نتایج جستجو برای: rollover stability
تعداد نتایج: 300735 فیلتر نتایج به سال:
Traffic crash risk assessments should incorporate appropriate exposure data. However, existing US nationwide crash data sets, the NASS General Estimates System (GES) and the Fatality Analysis Reporting System (FARS), do not contain information on driver or vehicle exposure. In order to obtain appropriate exposure data, this work estimates vehicle miles driven (VMD) by different drivers using th...
A set of state-of-the-art FE vehicle, restraint system, dummy, and whole body human models was constructed and validated against several sets of quasi-static and dynamic rollover tests. HIII dummy responses during three selected trip-over scenarios were simulated using an FE vehicle model equipped with four different roof stiffness values. It was found that the high dummy head accelerations and...
BACKGROUND Circulating endothelial cells (CECs) and E-selectin are known as sensitive and specific markers of endothelial dysfunction. This study investigated whether CECs and E-selectin are surrogate biomarkers of preeclampsia and if measurement of CECs and E-selectin, early in the third trimester, could be a means of predicting preeclampsia. METHODS In this prospective, descriptive-analytic...
A Tuk-tuk, also known as a motorized tricycle, is three-wheeled vehicle with wheels symmetrically arranged in the longitudinal driving direction. Compared to four-wheeled vehicles, tuk-tuks have less stability. Classical Tuk-tuks typically metal occupant compartment without doors, resulting direct contact between occupants and structure. In tropical countries heavy rainfall, flooded roads are c...
When releasing a new version of durable product, firm aims to attract customers as well persuade its existing customer base upgrade. This is commonly achieved through rollover strategy, which comprises the price product decision discontinue sale (solo rollover) or sell at discounted (dual rollover). In this study, we argue that timing release an important—but overlooked—third lever in design su...
The research activity of the unit of Sassari is focalized on the synthesis, characterization and applications of cyclometalated complexes of transition metals, specifically noble metals. The applications concern especially the use of these complexes as catalysts, as potential biological agents and, finally, as models for the activation and functionalization of C-H bonds. In particular, our atte...
A study pointed out that the delay time of driver's nervous system has a significant effect on roll stability vehicle. However, existing researches vehicle rollover prevention control rarely consider influence driver factors stability. Aiming at this problem, and path tracking strategy considering in loop is proposed to assist different types drivers. It includes supervisory decision layer exec...
In this paper we present an adaptive controller implementation based on the multiple models, switching, and tuning (MMST) paradigm [13, 14, 15] for preventing un–tripped rollover in automotive vehicles. Our approach relies on differential-braking to keep the value of the Load Transfer Ratio (LT R) below a threshold. We first employ multiple models to infer the unknown center of gravity height a...
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