Bulletin de la Société Royale des Sciences de Liège, 2017
A voice is a sound which is created by vibration of the vocal cords, which means that, the vocal ... more A voice is a sound which is created by vibration of the vocal cords, which means that, the vocal cords approach to each other by passing the air through the larynx and followed by different sounds. This vibration is under the influence of the statuses of tongue, teeth and lips, as well as the other effective factors. This vibrating air causes some minor changes around the individual speaker, which is called the voice. Some of the most important procedures in the voice signal analyzing is the signal processing methods in frequency and time-frequency domains; the most conventional approach in frequency domain is the Fast Fourier Transform (FFT) method, on the other hand the time-frequency signal processing methods can identify the frequency components of the signal and extract its time-varying characteristics; moreover they are effective tools for extracting the information of non-stationary signals. Time-frequency analysis methods can be classified into linear and nonlinear categorie...
Contractor selection is a critical activity, which plays an important role in the overall success... more Contractor selection is a critical activity, which plays an important role in the overall success of any construction project. The implementation of fuzzy multiple criteria decision attribute (MCDA) in selecting contractors has the advantage of rendering subjective and implicit decision making more objective and transparent. An additional merit of fuzzy MCDA is the ability to accommodate quantitative and qualitative information. In this paper, an integrated VIKOR-AHP methodology is proposed to make a selection among the alternative contractors in one of Iranian construction industry projects. In the proposed methodology, the weights of the selection criteria are determined by fuzzy pairwise comparison matrices of AHP.
Let G be a finite p-group, and let ⊗ 3 G {\otimes^{3}G} be its triple tensor product. In this pap... more Let G be a finite p-group, and let ⊗ 3 G {\otimes^{3}G} be its triple tensor product. In this paper, we obtain an upper bound for the order of ⊗ 3 G {\otimes^{3}G} , which sharpens the bound given by G. Ellis and A. McDermott, [Tensor products of prime-power groups, J. Pure Appl. Algebra 132 1998, 2, 119–128]. In particular, when G has a derived subgroup of order at most p, we classify those groups G for which the bound is attained. Furthermore, by improvement of a result about the exponent of ⊗ 3 G {\otimes^{3}G} determined by G. Ellis [On the relation between upper central quotients and lower central series of a group, Trans. Amer. Math. Soc. 353 2001, 10, 4219–4234], we show that, when G is a nilpotent group of class at most 4, exp ( ⊗ 3 G ) {\exp(\otimes^{3}G)} divides exp ( G ) {\exp(G)} .
One of the main challenges facing the sustainable development of the Kalaleh region is the need f... more One of the main challenges facing the sustainable development of the Kalaleh region is the need for better management of this limited karstic fresh water resources. Kalaleh mountainous region in the north of Iran is drained by several karstic springs such as Zaw, Aghsoo and Yal-cheshme, having discharge rate of 20 to 2500 lit/s. The springs are mainly discharged from Lar, Tirgan, Mozduran karstic formations. In this research, the potential recharge mapping and catchment area of the major karstic springs have been investigated based on the groundwater balance and a GIS approach considering geological factors. In another part of the study, the determined primary catchment area by hydrogeological budget method was reconfirmed with geological method and the results were acceptable. Eight potential recharge contributing factors were evaluated using the GIS including drainage and slope, karstic features, lithology, land cover, precipitation and lineaments. The weights and the score of the...
Two-dimensional diffusive and advective-diffusive chloride transport through clay and silt, respe... more Two-dimensional diffusive and advective-diffusive chloride transport through clay and silt, respectively, was investigated using laboratory models. The observed chloride concentration plumes in the soil samples as well as the chloride concentration-versus-time profiles in the source reservoirs were predicted using the computer code MIGRATEv9. Equivalent horizontal and vertical chloride diffusion coefficients reasonably predicted the observed concentration plumes and concentration-versus-time indicating that soils were homogeneous and isotropic. The predicted diffusion coefficients were in the range of the reported values for similar soils. The effect of downward Darcy flux in the advection-diffusion tests on the chloride concentration plumes was assessed by comparing the shapes of the plumes with those in the pure diffusion tests. The downward Darcy flux caused the concentration plumes in the advection-diffusion tests to migrate further in the vertical direction compared to that in ...
