Готові списки джерел за темами / COEFFICIENT ESTIMATES

Зміст

  1. Статті в журналах
  2. Дисертації
  3. Книги
  4. Частини книг
  5. Тези доповідей конференцій
  6. Звіти організацій

Добірка наукової літератури з теми "COEFFICIENT ESTIMATES"

Автор: Grafiati
Опубліковано: 11 вересня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "COEFFICIENT ESTIMATES".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "COEFFICIENT ESTIMATES"

1

Lentz, S. J., K. A. Davis, J. H. Churchill, and T. M. DeCarlo. "Coral Reef Drag Coefficients – Water Depth Dependence." Journal of Physical Oceanography 47, no. 5 (May 2017): 1061–75. http://dx.doi.org/10.1175/jpo-d-16-0248.1.

Повний текст джерела
Анотація:
AbstractA major challenge in modeling the circulation over coral reefs is uncertainty in the drag coefficient because existing estimates span two orders of magnitude. Current and pressure measurements from five coral reefs are used to estimate drag coefficients based on depth-average flow, assuming a balance between the cross-reef pressure gradient and the bottom stress. At two sites wind stress is a significant term in the cross-reef momentum balance and is included in estimating the drag coefficient. For the five coral reef sites and a previous laboratory study, estimated drag coefficients increase as the water depth decreases consistent with open channel flow theory. For example, for a typical coral reef hydrodynamic roughness of 5 cm, observational estimates, and the theory indicate that the drag coefficient decreases from 0.4 in 20 cm of water to 0.005 in 10 m of water. Synthesis of results from the new field observations with estimates from previous field and laboratory studies indicate that coral reef drag coefficients range from 0.2 to 0.005 and hydrodynamic roughnesses generally range from 2 to 8 cm. While coral reef drag coefficients depend on factors such as physical roughness and surface waves, a substantial fraction of the scatter in estimates of coral reef drag coefficients is due to variations in water depth.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Zaprawa, Paweł, and Katarzyna Tra̧bka-Wiȩcław. "Estimates of Coefficient Functionals for Functions Convex in the Imaginary-Axis Direction." Symmetry 12, no. 10 (October 20, 2020): 1736. http://dx.doi.org/10.3390/sym12101736.

Повний текст джерела
Анотація:
Let C0(h) be a subclass of analytic and close-to-convex functions defined in the open unit disk by the formula Re{(1−z2)f′(z)}>0. In this paper, some coefficient problems for C0(h) are considered. Some properties and bounds of several coefficient functionals for functions belonging to this class are provided. The main aim of this paper is to find estimates of the difference and of sum of successive coefficients, bounds of the sum of the first n coefficients and bounds of the n-th coefficient. The obtained results are used to determine coefficient estimates for both functions convex in the imaginary-axis direction with real coefficients and typically real functions. Moreover, the sum of the first initial coefficients for functions with a positive real part and with a fixed second coefficient is estimated.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Darus, Maslina, and Ajab Akbarally. "Coefficient estimates for Ruscheweyh derivatives." International Journal of Mathematics and Mathematical Sciences 2004, no. 36 (2004): 1937–42. http://dx.doi.org/10.1155/s0161171204309051.

Повний текст джерела
Анотація:
We consider functionsf, analytic in the unit disc and of the normalized formf(z)=z+∑n=2∞anzn. For functionsf∈R¯δ(β), the class of functions involving the Ruscheweyh derivatives operator, we give sharp upper bounds for the Fekete-Szegö functional|a3−μa22|.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Idrisa, Hamimu, S. A. Kadam, and S. D. Gorantiwar. "Estimation of Crop Coefficients Based on Normalize Difference Vegetation Index." Journal of Agriculture Research and Technology 47, no. 03 (2022): 381–88. http://dx.doi.org/10.56228/jart.2022.47320.

