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Online since: February 2014
Authors: Zuraini Mohd Enggsa, Arfidian Rachman, Tri Suyono, M. Mehdi, Kamaruzzaman Sopian, Sohif Mat
This desiccant wheel is capable of condensing water at 0.05kgH2O/s and providing 3.3639 kW load reduction.
With this significant load reduction, the component integrated in solar hybrid desiccant air-conditioning system can perform comfort cooling to area with high latent load such as hall, hyper market and commercial building. 1.Introduction The emphasis on the design of energy efficient air conditioning systems for both industrial and comfort applications is becoming a priority in the light of continuing rise in energy demand, cost and the environmental problems most notably the climate change.
ADAM data acquisition has been used to do monitoring and recording of temperature, humidity, air flow rate in each stage of air process and also radiation intensity.
Fig.2 Sensible process of desiccant wheel Fig.3 Theoretical and experimental sensible dehumidification Fig.4 Dehumidification Sensible Effectiveness Theoretically, the value of absolute humidity 0.024 kgH2O/kgdry.air at dehumidification process result a reduction to 0.017 kgH2O/kgdry.air while the experimental value is 0.0167 kgH2O/kgdry.air.
With this significant load reduction, the component integrated in solar hybrid desiccant air-conditioning system can perform comfort cooling to area with high latent load such as hall, hyper market and commercial building. 1.Introduction The emphasis on the design of energy efficient air conditioning systems for both industrial and comfort applications is becoming a priority in the light of continuing rise in energy demand, cost and the environmental problems most notably the climate change.
ADAM data acquisition has been used to do monitoring and recording of temperature, humidity, air flow rate in each stage of air process and also radiation intensity.
Fig.2 Sensible process of desiccant wheel Fig.3 Theoretical and experimental sensible dehumidification Fig.4 Dehumidification Sensible Effectiveness Theoretically, the value of absolute humidity 0.024 kgH2O/kgdry.air at dehumidification process result a reduction to 0.017 kgH2O/kgdry.air while the experimental value is 0.0167 kgH2O/kgdry.air.
Online since: May 2016
Authors: Monica Cîrstoiu, Razvan Ene, Catalin Cirstoiu, Iulian Antoniac, Mihai Nica, Patricia Ene, Zsombor Panti, Marian Pleniceanu
The data was analysed using Student's t-test and a comparison between the two groups was devised.
The data was analysed using Student's t-test and a comparison between the two groups was devised.
All clinical data and statistics related to the patients involved in our study are shown in table 1.
Our results are consistent with the data reported by others concerning union times [15].
Meta-analysis of data sugests that reconstruction type cephalo-medullary nails may provide superior results [16].
The data was analysed using Student's t-test and a comparison between the two groups was devised.
All clinical data and statistics related to the patients involved in our study are shown in table 1.
Our results are consistent with the data reported by others concerning union times [15].
Meta-analysis of data sugests that reconstruction type cephalo-medullary nails may provide superior results [16].
Online since: January 2013
Authors: Milan Brandt, Aleksandar Subic, Mohammad Babaee, Martin Leary
Additive Manufacture
The ASTM [1] defines Additive Manufacture as the "process of joining materials to make objects from 3D model data, usually layer upon layer, as opposed to subtractive manufacturing methodologies, such as traditional machining.”
Robust (left), Compromised (centre), Failed (right) Based on this experimental data, the minimum build angle fmin, versus orientation angles α1 and α2, data for the polyhedra of interest (Figs. 9-12) can be presented in terms of the associated FDM integrity.
This data will be of interest to researchers and practitioners who will may, under certain circumstance, allow a geometry that includes some surface defects, but is nonetheless self-supporting.
The combination of FDM integrity data and charts of minimum build angle allows the feasibility of for self-supporting geometry to be presented.
This data can be utilised in the design of tessellated geometries with known build orientations
Robust (left), Compromised (centre), Failed (right) Based on this experimental data, the minimum build angle fmin, versus orientation angles α1 and α2, data for the polyhedra of interest (Figs. 9-12) can be presented in terms of the associated FDM integrity.