In this paper, we describe the explicit structures of nonabelian tensor squares of nonabelian gro... more In this paper, we describe the explicit structures of nonabelian tensor squares of nonabelian groups of order $$p^3q$$ p 3 q , where p and q are distinct prime numbers and $$p>2$$ p > 2 . Our method is based on determining the structures of their Schur multipliers by applying some well-known results and the presentations of groups, which leads us to obtain the orders of their nonabelian tensor squares.
Granitic groundwaters are important resources in arid regions. However, they are not always pure ... more Granitic groundwaters are important resources in arid regions. However, they are not always pure due to having appreciable amounts of trace elements. The present study was conducted to investigate chemical compositions for finding controls on distribution of heavy metals and natural radioelements (U and Th) in groundwater resources of Shir-Kuh granitoid aquifer (SGA), central Iran. Thirty water samples were collected and analyzed for major and trace elements. The average values of electrical conductivity (EC) and pH are 624 μs/cm and 7.5, respectively. The dominant groundwater type is Ca-HCO3, as a result of the calcite dissolution and biotite weathering. Principal component analysis in support of mass balance studies recognizes dissolution of fracture-filling sediments and rock mineral weathering as the main factors enhancing major ions in SGA. These processes also release trace elements in decreasing order of Sr > Ba > Sn > W > Cu > U > Zn > Th. Weathering of ...
ABSTRACT Hydrogeochemical investigations were carried out in the Dashtestan, the eastern part of ... more ABSTRACT Hydrogeochemical investigations were carried out in the Dashtestan, the eastern part of Borazjan, with a focus on fluoride content. The study area is underlain by a complex geology that is dominated by three lithological units, namely marl, alluvial sediments, and carbonate rocks. To assess the major geochemical factors controlling the fluoride enrichment in water, 37 groundwater and 12 surface water samples were collected from the three lithological units. Fluoride concentrations ranged up to 3 mg/L, and average concentrations varied from 1.12 (in carbonate aquifers) to 1.73 (in alluvial aquifers) to 1.82 mg/L (in marl aquifers). To study the influence of rocks and soils on groundwater quality, an additional 41 soil and rock samples were also taken and analyzed for fluoride. The order of average fluoride content in both rocks and soils is: marl[alluvial sediments[limestone, which confirms that marl is a likely source of fluoride.
Finite element modeling of stabilized soils requires various data obtained from comprehensive lab... more Finite element modeling of stabilized soils requires various data obtained from comprehensive laboratory experiments. High shear strengths and expensive test procedure of lime and cement stabilized soils almost make it impossible to attain a well describing data of stabilized materials to apply in FE models in some cases; Thus, this study has considered unconfined compressive strength as a not expensive laboratory strength test and utilized estimating functions presented recently for stabilized materials to evaluate the shear strength parameters of treated materials to be used in computer simulations. The estimated properties were applied in FE modeling to verify which estimating function is more appropriate for lime and cement treated granular soils. The study results show that at the mid-range strength of stabilized soils most of applied functions have a good compatibility with laboratory conditions but at lower or higher strengths some of functions would excel.
... J. Mol. Catal. A: Chem. ... [CrossRef], [Web of Science ®] View all references ] selectfluor,... more ... J. Mol. Catal. A: Chem. ... [CrossRef], [Web of Science ®] View all references ] selectfluor, [ 28 28.Shinu , VS ; Sheeja , B. ; Purushothaman , E. ; Bahulayan , D. An efficient green MCR protocol for the stereoselective synthesis of β-acetamido ketones catalyzed by Selectfluor . ...
1,3,4-Oxadiazoles and their derivatives have a wide range of biological and therapeutic propertie... more 1,3,4-Oxadiazoles and their derivatives have a wide range of biological and therapeutic properties such as antimicrobial [1], antifungal [2], and anti-inflammatory action [3]. Also, vinblastine-like [4] oxadiazole molecules that incorporate a coumarin moiety have been reported as ...
