Department of Mathematics: Recent submissions
Now showing items 21-40 of 4429
-
Algoritma Genetika Hibrid pada Permasalahan Optimasi Portofolio Dinamis
(Universitas Sumatera Utara, 2025)Dynamic portfolio optimization is a crucial problem in evolving financial markets, requiring investment decisions to be adjusted over time. Traditional methods such as Linear Programming (LP) and Quadratic Programming ... -
Perpindahan panas pada Fluida Non-Newton
(Universitas Sumatera Utara, 2021)Non-Newtonian fluids exhibit behaviour deviating from Newton’s law. In Sisko fluid flow, which is a non-Newtonian fluid, within pipes, the relationship between shear stress magnitude and shear strain becomes linear as ... -
Teori Permainan Fuzzy dalam Menentukan Strategi Pemasaran Optimum pada Shopee, Lazada dan Tokopedia
(Universitas Sumatera Utara, 2025)The rapid advancement of the times has resulted in every human activity being inseparable from technology. Various new technologies are emerging in every field of life. One of the rapidly developing technologies is electronic ... -
Optimasi Parameter Tuning pada Model Regresi Logistik Lasso
(Universitas Sumatera Utara, 2025)This study examines the optimization of the C parameter defined as the inverse of λ in the LASSO logistic regression model by comparing three cross-validation methods: KFold, Stratified KFold (SKF), and Repeated ... -
Pencarian Nilai Minimum dengan Dua Dimensi pada Algoritma Gauss Newton
(Universitas Sumatera Utara, 2015)Gauss-Newton algorithm is an iterative method used in solving the non-linear least- squares. As is known Gauss Newton algorithm does not always work forever, it can sometimes show weak to convergence rate. In this problem, ... -
Pemodelan Prevalensi Stunting di Indonesia Menggunakan Metode Regresi Nonparametrik Spline Truncated (Studi Kasus: Data BPS Tahun 2023)
(Universitas Sumatera Utara, 2025)Regression analysis is a statistical method used to determine the pattern of relationship between one variable and another. When the shape of the regression curve is unknown, nonparametric regression is used. One approach ... -
Perbandingan Performa Algoritma K-Means dan DBSCAN dalam Clustering pada Data Berdimensi Tinggi
(Universitas Sumatera Utara, 2025)Clustering is one of the essential techniques in data analysis for discovering hidden patterns and grouping data based on certain similarities. However, the application of clustering algorithms to high-dimensional data ... -
Analisis Kinerja Metode Fuzzy Mamdani dalam Meramalkan Intensitas Curah Hujan di Kota Medan
(Universitas Sumatera Utara, 2025)Indonesia is a tropical country with two main seasons, namely the dry season and the rainy season. Rainfall in a region is influenced by various meteorological factors such as air temperature, humidity, duration of sunshine, ... -
Model Multi-Objektif Transportasi Umum dengan Adanya Transfer
(Universitas Sumatera Utara, 2017)An important element in the process of public transportation planning is the development of the concept of a path, so far the model in this study aims to minimize the cost as well as the number of transfers in public ... -
Implementasi Metode Autoregressive Integrated Moving Average (ARIMA) dalam Prakiraan Nilai Ekspor di Sumatera Utara
(Universitas Sumatera Utara, 2025)Export value is an important indicator in the economy because it has a direct impact on economic growth, trade balance stability, and international competitiveness. Export value estimates help the government and business ... -
Analisis Perbandingan Penerapan Logika Fuzzy Menggunakan Metode Sugeno dan Tsukamoto dalam Prakiraan Cuaca di Kota Medan
(Universitas Sumatera Utara, 2025)This study aims to compare the Sugeno and Tsukamoto methods applied in weather forecasting using Fuzzy Logic. The input variables include air temperature, humidity, sunlight duration, and wind speed, while the output ... -
Automorfisma Graf Kupu-kupu
(Universitas Sumatera Utara, 2025)An automorphism of a graph G is an isomorphism of the graph G to itself, which is a bijective mapping that preserves adjacency between the vertices in the graph G. This study focuses on the generalized butterfly graph, ... -
Analisis Perbandingan Penerapan Logika Fuzzy Menggunakan Metode Sugeno dan Tsukamoto dalam Prakiraan Cuaca di Kota Medan
(Universitas Sumatera Utara, 2025)This study aims to compare the Sugeno and Tsukamoto methods applied in weather forecasting using Fuzzy Logic. The input variables include air temperature, humidity, sunlight duration, and wind speed, while the output ... -
Analisis Sensitivitas Perbandingan Metode WASPAS, SAW, dan TOPSIS dalam Pemilihan Produk Mobil Toyota SUV
(Universitas Sumatera Utara, 2025)The selection of vehicles, especially Sport Utility Vehicles (SUVs), is becoming increasingly complex due to the variety of options and diverse consumer preferences. This research aims to compare three Multi-Criteria ... -
Studi Perbandingan Akurasi Metode Perangkingan MCDM dalam Evaluasi Tingkat Pendidikan Kabupaten/Kota di Sumatera Utara
(Universitas Sumatera Utara, 2025)North Sumatra Province faces significant challenges in achieving equitable education quality across its regencies and cities. A systematic evaluation of education levels is essential to identify regions that require special ... -
Penerapan Regresi Data Panel Pada Model Produk Domestik Regional Bruto Sumatera Utara Tahun 2020-2023
(Universitas Sumatera Utara, 2025)Panel data regression is a method that combines cross section data and time series data, cross section data is data collected at a certain time from many observation units, while time series data is data collected from one ... -
Estimasi Parameter Least Absolute Shrinkage and Selection Operator (Lasso) Menggunakan Parameter Cyclic Coordinate Descent
(Universitas Sumatera Utara, 2025)Least Absolute Shrinkage and Selection Operator (Lasso) regression is one method that can overcome multicollinearity problems by shrinking some regression coefficients to exactly zero. Cyclic Coordinate Descent algorithm ... -
Perbandingan Tingkat Akurasi antara Support Vector Machine (SVM) Menggunakan Kernel Polinomial & Kernel Radial Basis Function (RBF) Untuk Klasifikasi Penyakit Polycystic Ovary Syndrome (PCOS)
(Universitas Sumatera Utara, 2025)Polycystic Ovary Syndrome (PCOS) is a hormonal disorder that is common in women of reproductive age. Early diagnosis of PCOS is very important to prevent long-term complications. In this study, the author classified PCOS ... -
Prediksi Tingkat Intensitas Resiko Selama Kehamilan Dengan Regresi Logistik Ordinal
(Universitas Sumatera Utara, 2025)Ordinal logistik regression is an analytical method used to determine the relationship between a response variable and predictor variables, where the response variable is ordinal-scaled, consisting of three or more categories ... -
Automorfisma Graf Kipas Angin
(Universitas Sumatera Utara, 2025)This study discusses automorphisms in fan graphs, which are formed by combining a friendship graph Fn and a path graph pm, with one of the end vertices in the path graph pm directly connected to the central vertex of ...