Повний текст джерела
Анотація:
Crop coefficient is one of the most important parameters used for the estimation of crop evapotranspiration (ETc). Crop coefficient (Kc)-based estimation of crop evapotranspiration is most commonly used methods for irrigation water management. However, crop coefficient approach used for estimation ETc using the generalized crop coefficients mentioned in Irrigation and Drainage Paper No. 56 of the Food and Agricultural Organization of the United Nations can contribute to crop evapotranspiration estimates that are substantially different from actual crop evapotranspiration. The colinear relationship between the crop coefficient curve and a satellitederived Normalized Difference Vegetation Index (NDVI) showed potential for modeling a crop coefficient as a function of the NDVI, which is also one among the methods used for estimation of ETc in irrigation water management. The present study was conducted with objectives to present the techniques and procedures to develop and estimates Kc based on vegetation index (NDVI) extracted from satellite data. The relationships between and NDVI and crop coefficients (Kc) of wheat and chickpea for corresponding months were developed. The regression models developed are: (Kc) NDVI = 6.3268*NDVI-1.4207 for wheat and (Kc) NDVI = 5.7866 * NDVI-1.6699 for chickpea. The models showed strong relationships with R2= 0.86 and R2=0.84 for wheat and chickpea, respectively. The model and techniques to develop and estimate crop coefficients can be used in other regions in the global, and hence estimate crop evapotranspiration. The crop coefficients (Kc) estimated based on NDVI are useful for irrigation scheduling, evaluating irrigation performance, irrigation water management, and estimation of water use efficiency.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Zaprawa, Paweł, Anna Futa, and Magdalena Jastrzębska. "On Coefficient Functionals for Functions with Coefficients Bounded by 1." Mathematics 8, no. 4 (April 1, 2020): 491. http://dx.doi.org/10.3390/math8040491.

Повний текст джерела
Анотація:
In this paper, we discuss two well-known coefficient functionals a 2 a 4 - a 3 2 and a 4 - a 2 a 3 . The first one is called the Hankel determinant of order 2. The second one is a special case of Zalcman functional. We consider them for functions in the class Q R ( 1 2 ) of analytic functions with real coefficients which satisfy the condition ( ) f ( z ) z > 1 2 for z in the unit disk Δ . It is known that all coefficients of f ∈ Q R ( 1 2 ) are bounded by 1. We find the upper bound of a 2 a 4 - a 3 2 and the bound of | a 4 - a 2 a 3 | . We also consider a few subclasses of Q R ( 1 2 ) and we estimate the above mentioned functionals. In our research two different methods are applied. The first method connects the coefficients of a function in a given class with coefficients of a corresponding Schwarz function or a function with positive real part. The second method is based on the theorem of formulated by Szapiel. According to this theorem, we can point out the extremal functions in this problem, that is, functions for which equalities in the estimates hold. The obtained estimates significantly extend the results previously established for the discussed classes. They allow to compare the behavior of the coefficient functionals considered in the case of real coefficients and arbitrary coefficients.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Raghunathan, Trivellore E., Paula K. Diehr, and Allen D. Cheadle. "Combining Aggregate and Individual Level Data to Estimate an Individual Level Correlation Coefficient." Journal of Educational and Behavioral Statistics 28, no. 1 (March 2003): 1–19. http://dx.doi.org/10.3102/10769986028001001.

