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Online since: March 2017
Authors: Claudiu Romila, Ruxandra Cozmanciuc
Tight (a-d) and open jointed (e-f) claddings (Author’s collection)
Although open joint ventilated façades are increasingly used for thermo-physical rehabilitation of walls, the choice between tight and open jointed systems is not usually made from energy efficiency reasons, due to lack of relevant existing data.
Data acquisition was done in a steady – state heat transfer, when the temperature variation on the hot plate was less than ± 0,1 ºC.
Corresponding to each considered geometry the recording session lasted 10-12 hours and the obtained data resulted by averaging the values of 3 minutes measurements.
Results and discussions Temperature reduction capacity function of the channel thickness.
The values were computed using measured data of air velocity and air temperatures at the inlet and outlet openings [9].
Data acquisition was done in a steady – state heat transfer, when the temperature variation on the hot plate was less than ± 0,1 ºC.
Corresponding to each considered geometry the recording session lasted 10-12 hours and the obtained data resulted by averaging the values of 3 minutes measurements.
Results and discussions Temperature reduction capacity function of the channel thickness.
The values were computed using measured data of air velocity and air temperatures at the inlet and outlet openings [9].
Online since: December 2012
Authors: Jun Guo Li, Yan Shi, Na Bi
The reduction process has been reported in our previous works [8,9].
To maintain higher reduction rate, the reduction temperature was controlled under higher temperature.
As mentioned preciously, the carbon monoxide possesses lower reduction rate compared with hydrogen, the reduction temperature of SSI reduced by charcoal was much higher.
According to the kinetic experiment datum shown in Fig. 1 and Fig. 2, reaction rate equations of cadmium removal by SSI reduced by charcoal and hydrogen under T1 and T2 temperature could be calculated and illustrated in Table 1.
Chemical reduction of nitrate by nanosized iron: kinetics and pathways.
To maintain higher reduction rate, the reduction temperature was controlled under higher temperature.
As mentioned preciously, the carbon monoxide possesses lower reduction rate compared with hydrogen, the reduction temperature of SSI reduced by charcoal was much higher.
According to the kinetic experiment datum shown in Fig. 1 and Fig. 2, reaction rate equations of cadmium removal by SSI reduced by charcoal and hydrogen under T1 and T2 temperature could be calculated and illustrated in Table 1.
Chemical reduction of nitrate by nanosized iron: kinetics and pathways.
Online since: June 2014
Authors: Xi Long Ding
Preface:
Data is the source of knowledge.
While data mining refers to automatically extracted from the data model.
Including many steps: data mining from large database (or data from other sources); Select the appropriate attributes; Select the appropriate sample strategy; Eliminate data in abnormal data and make up the insufficient part; With proper dimension reduction, transform the data mining process and data model fit or match; Identify whether the resulting knowledge you have will be the result of the information or visualization, and then combined with the existing knowledge.
Statistical analysis of test data, clustering is useful on parameter design and experimental data.
Most of the pattern recognition algorithm and the method of dimension reduction, transform and set has a direct reference significance.
While data mining refers to automatically extracted from the data model.
Including many steps: data mining from large database (or data from other sources); Select the appropriate attributes; Select the appropriate sample strategy; Eliminate data in abnormal data and make up the insufficient part; With proper dimension reduction, transform the data mining process and data model fit or match; Identify whether the resulting knowledge you have will be the result of the information or visualization, and then combined with the existing knowledge.
Statistical analysis of test data, clustering is useful on parameter design and experimental data.
Most of the pattern recognition algorithm and the method of dimension reduction, transform and set has a direct reference significance.
Online since: May 2010
Authors: Jian Lin Qiu, Dan Ji, Xiang Gu, Fen Li, Peng He
Induction
In order to meet our needs of dealing with a great deal of incremental data, the generation and
effectively use of the data mining technology seem so important.
CA algorithm Dimension Reduction.
First International Workshop on Knowledge Discovery and Data Mining, 2008.
A Fuzzy Decision Tree Based Approach to Characterize Medical Data [C].
Combined Optimization Decision Tree Algorithm Suitable for Large Scale Data-base [J].
CA algorithm Dimension Reduction.
First International Workshop on Knowledge Discovery and Data Mining, 2008.
