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Online since: September 2007
Authors: Gabriel Ferro, Gerhard Pensl, Kin Kiong Lee, Maher Soueidan
A least square fit to the data in Fig. 1b indicated
that the net donor concentration, Nd of the 3C-SiC film was 8.3 (± 0.3) × 10
16 cm-3, which gives an
excellent fit to the measured data in Fig. 1a.
We modelled the experimental data in terms of the theoretical work of Nicollian and Goetzberger [5], and we used the statistical model for the equivalent parallel conductance Gp from which the interface state density (Dit) can be extracted.
A theoretical fit to the experimental data results in the determination of Rs, σn, Dit and σs.
There appears a correlation between the decrease in the Dit and reduction of σn near the band edge, but further works are necessary in order to understand this phenomenon.
We modelled the experimental data in terms of the theoretical work of Nicollian and Goetzberger [5], and we used the statistical model for the equivalent parallel conductance Gp from which the interface state density (Dit) can be extracted.
A theoretical fit to the experimental data results in the determination of Rs, σn, Dit and σs.
There appears a correlation between the decrease in the Dit and reduction of σn near the band edge, but further works are necessary in order to understand this phenomenon.
Online since: October 2011
Authors: Chun Yuan Liu, Cheng Wei Liu, Jie Ding, Yu Lian Guo
In this paper, according to the data of Tangshan Binhai Avenue sandbag cofferdam’s landslide accident, we integrate stability checking calculation using method of limit equilibrium, analysis and adjustment of parameters, comparing with finite element numerical simulation and other means, in order to analyze this nearly horizontal plane landslide, summarize its genesis, deformation mechanism, and provide prevention basis for this kind of landslide.
Using the data got from soil experiment and displacement of embankment monitored on -site, we make back analysis of the soil’s mechanical parameters, main soil layer distribution and physical properties of this section are shown in Table 1.
Although this data has certain deviation with the actual result, it could explain the phenomenon that the cofferdam has been damaged and validate the results from limit equilibrium method.
Because the construction rate is rapid, the pore water is not easy to dissipate from foundation soil in low permeability layers, so the appropriate reduction of c, is needed to reducing the value of shear strength of soil and get results closer to the actual data.
Using the data got from soil experiment and displacement of embankment monitored on -site, we make back analysis of the soil’s mechanical parameters, main soil layer distribution and physical properties of this section are shown in Table 1.
Although this data has certain deviation with the actual result, it could explain the phenomenon that the cofferdam has been damaged and validate the results from limit equilibrium method.
Because the construction rate is rapid, the pore water is not easy to dissipate from foundation soil in low permeability layers, so the appropriate reduction of c, is needed to reducing the value of shear strength of soil and get results closer to the actual data.
Online since: May 2014
Authors: Suapphong Kritsanawonghong, Pawinee Iamtrakul, Wei Jun Gao, Soichiro Kuroki
From statistical data, the growth rate of convenient stores in Thailand is rapidly increasing [1].
The results from previous study [2] showed that the improvement of store’s envelopes can achieved the reduction of cooling load of the stores up to 10% only.
Table 1 shows the basic data regarding the construction of the store.
Basic information of the convenience store for this study Floor area in sales area / non-sales area 138 m2 / 50 m2 Ceiling height 2.64 m Store’s orientation North Sales area’s envelope materials Clear glass, 10 mm thick Non-sales area’s envelope materials Concrete wall, 100mm thick Roof’s material Metal sheet, 0.5mm thick & PE insulation, 10mm thick Methodology The analysis of the micro co-generation system comparing it to the conventional system was executed based on end-used demand data of hourly electricity energy consumption as illustrated in Fig. 3.
Data assumption for the analysis Fig.4: PES values with various micro-CHP capacities In this study, a micro co-generation system driven by natural gas is considered, combined with the utility electricity and air conditioning system in order to accommodate the energy demands.
The results from previous study [2] showed that the improvement of store’s envelopes can achieved the reduction of cooling load of the stores up to 10% only.
Table 1 shows the basic data regarding the construction of the store.
Basic information of the convenience store for this study Floor area in sales area / non-sales area 138 m2 / 50 m2 Ceiling height 2.64 m Store’s orientation North Sales area’s envelope materials Clear glass, 10 mm thick Non-sales area’s envelope materials Concrete wall, 100mm thick Roof’s material Metal sheet, 0.5mm thick & PE insulation, 10mm thick Methodology The analysis of the micro co-generation system comparing it to the conventional system was executed based on end-used demand data of hourly electricity energy consumption as illustrated in Fig. 3.
Data assumption for the analysis Fig.4: PES values with various micro-CHP capacities In this study, a micro co-generation system driven by natural gas is considered, combined with the utility electricity and air conditioning system in order to accommodate the energy demands.
Online since: July 2013
Authors: Sea Cheon Oh, Tae Gyung Ko, Y. Kim, Woo Teck Kwon, Soo Ryong Kim, Yoon Joo Lee, Ji Yeon Won
Results and discussion
Fig.1 shows the XRD data of the high and low purity silicon kerf.
XRD data confirms that the crystalline phases of two samples are different.
Particle size analysis data of high purity silicon kerf in Fig.5 shows uniform particle size distribution.
Conventional carbothermal reduction of SiO2 for the synthesis of SiC powders involves many steps and is an energy-intensive process [7].
Table 2 The chemical analysis data of SiC powder synthesized at 1300℃ under vacuum condition for 3hrs at various grinding times Particle size (㎛) (Grinding time) SiC Free-Carbon SiO2 Free Si 3.5 (0 h) 96.5 trace 1.19 2.23 1.0 (24 h) 94.6 trace 2.97 2.34 0.5 (120 h) 85.7 trace 5.94 8.12 Summary Characterization of two types (high and low purity) of silicon kerf generated from solar cell manufacturing process was carried out.
