检索结果-南通市图书馆

soil organic carbon storage in forest restoration models and environmental conditions

Journal of Forestry Research 2022年第4期33卷 1123-1134页

作者： Ranieri Ribeiro Paula Miguel Calmon maria Leonor Lopes-Assad Eduardo de sáMendonça Departamento de Agronomia Programa de Pós-Graduação em Produção VegetalUniversidade Federal do Espírito SantoAlto UniversitárioGuararemaAlegreEspírito Santo CEP 29500-000Brazil World Resources Institute SalvadorBahia CEP 40290-040Brazil Departamento de Recursos Naturais e Proteção Ambiental Universidade Federal de São CarlosArarasSão Paulo CEP 13600-970Brazil

The scale of forest and landscape restoration is expected to increase during the UN Decade on Ecosystem Restoration and its contribution to the provision of critical ecosystem services to *** models of forest restoration may improve ecosystem services,including soil organic carbon(sOC)storage.A review was carried out to access:(1)the variability of sOC storage between worldwide forest restoration models and,(2)the effects of climate,soil class,soil texture,and vegetation type on sOC *** reviewed 119 primary studies with information on sOC and soil texture for different forest restoration *** restoration models were grouped into four categories:natural regeneration,monocultures,agroforestry,and mixed *** data was extracted from these four restoration models,other land uses(cropland,bare land,grassland,and natural forest),climate regimes,and soil *** sOC storage in the forest restoration models and other land uses at a global scale ranged between 0.1 to 514 Mg ha^(-1).The overall mean value for sOC storage was higher for natural regeneration(112 Mg ha^(-1)),followed by agroforestry(74 Mg ha^(-1)),mixed forest(73 Mg ha^(-1)),and monocultures(68 Mg ha^(-1)).However,the average sOC storage was similar among the four restoration models in the moist warm climate *** sOC storage mean value in the moist cool zone was 23%higher than the dry cool zone(81 and 62 Mg ha^(-1),respectively),and 50%higher for the moist warm zone when compared to the dry warm climatic zone(74 and 38 Mg ha^(-1),respectively).The sOC storage of the restoration models was positively related to soil depth(0.59;pstand age(0.17;ps of sOC storage were 26,66,and 139 Mg ha^(-1) at zero-10,zero-30,and zero-100 cm depths,*** addition,sandy soils showed smaller mean values of sOC storage than medium to clay soils,especially in deeper soil ***,sOC storage was positively re

关键词： Forest restoration Land uses soil type soil texture Climate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bringing chiral functionality to in vivo applications of nanomaterials

引用

Light(science & Applications) 2022年第6期11卷 1038-1039页

作者： maria Mukhina Department of Molecular and Cellular Biology Harvard UniversityCambridgeMA 02138USA

Chirality is a universal property of an endless number of objects in the *** is rapidly expanding to find ways to introduce chirality to artificial *** a recent publication in Light:science and Applications,Das et *** successfully used capping with chiral ligand molecules to obtain chiral carbon *** authors provide a theoretical model to describe the origin of chirality in carbon dots as arising due to exciton coupling in a pair of chiral *** to non-toxic chemical composition and sizes as small as 2-5 nm,the chiral carbon dots have the potential to outperform other chiral nanostructures in numerous biomedical ***,similarly to chiral drugs,their chiral toxicity must be well understood before the carbon dots are brought to living systems.

关键词： chiral sizes expanding

来源：

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

Assessment of Cancer-Related Fatigue Expression:Comparing the Expression of Fatigue in Patients with a History of Cancer,Patients with Other Chronic Diseases,and Healthy Individuals

引用

Psycho-Oncologie 2024年第1期18卷 49-57页

作者： maria Inês Clara maria Cristina Canavarro Ana severina susana Ramos Carla Rafael Ana Allen Gomes Chronopsychology and Cognitive systems Lab(ChronCog) University of CoimbraCoimbra3000-115Portugal Center for Research in Neuropsychology and Cognitive and Behavioral Intervention(CINEICC) University of CoimbraCoimbra3000-115Portugal Faculty of Psychology and Educational sciences University of CoimbraCoimbra3000-115Portugal Oncology Department Centro Hospitalar do Médio Tejo(CHMT)Torres Novas2350-754Portugal

