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Online since: August 2014
Authors: Yu Liu, Chang Jie Zhang
Finally, a test has been made with real data from an oilfield.
In section 4, we discuss our experiments with real data.
PCA was a good tool for dimensionality reduction and relationship decoupling.
We should map the source data set into a new one, in which sensors can be grouped rather than data features.
In our paper we will use the covariance matrix of S as the new data set.
Online since: April 2012
Authors: Yong Fei Zhu, Yu Xin Liu, Li Fang Liang, Li Bei Yao, Fang Yang, Wei Su, Shu Juan Yu
Finally, the silver circuit patterns with the lines of 200 µm width were formed on the PI substrate surface due to the reduction reaction of dimethylamine borane (DMAB).
The reduction of silver ions is initiated by the electrons migration from DMAB to silver ions, and silver nanoparticles subsequently form, according to the following reactions.
It can be concluded, base on FTIR data, the surface molecules of the PI film are cleaved to form metal salts of carboxylic acid groups and amide bonds by KOH, and are consequently transformed to carboxylic acid groups by DMAB.
After DMAB reduction, numerous silver nanoparticles assemble on the surface of PI film.
Combined the contact angle data with the results of ATR FT-IR spectra, we can deduce that the difference in contact angle between the PI films before and after DMAB treatment is attributed to the difference in intrinsic wettability between the two ionizable species [30].
Online since: November 2015
Authors: Antonio Ballester, J.A. Muñoz, M. Luisa Blázquez, F. González, Ernesto González
In the development of new processes to use the potential of iron reducing bacteria, Acidiphilium cryptum, the main bacterium involved in the reduction of Fe(III) compounds in acidic environments, could play an important biohydrometallurgical role.
Although iron oxide reduction can be performed by neutrophiles (e.g.
Comparing the evolution of total dissolved iron for inoculated vials and abiotic controls containing hematite and goethite, it is evident that A. cryptum promoted their dissolution due to the reductive environment generated inside the vials (data not shown).
Secondly, although based on thermodynamics any iron-reducing microorganism can also reduce Mn(IV) [10], directly or indirectly, via Fe(III) reduction (i.e. using dissolved iron as a redox mediator) [11], to our knowledge, this is the first time that manganese reduction (and bioleaching) by Acidiphilium cryptum is reported.
Although Figure 2 shows that oxalate caused the chemical dissolution of both solids due to its chelating and reducing nature (data not shown) [1], it had a marked stimulating effect on the microbial reductive dissolution, triplicating the concentration of dissolved iron obtained in its absence (Figure 1).
Online since: September 2018
Authors: Dmitry R. Mailyan, Liya D. Mailyan
Now we determine the reduction degree of the reinforcement consumption taking the precompression into account.
The data given above prove that the elements with mixed reinforcement can be more economical than with precompression of the whole longitudinal reinforcement only if there is a breakage of non-stressed reinforcement, which causes no technological difficulties.
For elements with length reduction of non-stressed rods, compared with length reduction of precompressed reinforcement, the condition of economic advisability of mixed reinforcement will be of the following type: (17) where and – the mass of longitudinal reinforcement, respectively, which is non-stressed in the elements without prestressed reinforcement and previously being precompressed in the elements without non-stressed reinforcement; и – the mass of longitudinal reinforcement in the elements with mixed reinforcement, respectively, non-stressed and precompressed.
Summary Thus, the analysis shows that the reduction of total steel consumption and money spendings on the elements with mixed reinforcement can be achieved only at breakage not less than 50% of the whole non-stressed reinforcement length.
Wherein the increase in relative content in the cross-section of non-stressed reinforcement (at ) leads to the reduction of the ratio , of total steel consumption and reinforcement costs.
Online since: November 2011
Authors: Jun Zhang
The data shown in Table 1 suggest that the BET surface area, the micro-pore and the meso-pore volumes were significantly affected by the presence of Fe3O4.
Thermal investigations of direct iron ore reduction with coal.
Reduction kinetics, magnetic behavior and morphological changes during reduction of magnetite single crystal.
Kinetics of reduction of iron oxides by H2 Part II.
Low temperature reduction of magnetite.
Online since: September 2013
Authors: Ying Huang, Zu Lian Zhang
The limit equilibrium analysis, the strength reduction finite element method, the saturated/unsaturated seepage coupling and so on were applied to analyze the reservoir bank stability.
The numerical simulation analysis methods The strength reduction finite element method The numerical simulation analysis methods are mainly represented by the finite element method.Although the stability safety coefficients of thereservoirbank cannot be directly obtained by conventional finite element numerical analysis methods ,but the strength reduction method provided an effective way.The basic principle of the strength reduction method is that the material strength parameter values are divided by a reduction factor at the same time to obtain a new set of values .Then trial will be carried out as a new material parameter.Byunceasingly increasing the reduction coefficient RFand using the finite element method to calculate the stress and the strain of the reservoir bank,the reduction factor is the stability safety coefficient until the reservoir bank reaches the critical state oflimit equilibrium.Huafeng Deng[7] et al. applied the strength reduction finite element method to analyze one
The analysis of the reservoir bank stability is carried out combining on the strength reduction finite element method.This method is more close to the objective reality to the reservoir bank instability state and can reflect the influence of the reservoir water level influence on the reservoir bank stability.In considering the coupling effect of the seepage and the deformation of the reservoir bank,Guiyun Zhou [8] et al. analyzed the reservoir bank stability under the action of the saturated / unsaturated seepage by the strength reduction method.They carried out the specific calculation and analysis through some example.
