stability dynamic and aeroelastic optimization of functionally graded composite structures
NGHIÊN cứu ổn ĐỊNH của vỏ có cơ TÍNH BIẾN THIÊN CHỊU tác DỤNG của tải TRỌNG ĐỘNG STABILITY STUDY OF FUNCTIONALLY GRADED MATERIAL SHELLS SUBJECT TO DYNAMIC LOADS
... post-buckling and limit-cycle oscillation of functionally graded panel with structural damping in supersonic airflow, 2009, Composite Structures (91), pp 205-211 [2] Lee S.-L., Kim J.-H., Thermal Stability ... 205-211 [2] Lee S.-L., Kim J.-H., Thermal Stability Boundary of FG Panel under Aerodynamic Load, World Academy of Science, Engineering and Technology,2007, (32), pp 60 - 65 776 Kỷ yếu hội nghị khoa ... Nội, 2015 [4] Trần Ích Thịnh, Vật liệu composite học tính toán kết cấu, NXB Giáo dục, 1994 [5] Yuan K H., Qiu Z P., Nonlinear flutter analysis of stiffened composite panels in supersonic flow,...
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NGHIÊN cứu ổn ĐỊNH của tấm có cơ TÍNH BIẾN THIÊN CHỊU tác DỤNG của tải TRỌNG KHÍ ĐỘNG STABILITY STUDY OF FUNCTIONALLY GRADED MATERIAL PLATES SUBJECT TO AERODYNAMIC LOADS
... post-buckling and limit-cycle oscillation of functionally graded panel with structural damping in supersonic airflow, 2009, Composite Structures (91), pp 205-211 [2] Lee S.-L., Kim J.-H., Thermal Stability ... 205-211 [2] Lee S.-L., Kim J.-H., Thermal Stability Boundary of FG Panel under Aerodynamic Load, World Academy of Science, Engineering and Technology,2007, (32), pp 60 - 65 [3] Lê Khả Hòa, Phân ... effects on structures, 2nd ed, John Wiley & Sons, 1986 [5] Trần Ích Thịnh, Vật liệu composite Cơ học tính toán kết cấu, NXB Giáo dục, 1994 [6] Yuan K H., Qiu Z P., Nonlinear flutter analysis of stiffened...
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CFD for hydrodynamic efficiency and design optimization of key elements of SHP
... out of the best efficiency point (BEP) Figure Change of the runner speed and the frequency of vortex at the draft tube of a Francis turbine One of the most important concerns on turbine runner and ... longitudinal section of a ball valve Graph Ball valve opening angle of 45º - velocity (v/vo) (a) and pressure (p/po) profiles Graph shows the layout of the velocity and pressure profiles along stretches ... simulations as a tool for design and optimization of hydropower performance and flow behavior through hydromechanical devices or hydraulic structures of intake and outlet types Experimental tests...
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Cooling load and COP optimization of an irreversible Carnot refrigerator with spin-1/2 systems
... performance of quantum refrigerator using ideal quantum Bose and Fermi gases [36-38] Bartana and Kosloff [39] and Wu et al [40] studied the thermodynamic performance of laser cryocoolers Palao and Kosloff ... working medium of the refrigerator The frequency of the thermal phonons of the hot and cold reservoirs are ωh and ωc , respectively, and the creation and annihilation operators of ˆ+ ˆ− ˆ+ ˆ− ... engineering, and technology support for propulsion plants He has been the Director of the Department of Nuclear Energy Science and Engineering, the Director of the Department of Power Engineering and...
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Báo cáo lâm nghiệp: "Beech (Fagus sylvatica L.) – Technological properties, adhesion behaviour and colour stability with and without coatings of the red heartwood" ppsx
... system and the grade of heating and wetting of the glued samples Our findings support the research of Hapla and Fleischhut [20] who reported that the tensile strengths of the PVAC gluelines of red-hearted ... state and the coated state before and after 480 h of exposure Figure Colour difference of normal and red-hearted wood of the second sample series (newly developed coatings) in the uncoated state and ... heart and sapwood of a single log so that the occurrence of red heart is of little importance for processing and utilization 4.2 Colour behaviour The first indication of photodegradation of wood...
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Bóa cáo y học: "Prospective, randomized trial comparing fluids and dobutamine optimization of oxygen delivery in high-risk surgical patients [ISRCTN42445141]" pot
... suspicion of hypovolemia The heart rate, rhythm and MAP were carefully monitored and the dose of dobutamine was decreased or interrupted in the case of hypotension (MAP < 70 mmHg) and/ or in the ... integrity of the data and accuracy of the analysis Authors' contributions SML, FRL and CAP were responsible for the study design, data analysis and manuscript drafting FRL, DSP, AEY, PAA and EFS ... according to standard formulae The maximum PAOP was defined as the higher value of PAOP obtained during surgery and 24 hours postoperatively Management The patients were randomized with the use of sealed...
