检索结果-南通市图书馆

H∞position transfer and regulation for floating offshore wind turbines

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Control Theory and Technology 2020年第3期18卷 231-245页

作者： eduardo Eribert ESCoBAR AQUINo Ryozo NAGAMUNE Department of Mechanical Engineering The University of British ColumbiaVancouverBC V671Z4Canada

This paper proposes H∞controller design for platform position transfer and regulation of floating offshore wind *** platform movability of floating wind turbines can be utilized in mitigating the wake effect in the wind farm,thereby maximizing the wind farm's total power capture and *** controller is designed so that aerodynamic force is adjusted to meet the three objectives simultaneously,that is,1)to generate the desired electrical power level,2)to achieve the desired platform position,and 3)to suppress the platform *** acquire sufficient aerodynamic force to move the heavy platform,the pitch-to-stall blade pitching strategy is taken instead of the commonly-used pitch-to-feather *** desired power level is attained by the standard constant-power strategy for the generator torque,while Hstate-feedback control of blade pitch and nacelle yaw angles is adopted for the position regulation and platform oscillation *** constants for the H∞controller design are adjusted to take the trade-off between the position regulation accuracy and the platform motion *** demonstrate the efficiency of the proposed controler,a virtual 5-MW semi-submersible wind turbine is *** results show that the designed H∞controller successfully accomplishes the platform position transfer and regulation as well as the platform oscillation reduction against wind and wave disturbances,and that it outperforms a previously-proposed linear quadratic controller with an integrator.

关键词： offshore wind farm wind turbine position power regulation disturbance rejection H∞control

Sperm quality in mice acutely treated with parathion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2000年第2期2卷 147-150页

作者： Cristian Sobarzo eduardo Bustos-obregon Faculty of Basic Sciences Catholic University of Temuco and Biology of Reproduction Unit Program of Morphology ICBM Faculty of Medicine University of Chile. Santiage 7 Chile.Faculty of Basic Sciences Catholic University of Temuco and Biology of Reproduction Unit Program of Morphology ICBM Faculty of Medicine University of Chile. Santiage 7 Chile.

Aim: To investigate the toxic effect of a single injection of the organophosphorous agropesticide, parathion, on sper-matogenesis in immature male mice. Methods: Seven-day old mice received a single injection of parathion intraperi-toneally at a dose of 1/3 LD_50. The epididymal sperm count, sperm morphology and chromatin thermal stability wereanalyzed 28 and 50 days after injection. Results: Sperm counts were decreased and teratozoospermia and thermal de-naturation of DNA increased after parathion injection. Sperm parameters were changed to a greater extent in younger an-imals, denoting a higher lability of spermatogenic process at its beginning. The damages could recover a long time afterparathion administration. Conclusion: organophosphorous agropesticides are testicular toxicants, eliciting reversiblecytotoxic and cytogenetic alterations in germ cells.

关键词： epididymis spermatozoa organophosphorous compounds agropesticides spermatogenesis

Antimicrobial and synergistic effects of lemongrass and geranium essential oils against Streptococcus mutans,Staphylococcus aureus,and Candida spp.

在线全文

学校读者我要写书评

暂无评论

World Journal of Critical Care Medicine 2024年第3期13卷 63-74页

作者： Patrícia Michelle Nagai de Lima Thaís Cristine Pereira Lara Steffany de Carvalho Letícia Ferreira dos Santos Carlos eduardo Rocha oliveira Lucas de Paula Ramos Maria Cristina Marcucci Amjad Abu Hasna Luciane Dias de oliveira Department of Biosciences and oral Diagnosis Institute of Science and TechnologySão Paulo State UniversitySão Josédos Campos 12245000SPBrazil Anhembi Morumbi University School of MedicineSão Josédos Campos 12230-002SPBrazil Department of Restorative Dentistry Endodontics DivisionInstitute of Science and TechnologySão Paulo State UniversitySão Josédos Campos 12245000São PauloBrazil

BACKGRoUND The oral cavity harbors more than 700 species of bacteria,which play crucial roles in the development of various oral diseases including caries,endodontic infection,periodontal infection,and diverse oral *** To investigate the antimicrobial action of Cymbopogon Schoenanthus and Pelargonium graveolens essential oils against Streptococcus mutans,Staphylococcus aureus,Candida albicans,***,and *** Minimum microbicidal concentration was determined following Clinical and Laboratory Standards Institute *** synergistic antimicrobial activity was evaluated using the Broth microdilution checkerboard method,and the antibiofilm activity was evaluated with the 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide *** were analyzed by one-way analysis of variance followed by the Tukey post-hoc test(P≤0.05).RESULTS *** and *** essential oils were as effective as 0.12%chlorhexidine against *** and *** monotypic biofilms after 24 *** 24 h *** essential oil at 0.25%was more effective than the nystatin group,and *** essential oil at 0.25%was as effective as the nystatin *** *** and *** essential oils are effective against ***,***,***,***,and *** at different concentrations after 5 min and 24 h.

