检索结果-南通市图书馆

HOW MULTISPECIES INTERCROP ADVANTAGE RESPONDS TO WATER STRESS:A YIELDCOMPONENT ECOLOGICAL FRAMEWORK AND ITS EXPERIMENTAL APPLICATION

引用

Frontiers of Agricultural Science and Engineering 2021年第3期8卷 416-431页

作者： Luis GARCIA-BARRIOS yanus a.dechnik-vazquez The South Frontier College Panamerican and South Peripheric Avenues(w/o number)San Cristobal de las CasasChiapas 29290Mexico Pre-Planning Center of the Gulf Federal Electricity ComissionDiego de Ordaz 593Boca del RioVeracruz 94295Mexico

Absolute yield and land use efficiency can be higher in *** this phenomenon is common,it is not always the ***,these two benefits are frequently confused and do not necessarily occur *** choices become more complex when considering that multicrops are subject to strong spatial and temporal variation in average soil moisture,which will worsen with climate *** in agroecosystems is expected to buffer this impact by favoring resistance to reduced humidity,but there are few empirical/experimental studies to validate this *** is not clear if relatively higher multicrop yield and land use efficiency will persist in the face of reduced soil moisture,and how the relation between these benefits might ***,we present a relatively simple framework for analyzing this *** propose a relative multicrop resistance(RMR)index that captures all possible scenarios of absolute and relative multicrop overyield under water *** dissect the ecological components of RMR to understand the relation between higher multicrop yield and land use efficiency and the ecological causes of different overyield *** demonstrate the use of this framework with data from a 128 microplot greenhouse experiment with small annual crops,arranged as seven-species multicrops and their corresponding monocrops,all under two contrasting watering *** applied simple but robust statistical procedures to resulting data(based on bootstrap methods)to compare RMR,and its components,between different plants/plant *** also provide simple graphical tools to analyze the data.

关键词： agroecosystem sustainability crop overyielding intercrop drought resistance overyield ecological components

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

Temporal stability and directional change in a color cline of a marine snail from NW Spain

引用

Current Zoology 2024年第2期70卷 163-173页

作者： Juan Gefaell Ramon Vigo A.Honorato Gonzalez-vazquez Juan Galindo Emilio Rolan-Alvarez Centro de Investigacion Marina Universidade de VigoDepartamento de BioquimicaGenetica e Inmunologia36310 VigoSpain

The evolution and maintenance of color clines is a classic topic of research in evolutionary ***,studies analyzing the temporal dynamics of such clines are much less frequent,due to the difficulty of obtaining reliable data about past color distributions along environmen-tal *** this article,we describe a case of decades-long temporal stability and directional change in a color cline of the marine snail Littorina saxatilis along the coastal inlet of the Ria de Vigo(NW Spain).*** from this area shows a clear color cline with 3 distinct areas from the innermost to the more wave-exposed localities of the Ria:the inner,protected localities show an abundance of fawn-like individuals;the intermediate localities show a high diversity of colors;and the outer,wave-exposed localities show populations with a high frequency of a black and lineated *** compare data from the 1970s and 2022 in the same localities,showing that the cline has kept relatively stable for at least over half a century,except for some directional change and local variability in the frequency of certain *** regression analyses and biodiversity measures are presented to provide clues into the selective pressures that might be involved in the maintenance of this color *** research avenues to properly test the explanatory power of these selective agents as well as the possible origins of the cline are discussed.

关键词： clinal variation color polymorphism ecological gradient Littorina saxatilis natural selection wave exposure.

