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Online since: February 2013
Authors: Dong Min Won, Kyong Gon Kim, Gwang Hee Kim, Yoon Seok Shin
For public buildings that consume comparatively more energy, a new and renewable energy system that can be operated using repeatedly renewable energy at a relatively reasonable cost will lead to reductions in energy consumption.
For a comparative economic analysis, data on the actual utilization of the newly introduced system was collected.
If the reduction in the cost of cooling is assumed to be about 30%, it is expected that the annual energy consumption would be reduced by more than KRW 61,000,000.
In the investment recovery analysis, only the cost saved was considered, and the substitution effect of the import of crude oil caused by a reduction in the consumption of fossil fuel was not included.
Moreover, by comparing the heating cost of the SCW system with the heating cost of general boilers, a reduction in energy cost was found.
Online since: September 2013
Authors: Jun Luo, Lian Xiong, Hai Jun Guo, Shang Gui Li, Hai Rong Zhang, Cai Rong Luo, Xin De Chen
Stone et al. [5] first investigated precursor characterization, conversion to active catalyst and activity data for a full range of Cu/Zn ratios in both unsupported and alumina-supported Cu-ZnO catalysts for the RWGS reaction.
In order to demonstrate the structure change of K/Cu-Zn catalyst during reduction and reaction under the optimal conditions, the XRD was used to characterize these catalysts (Fig.4).
Reduction conditions: 673 K, 1.5 MPa and 1200 h-1 under pure hydrogen atmosphere.
After reduction by pure hydrogen, the diffraction peaks of reduced catalyst become sharper, indicating that the crystallinity of catalyst is effectively improved.
It also can be seen that the diffraction peaks of ZnO are still present and new diffraction peaks at 2θ values of 42.8o, 49.8o and 73.2o which are belonged to the reduction of CuO to Cu are showed.
Online since: February 2021
Authors: Muhammad Arif, Budisantoso Wirjodirjo, Endah Angreni
According to previous identification from this paper as shown in Figure 1 where the CLD of minapolitan area development application is a conceptual model, thus the causal relationship among variables were formulated in dynamic system model structure which covers: stock as counted variables, flows as determinant variables, and converters as data input that compiled into one flow system.
Effective land expansion and land reduction mechanisms can increase the carrying capacity of land and spatial structure in the region.
In the land submodel, there are variable area of ​​the pond as a level and the rate of expansion and reduction of land as a rate (inflow and outflow) that affect the level.
In addition, the rate of expansion and reduction of land is influenced by the flow of information as a converter.
While the rate of land reduction is influenced by the conversion of pond areas, such as the expansion of agricultural areas and the conversion of pond areas into settlements.
Online since: April 2019
Authors: Aleksandrs Korjakins, Girts Bumanis, Jurijs Ozolins, Andrejs Shishkin, Kristine Irtiseva
Reduction of CCHS open porosity due to higher content of WG (10 %) leads to lower absorption of cement paste.
According to all abovementioned obtained data of the open porosity and water uptake, characteristic macroscopic void volume is sufficient for water storage by capillary forces.
After analysing of open porosity data we can conclude that FGW-B, FGG-B and KER-B samples have higher capacity for water uptake both in absolute values and relative values than any of CCHS containing samples (Fig. 3).
Data on compressive strength, specific compressive strength and apparent density are presented in Fig. 4.
This conclusion is supported by data summarized in Fig. 4.
Online since: June 2014
Authors: Zhi Jian Peng, Lin Feng Lan, Lei Wang, Jun Biao Peng, Ju Sheng Ma, Hong Long Ning
Based on the data of thermodynamics and kinetics, the Gibbs free energies of the main interface reactions in the real brazing system condition were calculated.
At 1155K, Ti would change from β phase to α phase; Al would change from liquid to solid at 932 K, so Ti and Al could be described by Eq.9 and Eq.10: (9) (10) The standard enthalpy and entropy changes of Al2O3 reduction reaction could be described by Eq. 11 and 12: (11) (12) Table 1 listed the reference data of thermodynamic [12-14].
