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Partial and Spectral-Viscosity Models for Geophysical Flows

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Chinese Annals of Mathematics,Series B 2010年第5期31卷 579-606页

作者： Qingshan CHEN max GUNZBURGER Xiaoming WANG Department of Scientific computing Florida State University Tallahassee FL 32306 USA. Department of Mathematics. FloridaState University Tallahassee FL 32306 USA.

Two models based on the hydrostatic primitive equations are *** first model is the primitive equations with partial viscosity only,and is oriented towards large-scale wave structures in the ocean and *** second model is the viscous primitive equations with spectral eddy viscosity,and is oriented towards turbulent geophysical *** both models,the existence and uniqueness of global strong solutions are *** the second model,the convergence of the solutions to the solutions of the classical primitive equations as eddy viscosity parameters tend to zero is also established.

关键词： Primitive equations Partial viscosity Spectral-eddy viscosity

Effects of light emitting diode lights on plant growth,development and traits a meta-analysis

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Horticultural Plant Journal 2021年第6期7卷 552-564页

作者： Yuanchun Ma An Xu Zong-Ming(max)Cheng college of Horticulture Nanjing Agricultural UniversityNanjingJiangsu 210095China Department of Plant Sciences University of TennesseeKnoxvilleTN 37996United States

The various monochromatic Light Emitting Diode(LED)lights are widely used in growth facility for cultivating various plants,particularly horticultural crops because of their higher luminous efficiency,lower radiation and power consumption than the traditional white fluorescent lamp ***,considerable inconsistent effects have been reported in *** conducted a meta-analysis to assess the effects of different colors of LED light on plant growth,development and various *** to the light from white fluorescent lamps,the red LED light significantly changed 4 out 26 plant characteristics by at least 37%,and blue LED light significantly increased 5 of 26 assessed characteristics by 37%or *** combination of red/blue LED lights only significantly increased dry weight by 161%among 25 plant characteristics *** to the white LED light,red LED light significantly decreased 2 of 9 plant characteristics by at least 36%,and blue LED light significantly decreased only 1 of 9 plant characteristics,total chlorophyll content,by 42%.In the moderators analyzed,plant taxonomic families significantly influenced the effects of LED lights on shoot dry weight,and plant life cycles and plant taxonomic families significantly affected the effect on stomatal *** systematic meta-analysis,we found that the effect of LED on plant growth and quality traits was speciesspecific,and the effect was affected by the cultivation ***,we suggest that researchers be more targeted to experiment,and collect traits associated with practical production,especially related to the quality of product data,such as carotenoids,anthocyanin and other antioxidant *** article is to provide more data with practical application,guide the application of LED in horticultural plant factory.

关键词： LED Plant development Meta-analysis

Environmental-friendly binder for carbon-free ladle bricks,RH chrome-free bricks and carbon-containing bricks complexation magnesia alumina binder

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China's Refractories 2024年第2期 56-56页

作者： Tieling Zhaohui Energy Saving Technology Development co.,Ltd. Tieling Zhaohui Energy Saving Technology Development co. Ltd.

complexation magnesia alumina binder,a kind of environmental-friendly inorganic binder,is mainly used for the production of basic unfired refractories and some acid unfired *** binder can be divided into two groups:W3297BX and G3297BX.W3297BX specializes in magnesia-rich unfired products such as magnesia bricks,RH chrome-free bricks,magnesia chrome bricks,magnesia alumina bricks and magnesia carbon bricks.G3297BX specifically serves alumina-rich unfired products such as alumina magnesia bricks,alumina magnesia carbon bricks,alumina chrome bricks,carbon-free ladle bricks and various carbon-free *** binder is carbon-free,non-toxic and tasteless,and is suitable to prepare unfired bricks for ultra-low carbon steel smelting.

