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Frequency ratio
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This paper investigates the nonlinear vibration of saturated porous functionally graded plate subjected to the combination of mechanical and thermal loadings. Three different distributions of porosity are considered. Based on the Biot and higher order shear deformation theories, the vibration characteristics including natural frequency, deflection amplitude – time curves and relation between frequency ratio and amplitude of the saturated porous plate are determined.
13p
viambani
18-06-2024
3
1
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This paper presents a method for establishing the exact receptance function of a tapered axially functionally graded (AFG) beam with nonlinear ratios of properties using the Adomian method. In current papers, the Adomian method was applied for linearly tapered beams where the geometric series was used conveniently.
22p
dianmotminh02
03-05-2024
3
2
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This paper studies the damping characteristics of the soil foundation under a building concerning the Soil-Structure Interaction (SSI). By considering a multi-story building resting on a piled raft foundation as a typical SSI system, subjected to an earthquake (i.e., Chi Chi earthquake, Taiwan 1999), the timedependent responses of specified locations in the foundation are recorded and analyzed, both in-time domain and frequency domain.
12p
vibego
02-02-2024
2
1
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The results show that the O atom, as compared to the S, Se, and Te ones acting as proton acceptors, plays a peculiar role in the C-H blue shift of stretching frequencies involving hydrogen bonds. It is found that the magnitude of red- or blue-shift of the C-H stretching frequency in the hydrogen bond is mainly determined by the C-H polarity (DPE) and gas phase basicity (PA) of the proton acceptor in the isolated isomer, besides relevant weak interactions and the geometrical structure of the formed complex.
17p
vibego
02-02-2024
0
0
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By aggregating the calculation of indicators assessing the popularity of non-tariff measures including coverage ratio, frequency index and prevalence score, combined with the tallying method of the number of non-tariff measures applied by ASEAN member states collected from sources such as TRAINS – UNCTAD, WITS – World Bank, this study has assessed the dissemination of the application of ASEAN’s non-tariff measures in the period from 2015 to 2022.
11p
vijeff
01-12-2023
4
2
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Continued part 1, part 2 of ebook "Schaum's outline of theory and problems of electronic devices and circuits" provides readers with contents including: Chapter 5 - Transistor bias considerations; Chapter 6 - Small-signal midfrequency BJT amplifiers; Chapter 7 - Small-signal midfrequency FET and triode amplifiers; Chapter 8 - Frequency effects in amplifiers; Chapter 9 - Operational amplifiers; Chapter 10 - Switched mode power supplies;...
175p
dangsovu
20-10-2023
14
5
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In this study, the crude polysaccharides from fruiting bodies of Vietnamese Lingzhi collected from the South of Vietnam were analyzed and compared based on monitoring the absorbance of the samples in 490 nm, as well as enzymatic, microwave and ultrasonic methods with different surveyed parameters, such as: concentration of enzyme, microwave frequencies, extraction time, extraction temperature, ratio of sample and water.
5p
viisac
23-09-2023
5
1
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We studied giant magnetoimpedance (GMI) effect in magnetically soft amorphous Co-rich microwires in the extended frequency range. From obtained experimentally dependences of the GMI ratio on magnetic field at different frequencies we estimated the penetration depth and its dependence on applied magnetic field and frequency.
5p
viberbers
09-08-2023
3
3
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In the numerical results, the influence of length to width ratio, imperfection, elastic foundations and temperature increment were evaluated in detail. The optimal results from DE algorithm are shown and compared.
17p
viberkshire
09-08-2023
8
4
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Horses produce only one foal from an eleven-month gestation period, making the maintenance of high reproductive rates essential. Genetic bottlenecks and inbreeding can increase the frequency of deleterious variants, resulting in reduced reproductive levels in a population.
9p
vihagrid
30-01-2023
7
3
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Continued part 1, part 2 of ebook "Home recording studio: Build it like the pros" provide readers with content about: room testing; room treatments; putting it all together; myths and legends; codes, permits, and special needs;... Please refer to the part 2 of ebook for details!
192p
langmongnhu
14-12-2022
9
3
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In this paper, the drilling tool integrating damping system is tested with Experimental Modal Analysis (EMA). The natural frequencies, the damping ratios, and mode shapes are detected. Through modal analysis testing the new damped drilling tool shows better damping ratio than the conventional tool.
5p
vispyker
16-11-2022
8
1
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Continued part 1, part 2 of ebook "Process dynamics and control (4th edition)" provide readers with content about: frequency response analysis and control system design; feed forward and ratio control; advanced process control; enhanced single-loop control strategies; digital sampling, filtering, and control; multi loop and multi variable control; real-time optimization; model predictive control;... Please refer to the ebook for details!
260p
duonghanthienbang
05-10-2022
7
1
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In the current work HRV was assessed by traditional linear time and frequency-domain indexes, in parallel with the non linear indexes. Both linear time and frequency domain parameters, and nonlinear parameters discriminate the different levels. Poincaré plot analysis is a promising method in statistical evaluation and arrhythmia cases.
4p
vilexus
05-10-2022
9
2
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Lecture Automatic control systems technology - Lesson 21: Methods of system analysis. After this presentation you will be able to: compute the value of transfer function for given frequencies; compute the open loop response of a control system; compute and interpret the closed loop response of a control system; compute and interpret the error ratio of a control system;... Please refer to the content of document.
29p
tieuvulinhhoa
22-09-2022
8
5
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The purpose of this study was to investigate factors affecting domestic violence risk behaviors among Thai Muslim married couples in Satun Province. The data were collected from 1,920 wives as representatives of families, and analyzed using the R program to find out frequencies, percentages, chi-square test, odds ratios, and logistic coefficients.
8p
guernsey
28-12-2021
8
0
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The power generated by the coupled system from the non-linear impact is sensitive to the thickness ratio of the beams and the clearance. The variation in thickness ratio alters the spacing of the natural frequencies of the system which causes modes to interact. This study shows that higher power is produced than the linear system, depending on the dissimilarity in the mode shapes of the interacting close modes.
9p
guernsey
28-12-2021
13
0
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The purpose of the study is to find the effects of different growing site conditions on trees with the vessel features in the woods of Quercus ilex L. growing in different regions through Turkey, and to evaluate the results in respect of forestry. A total of 102 wood samples were collected from 102 sampling plots (as 20 m × 10 m plots) in 9 distribution areas in Turkey. Environmental, climate and stand data were obtained for each plot. Standard wood anatomical studies were performed.
18p
hanthienngao
30-11-2021
15
0
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This paper presents three analytical methods to determine optimal parameters of the passive mass-springdisc dynamic vibration absorber (DVA), such as the ratio between natural frequency of DVA and shaft, damping ratio of DVA. The original model presented by Den Hartog, Luft and Warburton are solved and has shown in good agreement. Three analytical methods is then adopted for torsional shaft model.
6p
cothumenhmong11
10-05-2021
17
2
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In this paper, a two-dimensional functionally graded sandwich (2D-FGSW) beam model formed from three constituent materials is proposed and its free vibration analysis is carried out for the first time. The beam consists of three layers, a homogeneous core and two skin layers of 2D-FGM. The material properties of the skin layers are considered to vary in both the thickness and longitudinal directions by power gradation laws.
17p
nguaconbaynhay11
07-04-2021
16
1
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