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Underground Space 2021年第4期6卷 379-395页

作者： Chuanqi lia Jian Zhou Danial Jahed Armaghani Xibing Li School of Resources and Safety Engineering Central South UniversityChangsha 410083China Department of Civil Engineering Faculty of EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia

Pillar stability is always evaluated using the safety factor(SF),which is defined as the ratio of pillar strength to pillar ***,most researchers have estimated pillar stress using the pillar shape ratio(w/h),uniaxial compressive strength(UCS)of the intact rock mass,and pillar depth(H).In this study,the geological strength index(GSI)of hard rock pillars was considered as a new variable for predictive *** index was developed by combining numerical simulation software(i.e.,FLAC3D)and a backpropagation neural network(BPNN).A hard rock pillar stability analysis,based on three methods including deterministic method,sensitivity analysis,and Monte Carlo simulation(MCS),was performed.A new formula was proposed to estimate the SF values based on the predicted stress,considering the GSI variable in the deterministic *** sensitivity analysis indicated that the variables impacting the SF from high to low are UCS,GSI,w/h,and *** this study,pillar stability was analyzed mainly using the GSI and MCS *** MCS results revealed that the GSI is also a major factor in pillar stability and has a greater effect on weak pillars than on strong ***,a pillar is more likely to be unstable when both the GSI and the UCS are *** study provides several references and procedures for improving the design of stable pillars considering the GSI as an important factor.

关键词： Hard rock pillar Numerical simulation Neural networks Safety factor Geological strength index Monte Carlo simulation

Eosinophilic esophagitis-endoscopic distinguishing findings

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World Journal of Gastroenterology 2012年第31期18卷 4221-4223页

作者： Ana Célia Caetano Raquel Goncalves Carla Rolanda Department of Gastroenterology Braga Hospital4710243 BragaPortugal Life and Health Sciences Research Institute School of Health SciencesUniversity of Minho4710057 BragaPortugal Life and Health Sciences Research Institute/3Bs-PT Government Associate Laboratory 4710057 BragaPortugal

Eosinophilic esophagitis(EE) is the most frequent condition found in a group of gastrointestinal disorders called eosinophilic gastrointestinal *** hypothetical pathophysiological mechanism is related to a hypersensitivity *** reflux disease-like complaints not ameliorated by acid blockade or occasional symptoms of dysphagia or food impaction are likely presentations of *** to its unclear pathogenesis and unspecific symptoms,it is difficult to diagnose EE without a strong *** histological criteria are necessary to diagnosis EE,there are some characteristic endoscopic *** present the case of a healthy 55-year-old woman with dysphagia and several episodes of esophageal food impaction over the last six *** case report stresses the most distinguishing endoscopic findings-mucosa rings,white exudative plaques and linear furrows-that can help in the prompt recognition of this condition.

关键词：嗜酸性粒细胞食管胃肠道疾病鉴别内镜胃肠功能紊乱过敏反应生理机制

Population viability analysis: using a modeling tool to assess the viability of tapir populations in fragmented landscapes

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Integrative Zoology 2012年第4期7卷 356-372页

作者： Emília Patrícia MEDICI Arnaud Leonard Jean DESBIEZ Lowland Tapir Conservation Initiative IPÊ-Institute for Ecological ResearchNazaréPaulistaSão PauloBrazil IUCN/SSC Tapir Specialist Group(TSG) GlandSwitzerland Escola Superior de Conservação Ambiental e Sustentabilidade(ESCAS/IPÊ) NazaréPaulistaSão PauloBrazil IUCN/SSC Conservation Breeding Specialist Group(CBSG) Brazil NetworkCampo GrandeMSBrazil Royal Zoological Society of Scotland EdinburghScotland

