P-term Strings and Semi-local Strings

A Fast and Accurate Global Maximum Power Point Tracking Method for Solar Strings under Partial Shading Conditions

This paper presents a model-based approach for the global maximum power point (GMPP) tracking of solar strings under partial shading conditions. In the proposed method, the GMPP voltage is estimated without any need to solve numerically the implicit and nonlinear equations of the photovoltaic (PV) string model. In contrast to the existing methods in which first the locations of all the local pe...

The Analytic Technique and Experimental Research Methods of Post-buckling about Slender Rod Strings in Wellbore

The buckling behavior of rod strings in wellbore is one of the key issues in petroleum engineering. The slender rod strings in vertical wellbore were selected as research objects. Based on the energy method, the critical load formulas of sinusoidal and helical buckling were derived for the string with the bottom of the wellbore pressure. According to the sinusoidal and helical buckling’s geomet...

The Investigation of Anti-bacterial Activity of Holothuria Leucospilota Sea Cucumber Extracts (Body Wall, Guts and White Strings) at Chabahar Bay in Oman Sea

Echinoderms are independent and quite special branch of world animals. Sea cucumbers are among the strangest members of echinoderm class regarding their structure and physiology. These fauna have been tested with regard to anti-bacterial, anti-fungal, anti-coagulants, anti-virus, cytotoxic, hemolytic and anti-HIV features. In this study, the antibacterial activity of Holothuria leucospilota...

Propagation of Particles and Strings in One-Dimensional Universe

We review the basics of the dynamics of closed strings moving along the infinite discretized line ZZ. The string excitations are described by a field φx(τ) where x ∈ ZZ is the position of the string in the embedding space and τ is a semi-infinite “euclidean time” parameter related to the longitudinal mode of the string. Interactions due to splitting and joining of closed strings are taken into ...

Study on Linear Density Effect on the Vibration Behavior of Textile Strings Using Video Processing