This data will be of interest to researchers and practitioners who will may, under certain circumstance, allow a geometry that includes some surface defects, but is nonetheless self-supporting.
The combination of FDM integrity data and charts of minimum build angle allows the feasibility of for self-supporting geometry to be presented.
This data can be utilised in the design of tessellated geometries with known build orientations
Online since: September 2014
Authors: Yu Xin Gao, Bao Jun Cheng, Li Li Jia, Xiong Wu, Jia Chao Lin, Yuan Peng
Compared with C0, the rheological properties of C1 which has the same amount of cementing material while with no zeolite powder, little cement and more microspheres is quite different , which is especially evident in yield stress and viscosity reduction.
Figure 5 shows that when the zeolite powder content is less than 4% , zeolite powder’s addition has greater impact on compressive strength at early age but less impact at later age according to the C1~C4’s data.
When the addition of zeolite is 4%, the compressive strength reduction of concrete at 3d, 28d, and 56d is 11.2%, 8.1%, and 4.5% compared with standard concrete.
When the ratio of zeolite powder is 2% (C3), the self-shrinkage reduction of group C1 at 1d, 3d, 7d and14d is 77.1%, 49.6%, 44.0% and 38.1%respectively.
The reduction electric flux of group C3 at 28d is 18.5% of that of group C1, showing that the effect of zeolite powder’s self-curing can improve the chloride-penetration resistance of concrete.
Figure 5 shows that when the zeolite powder content is less than 4% , zeolite powder’s addition has greater impact on compressive strength at early age but less impact at later age according to the C1~C4’s data.
When the addition of zeolite is 4%, the compressive strength reduction of concrete at 3d, 28d, and 56d is 11.2%, 8.1%, and 4.5% compared with standard concrete.
When the ratio of zeolite powder is 2% (C3), the self-shrinkage reduction of group C1 at 1d, 3d, 7d and14d is 77.1%, 49.6%, 44.0% and 38.1%respectively.
The reduction electric flux of group C3 at 28d is 18.5% of that of group C1, showing that the effect of zeolite powder’s self-curing can improve the chloride-penetration resistance of concrete.
Online since: July 2019
Authors: Chen Xiao Li, Yue Kai Xue, Shu Huan Wang
After the reduction of converter slag and carbon at 1800℃, 62.7% of P in the slag went into the hot metal while 32.8% of P was gasified and removed Into the atmosphere.
In consideration of the loss of coke powder in the reduction process, the experiments plan to use about 2.5 times carbon equivalent, which means 12.25g coke / 100g steel slag.
Fig.3 Dackscattered electron image and elements distribution of slag Fig.4 Dackscattered electron image and elements distribution of slag In order to quantitatively study the distribution characteristics of P element in Slag micro-zone, the EDS analysis data of different micro-regions are summarized and analyzed.
Research on Carbothermic Reduction for Dephosphorization from Converter Slag by Microwave Heating[J].
Thermodynamic Analysis of Gasification and Dephosphorization of Slag in Silicon Reduction Converter.
In consideration of the loss of coke powder in the reduction process, the experiments plan to use about 2.5 times carbon equivalent, which means 12.25g coke / 100g steel slag.
Fig.3 Dackscattered electron image and elements distribution of slag Fig.4 Dackscattered electron image and elements distribution of slag In order to quantitatively study the distribution characteristics of P element in Slag micro-zone, the EDS analysis data of different micro-regions are summarized and analyzed.
Research on Carbothermic Reduction for Dephosphorization from Converter Slag by Microwave Heating[J].
Thermodynamic Analysis of Gasification and Dephosphorization of Slag in Silicon Reduction Converter.
Online since: April 2009
Authors: Feliks Stobiecki, M. Kisielewski, N. Nurgazizov, P. Zhdan
However, due to residual magnetisation,
a MFM probe can introduce distortions to the micromagnetic structure or even change it during
acquisition of the MFM data [3,4] and therefore these factors should be considered very seriously
when interpreting the acquired MFM images.