Повний текст джерела
Анотація:
Methods are developed that use aggregate data, possibly based on a large number of individuals, and individual level data, from a small fraction of individuals from the same or similar population, to eliminate ecological bias inherent in the analysis of aggregate data. The primary focus is on estimating the individual level correlation coefficient but the proposed methodology can be extended to estimate regression coefficients. Two approaches, the method of moments and the maximum likelihood, are developed for a bivariate distribution, but can be extended to a multivariate distribution. The method of moments develops a corrected estimate of the within-group covariance matrix, which is then used to estimate the individual level correlation and regression coefficients. The second method assumes bivariate normality and maximizes the combined likelihood function based on the two data sets. The maximum likelihood estimates are obtained using the EM-algorithm. A simulation study investigates the repeated sampling properties of these procedures in terms of bias and the mean square error of the point estimates and the actual coverage of the confidence intervals. The maximum likelihood estimates are almost unbiased and the confidence intervals are well calibrated for simulation conditions considered. The method of moments estimates have the same desirable properties for some simulation conditions. Under all conditions, the correlation coefficient between aggregate variables is severely biased as an estimate of the individual level correlation coefficient.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Orhan, Halit, Nihat Yagmur, and Murat Caglar. "Coefficient estimates for Sakaguchi type functions." SARAJEVO JOURNAL OF MATHEMATICS 8, no. 2 (November 2012): 235–44. http://dx.doi.org/10.5644/sjm.08.2.05.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

SAKAR, F. Müge, and H. Özlem GÜNEY. "Coefficient estimates for bi-concave functions." Communications Faculty Of Science University of Ankara Series A1Mathematics and Statistics 68, no. 1 (April 11, 2018): 53–60. http://dx.doi.org/10.31801/cfsuasmas.443600.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Ozawa, Mitsuru. "Coefficient estimates for the class $\Sigma$." Kodai Mathematical Journal 9, no. 1 (1986): 123–33. http://dx.doi.org/10.2996/kmj/1138037155.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Totik, Vilmos. "Coefficient estimates on general compact sets." Publicationes Mathematicae Debrecen 96, no. 1-2 (January 1, 2020): 131–39. http://dx.doi.org/10.5486/pmd.2020.8631.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Дисертації з теми "COEFFICIENT ESTIMATES"

1

Galstian, Anahit. "Lp - Lq decay estimates for the equation with exponentially growing coefficient." Universität Potsdam, 2001. http://opus.kobv.de/ubp/volltexte/2008/2607/.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Wilson, Celia M. "Attenuation of the Squared Canonical Correlation Coefficient Under Varying Estimates of Score Reliability." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc30528/.

Повний текст джерела
Анотація:
Research pertaining to the distortion of the squared canonical correlation coefficient has traditionally been limited to the effects of sampling error and associated correction formulas. The purpose of this study was to compare the degree of attenuation of the squared canonical correlation coefficient under varying conditions of score reliability. Monte Carlo simulation methodology was used to fulfill the purpose of this study. Initially, data populations with various manipulated conditions were generated (N = 100,000). Subsequently, 500 random samples were drawn with replacement from each population, and data was subjected to canonical correlation analyses. The canonical correlation results were then analyzed using descriptive statistics and an ANOVA design to determine under which condition(s) the squared canonical correlation coefficient was most attenuated when compared to population Rc2 values. This information was analyzed and used to determine what effect, if any, the different conditions considered in this study had on Rc2. The results from this Monte Carlo investigation clearly illustrated the importance of score reliability when interpreting study results. As evidenced by the outcomes presented, the more measurement error (lower reliability) present in the variables included in an analysis, the more attenuation experienced by the effect size(s) produced in the analysis, in this case Rc2. These results also demonstrated the role between and within set correlation, variable set size, and sample size played in the attenuation levels of the squared canonical correlation coefficient.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Patterson, Mason Foushee. "Standardization of Street Sampling Units to Improve Street Tree Population Estimates Derived by I-Tree Streets Inventory Software." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/42687.

