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Online since: January 2019
Authors: Mustafa Erkan Karaguler, Nazanin Moazzen, Touraj Ashrafian
The energy consumption, which is used during the life cycle of a building, is a huge amount affected by the energy demand for material and building construction, HVAC and lighting systems, maintenance, equipment, and demolition.
These typical projects are constructed in most of the regions with a same geometry and properties [12].
There is not any mechanical ventilation in the real projects, so the ventilation is assumed to be done through windows of classrooms during the break times.
The primary energy conversion factors for the fuel types consumed in Turkey are given as 1.00 for natural gas and 2.36 for electricity [16].
Moreover, for calculation CO2 emission during use stage, the emission factors for natural gas and electricity were taken as 0.234 and 0.626 kg.eq.CO2.kWh-1, respectively [19].
These typical projects are constructed in most of the regions with a same geometry and properties [12].
There is not any mechanical ventilation in the real projects, so the ventilation is assumed to be done through windows of classrooms during the break times.
The primary energy conversion factors for the fuel types consumed in Turkey are given as 1.00 for natural gas and 2.36 for electricity [16].
Moreover, for calculation CO2 emission during use stage, the emission factors for natural gas and electricity were taken as 0.234 and 0.626 kg.eq.CO2.kWh-1, respectively [19].
Online since: October 2015
Authors: Da Xu Zhao, Xian Cai, Guo Zhong Shou, Yu Qi Gu, Pei Xin Wang
The main disadvantage of 3D printing is that the mechanical movement speed of nozzle is limited, so the processing efficiency is not so high, and the applicable scope is restricted.
Granular protuberances on the wire surface will affect its material quality uniformity, resulting in wire feeding difficulties, and blocking.
Viscosity directly affects the peel strength between molding layers, thus affects the quality of molding.
However, the adhesiveness, fluidity and gravity of material, as the secondary factor, have little effect on the extrusion quality under the action of enough extruding force outside.
Impact Response of Bamboo-Plastic Composites with the Properties of Bamboo and Polyvinylchloride (PVC)[J].
Granular protuberances on the wire surface will affect its material quality uniformity, resulting in wire feeding difficulties, and blocking.
Viscosity directly affects the peel strength between molding layers, thus affects the quality of molding.
However, the adhesiveness, fluidity and gravity of material, as the secondary factor, have little effect on the extrusion quality under the action of enough extruding force outside.
Impact Response of Bamboo-Plastic Composites with the Properties of Bamboo and Polyvinylchloride (PVC)[J].
Online since: March 2008
Authors: C.B. Ene, Guido Schmitz, C. Nowak
A quantitative
analysis demonstrates that the observed effect may be understood by coupling of elastic stress and
vacancy currents, which in turn affects the transport of the atomic species.
To demonstrate effects that may change the diffusion coefficient only by a factor 2 to 3, very accurate measurements are required, which rely on a direct comparison between two arrangements.
Based on a vacancy mechanism and neglecting complicating aspects like thermodynamic factors or electron wind, we may formulate for the transport currents of both atomic species x c D x c Dj x c D x c Dj V V B B B B B V V A A A A A d d d d d d d d ν ν ν ν +−= +−= , (10) which leads in analogy to the Darken equations to the interdiffusion current of B atoms Fig. 6: Hydrostatic stress and strain aspect versus interfacial curvature (a) (calculated for a reaction layer thickness of 5 nm) and (b) versus thickness of reaction product (calculated for a curvature of 1/35 nm).
The direction of the stress difference is indeed compatible to the direction of the observed asymmetry and the expected kinetic properties of the forming intermetallic.
This way, the stress becomes limited to an almost constant value that is controlled by yield strength or creeping properties of the sample materials.
To demonstrate effects that may change the diffusion coefficient only by a factor 2 to 3, very accurate measurements are required, which rely on a direct comparison between two arrangements.
Based on a vacancy mechanism and neglecting complicating aspects like thermodynamic factors or electron wind, we may formulate for the transport currents of both atomic species x c D x c Dj x c D x c Dj V V B B B B B V V A A A A A d d d d d d d d ν ν ν ν +−= +−= , (10) which leads in analogy to the Darken equations to the interdiffusion current of B atoms Fig. 6: Hydrostatic stress and strain aspect versus interfacial curvature (a) (calculated for a reaction layer thickness of 5 nm) and (b) versus thickness of reaction product (calculated for a curvature of 1/35 nm).
