Results 21 to 30 of about 157,396 (310)

Formula for permeability coefficient of coarse-grained soil based on parameters of two-dimensional fractal gradation model

open access: yesYantu gongcheng xuebao, 2023
The coarse-grained soil is widely distributed in nature and used in engineering. The permeability is one of its key properties, and for the same type of coarse-grained soil, its permeability is almost determined by the grain-size distribution and the ...
QU Shizhang 1, LIU Xiaoming 1, LI Li 1, 2, CHEN Renpeng 1, 2
doaj   +1 more source

A modified formula for calculating low-density lipoprotein cholesterol values

open access: yesLipids in Health and Disease, 2010
Background The Friedewald formula (FF) is useful for calculating serum low-density lipoprotein cholesterol (LDL-C) values, but has a remarkable deviation and limitation especially in hypertriglyceridemia.
Chen Bin   +8 more
doaj   +1 more source

An Exact Formula for Calculating Inverse Radial Lens Distortions

open access: yesSensors, 2016
This article presents a new approach to calculating the inverse of radial distortions. The method presented here provides a model of reverse radial distortion, currently modeled by a polynomial expression, that proposes another polynomial expression ...
Pierre Drap, Julien Lefèvre
doaj   +1 more source

The feasibility analysis of calculating proptosis by simple Heron's formula.

open access: yesPLoS ONE, 2020
PurposeWe propose a new method to calculate proptosis by using the simple Heron's formula and analyze its feasibility.MethodIt was a none-inferiority trial. The registration number was ChiCTR1900026490.
Weili Zhang   +3 more
doaj   +1 more source

Calculation of the Gamma Function by Stirling's Formula [PDF]

open access: yesMathematics of Computation, 1971
In this paper, we derive a simple error estimate for the Stirling formula and also give numerical coefficients.
openaire   +1 more source

For Calculating Osmolality, the Simplest Formula is the Best [PDF]

open access: yesAnaesthesia and Intensive Care, 1987
Plasma osmolalities were measured in 100 normal, 100 general hospital and 100 intensive care patients, and compared with the osmolalities calculated from the plasma concentrations of sodium, potassium, glucose and urea, using five different published formulae.
L I, Worthley, M, Guerin, R W, Pain
openaire   +2 more sources

Calculating intraocular lens power in anterior megalophthalmos: A case report

open access: yesFrontiers in Medicine, 2022
IntroductionWe report a case of a man with cataract and anterior megalophthalmos (AM), in which some myopia was retained when calculating intraocular lens (IOL) power using the Haigis formula to avoid postoperative farsightedness.Case descriptionA 59 ...
Jiancheng Mu   +3 more
doaj   +1 more source

Exploration and Practice of a New Formula for Calculating the Degree of Freedom

open access: yesMATEC Web of Conferences, 2018
The current “structural mechanics” in the textbook, the more sub items in the formula of calculating degrees of freedom, is not conducive for the students to master the understanding and calculation of degree of freedom concept.
Yangxiaochi
doaj   +1 more source

Uplift stability of narrow foundation pits based on Prandtl formula

open access: yesYantu gongcheng xuebao, 2019
Drilled piles and internal supporting structures are widely used at present especially in the foundation pit supporting works of municipal industry. The traditional uplift stability analysis method based on the the Prandtl formula for calculating the ...
CHEN Yan-ping
doaj   +1 more source

Calculation of Nonlinear Stiffness of Rubber Pad under Different Temperatures and Prepressures

open access: yesShock and Vibration, 2020
The static stiffness of rubber springs is affected by temperature and prepressure. In this thesis, the relationship between Young’s modulus and temperature of rubber was studied, and the quantitative relationship between them was determined.
Chuanbo Xu   +3 more
doaj   +1 more source

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