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Online since: December 2013
Authors: Ondrej Stevka, Vladimir Dekýš, Alzbeta Sapietova
In this paper is presented using FRF functions as a useful tool for the interpretation of measured data. 1.
Then the sub-tasks are addressed: reduction of potential sources of sound and vibration, modification of transfer paths and finally vibration and noise reduction of excitation parts.
Online since: April 2015
Authors: Anton Viktorovich Korchmit, Nikita V. Martyushev
The data on the influence of rotational velocity of a casting mould and the temperature of melt pouring on the structure and mechanical properties are presented in the article.
With the increase in the temperature of the mould (fig. 2 a, b) grinding of the lead constituent and reduction of its amount take place.
This can be accounted for the reduction of the average size of the lead grain and eutectoid grain during overheating.
Online since: March 2007
Authors: Edith Mäder, Thilo Herrmannsdörfer, J. Liu, Shang Lin Gao, A.D. Bianchi, S. Zherlitsyn, B.S.A. Zvyagin, J. Wosnitza
For the extracted fibre, the plasma treatments cause reduction in both interfacial adhesion and the tensile strength, which is sensitive to plasma treatment conditions as revealed by a bimodal Weibull statistical distribution analysis.
For the extracted fibre systems, unexpectedly, the plasma treatments with either O2 or NH3 gas result in remarkable reduction of interfacial adhesion strength.
It is worth mentioning that the various acidic treatments in general results in much remarkable reduction in strength of PBO (not shown here).
The experimental data in Fig. 3 shows qualitative agreement between Gic, γf and D values depending on the fibre/resin systems.
Online since: May 2014
Authors: Ai Cun Wen, Ji Dong Zhang, Heng Jia Zhang
Therefore, low water deficit RDI at seedling while full irrigation during flowering to late fruiting could be used to effectively reduce irrigation water application and improve IWUE of processing tomato without causing economic benefit reduction in arid areas.
Introduction Water application was greatly reduced and crop irrigation water use efficiency (IWUE) was significantly improved under regulated deficit irrigation (RDI) in an arid environment [1,2,3], mainly due to the significant water-saving and minor crop yield reduction effect of reasonable RDI [4,5].
The following data in Table 2 were means of three replications and statistically analyzed using SPSS18.0 software.
Therefore, low water deficit RDI at seedling while full irrigation during flowering to late fruiting could be used to effectively reduce irrigation water application and improve IWUE of processing tomato without causing economic benefit reduction in arid areas.
Online since: September 2016
Authors: Onnicha Rongviriyapanich, Yasuhiko Sato, Withit Pansuk
In principle, the damage characteristics may vary with several factors such as the external thermal loading and the mineral structure of raw materials made mortar [12-13], but very few data are available to discuss the significance of these parameters.
The reduction in flexural strength was clearly observed in both cases.
(a) JP ISO (b) TH ISO Fig. 5 In-depth mesoscopic flexural strength In addition to the flexural strength, the modulus of elasticity could be also determined from the experimental data of flexural test.
The result shows that the reduction in modulus of elasticity was clearly indicated.
This can cause the reduction in mechanical properties of mortar.
Online since: June 2017
Authors: Yong Qing Zhao, Xin Fang Bai, B. Li
After annealing at single-phase β region (50°C above the β transus temperature) for 1 h, the alloy was hot rolled from Φ30 mm to Φ8 mm in diameter with three passes (the reduction achieved per pass ≤ 70%) being performed without reheating.
The experimental data were processed to obtain the orientation distribution functions (ODFs).
In most cases, the ODFs data identifies two prominent orientations which are termed as α and γ fibres in bcc metals and alloys [22, 23], and shown in Fig. 5 for all the samples.
As the deformation temperature increases from 750°C to 850°C at the condition of 50% compression reduction, the major texture component are {111}<110> and {111}<112>.
The present results differ from the texture development feature of TLM titanium alloy during cold compressing at 50% compression reduction observed by our research in past [24].