To reduce the potential inducing effect of the MFM tip on acquired data, a magnetic Co layer was deposited only to one (the external) side of the probe instead of its deposition on the whole chip (as with the majority of commercial MFM probes).
Quantitative analysis of the data presented in a Fig. 1c demonstrated that periodicity of the domain structure in the sample was equal to 170-200 nm.
Detailed analysis of the obtained MFM data leads to the conclusion that the propensity of the MFM probe to modify the sample micromagnetic structure during double-pass scanning can be significantly reduced by decreasing the amount of magnetic material deposited on the MFM tip.
Presented results demonstrate the large contribution of the interaction between the MFM tip and the micromagnetic structure of the sample to acquired MFM data.
To reduce the potential inducing effect of the MFM tip on acquired data, a magnetic Co layer was deposited only to one (the external) side of the probe instead of its deposition on the whole chip (as with the majority of commercial MFM probes).
Quantitative analysis of the data presented in a Fig. 1c demonstrated that periodicity of the domain structure in the sample was equal to 170-200 nm.
Detailed analysis of the obtained MFM data leads to the conclusion that the propensity of the MFM probe to modify the sample micromagnetic structure during double-pass scanning can be significantly reduced by decreasing the amount of magnetic material deposited on the MFM tip.
Presented results demonstrate the large contribution of the interaction between the MFM tip and the micromagnetic structure of the sample to acquired MFM data.
Online since: December 2014
Authors: Yan Ying Guo, Zhi Gang Liu
An incremental risk reduction programmer is proposed.
The first step of which is to field example sensors in an airport environment to collect the data with which to validate the conclusions of this report and to develop the data processing algorithms.
The structuring element (SE) g has a normalized weight factor and its elements are calculated such that the center point’s weighted is 1 and the farthest point’s weight is assigned a weight factor, leading to an emphasis on the effect of the central point and a reduction of the effect of the neighborhood points.
The structuring element g has a membership factor and its elements are calculated such that the edge points’ memberships are 1 and the rest points’ memberships are assigned a membership factor, leading to an emphasis on the effect of the edge points and a reduction of the effect of the neighborhood points.
The first step of which is to field example sensors in an airport environment to collect the data with which to validate the conclusions of this report and to develop the data processing algorithms.
The structuring element (SE) g has a normalized weight factor and its elements are calculated such that the center point’s weighted is 1 and the farthest point’s weight is assigned a weight factor, leading to an emphasis on the effect of the central point and a reduction of the effect of the neighborhood points.
The structuring element g has a membership factor and its elements are calculated such that the edge points’ memberships are 1 and the rest points’ memberships are assigned a membership factor, leading to an emphasis on the effect of the edge points and a reduction of the effect of the neighborhood points.
Online since: July 2007
Authors: Xing Dong Zhang, Xu Dong Li, Yong Lie Chao, J. Ma, K. Zhao, B. Shi
The
introduction of additive aids is believed to be an efficient means for the reduction of sintering
temperature and the control of grain growth.
The data as a function of pressing force are listed in Figure 3.
However, as described above, a system of TiO2, MgO, SiO2 and CaO was used as additive aids in this study, a combinative effect was plausible for the explanation of the reduction in sintering temperature and acquirement of good densification. 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 5 6 7 8.2 9 pressing force�KN� density�g/cm 3 � 2 2.5 3 3.5 4 4.5 5 6 7 8.2 9 pressing force�KN� vickers hardness�GPa� Figure 3 Density of the green bulk (upper) and Vickers hardness of the products sintered at 1450°C (lower) as a function of the initial die pressing force Figure 4 Comparative SEM photographs of the sintered product without TiO2 (left, 86.76%Al2O3, 9.70%ZrO2, 1.21%SiO2, 1.21%MgO and 1.12%CaO) and the product containing TiO2 (right, 78.18%Al2O3, 17.74%ZrO2, 0.12%SiO2, 0.78%MgO, 2.63%TiO2 and 0.67%CaO) Another two kinds of ZTA nano-ceramic composites were further studied.
