scholarly journals ANALISIS STANDAR JUMLAH PERSONEL PENANGANAN PENGANGKUTAN BARANG BERBAHAYA DI BANDAR UDARA ADISUTJIPTO

2017 ◽  
Vol 8 (1) ◽  
pp. 93
Author(s):  
Gunawan Gunawan ◽  
Rully Medianto
Keyword(s):  
Mathematical Model ◽  
Physical Examination ◽  
Standard Procedure ◽  
Air Cargo ◽  
Type B ◽  
X Ray ◽  
Cargo Handling ◽  
Dangerous Goods ◽  
Cargo Transportation ◽  
The Mathematical Model

Good and efficient Air cargo handling, especially for dangerous goods transportation need to be supported by licensed dangerous goods handling personnel and supported by the transport handling facilities as well as standard procedure. Comprehensive standards and procedures are required to reduce the risk of accidents caused by an error in the handling of the dangerous goods transportation. Main problems in this study: first, to analyse the process of air cargo transportation handling at the Adisutjipto Airport; second, to analyse the standard of the dangerous goods handling personel. The cargo handling process consists of Outgoing (Acceptance, weighing, Documentation, Marking & labeling, X-ray, Storage, Build-up, and Loading) and Incoming (Check Incoming Massage, Unloading, Breakdown, check lists, Physical Examination, Storage, Notice of Arrival, Delivered). The mathematical model of Dangerous Goods Handling Personnel Number Standard: DG Personel Cargo Agent Type A = c.% DG. (2,89 x 10^-2) DG Personnel Warehousing Type B = c.% DG (4,53 x 106-3), DG Personnel Airline Type B = c.%DG. (4,89 X 10^-4).

The Mathematical Modeling Stages of Combining the Carriage of Goods for Indefinite, Fuzzy and Stochastic Parameters

2020 ◽  
Vol 12 (7) ◽  
Author(s):  
Sergiy Kotenko ◽  
◽  
Vitalii Nitsenko ◽  
Iryna Hanzhurenko ◽  
Valerii Havrysh ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Radical Change ◽  
Short Term ◽  
Best Value ◽  
Stochastic Parameters ◽  
Mode Of Transportation ◽  
Cargo Transportation ◽  
Risk Parameters ◽  
The Mathematical Model

Combined cargo transportation in Ukraine is characterized by the presence of uncertain risks. The aim of the article was to propose a mathematical model for choosing the mode of transportation that would correspond to the best value of the integral objective function in the presence of fuzzy, stochastic and uncertain risk parameters. The efficiency of the mathematical model provided the possibility of forming not only long-term forecasts that require significant time, but also short-term forecasts in real time. This allows to quickly change routes and conditions of transportation. Practical testing of the mathematical model revealed the assimilating nature of some uncertain risks. The results of the analysis are given in the article. The realization of such a risk leads to a radical change in all conditions of transportation. Long-term forecasts allow to predict new routes and conditions of transportation.

scholarly journals A non-linear mathematical model for the X-ray variability of the microquasar GRS 1915+105 – III. Low-frequency quasi-periodic oscillations

2020 ◽  
Vol 497 (1) ◽  
pp. 405-415
Author(s):  
E Massaro ◽  
F Capitanio ◽  
M Feroci ◽  
T Mineo
Keyword(s):  
Mathematical Model ◽  
Equilibrium Points ◽  
Low Frequency ◽  
Input Function ◽  
Power Density Spectrum ◽  
Periodic Oscillations ◽  
Density Spectrum ◽  
X Ray ◽  
Almost All ◽  
The Mathematical Model

ABSTRACT The X-ray emission from the microquasar GRS 1915+105 shows, together with a very complex variability on different time-scales, the presence of low-frequency quasi-periodic oscillations (LFQPOs) at frequencies lower than ∼30 Hz. In this paper, we demonstrate that these oscillations can be consistently and naturally obtained as solutions of a system of two ordinary differential equations, which is able to reproduce almost all variability classes of GRS 1915+105. We modified the Hindmarsh–Rose model and obtained a system with two dynamical variables x(t), y(t), where the first one represents the X-ray flux from the source, and an input function J(t), whose mean level J0 and its time evolution is responsible of the variability class. We found that for values of J0 around the boundary between the unstable and the stable interval, where the equilibrium points are of spiral type, one obtains an oscillating behaviour in the model light curve similar to the observed ones with a broad Lorentzian feature in the power density spectrum and, occasionally, with one or two harmonics. Rapid fluctuations of J(t), as those originating from turbulence, stabilize the LFQPOs, resulting in a slowly amplitude modulated pattern. To validate the model, we compared the results with real RXTE data, which resulted remarkably similar to those obtained from the mathematical model. Our results allow us to favour an intrinsic hypothesis on the origin of LFQPOs in accretion discs ultimately related to the same mechanism responsible for the spiking limit cycle.

