Parametric resonance of 4th order in a nonlinear vibrating system under the influence of frictions

... (a0 , ) + ftfo ~ - cos4^o ô a ~ s i n y v ' V ’| \ here a prime denotes partial differentiation with respect to o0 Parametric resonance o f 4th order in nonlinear vibrating system 437 The characteristic ... plitude o f stationary oscillations then becomes 5.3) D 2a% = H ị a ị ^ + í ì - ^ + ịiaì)2, /f2 = - y ^ - Parametric resonance o f 4th order in nonlinear vibrating system 440 T h e resonant curves ... T o study the stability o f stationary oscillations, the variational equations based on tlie Stationary solution will be considered By setting a = ơ0 + a, where a and ôy) we have are d = 4e...

Báo cáo lâm nghiệp: "Changing electrophoretic patterns of glutamate dehydrogenases and aspartate aminotransferases in a few tree species under the influence of ectomycorrhization" potx

... traces in the mycorrhiza, which exhibited a high level of NAD-GDH activity as did the non-mycorrhizal roots (Fig B) As for aspartate aminotransferase, the distinct isoforms found in mycorrhizas, ... Spruce-Hebeloma sp associa- tion, gel electrophoresis confirmed the presence of NAD-GDH in the host cells (one band) and the presence of a high level of NADP-GDH activity in the fungus (one major band and one ... confirmed these results: the vascular cylinder free of fungus and the cortical region including host cells and fungal hyphae revealed identical isoforms, while no activity was found in the peri- pheral...

On the phenomenon of parametric resonance of a nonlinear vibrator under the action of electromagnetic force

... the parametric oscillatiòn On the phenomenon o f parametric resonance o f a nonlinear vibrator 283 It is to be noted that the linear oscillation of the mass m in a similar electromechanical system ... electromechanical system, the scheme of which is represented in Fie The vibrator consists of a cantilever beam and a block of mass /?/, which is made of magnetic material The elastic force of the beam is assumed ... RESONANCE OF A N O N LIN EA R VIBRATO R U N D ER TH E ACTIO N OF E LEC T R O M A G N ET IC FO R C E N G l'V E N VA N DAO (H A N O I) This paper deals with the parametric resonance of a nonlinear...

PARAMETRIC RESONANCE OF ACOUSTIC AND OPTICAL PHONONS IN a COMPOSITIONAL SEMICONDUCTOR SUPERLATTICE

... CONCLUSION In this paper, we analytically investigate the possibility of parametric resonance of acoustic and optical phonons in CSSL We have obtained a general dispersion equation for parametric ampliﬁcation ... gases In order to continue the ideas of Refs and 3, the purpose of this paper is to also study the parametric resonance of acoustic and optical phonons, but in a Compositional Semiconductor superlattice ... PARAMETRIC RESONANCE OF ACOUSTIC AND OPTICAL PHONONS 249 In Ref and 4, we have studied the PIT in a quantum well and in a doper Compositional superlattice (DSSL) with non-degenerative...

PARAMETRIC TRANSFORMATION AND PARAMETRIC RESONANCE OF CONFINED ACOUSTIC PHONONS AND CONFINED OPTICAL PHONONS IN QUANTUM WELLS

... THE PARAMETRIC TRANSFORMATION OF CONFINED ACOUSTIC PHONONS AND CONFINED OPTICAL PHONONS IN QUANTUM WELLS Parametric transformation of confined acoustic phonons and confined optical phonons in quantum ... for confined acoustic and confined optical phonons in quantum wells, we use the general quantum distribution function [11] for the confined acoustic (confined → → optical) phonons, bm,− and cm,− ... possibility of parametric transformation and parametric resonance of confined acoustic phonons and confined optical phonons We obtained a general dispersion equation for parametric amplification and transformation...

Behavior of Zinc in a Constructed Wetland System Receiving Domestic Wastewater

... Agricultural Hydrology, Kyoritsu Shuppan Co., Ltd, Tokyo (in Japanese) Mays P A and Edwards G S (2001) Comparison of heavy metal accumulation in a natural wetland and constructed wetlands receiving acid ... Transfers and transformations of zinc in constructed wetlands: mitigation of a refinery effluent, Ecological Engineering, 14, 279-292 Isozaki Y., Nakajima F and Furumai H (2006) Speciation of zinc, ... phosphorus and zinc from domestic wastewater by a constructed wetland system in rural areas: a case study, Wat Sci Technol., 58, (12), 2427-2433 Brix H (1993) Wastewater treatment in constructed wetland: ...

Báo cáo khoa học: "METONYMY: REASSESSMENT, SURVEY OF ACCEPTABILITY, AND ITS TREATMENT IN A MACHINE TRANSLATION SYSTEM S" ppt

... Shin-ichiro and Wakao, Takahiro (1992) Metonymy: reassessment, survey of acceptability, and its treatment in a machine translation system Locating 1.1 Container for Content Dave drank the glasses The ... Metonymic interpretation and associative processes in natural language In Exxon has raised its price again Washington is insensitive to the needs of the people Language and Artificial Intelligence, Makoto ... that the main factors for treating metonymy correctly in a multilingual machine translation system are 1) its universality, which can be a guideline for the analysis component, 2) language dependency,...