The direction of the stress difference is indeed compatible to the direction of the observed asymmetry and the expected kinetic properties of the forming intermetallic.
This way, the stress becomes limited to an almost constant value that is controlled by yield strength or creeping properties of the sample materials.
Online since: December 2013
Authors: Hua Li, Li Li Feng, Bi Hao Lan, Lu Zhang, Hui Ying Chen, Ling Yu Tan, Xiao Ye Hong
In particular, silica microspheres as important technical materials, have received considerable attention due to its special properties and potential applications in many fields.
There are various types of manipulators are available, we can cite: laser tweezers and mechanical grippers [15] etc.
Theory Subjected to a non-uniform electric field, a neutral but polarizable particle experiences a time-averaged DEP force FDEP, the FDEP in an AC field is given by FDEP=2πR3εmRe[K(ω)]▽E2 (1) where R is the radius of the particle, εm the permittivity of the suspending medium, ω the field frequency, E the root mean square (RMS) value of the electric field and Re[K(ω)] is the real part of the Claussius–Mossotti factor which describes the relationship between the complex permittivities of the particle and the medium [22].
Besides polarizability, the applied frequency also affects the direction of DEP [23].
Miyake, Preparation and CO2 adsorption properties of aminopropyl-functionalized mesoporous silica microspheres, Journal of Colloid and Interface Science, 339 (2009) 382-389
There are various types of manipulators are available, we can cite: laser tweezers and mechanical grippers [15] etc.
Theory Subjected to a non-uniform electric field, a neutral but polarizable particle experiences a time-averaged DEP force FDEP, the FDEP in an AC field is given by FDEP=2πR3εmRe[K(ω)]▽E2 (1) where R is the radius of the particle, εm the permittivity of the suspending medium, ω the field frequency, E the root mean square (RMS) value of the electric field and Re[K(ω)] is the real part of the Claussius–Mossotti factor which describes the relationship between the complex permittivities of the particle and the medium [22].
Besides polarizability, the applied frequency also affects the direction of DEP [23].
Miyake, Preparation and CO2 adsorption properties of aminopropyl-functionalized mesoporous silica microspheres, Journal of Colloid and Interface Science, 339 (2009) 382-389
Online since: January 2012
Authors: Xian Da He, Hong Qi Ye, You Feng Li, Hui Liu
The small size of these particles endows them with unusual structural, electronic, optical, magnetic and chemical properties, leading to many important applications such as catalyst, electro-optical devices and precursor phases to advanced ceramics [1-3].
The distribution of supersaturation in a reaction system is the other important factor in the dependence of particle size distribution on it [5].
In addition, the development of novel materials requires smaller sized particles and additive powders with good dispersing properties in water in order to form a stable suspension [8].
Direct precipitation (DP) procedure: 200 ml 0.25M BaCl2 was added to 200 ml 0.25 M Na2SO4 solution without any dispersant at strong mechanical agitation in a stirred tank reactor.
The uncomplexed EDTA was also able to affect the morphology by directly adsorbing onto the barium sulfate surface [23].
The distribution of supersaturation in a reaction system is the other important factor in the dependence of particle size distribution on it [5].
In addition, the development of novel materials requires smaller sized particles and additive powders with good dispersing properties in water in order to form a stable suspension [8].
Direct precipitation (DP) procedure: 200 ml 0.25M BaCl2 was added to 200 ml 0.25 M Na2SO4 solution without any dispersant at strong mechanical agitation in a stirred tank reactor.
The uncomplexed EDTA was also able to affect the morphology by directly adsorbing onto the barium sulfate surface [23].
Online since: June 2008
Authors: Yi Min Zhang, Chang Qing Su
Zhang
b
School of Mechanical Engineering & Automation, Northeastern University, 110004, P.R.China
a
neusucq@163.com, bymzhangneu@sohu.com
Keywords: reliability analysis; random responses; sensitivity analysis; cracked rotor system;
rubbing
Abstract.
Sensitivity analysis can help the designer to know which problem in rotor system with rubbing is being solved and how the solution may affect the design of rotor system for system correction and reanalysis.