XRD data confirms that the crystalline phases of two samples are different.
Particle size analysis data of high purity silicon kerf in Fig.5 shows uniform particle size distribution.
Conventional carbothermal reduction of SiO2 for the synthesis of SiC powders involves many steps and is an energy-intensive process [7].
Table 2 The chemical analysis data of SiC powder synthesized at 1300℃ under vacuum condition for 3hrs at various grinding times Particle size (㎛) (Grinding time) SiC Free-Carbon SiO2 Free Si 3.5 (0 h) 96.5 trace 1.19 2.23 1.0 (24 h) 94.6 trace 2.97 2.34 0.5 (120 h) 85.7 trace 5.94 8.12 Summary Characterization of two types (high and low purity) of silicon kerf generated from solar cell manufacturing process was carried out.
Online since: November 2011
Authors: Paweł Rzucidło, Peter Chudy
The frame is sliding from the beginning to the end of the data set with a constant pace.
The presented detection algorithms were applied to the data recorded with a 0.01s sampling time.
During the initiation, the FFT window is placed at the data start.
Next, the FFT analysis of the input and output data is performed.
The communication was established via a CAN data bus.
The presented detection algorithms were applied to the data recorded with a 0.01s sampling time.
During the initiation, the FFT window is placed at the data start.
Next, the FFT analysis of the input and output data is performed.
The communication was established via a CAN data bus.
Online since: January 2018
Authors: Makoto Miyazaki, Keisuke Yokoya, Yusuke Tojo
This paper deals with the influence of axial length and reinforcing rib on dynamic axially compressed aluminum polygonal tube in order to obtain the basic data of buckling and impact resistance.
There are a lot of interests in an aluminum tube as a frame timber having the function of high strength and weight reduction of automobile bodies [6].
There are a lot of interests in an aluminum tube as a frame timber having the function of high strength and weight reduction of automobile bodies [6].
Online since: October 2012
Authors: W.Y.H. Liew, B. Asfana, S.A. Gure, Yeakub Ali Mohammad
An empirical model is developed by the analysis of variance (ANOVA) of experimental data.
Introduction Recently, there has been an increasing demand for micromachining due to the trend of miniaturization (reduction in size and weight) of technological devices for higher level of performance with minimum energy.
Introduction Recently, there has been an increasing demand for micromachining due to the trend of miniaturization (reduction in size and weight) of technological devices for higher level of performance with minimum energy.
Online since: May 2012
Authors: Shong Loong Chen, Chun Fu Lin
So, if we combine the two methods using monitored data in the field, we can analyze slope stability clearly.
The parameters of reduced shear strength are calculated with Eq. (1) below: [5, 6] (1) Where RF is the reduction coefficient for shear strength, and are the effective cohesion and internal angle of friction, respectively, of the soil, and and are the effective cohesion and internal angle of friction, respectively, of the soil at failure.
The parameters of reduced shear strength are calculated with Eq. (1) below: [5, 6] (1) Where RF is the reduction coefficient for shear strength, and are the effective cohesion and internal angle of friction, respectively, of the soil, and and are the effective cohesion and internal angle of friction, respectively, of the soil at failure.
Online since: February 2014
Authors: Yueh Ju Lin, Chi Chen Wang
Introduction
Before fuzzifing any time series data, it is necessary to determine the universe of discourse, to define the fuzzy set and to partition the set first.
Defining the fuzzy sets and fuzzifying the data.
From the matrix model (8), the fuzzified variation can be described as following: (9) Data information The data are obtained from AREMOS economic database, which includes the value of Taiwan exports and the foreign exchange spot rate from January 1995 to March 2002, with a total of 87 data points.
Due to possible influence of information period on forecasting power, information period length is controlled for and separated into three sample sets, a short period of 27 data points (01/2000 to 03/2002), a middle term of 51 data points (01/1998 to 03/2002) and a long period of 87 data points (01/1995 to 03/2002).
At different length periods, how prior information, interval partition, increment data and setting of fuzzy model affect model forecasting power are discussed.
Defining the fuzzy sets and fuzzifying the data.
From the matrix model (8), the fuzzified variation can be described as following: (9) Data information The data are obtained from AREMOS economic database, which includes the value of Taiwan exports and the foreign exchange spot rate from January 1995 to March 2002, with a total of 87 data points.
Due to possible influence of information period on forecasting power, information period length is controlled for and separated into three sample sets, a short period of 27 data points (01/2000 to 03/2002), a middle term of 51 data points (01/1998 to 03/2002) and a long period of 87 data points (01/1995 to 03/2002).
At different length periods, how prior information, interval partition, increment data and setting of fuzzy model affect model forecasting power are discussed.
Online since: May 2021
Authors: Siti Hasnawati Jamal, Keat Khim Ong, Wan Md Zin Wan Yunus, Nursyafiqah Jori Roslan
Analysis of Fourier transform infrared (FTIR) displayed the reduction of hydroxyl group in nitrocellulose proving that several hydroxyl group in cellulose was successfully replaced by nitryl group.
This is the preliminary studies where the data will be used for further investigations using an optimization tool, Response Surface Method (RSM) in finding optimum condition in order to enhance NC production for propellant uses.
Analysis of FTIR also displayed the reduction of hydroxyl group in nitrocellulose proving that several hydroxyl group in cellulose was successfully replaced by nitryl group.
This is the preliminary studies where the data will be used for further investigations using an optimization tool, Response Surface Method (RSM) in finding optimum condition in order to enhance NC production for propellant uses.
Analysis of FTIR also displayed the reduction of hydroxyl group in nitrocellulose proving that several hydroxyl group in cellulose was successfully replaced by nitryl group.