关键词： Antifungal effect Lemongrass Geranium Candida albicans Candida dubliniensis Candida krusei Staphylococcus aureus Streptococcus mutans

Provenance and drainage system of the Early Cretaceous volcanic detritus in the Himalaya as constrained by detrital zircon geochronology

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 Palaeogeography 2015年第1期4卷 85-98页

作者： Xiu-Mian Hu eduardo Garzanti Wei An State Key Laboratory of Mineral Deposits Research School of Earth Sciences and Engineering Nanjing University Department of Earth and Environmental Sciences Università di Milano?BicoccaMilano 20126 Italy

The age range of the major intra-plate volcanic event that affected the northern Indian margin in the Early Cretaceous is here defined precisely by detrital zircon geochronology. U-Pb ages of Early Cretaceous detrital zircons found in the Cretaceous to the Paleocene sandstones cluster mainly between 142 Ma and 123 Ma in the northern Tethys Himalayan unit, and between 140 Ma and 116 Ma in the southern Tethys Himalayan unit. The youngest and oldest detrital zircons within this group indicate that volcanism in the source areas started in the latest Jurassic and ended by the early Albian. Stratigraphic data indicate that volcaniclastic sedimentation began significantly earlier in southern Tibet （Tithonian） than in Nepal （Valangin- ian）, and considerably later in Spiti and Zanskar （Aptian/AIbian） to the west. This apparent westward migration of magmatism was explained with progressive westward propagation of extensional/transtensional tectonic activity and development of fractures cutting deeply across the Indian continental margin crust. However, detrital zircon geochronology provides no indication of heterochroneity in magmatic activity in the source areas from east to west, and thus lends little support to such a scenario. Westward migration of volcaniclastic sedimentation may thus reflect instead the westward progradation of major drainage systems supplying volcanic detritus sourced from the same volcanic centers in the east. Development of multiple radial drainage away from the domal surface uplift associated with magmatic upwelling, as observed for most large igneous provinces around the world, may also explain why U-Pb ages of detrital zircons tend to cluster around 133-132 Ma （the age of the Cornel igneous province） in Tethys Himalayan units, but around 118-117 Ma （the age of the Rajmahal igneous province） in Lesser Himalayan units.

关键词： northern Indian margin Cretaceous Himalayan orogen volcaniclastic detri-tus drainage system zircon geochronology palaeogeography

A Data Security Framework for Cloud Computing Services

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2021年第5期37卷 203-218页

作者： Luis-eduardo Bautista-Villalpando Alain Abran Department of Electronic Systems Autonomous University of AguascalientesAguascalientes20131Mexico Department of Software Engineering and Information Technology ETSUniversity of QuebecMontrealH3C 1K3Canada

Cyberattacks are difficult to prevent because the targeted companies and organizations are often relying on new and fundamentally insecure cloudbased technologies,such as the Internet of *** increasing industry adoption and migration of traditional computing services to the cloud,one of the main challenges in cybersecurity is to provide mechanisms to secure these *** work proposes a Data Security Framework for cloud computing services(CCS)that evaluates and improves CCS data security from a software engineering perspective by evaluating the levels of security within the cloud computing paradigm using engineering methods and techniques applied to *** framework is developed by means of a methodology based on a heuristic theory that incorporates knowledge generated by existing works as well as the experience of their *** paper presents the design details of the framework,which consists of three stages:identification of data security requirements,management of data security risks and evaluation of data security performance in CCS.

关键词： Cloud computing services computer security data security data security requirements data risk data security measurement

Role of gastrin-peptides in Barrett's and colorectal carcinogenesis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2012年第45期18卷 6560-6570页

作者： eduardo Chueca Angel Lanas Elena Piazuelo IIS Aragon Aragon Institute of Health Sciences50009 ZaragozaSpain Networked Biomedical Research Center Hepatic and Digestive Diseases(CIBERehd) C/Corcega 180 bajos dcha08036 BarcelonaSpain Department of Medicine Psychiatry and DermatologyMedical University of ZaragozaC/Domingo Miral50009 ZaragozaSpain Service of Gastroenterology Hospital Clinico UniversitarioAvda.San Juan Bosco 1550009 ZaragozaSpain

Gastrin is the main hormone responsible for the stimulation of gastric acid secretion;in addition,gastrin and its derivatives exert proliferative and antiapoptotic effects on several cell *** synthesis and secretion are increased in certain situations,for example,when proton pump inhibitors are *** impact of sustained hypergastrinemia is currently being *** vitro experiments and animal models have shown that prolonged hypergastrinemia may be related with higher cancer rates;although,this relationship is less clear in human *** gastrin levels have been shown to cause hyperplasia of several cell types;yet,the risk for developing cancer seems to be the same in normo-and hypergastrinemic *** tumors also produce their own gastrin,which can act in an autocrine manner promoting tumor *** cancers are extremely dependent on gastrin to *** research focused only on the effects of amidated gastrins,but there has been an interest in intermediates of gastrin in the last few *** intermediates aren't biologically inactive;in fact,they may exert greater effects on proliferation and apoptosis than the completely processed *** certain gastrin overproduction states,they are the most abundant gastrin peptides *** purpose of this review is to examine the gastrin biosynthesis process and to summarize the results from different studies evaluating the production,levels,and effects of the main forms of gastrin in different overexpression states and their possible relationship with Barrett's and colorectal carcinogenesis.