A population viability analysis(PVA)was conducted of the lowland tapir populations in the Atlantic Forest of the Pontal do Paranapanema region,Brazil,including Morro do Diabo State Park(MDSP)and surrounding forest *** from the model projected that the population of 126 tapirs in MDSP is likely to per-sist over the next 100 years;however,200 tapirs would be required to maintain a viable ***-ity analysis showed that sub-adult mortality and adult mortality have the strongest influence on the dynamics of lowland tapir *** road-kill has a major impact on the MDSP tapir population and can lead to population *** modeling showed that dispersal of tapirs from MDSP to the surrounding fragments can be detrimental to the overall metapopulation,as fragments act as ***,the model showed that under certain conditions the maintenance of the metapopulation dynamics might be determinant for the persistence of tapirs in the region,particularly in the smaller *** establishment of corridors con-necting MDSP to the forest fragments models resulted in an increase in the stochastic growth rate,making ta-pirs more resilient to threats and catastrophes,but only if rates of mortality were not increased when using *** PVA showed that the conservation of tapirs in the Pontal region depends on:the effective protection of MDSP;maintenance and,whenever possible,enhancement of the functional connectivity of the landscape,reducing mortality during dispersal and threats in the unprotected forest fragments;and neutralization of all threats affecting tapirs in the smaller forest fragments.

关键词： Atlantic Forest fragmentation lowland tapir minimum viable population population viability analysis

Mitotic inheritance of DNA methylation: more than just copy and paste

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Journal of Genetics and Genomics 2021年第1期48卷 1-13页

作者： Xuan Ming Bing Zhu Yingfeng lia National Laboratory of Biomacromolecules Institute of BiophysicsChinese Academy of SciencesBeijing 100101China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China

Decades of investigation on DNA methylation have led to deeper insights into its metabolic mechanisms and biological *** understanding was fueled by the recent development of genome editing tools and our improved capacity for analyzing the global DNA methylome in mammalian *** review focuses on the maintenance of DNA methylation patterns during mitotic cell *** discuss the latest discoveries of the mechanisms for the inheritance of DNA methylation as a stable epigenetic *** also highlight recent evidence showing the rapid turnover of DNA methylation as a dynamic gene regulatory mechanism.A body of work has shown that altered DNA methylomes are common features in aging and *** discuss the potential links between methylation maintenance mechanisms and diseaseassociated methylation changes.

关键词： DNMT1 Mitotic DNA methylation inheritance Neighboring reinforcement model Aging-associated methylation changes

Artificial intelligence in the endoscopic approach of biliary tract diseases:A current review

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Artificial Intelligence in Gastrointestinal Endoscopy 2022年第2期3卷 9-15页

作者： Fábio Pereira correia Luís Carvalho Lourenço Department of Gastroenterology Hospital Prof.Dr Fernando FonsecaAmadora 2720-276Portugal Gastroenterology Center Hospital Cuf Tejo-Nova Medical School/Faculdade de Ciências Médicas da Universidade Nova de LisboaLisbon 1350-352Portugal

In recent years there have been major developments in the field of artificial *** different areas of medicine have taken advantage of this tool to make various diagnostic and therapeutic methods more effective,safe,and *** this way,artificial intelligence has been an increasingly present reality in *** the field of Gastroenterology,the main application has been in the detection and characterization of colonic polyps,but an increasing number of studies have been published on the application of deep learning systems in other pathologies of the gastrointestinal *** of the application of artificial intelligence in the assessment of biliary tract is still *** studies support the usefulness of these systems in the investigation and treatment of choledocholithiasis,demonstrating that they have the potential to be integrated into clinical practice and endoscopic procedures,such as endoscopic retrograde *** application in cholangioscopy for the investigation of undetermined biliary strictures also seems to be *** the bile duct through endoscopic ultrasound can be challenging,especially for less experienced operators,thus becoming an area of potential interest for artificial *** this review,we summarize the state of the art of artificial intelligence in the endoscopic diagnosis and treatment of biliary diseases.