Obviously, the good result achieved with the composition of 80.55%Al2O3, 13.95%ZrO2, 0.46%SiO2, 1.05%MgO, 2.79%TiO2 and 1.20%CaO is due to the combinative effect of TiO2, MgO, SiO2 and CaO system, including the prohibition of abnormal grain growth and the reduction of sintering temperature.
The relevant study provides reliable data for the exploration of such ceramics as dental prosthetic materials.
The data as a function of pressing force are listed in Figure 3.
However, as described above, a system of TiO2, MgO, SiO2 and CaO was used as additive aids in this study, a combinative effect was plausible for the explanation of the reduction in sintering temperature and acquirement of good densification. 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 5 6 7 8.2 9 pressing force�KN� density�g/cm 3 � 2 2.5 3 3.5 4 4.5 5 6 7 8.2 9 pressing force�KN� vickers hardness�GPa� Figure 3 Density of the green bulk (upper) and Vickers hardness of the products sintered at 1450°C (lower) as a function of the initial die pressing force Figure 4 Comparative SEM photographs of the sintered product without TiO2 (left, 86.76%Al2O3, 9.70%ZrO2, 1.21%SiO2, 1.21%MgO and 1.12%CaO) and the product containing TiO2 (right, 78.18%Al2O3, 17.74%ZrO2, 0.12%SiO2, 0.78%MgO, 2.63%TiO2 and 0.67%CaO) Another two kinds of ZTA nano-ceramic composites were further studied.
Obviously, the good result achieved with the composition of 80.55%Al2O3, 13.95%ZrO2, 0.46%SiO2, 1.05%MgO, 2.79%TiO2 and 1.20%CaO is due to the combinative effect of TiO2, MgO, SiO2 and CaO system, including the prohibition of abnormal grain growth and the reduction of sintering temperature.
The relevant study provides reliable data for the exploration of such ceramics as dental prosthetic materials.
Experimental Research on Mechanical Properties of Recycled Aggregate Concrete under Uniaxial Loading
Online since: March 2013
Authors: Mei Ling Duan, Xue Yong Zhao
With the increasing of recycled coarse aggregate contents (30%, 50%&100%), the elastic modulus of RC gradually lowered; for different compressive strength levels, with the reduction of W/C, the elastic modulus of RC increased.
In the previous studies, generally agreed that the elastic modulus of RC is lower than NC, the reduction is about in 15% ~ 40% [8], and it is consistent with our test results.
The reduction of elastic modulus will result in increased deformation under the load.
In order to better respond to the relationship between Ec and fcu, in this paper, we combine the data of the experiment with the relevant test data of the domestic and foreign scholars, we carried on the statistical regression analysis and obtained the equation of Ec for RC as follows: (4) equation (4) can better reflect the relationship between Ec and fcu for the RC and fit best to the results of experiment.
In the previous studies, generally agreed that the elastic modulus of RC is lower than NC, the reduction is about in 15% ~ 40% [8], and it is consistent with our test results.
The reduction of elastic modulus will result in increased deformation under the load.
In order to better respond to the relationship between Ec and fcu, in this paper, we combine the data of the experiment with the relevant test data of the domestic and foreign scholars, we carried on the statistical regression analysis and obtained the equation of Ec for RC as follows: (4) equation (4) can better reflect the relationship between Ec and fcu for the RC and fit best to the results of experiment.
Online since: October 2011
Authors: Pei Hao Zhu, Lian Hong Zhang, Bing Yu, Qi Zhi Xie
Tab. 1 Analysis results of rod 1and rod 4 with the mechanics of materials
Test number
of 1,4 bar
The initial preload
(MN)
Final preload
(MN)
Reduction the amount
of preload (MN)
Preload reduction
rate (%)
1
19.6
14.5
5.1
26.01
2
23.2
17.1
6.1
26.29
3
42
31
11
26.19
4
44.6
32.9
11.7
26.23
5
46.5
34.3
12.2
26.24
6
55.4
40.9
14.5
26.17
7
64.4
47.5
16.9
26.24
Fig. 3 Analysis steps of preload force with abaqus
3 Analysis of tie rod preload of 100MN hydraulic press with the finite element
Obviously, total preload force of four tie rods with 100MN hydraulic press is F=1.3×108N, the preload force of each tie rod with =3.25×107N can be obtained.
