30 citations · 64 across the 14 of their papers we have counts for
14 papers
An approximate zero bias transformation for random sums: Applications to sampling with outliers, auto insurance, and generative AI
Wasamon Jantai, Nathakhun Wiroonsri
We develop bounds for the difference between a test function of a random sum and a standard normal random variable, where the summands are assumed to be independent but not n…
4TaStiC: Time and trend traveling time series clustering for classifying long-term type 2 diabetes patients
Onthada Preedasawakul, Nathakhun Wiroonsri
Diabetes is one of the most prevalent diseases worldwide, characterized by persistently high blood sugar levels, capable of damaging various internal organs and systems. Diabetes p…
Ranked differences Pearson correlation dissimilarity with an application to electricity users time series clustering
Chutiphan Charoensuk, Nathakhun Wiroonsri
Time series clustering is an unsupervised learning method for classifying time series data into groups with similar behavior. It is used in applications such as healthcare, finance…
A Bayesian cluster validity index
Nathakhun Wiroonsri, Onthada Preedasawakul
Selecting the appropriate number of clusters is a critical step in applying clustering algorithms. To assist in this process, various cluster validity indices (CVIs) have been deve…
A correlation-based fuzzy cluster validity index with secondary options detector
Nathakhun Wiroonsri, Onthada Preedasawakul
The optimal number of clusters is one of the main concerns when applying cluster analysis. Several cluster validity indexes have been introduced to address this problem. However, i…
The Expected Values of Hosoya Index and Merrifield-Simmons Index of Random Hexagonal Cacti
Moe Moe Oo, Nathakhun Wiroonsri, Natawat Klamsakul +2
Hosoya index and Merrifield-Simmons index are two well-known topological descriptors that reflex some physical properties, boiling point or heat of formation for instance, of bezen…
Normal approximation for fire incident simulation using permanental Cox processes
Dawud Thongtha, Nathakhun Wiroonsri
Estimating the number of natural disasters benefits the insurance industry in terms of risk management. However, the estimation process is complicated due to the fact that there ar…
Concentration inequalities using approximate zero bias couplings with applications to Hoeffding's statistic under the Ewens distribution
Nathakhun Wiroonsri
We prove concentration inequalities of the form for a random variable with mean zero and variance using a coupling technique from Stein's met…
Do elderly want to work? Modeling elderly's decision to fight aging Thailand
Krittiya Kantachote, Nathakhun Wiroonsri
Thailand has entered into an aging society since the year 2000. Using the 2017 Survey of the Older Persons in Thailand collected by Thailand National Statistical Office, this study…
Clustering performance analysis using a new correlation-based cluster validity index
Nathakhun Wiroonsri
There are various cluster validity indices used for evaluating clustering results. One of the main objectives of using these indices is to seek the optimal unknown number of cluste…
Normal approximation for associated point processes via Stein's method with applications to determinantal point processes
Nathakhun Wiroonsri
We use Stein's method to provide non asymptotic bounds to the normal for functionals of associated point processes. As for supporting tools, we use the connection between ass…
Stein's method for negatively associated random variables with applications to second order stationary random fields
Nathakhun Wiroonsri
Let be a negatively associated mean zero random vector with components that obey the bound , and whose sum $W = \sum_{i=1…
Stein's method using approximate zero bias couplings with applications to combinatorial central limit theorems under the Ewens distribution
Nathakhun Wiroonsri
We generalize the well-known zero bias distribution and the -Stein pair to an approximate zero bias distribution and an approximate -Stein pair, respectively. Berry Esseen…
Stein's method for positively associated random variables with applications to the Ising and voter models, bond percolation, and contact process
Larry Goldstein, Nathakhun Wiroonsri
We provide non-asymptotic bounds to the normal for four well-known models in statistical physics and particle systems in ; the ferromagnetic nearest-neighbor Is…