A Fuzzy Decision Tree Based Approach to Characterize Medical Data [C].
Combined Optimization Decision Tree Algorithm Suitable for Large Scale Data-base [J].
Online since: March 2017
Authors: Claudiu Constantin Popa, Vasile Muşat, Nicolae Boţu, Andreea Cristina Bitir
Considering the geotechnical conditions of the analyzed site as input data, in this paper various dimensions and geometric configuration of the columns are evaluated, with specific purpose to determine an optimal solution that meets the technical performances of the project.
One can observe a reduction and a stabilizing trend of the settlements over time, with the introduction of the columns.
This version led to the reduction of the settlement from 10 cm, to 5.7 cm.
As expected, the 1 m diameter and 1.2 m interspacing columns had the best effect, which resulted in a reduction of the settlement from 10 cm to 2.7 cm.
However, both modifying the interspacing by decreasing it, and increasing the diameter of the columns will have, at one point, a negligible effect on settlement reduction.
One can observe a reduction and a stabilizing trend of the settlements over time, with the introduction of the columns.
This version led to the reduction of the settlement from 10 cm, to 5.7 cm.
As expected, the 1 m diameter and 1.2 m interspacing columns had the best effect, which resulted in a reduction of the settlement from 10 cm to 2.7 cm.
However, both modifying the interspacing by decreasing it, and increasing the diameter of the columns will have, at one point, a negligible effect on settlement reduction.
Online since: May 2012
Authors: Xiang Hua Feng, Xiao Rong Zheng, Shi Min Ding
After 30min irradiation, Cr(VI) reduction efficiency reached 100%.
The pH value has great effect on the photochemical reduction efficiency of Cr(VI).
So high acidity is in favor of reduction of Cr(VI) by ferrous ions.
The kinetics data of Cr(VI) photoreduction is shown in Table 1.
The cycle further speeds up the reaction of Cr(VI) reduction.
The pH value has great effect on the photochemical reduction efficiency of Cr(VI).
So high acidity is in favor of reduction of Cr(VI) by ferrous ions.
The kinetics data of Cr(VI) photoreduction is shown in Table 1.
The cycle further speeds up the reaction of Cr(VI) reduction.
Online since: July 2011
Authors: Xu Sheng Yang
The matrix of correlation data is setup, the elements of which are transformed to dimensionless parameters.
Calculation principle of shear strength reduction Shear strength reduction theory.
The grey relational analysis is a part of grey system theory, make up the deficiencies of using regression analysis, variance analysis and principal component analysis etc in mathematical statistic method which requires a great deal of original data, sample to obey, according to the similarity degree of sequence curves’ geometric shape to judge the factors of change (compare factors) and reference factors’ relevance (in relational express), the bigger the correlation is, the stronger the relevance between compared factor and the influencing factor is.
The specific steps first, define the factors influencing slope stability as comparative column Xi : Xi ={X1, X2, ∧ Xm}t, corresponding slope stability coefficient as a reference column Yi : Xi ={Y1, Y2, ∧ Ym}t, Then dimensionless on each sequence Data make sequence comparable, finally obtained grey relational degree with grey relational matrix [4].
Dimensionless of matrix Due to the large difference in the compare column X and the corresponding reference column Y , we can’t compare directly, the original Data is required to be processed to make comparable, that is make the matrix Dimensionless.
Calculation principle of shear strength reduction Shear strength reduction theory.
The grey relational analysis is a part of grey system theory, make up the deficiencies of using regression analysis, variance analysis and principal component analysis etc in mathematical statistic method which requires a great deal of original data, sample to obey, according to the similarity degree of sequence curves’ geometric shape to judge the factors of change (compare factors) and reference factors’ relevance (in relational express), the bigger the correlation is, the stronger the relevance between compared factor and the influencing factor is.
The specific steps first, define the factors influencing slope stability as comparative column Xi : Xi ={X1, X2, ∧ Xm}t, corresponding slope stability coefficient as a reference column Yi : Xi ={Y1, Y2, ∧ Ym}t, Then dimensionless on each sequence Data make sequence comparable, finally obtained grey relational degree with grey relational matrix [4].
Dimensionless of matrix Due to the large difference in the compare column X and the corresponding reference column Y , we can’t compare directly, the original Data is required to be processed to make comparable, that is make the matrix Dimensionless.