Повний текст джерела
Анотація:
Street trees are a subpopulation of the urban forest resource and exist in the rights-of-way adjacent to public roads in a municipality. Benefit-cost analyses have shown that the annual benefits provided by the average street tree far outweigh the costs of planting and maintenance. City and municipal foresters spend a majority of their time and resources managing street tree populations. Sample street tree inventories are a common method of estimating municipal street tree populations for the purposes of making urban forest policy, planning, and management decisions. i-Tree Streets is a suite of software tools capable of producing estimates of street tree abundance and value from a sample of street trees taken along randomly selected sections (segments) of public streets. During sample street tree inventories conducted by Virginia Tech Urban Forestry, it was observed that the lengths of the sample streets recommended by i-Tree varied greatly within most municipalities leading to concern about the impact of street length variation on sampling precision. This project was conducted to improve i-Tree Streets by changing the recommended sampling protocol without altering the software. Complete street tree censuses were obtained from 7 localities and standardized using GIS. The effects of standardizing street segments to 3 different lengths prior to sampling on the accuracy and precision of i-Tree Streets estimates were investigated though computer simulations and analysis of changes in variation in number of trees per street segment as a basis for recommending procedural changes. It was found that standardizing street segments significantly improved the precision of i-Tree Streets estimates. Based on the results of this investigation, it is generally recommended that street segments be standardized to 91m (300 ft) prior to conducting a sample inventory. Standardizing to 91m will significantly reduce the number of trees, the number of street segments, and the percentage of total street segments that must be sampled to achieve an estimate with a 10% relative standard error. The effectiveness of standardization and the associated processing time can be computed from municipal attributes before standardization so practitioners can gauge the marginal gains in field time versus costs in processing time. Automating standardization procedures or conducting an optimization study of segment length would continue to increase the efficiency and marginal gains associated with street segment standardization.
Master of Science
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Semaško, Ala. "Baigtinės populiacijos koreliacijos koeficiento vertinimas, naudojant papildomus kintamuosius." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110711_110917-80836.

Повний текст джерела
Анотація:
Šiame magistro darbe nagrinėjamos papildomos informacijos panaudojimo galimybės konstruojant baigtinės populiacijos koreliacijos koeficiento įvertinius. Taikant imties plano svorių kalibravimo metodus sukonstruojami aštuoni nauji koreliacijos koeficiento įvertiniai. Įvertiniams konstruoti panaudotos kelios kalibravimo lygčių ir atstumo funkcijų kombinacijos. Kalibruotieji svoriai išvesti pasitelkiant Lagranžo neapibrėžtųjų daugiklių metodą. Naudojant Teiloro ištiesinimo ir visrakčio metodus sukonstruojami koreliacijos koeficiento įvertinių dispersijos įvertiniai. Darbe taip pat atliekamas matematinis modeliavimas, kuriuo siekiama palyginti naujai sukonstruotus įvertinius tarpusavyje ir su standartiniu įvertiniu. Įvertinių tikslumą lemia pakankamai didelė koreliacija tarp tyrimo kintamųjų ir jų papildomų kintamųjų, o du įvertiniai yra tikslūs ir esant mažai koreliacijai. Tiriama, kaip įvertinių tikslumą įtakoja imties dydis bei koreliacija tarp tyrimo ir papildomų kintamųjų. Matematinio modeliavimo eksperimentai atlikti, naudojant darbo autorės sukurtas MATLAB programas.
This master’s thesis analyzes the opportunities of auxiliary information usage while constructing the correlation coefficient estimators of the finite population. By applying the methods of weight calibration of sample design the new eight correlation coefficient estimators are derived. Several combinations of calibration equations and distance measures are used to construct estimators. Calibration weights were derived through Lagrange multiplier method. Using Taylor linearization and jackknife methods variance estimators of the correlation coefficient estimators were constructed. The paper also contains a mathematical simulation aimed at comparing the new derived estimators in between and with a standard estimator. The accuracy of estimators is determined by rather substantial correlation between study and auxiliary variables, whereas two of the estimators are accurate even in the presence of bad correlation. It is tested how sample size and correlation between study and auxiliary variables influences the accuracy of estimators. All the mathemathical simulation tests were performed employing MATLAB programs that have been created by the author of this work.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Blair, Matthew D. "Strichartz estimates for wave equations with coefficients of Sobolev regularity /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/5745.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

CAFFERATA, Mattia. "Estimates for a family of exponential sums with modular coefficients." Doctoral thesis, Università degli studi di Ferrara, 2019. http://hdl.handle.net/11392/2488054.