Aims:We aimed to compare cancer survivors’fatigue expression with that of the general population and examine psychobiological factors associated with ***:In this quantitative,transversal study,we analyzed clinical and sociodemographic indicators of 389 participants(68.38%females):148 cancer survivors on active treatment,55 disease-free survivors,75 patients with another chronic disease,and 111 healthy ***:Fatigue was expressed dissimilarly in patients with a previous history of cancer and participants without a history of *** on active treatment reported significantly higher levels of fatigue than the other clinical status ***,some level of cancer-related fatigue persisted,in a similar pattern,after active treatment into the survivorship ***-free survivors showed significantly lower vigor levels when compared to patients with other chronic *** distress and daytime sleepiness emerged as transdiagnostic factors associated with ***:Cancer-related fatigue may have a unique pattern,characterized by reduced endurance and muscle *** the present study,psychological distress and daytime sleepiness are associated with cancer-related *** findings suggest the pertinence of future studies examining whether interventions targeting those factors may help manage this burdensome complaint.

关键词： Fatigue cancer patients cancer burden psychological distress cancer survivors neoplasms

来源：

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

Influence of Annealing Conditions on Nanocrystalline and Ultra-soft Magnetic Properties of Fe_(75.5)Cu_1Nb_1_si_(13.5)B_9 Alloy

引用

Journal of Materials science & Technology 2012年第1期28卷 21-26页

作者： s.P. Mondal Kazi Hanium maria s.s. sikder shamima Choudhury D.K. saha M.A. Hakim Department of Physics Khulna University of Engineering & TechnologyKhulna-9203Bangladesh Department of Physics University of DhakaDhaka-1000Bangladesh Materials science Divisions Atomic Energy CentreDhaka-1000DhakaBangladesh

The magnetic and structural properties of FINEMET alloy with a composition of ***1Nb1si13.5B9 were investigated after primary and secondary crystallization of amorphous ribbon sample. The crystallization behavior and the nanocrystal formation of the samples were performed by differential thermal analysis （DTA） which in turn was supported by X-ray diffraction （XRD） study. Temperature dependence of initial permeability of amorphous and devitrified toroid shaped samples has been measured. Enhancement of Curie temperature of the amorphous alloy has been observed due to the irreversible structural relaxation. With the appearance of nanocrystalline phase the Curie temperature of the residual amorphous phase gradually decrease with the increase of annealing temperature. Their temperature dependence reflects the characteristic annealing temperature evolution of the basic magnetic parameters in these nanocrystalline systems. saturation magnetization, Ms, increases with annealing temperature Ta for the samples and finally decreases during annealing at a temperature much higher than peak crystallization temperature.

关键词： Nanostuctured alloy Curie temperature saturation Magnetization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Acoustic micro‐beam vortex generator for flow actuation inside droplets

引用

Droplet 2024年第1期3卷 125-135页

作者： Diego sánchez‐saldaña maria Fernandino Carlos A.Dorao Department of Energy and Process Engineering Norwegian University of Science and TechnologyTrondheimNorway

Controlling acoustic streaming inside a droplet has excellent potential for enabling fluid and particle operations such as mixing,separation,and aggregation in various *** concepts for generating surface acoustic waves are based on the placement of an interdigitated transducer at the side of a droplet,thus externally acting on the *** this case,the flow structure inside the droplet is controlled by the relatively large scale of the interdigitated transducer compared to the droplet,thus limiting the local control of the *** possibility to overcome this drawback is to reduce the size of the actuator such that a highly focused ultrasound transducer can induce localized acoustic streaming in ***,we introduce a micro‐spiral interdigitated transducer smaller than a droplet size that can generate micro‐size vortices inside the *** step enables a new way of controlling the flow inside the droplet,facilitating mixing,separation,aggregation,and patterning of *** study the characteristics of the acoustic streaming and the potential application of the flow for the separation and patterning of *** simplicity of the concept provides in‐droplet particle manipulation toolsets for many applications such as biosensing,microbiology,and point‐of‐care devices.

关键词： flow separation aggregation

来源：

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

Engineering complex systems applied to risk management in the mining industry

引用

International Journal of Mining science and Technology 2017年第4期27卷 611-616页

作者： Domingues maria s.Q. Baptista Adelina L.F. Diogo Miguel Tato CERENA - Centre for Natural Resources and the Environment Faculty of Engineering University of Porto Porto 4200-465 Portugal CLEGI-Centre Lusiada of Research and Development in Engineering and Industrial Management University Lusiada-North Vila Nova de Famalicao 4760-108 Portugal