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Assessing fire severity in Turkey's forest ecosystems using spectral indices from satellite images

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林业研究:英文版 2023年第6期34卷 1747-1761页

作者： coşkun Okan Güney Ahmet Mert Serkan Gülsoy Department of Forest Fires Aegean Forestry Research Institute35430 IzmirTurkey Department of Wildlife Ecology and Management Faculty of ForestryIsparta University of Applied Science32260 IspartaTurkey Department of Soil Science and Ecology Faculty of ForestryIsparta University of Applied Science32260 IspartaTurkey

Fire severity classifications determine fire damage and regeneration potential in post-fire areas for effective implementation of restoration *** fire damage varies according to vegetation and fire characteristics,regional assessment of fire severity is *** objectives of this study were:(1)to test the performance of different satellite imagery and spectral indices,and two field—measured severity indices,CBI(composite Burn Index)and GeoCBI(Geometrically structured composite Burn Index)to assess fire severity;(2)to calculate classification thresholds for spectral indices that performed best in the study areas;and(3)to generate fire severity maps that could be used to determine the ecological impact of forest *** large fires in Pinus brutia(Turkish pine)and Pinus nigra *** ***(Anatolian black pine)—dominated forests during 2020 and 2021 were selected as study *** results show that GeoCBI provided more reliable estimates of field—measured fire severity than *** Sentinel-2 and Landsat-8/OLI images performed similarly well,MODIS performed *** severity classification thresholds were determined for Sentinel-2 based RdNBR,dNBR,dSAVI,dNDVI,and dNDMI and Landsat-8/OLI based dNBR,dNDVI,and *** several spectral indices,the highest accuracy for fire severity classification was found for Sentinel-2 based RdNBR(72.1%)and Landsat-8/OLI based dNBR(69.2%).The results can be used to assess and map fire severity in forest ecosystems similar to those in this study.

关键词： Remote sensing Forest fire Fire severity Spectral indices composite burn index

Temporal and spatial anti-aliasing for rendering reflections on water waves

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computational Visual Media 2021年第2期7卷 201-215页

作者： Namo Podee Nelson max Kei Iwasaki Yoshinori Dobashi Hokkaido University Sapporo060-0814Japan University of California Davis95616USA Wakayama University Wakayama640-8441Japan

The reflection of a bright light source on a dynamic surface such as water with waves can be difficult to render well in real time due to reflection aliasing and *** this paper,we propose a solution to this problem by approximating the reflection direction distribution for the water surface as an elliptical Gaussian *** we analytically integrate the reflection contribution throughout the rendering interval *** method can render in real time an animation of the time integrated reflection of a spherical light source on highly dynamic waves with reduced aliasing and flickering.

关键词： real-time rendering anti-aliasing reflection water surface water waves elliptical Gaussian

Evaluation of antioxidant activities of some Nigerian medicinal plants

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Asian Pacific Journal of Tropical Medicine 2009年第4期2卷 27-32页

作者： Uche FI Ezugwu co Department of Pharmacognosy and Ethnotherapy University of Port Harcourt Nigeria Department of Pharmacognosy University of Nigeria Nsukka Nigeria

Objective:The methanol extracts of the leaves of Kolancheo(K.) pinnata,Aspilia(A.) africana,Mucuna (M.) pruriens,Emilia(E.) coccinea,Triumfetta(T.) rhomboidea,Laportea(L.) ovalifolis,Celosia(C.) trigynea,Cucurbita(C.)moschata and Asystesia(A.)gangestica were evaluated for antioxidant activities,the reducing potentials of these plants were also determined and phytochemical screening of some of these plants were carried ***:The antioxidant activities of these plants were evaluated by the use of 2,2-diphenyl -1 -picrylhydrazyl(DPPH) free radical assay and *** reducing potentials of these plants were determined using Ferric chloride,Potassium Ferricyanide and Trichloroacetic acid proceedures. The phytochemical screenings of the medicinal plants were equally done using standard ***: The percentage of antioxidant activities values for the plants were:(31.00±1.80)%,(58.40±1.26) %,(59.10±1.60)%,(60.00±1.05)%,(60.80±1.28)%,(62.40±1.26)%,(64.80±2. 10)%,(75.70±2.60)%and(82.70±2.80)%for ***,***,***,L. ovalifolia,***,***,***,*** and *** values were dose-dependent and statistically significant at P comparable to the standard used,Tocopherol which was found to be(97.20±1.06)%.The reducing potentials of the plants were found to be positively correlated to the antioxidant activities of the *** screenings revealed the presence of alkaloids,flavonoids,terpenoids,saponins and tannins in the medicinal ***:The findings from this study have revealed the potentials of these plants as *** could be exploited in drug development in search of powerful antioxidants which are urgently needed to challenge free radicals

