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Online since: December 2014
Authors: Maria Teresa Amorim, Gibson Meira, Ruis Rei, Raphaele Malheiro, Aires Camões, Rui Miguel Ferreira
The chemical composition and physical properties of fly ash are presented in Table 2.
This reduction in carbonation depth can be related to the change experienced in the mortar properties that are considered important for the process of carbonation, such as oxygen permeability [13].
This ability to retain water can help to increase the moisture content inside the specimen and possibly hamper the development of carbonation process since, as is known [13, 15], the humidity control is one of the factors most important for the carbonation process.
Esmaeili, Effect of combined carbonation and chloride ion ingress by an accelerated test method on microscopic and mechanical properties of concrete, Construction and Building Materials, 58 (2014) 138-146
Cleland, Assessment of the durability of concrete from its permeation properties: a review, Construction and Building Materials, 15 (2001) 93-103
Online since: February 2015
Authors: Vladimir V. Popov, A.Yu. Pasynkov, I.I. Gorbachev
Introduction Carbide, nitride and carbonitride precipitates can considerably affect the structure and properties of steels.
The level and character of their effect are determined by the state of precipitate ensemble forming at ingot crystallization and its further thermal and thermo-mechanical treatment.
This is a serious drawback, as in some cases these two factors can appreciably affect the kinetics of precipitates evolution.
The Choice of Calculation Parameters According to the above-presented algorithm for the description of thermodynamic properties of a system, one must fit a thermodynamic description of the free energy of Fe-V-Nb-C-N system based on the CALPHAD-method, so that it would be possible to calculate partial Gibbs energies from formulas (9) – (12).
The initial PSD of “NbC” particles practically does not affect the evolution of “VN” precipitates, but on the contrary, the kinetics of “NbC” dissolution is affected, though not too much, by the initial PSD of “VN” precipitates.
Online since: June 2014
Authors: Ming Wei Shao, Ying Jeh Huang
Result and Discussion Comparison of physicochemical property. 1.
Although combustion efficiency and performance of internal combustion engine may be slightly affected, this situation can be ignored, and might be found in some advanced electronic combustion boilers.
In the future commercial use, improvement of safety of relevant storage devices and conveying equipment should be considered, and due to similar properties, no modification is made to any elements, and the periodic maintenance of internal combustion engine will not be adjusted.
The Key-Factor Modulation of Waste Tire Pyrolysis in Resource Chemical Plant for Recovered Fuel Production: Advanced Materials Research Vol. 852 (2014), p.768 [2] Wu, M.T.: A Study on Distribution Analysis and Reuse of Waste Tires, National Taipei University of Technology, Institute of Environmental Engineering and Management. (2011) [3] Tsai, H.H. : The Study of the Relationship between Exhaust Emission and Fuel Spray Combustion Characteristics of Tire Pyrolysis Oil in Diesel Engine (2012) [4] Kuo, C.H.: A Study on Combustion Characteristics of Tire Pyrolysis Oil in Diesel Engine, National Chung Cheng University, Institute of Mechanical Engineering. (2010) [5] Chang, Y.W.
A: Study on Gas Contamination from Combustion of Mixed Biomass Oil in Diesel Engine, National Chung Cheng University, Institute of Mechanical Engineering. (2009) [6] K.
Online since: April 2018
Authors: Sirithan Jiemsirilers, Pavadee Aungkavattana, Khanthima Hemra, Takaomi Kobayashi, Shuntaro Yamaguchi
It contains high calcium oxide and iron oxide resulting in a fast setting property.
It is likely to affect the strength resulting from the longer setting time, the lower strength at the early age.
XRD analysis showed the amorphous phase and the unreacted kaolinite and other crystalline phases that affected the compressive strength.
Barnett, Factor influencing the compressive strength of fly ash based geopolymer, Construction and Building Materials 110 (2016) 355-368
Kumar, Synthesis of fly ash-calcined clay geopolymers: Reactivity, mechanical strength and microstructure characteristics, Construction and Building Materials 125 (2016) 450-457
Online since: March 2011
Authors: Xiao Lun Liu, Wei Sun, Song Ding, Jian Fang Liu, Yu Ying Wang, Bin Jiang
A mechanical transmission was driven by the three chains (Figure 1).
Conclusion Through the test of noise comparision, noise mechanism of bush roller chains was studied, a method was proposed to reduce noise of bush roller chains, and low noise properties of duplex bush roller chains with split rollers were further verified and the following conclusions were made: 1.