Related to complexity, there is a wide diversity of concepts, ranging from ‘‘systemic" to ‘‘complex", implying a need for a unified terminology. Per different authors, the main drivers of complexity can be found in human behaviour and uncertainty. This complexity, structural or dynamic can be organizational, technological, or nested in their relationship. IsO international standard 31000:2009 definition of risk management ‘‘coordinated activities to direct and control an organization with regard to risk", when applied to economic sectors, industry, services, project, or activity, it requires the use of models or theories as guidelines. Therefore, as its basic elements comprehend human behaviour and/or uncertainty, risk management to be effective and adapted as much as possible to reality, must be operational within complex systems, as already demonstrated in different R&D environments. Risk management faces demanding challenges when approaching specific and endogenous needs, such as the mining sector. This paper presents a multivariable function analysis methodology approach based on complex system modelling and through real data corresponding to a risk management tool in the mining sector.

关键词： Risk Risk management Complex systems Mining Decision making

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

WOA-DNN for Intelligent Intrusion Detection and Classification in MANET services

引用

Intelligent Automation & soft Computing 2023年第2期35卷 1737-1751页

作者： C.Edwin singh s.maria Celestin Vigila Department of Computer science and Engineering Noorul Islam Centre for Higher EducationNagercoil629180India Department of Information Technology Associate ProfessorNoorul Islam Centre for Higher EducationNagercoil629180India

Mobile ad-hoc networks(MANET)are garnering a lot of attention because of their potential to provide low-cost solutions to real-world *** are more vulnerable to security *** in nodes,band-width limits,and centralized control and management are some of the ***(Intrusion Detection system)are the aid for detection,deter-mination,and identiﬁcation of illegal system activity such as use,copying,mod-iﬁcation,and destruction of *** address the identiﬁed issues,academics have begun to concentrate on building IDs-based machine learning *** learning is a type of machine learning that can produce exceptional *** study proposes that WOA-DNN be used to detect and classify incursions in MANET(Whale Optimized Deep Neural Network Model)WOA(Whale Opti-mization Algorithm)and DNN(Deep Neural Network)are used to optimize the preprocessed data to construct a system for classifying and predicting unantici-pated cyber-attacks that are both effective and efﬁ*** a result,secure data transport to other nodes is provided,preventing intruder *** invaders are found using the(Machine Learning)ML-IDs and WOA-DNN *** data is reduced in dimensionality using Principal Component Analysis(PCA),which improves the accuracy of the outputs.A classiﬁer is used in forward propagation to predict whether a result is normal or *** compare the traditional and proposed models’effectiveness,the accuracy of classiﬁcation,detection of the attack rate,precision rate,and F-Measure,Recall are *** proposed WOA-DNN model has higher assessment metrics and a 99.1%accuracy ***-DNN also has a greater assault detection rate than others,resulting in fewer false *** classiﬁcation accuracy of the proposed WOA-DNN model is 99.1%.

关键词： Intrusion detection system whale optimization algorithm deep neural network mobile ad-hoc networks forward and back propagation

来源：

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

Integrated Approach to Detect Cyberbullying Text:Mobile Device Forensics Data

引用

Computer systems science & Engineering 2022年第3期40卷 963-978页

作者： G.maria Jones s.Godfrey Winster P.Valarmathie Department of Computer science and Engineering Saveetha Engineering CollegeChennai602105India Department of Computer science and Engineering School of ComputingSRM Institute of Science and TechnologyChengalpattu603203India Department of Information Technology Saveetha Engineering CollegeChennai602105India

Mobile devices and social networks provide communication opportunities among the young generation,which increases vulnerability and cybercrimes activities.A recent survey reports that cyberbullying and cyberstalking constitute a developing issue among *** paper focuses on cyberbullying detection in mobile phone text by retrieving with the help of an oxygen forensics *** describe the data collection using forensics technique and a corpus of suspicious activities like cyberbullying annotation from mobile phones and carry out a sequence of binary classification experiments to determine cyberbullying *** use forensics techniques,Machine Learning(ML),and Deep Learning(DL)algorithms to exploit suspicious patterns to help the forensics investigation where every evidence contributes to the *** on a real-time dataset reveal better results for the detection of cyberbullying *** Random Forest in ML approach produces 87%of accuracy without sMOTE technique,whereas the value of F1score produces a good result with sMOTE *** LsTM has 92%of validation accuracy in the DL algorithm compared with Dense and BiLsTM algorithms.