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

Bivariate Analysis of Pollutants Monthly Maxima in Mexico City Using Extreme Value Distributions and Copula

引用

Journal of Environmental Protection 2024年第7期15卷 796-826页

作者： Juan A. vazquez-Morales Eliane R. Rodrigues Hortensia J. Reyes-Cervantes Facultad de Ciencias Fsico-Matemticas Benemrita Universidad Autnoma de Puebla Puebla Mexico Instituto de Matemticas Universidad Nacional Autnoma de Mxico Mexico City Mexico

In the present work, we are interested in studying the joint distributions of pairs of the monthly maxima of the pollutants used by the environmental authorities in Mexico City to classify the air quality in the metropolitan area. In order to obtain the joint distributions a copula will be considered. Since we are analyzing the monthly maxima, the extreme value distributions of Weibull and Fréchet are taken into account. Using these two distributions as marginal distributions in the copula a Bayesian inference was made in order to estimate the parameters of both distributions and also the association parameters appearing in the copula model. The pollutants taken into account are ozone, nitrogen dioxide, sulphur dioxide, carbon monoxide, and particulate matter with diameters smaller than 10 and 2.5 microns obtained from the Mexico City monitoring network. The estimation was performed by taking samples of the parameters generated through a Markov chain Monte Carlo algorithm implemented using the software OpenBugs. Once the algorithm is implemented it is applied to the pairs of pollutants where one of the coordinates of the pair is ozone and the other varies on the set of the remaining pollutants. Depending on the pollutant and the region where they were collected, different results were obtained. Hence, in some cases we have that the best model is that where we have a Fréchet distribution as the marginal distribution for the measurements of both pollutants and in others the most suitable model is the one assuming a Fréchet for ozone and a Weibull for the other pollutant. Results show that, in the present case, the estimated association parameter is a good representation to the correlation parameters between the pair of pollutants analyzed. Additionally, it is a straightforward task to obtain these correlation parameters from the corresponding association parameters.

关键词： Copula Extreme Value Distribution Bayesian Inference Air Pollution Mexico City

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

Functional lumen imaging probe use in a high-volume practice:Practical and technical implications

引用

World Journal of Gastrointestinal Endoscopy 2024年第7期16卷 396-405页

作者： Yan Jiang Raul vazquez-Reyes Afrin Kamal Thomas Zikos George Triadafilopoulos John O Clarke Division of Gastroenterology and Hepatology Stanford University School of MedicineRedwoodCA 94063United States

BACKGROUND The functional lumen imaging probe(FLIP)is a Food and Drug Administration approved tool to aid the diagnosis and management of esophageal ***,widespread adoption of FLIP remains limited and its utility in highvolume practices remains *** To analyze large sample data on clinical use of FLIP and provide insight on several technical aspects when performing *** We conducted a retrospective comparative and descriptive analysis of FLIP procedures performed by a single provider at an academic medical *** was a total of 398 FLIP procedures *** medical records were reviewed and data regarding demographics and procedural details were *** tests,including chi-squared,t-test,and multivariable logistic and linear regression,were *** There was an increase in FLIP cases with each successive time period of 13 months(n=68,146,184,respectively)with notable rises specifically for indications of dysphagia and gastroesophageal reflux *** was a shift toward use of the longer FLIP balloon catheter for diagnostic purposes(overall 70.4%vs 29.6%,P<0.01).Many cases(42.8%)were performed in conjunction with other diagnostics/interventions,such as dilation and wireless pH probe *** were nearly equally performed with anesthesia vs moderate sedation(51.4%anesthesia),with no major *** who had anesthesia were less likely to have recurrent antegrade contractions[odds ratio(OR)=0.4,95%CI:0.3-0.8]and were also more likely to have absent contractility(OR=2.4,95%CI:1.3-CONCLUSION FLIP cases have increased in our practice with expanding indications for its *** limited normative data,providers should be aware of several potential technical issues,including the possible impact of sedation choice when assessing esophageal motility patterns.