Повний текст джерела
Анотація:
In this work we establish non-trivial estimates for a family of exponential sums weighted with modular coefficients. Two sequences of weights are considered: the sequence {a_f(n)} of the normalized Fourier coefficients of a cuspidal eigenform f and the sequence {\mu_f(n)} obtained as the inverse of {a_f(n)} with respect to the Dirichlet convolution. The main tool developed for our proof is a generalisation of a result due to Bourgain, Sarnak and Ziegler which is widely used to study the orthogonality properties of the Moebius function \mu(n). We remark that the function \mu_f(n) is strictly related to \mu(n); we can summarise saying that \mu_f(n) plays for the L-function associated to f the same role that \mu(n) plays for the Riemann zeta-function. In the first chapter we recall some basic properties of the Moebius function focusing on some aspects related to the Moebius Randomness Law and to the Sarnak conjecture. In the second chapter we recall some interesting properties about modular forms, we prove the generalisation of the result of Burgain, Sarnak and Ziegler and that it can be applied while working with the sequences {a_f(n)} and {\mu_f(n)}. In the third chapter we prove the estimates for the exponential sums.
In questo lavoro otteniamo stime non banali per una famiglia di somme esponenziali pesate con coefficienti di natura modulare. Due successioni di pesi sono considerate: la successione {a_f(n)} dei coefficienti di Fourier normalizzati di un’autofunzione cuspidale f del gruppo modulare e {\mu_f(n)} la successione inversa di {a_f(n)} rispetto alla convoluzione di Dirichlet. Lo strumento principale sviluppato per la nostra dimostrazione è una generalizzazione di un risultato di Bourgain, Sarnak e Ziegler; nella versione originale, il risultato ha numerose applicazioni nello studio delle proprietà di cancellazione legate alla funzione di Moebius \mu(n), a cui solitamente ci si riferisce con Moebius Randomness Law. Osserviamo che la funzione \mu_f(n) è strettamente legata a \mu(n); possiamo sintetizzare dicendo che \mu_f(n) gioca per la L-funzione associata ad f il ruolo che \mu(n) gioca per la funzione zeta di Riemann. Nel primo capitolo si richiamano alcune proprietà generali della funzione di Moebius con particolare enfasi su questioni inerenti alla Moebius Randomness Law e alla congettura di Sarnak. Nel secondo capitolo si richiamano alcuni aspetti interessanti delle forme modulari, si dimostra la generalizzazione del risultato di Bourgain, Sarnak e Ziegler e la sua applicabilità alle due successioni {a_f(n)} and {\mu_f(n)}. Nel terzo capitolo si dimostrano le stime per le somme esponenziali.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

SHANG, FENG. "PATH-DEPENDENT APPROACH TO ESTIMATE CHLORINE WALL DEMAND COEFFICIENT IN WATER DISTRIBUTION SYSTEM." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1109274766.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Petzoldt, Martin. "Regularity and error estimators for elliptic problems with discontinuous coefficients." [S.l.] : [s.n.], 2001. http://www.diss.fu-berlin.de/2001/111/index.html.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Glenn, L. Lee, and Jeff R. Knisley. "Use of Eigenslope to Estimate Fourier Coefficients for Passive Cable Models of the Neuron." Digital Commons @ East Tennessee State University, 1997. https://dc.etsu.edu/etsu-works/7540.