The radial displacements of disk are denoted by x2, y2.So the governing equations can be written as − +=+ −−− +− −+ +=+ −+− +− −+ −=+ −−− +− −+ =+ −+− +− −+ gmtemPyctyytxxkFyyFkym temPxctyytxxkFxxFkxm gmfPyctyytxxk F yyFkym fPxctyytxxk F xxFkxm y x yr xr 2 2 2 22 12 12 12 22 2 2 22 12 12 12 22 1 011 21 21 21 11 011 21 21 21 11 2 2 2 12 2 2 2 12 2 2 2 2 1 2 2 2 2 1 )sin( ]cos)(sin))[(()()( )cos( ]sin)(cos))[(()()( ]cos)(sin)[( )( )()( ]sin)(cos)[( )( )()( ωω ψε ψ εα ωω ψε ψ εα δ ψε ψ εα δ ψε ψ εα & && & && & && & && (1) Where, δ0 is the Sommerfeld correction factor, 2 2 0 2 = b b R L c R P RLµω δ ;µ is the lubricating oil viscosity; Pr is the half weight of rotor; L is the length of bearing; Rb is the radius of bearing;
Random Response Analysis If vector A(p×l) is a function of a matrix B(s×t), then the second order Taylor expansion of A about a nominal value B of B is given [ ] [ ] })({ )( )( )( )()( ][2 2 2 d 2 1 d B B A B B A BABA cs cs cs cs BBT BBT = = ∂ ∂ + ∂ ∂ += (6) Where, the probabilistic effects are described through the random parameter matrix B=(bij)s×t of order s×t, this can include the probabilistic distributions of all discredited random variable properties. cs(B) is the column string of matrix B. d[cs(B)][2]= d[cs(B)]⊗ d[cs(B)] is the second order Kronecker power of d[cs(B)].
Sensitivity analysis can help the designer to know which problem in rotor system with rubbing is being solved and how the solution may affect the design of rotor system for system correction and reanalysis.
The radial displacements of disk are denoted by x2, y2.So the governing equations can be written as − +=+ −−− +− −+ +=+ −+− +− −+ −=+ −−− +− −+ =+ −+− +− −+ gmtemPyctyytxxkFyyFkym temPxctyytxxkFxxFkxm gmfPyctyytxxk F yyFkym fPxctyytxxk F xxFkxm y x yr xr 2 2 2 22 12 12 12 22 2 2 22 12 12 12 22 1 011 21 21 21 11 011 21 21 21 11 2 2 2 12 2 2 2 12 2 2 2 2 1 2 2 2 2 1 )sin( ]cos)(sin))[(()()( )cos( ]sin)(cos))[(()()( ]cos)(sin)[( )( )()( ]sin)(cos)[( )( )()( ωω ψε ψ εα ωω ψε ψ εα δ ψε ψ εα δ ψε ψ εα & && & && & && & && (1) Where, δ0 is the Sommerfeld correction factor, 2 2 0 2 = b b R L c R P RLµω δ ;µ is the lubricating oil viscosity; Pr is the half weight of rotor; L is the length of bearing; Rb is the radius of bearing;
Random Response Analysis If vector A(p×l) is a function of a matrix B(s×t), then the second order Taylor expansion of A about a nominal value B of B is given [ ] [ ] })({ )( )( )( )()( ][2 2 2 d 2 1 d B B A B B A BABA cs cs cs cs BBT BBT = = ∂ ∂ + ∂ ∂ += (6) Where, the probabilistic effects are described through the random parameter matrix B=(bij)s×t of order s×t, this can include the probabilistic distributions of all discredited random variable properties. cs(B) is the column string of matrix B. d[cs(B)][2]= d[cs(B)]⊗ d[cs(B)] is the second order Kronecker power of d[cs(B)].
Online since: December 2012
Authors: V. Jeyalakshmi, R. Mahalakshmy, K.R. Krishnamurthy, B. Viswanathan
Besides the recombination, many other factors such as incident light intensity, fraction of the incident light absorbed by the photo catalyst, the type of the catalyst, its particle size, specific surface area, structural and photo-physical properties etc. are known to influence the kinetics of CO2 photo reduction.
3.2.
The critical factors are the choice of the pair for co-doping, level of doping and effective method of introducing dopants.
To what extent these factor affect the CO2 photo reduction is not clear.
Wavelength of the radiation is an additional factor that affects the product pattern.
Prato, “Excited-State properties of C60 Fullerene derivatives”, Acc.
The critical factors are the choice of the pair for co-doping, level of doping and effective method of introducing dopants.
