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Numerical Simulation of Bubble formation at a Single Orifice in Gas-fluidized Beds with Smoothed Particle Hydrodynamics and finite Volume Coupled Method

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Computer Modeling in Engineering & Sciences 2015年第1期104卷 41-68页

作者： f.Z.Chen H.f.Qiang W.R.Gao 601 Staff Room Xi’an Hi–Tech InstituteXi’anShanxiPRCPC 710025

A coupled method describing gas–solid two-phase flow has been proposed to numerically study the bubble formation at a single orifice in gas-fluidized *** particles are traced with smoothed particle hydrodynamics,whereas gas phase is discretized by finite volume *** force,gas pressure gradient,and volume fraction are used to couple the two *** effect of injection velocities,particle sizes,and particle densities on bubble growth is analyzed using the coupled *** simulation results,obtained for two-dimensional geometries,include the shape and diameter size of a bubble as a function of time;such results are compared with experimental data,previous numerical results,and other approximate model predictions reported in the ***,the flow profiles of gas and particle phases and the temperature distribution by the heat transfer model around the forming bubble are also *** results show that the coupled method efficiently describes of the bubble formation in fluidized *** proposed method is applicable for solving gas–solid two-phase flow in fluidization.

关键词： coupled method smoothed particle hydrodynamics finite volumemethod bubble formation heat transfer fluidization

Do vegetative and reproductive phenophases of deciduous tropical species respond similarly to rainfall pulses?

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Journal of forestry Research 2013年第4期24卷 643-651页

作者： A.P.Silveira f.S.Araújo f.R.Martins Itapipoca faculty of Education Av.Monsenhor Tabosa s/ no.Ceará State University -- UECE Graduate Course of Ecology and Natural Resources Department of BiologyBuilding 906Federal University of Ceará-UFC Department of Plant Biology Institute of BiologyP.O.Box 610University of Campinas – UNICAMP

Deciduous trees with high-density wood that occur in dry seasonal tropical regions respond to rainfall seasonality with synchrony in phenophases. However, they may exhibit interannual differences in synchrony and intensity of phenophases, as strategy for large variations in duration and intensity of rainfall pulses. Nevertheless, it remains unknown how phenophases of deciduous trees of the Brazilian semi-arid region respond to rainfall variations. The phenology of Cordia oncocalyx was monitored in deciduous thorny woodland （Caatinga）, from April 2009 to March 2011, and was correlated with rainfall, soil humidity, temperature, and photoperiod. The rainy years 2009 and 2011 exhibited higher duration of rainfall pulses and lower frequency of interpulses, but in 2010 pulse duration and total rainfall were lower. Circular statistics showed leaf flush followed by flowering and fruiting in the rainy season, and leaf fall and seed dispersal in the dry season.

关键词： asynchrony circular analysis deciduous phenology riskspreading seasonality.

The Materials Revolution

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Journal of Bionic Engineering 2006年第4期3卷 217-234页

作者： Julian f.V.Vincent Department of Mechanical Engineering The University of Bath Bath BA2 7AY UK

In the final essay of this series the gaps between biology and engineering are examined, and methods are suggested for crossing them. Creativity is seen as the essential, and TRIZ （the Russian Theory of Inventive Problem Solving） is recommended as the best set of methods both for stimulating creativity and for solving technical problems. When the catalogue of Inventive Principles of TRIZ is used to bring biology and technology to the same level of detail, the comparison shows that the similarity is only about 12%. The differences largely reside in the reliance of energy as a controlling parameter in conventional technology and the replacement of energy by information in biological systems. Although we might be moving slowly in this direction, a numerically based comparison such as this should provide more impetus.

关键词： The Materials Revolution

Approaching nuclei through multiple perspectives and diverse models： Patterns, symmetries, interactions

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frontiers of physics 2018年第6期13卷 29-38页

作者： R. f. Casten Wright Nuclear Structure Laboratory Yale University New Haven CT 06520 USA Michigan State University- fRIB East Lansing MI USA

Nuclei are complex objects yet display remarkable simplicities and regular patterns. The study of these and their origins has long been one of the twin pillars of nuclear structure research. We will discuss the behavior of atomic nuclei from this point of view. A key element will be the advantages of looking at the same data from different perspectives and of inter-relating these perspectives.

关键词： nuclear structure simple patterns and symmetries diverse perspectives and models emergence of collectivity residual interactions

fuzzy Logic Inference System for Managing Intensive Care Unit Resources Based on Knowledge Graph

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Computers, Materials & Continua 2023年第12期77卷 3801-3816页

作者： Ahmad f Subahi Areej Athama Department of Computer Science University College of Al JamoumUmm Al-Qura UniversityMakkah21421Saudi Arabia

With the rapid growth in the availability of digital health-related data,there is a great demand for the utilization of intelligent information systems within the healthcare *** systems can manage and manipulate this massive amount of health-related data and encourage different decision-making *** can also provide various sustainable health services such as medical error reduction,diagnosis acceleration,and clinical services quality *** intensive care unit(ICU)is one of the most important hospital ***,there are limited rooms and resources in most *** times of seasonal diseases and pandemics,ICUs face high admission *** line with this increasing number of admissions,determining health risk levels has become an essential and imperative *** creates a heightened demand for the implementation of an expert decision support system,enabling doctors to accurately and swiftly determine the risk level of ***,this study proposes a fuzzy logic inference system built on domain-specific knowledge graphs,as a proof-of-concept,for tackling this healthcare-related *** system employs a combination of two sets of fuzzy input parameters to classify health risk levels of new admissions to *** proposed system implemented utilizes MATLAB fuzzy Logic Toolbox via several experiments showing the validity of the proposed system.