关键词： Deep learning Artificial Neural Networks Bile duct Choledocholithiasis Biliary strictures

OVERVIEW OF COMPLEX SYSTEMS IN SPORT

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Journal of Systems Science & Complexity 2013年第1期26卷 4-13页

作者： BALAGUE Natàlia TORRENTS Carlota HRISTOVSKI Robert DAVIDS Keith ARAUJO Duarte INEFC University of Barcelona INEFC University of Lleida Ss.Cyril and Methodius University SkopjeRepublic of Macedonia School of Human Movement Studies Queensland University of Technologies Faculty of Human Kinetics Technical University of Lisbon

The complex systems approach offers an opportunity to replace the extant pre-dominant mechanistic view on sport-related *** emphasis on the environment-system relationship,the applications of complexity principles,and the use of nonlinear dynamics mathematical tools propose a deep change in sport *** dynamics,ecological dynamics,and network approaches have been successfully applied to the study of different sport-related behaviors,from movement patterns that emerge at different scales constrained by specific sport contexts to game *** benefit from the use of such approaches in the understanding of technical,tactical,or physical conditioning aspects which change their meaning and dilute their *** creation of new learning and training strategies for teams and individual athletes is a main practical *** challenges for the future are investigating the influence of key control parameters in the nonlinear behavior of athlete-environment systems and the possible relatedness of the dynamics and constraints acting at different spatio-temporal scales in team *** sport-related phenomena can make useful contributions to a better understanding of complex systems and vice-versa.

关键词：体育运动复杂系统非线性行为概览非线性动力学环境系统生态动力学数学工具

Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder

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Journal of Energy Chemistry 2013年第5期22卷 790-794页

作者： Weizhai Bao Zhian Zhang Yongqing Gan Xiwen Wang Jie lia School of Metallurgy and Environment Central South University Engineering Research Center of High Performance Battery Materials and Devices Research Institute of Central South University in Shenzhen

Na-alginate as a binder in an aqueous solvent has been applied in the preparation of sulfur cathodes for lithium-sulfur *** electrochemical performances have been investigated by a charge-discharge cycle test and electrochemical impedance spectroscopy (EIS).The EIS tests indicated that the alginate sulfur cathode had lower resistance and better kinetic characteristics than those of the poly (vinylidene fluoride) (PVDF) sulfur cathode using PVDF as a binder in a N-methy-2-pyrrolidone (NMP) *** charge-discharge tests showed that the discharge capacity and the capacity retention rate of Na-alginate sulfur cathode were 508 mAh·g-1and 65.4% at the 50th cycle with a current density of 335 mA·*** with PVDF sulfur cathode,the alginate sulfur cathode showed a remarkably better cycle *** results show that the alginate binder has promising potential for lithium-sulfur battery applications.

关键词： lithium-sulfur battery binder Na-alginate electrochemical performance

Formation of graphene oxide from carbon rods of zinc-carbon battery wastes by audiosonic sonication assisted by commercial detergent

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Nanotechnology and Precision Engineering 2019年第2期2卷 89-94页

作者： Wipsar Sunu Brams Dwandaru lia Desi Parwati Rhyko Irawan Wisnuwijaya Physics Education Department Faculty of Mathematics and Natural Sciences Universitas Negeri Yogyakarta Karangmalang Complex

This study aims to determine the effect of audiosonic sonication in normal modes on the formation of graphene oxide(GO)fromcarbon rods of zinc-carbon(ZnC)battery *** method used in this study was sonication with an audiosonic frequency in normal modes,assisted by a surfactant solution derived from a commercial detergent.A graphite-detergent solutionwas exposed to audiosonicwaves using a frequency of 170 Hz for 3 hwith a pattern on the surface of the *** graphite solution was a mixture of 0.8 g of graphite powder and 100 ml of distilled water that was mixed using a blender for 2 min.25 ml of the solution was then taken and dripped with two drops of detergent solution containing 0.2 g detergent powder dissolved into 100 ml distilled water,so that a graphite-detergent solutionwas *** tools used in this study included UV–Visible spectroscopy(UV–Vis),Fourier TransformInfraRed spectroscopy(FTIR),and a Scanning Electron Microscope(SEM).The solution that was audiosonicated showed a strong visible nodal pattern on its *** UV–Vis spectroscopy produced absorbance peaks at wavelengths of 225 nmand 270 nm,and the FTIR indicated the presence of OH and C_C functional groups,which suggested the existence of *** SEMimages showed GO in the formof coral-like materials.