关键词： Mobile forensics cyberbullying machine learning investigation model suspicious pattern

来源：

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

Contribution of glial cells to the neuroprotective effects triggered by repetitive magnetic stimulation:a systematic review

引用

Neural Regeneration Research 2024年第1期19卷 116-123页

作者： susana A.Ferreira Nuno Pinto Inês serrenho maria Vaz Pato Graça Baltazar Centro de Investigação em Ciências da saúde(CICs-UBI) Universidade da Beira InteriorCovilhãPortugal Faculdade de Ciências da saúde Universidade da Beira InteriorCovilhãPortugal GRUBI-systematic Reviews Group University of Beira InteriorCovilhãPortugal

Repetitive transcranial magnetic stimulation has been increasingly studied in different neurological diseases,and although most studies focus on its effects on neuronal cells,the contribution of nonneuronal cells to the improvement trigge red by repetitive transcranial magnetic stimulation in these diseases has been increasingly *** systematically review the effects of repetitive magnetic stimulation on non-neuronal cells two online *** of science and PubMed were searched fo r the effects of high-frequency-repetitive transcranial magnetic stimulation,low-frequencyrepetitive transcranial magnetic stimulation,intermittent theta-bu rst stimulation,continuous thetaburst stimulation,or repetitive magnetic stimulation on non-neuronal cells in models of disease and in unlesioned animals or cells.A total of 52 studies were *** protocol more frequently used was high-frequency-repetitive magnetic stimulation,and in models of disease,most studies report that high-frequency-repetitive magnetic stimulation led to a decrease in astrocyte and mic roglial reactivity,a decrease in the release of pro-inflammatory cyto kines,and an increase of oligodendrocyte *** trend towards decreased microglial and astrocyte reactivity as well as increased oligodendrocyte proliferation occurred with intermittent theta-burst stimulation and continuous theta-burst *** papers analyzed the low-frequency-repetitive transcranial magnetic stimulation protocol,and the parameters evaluated were restricted to the study of astrocyte reactivity and release of pro-inflammatory cytokines,repo rting the absence of effects on these paramete *** what concerns the use of magnetic stimulation in unlesioned animals or cells,most articles on all four types of stimulation reported a lack of *** is also important to point out that the studies were developed mostly in male rodents,not evaluating possible diffe rential effects of repetitive transcranial magneti

关键词： astrocyte glia high-frequency repetitive magnetic stimulation inflammation low-frequency repetitive magnetic stimulation microglia neurologic disorders oligodendrocyte repetitive magnetic stimulation theta-burst stimulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tuning structural,electrical,dielectric and magnetic properties of Mg-Cu-Co ferrites via dysprosium(Dy^(3+))doping

引用

Journal of Rare Earths 2024年第1期42卷 137-146,I0005页

作者： maria Akhtar M.s.Hasan Nasir Amin N.A.Morley Muhammad Imran Arshad Department of Physics Government College UniversityFaisalabad38000Pakistan Department of Physics The University of Lahore53700Pakistan Department of Materials science and Engineering The University of SheffieldS13JDUK Department of Physics&Astronomy University College LondonUK

In current research work,Dy3+substituted Mg0.5Cu0.25Co0.25Fe2-xDyxO4(0.0≤x≤0.04 with the step interval of 0.01)soft ferrites were synthesized by the sol-gel auto combustion *** prepared samples were characterized by the techniques using X-ray diffraction(XRD),scanning electron microscopy(sEM),energy dispersive X-ray spectroscopy(EDs),Fourier transform infrared(FTIR)spectroscopy,curre nt-voltage(Ⅰ-Ⅴ)measurement,LCR meter,vibrating sample magnetometer(VsM)and *** data reveal that the average crystallite size is 49.71 nm and the lattice constant is 0.83703 nm for sample x=*** non-uniform grain growth was demonstrated by micrographs and impurity-free elemental composition was observed from EDX *** DC resistivity has an increasing and decreasing trend in ferromagnetic and paramagnetic regions with an increase in ***,the high resistivity is observed with the order of 1010Ω·cm,and the activation energy is 0.944 eV for samples x=*** dielectric parameters including dielectric constant,dielectric losses,and impedance gradually decrease with the increase in frequency from 8 Hz to 8 *** minimum dielectric loss at high frequency is found for sample x=*** coercivity(Hc)and saturation magnetization(Ms)are found in the ranges of 520.82-544.02 Oe and 20.5841-21.1473 emu/g,*** observations confirm that dysprosium(x=0.03)doped MCC-soft ferrites may be applicable in transformer cores,microwave absorbance,and telecommunication devices.

关键词： soft ferrites DC resistivity Dielectric loss Impedance Coercivity Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：