).However,glass jar and steel jar were found to be better containers for storing powders for longer storage period than other *** practical applications,the present investigation on the deterioration behaviour of fenugreek and black pepper powder contributes to the design of a suitable grinder out of ball,hammer,rotor,and pin mill for spice *** study also helps select a suitable packaging material or container to store spice powders.A method to assess the quality of stored powder and its deterioration with the storage time is provided.

关键词： grinding method packaging material storage condition quality deterioration behavior aroma cryogenic ambient

An Analysis of the Proton structure Function and the Gluon Distributions at small x

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

Communications in Theoretical Physics 2019年第1期71卷 56-66页

作者： Luxmi Machahari D.k.Choudhury Department of Physics Gauhati University Physics Academy of North-East

Recently, we reported an analysis of Proton structure function at small x based on Taylor approximated DGLAP equations assuming a plausible relationship between the singlet and the gluon distributions. In this paper, we report a generalised version of the previous work. A corresponding study of the suggested gluon distribution is also *** present generalised version of the model for the structure function results in a wider x range of phenomenological validity than the earlier one. A comparison of both the models of the proton structure function and the gluon distribution is made with exact result as well as with the Froissart saturated models of Block, Durand and Mckay.

关键词： small x DGLAP equations proton structure function gluon distribution

Characterization and evolution of primary and secondary laterites in northwestern Bengal Basin, West Bengal, India

在线全文

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2015年第2期4卷 203-230页

作者： sandipan Ghosh sanat k.Guchhait Department of Geography The University of Burdwan

It is quite impossible to travel far in India without observing the remarkable fer- ruginous crust to which Buchanan in 1807 gave the name of laterite. In Indian peninsula, it is a post-Cretaceous stratigraphic succession with a polycyclic nature of evolution which marks the unconformity with recent Quaternary alluvium. There are perennial problems and research gaps in the investigation of laterites in India as well as in West Bengal：（1） defining, identify- ing and classifying latedtic materials, （2） mode of formation of laterite and its other horizons, （3） determining the ages of laterites, （4） reliability of laterites as palaeoclimatic indicators, （5） identifying topographic requirements and pedogeomorphic processes for laterite formation, and （6） reconstructions of former lateritized landscapes. The formation of north-south lateritic hard crust （Le. Rarh Bengal） on the Rajmahal Basalt Traps, Archean granite-gneiss, Gond- wana sediments, Paleogene gravels and older deltaic alluvium is analyzed here to resolve the aforesaid problems and to depict the variable characteristics of laterites with special reference to its tectono-climatic evolution in the northwestern marginal part of Bengal Basin. This paper reveals that the low-level secondary laterites （probably the Pliocene-Eady Pleistocene age） of Rarh Bengal are composed of heterogeneous Fe-AI rich gravelly materials which were derived from the high-level primary laterites （probably the Eocene-Miocene age） of plateau since the Paleogene Period by the peninsular river system, following the underlying structure of Bengal Basin. Alongside the roles of drifting of Indian Plate, establishment of monsoon climate, neo-tectonic uplifts and re-lateritization of ferruginous shelf deposits are determined here to unearth the palaeogenesis of primary and secondary laterites in West Bengal.

关键词： laterite Bengal Basin Rarh Bengal palaeogeography monsoon Paleogene

Toward managing mixed-species stands： from parametrization to prescription

在线全文

学校读者我要写书评

暂无评论

Forest Ecosystems 2017年第4期4卷 286-302页

作者： Hans Pretzsch Eric k. Zenner Chair for Forest Growth and Yield science Center of Life and Food Sciences Weihenstephan Technical University of Munich Hans-Carl-von Carlowitz-Platz 2 85354 Freising Germany