All the factors that enhanced impact momentum had a positive effect on the noise. 2.
Mechanical Design, 1994, 11 (3): 22-24
ASME Journal of Mechanical Design, 1996, 118(4): 538-543.
Online since: December 2012
Authors: Guan Jun Bao, Peng Cheng Huang, Qing Hua Yang, Li Bin Zhang
When the joint damping coefficient is increasing, this value will also increase. 1 Introduction Different actions of mechanical hand (finger) are achieved by combining different movement of each driving joint.
The former is mechanical structure and driven by motor, while the latter combines flexible and pneumatic actuator.
Consequently, in recent 20 years, researchers gradually focus on the mechanical hand (finger) driven by this kind of actuator.
But its bending property is affected by parameters of rigid structure, property and parameters of FPA and some other factors.
Conf. on Micro Electro Mechanical Systems.
Online since: November 2021
Authors: Kristaps Palskis, Regīna Burve, Vera Serga, Marina Romanova, Yuri Dekhtyar
Thus, TSEE can be used to study electron traps in thin surface layers and external factors that affect the filling of these traps with electrons [3–6].
Thus, all films were always exposed to the same factors, except for gamma radiation in the case of the unirradiated films.
Maier, Basic properties of the F-type centers in halides, oxides and perovskites, Nucl.
Popov, Impact of gadolinium on the structure and magnetic properties of nanocrystalline powders of iron oxides produced by the extraction-pyrolytic method, Mater. 13 (2020) 4147-4157
Zimmermann, Comparative study of the luminescence properties of macro-and nanocrystalline MgO using synchrotron radiation, Nucl.
Online since: May 2011
Authors: Xiao Fei Wang, Kang Sheng Zhang, Jin Ping Liu, Zheng Huan Hu
Considering the little distinction in chemical compositions and strong similarity in mechanical property between these two materials, 21-4N can be replaced by 21-2N in the simulation.
(2) Horizontal stress and mean stress are relatively greatly affected by forming angle.
And the stage greatly affected by forming angle is stretching stage.
Maximum shear stress and maximum shear strain are not greatly affected by forming angle
Mechanical Research & Application Vol.(20)(2007) , p. 47–49, in Chinese
Online since: August 2004
Authors: Jung Hak Park, Man Yong Choi, Won Tae Kim
Box 102, Yusung, Daejon, 305-600, Korea 2 Department of Bio-Mechanical Engineering, Kongju National University, Chungnam, 340-702, Korea Keywords: Non-destructive Testing (NDT), Infrared (IR) Thermography, Thermal Imaging, Finite Volume Method (FVM), Heat Transfer Abstract.
According to the distance reaching the defects from the surface, the thermal imaging affected by temperature differences are compared, The simulations are also evaluated with the thermal pattern acquired by a qualitative IR thermography in a local district of the concrete deck Nomenclature i, j subscript, tensor, - g gravitation, m2/sec T temperature, ℃ u velocity, m/sec x coordinate, m symbol β therrmal expansion factor, 1/℃ ρ density, m3/kg ∆ difference, - Introduction Thermal imaging technology using the infrared thermography is one of prospective non-contact and non-destructive technologies.
Over the year, the importance of infrared imaging technology in NDT for mechanical and electrical facilities has been increasing popularity mainly because it makes remote inspection possible by sensing the thermal radiation emitted from the warm object.
Dimension and property of numerical modeling Table 2.
Table 2 shows properties of steel concrete sub-material and defect material of reinforced concrete.
Online since: June 2012
Authors: Hai Huang, Yong Jie Pang, Jiang Li, Shu Qiang Jiang
The main factors for the rejections were due to their inadequate anthropomorphic characters: 1) Heavy weight; 2) Few DOFs which could only realize simple grasp; 3) The appearance far from human hand; 4) Limited controllability: due to the lack of sensory feedback, the actuation system and the number of active/controllable degrees of freedom[9,10].
Using the virtual prototype, mechanical features of each component were iteratively modified and verified.
Using this control scheme we would be able to control the complete impedance property of a finger: (3) where , and are the desired target impedance parameters of the finger.
However, in reality, the finger dynamics is not known precisely, and the accuracy of the position and torque sensors are always affected by some noises.
Dynamic control can make the finger grasp with more smooth and precise trajectory and stable grasp force, in other words more like human grasp than mechanical grasp.
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