If we introduced these data to Eq.3 and 4, we could get the reaction equilibrium constant of TiO (Kα) [15].
Based on the thermo-chemical data of reactant and resultant, the resultant enthalpy was calculated, and the entropy change after the brazing condition correction items was introduced.
Ye, Practical handbook of thermodynamic data of inorganic, Beijing, Metallurgical Industry Press (1981)
Online since: January 2014
Authors: Xing Liu, Xian Yan Chen, Yuan Lin, Long Fang Ye, Fen Xiao, Qing Huo Liu
By using frequency-sweep and data processing techniques, the multiplicity of roots is eliminated.
The measurement of the reflection and transmission response of transmission line is conducted by the VNA.The complex permittivity and the permeability of the sample are then derived from the scattering parameters using a computer-based reduction algorithm.
Results and discussions Figure3 shows the curves and the data of the electromagnetic parameters of air versus frequency.As the relative permittivity and permeability of air are both within 0.95~1.04,it can be seen that the measurement resultsare consistent with the real value.
Figure4 illustrates the frequency-sweep test chart for PTFE.As shown in the data graph,,, , are within 1.94~2.11,0.02~0.12,0.97~1.05,-0.05~0.04, respectively.
Online since: December 2014
Authors: Di Guan, Feng Ping Yang, Xian Min Chen
Based on the energy theory and material fatigue test data, the plastic strain threshold for damage initiation was modified for HCF and LCF respectively.
A damage mechanics-finite element full-couple method was adopted to simulate the process of fatigue damage evolution, incorporating elastic modulus reduction due to fatigue damage.
The plastic strain threshold for damage initiation(pD) for HCF and LCF were modified respectively based on the energy theory and test data.
pD=N0﹒△p=N0﹒2εp (6) With assumption that only tensile stress contributes to the microcrack initiation, pD can be written as      (7) Compared with Eq.2, Eq.7 is more close to the truth in the following two aspects. 1) While the material is under uniaxial static tensile load, i.e. σeq,max=σu, =σy, then and pD obtained form Eq.7 equals εpd, which is consistent with the definition by Lemaitre. 2) The value of pD obtained from Eq.7 is smaller than that from Eq.2 and more close to the test data in LCF regime.
Online since: October 2012
Authors: Shi Qing Wang, Fei Xia Song
With the collection of large high-dimensional data in scientific investigation, the related covariance matrix becomes complicated to deal with.
A number of statistical methods, including principal components analysis for dimensional reduction, linear and quadratic discriminant analysis for classification, setting confidence intervals on linear functions, establishing independence relations between components, require the estimation of covariance matrices.
However, with the collection of large high-dimensional data in scientific investigations, data sets that don not fit the classical multivariate theory have recently become very common.
Online since: January 2012
Authors: Zhen Duo Cui, Xian Jin Yang, Qiang Wei, Sheng Li Zhu, Ye Han
Quantitative results (kinetics curves) are obtained by processing the potentiodynamic scanning data with the method in question.
Data pre-processing.
Local binomial regression was performed and original data were replaced by the fitting values during smoothing.
Data were pre-processed before calculation by correcting and smoothing (Fig. 5).
A coverage parameter qp can be define as the coverage value at Ea=Ep, a, which can be acquired in the final data sequences of processing.
Online since: May 2015
Authors: Cheng Hsien Lee, Yun Yun Lu, Guan Huei Wu, Yao Yi Wang, Jui Feng Yeh
"Semantic Retrieval" is determining the specific vocabulary, topic or keyword, it transforms the original data to kernel data further correspond re-late topics, for example people, event, time, location, object.
When the action begins printing, which have three processes is started, including Windows Application and Printing Process as well as Data Extracting.
In data extraction, we can focus on the printing process and after printing the print buffers Spool Directory temporary files in two parts.
Therefore, this study is priority to extract it from the printing process, this process is faster than data access in the print buffers, reliability is higher.
After data ex-traction can be directly for processing or temporary storage to another file directory.
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