Online since: January 2010
Authors: Paulo Roberto Cetlin, Maria Teresa Paulino Aguilar, Elaine Carballo Siqueira Corrêa
On the other hand, although the stress-strain curves superposition technique represents an easier method in terms of experiments and data treatment, supposes the non occurrence of energy loss in the process and work hardening independence on the strain path.
In this case, sectioned stepped cylindrical bars were employed in the study, in order to allow the calculation of the straining distribution along the cross section of the drawn metal considering both reductions of area evaluated in the analysis.
Six operation conditions were considered in the analysis, involving three die semi-angle α and two reductions of area r, whose details are given in Table 1, as well as the external deformation ε and the parameter ∆ related to them.
Concerning the images displayed in figure 2, the occurrence of increasing changes or distortion of the grid lines as the area reduction and the die semi-angle increase is clearly verified.
For both methods, despite the dispersion of the data and the differences in terms of values, increasing relationships between φ and ∆ are clearly observed.
Online since: September 2013
Authors: Claudio Chesi, Chiara Tardini, Maria A. Parisi
The criterion followed is typical of vulnerability studies and comprises a visual exam of the structure according to a codified inspection procedure, during which different types of data related to the roof system are collected, and subsequently the evaluation of a series of characteristics of the structural system that determine or influence its capability of developing a suitable seismic response.
The procedure for seismic vulnerability assessment defined for the case of timber roof structures [1, 2, 3], may be summarized in the two following points, Part 1) The structure is inspected according to a standardized sequence and following given guidelines; at this time, data regarding the configuration of the structure, the geometry of its members, its joints, and its construction details, the materials, and the state of conservation are collected.
Classification of conceptual design A) Effect of interconnection B) Effect of dimensions and type Structural scheme Section [cm ´ cm] Span [m] Trusses in orthogonal directions A 6 9 12 18 24 Parallel trusses with transversal bracing A – B 15 ´ 15 A B C Parallel trusses with at least 2 purlins per pent A – B 20 ´ 20 A B C C Parallel trusses with 1 purlin per pent B – C 25 ´ 25 A B B Couple roof (no truss) C – D 30 ´ 30 A A Criteria for evaluating different types of carpentry joints must focus on the capability to maintain connection during load inversion and consequent reduction or loss of contact pressure, and on the identification and exclusion of possible brittle failure modes.
Elimination of initial conceptual errors, like the presence of unrestrained thrusts, not uncommon in old structures built sometimes without a sound conceptual design, is a necessary operation also in terms of vulnerability reduction.
Strengthening operations to improve the response to lateral loads are less frequently found and are, in general, positive on vulnerability reduction, in structures often lacking sufficient specific capability.
Online since: May 2020
Authors: Aleksander A. Lykasov, Grigoriy M. Ryss, Dmitrij A. Ponomarev
Extraction of iron from copper-smelting slag can be carried out by reduction with carbon [11-14].
According to the data given in [24], the iron associated in the solid slag with the silica in the fayalite 2FeO∙SiO2 in the process of oxidizing roasting of the slag in the result of the disproportionation of fayalite stands out as a separate phase of Fe3O4, which interacts with CaCl2 with the formation of ferric chloride FeCl2, limiting the interaction of the copper compounds with the chlorinator.
It follows from these data that the rate of removing copper from the slag is most probably determined by the diffusion of copper through the scale layer to the surface of the chlorinator.
Borodin, Reduction of the iron from the slag of sulphuric cupreous melting by the products of gasification of carbon, Izvestiya.
Gumowska, Hydrometallurgical recovery of copper and cobalt from reduction-roasted copper converter slag, Minerals Engineering. 22(1) (2009) 88–95
Online since: May 2019
Authors: Li Fang Zhang, Ying Wang, Ying Ge Lei, Yun Chang
Three load conditions are considered by adding two lanes with reduction coefficient 1 or three lanes with reduction coefficient 0.78 or four lanes with reduction coefficient 0.67.
The deviations between two series data are mostly less than 2%.
The difference among the five series data is very small.
Research on Transverse Load Distribution and Lateral Reduction Coefficient in Widening of Highway Girder Bridges.
Effects of traffic vibration on curing concrete stitch: Part II-cracking, debonding and strength reduction.
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