Methods for modeling

To predict the survival probability of septic patients over time, integrating the Sequential Organ Failure Assessment (SOFA) score with other key clinical features. Subject and method: Using stepwise and exhaustive search techniques, we analyzed time-dependent data from 125 patients in the Intensive Care Unit of the 108 Military Central Hospital, collected during a cohort study conducted between December 2019 and February 2021.

11p vihizuzen 26-05-2025 2 1   Download

In this paper, we propose a single-step Deep Neural Network (DNN) for CE, termed Iterative Sequential DNN (ISDNN), inspired by recent developments in data detection algorithms. ISDNN is a DNN based on the projected gradient descent algorithm for CE problems, with the iterative iterations transforming into a DNN using the deep unfolding method.

7p vijiraiya 19-05-2025 1 1   Download

This paper presents a new approach to establishing the interior ballistic algorithm for mortar systems based on thermodynamic theory. Contrary to previous studies, the processes that occurred in the ignition charges and the gas mixture properties in the barrel were considered in this study. The numerical integration method has been used to solve the problem with high accuracy.

8p vijiraiya 19-05-2025 1 1   Download

Based on theoretical and practical foundations, combined with methods such as documents analysis and synthesis, surveys using questionnaires, and statistical mathematics, this research evaluates the current status of student sports clubs at Hue University. It identifies the necessity, significance, and importance of developing recreational sports clubs for university students.

6p vimitsuki 06-05-2025 3 1   Download

In this article, we will discuss the use of a database, called Churn Modeling, which collects statistical data from banks. We will also explore the application of the BernoulliNB algorithm, combined with the incremental machine learning method, to process streaming data and analyze and predict customer churn rates in banks.

10p visarada 28-04-2025 1 1   Download

The loss of life in floods is due to both drowning and/or the spread of disease epidemics. The objectives of this study is to focus on estimating appropriate methods and functions for assessing the potential damages to human life in river basin due to floods.

3p vimaito 11-04-2025 1 1   Download

Consumer demand is an important factor in any business, especially in the food retail industry whose products are perishable and have a short life cycle. The daily demand for a food product is affected by external factors, such as seasonality, price reduction and holidays.

8p vifilm 11-10-2024 2 1   Download

This study applies Wavelet analysis to develop a comprehensive method for detecting damage in spiral bevel gears within automotive drive systems. By utilising Wavelet analysis to examine the vibration signals of the gears, it is possible to identify spatial and temporal variations in the signals, thereby detecting signs of damage in the system.

12p vifilm 11-10-2024 5 1   Download

This paper investigates the impact of word embedding techniques on enhancing SMS spam detection models. Traditional statistical methods (BoW, TF-IDF) are compared with advanced techniques (Word2Vec, fastText, GloVe, PhoBERT) using a proprietary dataset.

5p viengfa 28-10-2024 5 2   Download

The study was conducted to determine the level of awareness, behavior and willingness to pay for reusable bags of students at Thai Nguyen University of Economics and Business Administration. We applied Contingent Valuation Method and conducted a survey of 370 students at Thai Nguyen University of Economics and Business Administration.

8p viengfa 28-10-2024 1 1   Download

In this article, analytical, synthesis, and comparative methods are employed to evaluate and provide valuable insights, leading to the proposal of an energy-efficient model and Carbon dioxide emission reduction for Vietnam's tropical islands.

11p viengfa 28-10-2024 4 2   Download

Accurate daily load forecasting is critical for effective energy management planning. In this study, the article proposes a new method for daily load forecasting that takes advantage of load data and weather data over time in Tien Giang.

10p viengfa 28-10-2024 1 1   Download

This article conducts an exhaustive investigation into the utilization of machine learning (ML) methods for forecasting the maximum load capacity (MLC) of circular reinforced concrete columns (CRCC) using Fiber-Reinforced Polymer (FRP). Extreme Gradient Boosting (XGB) algorithm is combined with novel metaheuristic algorithms, namely Sailfish Optimizer and Aquila Optimizer, to fine-tune its hyperparameters.

18p viengfa 28-10-2024 2 2   Download

Buckling and postbuckling behaviors of porous functionally graded graphene platelets-reinforced composite (porous FG-GPLRC) cylindrical shells with stiffeners subjected to external pressures are presented in this paper. Three distribution types of porosity in the shells are considered. The smeared technique for stiffeners is employed to model the mechanical behaviors of the stiffened shells.

13p viengfa 28-10-2024 5 2   Download

The auxiliary parts of the impact test hammer are only suitable for certain cases. The impact velocity of other cases are determined by measuring. Instead of measuring multiple times, the hammer velocity calculating method and program is suggested by this article for general cases and the input parameters will be changed for the other cases. The calculation results are verified by using a high speed camera to measure the hammer velocity.

9p viyuhi 26-03-2025 4 1   Download

The article presents a model and derives analytical expressions for Helmholtz free energy, the nearest neighbor distance, isothermal compressibility, the thermal expansion coefficient, the heat capacities at constant volume and constant pressure as functions of temperature, concentration of interstitial atoms, and film’s thickness for an interstitial binary alloy with a BCC structure based on the statistical moment method (SMM).

16p viaburame 14-03-2025 2 1   Download

This paper proposes an advanced method for recognizing learners' emotions by incorporating the use of emojis to reflect the modern communication tendencies of learners, typically young individuals.

11p viaburame 14-03-2025 3 1   Download

This study aims to generate the system of histone deacetylase enzymes (HDAC) with its cofactor zinc ion using two different parameter models and application of molecular dynamic (MD) study for structure of HDAC2 and vorinostat ligand. Materials and methods: Two non-bonded models, including 12-6-4 Lennard-Jones and cationic dummy atom, were applied for building a solvation system of HDAC2 crystal structure with presence of suber-anilohydroxamic acid (SAHA) and zinc ion.

9p vihyuga 04-03-2025 4 1   Download

This paper demonstrates that, using multiple data points around each gateway allows for the creation of accurate coverage heat maps by using a proposed LoRaWAN coverage estimation algorithm. This method effectively identifies areas with varying signal strength across Da Nang City, highlighting where additional gateways are needed to improve network reliability.

6p vihyuga 20-02-2025 17 1   Download

This paper presents methods for controlling a real model using the S7-400 controller with SCL language (Structured Control Language). The two controllers designed are the hybrid Neural Network Neural-PID (Proportional Integral Derivative) controller and the RBF (Radial Basis Function)- PID controller.

9p viyamanaka 06-02-2025 5 1   Download