To what extent these factor affect the CO2 photo reduction is not clear.
Wavelength of the radiation is an additional factor that affects the product pattern.
Prato, “Excited-State properties of C60 Fullerene derivatives”, Acc.
Online since: November 2021
Authors: Patrice Chetangny, Didier Chamagne, Vianou Antoine, Victor Zogbochi, Jacques Aredjodoun, Gerald Barbier, Sossou Houndedako
The choice of the Stirling engine to transform hot sources into mechanical energy lies in its many advantages.
(36) where kr is the skin effect factor, N the number of turns, lav the average length of a turn, Sc the cross-sectional area of the conductor and σ its specific conductivity Mechanical losses Mechanical losses are a consequence of bearing friction and windage.
Bearing losses depend on the shaft speed, bearing type, properties of the lubricant and the load on the bearing.
We evaluate the efficiency maps of the machines within the mechanical speed range produced by the medium Stirling engine (around 2000 rpm).
As a result, the choice of the electric generator and their renewable energies supply are taken randomly by researchers which will affect negatively the overall output of the generator set.
(36) where kr is the skin effect factor, N the number of turns, lav the average length of a turn, Sc the cross-sectional area of the conductor and σ its specific conductivity Mechanical losses Mechanical losses are a consequence of bearing friction and windage.
Bearing losses depend on the shaft speed, bearing type, properties of the lubricant and the load on the bearing.
We evaluate the efficiency maps of the machines within the mechanical speed range produced by the medium Stirling engine (around 2000 rpm).
As a result, the choice of the electric generator and their renewable energies supply are taken randomly by researchers which will affect negatively the overall output of the generator set.
Online since: August 2014
Authors: Petr Huňka, Stanislav Rehacek, David Citek, Hana Sachova, Jiří Kolisko
HVFAC is specially designed and final properties depend on combination of raw material, additives, admixtures and especially on quality of fly ash.
Basic material properties of fresh and hardened concrete are presented (slump test, air content, compressive strength etc.). 1.
Adsorption behaviour of proposed formula of superplasticificator can be purposefully affected by suitable combination of selected bases.
Measurements performed on all tested concrete formulations proved that the most significant factor influencing development of temperatures during hydration is the cement content.
While common concretes according to ČSN EN 206-1 contain substitution of cement with fly-ash on the level of about 10 % of weight, the our proposed concept of FAC allows obtaining of substitution higher than 30 % of weight with the same standard strength class of concrete, allowing comfortable de-moulding and equal or even better physical and mechanical parameters (long-term strengths, volume changes, development of hydration heat) and parameters of durability (resistance against carbonatation, water-tightness).
Basic material properties of fresh and hardened concrete are presented (slump test, air content, compressive strength etc.). 1.
Adsorption behaviour of proposed formula of superplasticificator can be purposefully affected by suitable combination of selected bases.
Measurements performed on all tested concrete formulations proved that the most significant factor influencing development of temperatures during hydration is the cement content.
While common concretes according to ČSN EN 206-1 contain substitution of cement with fly-ash on the level of about 10 % of weight, the our proposed concept of FAC allows obtaining of substitution higher than 30 % of weight with the same standard strength class of concrete, allowing comfortable de-moulding and equal or even better physical and mechanical parameters (long-term strengths, volume changes, development of hydration heat) and parameters of durability (resistance against carbonatation, water-tightness).
Online since: July 2012
Authors: Rong Ying Huang, Qiang Xu, Hong Guang Zheng
Material properties were derived from the data available in the literature.
Ligaments were modelled as non-linear hyperelastic fibered materials, and the mechanical properties were obtained from previous works [25, 26, 27].
The mechanical property of patellar tendon patellar tendon (PT) [12] was used for the grafts.
Stress-strain properties of ligament and grafts.
[24] C.S Proctor, M.B Schmidt, M.A Kelly, V.C Mow, Material properties of the normal medial bovine meniscus, J.
Ligaments were modelled as non-linear hyperelastic fibered materials, and the mechanical properties were obtained from previous works [25, 26, 27].
The mechanical property of patellar tendon patellar tendon (PT) [12] was used for the grafts.
Stress-strain properties of ligament and grafts.
[24] C.S Proctor, M.B Schmidt, M.A Kelly, V.C Mow, Material properties of the normal medial bovine meniscus, J.