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Online since: March 2020
Authors: Muthia Elma, Gesit Satriaji Saputro
Membrane is basically a thin layer between two fluid phases, its feed phase and the permeate phase which is a barrier to a particular species, which can separate substances of different sizes and limit the transport of various species based on physical and chemical properties.
The stability of membrane strength depends on the chemical, mechanical and thermal conditions of the membrane[3].
Inorganic membranes have recently caught the attention of the research and industry communities because of their long life span and better resistance to environmental factors and extrinsic industries.
Silica membranes have excellent molecular filtration properties and simple fabrication processes through sol-gel processing, although they need functionalization to overcome hydro-instability.
In addition to providing strength to the membrane pores, the addition of cobalt in silica sol will affect silanol and siloxane groups.
The stability of membrane strength depends on the chemical, mechanical and thermal conditions of the membrane[3].
Inorganic membranes have recently caught the attention of the research and industry communities because of their long life span and better resistance to environmental factors and extrinsic industries.
Silica membranes have excellent molecular filtration properties and simple fabrication processes through sol-gel processing, although they need functionalization to overcome hydro-instability.
In addition to providing strength to the membrane pores, the addition of cobalt in silica sol will affect silanol and siloxane groups.
Online since: August 2015
Authors: Piyalak Ngernchuklin, Arjin Boonruang, Jung Ho Ryu, Chalearmchai Jeerapan, Pracha Laoauyporn, Sittichai Kanchanasutha
It was shown that the constrained layer either soft PZT or hard PZT affected various properties including the dome geometry, the strain-E-field response, and the displacement hysteresis loop.
Recently the development of single crystal relaxor ferroelectrics based on PMN-PT and PZN-PT) exhibits superior electromechanical properties and strains over 1 % compared to PZT [3].
The measured effective electrical properties (d33eff and K33eff) were lower than the calculated values.
Bryant, Thin-layer composite unimorph ferroelectric driver and sensor properties, Materials Lett. 35 (1998) 39-49
[10] S.A.Wise, Displacement properties of RAINBOW and THUNDER piezoelectric actuators, Sens Actuators A. 69 (1998) 33-38
Recently the development of single crystal relaxor ferroelectrics based on PMN-PT and PZN-PT) exhibits superior electromechanical properties and strains over 1 % compared to PZT [3].
The measured effective electrical properties (d33eff and K33eff) were lower than the calculated values.
Bryant, Thin-layer composite unimorph ferroelectric driver and sensor properties, Materials Lett. 35 (1998) 39-49
[10] S.A.Wise, Displacement properties of RAINBOW and THUNDER piezoelectric actuators, Sens Actuators A. 69 (1998) 33-38
Online since: May 2013
Authors: Azlan Abdul Aziz, Rabizah Makhsin Siti, Nurul Sabihah Zakaria, Khairunisak Abdul Razak
The size of AuNP determines their unique optic, electronic and magnetic properties.
AuNP have increasingly gain interest due to their unique properties ofcontrolable morphology [5] and size dispersion [6,7], less toxicity and ease in synthesis and detection.
Besides, AFM is normally a surface investigation that not only gives the information about topographical but enable to deliver multiple information on material properties such as electrical, mechanical and chemical characterization when the tip make a contact with the sample surface.
Furthermore, AFM imaging requires the particle to be rigidly anchoring to a substrate.AuNP are very sensitive to their environment factors such as pH, temperature, electrolyte and solvent.
However, this not affect the height of the measurement that was used to determine the size of nanoparticle but it effect the overall surface features.
AuNP have increasingly gain interest due to their unique properties ofcontrolable morphology [5] and size dispersion [6,7], less toxicity and ease in synthesis and detection.
Besides, AFM is normally a surface investigation that not only gives the information about topographical but enable to deliver multiple information on material properties such as electrical, mechanical and chemical characterization when the tip make a contact with the sample surface.
Furthermore, AFM imaging requires the particle to be rigidly anchoring to a substrate.AuNP are very sensitive to their environment factors such as pH, temperature, electrolyte and solvent.
However, this not affect the height of the measurement that was used to determine the size of nanoparticle but it effect the overall surface features.
Online since: May 2011
Authors: Wen Pan, Liang Bin Qin, Xiao Dong Yang, Yu Bai, Zhong Tao
The mechanical properties of the specimens are obtained through test.
Introduction For the advantages of the raw soil building, such as available local materials, adaptation to local conditions, simple technology, low cost and good thermal insulation properties, it is widely constructed in the majority of towns and villages in western China, especially in the remote mountain areas.
The strength test method of adobe and mud is designed in reference to "Test Method for the Bricks of Building Walls" (GB/T2524-2003) [2] and "Test Method for Key Properties of Constructional Mortar" (JGJ70-90) [3].