In order to ensure that each tie rod of final preload force is the same value, the rod 1 and rod 4 of the initial preload force must Tab.2 Analysis results of rod 1and rod 4 with the finite element Test number of 1,4 bar The initial preload (MN) Final preload (MN) Reduce the amount of preload (MN) Preload reduction rate (%) 1 30 14.5 15.5 51.67 2 34 17.1 16.9 49.71 3 55 31 24 43.64 4 58 32.9 25.1 43.28 5 60 34.3 25.7 42.83 6 70 40.9 29.1 41.57 7 80 47.5 32.5 40.63 be calculated as follows: (1) rod1 and rod4 with the initial preload force of seven groups (30MN, 34MN, 55MN, 58MN, 60MN, 70MN, 80MN) are set.
Fig. 7 illustrates this preloading process of rod 1, and Tab. 2 shows seven groups data with ABAQUS. (2) the rod2 and rod3 with 32.5MN of the initial preload force are applied, which is submitted for analyzing and calculating with ABAQUS[11-12]. (3) the results are outputted.
Fig. 4 Stress Analysis results of frame Fig. 5 Stress analysis results of preload force with rods Fig. 6 Displacement analysis results of preload force Fig. 7 Multi-steps analysis of rod 1 in preload force Fig. 8 The fitting curve of 1,4 rod preload force changes Tab. 3 The Analysis data of 1,4 rod in preload force X / MN final preload 14.70 17.40 31.40 33.40 34.80 41.40 48.00 Y / MN initial preload 30.00 34.00 55.00 58.00 60.00 70.00 80.00 According to the preload force analysis of the definition steps, the analysis results with 100MN hydraulic press of preload force are obtained: (1) preload force of the first group tie rods reduce; (2) final preload force of the second group tie rods equals to initial preload. 4 Conclusions This paper conducts the study on the preload force of 100MN hydraulic press with respectively mechanics of materials and the finite element methods, which calculates the four tie rods of the initial preload force, and compares
In order to ensure that each tie rod of final preload force is the same value, the rod 1 and rod 4 of the initial preload force must Tab.2 Analysis results of rod 1and rod 4 with the finite element Test number of 1,4 bar The initial preload (MN) Final preload (MN) Reduce the amount of preload (MN) Preload reduction rate (%) 1 30 14.5 15.5 51.67 2 34 17.1 16.9 49.71 3 55 31 24 43.64 4 58 32.9 25.1 43.28 5 60 34.3 25.7 42.83 6 70 40.9 29.1 41.57 7 80 47.5 32.5 40.63 be calculated as follows: (1) rod1 and rod4 with the initial preload force of seven groups (30MN, 34MN, 55MN, 58MN, 60MN, 70MN, 80MN) are set.
Fig. 7 illustrates this preloading process of rod 1, and Tab. 2 shows seven groups data with ABAQUS. (2) the rod2 and rod3 with 32.5MN of the initial preload force are applied, which is submitted for analyzing and calculating with ABAQUS[11-12]. (3) the results are outputted.
Fig. 4 Stress Analysis results of frame Fig. 5 Stress analysis results of preload force with rods Fig. 6 Displacement analysis results of preload force Fig. 7 Multi-steps analysis of rod 1 in preload force Fig. 8 The fitting curve of 1,4 rod preload force changes Tab. 3 The Analysis data of 1,4 rod in preload force X / MN final preload 14.70 17.40 31.40 33.40 34.80 41.40 48.00 Y / MN initial preload 30.00 34.00 55.00 58.00 60.00 70.00 80.00 According to the preload force analysis of the definition steps, the analysis results with 100MN hydraulic press of preload force are obtained: (1) preload force of the first group tie rods reduce; (2) final preload force of the second group tie rods equals to initial preload. 4 Conclusions This paper conducts the study on the preload force of 100MN hydraulic press with respectively mechanics of materials and the finite element methods, which calculates the four tie rods of the initial preload force, and compares