A better understanding and a more quantitative design of mixed-species stands will contribute to more integrative and goal-oriented research in mixed-species forests. Much recent work has indicated that the structure and growth of mixed species forests may fundamentally differ from monocultures. Here we suggest how to progress from the present accumulation of phenomenological findings to a design of mixed-species stands and advanced silvicultural prescriptions by means of modelling. First, the knowledge of mixing effects on the structure and growth at the stand, species, and individual tree level is reviewed, with a focus on those findings that are most essential for suitable modelling and silvicultural designs and the regulation of mixed stands as opposed to monocultures. Then, the key role of growth models, stand simulators, and scenario assessments for designing mixed species stands is discussed The next section illustrates that existing forest stand growth models require some fundamental modifications to become suitable for both monocultures and mixed-species stands. We then explore how silvicultural prescriptions derived from scenario runs would need to be both quantified and simplified for transfer to forest management and demonstrated in training plots. Finally, we address the main remaining knowledge gaps that could be remedied through empirical research.

关键词： Multiplicative mixing effects Overyielding Overdensity Modelling mixing effects scenario analysis,silvicultural prescriptions Practical guidelines

The integration of climate change,spatial dynamics,and habitat fragmentation:A conceptual overview

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2016年第1期11卷 40-59页

作者： Marcel HOLYOAk sacha k.HEATH Department of Environmental science and Policy University of California1 Shields AvenueDavis CA 95616USA Graduate Group in Ecology University of California1 Shields AvenueDavis CA 95616USA

A growing number of studies have looked at how climate change alters the effects of habitat fragmentation and degradation on both single and multiple species;some raise concern that biodiversity loss and its effects will be *** published literature on spatial dynamics(such as dispersal and metapopulation dynamics),habitat fragmentation and climate change requires synthesis and a conceptual framework to simplify *** propose a framework that integrates how climate change affects spatial population dynamics and the effects of habitat fragmentation in terms of:(i)habitat quality,quantity and distribution;(ii)habitat connectivity;and(iii)the dynamics of habitat *** use the framework to categorize existing autecological studies and investigate how each is affected by anthropogenic climate *** is clear that a changing climate produces changes in the geographic distribution of climatic conditions,and the amount and quality of *** most thorough published studies show how such changes impact metapopulation persistence,source-sink dynamics,changes in species’geographic range and community ***-related changes in movement behavior and quantity,quality and distribution of habitat have also produced empirical changes in habitat connectivity for some *** underexplored area is how habitat dynamics that are driven by climatic processes will affect species that live in dynamic *** end our discussion by suggesting ways to improve current attempts to integrate climate change,spatial population dynamics and habitat fragmentation effects,and suggest distinct areas of study that might provide opportunities for more fully integrative work.

关键词： global change global climate change habitat fragmentation metapopulation spatial dynamics.

sF-CNN: Deep Text Classification and Retrieval for Text Documents

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

Intelligent Automation & soft Computing 2023年第2期35卷 1799-1813页

作者： R.sarasu k.k.Thyagharajan N.R.shanker Computer science and Engineering Dhanalaksmi College of EngineeringAnna UniversityChennaiIndia R.M.D Engineering College Anna UniversityChennaiIndia Computer science and Engineering Aalim Muhammed Salegh College of EngineeringAnna UniversityChennaiIndia

Researchers and scientists need rapid access to text documents such as research papers,source code and *** research documents are available on the Internet and need more time to retrieve exact documents based on *** efficient classification algorithm for retrieving documents based on keyword words is *** traditional algorithm performs less because it never considers words’polysemy and the relationship between bag-of-words in *** solve the above problem,semantic Featured Convolution Neural Networks(sF-CNN)is proposed to obtain the key relationships among the searching keywords and build a structure for matching the words for retrieving correct text *** proposed sF-CNN is based on deep semantic-based bag-of-word representation for document *** deep learning methods such as Convolutional Neural Network and Recurrent Neural Network never use semantic representation for *** experiment is performed with different document datasets for evaluating the performance of the proposed sF-CNN ***-CNN classifies the documents with an accuracy of 94%than the traditional algorithms.

关键词： semantic classiﬁcation convolution neural networks semantic enhancement