关键词： Gastroenterology Endoscopy Functional lumen imaging probe Esophagus Motility

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

Multi-omic study to unmask genes involved in prostate cancer development in amulti-case family

引用

Cancer Communications 2024年第3期44卷 443-447页

作者： Lucia Chica-Redecillas Sergio Cuenca-Lopez Eduardo Andres-Leon Laura Carmen Terron-Camero Blanca Cano-Gutierrez Jose Manuel Cozar Jose Antonio Lorente Fernando vazquez-Alonso Luis Javier Martinez-Gonzalez Maria Jesus Alvarez-Cubero GENYO Centre for Genomics and Oncological ResearchPfizerUniversity of GranadaAndalusian Regional GovernmentPTS GranadaGranadaGranadaSpain Department of Biochemistry Molecular Biology III and ImmunologyFaculty of MedicineUniversity of GranadaPTS GranadaGranadaGranadaSpain Bioinformatics Unit Institute of Parasitology and Biomedicine“López-Neyra”Spanish National Research CouncilGranadaGranadaSpain Nursery Service.University Hospital Clínico San Cecilio GranadaGranadaSpain Urology Department University Hospital Virgen de las NievesGranadaGranadaSpain Legal Medicine and Toxicology Department Faculty of MedicineUniversity of GranadaPTS GranadaGranadaGranadaSpain Ibs Biosanitary Research InstituteGranadaGranadaSpain

Dear Editor,Hereditary prostate cancer(PC)comprises 5%-10%of all PC *** increased risk of PC in menwith a family his-tory of the disease is well known and is commonly caused by germline mutations,leading to clinical guidelines men-tioning various genes for identifying high-risk ***,the complex inheritance patterns involvingmul-tiple single nucleotide polymorphisms(SNPs)make it a genetically heterogeneous disease,with genetic testing still in its early stages.

关键词： cancer clinical cases

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

Evaluation of Human Impacts on Bartlett Pond Ecosystem, Laredo, Southern Texas, USA, through Empirical Modeling

引用

Journal of Environmental Protection 2024年第4期15卷 497-526页

作者： Maya P. Bhatt Amede Rubio Ganesh B. Malla Cristobal Lopez Virginia Morales Erick vazquez Cano David Marquez Orlando Berumen Alvarez Alfred Addo-Mensah Department of Biology and Chemistry Texas A&M International University Laredo USA Department of Mathematics Computer Geology and Physics University of Cincinnati-Clermont College Batavia USA

The trace elements chemistry of Bartlett Pond, a small shallow wetland pond in Laredo, Southern Texas, was sampled to evaluate the dynamics of trace elements impacts on water quality and ecosystems ecology of the pond. Two types of fish (bass and tilapia) were also sampled to see the trace element accumulation in different parts of their body. The concentrations of trace elements in water samples were found in the following order: Fe ≫Sb > Pb > As ≫Co > Tl > Cr > Cd within Bartlett Pond. Overall, the water quality of the pond is unacceptable for drinking and any other purposes as trace element concentrations (e.g. As, Cd, Co, Cr, Pb, Fe, Sb and Tl) are exceedingly higher (several fold) than the WHO and US EPA guidelines. Predictive and correlation analysis shows that most trace elements exhibit a strong positive correlation among them indicating the same anthropogenic sources and biogeochemical processes regulate these trace elements within the pond. Distributions of the trace elements in water exhibit different shapes mostly as positively skewed distribution for As, Cd, Co, Cr, and Tl, symmetrical distribution for Fe and almost symmetrical distribution for Pb and Sb. Concentrations of As, Co and Tl accumulated much higher in different parts of the Bass than Tilapia fish. The concentrations of As, Tl, Co, and Sb appeared significantly higher in different parts of the body of both Bass and Tilapia than the maximum SRM certified values. Accumulation of these contaminants in fish tissues pose increased health risks to humans who consume these contaminated fish although fishing is prohibited. Anthropogenic activities in the region primarily degrade the whole pond ecosystem ecology of the Bartlett Pond and waters of this pond to be not recommended for any use. These findings may be useful for the scientific community and concerned authorities to improve understanding about these precious natural resources and conservation of the ecosystem ecology.

