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Aperiodic tidal data resource assessment and lCOE analysis of selected areas in Nigeria

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Clean Energy 2018年第1期2卷 45-57页

作者： l.m.Amoo Stevens Institute of Technology HobokenNew Jersey 07030USA

Renewable energy is plentiful;we need only develop the technology to harness and distribute it efficiently and *** conversion of energy to electricity continues to be an area of interest for engineers and *** energy has been classified as one of five energy innovations that could transform our world-the others being fuel cells,lithium-air batteries,the smart grid,and space-based solar power(http://***/Alternative-Energy/Renewable-Energy/***).Resource engineering assessment constitutes the first step to the effective utilization of any *** are various candidate sites for tidal stream energy in *** objective of this research is to examine the tidal stream resource potential of seven coastal sites using the modified continuous wavelet transform(CWT)method with a levelized cost of energy(lCOE)***’s method is newly applied to the aperiodic tidal series *** results indicate that meaningful power is viable and could be economically extracted at each respective site,with peak mean approximate velocities at each site of~10 m/s,and the lCOE estimate was found to be lower than that of the International Renewable Energy Agency(IRENA).This work represents the culmination of a series of papers exploring tidal energy resources in tropical Nigeria.

关键词： tidal energy renewable energy continuous wavelet transform(CWT) lCOE Nigeria

Resistance of stored bean varieties to Acanthoscelides obtectus （Coleoptera： Bruchidae）

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Insect Science 2008年第4期15卷 317-326页

作者： Edson l.l. Baldin Fernando m. lara Department of Plant Production-Faculty of Agronomic Sciences/Sao pa.lo State University Botucatu Sao Paulo State Department of Plant Protection Faculty of Agranan and Veterinary Sciences / Sao Paulo State University Zip Code 14884-900 Jaboticabal Sao Paulo State Brazil

During bean seed storage, yield can be lost due to infestations of Acanthoscelides obtectus Say, the bean weevil. The use of resistant varieties has shown promising results in fighting these insects, reducing infestation levels and eliminating chemical residues from the beans. The expression of resistance to A. obtectus in bean varieties is frequently attributed to the presence of phytohemagglutinins, protease inhibitors and alpha-amylase, and especially to variants of the protein arcelin, which reduce the larval viability of these insects. To evaluate the effect of bean seed storage time on the resistance expression of bean varieties to A. obtectus, tests with seeds of three ages （freshly-harvested, 4-month-old, and 8-monthold） were conducted in the laboratory, using four commercial varieties： Carioca Pitoco, Ipa 6, Porrillo 70, Onix; four improved varieties containing arcelin protein： Arc. 1, Arc.2, Arc. 3, Arc.4; and three wild varieties also containing arcelin protein： ***, Arc.3S, and Arc. 5S. The Arc.5S, ***, and Arc.2 varieties expressed high antibiosis levels against the weevil; Arc.1 and Arc3S expressed the same mechanism, but at lower levels. The occurrence of oviposition non-preference was also observed in Arc.5S and Arc. 1S. The Arc.3 and Arc. 4 varieties expressed low feeding non-preference levels against A. obtectus. The expression of resistance in arcelin-bearing, wild or improved varieties was affected during the storage of seeds, and was high under some parameters but low in others. The results showed that addition of chemical resistance factors such as protein arcelin via genetic breeding may be beneficial in improving the performance of bean crops.

关键词： antibiosis antixenosis bean weevil host plant resistance Phaseolus vulgaris

Bilirubin adsorption property of mesoporous silica and amine-grafted mesoporous silica

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Nano-micro letters 2009年第1期1卷 14-18页

作者： l.X.Zhang m.Zhu l.m.Guo l.li J.l.Shi State Key laboratory of High Performance and Superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Science

Nephritic, hepatic and immune failures would lead to the overload of endogenous toxic molecules(e.g. bilirubin, cholic acid, uric acid, creatinine etc.) in human bodies. It is fatal in most cases and extracorporeal blood purification(ECBP) is powerful first-aid therapy. Adsorbents are key parts of ECBP apparatus. mesoporous silicas should be promising candidates for these medical adsorbents, but there is no report about this. Herein, pure and amine-grafted mesoporous silicas have been applied to adsorb bilirubin, cholic acid, uric acid, creatinine and phenobarbital for the first time. These mesoporous materials show high adsorption capacities for bilirubin and uric acid in phosphate buffer solution(PBS). Effects of pore sizes, amine-modification, temperature and ionic strength on their bilirubin adsorption capacities have been studied in detail.

关键词： mesoporous silica Bilirubin adsorption Amine-grafted

Effect of periodic heat transfer on the transient thermal behavior of a convective-radiative fully wet porous moving trapezoidal fin

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Applied mathematics and mechanics(English Edition) 2023年第4期44卷 653-668页

作者： B.J.GIREESHA m.l.KEERTHI Department of PG Studies and Research in mathematics Kuvempu UniversityShankaraghatta 577451India

A moving trapezoidal profiled convective-radiative porous longitudinal fin wetted in a single-phase fluid is considered in the current *** periodic variation in the fin base temperature is taken into account along with the temperature sensitive thermal conductivity and convective heat transfer *** modeled problem,which is resolved into a non-linear partial differential equation(PDE),is made dimensionless and solved by employing the finite difference method(FDm).The results are displayed through graphs and *** effects of amplitude,frequency of oscillation,wet nature,Peclet number,and other relevant quantities on the distribution of temperature through the fin length and with the dimensionless time are *** is deciphered that the periodic heat transfer gives rise to the wavy nature of the fin thermal profile against *** analysis is beneficial in the design of fin structures for applications like solar collectors,space/airborne applications,and refrigeration industries.