The influence which pine affect compressive strength of adobe and the optimal ratio of pine and are obtained by statistical methods .
(1) Comparing with the wall building with the traditional method, the improved earth wall significantly increases the failure load and the average load reaching by 124%, strengthens the stability and enhances the ductility factor
Introduction For the advantages of the raw soil building, such as available local materials, adaptation to local conditions, simple technology, low cost and good thermal insulation properties, it is widely constructed in the majority of towns and villages in western China, especially in the remote mountain areas.
The strength test method of adobe and mud is designed in reference to "Test Method for the Bricks of Building Walls" (GB/T2524-2003) [2] and "Test Method for Key Properties of Constructional Mortar" (JGJ70-90) [3].
The influence which pine affect compressive strength of adobe and the optimal ratio of pine and are obtained by statistical methods .
(1) Comparing with the wall building with the traditional method, the improved earth wall significantly increases the failure load and the average load reaching by 124%, strengthens the stability and enhances the ductility factor
Online since: February 2012
Authors: Michele Monno, Matteo Strano, Andrea Rossi
With this respect, the epistemic variability in stochastic variables may only influence the value of the optimal solution, but will not affect the probability of failure.
Equation (8) can be simplified as: , (9) where gc and gt are constant values, expressed in [€/mm2] or [MJ/mm2], which might be affected by epistemic uncertainty.
Fig. 3: Fatigue limits (safety factor=2) of typical steel for tensioning wires and cast iron for frames.
On the contrary, when the optimization deals with forming processes rather than forming machines, the material properties or the model itself are the main concern with respect to uncertainty.
Chinese Journal of Mechanical Engineering (2006) 42:03
Equation (8) can be simplified as: , (9) where gc and gt are constant values, expressed in [€/mm2] or [MJ/mm2], which might be affected by epistemic uncertainty.
Fig. 3: Fatigue limits (safety factor=2) of typical steel for tensioning wires and cast iron for frames.
On the contrary, when the optimization deals with forming processes rather than forming machines, the material properties or the model itself are the main concern with respect to uncertainty.
Chinese Journal of Mechanical Engineering (2006) 42:03
Online since: February 2007
Authors: Bo Wang, Hong Jie Wang, Guan Jun Qiao, Zhi Hao Jin, Jun Yang, Jian Feng Yang, Ji Qiang Gao
Preparation and Characterization of Rod-like β-Si3N4 Seeds
Jun Yang
1, 2, Bo Wang
1, Jiqiang Gao
1, Jianfang Yang
1, Guanjun Qiao
1,
Hongjie Wang
1 and Zhihao Jin
1
1
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xian 710049,
People's Republic of China
2
Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
Keywords: β-Si3N4 powder, Rod-like β-Si3N4 seeds, Preparation, Characterization
Abstract.
Despite mechanical characteristics, the wide potential application of this material is still hampered by its relatively low and unpredictable brittle fracture.
In certain essence, the idea β-Si3N4 seed is one of the most important factor for making self-reinforced silicon nitride ceramics, and this reason inspire the interests some researchers.
The resultant rod-like β-Si3N4 grains morphology is affected by the property of additives.
The heterogeneous nucleation was preferred for the uniform grain growth, while, α- to β- phase transformation was a main factor for formation of the rod-like β-Si3N4 grain.
Despite mechanical characteristics, the wide potential application of this material is still hampered by its relatively low and unpredictable brittle fracture.
In certain essence, the idea β-Si3N4 seed is one of the most important factor for making self-reinforced silicon nitride ceramics, and this reason inspire the interests some researchers.
The resultant rod-like β-Si3N4 grains morphology is affected by the property of additives.
The heterogeneous nucleation was preferred for the uniform grain growth, while, α- to β- phase transformation was a main factor for formation of the rod-like β-Si3N4 grain.
Online since: February 2015
Authors: Han Huang, Zhi Kai Huang, Mou You Lin, Ling Ying Hou
Character Segmentation of Chinese Rubbing Images Using Total Variation Preprocess
Han Huang1, Zhi-Kai Huang2, Mou-You Lin2, Ling-Ying Hou2
1School of Mechanical and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150080, China
2College of Mechanical and Electrical Engineering, Nanchang Institute of Technology, Nanchang, Jiangxi 330099,China
863503892@qq.com
huangzhik2001@163.com
Keywords: Image Denoising, Chinese Calligraphy Images, Total Variation, Image Segmentation
Abstract.
We can think that Chinese characters segmentation is often easier than in other languages characters rarely need to be split apart, however, owing to the characteristics of stone inscriptions and the acquisition of objective factors of the environment, the original inscription images are filled with so much image noise that it may seriously affects the observation and research for inscription images, as shown in the an examples of rubbed calligraphy documents in Figure 1.
