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ON THE UNIQUENESS OF THE WEAK SOLUTIONS OF A QUASILINEAR HYPERBOLIC SYSTEm WITH A SINGULAR SOURCE TERm

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Chinese Annals of mathematics,Series B 2002年第3期23卷 317-324页

作者： J.P.DIAS m.FIGUEIRA Dedicated to the memory of Jacques-Louis Lions Dedicated to the memory of Jacques-Louis Lions

This paper is a continuation of the authors' previous paper [1]. In this paper the authors prove, assuming additional conditions on the initial data, some results about the existence and uniqueness of the entropy weak... 详细信息

关键词： Cauchy problem Weak solution Quasilinear hyperbolic system

mathematical modeling of electrochemical storage for incorporation in methods to optimize the operational planning of an interconnected micro grid

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第9期11卷 737-750页

作者： Elaheh mASHHOUR S.m.mOGhaDDAS-TAFRESHI Department of Electrical Engineering K.N.Toosi University of Technology

We extract a mathematical model to simulate the steady-state charging and discharging behaviors of an electrochemical storage over a 24-hour time ***,we develop a model for optimizing the daily operational planning of an interconnected micro grid considering electrochemical *** optimization model is formulated to maximize the total benefit of the micro grid via selling power to its end consumers and also exchanging power with the wholesale energy market so that the constraints of distributed energy resources(DERs) and low-voltage grid are *** optimization problem is solved by a genetic algorithm,and applied on two micro grids operating under different scenarios containing the absence or presence of electrochemical *** of the results of the optimization model for this micro grid,with and without electrochemical storage,shows that the electrochemical storage can improve the economical efficiency of the interconnected micro grids by up to 10.16%.

关键词： Electrochemical storage micro grid Operational planning Distributed energy resources

Influence of Rice Genotypes on Folding and Spinning Behaviour of Leaffolder(Cnaphalocrocis medinalis) and Its Interaction with Leaf Damage

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Rice science 2013年第6期20卷 442-450页

作者： m.PUNIThaVALLI N.m.mUTHUKRISHNAN m.BALAJI RAJKUmAR Sugarcane Breeding Institute Agricultural College & Research Institute Central Institute of Subtropical Horticulture

Folding and spinning behavior of Cnaphalocrocis medinalis （Guenee）（Lepidoptera： Pyralidae） in different categories of rice genotypes viz., resistant, susceptible, hybrid, scented, popular and wild rice genotypes were significantly different. Longer leaf selection time and folding time per primary fold; shorter primary fold and whole leaf fold; lower number of binds per primary fold and whole leaf fold were recorded in resistant and wild rice genotypes. In the correlation analysis, it was found that the leaf folding parameters were positively correlated to leaf folder damage whereas the leaf spinning parameters were negatively correlated. Similarly, the morphological characters differed significantly among the chosen genotypes and were related to leaffolder damage. The leaf width and total productive tiller number were positively correlated to leaffolder infestation. Results also indicated that the trichome density and length, leaf length and plant height might contribute to resistance whereas total number of green leaves had no effect on leaffolder infestation. In the scatter plot analysis between leaf folding and spinning characters and leaffolder damage, the genotypes were separated into four groups viz., resistant （TKm6, Ptb 33, LFR831311, Oryza rhizomatis and O. minuta）, moderately resistant （ASD16 and CORH1）, moderately susceptible （ADT36, Pusa Basmati and CB200290） and susceptible （IR36 and TN1）. The present investigation proved that the leaf morphology viz., leaf length and width, plant height and trichome density and length may play a vital role in resistance against rice leaffolder.

关键词： rice genotype Cnaphalocrocis medinalis folding and spinning behaviour leaf morphology

Effects of Bentonite,Hydrogel and Biochar Amendments on Soil Hydraulic Properties from Saturation to Oven Dryness

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Pedosphere 2019年第5期29卷 598-607页

作者： Osama m0haWESH Wolfgang DURNER Department of Plant Production Faculty of AgricultureMutah UniversityKarak 61710 (Jordan) Division of Environmental Science and Technology Graduate School of AgricultureKyoto UniversityKyoto 6110011 (Japan) Institute of Geoecology Technical University of BraunschweigLanger Kamp 19cBraunschweig 38106 (Germany)

Effects of hydrogel, bentonite, and biochar as soil amendments on soil hydraulic properties and improving water availability from saturation to oven dryness were investigated. Soils were mixed with hydrogel (0.10%, 0.25%, and 0.50%), bentonite (0.5%, 1.0%, and 2.5%), and biochar (1.0%, 2.5%, and 5.0%) as soil amendments (weight:weight). Three methods (extended multistep outflow (XmSO), evaporation (EVA), and WP4 dewpoint potentiometer) were used to measure soil hydraulic properties from saturation to oven dryness. The cumulative XmSO results were more uniform across all the applied pressure steps for the amended soils. The EVA exhibited a shorter linear decrease during the first evaporation stage and a lower evaporation rate during the second evaporation stage. The WP4 results also exhibited that soil amendments increased the soil water content of the amended soils at low matric potentials. The results of soil water retention curves revealed that the unamended soil retained less water at any matric potential compared to the amended soils. Soil hydraulic conductivity decreased with increasing amount of soil amendments. The saturated hydraulic conductivity was higher for the unamended soil than the soils amended w计h 2.5% bentonite, 0.50% hydrogel, and 5.0% biochar by 11, 3, and 18 times, respectively. These results suggested that soil amendments improved soil water retentivity, which confirmed the appropriateness of these soil amendments for potential use in sandy soil improvements. However, field experiments and economical perception studies should be considered for further investigation.

