Fluctuation

The fuzzy time series model has become a research topic attracting attention because of its practical value in the field of time series forecasting, specifically, it is useful for time series with small observations or the one of strong fluctuations. This paper introduces a fuzzy time series model based on hedge algebra with a new formula for calculating forecasting values.

9p viengfa 28-10-2024 1 0   Download

In this paper, several IAA farming systems practiced in Vietnam are described, and their impacts are also reviewed. It is speculated that in developing countries like Vietnam, the IAA farming system should be targeted for support as a sustainable food safety model and a form of ecosystem-based technology to reduce environmental impacts, adapt to climate change, help avoid risks from market fluctuation, and increase incomes in comparison with monoculture farming.

8p vibecca 01-10-2024 1 1   Download

This study presents a novel application of mesh-free method using the smoothed-radial basis functions for the computational homogenization analysis of materials. The displacement field corresponding to the scattered nodes within the representative volume element (RVE) is split into two parts including mean term and fluctuation term, and then the fluctuation one is approximated using the integrated radial basis function (iRBF) method.

12p vifilm 24-09-2024 2 1   Download

his paper does not mention about the partial nitritation process. The results showed that, with the operational time of 193 days, the influent T-N concentration fluctuated from 90-180 mgN/L, and T-Nremoval efficiency increased from 29.4% to 61.4% in stepwise.

7p viyoko 24-09-2024 2 1   Download

During menopause transitions, fluctuate hormone levels make menopausal women susceptible to mental and physical disorders that affect their quality of life. Research on menopauserelated problems, especially among rural women, are currently insufficient. With that sense, our objective is to investigate signs of dysfunction and quality of life (QOL) in menopausal women in Vietnam, 2021.

7p visunati 23-08-2024 1 1   Download

The primary objective of this work is to study the aerodynamic pressures on Mirror Surface at Various speeds to determine the effects of aerodynamics on to Mirror vibration. Additionally, the Mirror was modified by Shrouding around the external periphery to determine the possibility of minimisation of aerodynamic pressure fluctuations and thereby vibration. The Shrouding length used for the analysis was of 24mm, 34mm and 44mm length.

207p runthenight05 01-03-2023 7 3   Download

Market failure, inconsistency and fluctuation have been some of the challenges facing small-medium scale farmers (SMFs) in Fiji. Past records show that major government and privately driven marketing projects have failed to achieve long-term sustainability. This thesis takes into account these shortcomings and proposes an alternative framework based on the ideology of clustering, which has been shown to be successful in other countries.

322p runthenight04 02-02-2023 7 5   Download

In conclusion, symbiotic algae tend to be species-specific, whereas bacteria fluctuate significantly over sampling time. Studying the molecular issues of microalgae, the presence, the role of some groups of bacteria involved in the N, C, P, and S cycles, and the influence of environmental parameters should also be encouraged to understand the relationship of coral holobiont better.

12p vipagani 24-10-2022 8 3   Download

In this paper, we improve the DFA algorithm to MDFA (MultiDetrended fluctuation analysis) to evaluate the possibility of arrhythmias RR intervals detail for each period of 20 minutes in entire RR intervals. Evaluation results are shown graphically intuitive with three levels of basic arrhythmia arrhythmia is high, medium and low arrhythmia.

4p vilexus 05-10-2022 7 2   Download

Clarifying the fluctuation of steroid hormone levels in the blood plasma of rabbitfish Siganus guttatus (Bloch, 1787) during the spawning cycle as a basis for studies on artificial reproduction of rabbitfish in particular and marine fish in general.

27p unforgottennight02 20-08-2022 11 3   Download

High-resolution marine seismic reflection studies on the eastern shelf of the Saros Gulf have revealed the presence of gascharged sediments across a narrow submarine valley incised by the Ganos Fault along the North Anatolian Fault system. Quaternary sediments, accumulated during glacial and interglacial periods through transgressional and progradational units, were controlled by glacio-eustatic sea-level fluctuations and tectonic deformation. The transgressional units made of upward-fining deposits created seals at their tops to form gas accumulation pockets.

20p tanmocphong 29-01-2022 10 1   Download

Results show that, according to the linear regression analysis, regional annual rainfall is not much fluctuated, the rainy season and annual rainfall tend to decrease, while rainfall in the dry season tends to increase. According to Sen’s slope chart, July rain gains highest increasement, while that of August tends to decrease most. In general, the precipitation concentration index revealed the presence of a high and very high concentration of rainfall.

11p meyerowitz 25-12-2021 15 0   Download

In Vietnam, and particularly in Gia Lam, Hanoi, average yields are low, prices are high, and local demand is not met. Reasons for low yields in Vietnam include climate change, drought, flooding and infestation by new species of insects. This study was done to identify the species of insects which are found in the corn fields of Gia Lam, Hanoi.

9p tamynhan8 04-11-2020 19 3   Download

The diffusion coefficient is found to be a product of the rate of LDF and mean square displacement of Fe particles per LDF. The diffusion is realized by two types of activated LDFs. First type is accompanied by frequent back-and-forth movements of Fe particles. The second type causes the random movement of Fe particles.

7p tamynhan8 04-11-2020 8 1   Download

The study objective is the examination of the impact of USD / CNY exchange rate on macroeconomic factors by evaluating the specific effects of the USD / CNY exchange on economic growth, inflation and currency in Vietnam. Based on the results, the study will propose some recommendations in the exchange rate policy management in order to mitigate the negative effects of exchange rate fluctuations, then contribute to Vietnamese economic objectives.

33p slimzslimz 23-12-2019 52 9   Download

This study assesses the importance of monetary policy in macroeconomic stability in Vietnam through controlling the credit growth; evaluates the relevance of the new Keynes model in explaining macroeconomic fluctuations; uses the SVAR new Keynes model to evaluate the response of macro variables to the shocks of themselves; proposes the DSGE new Keynes model that serves to analyze, forecast and communicate macroeconomic’s policies in Vietnam.

43p bibianh 19-09-2019 49 5   Download

The thesis aims to systematize the theory of FDI, macroeconomic fluctuations and the impact of FDI on macroeconomic fluctuations in an economy; analyze and assess the status of FDI attraction and use, the situation of macroeconomic fluctuations; propose solutions to attract, manage and effectively use FDI, taking advantage of the positive and drought effects of FDI on the macroeconomic situation in Vietnam.

0p dungmaithuy 17-09-2019 61 4   Download

The dissertation aims to study to reduce torsional vibration for the shaft The machine is equipped with DVA (dynamic vibration absorber) oscillator, mass disk type - spring - viscous. To know more details of the content please refer to the thesis summary.

32p xacxuoc4321 11-07-2019 27 3   Download

This provides fifty times the observations for each business cycle allowing for much more robust statistical results. The state-level data, along with the newly developed jobless recovery measure from chapter one, is used to test several of the existing hypotheses on the causes of jobless recoveries.

131p fugu897 03-07-2019 30 4   Download

The dynamic properties of iron liquid (Fe) are studied by molecular dynamics (MD) simulation. We trace the evolution of local density fluctuations (LDFs) in Fe liquid over the simulation time and in the 300-2300 K temperature range. The result simulation reveals that atomic diffusion is realized through the LDFs and the high localization LDFs at low temperature in the iron liquid is the cause of the anomalous dynamics slowdown. We find that the diffusion depends on both rate of LDFs and the averaged square displacement of particles Fe as one LDF occurs.

6p blackwidow123 15-06-2018 28 3   Download