scholarly journals Blockchain in air cargo: challenges of new World

2021 ◽  
Vol 341 ◽  
pp. 00021
Author(s):  
Irina Poleshkina
Keyword(s):  
Information Exchange ◽  
New World ◽  
Digital Technologies ◽  
Air Cargo ◽  
Financial Flows ◽  
Cargo Handling ◽  
Blockchain Technology ◽  
Service Delays ◽  
Cargo Transportation ◽  
Operational Processes

The last years’ experience of functioning during the COVID-19 pandemic has shown that digital solutions can significantly increase the efficiency of business operational processes. This study focuses on the implementation of digital technologies at the airports to optimize information and financial flows, that are required for the air cargo transportation. The study was carried out based on the analysis of technological schedules of airports and airlines for cargo handling. As a result of this study, we have identified the main problematic operations leading to an increase in the time spent by cargo at the airports. The article examines and summarizes the world practice of using blockchain technology to manage information and financial flows in air cargo. The article has developed a model for the implementation of these technologies in the air cargo industry on the basis of a single blockchain platform. This model allows making optimal use of available airport resources in order to minimize service delays. It solves the main problem of creating the transparency of the information exchange between all air cargo transportation participants.

Thickness of Thin-Layer Liquid Film on a Rotating Roll and its Measurement by the X-Ray Backscattering Technique

1977 ◽  
Vol 47 (5) ◽  
pp. 311-316
Author(s):  
Nelson P. C. Chao
Keyword(s):  
Mathematical Model ◽  
Film Thickness ◽  
Thin Layer ◽  
Liquid Film ◽  
Liquid Viscosity ◽  
Roll Speed ◽  
Steady State Condition ◽  
X Ray ◽  
Experimental Values ◽  
The Mathematical Model

A mathematical model is provided to describe the thin-layer liquid film thickness on the surface of a rotating roll which is partially immersed in a liquid bath. The equation expresses the initial film thickness in terms of roll speed and immersion depth as well as liquid viscosity, surface tension, and density. The roll speed and liquid viscosity are the two dominant parameters affecting the film thickness. An x-ray backscattering technique was used to measure the film thickness. An important feature of this technique is that it permits the measurements to be carried out under a steady-state condition without disturbing the liquid film and the roll. The principle of a portable instrument and the technique involved in the measurements are described. Within the scope of the present investigation with Newtonian liquid and laminar flow, the experimental values of film thickness determined by the x-ray backscattering technique agreed very well with the theoretical values predicted by the mathematical model.

The Mathematical Model of the Broadband Transmission X-Ray Thickness Gauge

2019 ◽  
Vol 970 ◽  
pp. 210-218
Author(s):  
Sergei P. Osipov ◽  
Sergei Chakhlov ◽  
Daniyar Kairalapov ◽  
Oleg Osipov
Keyword(s):  
Mathematical Model ◽  
Measurement Error ◽  
Thickness Measurement ◽  
Performance Rating ◽  
Thickness Gauge ◽  
Attenuation Coefficients ◽  
Wide Beam ◽  
X Ray ◽  
Proposed Model ◽  
The Mathematical Model

The mathematical model of the broadband transmission X-ray thickness gauge is developed. The mathematical model consists of sectors: generation and transformation of radiometric signals; equation of transmission X-ray thickness gauge; error estimation of thickness measurement; performance rating. The example of the use of the proposed model to calculate of the transmission X-ray thickness gauge for aluminum items is provided. In the example the dependences of integral mass X-ray attenuation coefficients and the thickness of monitored objects made from aluminum are calculated. The range of optimum measured thickness depending on the maximum X-ray energy was selected, the measurement time to provide the desired thickness measurement error was estimated. The possibility of measuring the thickness of a cooper test object for a wide beam conditions has been experimentally confirmed.

scholarly journals Evaluación de la cinética de crecimiento de las capas boruradas formadas sobre la superficie de un acero AISI 4150 endurecido a través del proceso borurización base polvo

