Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: January 2012
Authors: Qiang Guo, Lu Tang, Yan Bei Chen, Xiang Liang Ning
The two contrast curves indicate that the fitting curve’s exponent of experimental data conducted by Matlab toolbox ranges from 0.35 to 0.45, which is meeting to the design value; And the simulation curve is agree well with the experimental curve, but there’s also a certain error between them.
Through the analysis of the basic experimental data, the reasons of the error between numerical and experimental results can be summarized as following: a) The experimental data in smaller than the numerical simulation data in the same working-condition due to the oil leak inside the damper with a high oil pressure; b) There’s a certain measuring error of silicone oil’s natural parameters; c) The numerical simulation model is a ideal model has not taken the viscosity-temperature characteristic of silicone oil into consideration, and there will be a obviously viscosity reduction when there’s a temperature increment[7].
Through the analysis of the basic experimental data, the reasons of the error between numerical and experimental results can be summarized as following: a) The experimental data in smaller than the numerical simulation data in the same working-condition due to the oil leak inside the damper with a high oil pressure; b) There’s a certain measuring error of silicone oil’s natural parameters; c) The numerical simulation model is a ideal model has not taken the viscosity-temperature characteristic of silicone oil into consideration, and there will be a obviously viscosity reduction when there’s a temperature increment[7].
Online since: December 2009
Authors: Tatsumi Ishihara, Gakuji Uozumi, Hiroyuki Eto, Taner Akbay, Jun Akikusa, Norihisa Chitose, Toru Inagaki
In this paper, design features of the cell-stack
and the typical performance data of the cell and the 10kW-class CHP system are presented.
As is the case with other FC systems, cost reduction is one of the highest hurdles for the volume commercialization of our SOFC.
Typical cell performance data measured at current density of 0.3 A/cm2 with fuel utilization (Uf) of 70% are listed in the Table 1.
Table 1 contains performance data obtained under steam reforming condition at 650°C with steam to carbon ratio (S/C) of 3.
Typical performance data of the single-cell stack-unit (0.3 A/cm2, Uf = 70%).
As is the case with other FC systems, cost reduction is one of the highest hurdles for the volume commercialization of our SOFC.
Typical cell performance data measured at current density of 0.3 A/cm2 with fuel utilization (Uf) of 70% are listed in the Table 1.
Table 1 contains performance data obtained under steam reforming condition at 650°C with steam to carbon ratio (S/C) of 3.
Typical performance data of the single-cell stack-unit (0.3 A/cm2, Uf = 70%).
Online since: December 2011
Authors: Wei Wei Shi, Yue Gang Tan, Ting Ting Hu
Measurements were taken with a distance of 60 mm between the FBG and transducer, then increased the distance by step of 20 mm and recorded the data for 9 times.
The second group of experiment was: keeping the distance between FBG and transducer constantly for 200mm, changed the position of the transducer with the angles of 10°, 20°, 30°... 90° relative to the optical axis and recorded data respectively.
As for the first group of experiment, nine groups of data are collected while transducer is moved in the axial direction of the fiber.
The relationship between angle and signal intensity Even so, from the testing data and experimental process, it is obvious that the signal is easy to gain when the driving source is in the axial direction of FBG, the testing amplitude in this direction is higher than the radial direction of the fiber.
Thus, effective noise reduction and characteristic signal collection become problems that need to work out in future.
The second group of experiment was: keeping the distance between FBG and transducer constantly for 200mm, changed the position of the transducer with the angles of 10°, 20°, 30°... 90° relative to the optical axis and recorded data respectively.
As for the first group of experiment, nine groups of data are collected while transducer is moved in the axial direction of the fiber.
The relationship between angle and signal intensity Even so, from the testing data and experimental process, it is obvious that the signal is easy to gain when the driving source is in the axial direction of FBG, the testing amplitude in this direction is higher than the radial direction of the fiber.
Thus, effective noise reduction and characteristic signal collection become problems that need to work out in future.
Online since: August 2013
Authors: Feng Fei Jiang, Sheng Li Wang, Long Liu, Xiao Li Zhang, Zhao Xin Wang, Fei Fei He
According to the geological data of the venue, the upper fill, sand and other loose and soft soil are very thick, especially the depth of the sand layer is even more than 30m.And carrying out the process of forming holes in the loose and soft soil tends to cause hole collapse and hole shrinkage.
Based on design drawings and combined with the geological data of the venue, the maximum depth of drilling hole will be over 25m.Obviously,the drilling hole is very deep, especially piles with bigger pile diameter (such as Φ1400mm Φ1600mm Φ1800mm ).And it is difficult to clear holes.
In order to ensure that the depth of the pile end embedded the breeze rocks length meet design requirements, the pile bearing stratum should be estimated in advance based on a detailed survey of geological data (or ahead of drilling data).
