نتایج جستجو برای: penetration index
تعداد نتایج: 430530 فیلتر نتایج به سال:
––The performance of pavements depends to a large extent on the strength and stiffness of the subgrades. Subgrade strength (CBR) plays a major role in pavement design. Since determination of CBR value in field requires need of equipment and also time consuming alternatively one can be predict CBR value of subgrade in field from other soil support tests namely Dynamic Cone Penetrometer Index (DC...
a r t i c l e i n f o Keywords: Airborne lidar Leaf area index Urban ecosystem analysis Hemispherical photography Allometry Vegetation structure In urban areas, leaf area index (LAI) is a key ecosystem structural attribute with implications for energy and water balance, gas exchange, and anthropogenic energy use. In this study, we estimated LAI spatially using airborne lidar in downtown Santa B...
This paper investigates and analyses the best practices followed by various countries worldwide for supporting the broadband growth. The methodology used to locate the best practices is based on three main steps: (a) the presentation of the main factors that have a major impact on broadband growth; (b) the definition of what is a “best practice” based on quantitative criteria; (c) the calculati...
One of the most valid and efficient models of long rod projectile penetration in homogeneous targets is Tate and Alekseevskii’s (A&t) model. Based on Tate’s model, the present research tries to calculate the optimum speeds to achieve the maximum penetration depth in the homogeneous targets. The proposed collision speed-penetration depth diagrams are developed using Tate’s model. In this way, va...
Mollisols of Santa Fe have different tilth and load support capacity. Despite the importance of these attributes to achieve a sustainable crop production, few information is available. The objectives of this study are i) to assess soil physical indicators related to plant growth and to soil mechanical behavior; and ii) to establish relationships to estimate the impact of soil loading on the soi...
BACKGROUND Despite the clinical improvements attributed to noninvasive ventilation (NIV) during asthma crises, and the well established effects of nebulization, there are few studies on the effects of these interventions together. We hypothesized that nebulization coupled to NIV should raise radio-aerosol pulmonary deposition in asthmatics. The aims of this study were to assess the effects of c...
The paper addresses the question of how digital access is related to preference for financial services. purpose research was reveal main types interrelationships between and by dividing comparing countries with different corresponding characteristics. hypothesis suggested a negative correlation would exist penetration traditional To test this hypothesis, data from advanced developing markets we...
Most of the roads in Iraq are paved using Hot Mix Asphalt (HMA) which is consisted aggregates, asphalt cement and filler. In this study a laboratory investigation conducted two types widely used fillers highly locally available. Four different proportions are. Filler four proportion (i.e., 1.9%, 2.5%, 3.5%, 4.5%) by total weight aggregate for both used. These were blended with penetration 40/50...
The determination of liquefaction potential is required to take into account a large number of parameters, which creates a complex nonlinear structure of the liquefaction phenomenon. The conventional methods rely on simple statistical and empirical relations or charts. However, they cannot characterise these complexities. Genetic algorithms are suited to solve these types of problems. A genetic...
Abstract With the rapid increase of distributed photovoltaic (DPV) generations, static voltage stability (SVS) distribution network (DN) is faced with more and challenges. Considering characteristics DPV structure, an appropriate index (SVSI) in medium-voltage DN studied this paper. In terms limitation traditional SVSI that only reflects load change, based on P-V curve, a novel change rate - (M...
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