Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: May 2011
Authors: Da Li Yao, Wei Qing Zhu, Fang Yu, Jin Qing Jia
Accelerated pitting corrosion tests have been performed to obtain spatial and temporal maximum pit-depth data for prestressing wires [9].
Experimental Program This section describes the main characteristics of the tested beams, the properties the constituent materials, the experimental loading apparatus, the instrumentation and the data acquisition systems.
Experimental data, such as load, displacement, concrete strain and steel (including longitudinal steel and steel strands) strain were simultaneously collected also by MTS.
All three Beams showed different reduction in their fatigue life due to their corrosion rate.
(2) Fatigue life of beam has prominent reduction with the increase of corrosion level
Online since: February 2015
Authors: Alysson Klebis Arantes, Sônia Maria Esposte Sturaro, Andrea Cressoni de Conti, Cláudio de Conti
DATA FOR PARALLEL COMPRESSION TEST TO SPECIMENS DRIED IN KILN DRYING PROCESS Drying Method Species Diameter [cm] Breaking Strength [Mpa] Kiln drying Phyllostachys pubescens 7,275 31,38153 Bambusa vulgaris var.vittata 6,70 43,87694 Dendrocalamus giganteus 8,5625 40,69846 TABLE 2.
DATA FOR PARALLEL COMPRESSION TEST TO SPECIMENS DRIED IN FIRE DRYING PROCESS Drying Method Species Diameter [cm] Breaking Strength [Mpa] Fire drying Phyllostachys pubescens 7,2125 25,70809 Bambusa vulgaris var. vittata 5,3625 24,08426 Dendrocalamus giganteus 8,2875 22,29831 TABLE 3.
DATA FOR PARALLEL COMPRESSION TEST TO SPECIMENS DRIED IN OUTDOOR DRYING PROCESS Drying Method Species Diameter [cm] Breaking Strength [Mpa] Outdoor drying Phyllostachys pubescens 8,475 28,00153 Bambusa vulgaris var. vittata 6,5125 23,36712 Dendrocalamus giganteus 9,1125 33,17296 From an analysis of Tables 1, 2 and 3 we found kiln drying method offers the highest strength to mechanical test of parallel compresion for all three species analyzed when compared the other two drying methods.
It was also found there was 25.33% reduction compared to the rupture strength in compression parallel when performing the test with kiln dried specimens and outdoor dried specimens, when the comparation happened with the air dried specimens and fire dried specimens this reduction was 14.68% and when we compared the results with this mechanical test to kiln dried specimens and fire dried specimens there was a reduction of 36.98%.Nas Tabelas 4, 5 e 6 apresenta-se os teste de Turkey à 5% para a comparação do ensaio mecânico de resistência a ruptura para cada espécie nos diferentes métodos de secagem.
Online since: June 2017
Authors: I. Alexandrov, V. Goncharov, D. Berchuk, V. Than
Data sheet of the object are typically used in this case, which do not consider the individual characteristics of a particular sample and its current technical condition.
Parametric identification based on experimental data has certain advantages in this regard.
At the stage of the analysis of given data and formulation of the task the signal features and approximate possibilities of the structure (2) can be properly assessed.
The importance of this conclusion consists in achieving not only the reduction of error, but also imparting properties model robustness.
Ø Secondly, the increase of accuracy in one area leads to its reduction on the opposite section.
Online since: August 2015
Authors: Nurzahirah Mohd Zaid, Mohd Khairi Mokhtar, Ismail Musirin, Nur Azzammudin Rahmat
The data from IEEE 33-radial bus system is used in this study.
From the data, it shows that bus 20 is suitable for capacitor placement since it has the highest sensitivity index, ∂P loss / ∂Q.
Table II Data Comparison Before and After Reactive Compensation at Bus No 20 Description Before Q-Compensation After Q-Compensation Bus No 20 20 Total kVar placed (kVar) 0 1548.3 Total Power Loss ( kW) 278.7 243.6 Voltage profile ( p.u ) 0.9538 0.9816 Table II tabulates the comparative studies before and after reactive power compensation at bus 20.
Meanwhile, total power loss after the compensation of reactive power, the loss reduces to 243.6kW, with percentage of loss reduction, 14.41 %.
Kumar, “Power Loss Reduction In Radial Distribution System By Using Plant Growth Simulation Algorithm,” Vol. 2, No. 3, Pp. 19–27, 2012
Online since: October 2006
Authors: Anant K. Agarwal, John W. Palmour, Charles Scozzie, Bruce Geil, Sei Hyung Ryu, Aivars J. Lelis, Bradley Heath, Sumi Krishnaswami
The reduction of the barrier generally occurs under high electric fields and enhanced temperature [1].
The wider bandgap of the 4H-SiC causes a reduction in the barrier at the oxide interface.
Usually high temperature and high electric field (in the oxide) result in the accelerated breakdown of the oxide, thereby enabling us to collect reliability data in a reasonable period of time.
Very little shift in threshold voltage was observed between the pre-stress and post-stress data, indicating excellent stability of the power MOSFETs.
A sample of data up to 625 hours is shown in Figure 8.