With the reduction of the drilling residue the hole cleaning process can be replaced gradually by more dilute slurry until the final mud weight is controlled within 1.15-1.20.
Based on design drawings and combined with the geological data of the venue, the maximum depth of drilling hole will be over 25m.Obviously,the drilling hole is very deep, especially piles with bigger pile diameter (such as Φ1400mm Φ1600mm Φ1800mm ).And it is difficult to clear holes.
In order to ensure that the depth of the pile end embedded the breeze rocks length meet design requirements, the pile bearing stratum should be estimated in advance based on a detailed survey of geological data (or ahead of drilling data).
With the reduction of the drilling residue the hole cleaning process can be replaced gradually by more dilute slurry until the final mud weight is controlled within 1.15-1.20.
Online since: May 2020
Authors: Nikita S. Deryabin, Sergey M. Chernyshev, Sergey N. Veselkov
The strain resistance of alloys at the different temperature-speed conditions is determined by the equation [1]:
, (1)
where α, n, A – the constants determined from experimental data; Q – the activation energy investigated by analysis of experimental data; Z – the function of Zener–Hollomon parameter:
The constants of the analytical Eq. 1 A α n Q, kJ/mol 4.6476*1016 0.0033 4.6725 4.363*105 Figure 1 gives data of the deformation behavior of the investigated alloy at given strain rate and temperatures of deformation.
Firstly, the specific roll pressure values are calculated by the following equation [7]: p=-32ηLL∆h∙3V1-4R2h1h1arctan2hx-h1h1-3Vxm2hx-h14hxh122hx-h1-5Vxm4hxh1-VRhxh122hx-h1+C0, (4) where hx is a half of the composite plate thickness; h1 is the composite plate thickness; η is the coefficient of the dynamic viscosity; L is the contact length; Δh is the absolute thickness reduction; R is the roller radius; Vxm and V1 are the velocities in the x direction corresponding hx and h1 respectively; C0 is the integral constant determined by boundary condition.
Future work should benefit greatly by using these data.
The constants of the analytical Eq. 1 A α n Q, kJ/mol 4.6476*1016 0.0033 4.6725 4.363*105 Figure 1 gives data of the deformation behavior of the investigated alloy at given strain rate and temperatures of deformation.
Firstly, the specific roll pressure values are calculated by the following equation [7]: p=-32ηLL∆h∙3V1-4R2h1h1arctan2hx-h1h1-3Vxm2hx-h14hxh122hx-h1-5Vxm4hxh1-VRhxh122hx-h1+C0, (4) where hx is a half of the composite plate thickness; h1 is the composite plate thickness; η is the coefficient of the dynamic viscosity; L is the contact length; Δh is the absolute thickness reduction; R is the roller radius; Vxm and V1 are the velocities in the x direction corresponding hx and h1 respectively; C0 is the integral constant determined by boundary condition.
Future work should benefit greatly by using these data.
Online since: January 2013
Authors: Takashi Nagoshi, Tso Fu Mark Chang, Tatsuo Sato, Masato Sone
Ion beam from side of the specimen allowed the fabrication of a pillar with uniform dimensions (non-tapered, non-filleted), which was favorable for acquiring precise experimental data.
The critical dimensions of the gage length and cross-sectional area were measured by scanning electron microscopy (SEM, S4300SE, Hitachi High Technologies Corp.) operated at 15 kV for the conversion of the load and displacement data to a stress-strain curve.
Tapering of the pillar results a spurious strain hardening and increased apparent yield [13], thus, it should be eliminated to acquire precise data.
Elastic deformation was removed from raw data, and then converted into true plastic strain under the assumption of uniform deformation.
(b) Size reduction of the pillar with irradiation at an incident angle of 45 degree.
The critical dimensions of the gage length and cross-sectional area were measured by scanning electron microscopy (SEM, S4300SE, Hitachi High Technologies Corp.) operated at 15 kV for the conversion of the load and displacement data to a stress-strain curve.
Tapering of the pillar results a spurious strain hardening and increased apparent yield [13], thus, it should be eliminated to acquire precise data.
Elastic deformation was removed from raw data, and then converted into true plastic strain under the assumption of uniform deformation.
(b) Size reduction of the pillar with irradiation at an incident angle of 45 degree.
Online since: November 2015
Authors: Adrian Ioana, Augustin Semenescu, Monika Březinová, Massimo Pollifroni, Dragoş Marcu
Operational performance indicators are also a tool for communicating environmental data through environmental reports or environmental statements, in accordance with the Eco-Management and Audit Scheme (EMAS) regulation [5-7].
Air pollution 1 – Chimney; 2 – Emissions Data about the condition of environmental media are usually measured and recorded by governmental institutions.
These data are used to derive specific environmental indicator systems for the main environmental problems.
The correlation environment – environment performance indicators (EPI) – organization EPI – Environment Performances Indicators; OM – Organization Management; OD – Offers Data It is recognized however that for organizations with less significant environmental impacts and a less complex environmental management system the most important indicators will be those related to operational performance.