Bulletin de la Société Royale des Sciences de Liège, 2017
A voice is a sound which is created by vibration of the vocal cords, which means that, the vocal ... more A voice is a sound which is created by vibration of the vocal cords, which means that, the vocal cords approach to each other by passing the air through the larynx and followed by different sounds. This vibration is under the influence of the statuses of tongue, teeth and lips, as well as the other effective factors. This vibrating air causes some minor changes around the individual speaker, which is called the voice. Some of the most important procedures in the voice signal analyzing is the signal processing methods in frequency and time-frequency domains; the most conventional approach in frequency domain is the Fast Fourier Transform (FFT) method, on the other hand the time-frequency signal processing methods can identify the frequency components of the signal and extract its time-varying characteristics; moreover they are effective tools for extracting the information of non-stationary signals. Time-frequency analysis methods can be classified into linear and nonlinear categorie...
Contractor selection is a critical activity, which plays an important role in the overall success... more Contractor selection is a critical activity, which plays an important role in the overall success of any construction project. The implementation of fuzzy multiple criteria decision attribute (MCDA) in selecting contractors has the advantage of rendering subjective and implicit decision making more objective and transparent. An additional merit of fuzzy MCDA is the ability to accommodate quantitative and qualitative information. In this paper, an integrated VIKOR-AHP methodology is proposed to make a selection among the alternative contractors in one of Iranian construction industry projects. In the proposed methodology, the weights of the selection criteria are determined by fuzzy pairwise comparison matrices of AHP.
Let G be a finite p-group, and let ⊗ 3 G {\otimes^{3}G} be its triple tensor product. In this pap... more Let G be a finite p-group, and let ⊗ 3 G {\otimes^{3}G} be its triple tensor product. In this paper, we obtain an upper bound for the order of ⊗ 3 G {\otimes^{3}G} , which sharpens the bound given by G. Ellis and A. McDermott, [Tensor products of prime-power groups, J. Pure Appl. Algebra 132 1998, 2, 119–128]. In particular, when G has a derived subgroup of order at most p, we classify those groups G for which the bound is attained. Furthermore, by improvement of a result about the exponent of ⊗ 3 G {\otimes^{3}G} determined by G. Ellis [On the relation between upper central quotients and lower central series of a group, Trans. Amer. Math. Soc. 353 2001, 10, 4219–4234], we show that, when G is a nilpotent group of class at most 4, exp ( ⊗ 3 G ) {\exp(\otimes^{3}G)} divides exp ( G ) {\exp(G)} .
One of the main challenges facing the sustainable development of the Kalaleh region is the need f... more One of the main challenges facing the sustainable development of the Kalaleh region is the need for better management of this limited karstic fresh water resources. Kalaleh mountainous region in the north of Iran is drained by several karstic springs such as Zaw, Aghsoo and Yal-cheshme, having discharge rate of 20 to 2500 lit/s. The springs are mainly discharged from Lar, Tirgan, Mozduran karstic formations. In this research, the potential recharge mapping and catchment area of the major karstic springs have been investigated based on the groundwater balance and a GIS approach considering geological factors. In another part of the study, the determined primary catchment area by hydrogeological budget method was reconfirmed with geological method and the results were acceptable. Eight potential recharge contributing factors were evaluated using the GIS including drainage and slope, karstic features, lithology, land cover, precipitation and lineaments. The weights and the score of the...
Two-dimensional diffusive and advective-diffusive chloride transport through clay and silt, respe... more Two-dimensional diffusive and advective-diffusive chloride transport through clay and silt, respectively, was investigated using laboratory models. The observed chloride concentration plumes in the soil samples as well as the chloride concentration-versus-time profiles in the source reservoirs were predicted using the computer code MIGRATEv9. Equivalent horizontal and vertical chloride diffusion coefficients reasonably predicted the observed concentration plumes and concentration-versus-time indicating that soils were homogeneous and isotropic. The predicted diffusion coefficients were in the range of the reported values for similar soils. The effect of downward Darcy flux in the advection-diffusion tests on the chloride concentration plumes was assessed by comparing the shapes of the plumes with those in the pure diffusion tests. The downward Darcy flux caused the concentration plumes in the advection-diffusion tests to migrate further in the vertical direction compared to that in ...