Online since: May 2014
Authors: Lian Long Wang, Li Ta, Hui Gao
In order to promote the realization of China's carbon emissions reduction targets, cities are being developed in the region at all levels of reduction strategies That carbon intensity by 40% -45% in 2020 compared to 2005.Low-carbon economy is low power consumption, low emission-based economic model, and its essence is to improve energy efficiency, adopt clean energy structure, the core is the innovative use of technology innovation and energy systems.
Material and treatment Energy and economic data from Qinhuangdao Statistical Yearbook 2002-2011, taking into account changes in the price factor in economic development, business sector output and so are prices in 2000 as the base year for comparable treatment.
The secondary energy coal and CO2 emission factor is the arithmetic mean of the thermoelectric 2001-2009 China coal and thermal CO2 emission factor is based on IEA data Various types of commercial energy consumption data collected by the different types of energy multiplied by the corresponding carbon emission factor can be obtained by carbon emissions, the calculation results are shown in Table 1.
are faced with expansion,At this point you want to do business network planning, good design and construction major marketing venue, warehousing, production and processing buildings and other commercial buildings.The use of hollow insulation bricks, insulation panels, insulation coatings, insulating glass and other building materials to improve thermal efficiency of commercial buildings;In the commercial space to promote the use of natural energy, construction skylights or other natural lighting structure, reasonable design Commercial ventilation and exhaust devices, the use of natural wind adjust the indoor temperature, reducing electricity consumption for lighting and air conditioning.For older commercial buildings, good low-carbon transformation, the old energy-saving building construction potential, Japan and Germany made a more systematic study and practice, low carbon building construction and renovation despite the need for an increase of 5% -10% of the investment, However, 40% reduction
Online since: February 2016
Authors: Evgeny A. Trofimov, A.N. Dildin, I.V. Chumanov
According to the obtained data ground graphite was used as a reducing agent the solid-phase recovery (performed at the temperatures 1000-1300 °C) and it contributed to the increase of iron content and alloying materials in slags.
The chemical composition of the obtained samples, the composition of the metal smelted in the smelting reduction process, and the remaining part of the oxide portion, was investigated by scanning electron microscope JEOL JSM–6460LV, with spectrometer for the qualitative and quantitative microprobe analysis (microroentgens spectral analysis).
Averaged data obtained for the different sections of studied samples was used to determine the composition.
Research results of chemical composition samples of the material and data on the mass fractions obtained slag, suggests the advisability of pre-reduction slag in atmosphere containing carbon monoxide (the operation of solid-phase recovery), followed by liquid-phase recovery for extract consolidated metal phase.
Eremyashev, Solid-phase reduction of waste products in steelmaking, Metallurgist. 56 (2012) 91-96
Online since: May 2012
Authors: Wen Yong Wang, Nan Chen, Xiao Juan Ma
From the monitoring data for recent 5 years, the rainfall PH in the center is 4.5~5.0 and the acid rain frequency is 55%~60%.
Based on formulas (4) and (18), for the agriculture loss calculation by atmospheric contamination, 5 factors must be decided: crop yield reduction rate, crop planting area, crop unit of mu yield and crop price.They shall be explained in the following: (1), from the reference [20], we know that the crops in Leshan City are rice, wheat, soybean and cole.
In 2008 the crop product in the northern urban agglomeration of Leshan City (three districts two counties and one city), the value of is shown in the table.2: (2), check the market price for crops at the end of 2008 (purchasing price) and we get the value of which is shown in the table.2: (3),according to the monitoring data in recent 5 years for SO2 and acid rain in Leshan City, the city is mainly the acid rain polluting area but with other pollutants.
From the supervising data for acid rain in recent 5 years in Leshan City, it is [SO4]2-∕[NO3]- =6.4 in the rainfall, which shows that Leshan City has mainly the acid rain.
Step 2 ,an objective analysis procedure to introduce observational data into the step 1wind field to produce a final wind field.
Online since: October 2013
Authors: Gao Yan Hou, Yong Lv, Hao Huang, Yi Zhu
And the traditional filtering noise reduction method is difficult to extract it out.
So the second noise reduction is necessary after the singular value decomposition.
A basic component to satisfy two conditions: ① In the whole data sequence, the number of extreme value point equals the number of passing zero, most differ are not more than one; ② On at any point, the signal of local maximum and local minimum envelope of the definition of the mean is zero.
SVD-based optimal filtering for noise reduction in dual microphone hearing aids: a real time implementation and perceptual evaluation[J].
The noise reduction method based on singular spectrum and its application in fault diagnosis technology[J].
Online since: April 2019
Authors: Brahim Khaniche
Cyclic voltammetry was performed to obtain the electrochemical potential values for reduction and oxidation of the metal.
SCE is related to the reduction and dissolution of metals.
The peak of copper reduction is observed at -270 mV vs.
A suitable criterion for understanding these two cases of nucleation kinetics consists of indicating the experimental data in a non-dimensional (i / imax)2 vs (t / tmax) diagram and comparing them with the theoretical parts resulting from the equations. (3) and (4).
Since the initial part of the diagram transient (current-time) deviates from the Cottrell equation due to nucleation processes, linearization can be performed only after the reduction reactions are restricted by diffusion dish; That is, beyond the peak stage of the chronoamperograms.
Showing 8821 to 8830 of 40336 items