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Stability analysis and controller synthesis of switched systems
... least one boundary is of Type (b) and none of the boundaries is of Type (c) 3.4 Case 3.3: At least one boundary is of Type (c) and none of the boundaries is of Type (b) ... University of Singapore Finally, my special thanks go to my wife Yang Jing for her support, patience and understanding, and to my parents and grandparents for their love, support, and encouragement ... one boundary is of Type (c) and none of the boundaries is of Type (b) 4.4 80 Case 4.4: At least one boundary is of Type (b) and at least one boundary is of Type (c) ...
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Stability analysis and controller design of linear systems with random parametric uncertaintie
... investigate the influences of both the structure of the original system and the random uncertain parameters on the stability and performance of the system, and demonstrate the application of this finding ... σ-algebra of the subsets of Ω, and P is the probability measure Let ∆(ω) : (Ω, F) → (R, B) be an R-valued random variable, where ω is the random event, and B is the σ-algebra of the Borel subsets of ... Beta Distribution: Range of x1 with randomly generated samples of ∆ Beta Distribution: Range of x2 with randomly generated samples of ∆ Beta Distribution: Plot of the first to the fourth...
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Spectral stability study and molecular modeling of fluorence based conjugated polymers 5
... electronic levels of the polymer and the Fermi energies of stable metallic electrodes, and hence for a better balance of electron and hole injection rates, which is required for the achivement of high ... experimental band gap of MEH-PPV and MDCN-11 have been reported to be 2.10 and 1.92 eV, respectively11 M-DCN-11 is a copolymer of MEH-PPV and poly(2,5-dicyano-1,4-phenylene vinylene), its band gap ... that of either of the monocyano derivatives The overall stabilization of the HOMO and LUMO levels caused by the acceptor nature of the cyano substituents is also illustrated by the analysis of...
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Spectral stability study and molecular modeling of fluorence based conjugated polymers 4
... such as ease of processability and the ability to form large, flexible films Additionally, facile manipulation of substituents and backbones enables tuning of their (molecular) band gap These ... absorption and emission in chloroform/methanol mixtures The correlation between the backbone structural modifications for polyfluorene and the spectral stability and the electronic properties of the ... that of PDHF This is attributed to the decrement of electron density in the backbone of polymer induced by the electronwithdrawing effect of the substituted groups The advantage of the backbone of...
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Spectral stability study and molecular modeling of fluorence based conjugated polymers 3
... (PDHF) and the spiro-functionalized polyfluorene polymer (PDOFBSF) The improvement of thermal spectral stability of PDOFBSF compared to PDHF is thus attributed to the higher Tg of PDOFBSF Because of ... investigation of spectral stability for a series of fluorene-based blue LEPs with different backbone and side-chain structures aiming to understand the factors affecting emission spectral quality and excimer ... described in previous publication.36 The structures and purity of the polymers were confirmed by lH and 13C NMR and elemental analysis For film preparation, PDHF and PDOFBSF both were 44 dissolved in...
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Spectral stability study and molecular modeling of fluorence based conjugated polymers 2
... the aim of overcoming some common defects in MNDO (Modified Neglect of Diatomic Overlap), such as overestimation of energies for sterically crowded molecules and inadequate description of hydrogen ... the heat flow of a sample with increasing temperature, and is a determinant of exo/endothermic transitions such as glass transition temperature (Tg), crystallization temperature and melting point ... some of these integrals The numerical parameters are usually obtained through fitting calculated properties to known experimental data, such as heats of formation and ionization potentials, of...
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Spectral stability study and molecular modeling of fluorence based conjugated polymers 1
... potential (IP) and electron affinity (EA) of PPV, the work functions of ITO and Al (φITO and φAl), and the barriers to injection of electrons and holes (∆Ee and ∆Eh) [Handbook of Conducting Polymers, ... Band gap Band gap of the conjugated polymers can be tuned by modifying the polymers’ structures to obtain emission colors of the polymers in the visible and near infrared regions of spectra Band ... periods of time In general, the stability of a conducting polymer depends on a number of factors including its susceptibility and accessibility to external chemical species, the nature and type of...
