What Is a Z Tranche? Pros, Cons, and Illustrative Example

A Z tranche is part of a collateralized mortgage obligation and receives payments after more senior tranches are paid off. Learn about its advantages and disadvantages.
IEEE

Speeding up Composite Power System Reliability Evaluation via Efficient Random Line Importance Sampling Combined with Cross-Entropy Method

Abstract: Composite power system reliability evaluation using Monte Carlo simulation often suffers from high computational cost due to the difficulty in capturing rare loss-of-load states. To address ...

Simple vs. Stratified Random Sampling: Key Differences Explained

Learn the distinctions between simple and stratified random sampling. Understand how researchers use these methods to accurately represent data populations.
IEEE

Improved Ratio Estimator under Stratified Simple Random Sampling Using Auxiliary Variable

Abstract: In this study, we suggested an improved ratio estimator for stratification utilizing an auxiliary variable in simple random sampling. Theoretically, bias ...
Open Heart

HIV infection is independently associated with carotid plaque burden and echogenic characteristics

Background People living with HIV (PWH) are at increased risk of cardiovascular disease; however, evidence from Asian populations remains limited. We evaluated the prevalence and characteristics of ...
Dig It With Raven on MSN

Archaeological sampling - How sites are studied without digging everything

Sampling allows archaeologists to draw conclusions about a site or region using only a fraction of the area. Because excavation is destructive and funding is limited, leaving parts unexcavated can be ...
The Manila Times on MSN

Duterte ahead in early presidential poll

MANILA, Philippines — Vice President Sara Duterte posted a 16-point lead over Naga City Mayor Leni Robredo in the latest ...