关键词： Gastrin Progastrin Glycine-extended gas-trins C-terminal flanking peptide Hypergastrinemia,Proton pump inhibitors Colorectal cancer Esophagealadenocarcinoma Barrett's esophagus

Challenges in microRNAs’ targetome prediction and validation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2019年第10期14卷 1672-1677页

作者： Jesus eduardo Rojo Arias Volker Busskamp Center for Regenerative Therapies (CRTD) Technische Universit?t Dresden

MicroRNAs(miRNAs)are small RNA molecules with important roles in post-transcriptional regulation of gene *** recent years,the predicted number of miRNAs has skyrocketed,largely as a consequence of high-throughput sequencing technologies becoming *** dramatic increase in miRNA candidates poses multiple challenges in terms of data deposition,curation,and *** multiple databases containing miRNA annotations and targets have been developed,ensuring data quality by validating miRNA-target interactions requires the efforts of the research *** order to generate databases containing biologically active miRNAs,it is imperative to overcome a multitude of hurdles,including restricted miRNA expression patterns,distinct miRNA biogenesis machineries,and divergent miRNA-mRNA interaction *** the present review,we discuss recent advances and limitations in miRNA prediction,identification,and ***,we focus on the most enriched neuronal miRNA,miR-124,and its gene regulatory network in human neurons,which has been revealed using a combined computational and experimental approach.

关键词： miRNAs miRNA regulation miR-124 wTo analysis miRNA biogenesis miRNA prediction miRNA identification miRNA validation

Sounds Synthesis with Slime Mould of Physarum Polycephalum

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2011年第2期8卷 107-113页

作者： eduardo R. Miranda Andrew Adamatzky Jeff Jones Interdisciplinary Centre.for Computer Music Research (ICCMR) University of Plymouth Plymouth PL48AA UK Unconventional Computing Centre University of the West of England Bristol BSI 61QY UK

This paper introduces a novel application of bionic engineering： a bionic musical instrument using Physarum polycephalum. Physarum polycephalum is a huge single cell with thousands of nuclei, which behaves like a giant amoeba. During its foraging behavior this plasmodium produces electrical activity corresponding to different physiological states. We developed a method to render sounds from such electrical activity and thus represent spatio-temporal behavior of slime mould in a form apprehended auditorily. The electrical activity is captured by various electrodes placed on a Petri dish containing the cultured slime mold. Sounds are synthesized by a bank of parallel sinusoidal oscillators connected to the electrodes. Each electrode is responsible for one partial of the spectrum of the resulting sound. The behavior of the slime mould can be controlled to produce different timbres.

关键词： Physarum polycephalum bionic musical instrument unconventional computing sound synthesis sonification

Foliar application of rare earth elements on soybean(Glycine max(L)):Effects on biometrics and characterization of phytotoxicity

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 Rare Earths 2020年第10期38卷 1131-1139,I0005页

作者： eduardo S.Rodrigues Gabriel S.Montanha Joao P.R.Marques eduardo de Almeida Lauren N.M.Yabuki Amauri A.Menegario Hudson W.Pereira de Carvalho Laboratory of Nuclear Instrumentation(LIN) Center for Nuclear Energy in Agriculture(CENA)University of Sao Paulo(USP)PiracicabaSP13416-000Brazil Environmental Studies Center Sao Paulo State University(UNESP)Rio ClaroSP13506-900Brazil

This study aims at investigating the effects of foliar application of aqueous solutions of La3+and Ce3+nitrates on soybean plants(Glycine max).First,we observe that Triton HW 1000 surfactant at 0.01 vol%reduces droplets contact angle and increases their drying *** greenhouse conditions,the foliar treatments do not affect chlorophyll content,plant height,number of leaves,number of pods,number of seeds per pod,and average seed ***,the treatments induce phytotoxicity since foliar injuries appear after the *** X-ray fluorescence spectroscopy combined to scanning electron microscopy shows that the leaf lesions are positively correlated to accumulation of Ce and La on the leaf surface and also promote structural alteration to the epidermal cells.X-ray absorption near edge structure shows that the La and Ce nitrates are partially bio transformed into oxides by the leaves which might explain the harmful effects.

关键词： Leaf fertilization Rare earth elements Soybean X-ray fluorescence spectroscopy X-ray absorption spectroscopy