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VIBRATION OF FUNCTIONALLY GRADED SANDWICH BEAMS EXCITED BY a MOVING h ARMONIC POINT LOAD DAO ĐỘNG của dầm SANDWICH có cơ TÍNH BIẾN THIÊN CHỊU KÍCH ĐỘNG của lực điều hòa DI ĐỘNG
... vibration and buckling of functionally graded sandwich beams, Composite Structures, 2015, Vol 119, p 1-12 [5] Şimşek, M., & Kocatürk, T., Free and forced vibration of a functionally graded beam ... S.C., Dash R.R., & Rout, T., Static and dynamic stability analysis of a functionally graded Timoshenko beam International Journal of Structural Stability and Dynamics, 2012, Vol 12(4), DOI: 10.1142/S0219455412500253 ... parameter and the moving speed of FG sandwich beam with various values of index n and h c /h ratio In order to examine the effect of the material distribution and the core thickness on the dynamic...
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báo cáo khoa học: " Radiological and pathological findings of a metastatic composite paraganglioma with neuroblastoma in a man: a case report" pptx
... Zurich, Switzerland Authors’ contributions TF and SK analyzed the clinical and radiological data FRF and PKB analyzed and interpreted the pathological data TF and FRF wrote the main parts of the manuscript ... necrosis, and the presence of vascular invasion and/ or extensive local invasion Figure (A) A macroscopic image of the composite paraganglioma The well delineated cranial part (right side) of the ... tumors include age and stage Page of at diagnosis, histologic subtype, mitotic-karyorrhexis index, and a variety of other cytogenetic and molecular genetic features [10] The treatment of these patients...
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Study on failure of surface and interface of the laminated composite structures of a small ship
... Doctor of Philosophy Study on the failure of surface and interface of the laminated composite structures of a small ship The Graduate School of the University of Ulsan Department of Mechanical ... conclusions and proposes future works Chapter Analysis of typical surface structures and design of test specimens 2.1 Joining structures 2.1.1 Analysis of structures The body of composite boat ... temperature and thickness Evaluation of fracture load and shear stresses of lap-joint specimens from the results of tensile and in-plane test and from bonding theory Evaluation and comparison of cavitation...
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Experimental investigation for powder reinforcement effect on mechanical properties and natural frequency of isotropic hyper composite plate with various boundary conditions
... powder, and particle reinforcement of composite materials types with difference volume fraction of fiber They study of effect of fiber and resin types and the effect of volume fraction of fiber and ... mechanical properties of the composite material (elastic properties: modulus of elasticity E, modulus of rigidity G, and Poisson’s ratio υ), [2] The analysis of natural frequency of composite plate/shell ... includes the determination of the modulus of elasticity for composite materials of short, and powder reinforcement fiber and polyester resin in various volume fractions of fiber and resin materials...
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Sound and vibration analysis of compliant piezoelectric enabled structures
... design and analysis of CLD Frequency and loss factors of sandwich beams were calculated by Mead & Markus (1969) and Rao (1978) for various boundary conditions using energy methods Yan and Dowell ... the effects of the thickness of coating layer and base plate, the mutual position of layers, and the damping loss factors on the sound transmission and reflection Chapter Introduction and literature ... plate-like structures The chapter starts with the investigation of wave propagation in the structures (a single piezoelectric and elastic layer) and the establishment of their solutions in expanded...
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Blast resistance of steel concrete composite structures
... response of column at stand-off distance of 15m (dynamic regime)88 Table 3-13 Blast response of column at stand-off distance of 10m 99 Table 3-14 Blast response of column at stand-off distance of ... Table 3-10 Blast response of column at stand-off distance of 10 m (impulsive regime) 88 Table 3-11 Blast response of column at stand-off distance of 12.5m (dynamic regime) ... differences in response of six configurations of sandwich composite panels, which differed in the thickness of steel plates, the concrete properties of the sandwich core and the connectors, were...
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Hamilton–Jacobi–Bellman equations and dynamic programming for power-optimization of radiative law multistage heat engine system
... Director of the Department of Nuclear Energy Science and Engineering, the Director of the Department of Power Engineering and the Superintendent of the Postgraduate School Now, he is the Dean of the ... The pressure p of the photon flux is a function of the temperature T1 , which is given by p = 4σ BT14 / (3c ) according to the thermodynamics of radiation When effects of change of pressure p ... thermodynamics of finite-size devices and finite-time processes J Appl Phys., 1996, 79(3): 1191-1218 [3] Berry R S, Kazakov V A, Sieniutycz S, Szwast Z, Tsirlin A M Thermodynamic Optimization of...
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