Edge Preserving Total Variation-Based Image Smoothing Early methods for doing image denoising were based on least squares and had the unfortunate property of either smoothing edges or creating spurious oscillations near edges, i.e., the well known ringing phenomenon.
We can think that Chinese characters segmentation is often easier than in other languages characters rarely need to be split apart, however, owing to the characteristics of stone inscriptions and the acquisition of objective factors of the environment, the original inscription images are filled with so much image noise that it may seriously affects the observation and research for inscription images, as shown in the an examples of rubbed calligraphy documents in Figure 1.
Edge Preserving Total Variation-Based Image Smoothing Early methods for doing image denoising were based on least squares and had the unfortunate property of either smoothing edges or creating spurious oscillations near edges, i.e., the well known ringing phenomenon.
Online since: June 2024
Authors: Sugeng Winardi, K. Kusdianto, Suci Madhania, Mohammad Irwan Fatkhur Rozy, Jauharatul Wardah
Velo-Gala et al. (2013) when exposed to UV light, activated carbon exhibits photoactive and semiconductor properties [14].
On the other hand, Cruz et al, (2017) mentioned that producing composite materials with combined or synergistic features like high surface area, mechanical strength, thermostability and insolubility, antibacterial capacity, and photocatalytic properties will be possible by growing semiconductors onto activated carbon [2].
Irradiation time, light intensity source, and MB concentration are factors that can affect MB photodegradation [27].
Arya et al., “Review—Influence of Processing Parameters to Control Morphology and Optical Properties of Sol-Gel Synthesized ZnO Nanoparticles,” ECS J.
Hameed, “Parameters affecting the photocatalytic degradation of dyes using TiO2-based photocatalysts: A review,” J.
On the other hand, Cruz et al, (2017) mentioned that producing composite materials with combined or synergistic features like high surface area, mechanical strength, thermostability and insolubility, antibacterial capacity, and photocatalytic properties will be possible by growing semiconductors onto activated carbon [2].
Irradiation time, light intensity source, and MB concentration are factors that can affect MB photodegradation [27].
Arya et al., “Review—Influence of Processing Parameters to Control Morphology and Optical Properties of Sol-Gel Synthesized ZnO Nanoparticles,” ECS J.
Hameed, “Parameters affecting the photocatalytic degradation of dyes using TiO2-based photocatalysts: A review,” J.
Online since: July 2015
Authors: Mircea Burca, Dan Dubină, Ştefan Benzar, Viorel Ungureanu
For resistance spot welding, the largest cost factors identified were energy consumption and frequency of electrode replacement.
They found that the type of electrode, high current setting and proper welding technique affect the quality of arc-spot welds in multi-layer connections.
The new technical solution: specimens, material and connection properties An experimental program was carried out at the CEMSIG Research Centre (http://www.ct.upt.ro/en/centre/cemsig) of the Politehnica University of Timisoara.
The full-scale testing program was completed with tensile tests to determine both the material properties for beam components and the behaviour of connections.
In order to determine the mechanical properties of the CWB components, a set of samples were cut out from the lipped channels, corrugated sheet, both from the flat regions and corners and reinforcing shear panels, according to EN ISO 6892-1:2009 [6] specifications [1,2].
They found that the type of electrode, high current setting and proper welding technique affect the quality of arc-spot welds in multi-layer connections.
The new technical solution: specimens, material and connection properties An experimental program was carried out at the CEMSIG Research Centre (http://www.ct.upt.ro/en/centre/cemsig) of the Politehnica University of Timisoara.
The full-scale testing program was completed with tensile tests to determine both the material properties for beam components and the behaviour of connections.
In order to determine the mechanical properties of the CWB components, a set of samples were cut out from the lipped channels, corrugated sheet, both from the flat regions and corners and reinforcing shear panels, according to EN ISO 6892-1:2009 [6] specifications [1,2].
Online since: March 2011
Authors: Zhou Hua Jiang, Hua Bing Li, Wan Ming Li
Introduction
High nitrogen steels are becoming a new type of engineering material with the progress of metallurgical technology due to their excellent mechanical properties and corrosion resistance.
It has become a fatal restricting factor in the industrial progress of high nitrogen steels.
Fig.2 Temperature field of 300s pouring at 1550°C Fig. 3 Temperature gradient at 1550°C Isotherm moving rate can be calculated using equation (3): (3) Among them, is cooling rate,and its unit is °C/s; is temperature gradient and its unit is °C/m; both can affect the value of U, which determines the solute distribution in dendrite crystal.
It has become a fatal restricting factor in the industrial progress of high nitrogen steels.
Fig.2 Temperature field of 300s pouring at 1550°C Fig. 3 Temperature gradient at 1550°C Isotherm moving rate can be calculated using equation (3): (3) Among them, is cooling rate,and its unit is °C/s; is temperature gradient and its unit is °C/m; both can affect the value of U, which determines the solute distribution in dendrite crystal.