According to the characters of the reservoir operation, the rule of wave action and the geological characteristics of the rock and soil of thereservoirbank , the mathematical model based on experience is established by the hydraulics, sediment dynamics theory and the actual observation data.
Online since: February 2012
Authors: Yi Cheng Huang, Fong You Lee
An analytical solution method is applied to satisfy the requirements for vibration reduction.
After the crankshaft counterweight is machined and installed, the new crankshaft is able to reduce compressor vibrations from 32 mm/s down to 15.8 mm/s and noise reduction of 3 dB.
Experiments and Results Comparison The purpose of crankshaft modal testing is to measure the frequency response data of the system and to establish a model for mathematical and physical properties, which can then be used as a reference for crankshaft balance weight design.
After the modal testing experiment, we compared the natural frequency obtained from the experiment with the results from finite element analysis to verify that the processed data was based on spectrum analyzer measurements.
Comparison of data obtained from the experiment and simulation using finite element analysis is listed in Table 2, which reveals that the natural frequency obtained from the modal testing experiment and the finite element simulation had an error rate of less than 6 %.
Online since: July 2011
Authors: Yu Qin Zhu, Dan Li Zhou
In the work, nano-sized MoO3 and unsupported MoS2 hydro desulfurization catalysts were synthesized using a novel hydrothermal reduction method.
Experimental materials and preparation methods Experimental materials By analysis and comparison,the hydrothermal reduction is used to prepare MoO3, the former body of MoS2 catalyst, and the MoS2 catalyst is synthesized by the hydrothermal deoxidization which is compared with the method of high temperature hydrogen sulphurization.
Materials of hydrothermal reduction to prepare MoO3(MoO3-Hy), of high temperature hydrogen sulphurization to produce MoS2(MoS2-D),and of hydrothermal deoxidization to prepare MoS2 have been shown in table1, table2, and table 3 respectively.
Table1 Materials of hydrothermal reduction using for the preparation of MoO3 Materials Specification hydrochloric acid 37% sodium molybdate ≥99.5% Table2 Materials of hydrogen sulphurization using for the preparation of MoS2 Materials Specification hydrochloric acid 37% sodium hydroxide 98% hydrogen 99.99% sodium sulfide nonahydrate ≥ 98% nitrogen 99.99% sodium molybdate ≥99.5% Table3 Materials of hydrothermal deoxidization using for the preparation of MoS2 Materials Specification hydrochloric acid 37% nitrogen 99.99% alcohol 95% MoO3 ≥99.5% sodium sulfide nonahydrate ≥98% Preparation methods Hydrothermal reduction for the preparation of MoO3 :The mixture of sodium molybdate and hydrochloric acid in certain proportion was put into the inner of reactor and heated from the ambient temperature at a certain speed to 150˚C.
Handbook of thermochemical data for compounds & aqueous species.
Online since: December 2012
Authors: Ting Niu, Xia Li, Yan Fei Zhou, Zhao Zhao
Land Resources Information Acquisition Based on Multi-temporal TM Images Ting Niu12a, Xia Li1b* Yan fei Zhou1c Zhao zhao13d 1.Department of Grass and Environment Xinjiang Agricultural University; Urumqi, China 2.Survey and design institute of water conservancy, hydroelectric and Xinjiang; Urumqi, China 3 Xi'an Municipal Research Institute of Environmental Protection e-mail: a xjniuting@163.com; b xjlx782@126.com; c 1414112483@qq.com d 277062273@qq.com Keywords: Land Resources Information Acquisition; Multi-temporal; the lower reaches of the Tarim Abstract: Selected the lower Tarim River in 2000 and 2010 TM / ETM data source, the use of human - machine interaction visual interpretation of data obtained by two interpretation map, interpret the results based on two data LUCC trends in variation analysis, the results show that: in the past 10 years, the Tarim River increased 28735 ha cultivated land (hm2), the natural increase of 25846 hectares of vegetation (hm2).
Fig. 1 Distribution map of selected four transactions and water conveyance channel in the lower reaches of the Tarim River Materials:This paper selects the data mainly includes: remote sensing data, the geographic data and field survey data.
Remote sensing data: 2000ETM, 2010 TM image data; The geographic data: vectors of administrative boundaries, vectors of rivers, 2006 present land use map; Field investigation data: 25 points sampling data, including the type of land, vegetation types, vegetation coverage etc.
Through the interpretation of remote sensing and field survey, we update land use data to the year 2009; then, in reference to the remote sensing interpretation result of 2009, we interoperated, two other remote sensing data of 2000 and 2010, and made land use topical sketches; the third step: through on-site verification result, we eliminated difficult areas, modified mistake area, updated interpretation sketch, made land use map; the fourth steps: with the aid of GIS platform, we analyzed evolution of land use, researched the characteristics of landscape ecology use change.
Literature References (1) The results show that the two remote sensing data interpretation in the study area for the past 10 years cultivated area increased 28735 (hm2), the natural vegetation to increase to 25 846 (hm2), arable land to increase the focus on the river on both sides of unused land.
Online since: July 2011
Authors: Wen Zhong Chen, Hui Liu
Preparing sialon tailings transition to inner lining material based on carbon-thermal reduction and nitridation (CRN).
According to the comparison of data measured and simulation results, the temperatures are similar.
The simulation results are 200K higher than the measured data.
Compared with the actual mechanical data given by manufacturers, the thermal stress field of the new refractory under theoretical conditions of is obtained.
The data in theoretical conditions is about 15% of the maximum stress field of the material.
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