The health of the landing gear retraction/extension(R/E) hydraulic system may be assessed using fuzzy comprehensive evaluation (FCE), however traditional FCE method depends solely on human assessment by specialists, which is excessively subjective. To address issue excessive subjective variables in assessment, an improved model based enhanced risk coefficient provided, includes four considerati...

[1] Hydraulic tomography is a cost-effective technique for characterizing the heterogeneity of hydraulic parameters in the subsurface. During hydraulic tomography surveys a large number of hydraulic heads (i.e., aquifer responses) are collected from a series of pumping or injection tests in an aquifer. These responses are then used to interpret the spatial distribution of hydraulic parameters o...

INTRODUCTION: The calculation of Manning n values has been of interest since the Manning equation was presented in the late 1800s (Henderson, 1966). While estimation of n vahm for normal channels has been fairly well standardized, the estimation of n values in areas of dense vegetation continues to be subject to large variations depending on the experience of the engineer and the perceived dens...

This article examines the issues of hydraulic resistance solar air heaters with concave tubes and reduction pressure losses, as well determination flow in installed working chamber heater discusses number common to reduce losses installation pipes give a swirling motion eliminate sharp decrease heat transfer process

Background: With one in every 108 Americans behind bars, the deinstitutionalization of prisons is a pressing issue for all those facing the daunting challenges of successfully reintegrating ex-offenders into both their communities and the larger society. Given the strong evidence that treatment services, such as mental/behavioral health, alcohol/substance abuse, and primary healthcare may reduc...

Trees face the dilemma that achieving high plant productivity is accompanied by a risk of drought-induced hydraulic failure due to a trade-off in the trees' vascular system between hydraulic efficiency and safety. By investigating the xylem anatomy of branches and coarse roots, and measuring branch axial hydraulic conductivity and vulnerability to cavitation in 4-year-old field-grown aspen plan...

Hydraulic fracturing is an important method of reservoir stimulation in the exploitation of geothermal resources, and conventional and unconventional oil and gas resources. In this article, hydraulic fracturing experiments with shale, sandstone cores (from southern Sichuan Basin), and granite cores (from Inner Mongolia) were conducted to investigate the different hydraulic fracture extension pa...