Numerical integration aspects of a nutrient utilization ecological problem

1974 ◽  
pp. 167-182 ◽  
Author(s):  
D. B. Frazho ◽  
W. F. Powers ◽  
R. P. Canale
Keyword(s):  
Numerical Integration ◽  
Nutrient Utilization ◽  
Ecological Problem

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

NUMERICAL INTEGRATION IN THE PRESENCE OF SINGULARITIES

1981 ◽  
Vol 1 (1) ◽  
pp. 83-85 ◽  
Author(s):  
Moran P.A.P.
Keyword(s):  
Numerical Integration

SIRTF Controller Simulation: Instability Masked by Numerical Integration

1988 ◽  
Author(s):  
N. Rajan ◽  
F. J. Alexandro ◽  
J. Hirata
Keyword(s):  
Numerical Integration

The Role of the Caecum in Nutrient Utilization by the Pig

1958 ◽  
Vol 17 (3) ◽  
pp. 684-692 ◽  
Author(s):  
L. E. Lloyd ◽  
D. G. Dale ◽  
E. W. Crampton
Keyword(s):  
Nutrient Utilization

A Modified Algorithm for Reduction of Error in Combined Numerical Integration

2019 ◽  
Vol 51 (04) ◽  
pp. 745-750
Author(s):  
A.A BHATTI ◽  
M.S CHANDIO ◽  
R.A MEMON ◽  
M.M SHAIKH
Keyword(s):  
Numerical Integration ◽  
Modified Algorithm

Nutrients demand of cactus forage

2019 ◽  
Author(s):  
João Macedo Moreira ◽  
Aldrin Martin Pérez-Marin ◽  
Jucilene Silva Araújo ◽  
George Rodrigues Lambais ◽  
Aldo Sales
Keyword(s):  
Block Design ◽  
Nutrient Utilization ◽  
Nutrient Recovery ◽  
Fertilizer Treatment ◽  
Treatment Control ◽  
Mineral Fertilization ◽  
Randomized Block Design ◽  
Nutrient Use ◽  
Different Types ◽  
Semi Arid Region

The study aimed to evaluate the efficiency of nutrient use in three cactus forage (CF) cultivars (Opuntia stricta and Nopalea cochenillifera), 365 days after planting under different types of fertilizer in two research sites (Condado and Riachão) of the semi-arid region of Paraiba state, Brazil. The experimental design was a randomized block design with treatments in a factorial scheme (3×4), three cultivars of CF (Orelha de elefante Mexicana; Miúda; Bahiana), and four fertilizer treatment (Control; Manure; Manure with Nitrogen; Mineral fertilization) with four replications. The CF cultivars did not differ significantly in nutrient use. That means of physiological efficiency by CF cultivars were 1.62, and 2.36 kg of biomass per kg of nutrient applied in Condado and Riachão, respectively. The efficiency of nutrient recovery was 16% for the Condado, according the following order: K> P> Ca> N> C = Mg and 12% for Riachão: K> P> N> C = Ca = Mg. In the two research sites, the treatment with mineral fertilization significantly increased the efficiency use of N, P and K in comparison to the other treatments. The average for efficiency of nutrient utilization was 25% and 19% for Condado and Riachão, respectively, in the following order for Condado: K> P> N> Ca = Mg> C, and Riachão: K> P> N> C> Mg = Ca. In a CF production system aiming to obtain a yearly harvest cycle, it is necessary to replenish of K and P to maintain the nutritional balance between the soil and CF plant.

Solving Numerical Integration Based on Evolution Strategy Method

2009 ◽  
Vol 31 (2) ◽  
pp. 196-206 ◽  
Author(s):  
Yong-Quan ZHOU ◽  
Ming ZHANG ◽  
Bin ZHAO
Keyword(s):  
Numerical Integration ◽  
Evolution Strategy ◽  
Strategy Method
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