Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The problem of how to precisely measure the volume fractions of oil-gas-water mixtures in a pipeline remains as one of the main challenges in the petroleum industry. This paper reports the capability of Radial Basis Function (RBF) in forecasting the volume fractions in a gas-oil-water multiphase system. Indeed, in the present research, the volume fractions in the annular three-phase flow are measured based on a dual energy metering system including the Eu and Cs and one NaI detector, and then modeled by a RBF model. Since the summation of volume fractions are constant (equal to 100%), therefore it is enough for the RBF model to forecast only two volume fractions. In this investigation, three RBF models are employed. The first model is used to forecast the oil and water volume fractions. The next one is utilized to forecast the water and gas volume fractions, and the last one to forecast the gas and oil volume fractions. In the next stage, the numerical data obtained from MCNP-X code must be introduced to the RBF models. Then, the average errors of these three models are calculated and compared. The model which has the least error is picked up as the best predictive model. Based on the results, the best RBF model, forecasts the oil and water volume fractions with the mean relative error of less than 0.5%, which indicates that the RBF model introduced in this study ensures an effective enough mechanism to forecast the results.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.apradiso.2017.08.027 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Staged Gamma Knife radiosurgery for large brain metastases: Local control and the influence of systemic treatment.
Radiother Oncol
September 2025
Amsterdam UMC, Location University of Amsterdam, Department of Neurosurgery, Meibergdreef 9, Amsterdam, the Netherlands; Amsterdam Neuroscience, Amsterdam, the Netherlands; Cancer Center Amsterdam, Amsterdam, the Netherlands.
Background And Purpose: Staged Gamma Knife radiosurgery (SGKRS) delivers high-dose radiotherapy to large brain metastases (BM) in two or three fractions with a time interval of several weeks. Various systemic treatments have also demonstrated favorable intracranial responses. Therefore, the outcome of patients undergoing radiosurgery and systemic treatment for large BM is of high interest but unknown.
View Article and Find Full Text PDFClinical outcomes following TAVR for patients with low and very low gradient aortic stenosis.
Prog Cardiovasc Dis
September 2025
Department of Cardiovascular Medicine, Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA. Electronic address:
Objectives: This study explores the impact of lower baseline aortic valve (AV) mean gradients on the clinical outcomes of patients with low-gradient aortic stenosis (LG AS) post-transcatheter aortic valve replacement (TAVR). Additionally, the study aims to understand the predictors of a lower baseline AV mean gradient (MG).
Background: Reduced left ventricular ejection fraction (LVEF) and low-flow states are known to correlate with worse clinical outcomes.
Medium Effect of Bicontinuous Microemulsion on Cobaltocene-Mediated Electroreduction of Coenzyme NAD.
Langmuir
September 2025
Key Laboratory of Colloid and Interface Chemistry of the Education Ministry of China, Shandong University, Jinan 250100, China.
In this paper, a phosphate buffer (0.10 M, pH 7.5)--hexadecane bicontinuous microemulsion (BME) stabilized by the nonionic surfactant CE was for the first time used as the medium to investigate its effect on the electrochemical behavior of the cobaltocene redox couple ( (III)/ (II)) as electron mediator and the -mediated electroreduction of coenzyme NAD.
View Article and Find Full Text PDFQuantifying tumour microvasculature with optical coherence angiography and intravoxel incoherent motion diffusion MRI.
IEEE Trans Med Imaging
September 2025
Intravoxel Incoherent Motion (IVIM) MRI is a contrast-agent-free microvascular imaging method finding increasing use in biomedicine. However, there is uncertainty in the ability of IVIM-MRI to quantify tissue microvasculature given MRI's limited spatial resolution (mm scale). Nine NRG mice were subcutaneously inoculated with human pancreatic cancer BxPC-3 cells transfected with DsRed, and MR-compatible plastic window chambers were surgically installed in the dorsal skinfold.
View Article and Find Full Text PDFImproved Cardiac Structure and Ventricular-Arterial Coupling After Baroreflex Activation Therapy.
JACC Case Rep
September 2025
Cardiovascular Division, Department of Medicine, Froedtert and Medical College of Wisconsin, Milwaukee, Wisconsin, USA. Electronic address:
Baroreflex activation therapy (BAT) improves functional status, quality of life, and exercise capacity in patients with heart failure with reduced ejection fraction; however, its direct effects on reversing adverse cardiac remodeling as assessed by improvements in cardiac structure, function, and coupling with the arterial system remain unclear. We present 2 cases of patients who initially presented with decompensated heart failure, and despite initial medical therapy and continued outpatient follow-up, were unable to tolerate full escalation of guideline-directed medical therapy. The patients remained symptomatic, with high biomarker levels, poor functional capacity, severe heart failure symptoms, and objectively had decreased stroke volume, low left ventricular ejection fraction, and high left ventricular mass.
View Article and Find Full Text PDF