2019 ◽  
Vol 6 (11) ◽  
pp. 9-21
Author(s):  
Martín Ortiz-Domínguez ◽  
Arturo Cruz-Avilés ◽  
Irving Morgado-González ◽  
Jorge Zuno-Silva ◽  
Miguel Á. Flores-Rentería ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Optical Microscopy ◽  
Layer Thickness ◽  
Diffraction Method ◽  
Boride Layer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fe2b Phase ◽  
Thickness Measurements ◽  
The Mathematical Model

En el presente estudio se evalúa la cinética de difusión del boro en un acero AISI 4150 durante el proceso de borurización base polvo. Esta técnica de endurecimiento superficial produce en el material la formación de una fase característica, Fe2B. The morphology of Fe2B layers was observed by Optical Microscopy. Metallographic studies showed that the boride layer has a saw-tooth morphology in all the samples. The layer thickness measurements were done with the help of MSQ PLUS software. The Fe2B phase was identified by X-ray diffraction method. Finally, the mathematical model was validated.

scholarly journals Assessment of Cargo Delivery Quality Using Fuzzy Set Apparatus

2018 ◽  
Vol 7 (4.3) ◽  
pp. 262 ◽  
Author(s):  
Hanna Kyrychenko ◽  
Yurii Statyvka ◽  
Oleh Strelko ◽  
Yulia Berdnychenko ◽  
KHalyna Nesterenko
Keyword(s):  
Fuzzy Set ◽  
Cargo Handling ◽  
Operation Conditions ◽  
Cargo Delivery ◽  
Transportation Process ◽  
Data Files ◽  
Cargo Transportation ◽  
Objective Basis ◽  
The Mathematical Model

The influence of the existing operation conditions for the time of cargo transportation, i.e. ferrous metals to the port station, was investigated. It was proposed to carry out the management of cargo delivery on the basis of determining the values of cargo handling duration while implementing the stages of the schedule. It was proposed to carry out assessment of the delivery process, including transportation using the fuzzy set apparatus. To determine the quality of transportation, an ordered categorized scale of values of the duration of cargo's staying in certain conditions at delivery stages was proposed. The assessment of deviations at all the stages of transportation with the use of linguistic definitions of conditions allows quantifying such an indicator as the transportation quality. The characteristics of deviations during transportation are provided in the linguistic form to the dispatching unit for making a decision. The revealed regularities in deviations from the standard schedules of trains during delivery of cargos are an objective basis for taking into account them in the mathematical models of the forecast of time of cargo delivery at each of the defined stages of transportation. The data on the forecasted and actual transportations are accumulated in the existing information base, forming data files for assessing the quality of the transportation process, the adequacy of the mathematical model and correcting of the model in case of significant organizational or technical changes. 

A Study on Diffusion in Hot-Dip Aluminizing

2010 ◽  
Vol 97-101 ◽  
pp. 1253-1256 ◽  
Author(s):  
Yu Heng Lu ◽  
Shang Guan Qi ◽  
Cai Min Huang ◽  
Jie Hua Pan ◽  
Jian Min Zeng
Keyword(s):  
Mathematical Model ◽  
Diffusion Layer ◽  
Diffusion Coefficients ◽  
Elevated Temperatures ◽  
Actual Situation ◽  
The Finite Element Method ◽  
Argon Gas ◽  
X Ray ◽  
Thickness Of Diffusion Layer ◽  
The Mathematical Model

Hot-dip aluminizing panels of Q235 steels were produced in laboratory. Then the hot-dip aluminizing samples were executed diffusion at elevated temperatures protecting with flowing argon gas. Metallographic microscope, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were employed for compositional analyses and graphical analyses of coating. The diffusion process was researched and the phase’s microstructure after diffusion was analyzed and discussed. The hot-dip aluminizing diffusion mathematical model was established with the finite element method. The results show that after diffusion in hot-dip aluminizing, the aluminum of the coating disappeared. The thickness of diffusion layer increased and the dentate frame disappeared. There are some iron-rich phases such as Fe2Al5, FeAl and Fe3Al in the diffusion layer. The phase Fe2Al5 decreases and the phase FeAl increases. The mathematical model corresponds with the actual situation. The diffusion coefficients of Al atoms diffusing in intermetallic compounds were calculated at 950°C, which were 0.29×10-12 m2/s for Fe2Al5, 0.7×10-12 m2/s for FeAl, and 0.27×10-12 m2/s for Fe3Al, respectively.

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