关键词： convection fully wet porous fin trapezoidal profile moving fin unsteady periodic thermal condition

A vacuum nano-casting route to magnetite cores/mesoporous silica shell composites

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Nano-micro letters 2009年第1期1卷 27-29页

作者： l.m.Guo J.l.Shi State Key laboratory of High Performance and Superfine microstructure Shanghai Institute of Ceramics Chinese Academy of Science

Hollow mesoporous silica spheres with magnetite cores(HmSmC) have been fabricated by Vacuum Nano-casting Route. The amount of magnetite cores and saturation magnetization value can be easily adjusted by changing the concentration of iron nitrate solution used in the synthesis procedure. Furthermore, the as-prepared HmSmCs still maintain narrow mesopore distribution, high surface area and large pore volume after the hollow cores of hollow mesoporous silica spheres were filled with magnetite particles. Specially, when the saturation magnetization value of as-prepared HmSmCs reaches 22.0 emu/g, the surface area and pore volume of corresponding HmSmCs are 149 m^2/g and 0.19 cm^3/g, respectively, and the pore size is 2.30 nm. The corresponding samples are characterized by X-ray diffraction, N_2 sorption isotherms, transmission electron microscopy and vibrating-sample magnetometer.

关键词： Hollow mesoporous silica spheres magnetite cores Vacuum nano-casting

Stochastic averaging of quasi integrable and resonant Hamiltonian systems excited by fractional Gaussian noise with Hurst index 1/2

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Acta mechanica Solida Sinica 2017年第1期30卷 11-19页

作者： Q.F.lü m.l.Deng W.Q.Zhu Department of mechanics State Key Laboratory of Fluid Power and Mechatronic SystemsKey Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceZhejiang University

A stochastic averaging method of quasi integrable and resonant Hamiltonian systems under excitation of fractional Gaussian noise （fGn） with the Hurst index 1/2 〈 H 〈 1 is proposed. First, the definition and the basic property of fGn and related fractional Brownian motion （iBm） are briefly introduced. Then, the averaged fractional stochastic differential equations （SDEs） for the first integrals and combinations of angle variables of the associated Hamiltonian systems are derived. The stationary probability density and statistics of the original systems are then obtained approximately by simulating the averaged SDEs numerically. An example is worked out to illustrate the proposed stochastic averaging method. It is shown that the results obtained by using the proposed stochastic averaging method and those from digital simulation of original system agree well.

关键词： Quasi integrable and resonant Hamiltonian system Fractional Brownian motion Fractional Gaussian noise Stochastic averaging method Internal resonant

NONlINEAR HYPERBOlIC CAUCHY PROBlEmS IN GEVREY ClASSES

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Chinese Annals of mathematics,Series B 2001年第4期22卷 417-426页

作者： m.CICOGNANI l.ZANGHIRATI Dipartimentodimatematica UniversitadiBolognaPiazzadiPortaS.Donato540127BolognaItaly. Dipartimentodimatematica UniversithdiFerraraViaMachiavelli3544100FerraraItaly.

The authors prove well posedness in Gevrey classes of Cauchy problem for nonlinear hyper- bolic equations of constant multiplicity with Holder dependence on the time variable.

关键词： Gevrey classes Cauchy problem Nonlinear hyperbolic equations

Frictional contact problem for elastic-viscoplastic materials with thermal effect

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Applied mathematics and mechanics(English Edition) 2013年第6期34卷 761-776页

作者： m. SElmANI l. SElmANI Department of mathematics University of Setif

A dynamic contact problem for elastic-viscoplastic materials with thermal effects is investigated. The contact is bilateral, and the friction is modeled with Tresca＇s friction law with heat exchange. A variational formulation of the model is derived, and the existence of a unique weak solution is proved. The proofs are based on the classical result of nonlinear first order evolution inequalities, the equations with monotone operators, and the fixed point arguments. Finally, the continuous dependence of the solution on the friction yield limit is studied.

关键词： thermo-elasto-viscoplastic material dynamic process bilateral contact,Tresca's friction evolution inequality evolution equation weak solution fixed point

Assessing the reproductive health of men with occupational exposures

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Asian Journal of Andrology 2014年第1期16卷 23-30页

作者： Steven m Schrader Katherine l marlow Centers for Disease Control and Prevention National Institute for Occupational Safety and Health Division of Applied Research and Technology Cincinnati OH USA.

The earliest report linking environmental （occupational） exposure to adverse human male reproductive effects dates back to1775 when an English physician, Percival Pott, reported a high incidence of scrotal cancer in chimney sweeps. This observation led to safety regulations in the form of bathing requirements for these workers. The fact that male-mediated reproductive harm in humans may be a result of toxicant exposures did not become firmly established until relatively recently, when lancranjan studied lead-exposed workers in Romania in 1975, and later in 1977, when Whorton examined the effects of dibromochloropropane （DBCP） on male workers in California. Since these discoveries, several additional human reproductive toxicants have been identified through the convergence of laboratory and observational findings. many research gaps remain, as the pool of potential human exposures with undetermined effects on male reproduction is vast. This review provides an overview of methods used to study the effects of exposures on male reproduction and their reproductive health, with a primary emphasis on the implementation and interpretation of human studies. Emphasis will be on occupational exposures, although much of the information is also useful in assessing environmental studies, occupational exposures are usually much higher and better defined.

关键词： accessory glands endocrine epidemiology semen sexual function sperm testis toxicology