关键词： Trace Elements Bartlett Pond Laredo Southern Texas Wetlands Ecosystem Ecology

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

Targeting collective behaviors of transplanted retinal cells as a strategy to improve cellular integration

引用

Neural Regeneration Research 2022年第6期17卷 1271-1272页

作者： Miles Markey Maribel vazquez Department of Biomedical Engineering RutgersThe State University of New JerseyPiscatawayNJUSA

Introduction:The rapidly growing field of regenerative medicine incorporates fundamental principles of stem cell biology and biomedical engineering to repair tissues damaged by genetic disorder,degeneration,or traumatic *** global market for stem cell therapies is expanding at an accelerating rate and projected to triple to over 100 Billion USD by the end of the decade(No author listed,2019),as per Figure 1A.

关键词： degeneration collective traumatic

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

Sliding Mode Control in Power Converters and Drives: A Review

引用

IEEE/CAA Journal of Automatica Sinica 2022年第3期9卷 392-406页

作者： Ligang Wu Jianxing Liu Sergio vazquez Sudip K.Mazumder IEEE Department of Control Science and Engineering Harbin Institute of TechnologyHarbin 150001China Electronic Engineering Department Universidad de Sevilla41092 SevillaSpain Electrical and Computer Engineering Department University of Illinois ChicagoChicagoIL 60607 USA

Sliding mode control(SMC)has been studied since the 1950s and widely used in practical applications due to its insensitivity to matched *** aim of this paper is to present a review of SMC describing the key developments and examining the new trends and challenges for its application to power electronic *** fundamental theory of SMC is briefly reviewed and the key technical problems associated with the implementation of SMC to power converters and drives,such chattering phenomenon and variable switching frequency,are discussed and *** recent developments in SMC systems,future challenges and perspectives of SMC for power converters are discussed.

关键词： Motor drive power electronics systems sliding mode control

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

Opportunities for agent based modeling of retinal stem cell transplantation

引用

Neural Regeneration Research 2022年第9期17卷 1978-1980页

作者： Larissa M.DePamphilis Troy Shinbrot Maribel vazquez Department of Biomedical Engineering RutgersThe State University of New JerseyPiscatawayNJUSA

Late stage blindness and visual impairment(BVI)affects over 400 mi l l ion adul ts *** disabilities severely impact the ability of adults to function independently,reduce their quality of life,and worsen socio-economic burdens on health care ***,the World Health Organization projects worldwide BVI from degenerated retina to more than double by the year 2050(Bourne et al.,2021).To understand the clinical problem,consider Figure 1A depicting the retina’s seven neuronal cell types that interconnect across three nuclear *** photoreceptors of the outer nuclear layer(ONL)are light sensitive neurons that absorb and convert photons into bioelectrical signals.

关键词： Figure outer convert

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

A deep neural network regressor for phase constitution estimation in the high entropy alloy system Al-Co-Cr-Fe-Mn-Nb-Ni

引用

npj Computational Materials 2023年第1期9卷 1661-1674页

作者： G.vazquez S.Chakravarty R.Gurrola R.Arróyave Department of Materials Science and Engineering Texas A&M UniversityCollege Station 77843 TXUSA Department of Mechanical Engineering Texas A&M UniversityCollege Station 77843 TXUSA Department of Industrial and Systems Engineering Texas A&M UniversityCollege Station 77843 TXUSA

High Entropy Alloys(HEAs)are composed of more than one principal element and constitute a major paradigm in metals *** HEA space is vast and an exhaustive exploration is ***,a thorough estimation of the phases present in the HEA is of paramount importance for alloy *** Learning presents a feasible and non-expensive method for predicting possible new HEAs on-the-fly.A deep neural network(DNN)model for the elemental system of:Mn,Ni,Fe,Al,Cr,Nb,and Co is developed using a dataset generated by high-throughput computational thermodynamic calculations using *** features list used for the neural network is developed based on literature and freely available databases.A feature significance analysis matches the reported HEAs phase constitution trends on elemental properties and further expands it by providing so far-overlooked *** final regressor has a coefficient of determination(r^(2))greater than 0.96 for identifying the most recurrent phases and the functionality is tested by running optimization tasks that simulate those required in alloy *** DNN developed constitutes an example of an emulator that can be used in fast,real-time materials discovery/design tasks.

关键词： alloy neural network

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

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：