- Where can environmental improvements also lead to cost reduction?
Air pollution 1 – Chimney; 2 – Emissions Data about the condition of environmental media are usually measured and recorded by governmental institutions.
These data are used to derive specific environmental indicator systems for the main environmental problems.
The correlation environment – environment performance indicators (EPI) – organization EPI – Environment Performances Indicators; OM – Organization Management; OD – Offers Data It is recognized however that for organizations with less significant environmental impacts and a less complex environmental management system the most important indicators will be those related to operational performance.
- Where can environmental improvements also lead to cost reduction?
Online since: September 2013
Authors: Zbigniew Pakiela, Tomasz Brynk, Anatolii Laptiev, Oleksandr Tolochyn
Moreover, DIC measurements deliver full field displacement description, therefore much more data is available for analysis in comparison to the measurements made only in a few points.
The results of the displacement fields measurements may be utilized as the input data to the inverse method algorithms which allow to calculate various materials parameters.
This study presents the investigation of the influence of the size of the area of DIC measurements from which the data points were taken into account in the calculations (fitting area) for the calculated stress intensity factor values and the crack length.
HE processing resulted in the reduction of the cylindrical ingot diameter from 50 to 12 mm in one pass and subsequent decrease in the average grain diameter from 51μm to 130 nm.
Larger plasticity of the microcrystalline sample might also explain lower number of successfully calculated data points in comparison to the submicrocrystalline counterpart even if the images for DIC measurement were collected with higher frequency during microcrystalline sample test.
The results of the displacement fields measurements may be utilized as the input data to the inverse method algorithms which allow to calculate various materials parameters.
This study presents the investigation of the influence of the size of the area of DIC measurements from which the data points were taken into account in the calculations (fitting area) for the calculated stress intensity factor values and the crack length.
HE processing resulted in the reduction of the cylindrical ingot diameter from 50 to 12 mm in one pass and subsequent decrease in the average grain diameter from 51μm to 130 nm.
Larger plasticity of the microcrystalline sample might also explain lower number of successfully calculated data points in comparison to the submicrocrystalline counterpart even if the images for DIC measurement were collected with higher frequency during microcrystalline sample test.
Online since: July 2020
Authors: Nandang Mufti, M. Tommy Hasan Abadi, Siti Zulaikah, Yudyanto Yudyanto, Siti Maryam
XRF data of Iron Sand Dlodo Beach Tulungagung
Element
Al
Si
P
Ca
Ti
V
Eu
Mn
Fe
Bi
Re
Others
quantity (%)
1
1.4
0.23
0.57
6.47
0.51
0.62
0.52
87.03
0.86
0.3
0.49
Based on Table 1 it can be seen that the content of the element iron (Fe) after extraction is 87.03%.
The diffraction patterns which have been obtained from the characterization were analyzed qualitatively by matching the data with the model to determine the crystal structure and phases formed in the sample as shown in Fig. 1.
Furthermore, a qualitative analysis was based on matching using a data model in a crystallographic data open database (COD) 1546383 as a comparison.
Based on the J-V curve, the maximum value of the reduction of current density is 0.23 mA/cm2.
The diffraction patterns which have been obtained from the characterization were analyzed qualitatively by matching the data with the model to determine the crystal structure and phases formed in the sample as shown in Fig. 1.
Furthermore, a qualitative analysis was based on matching using a data model in a crystallographic data open database (COD) 1546383 as a comparison.
Based on the J-V curve, the maximum value of the reduction of current density is 0.23 mA/cm2.
Online since: October 2017
Authors: Heri Sutanto, Eko Hidayanto, Mukholit Mukholit, Singgih Wibowo, Muhammad Irwanto
Results from MATCH program data processing can be seen in Fig. 2.
XRD data processing using MATCH program.
MATCH program data processing results do not show nitrogen (N) atom increasing in number because nitrogen concentration embedded within the framework of TiO2 is still too small.
The clarity of a solution can be represented in the absorbance data by testing using UV-Vis spectrophotometer and results of degradation are shown in Fig. 4.
Pongpomb, Sol–gel preparation and properties study of TiO2 thin film for photocatalytic reduction of chromium(VI) in photocatalysis process, Science and Technology of Advanced Materials, 6 (2005), 352–358
XRD data processing using MATCH program.
MATCH program data processing results do not show nitrogen (N) atom increasing in number because nitrogen concentration embedded within the framework of TiO2 is still too small.
The clarity of a solution can be represented in the absorbance data by testing using UV-Vis spectrophotometer and results of degradation are shown in Fig. 4.
Pongpomb, Sol–gel preparation and properties study of TiO2 thin film for photocatalytic reduction of chromium(VI) in photocatalysis process, Science and Technology of Advanced Materials, 6 (2005), 352–358