检索结果-南通市图书馆

Efficiently searching extreme mechanical properties via boundless objective-free exploration and minimal first-principles calculations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

npj Computational Materials 2022年第1期8卷 1336-1347页

作者： Joshua Ojih Mohammed Al-Fahdi Alejandro David rodriguez Kamal Choudhary Ming Hu Department of Mechanical Engineering University of South CarolinaColumbiaSC29208USA Materials Science and Engineering Division National Institute of Standards and TechnologyGaithersburgMD20899USA

Despite the machine learning(ML)methods have been largely used recently,the predicted materials properties usually cannot exceed the range of original training *** deployed a boundless objective-free exploration approach to combine traditional ML and density functional theory(DFT)in searching extreme material *** combination not only improves the efficiency for screening large-scale materials with minimal DFT inquiry,but also yields properties beyond original training *** use Stein novelty to recommend outliers and then verify using *** data are then added into the training dataset for next round *** test the loop of training-recommendation-validation in mechanical property *** screening 85,707 crystal structures,we identify 21 ultrahigh hardness structures and 11 negative Poisson’s ratio *** algorithm is very promising for future materials discovery that can push materials properties to the limit with minimal DFT calculations on only~1%of the structures in the screening pool.

关键词： extreme properties minimal

A Survey on Model Predictive Control of DFIGs in Wind Energy Conversion Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第3期10卷 1085-1104页

作者： Shuo Yan Junyu Chen Minghao Wang Yongheng Yang Jose M.rodriguez STEM College RMIT UniversityMelbourneAustralia Hong Kong Polytechnic University Hong KongChina State Key Laboratory of Internet of Things for Smart City(UM) Department of Electrical and Computer EngineeringUniversity of MacaoMacaoChina College of Electrical Engineering Zhejiang UniversityHangzhou 310027China Universidad San Sebastin Campus BellavistaSantiago de ChileCLSantiago de Chile 000000Chile IEEE

This paper presents a comprehensive study on the model predictive control(MPC)of doubly fed induction generators(DFIG)in wind energy conversion systems(WECS);in particular the MPC of the rotor side *** general principle of prevalent MPC strategies is discussed to introduce the theoretical framework in the first ***,mainstream and high-performance MPC methods of DFIGs have been identified as model predictive current control(MPCC),model predictive torque control(MPTC),and model predictive power control(MPPC).Starting from analyzing dynamic models,these MPC strategies are investigated in terms of operating principles and technical *** paper further investigates implementation of MPC strategies in unbalanced *** on the quantitative and qualitative analysis of several case studies,performance of various MPC schemes is compared and their special features are *** for designing MPC strategies of DFIGs in WECS are provided.

关键词： Doubly fed induction generator(DFIG) model predictive control(MPC) wind energy

Homotypic Vacuole Fusion Requires VTI11 and Is Regulated by Phosphoinositides

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2014年第6期7卷 1026-1040页

作者： Sang Won Han Maria Fernanda.rodriguez-Welsh Marcela Rojas-Pierce Department of Plant and Microbial Biology North Carolina State University Raleigh NC 27695 USA

Most plant cells contain a large central vacuole that is essential to maintain cellular turgor. We report a new mutant allele of VTI11 that implicates the SNARE protein VTI11 in homotypic fusion of protein storage and lytic vacuoles. Fusion of the multiple vacuoles present in vtill mutants could be induced by treatment with Wortmannin and LY294002, which are inhibitors of Phosphatidylinositol 3-Kinase （PI3K）. We provide evidence that Phosphatidylinositol 3-Phosphate （Ptdlns（3）P） regulates vacuole fusion in vtill mutants, and that fusion of these vacuoles requires intact microtubules and actin filaments. Finally, we show that Wortmannin also induced the fusion of guard cell vacuoles in fava beans, where vacuoles are naturally fragmented after ABA-induced stomata closure. These results suggest a ubiquitous role of phosphoinositides in vacuole fusion, both during the development of the large central vacuole and during the dynamic vacuole remodeling that occurs as part of stomata movements.

关键词： vacuole SNARE phosphoinositides membrane fusion Wortmannin.

Designing price-contingent vegetable rotation schedules using agent-based simulation

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 Integrative Agriculture 2018年第2期17卷 461-472页

作者： LI Jing Daniel rodriguez WANG Hao-xiang WU Liu-san Faculty of Engineering Nanjing Agricultural University Queensland Alliance for Agriculture and Food Innovation (QAAFI) University of Queensland

Chinese vegetable production cooperatives supply their members, mostly smallholder farmers, with a rotation schedule for the year. Since vegetable prices are not stable throughout the year, designing a rotation schedule that maximizes expected profits, distributes farmers＇ profits more equitably, maintains the diversity of produce in the market, and reduces the risk of pests and diseases, requires adaptive, price-contingent rotation schedules（here, called ＂self-adaptive adjustment＂）. This study uses an agent-based simulation（ABS） to design self-adaptive rotation schedules that deliver these aims. The selfadaptive adjustment strategy was more profitable for farmers when faced with price volatility, and more equitable as well. This work provides a decision-support tool for managers of Chinese vegetable production cooperatives to provide farmers with more profitable and equitable rotation schedules.