In this paper, we describe the explicit structures of nonabelian tensor squares of nonabelian gro... more In this paper, we describe the explicit structures of nonabelian tensor squares of nonabelian groups of order $$p^3q$$ p 3 q , where p and q are distinct prime numbers and $$p>2$$ p > 2 . Our method is based on determining the structures of their Schur multipliers by applying some well-known results and the presentations of groups, which leads us to obtain the orders of their nonabelian tensor squares.
Granitic groundwaters are important resources in arid regions. However, they are not always pure ... more Granitic groundwaters are important resources in arid regions. However, they are not always pure due to having appreciable amounts of trace elements. The present study was conducted to investigate chemical compositions for finding controls on distribution of heavy metals and natural radioelements (U and Th) in groundwater resources of Shir-Kuh granitoid aquifer (SGA), central Iran. Thirty water samples were collected and analyzed for major and trace elements. The average values of electrical conductivity (EC) and pH are 624 μs/cm and 7.5, respectively. The dominant groundwater type is Ca-HCO3, as a result of the calcite dissolution and biotite weathering. Principal component analysis in support of mass balance studies recognizes dissolution of fracture-filling sediments and rock mineral weathering as the main factors enhancing major ions in SGA. These processes also release trace elements in decreasing order of Sr > Ba > Sn > W > Cu > U > Zn > Th. Weathering of ...
ABSTRACT Hydrogeochemical investigations were carried out in the Dashtestan, the eastern part of ... more ABSTRACT Hydrogeochemical investigations were carried out in the Dashtestan, the eastern part of Borazjan, with a focus on fluoride content. The study area is underlain by a complex geology that is dominated by three lithological units, namely marl, alluvial sediments, and carbonate rocks. To assess the major geochemical factors controlling the fluoride enrichment in water, 37 groundwater and 12 surface water samples were collected from the three lithological units. Fluoride concentrations ranged up to 3 mg/L, and average concentrations varied from 1.12 (in carbonate aquifers) to 1.73 (in alluvial aquifers) to 1.82 mg/L (in marl aquifers). To study the influence of rocks and soils on groundwater quality, an additional 41 soil and rock samples were also taken and analyzed for fluoride. The order of average fluoride content in both rocks and soils is: marl[alluvial sediments[limestone, which confirms that marl is a likely source of fluoride.
Finite element modeling of stabilized soils requires various data obtained from comprehensive lab... more Finite element modeling of stabilized soils requires various data obtained from comprehensive laboratory experiments. High shear strengths and expensive test procedure of lime and cement stabilized soils almost make it impossible to attain a well describing data of stabilized materials to apply in FE models in some cases; Thus, this study has considered unconfined compressive strength as a not expensive laboratory strength test and utilized estimating functions presented recently for stabilized materials to evaluate the shear strength parameters of treated materials to be used in computer simulations. The estimated properties were applied in FE modeling to verify which estimating function is more appropriate for lime and cement treated granular soils. The study results show that at the mid-range strength of stabilized soils most of applied functions have a good compatibility with laboratory conditions but at lower or higher strengths some of functions would excel.
... J. Mol. Catal. A: Chem. ... [CrossRef], [Web of Science ®] View all references ] selectfluor,... more ... J. Mol. Catal. A: Chem. ... [CrossRef], [Web of Science ®] View all references ] selectfluor, [ 28 28.Shinu , VS ; Sheeja , B. ; Purushothaman , E. ; Bahulayan , D. An efficient green MCR protocol for the stereoselective synthesis of β-acetamido ketones catalyzed by Selectfluor . ...
1,3,4-Oxadiazoles and their derivatives have a wide range of biological and therapeutic propertie... more 1,3,4-Oxadiazoles and their derivatives have a wide range of biological and therapeutic properties such as antimicrobial [1], antifungal [2], and anti-inflammatory action [3]. Also, vinblastine-like [4] oxadiazole molecules that incorporate a coumarin moiety have been reported as ...
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