Forecasting Air Passengers of Changi Airport Based on Seasonal Decomposition and an LSSVM Model

Vu, G.X.M.; Zhong, Zhao

doi:10.18488/journal.79.2018.51.12.30

Cited by 4 publications

(2 citation statements)

References 20 publications

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“…The airplane equipped with a signal generator transmits pilot signals and the ground station receives and saves the signal to analyze the air-to-ground channels. Since the Zadoff-Chu (ZC) sequence has good auto correlation property [7][8][9], the ZC sequence is used for the pilot signal. The ground station is located in mountainous area since the Korean terrain is mostly mountain.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Analysis for Air-to-Ground Channel in 400 MHz Band

Nam¹,

Ju²,

Jeong³

2019

ujeee

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Background/Objectives: Recently, air-to-ground wireless communication systems have been used in various equipment such as unmanned aerial vehicle (UAV). In this paper, we analyze the air-to-ground channel in 400 MHz band with experiment using light aircraft. Methods/Statistical analysis: The characteristics of the air-to-ground channel are analyzed as follows. We generate and store a pilot signal in commercial vector signal generator and an aircraft equipped with the signal generator takes off. As a pilot signal, Zadoff-Chu sequence is used for its good autocorrelation characteristics. In the ground station, the received waveform is stored by using spectrum analyzer. When an airplane approaches near the ground station, airplane transmits the pilot signal and the ground station begins to store the received signals. After completing the signal storing, air-to-ground channel analysis is performed. Findings: From the experiments, we obtained several hundreds of received waveforms, and those waveforms are used for statistical air-to-ground channel analysis. According to the analysis results, most of the measurement channels are single path or line of sight channels. However, in a certain measurement, multiple paths or non-line of sight channels are observed. Those results confirm that multipath environments exist at certain air-to-ground condition. The maximum number of multipath components is 4 and the maximum delay spread is 0.4 µ sec. Therefore, when designing a wireless communication system considering air-to-ground environments, the design should consider 4-path fading channels and maximum delay spread over 0.4 µsec. When designing air-to-ground wireless communication systems such as aircraft and drone systems, the experimental and analyzed channels in this paper might be useful. Improvements/Applications: In this paper, we analyze the air-to-ground channel characteristics of a mountainous area in Korea with field experiment using light aircraft. The analyzed channel characteristics are helpful to those who want to design wireless communication systems between aircraft to ground or UAV to ground. In addition, the analyzed channel can be used for verification of compatibility for the existing communication systems to air-to-ground applications.

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Section: Introductionmentioning

confidence: 99%

Experiment and Analysis for Air-to-Ground Channel in 400 MHz Band

Nam¹,

Ju²,

Jeong³

2019

ujeee

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“…of soil erosion (tons / ha / year) R = Rain Erosion (cm) K = soil accessibility L = lerang length (m) S = Slope of slope (%) C = Ground cover vegetation and crop management P = Specific action factor for soil conservation used(Arsyad, 2010;Vu & Zhong 2018) …”

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confidence: 99%

Prediction of Land Erosion by USLE Method in Dibawah Lake Catchment Areas, Solok Regency

Siddiq¹

2019

cea

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The Government of West Sumatra functioned Dibawah Lake as a tourist area. Besides that, it is also used as an irrigation water source. Location of the Dibawah Lake, which is in the highlands with slope levels between 28%-40% gives rise to the potential for land erosion in the lake catchment area, which is quite high. This study aims to predict the magnitude of land erosion, sediment delivery ratio and sedimentation rate in lake bodies using topographic spatial analysis and the USLE (Universal Soil Loss Equation) method. From the results of the analysis, it was found that the Dibawah Lake Catchment Area reached 2881.7 ha, which was divided into 27 sub-catchments. The rainfall erosivity value (R) of the Dibawah Lake catchment area is 8219.46 mm. The types of soils in the Dibawah Lake catchment area are cambisols and Andosols with soil erodibility values (K) 0.22 and 0.20. The slope average of the Dibawah lake catchment area is 28%-40%. The total land erosion in the Dibawah Lake catchment area is 1061.36 tons/ year. The Sediment Delivery Ratio (SDR) of the Dibawah Lake catchment area is 31.08%. With an SDR value of 31.08%, the sedimentation rate in the Dibawah Lake body is 329.85 tons/ year.

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An enhanced monthly runoff forecasting using least squares support vector machine based on Harris hawks optimization and secondary decomposition

Xiong

Wang

et al. 2023

Earth Sci Inform

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Forecasting Air Passengers of Changi Airport Based on Seasonal Decomposition and an LSSVM Model

Cited by 4 publications

References 20 publications

Experiment and Analysis for Air-to-Ground Channel in 400 MHz Band

Experiment and Analysis for Air-to-Ground Channel in 400 MHz Band

Prediction of Land Erosion by USLE Method in Dibawah Lake Catchment Areas, Solok Regency

An enhanced monthly runoff forecasting using least squares support vector machine based on Harris hawks optimization and secondary decomposition

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