نتایج جستجو برای: stepwise regression coefficient and fisher

تعداد نتایج: 16860982  

2010
Jonathan M. O’Brien Walter K. Dodds

We conducted a series of stepwise NO3 2 additions to investigate the response of NO3 2 uptake to short-term (acute) changes in N concentration in 3 prairie streams. Observed NO3 2 uptake rates increased with short-term elevations in NO3 2 concentration and were consistent with linear and Michaelis–Menten kinetics models. We compiled these data with uptake rates from additional published studies...

2005
Mariano Cingolani

This paper concerns a method for estimating the age of children based on their teeth. The sample consisted of 455 Italian white children (213 boys, 242 girls) aged between 5 and 15 years. The purpose of the present investigation was to present a method for assessing chronological age based on the relationship between age and measurement of the open apices in teeth. Pearson’s correlation coeffic...

2007
Juliette Gutierrez Gondy Leroy

Crime reports are used by law enforcement to find criminals, prevent further violations, identify problems causing crimes and allocate government resources. Unfortunately, many crimes go unreported. This may lead to an incorrect crime picture and suboptimal responses to the existing situation. Our goal is to use a data mining approach to increase understanding of when crime is reported or not. ...

2003
Roberto Cameriere M. D. Luigi Ferrante Mariano Cingolani

This paper details a method for age determination of adults from single rooted teeth. The sample consisted of 100 Italian white Caucasian patients (46 men, 54 women) aged between 18 and 72 years. The single rooted maxillary right canine was utilized in this preliminary study. Pulp/root ration, tooth length, pulp/tooth length ratio, pulp/tooth area and pulp/root width ratios at three different l...

1992
Manfred Broy Max Fuchs Frank Dederichs Thomas F Gritzner Claus Dendorfer Rainer Weber

Focus is a framework for the systematic formal speci cation and development of distributed interactive systems and their components Focus provides models formalisms and veri cation calculi for the stepwise speci cation and development transformation and veri cation of such systems Focus aims at the modular de velopment and implementation of distributed interactive systems through several abstra...

Journal: :European Journal of Operational Research 2010
Peter M. Kort Pauli Murto Grzegorz Pawlina

We analyze the optimal investment strategy of a firm that can complete a project either in one stage at a single freely chosen time point or in incremental steps at distinct time points. The presence of economies of scale gives rise to the following trade-off: lumpy investment has a lower total cost, but stepwise investment gives more flexibility by letting the firm choose the timing individual...

2016
Nitendra K. Sahu

The emergence and rapid spread of chloroquine resistant strains of Plasmodium falciparum has dramatically reduced the chemotherapeutic options. Towards this goal, the quantitative structure-activity relationship analysis of some synthesized 7-substituted 4aminoquinolines were performed for their antiplasmodial activity against chloroquine-resistant parasites to find out the structural features ...

2014
Lin Cao Nicholas C. Coops John Innes Jinsong Dai Guanghui She

In order to better assess the spatial variability in subtropical forest biomass, the goal of our study was to use small-footprint, discrete-return Light Detection and Ranging (LiDAR) data to accurately estimate and map aboveand below-ground biomass components of subtropical forests. Foliage, branch, trunk, root, above-ground and total biomass of 53 plots (30 × 30 m) were modeled using a range o...

Greenhouse experiments in a completely randomized design were carried out to investigate the effects of nitroxin fertilizer (0, 1 and 2 li/ha) on morphological and physiological traits of Amaranthus retroflexus in 2013. The traits in the study included plant height, fresh and dry weight of shoots, roots, stem and leaf, Chlorophyll a, chlorophyll b, total chlorophyll, carotenoids, anthocyanin, a...

2016
Zahra Hajimahdi Fatemeh Safizadeh Afshin Zarghi

Caspase-3 inhibitory activities of some 1, 2-benzisothiazol-3-one derivatives were modeled by quantitative structure-activity relationship (QSAR) using stepwise-multiple linear regression (SW-MLR) method. The built model was robust and predictive with correlation coefficient (R(2)) of 0.91 and 0.59 for training and test groups, respectively. The quality of the model was evaluated by leave-one o...

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