关键词： evaporation extended multistep outflow soil amendment soil matric potential soil moisture soil water retentivity water availability WP4 dewpoint potentiometer

modeling DNA ＆ RNA mutation using mset and topology

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International Journal of Biomathematics 2018年第4期11卷 257-270页

作者： m. m. El-Sharkasy m. S. Badr Department of mathematics Faculty of Science Tanta University Tanta Egypt Department of mathematics Faculty of Science Assuit University New Valley Egypt

mathematical equations are now found not only in the books, but also they help in finding solutions for the biological problems by explaining the technicality of the current biological models and providing predictions that can be validated and complemented to experimental and clinical studies. In this research paper, we use the mset theory to study DNA ＆： RNA mutations to discover the mutation occurrence. Also, we use the link between the concept of the meet and topology to determine the compatibility or similarity between ＂types＂, which may be the strings of bits, vectors, DNA or RNA sequences, etc.

关键词： mutation DNA and RNA similarity mset topology.

EmDEN-FOWLER TYPE SYSTEm:NOETHER SYmmETRIES AND FIRST INTEGRALS

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Acta mathematica Scientia 2012年第5期32卷 1959-1966页

作者： B.muatjetjeja C.m.Khalique International Institute for Symmetry Analysis and mathematical modelling Department of Mathematical SciencesNorth-West UniversityMafikeng CampusPrivate Bag X 2046Mmabatho 2735Republic of South Africa

We classify a generalized coupled singular Emden-Fowler type system ＋a（t）vn=0,v＋b（t）um=0 with respect to the standard first-order Lagrangian according to the Noether point symmetries which it *** integrals of the various cases which admit Noether point symmetries are then *** system was discussed in the literature from the view-point of existence and uniqueness of positive solutions.

关键词： Lagrangian Noether symmetry first integrals Emden-Fowler type system Gauge function

modulation Instability of Low Frequency Whistler Waves

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Chinese Physics Letters 1997年第4期14卷 287-290页

作者： WANG De-yu m.Raadu N.Brenning Purple mountain Observatory Chinese Academy of SciencesNanjing 210008 Alfen Laboratory Royal Institute of TechnologyStockholmSweden

A self-focusing modulation instability of whistler wave has been investigated in the frequency region of ω_(ci)<ω<<ω_(ce).It is found that the ion term contribution should be taken into *** results show that the ne... 详细信息

A self-focusing modulation instability of whistler wave has been investigated in the frequency region of ω_(ci)hat the ion term contribution should be taken into *** results show that the necessary condition of instability depends on the pitch angle of perturbation wave.

关键词： wave. perturbation wave

Acoustic properties of sintered FeCrAly foams with open cells (Ⅰ): Static flow resistance

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Science China(Technological Sciences) 2008年第11期51卷 1803-1811页

作者： m. KEPETS A. P. DOWLING Cambridge University Engineering Department Cambirdge CB2 1PZ U.K.

Open celled metal foams fabricated through the route of metal sintering are a new class of material that offers novel mechanical and acoustic properties. The metal sintering approach offers a cost-effective means for the mass-production of open-cell foams from a range of materials, including high-temperature steel alloys. The mechanical properties of open-celled steel alloy (FeCrAly) foams have been characterized in previous studies, with focus placed on the influence of processing defects on stiffness and strength. In this work, the low-Reynolds number fluid properties of FeCrAly foams were investigated both theoretically and experimen- tally. Specifically, the static flow resistance of the sintered foams important for heat transfer, filtration and sound absorption was modeled based on a cylinder and a sphere arranged in a periodic lattice at general incidence to the flow. Experimental measurements were subsequently carried out to validate theoretical predictions, with good agreement achieved.

关键词： metal foam static flow resistance modeling experiment

Elite Opposition Based metaheuristic Framework for Load Balancing in LTE Network

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Computers, materials & Continua 2022年第6期71卷 5765-5781页

作者： m.R.Sivagar N.Prabakaran Department of Computer Science and Engineering Sathyabama Institute of Science&TechnologyChennai600119India Department of Electronics and Communication Engineering Koneru Lakshmaiah Education FoundationGuntur522502Andhra PradeshIndia

In present scenario of wireless communications,Long Term Evolution(LTE)based network technology is evolved and provides consistent data delivery with high speed andminimal delay through mobile *** traffic management and effective utilization of network resources are the key factors of LTE ***,there are some major issues in LTE that are to be considered are effective load scheduling and traffic *** LTE is a depraved technology,it is been suffering from these *** addressing that,this paper develops an Elite Opposition based Spider monkey Optimization Framework for Efficient Load Balancing(SmO-ELB).In this model,load computation of each mobile node is done with Bounding Theory based Load derivations and optimal cell selection for seamless communication is processed with Spider monkey Optimization *** simulation results show that the proposed model provides better results than exiting works in terms of efficiency,packet delivery ratio,Call Dropping Ratio(CDR)and Call Blocking Ratio(CBR).

关键词： Spider monkey optimization load balancing long term evolution optimal cell selection handover LTE networks QoS