Search results

Examples of such studies include improvement of the soundproof performance of windows, doors, and other openings in order to reduce the noise produced from external road traffic [1] and reduction of noise among the units between the upper floors and the lower floors [2].
The objective of this research is to evaluate the sound performance of the drainage system developed to reduce the drain noise, as well as that of the existing supply/drainage system currently installed in apartment complexes, and provide preliminary data for the development of bathroom noise reduction technology.
Acknowledgements This research was supported by a grant from the Korea Institute of Construction Technology for the “ A study on noise reduction solution for adjacency household in apartment house” project.

The final conclusion of their study found that a saddle radius which is 1-2 % larger in comparison of the vessel leads to a 50% reduction in the induced stresses and 5-10% overhanging part of the vessel leads to 25–40 % reduction.
This analysis provides a theoretical basis data support for further optimization of saddle support design.
Ongand G.Lu: Stress reduction factor associated with saddle support with extended topplate, Int.

Comparison of Weight By varying all design parameters such as power transmission, gear thickness, number of teeth on pinion and gear module, SFHM performs well and shows a huge reduction in gear drive volume.
For specified spur drive problem, around 36.2% reduction of gear volume in comparison with the trial design method.
In this work, a gear drive design was taken with two different objectives and results were obtained by SFHM shows considerable reduction in gear drive volume in compared with trail method.
[10] Design Data Book, Faculty of Mechanical Engineering, PSG College of Technology, India, 2008.

The results indicated that the temperature obviously influenced the Cr (VI) reduction by m-NZVI.
The results are consistent with previous studies on reduction of Cr (VI) by NZVI [16, 20].
The Cr (VI) removal kinetic data were examined using a pseudo-first-order reaction kinetics expression [16].
The XPS results suggest that the reduction of Cr (VI) to Cr (III) is complete in less than 5 h.
This co-precipitate will eliminated Cr (VI) reduction.

Hence, the European Union has developed Landfill Directive, which requires a reduction in the amount of biodegradable waste going to landfills, an increase in recycling, and improved energy recovery[1].
Table 2 lists experimental parameters, including the material weight, ventilation conditions, ventilation temperature, and ventilation time, etc. 1.4 Test Methods The temperature of the waste pile was continuously monitored by a temperature sensor (Pt100) every 10min; data were recorded in a computer.
Therefore, the reduction of gross energy capacity was insignificant compared with total energy capacity.
Conclusions (1) In the process of high water content MSW bio-drying, the water content and mass of MSW decrease constantly, thus waste reduction was achieved.
(3) Bio-drying obtained a great reduction of water content of MSW by degrading fewer amount of organic matter.

Only e2 - porosity (internal) of grains composing the pellet is taken into consideration, because the reaction of dissociation of carbonates proceeds directly in grains, composing the pellet (10), and as a consequence a strength reduction because of formation of weak oxide СаО (MgO) [2].
At high temperatures a process of glass phase formation can be observed (11), which also secures reduction of ultimate strength [2,3]
Optimal control of target processes in the layer taking into account received data and on the basis of the represented mathematical model will make it possible to maximally reduce the number of returns and to provide resource-saving and energy-saving conditions for functioning of firing assemblies.
Kazak Computer-aided simulation of heat- and mass-transfer processes in an ore-reduction electrothermal reactor, Theoretical Foundations of Chemical Engineering, 49(5) (2015) 606-611
Chen, Preparation of prereduced pellets by pyrite cinder containing nonferrous metals with high temperature chloridizing-reduction roasting technology, ISIJ International, 54(10) (2014) 2162-2168

All the data were interfaced with computer using software.
At full load the reduction in emission was observed 15% for biodiesel with BFE while comparing with biodiesel.
The reduction in HC is mainly due to improved combustion of biodiesel blends due to excess oxygen atom in biodiesel.
The reason for NO reduction is due to shorter ignition delay, and reduced temperature of uncontrolled combustion.
But the BFE would give minimum reduction in smoke emission.

Promoting a comprehensive view of energy consumption involves not only its reduction, but also how this can be achieved ecologically and economically, for example by increasing the involvement of recycled materials in construction or materials with minimal environmental footprint [2-4].
The selected criteria are: ü initial investment costs, in CZK, ü payback period, in years, ü reduction of heating and cooling costs, in %, ü total costs of the revitalization life, in CZK, ü environmental impact – CO2, in t, ü standard hours necessary for the revitalization, dimensionless [9].
In this case, the calculated and obtained input data were evaluated using a multi-criteria evaluation of Fuzzy Logic.
It also leads to the reduction in the CO2 greenhouse gas emissions.
Conclusions Sustainable construction is dependent on the reduction of the energy performance of buildings and the related financial costs of operation, as well as on the environmental impact (emissions and waste), which can be achieved by appropriate structural modifications.

Considering a FE model subjected to damage at the jth element, the stiffness matrix [ ]jk of the element will experience a change of [ ]jj kD∆ , where jD∆− is the stiffness reduction factor.
If the linear analytical model were an exact match to the experimental data, the predicted frequency changes given by Eq. 5 would be identical to the measured changes { } [ ]{ }DSC f f ∆ ∆ =
In the subsequent analyses, we only consider the split mode with the lower frequency as it undergoes a greater frequency reduction, and, hence, is more sensitive to damage.
To demonstrate the capability of locating damage by using frequency sensitivities in conjunction with the DLAC approach, the damage was introduced by subjecting a specific element to a homogeneous 25% reduction in the elastic moduli for the shell model.
It is found that the proposed approach gives good predictions of the absolute stiffness reduction with maximum errors less than 8%.

The control system allows the recording and archiving of process data, which are collected (on-line) by a PLC and transferred to a PC via Ethernet interface.
Registration and archiving of (on-line) process data are provided by an adaptation of PC software, and the process data from a PLC to a PC via the Ethernet interface are delivered.
An adaptation of PC software may concern the creation of a dedicated software application for the execution of the following tasks: a preliminary analysis of measurement data, a full process visualization, and remote monitoring of process data via a web browser.
The idea of the control system provides long-term achievement of process variables, analysis of process data, mathematical modelling of the process and its remote monitoring.
Moreover, the data constitute an important feedback in processes where the high risk of biofilm formation occurs, which is a general problem concerning industry of almost any type.