– THE GRE QUANTITATIVE SECTION – The area of a sector is found in a similar way to ﬁnding the pptx

... To find the area of a circle, use the formula A = ␲r2 r ■ To find the area of a parallelogram, use the formula A = bh h b ■ To find the area of a rectangle, use the formula A = lw w l ■ To find the ... negative reciprocals Data Analysis Review Many questions on the GRE will test your ability to analyze data Analyzing data can be in the form of statistical analysis (as in using measures of central ... – THE GRE QUANTITATIVE SECTION – A NGLES OF A Q UADRILATERAL A quadrilateral is a four-sided polygon Since a quadrilateral can be divided by a diagonal into two triangles, the sum of its angles...

báo cáo hóa học: " A tool to measure the attributes of receiving IV therapy in a home versus hospital setting: the Multiple Sclerosis Relapse Management Scale (MSRMS)" pot

... more clinical and statistical cohesive set together rather than existing as separate scales For the same reasons, three domains (physical comfort, technical aspects of care, coordination of care) ... JC, AJT and JH were involved in guiding the study including the design and coordination All authors contributed to the interpretation of data and writing of the manuscript All authors read and approved ... different treatments This article reports the development of a rating scale measuring the essential aspects of patients’ experiences in MS relapse management, to be used in a trial of delivery of IV steroids...

báo cáo hóa học:" Research Article Existence of Weak Solutions for a Nonlinear Elliptic System" pot

... International Journal of Heat and Mass Transfer, vol 22, no 7, pp 1021–1032, 1979 H M Laun, M Rady, and O Hassager, “Analytical solutions for squeeze ﬂow with partial wall slip,” Journal of Non-Newtonian ... Variational Inequalities and Their Applications, vol 88 of Pure and Applied Mathematics, Academic Press, New York, NY, USA, 1980 15 J Heinonen, T Kilpel¨ inen, and O Martio, Nonlinear Potential ... “Nonisothermal, non-Newtonian Hele-Shaw ﬂows—II: asymptotics and existence of weak solutions, ” Nonlinear Analysis: Theory, Methods & Applications, vol 27, no 5, pp 539–559, 1996 12 G Aronsson and L C Evans,...

Báo cáo khoa học: "Soil CO in a beech forest: 2 efflux the contribution of root respiration Daniel" pptx

... year [19, 20 ] Soil Fine root was estimated by coring and dead roots in the trenched plots sorting remaining years after trenching The remaining fine root necromass was then compared to initial ... retrieved and processed as above This estimation of annual fine root production was corrected for the spatial and vertical variations of fine root biomass, assuming that fine root biomass in soil cores ... Li 6000-09 (LiCor Inc., USA) soil respiration chamber in which the increase of the CO concentration was recorded with the Li 625 0 infrared gas analyser (LiCor Inc., USA) as already described...

báo cáo khoa học: "The management of advanced oral cancer in a Jehovah''''s Witness using the Ultracision Harmonic Scalpel" docx

... Case report: The management of advanced oral cancer in a Jehovah’s Witness using the Ultracision Harmonic Scalpel Peter J Kullar1*, Kristian Sorenson2, Ruwan Weerakkody1 and James Adams1 Department ... a statim dose of gram tranexamic acid and anaestethseia was induced with a combination of propofol (120mg), fentanyl (100mcg) and vecuronium (8mg) Anaesthesia was maintained using a remifentanil ... surgery in JW have used aprotinin, a bovine derived inhibitor of trypsin and plasmin However, this was withdrawn in May 2008 due an increased risk of death in cardiac surgical patients[13] Therefore...

Báo cáo y học: "Validation of a microwave radar system for the monitoring of locomotor activity in mic pptx

... 12 mice housed individually in standard breeding cages Electronic system for the recording of locomotor activity The locomotor activity of the animal is recorded automatically by means of microwave ... parameters of locomotor activity Conclusion The aim of this study was to develop an apparatus consisting of a battery of radar sensors to allow the investigation of mouse activity rhythms In addition, ... recording of the observations Radar- based monitoring systems have proved effective in the study of behaviour, both in very small animals like insects [11] and in small mammals [12] Radar systems have...

Báo cáo y học: "Enrichment of intersubtype HIV-1 recombinants in a dual infection system using HIV-1 strain-specific siRNAs" pps

... Thus, parental viruses (e.g A and B) always dominate a dual infection and basically obscuring the characterization of replication-competent intersubtype HIV-1 recombinants, i.e present at very low ... the remaining 172 nt have nearly no recombination breakpoints These findings clearly indicate that pattern of breakpoints in intersubtype HIV-1 recombinants is shaped by both the reverse transcription ... is also apparent that intersubtype HIV-1 recombination, following a dual infection or superinfection of already infected individual, could lead to rapid immune escape A simple comparison of our...

Báo cáo y học: "Genetic and phylogenetic evolution of HIV-1 in a low subtype heterogeneity epidemic: the Italian example" pdf

... Figure strains Evolutionary relationships among non-recombinant HIV-1 Evolutionary relationships among non-recombinant HIV-1 strains The phylogenetic tree shows the subtypes of the M (main) HIV-1 ... scenario and drive the need of adapting the diagnostic and treatment strategies currently used in European Countries LB conceived of the study, analyzed data and drafted the manuscript; MT carried ... Scarabaggio T, Riva C, Di BC, Pierotti P, Saracino A, Lagioia A, Mazzotta F, Balotta C, Angarano G: HIV-1 subtypes and circulating recombinant forms (CRFs) from HIV-infected patients residing in...

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