关键词： Phytochemical screening Antioxidant activity Reducing potentials Nigerian medicinal plants

The Martin moving grate technology

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Waste Disposal and Sustainable Energy 2023年第3期5卷 283-293页

作者： Ralf Koralewska Ulrich Martin max Schönsteiner MARTIN GmbH für Umwelt-und Energietechnik Leopoldstrasse 24680807MunichGermany

The thermal treatment of waste using grate-based systems has gained global acceptance as the preferred method for sustainable management of residual *** is because the energy content of the waste is utilized and quality products and residues are *** Waste-to-Energy(WtE)plants are extremely *** knowledge of“fuel”waste and its effects on the design and operation of WtE plants is crucial for the successful planning and operation of these *** respond to new challenges and/or priorities,developing and implementing innovative technologies is *** long-term global partnerships and innovative grate and combustion technologies,Martin guarantees that in future,residual waste will be treated following ecological and economic constraints and in compliance with international legal requirements.

关键词： Waste-to-Energy combustion Grate technologies Heating value Developing countries

A data-driven approach to modeling high-density terminal areas：A scenario analysis of the new Beijing,China airspace

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Chinese Journal of Aeronautics 2017年第2期30卷 538-553页

作者： max Z.Li Megan S.Ryerson Department of Electrical and Systems Engineering University of Pennsylvania Philadelphia PA 19104 USA Department of City and Regional Planning University of Pennsylvania Philadelphia PA 19104 USA

Airports are being developed and expanded rapidly in China to accommodate and promote a growing aviation *** future Beijing Daxing International Airport（DAX） will serve as the central airport of the JingJinJi megaregion,knitting the Beijing,Tianjin,and Hebei regions *** will be a busy airport from its inception,relieving congestion and accommodating growth from Beijing Capital International Airport（PEK）,currently the second busiest airport in the world in passengers *** aim to model terminal airspace designs and possible conflicts in the future Beijing Multi-Airport System（MAS）.We investigate standard arrival procedures and mathematically model current and future arrival trajectories into PEK and DAX by collecting large quantities of publicly available track data from historical arrivals operating within the Beijing terminal *** find that（1） trajectory models constructed from real data capture aberrations and deviations from standard arrival procedures,validating the need to incorporate data on historical trajectories with standard procedures when evaluating the airspace and（2） given all existing constraints,DAX may be restricted to using north and east arrival flows,constraining the capacity required to handle the increases in air traffic demand to *** results indicate that the terminal airspace above Beijing,and the future JingJinJi region,requires careful consideration if the full capacity benefits of the two major airports are to be realized.

关键词： Air traffic management Beijing airspace Multi-airport system Trajectory modeling Terminal airspace

Economic and Environmental Performance of Biowaste-to-energy Technologies for Small-scale Electricity Generation

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Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 12-18页

作者： max J.A.Romero Rivas Davide Capuano Claudio Miranda Graded S.p.A. NapoliNA 80141Italy

Electricity is predicted to be the energy vector that will undergo major changes in the future,and a transition would be observed in the resources such as waste and residual biomass that we use to satisfy the energy ***,this study aims to highlight the main economic and environmental performances of different biowaste-to-energy technologies for small-scale electricity generation by comparing the direct combustion of refined vegetable oil obtained from waste cooking oils(thermal pathway),anaerobic digestion of biowaste(biochemical pathway),and gasification of wood residues(thermochemical pathway).The economic analysis is mainly based on personal experiences in the energy sector and shows an overview of the performance in investment of combined heat and power(CHP)systems,ranging from 100 to 500 kW for a period of 20 *** environmental assessment is conducted considering the life-cycle thinking approach using support from the openLCA software,product environmental footprint(PEF)database,and previous studies that have reported environmental inventory data from real industrial cases.

关键词： Biowaste-to-energy small-scale generation economic assessment environmental assessment