关键词： Audiosonic sonication Commercial detergent Graphene oxide ZnC battery

Automatic analysis of deep-water remotely operated vehicle footage for estimation of Norway lobster abundance

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Frontiers of Information Technology & Electronic Engineering 2018年第8期19卷 1042-1055页

作者： Ching Soon TAN Phooi Yee LAU Paulo L.correia Aida CAMPOS Centre for Computing and Intelligent Systems Universiti Tunku Abdul RahmanKampar 31900Malaysia lnstituto de Telecomunicaqoes Instituto Superior TecnicoAv.Rovisco Pais1Lisbon 1049-001Portugal Instituto Portugues do Mar e da Atmosfera(IPMA) Divisao de Modelacao e Gestao de Recursos da PescaLisbon 1749-077Portugal Centro de Ciencias do Mar(CCMAR)-Campus de Gambelas Faro 8005-139Portugal

Underwater imaging is being used increasingly by marine biologists as a means to assess the abundance of marine resources and their biodiversity. Previously, we developed the first automatic approach for estimating the abundance of Norway lobsters and counting their burrows in video sequences captured using a monochrome camera mounted on trawling gear. In this paper, an alternative framework is proposed and tested using deep-water video sequences acquired via a remotely operated vehicle. The proposed framework consists of four modules:(1) preprocessing,(2) object detection and classification,(3) object-tracking, and(4) quantification. Encouraging results were obtained from available test videos for the automatic video-based abundance estimation in comparison with manual counts by human experts(ground truth). For the available test set, the proposed system achieved 100%precision and recall for lobster counting, and around 83% precision and recall for burrow detection.

关键词： Object detection Object tracking Feature extraction Remotely operated vehicle(ROV)

Fluid dynamics performance of phase change material particles in a Wurster spout–fluid bed

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Particuology 2019年第1期17卷 163-175页

作者： Rui correia Bruna Barbon Paulob Ana Silvia Pratab Almerindo D. Ferreira ADAI-LAETA Department of Mechanical EngineeringUniversity of Coimbra3030-78& CoimbraPortugal Department of Food Engineering School of Food EngineeringStare University of Campinas80 Monteiro Lobato Street13083-862CampinasBrazil

Spout–fluid-bed coating of solid–lipid materials, including some Phase Change Materials (PCMs), is a rarely used approach because of the probability of a phase change during the process. However, if mastered, this process could enable the commercialization of high-load PCM particles to develop new materials. An understanding of the thermal and fluid dynamics profiles inside a reactor can be used to establish optimized coating conditions, to avoid premature PCM melting and to maximize the drying rate. This research studies, through computational simulation, the behavior of particles and the experimental thermal profile inside a Wurster spout–fluid bed. A simplified model approach of momentum was simulated using OpenFOAM and carnauba wax particles as a PCM material. The simulation showed that appropriate flow conditions inside the Wurster tube must vary between 200 and 300 m3/h to ensure a better particle coating. The measured experimental thermal profile was uniform in the reactor and it was 5–10 °C lower than the set temperature. Thus, a maximum airflow at 70 °C that was used in the equipment is considered suitable for the further coating of PCM particles. The methodology proved useful for the preliminary identification of flow and temperature conditions in the spout–fluid process.

关键词： Computational fluid dynamics OpenFOAM Simulation Carnauba wax