Online since: September 2011
Authors: Zong Chang Xu, Xue Qin Tang, Shu Feng Huang
When analyzing complex data, it is rather difficult to reach expected effect by using merely WNN.
In initial sample data, some data is important, some is incomplete.
The selection of UCI data set and experimental design information are as follows Tab 1.
According to the above steps, each data set precedes 10 time experiment; the results take its average.
Table 1 The choice of UCI data set and experimental design information Result comparison is given in Tab 2.
In initial sample data, some data is important, some is incomplete.
The selection of UCI data set and experimental design information are as follows Tab 1.
According to the above steps, each data set precedes 10 time experiment; the results take its average.
Table 1 The choice of UCI data set and experimental design information Result comparison is given in Tab 2.
Online since: December 2024
Authors: Heru Setyawan, Netanya Avabel, Nais Septianingrum, Susanto Susanto, Tantular Nurtono
The development of seawater batteries has constraints on oxygen reduction reactions in the battery discharge process that runs slowly.
Based on research data, N and Fe doped carbon aerogels have better seawater battery performance than N-doped carbon aerogels without Fe.
Slow oxygen reduction reactions must be resolved by using an electrocatalyst to improve the performance of seawater batteries.
The Fe3O4 was used as an electrocatalyst of oxygen reduction reactions [12], [13].
Jiang, “Recent progress of electrocatalysts for oxygen reduction in fuel cells,” J Colloid Interface Sci, vol. 607, pp. 791–815, 2022, doi: 10.1016/j.jcis.2021.09.008
Based on research data, N and Fe doped carbon aerogels have better seawater battery performance than N-doped carbon aerogels without Fe.
Slow oxygen reduction reactions must be resolved by using an electrocatalyst to improve the performance of seawater batteries.
The Fe3O4 was used as an electrocatalyst of oxygen reduction reactions [12], [13].
Jiang, “Recent progress of electrocatalysts for oxygen reduction in fuel cells,” J Colloid Interface Sci, vol. 607, pp. 791–815, 2022, doi: 10.1016/j.jcis.2021.09.008
Online since: April 2024
Authors: Shui Hua Zheng, Yun Qing Gu, Jie Gang Mou, Deng Hao Wu, Ling Zhi Yu, Wen Ting Wang, Zhuo Fan Yin, Zhou Li, Hui Jie Zhou
The data in Table 1 show that Reynolds number Re < 2300 in the main vessels, where all flow is laminar, with only weak turbulence possible at small structures in the wall or at vascular lesions.
As can be seen from the data in the table, when the number of grids reaches 479248, the error between the numerical simulation results and the theoretical value is approximately 3.3%.
Comparison of drag reduction rates of three micro-structure grooves 3.2 Analysis of Model Drag Reduction Effect.
The authors confirm contribution to the paper as follows: study conception and design: Wenting Wang, Yunqing Gu; data collection: Wenting Wang and Lingzhi Yu; analysis and interpretation of results: Lingzhi Yu, Wenting Wang, Zhuofan Yin; draft manuscript preparation: Wenting Wang, Zhou Li; methodology: Denghao Wu, Shuihua Zheng; resources: Jiegang Mou.
F., Bock, J. et al. 3D MR flow analysis in realistic rapid-prototyping model systems of the thoracic aorta: comparison with in vivo data and computational fluid dynamics in identical vessel geometries.
As can be seen from the data in the table, when the number of grids reaches 479248, the error between the numerical simulation results and the theoretical value is approximately 3.3%.
Comparison of drag reduction rates of three micro-structure grooves 3.2 Analysis of Model Drag Reduction Effect.
The authors confirm contribution to the paper as follows: study conception and design: Wenting Wang, Yunqing Gu; data collection: Wenting Wang and Lingzhi Yu; analysis and interpretation of results: Lingzhi Yu, Wenting Wang, Zhuofan Yin; draft manuscript preparation: Wenting Wang, Zhou Li; methodology: Denghao Wu, Shuihua Zheng; resources: Jiegang Mou.
F., Bock, J. et al. 3D MR flow analysis in realistic rapid-prototyping model systems of the thoracic aorta: comparison with in vivo data and computational fluid dynamics in identical vessel geometries.