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Stochastic stability of the discrete-time constrained extended Kalman filter
Extended Kalman filter constrained Kalman filter stochastic stability
2010/3/17
In this paper, stability of the projection-based constrained discrete-time extended Kalman filter (EKF) as applied to nonlinear systems in a stochastic framework has been studied. It has been shown th...
STABILITY AND FLUCTUATIONS IN A THREE SPECIES SYSTEM: A PLANT WITH TWO VERY DIFFERENT POLLINATORS
Pollination mutualism population dynamics competition mathematical models
2010/3/26
We present a multi-species model of one plant with two nectivore pollinators. This system has
mutualism between the plant and the pollinators, and competition for food between pollinators. Both polli...
溶剂替换法制备β-胡萝卜素纳米粒子与稳定性（Preparation of β-carotene Nanodispersions by Solvent Displacement Technique and Their Stability）
β-胡萝卜素 纳米粒子 粒径
2009/5/22
采用溶剂替换法制备β-胡萝卜素纳米粒子，通过考察4种乳化剂对制备纳米粒子粒径及分布的影响和测定贮藏过程中粒子粒径和β-胡萝卜素含量变化，研究了其稳定性。试验结果表明：以酪蛋白钠为乳化剂制备的β-胡萝卜素纳米粒子粒径大于以Tween 20、蔗糖脂肪酸酯和月桂酸十甘油酯为乳化剂制备的纳米粒子；向蔗糖脂肪酸酯中添加酪蛋白钠，以此混合物作为乳化剂可以制备平均粒径小于50nm的β-胡萝卜素纳米粒子；贮藏过程...
The Effect of Ascorbic Acid and Sodium Stearoyl -2- Lactylate on Frozen Dough Stability
Ascorbic Acid Sodium Stearoyl -2- Lactylate Frozen Dough Stability
2009/1/16
The present study consitst of two parts of research. In the first part, the effect of varying doses of ascorbic acid (AA-0, 75 and 125 ppm) and sodium stearoyl -2- lactylate (SSL-0, 0.5 %) used in fro...
Aggregate water stability of sandy and clayey loam soils differently compacted with and without wheat plants
soils texture roots compaction aggregation
2008/11/26
The objectives of our studies were to: 1) estimate the effects of compaction of sandy loam and clayey loam soils on growth parameters of winter wheat plants, 2) evaluate the resilien- ce capacity of t...
Changes in pore size distribution and aggregate stability of two soils under long term tillage systems
tillage systems bulk density pore size distribution aggregate stability
2008/11/26
Tillage-induced changes in pore-size distribution and aggregate stability of two soils were investigated for 7 con- secutive years from 1994 to 2000. The three tillage treatments were used: convention...
Characterisation of soil aggregate stability by ultrasonic dispersion
ultrasonic dispersion soil aggregate stability soil particle dispersion
2008/11/24
Ultrasonic soil aggregate stability (USAS) of 5 European soils was investigated in ultrasonic dispersion tests, studying mass fractions of macroaggregates at different absorbed specific energy levels....
Some factors affecting clay dispersion and aggregate stability in selected soils of Nigeria
aggregate stability aggregated clay chemical extractants tropics water-dispersible clay
2008/11/24
Using 22 soil samples from Nigeria, comprising Alfisols, Entisols, Inceptisols, Ultisols and Vertisols with 77- 676 g kg-1 clay, we studied the effect of various treatments on clay dispersion. Aggrega...
Effect of management practices on soil organic matter, microbial biomass and aggregate stability of Orthic Luvisol
management practice organic matter microbial biomass aggregation
2008/11/21
Because of the importance of soil organic matter (SOM) and wet aggregate stability (WAS) on soil quality, the maintenance of satisfactory levels of these parameters is an integral component of soil m...
Effects of herbicides, lucerne meal, and zinc on microbial activity and aggregate stability of soils
aggregate stability microbial activity herbicides zinc lucerne meal
2008/11/21
In laboratory experiments aggregates (1-2 mm) of a loamy colluvial soil and a silty luvisol soil were treated with the herbicides Gramoxone and Goltix WG, the active agent of Goltix WG Metamitron, luc...
Effects of herbicides, lucerne meal, and zinc on microbial activity and aggregate stability of soils
aggregate stability microbial activity herbicides zinc lucerne meal
2008/11/21
In laboratory experiments aggregates (1-2 mm) of a loamy colluvial soil and a silty luvisol soil were treated with the herbicides Gramoxone and Goltix WG, the active agent of Goltix WG Metamitron, luc...
Firmness and stability of plantain fruits under ambient
fruit firmness fruit water content plantain pulp/peel ratio storability
2008/11/21
Plantain (Musa spp) fruit physical properties of finger diameter, pulp/peel ratio, fruit water content and firmness were measured using standard procedures. Fruits with high firmness had low water co...
Effect of soil acidification on the formation of Fe-, Al-, and Mn-oxides and the stability of soil aggregates
soil acidification soil aggregate stability oxides
2008/11/20
The effect of intensive soil acidification on the genesis of Fe-, Al- and Mn-oxides and their relation to the soil aggregate stability were investigated in the Vienna Woods. Analyses were carried out...
Influence of long-term liming on aggregate stability of a loess-derived soil
liming aggregate stability settlement loessial soil surface sealing
2008/11/18
Results of a long-term field trial on a silt loam soil near Freising (Upper Bavaria) show that evaluating the meliorative effect of liming on soil structural properties depends on the initial homogene...
Influence of the microbiological activity on the soil aggregate stability
microbiological activity soil aggregate stability
2008/11/18
The influence of the microbiological activity on the soil aggregate stability of a silty Chernozem was investigated by promoting the microbial activity through D-glucose solution. After 2 weeks of inc...