نتایج جستجو برای: maximum dry density
تعداد نتایج: 766260 فیلتر نتایج به سال:
Given a sequence A of numbers and two positive integers and k, we study the problem to find k disjoint segments of A, each has length at least , such that their sum of densities is maximized. We give the first known polynomial-time algorithm for the problem: For general k, our algorithm runs in O(n k) time. For the special case with k = 2 (respectively, k = 3), we also show how to solve the pro...
We present the first speleothem-derived central North Africa rainfall record for the last glacial period. The record reveals three main wet periods at 65-61 ka, 52.5-50.5 ka and 37.5-33 ka that lead obliquity maxima and precession minima. We find additional minor wet episodes that are synchronous with Greenland interstadials. Our results demonstrate that sub-tropical hydrology is forced by both...
The marked biogeographic difference between western (Malay Peninsula and Sumatra) and eastern (Borneo) Sundaland is surprising given the long time that these areas have formed a single landmass. A dispersal barrier in the form of a dry savanna corridor during glacial maxima has been proposed to explain this disparity. However, the short duration of these dry savanna conditions make it an unlike...
Methods for improving the basic kernel density estimator include variable locations, variable bandwidths (often called variable kernels) and variable weights. Currently these methods are implemented separately and via pilot estimation of variation functions derived from asymptotic considerations. In this paper, we propose a simple maximum likelihood procedure which allows (in its greatest gener...
Morphologically controlled synthesis of ferric oxide nano/micro particles has been carried out by using solvothermal route. Structural characterization displays that the predominant morphologies are porous hollow spheres, microspheres, micro rectangular platelets, octahedral and irregular shaped particles. It is also observed that solvent has significant effect on morphology such as shape and s...
یکی از مهمترین علت های ایجاد کننده درد، اختلالات اسکلتی-عضلانی می باشد، که حدود یک سوم آنها دارای سندرم میوفاشیال همراه با نقاط ماشه ای می باشند. وجود نقطه ماشه ای در عضله تراپز فوقانی یکی از یافته های شایع در افراد مبتلا به اختلالات ناحیه گردن و پشت است. اخیرا استفاده از dry needling به عنوان یکی از روشهای جدید درمانی جهت درمان نقاط ماشه ای مطرح شده است. هدف از این مطالعه بررسی اثرات دو روش در...
A field experiment was conducted for two consecutive years (2003 and 2004) to study the effect of row spacing (75, 65 and 55cm) and different weed competition durations (0, 15,30,45,60 days after emergence and throughout the growth period) on weeds density and biomass and growth and yield of maize. Reducing row spacing significantly suppressed the weed density and biomass. The maximum reduction...
The effects of traffic frequency and skid trail slope on dry bulk density, litter mass and rutting are examined. Treatments included a combination of four different traffic frequencies (3, 7, 14, and 20 passes of a rubber skidder) and three levels of slope ( 20%.) The results showed that dry bulk density, rut depth and soil displacement increased with the increase of traffic frequency and slop...
The particle size distribution of output material is affected by type of crusher used .The demolition debris of particle size less than 37.5 mm. The inclusion of upto 15% of particle larger than 37.5 mm should not alter density significantly. Water absorption of coarse and fine particle of crushed brick aggregates passing 19 mm 4.75 mm respectively and retaining on 4.75 mm are 6.15 % and 6.20 %...
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