关键词： operation research in agriculture self-adaptive algorithm cooperatives market fluctuation

Abscisic Acid, High-Light, and Oxidative Stress Down-Regulate a Photosynthetic Gene via a Promoter Motif Not Involved in Phytochrome- Mediated Transcriptional Regulation

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

Molecular Plant 2008年第1期1卷 75-83页

作者： Roberto J. Staneloni Maria Jose rodriguez-Batiller Jorge J. Casal Fundacion Instituto Leloir and IIBBA-CONICET C1405BWE-Buenos Aires Argentina IFEVA Facultad de Agronomia Universidad de Buenos Aires and CONICET 1417 Buenos Aires Argentina

In etiolated seedlings, light perceived by phytochrome promotes the expression of light-harvesting chlorophyll a/b protein of photosystem Ⅱ （Lhcb） genes. However, excess of photosynthetically active radiation can reduce Lhcb expression. Here, we investigate the convergence and divergence of phytochrome, high-light stress and abscisic acid （ABA） signaling, which could connect these processes. Etiolated Arabidopsis thaliana seedlings bearing an Lhcb promoter fused to a reporter were exposed to continuous far-red light to activate phytochrome and not photosynthesis, and treated with ABA. We identified a cis-acting region of the promoter required for down-regulation by ABA. This region contains a CCAC sequence recently found to be necessary for ABI4-binding to an Lhcb promoter. However, we did not find a G-box-binding core motif often associated with the ABI4-binding site in genes promoted by light and repressed by ABI4. Mutations involving this motif also impaired the responses to reduced water potential, the response to high photosynthetic light and the response to methyl viologen but not the response to low temperature or to Norflurazon. We propose a model based on current and previous findings, in which hydrogen peroxide produced in the chloroplasts under high light conditions inter- acts with the ABA signaling network to regulate Lhcb expression. Since the mutation that affects high-light and methyl viologen responses does not affect phytochrome-mediated responses, the regulation by retrograde and phytochrome signaling can finally be separated at the target promoter level.

关键词： .cis-Acting Abscisic ABA signaling High-Light and Oxidative Lhcb expression high-light stress Lhcb promoter

Plant Proteins Are Smaller Because They Are Encoded by Fewer Exons than Animal Proteins

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2016年第6期14卷 357-370页

作者： Obed Ramirez-Sachez Paulino Perez-rodriguez Luis Delaye Axel Tiessen Genetic Engineering Department CINVESTAV Unidad IrapuatoIrapuatoCP 36821Mexico Colegio de Postgraduados Campus MontecilloTexcocoCP 56230Mexico

Protein size is an important biochemical feature since longer proteins can harbor more domains and therefore can display more biological functionalities than shorter proteins. We found remarkable differences in protein length, exon structure, and domain count among different phylo- genetic lineages. While eukaryotic proteins have an average size of 472 amino acid residues （aa）, average protein sizes in plant genomes are smaller than those of animals and fungi. Proteins unique to plants are -81 aa shorter than plant proteins conserved among other eukaryotic lineages. The smaller average size of plant proteins could neither be explained by endosymbiosis nor subcellular compartmentation nor exon size, but rather due to exon number. Metazoan proteins are encoded on average by -10 exons of small size [-176 nucleotides （nt）]. Streptophyta have on average only -5.7 exons of medium size （-230 nt）. Multicellular species code for large proteins by increasing the exon number, while most unicellular organisms employ rather larger exons （〉 400 nt）. Among subcellular compartments, membrane proteins are the largest （-520 aa）, whereas the smallest proteins correspond to the gene ontology group of ribosome （-240 aa）. Plant genes are encoded by half the number of exons and also contain fewer domains than animal proteins on average. Interestingly, endosymbiotic proteins that migrated to the plant nucleus became larger than their cyanobacterial orthologs. We thus conclude that plants have proteins larger than bacteria but smaller than animals or fungi. Compared to the average of eukaryotic species, plants have -34% more but -20% smaller proteins. This suggests that photosynthetic organisms are unique and deserve therefore special attention with regard to the evolutionary forces acting on their genomes and proteomes.