关键词： fuzzy logic role-based expert system decision-support system knowledge graph Internet of Things ICU resource management Neo4J graph database

Born from a flood: The Salton Sea and Its Story of Survival

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Journal of Earth Science 2016年第1期27卷 89-97页

作者： Andrew f.B.Tompson Atmospheric Earth and Energy Division Lawrence Livermore National Laboratory Livermore

The Salton Sea is a terminal lake located in the deepest point of the topographically closed Salton Trough in southeastern California. It is currently the largest lake in area in the state. It was created by a flooding event along the Colorado River in 1905-1907, similar to the way historical floods over past centuries created ephemeral incarnations of ancient Lake Cahuilla in the same location. Its position at the center of today＇s Imperial Valley, a hot and arid locale home to some of the most productive irrigated agricultural lands in the United States, has ensured its ongoing survival through a delicate balance between agricultural runoff, its principal form of input, and vast evaporation losses. Nevertheless, its parallel role as a recreational resource and important wildlife habitat, established over its first century of existence, is threatened by increasing salinity decreasing water quality, and reduced water allocations from the Colorado River that feeds the valley＇s agriculture. The Salton Sea faces an increasingly uncertain future that will be influenced by reduced water imports from the Colorado River, demands for additional water sources to support farming and energy industries in the valley, and needs to stabilize the lake salinity, maintain recreational resources, and preserve what have become important ecosystems and wildlife habitats.

关键词： Salton Sea flood terminal lake water agriculture salinity wildlife habitat.

Prediction of Soil Depth from Digital Terrain Data by Integrating Statistical and Visual Approaches

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Pedosphere 2010年第3期20卷 361-367页

作者： f. M. ZIADAT International Center for Agricultural Research in the Dry Areas (ICARDA) P.O. Box 5466Aleppo (Syria)

Information about the spatial distribution of soil attributes is indispensable for many land resource management applications; however, the ability of soil maps to supply such information for modern modeling tools is questionable. The objectives of this study were to investigate the possibility of predicting soil depth using some terrain attributes derived from digital elevation models （DEMs） with geographic information systems （GIS） and to suggest an approach to predict other soil attributes. Soil depth was determined at 652 field observations over the A1-Muwaqqar Watershed （70 km2） in Jordan. Terrain attributes derived from 30-m resolution DEMs were utilized to predict soil depth. The results indicated that the use of multiple linear regression models within small watershed subdivisions enabled the prediction of soil depth with a difference of 50 cm for 77% of the field observations. The spatial distribution of the predicted soil depth was visually coincided and had good correlations with the spatial distribution of the classes amalgamating three terrain attributes, slope steepness, slope shape, and compound topographic index. These suggested that the modeling of soil-landscape relationships within small watershed subdivisions using the three terrain attributes was a promising approach to predict other soil attributes.

关键词： compound topographic index digital elevation model GIS watershed

Cognition and movement in neurodegenerative disorders:a dynamic duo

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Neural Regeneration Research 2024年第10期19卷 2101-2102页

作者： Marit f.L.Ruitenberg Department of Health Medical and NeuropsychologyLeiden UniversityLeidenthe Netherlands Leiden Institute for Brain and Cognition Leidenthe Netherlands

People with neurodegenerative disorders often experience problems across a variety of functional domains,including cognition,movement,and psychosocial *** classification of these disorders is based on the phenotypical manifestations that represent the most prominent clinical *** example,Parkinson's disease and Huntington's disease are typically regarded as movement disorders,whereas Alzheimer's disease(AD) and other dementias are regarded as cognitive disorders.

关键词： disorders Huntington degenerative

Earth's Solid Inner Core: Seismic Implications of freezing and Melting

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Journal of Earth Science 2013年第5期24卷 683-698页

作者： Vernon f Cormier Januka Attanayake Department of Physics University of Connecticut Center for Integrative Geoscience University of Connecticut Center for Integrative Geoscience University of Connecticut

Seismic P velocity structure is determined for the upper 500 km of the inner core and lowermost 200 km of the outer core from differential travel times and amplitude ratios. Results confirm the existence of a globally uniform f region of reduced P velocity gradient in the lowermost outer core, consistent with iron enrichment near the boundary of a solidifying inner core. P velocity of the inner core between the longitudes 45~E and 180~E （quasi-Eastern Hemisphere） is greater than or equal to that of an AK135-f reference model whereas that between 180~W and 45~E （quasi-Western Hemisphere） is less than that of the reference model Observation of this heterogeneity to a depth of 550 km below the inner core and the existence of transitions rather than sharp boundaries between quasi-hemispheres favor either no or very slow inner core super rotation or oscillations with respect to the mantle. Degree- one seismic heterogeneity may be best explained by active inner core freezing beneath the equatorial Indian Ocean dominating structure in the quasi-Eastern Hemisphere and inner core melting beneath equatorial Pacific dominating structure in the quasi-Western Hemisphere. Variations in waveforms also suRgest the existence of smaller-scale （1 to 100 km） heterogeneity.

关键词： Earth's inner core seismic structure geodynamo.