关键词： Digital proteome Eukarya Evolution Viridiplantae Polypeptide length

OTB-morph:One-time Biometrics via Morphing

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

Machine Intelligence Research 2023年第6期20卷 855-871页

作者： Mahdi Ghafourian Julian Fierrez Ruben Vera.rodriguez Aythami Morales Ignacio Serna Biometrics and Data Pattern Analytics Laboratory(BiDA Lab) Universidad Autonoma de MadridMadrid28049Spain

Cancelable biometrics are a group of techniques to transform the input biometric to an irreversible feature intentionally using a transformation function and usually a key in order to provide security and privacy in biometric recognition *** transformation is repeatable enabling subsequent biometric *** paper introduces a new idea to be exploited as a transformation function for cancelable biometrics aimed at protecting templates against iterative optimization *** proposed scheme is based on time-varying keys(random biometrics in our case)and morphing *** experimental implementation of the proposed scheme is given for face *** results confirm that the proposed approach is able to withstand leakage attacks while improving the recognition performance.

关键词： Biometrics face recognition template protection morphing security

Mortality rate after total knee arthroplasty or total hip arthroplasty in patients with a history of liver transplant

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 Orthopedics 2024年第4期15卷 310-311页

作者： E Carlos rodriguez-Merchan Department of Orthopedic Surgery La Paz University Hospital-IdiPazMadrid 28046Spain

In this editorial I comment on the article by Ahmed et al published in a recent issue of the World J Orthop 2023;14:*** is well known that patients who have undergone a liver transplant(LT)may need to have a total hip arthroplasty(THA)or total knee arthroplasty(TKA)*** et al stated that the mortality rate in these patients was similar to the one of the general ***,there are three articles previously published that found higher mortality in LT patients who experienced THA/TKA than in the general population(individuals without LT).Therefore,in this Editorial I would like to point out that there is controversy in the literature regarding whether LT patients undergoing THA/TKA have higher mortality than the general ***,future research should attempt to resolve this controversy.

关键词： Liver transplant Total knee arthroplasty Total hip arthroplasty Results Mortality

Diet switch and omega-3 hydroxy-fatty acids display differential hepatoprotective effects in an obesity/nonalcoholic fatty liver disease model in mice

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 2018年第4期24卷 461-474页

作者： Roberto rodriguez-Echevarria Jose Macias-Barragan Marcela Parra-Vargas Judith Rebeca Davila.rodriguez Eduardo Amezcua-Galvez Juan Armendariz-Borunda Institute for Molecular Biology and Gene Therapy-CUCS Department of Molecular Biology and GenomicsUniversity of GuadalajaraGuadalajara 44340Mexico Department of Health Sciences-CUValles University of GuadalajaraGuadalajara 46600Mexico Hospital Civil de Guadalajara Guadalajara 46600Mexico

AIM To study the effect of 18-hydroxy-eicosapentaenoic acid(18-HEPE) and 17-hydroxy-docosahexaenoic acid(17-HDHA) in a murine model of obesity/nonalcoholic fatty liver *** C57 BL/6 mice were fed with standard chow diet(CD) or high-fat, fructose-enriched diet(HFD) for 16 wk. Then, three groups were treated for 14 d with either, diet switch(HFD for CD), 18-HEPE, or 17-HDHA. Weightand fasting glucose were recorded on a weekly basis. Insulin tolerance test was performed at the end of treatment. Histological analysis(HE and Masson's trichrome stain) and determination of serum insulin, glucagon, glucagon-like peptide 1(GLP-1), glucose-dependent insulinotropic polypeptide, adiponectin and resistin were carried out as well as liver proteins by western *** Mice treated with hydroxy-fatty acids 18-HEPE and 17-HDHA displayed no weight loss or improved insulin sensitivity. However, these mice groups showed a significant amelioration on serum GLP-1, adiponectin and resistin levels. Also, a significant reduction on inflammatory infiltrate was observed at both portal and lobular zones. Furthermore, up-regulation of PPARα/γ protein levels was observed in liver tissue and it was associated with decreased levels of NF-κB also determined by western blot analysis. On the other hand, diet switch regimen resulted in a marked improvement in most parameters including: weight loss, increased insulin sensitivity, decreased steatosis, restored levels of insulin, glucagon, leptin, adiponectin and resistin. However, no significant changes were observed regarding inflammatory infiltrate in this last *** 18-HEPE and 17-HDHA differentially exert hepatoprotective effects through up-regulation of nuclear receptors PPARα/γ and amelioration of serum adipokines profile.

关键词： Nonalcoholic fatty liver disease Polyunsaturated fatty acids 18-hydroxy-eicosapentaenoic acid 17-hydroxy-docosahexaenoic acid Obesity