Повний текст джерела
Анотація:
Boundary conditions for the cable equation - such as voltage-clamped or sealed cable ends, branchpoints, somatic shunts, and current clamps - result in multi-exponential series representations of the voltage or current. Each term in the series expansion is characterized by a decay rate (eigenvalue) and an initial amplitude (Fourier coefficient). The eigenvalues are determined numerically and the Fourier coefficients are subsequently given by the residues at the eigenvalues of the Laplace transform of the solution. In this paper, we introduce an alternative method for estimating the Fourier coefficients which works for all types of boundary conditions and is practical even when analytic expressions for the Fourier coefficients become intractable. It is shown that terms in the analytic expressions for the Fourier coefficients result from derivatives of the equation for the eigenvalues, and that simple numerical estimates for the amplitude coefficients are easily derived by replacing analytical derivatives by numerical eigenslope. The physical quantity represented by the slope is identified as effective neuron capacitance.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Benhmida, Saïd. "Robustesse et comportement asymptotique d'un TRA-estimateur des coefficients d'un processus ARMA (p,q)." Nancy 1, 1995. http://www.theses.fr/1995NAN10035.

Повний текст джерела
Анотація:
Le but essentiel de ce travail est de définir et étudier un estimateur robuste des coefficients d'un modèle moyenne mobile, d'ordre q entier supérieur ou égal a un. Nous commençons par établir la définition d'un estimateur (basé sur les autocovariances des résidus tronqué) pour les coefficients d'un modèle moyenne mobile d'ordre q et ses liens avec d'autres estimateurs. Après avoir introduit la notion de robustesse dans le cadre des séries chronologiques, nous étudions la robustesse de cet estimateur, ou nous montrons que sa fonction d'influence est bornée. Nous nous intéressons aussi au comportement asymptotique de cet estimateur, ou nous montrons sa convergence presque sure et sa normalité asymptotique. Puis nous montrons que les résultats obtenus pour un modèle moyenne mobile se généralisent à un modèle autorégressif moyenne mobile d'ordre p et q. à la fin nous nous donnons une application numérique, qui a pour but d'illustrer les résultats théoriques obtenus pour un modèle moyenne mobile d'ordre deux et de généraliser les algorithmes d'estimation à des modèles moyenne mobile d'ordre q supérieur ou égal à deux
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Книги з теми "COEFFICIENT ESTIMATES"

1

Carter, Thomas E. Coefficient-of-parentage and genetic-similarity estimates for 258 North American soybean cultivars released by public agencies during 1945-88. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Carter, Thomas E. Coefficient-of-parentage and genetic-similarity estimates for 258 North American soybean cultivars released by public agencies during 1945-88. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Carter, Thomas E. Coefficient-of-parentage and genetic-similarity estimates for 258 North American soybean cultivars released by public agencies during 1945-88. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Carter, Thomas E. Coefficient-of-parentage and genetic-similarity estimates for 258 North American soybean cultivars released by public agencies during 1945-88. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Carter, Thomas E. Coefficient-of-parentage and genetic-similarity estimates for 258 North American soybean cultivars released by public agencies during 1945-88. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Carter, Thomas E. Coefficient-of-parentage and genetic-similarity estimates for 258 North American soybean cultivars released by public agencies during 1945-88. [Washington, D.C.?]: U.S. Dept. of Agriculture, Agricultural Research Service, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Arulampalam, Wiji. A note on estimated coefficients in random effects probit models. Coventry: University of Warwick, Department of Economics, 1998.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Morelli, Eugene A. Determining the accuracy of aerodynamic model parameters estimated from flight test data. Washington, D.C: American Institute of Aeronautics and Astronautics, 1995.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Morelli, Eugene A. Determining the accuracy of aerodynamic model parameters estimated from flight test data. Washington, D.C: American Institute of Aeronautics and Astronautics, 1995.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Morelli, Eugene A. Determining the accuracy of aerodynamic model parameters estimated from flight test data. Washington, D.C: American Institute of Aeronautics and Astronautics, 1995.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Частини книг з теми "COEFFICIENT ESTIMATES"

1

I. Gurariy, Vladimir, and Wolfgang Lusky. "Coefficient Estimates and the Müntz Theorem." In Lecture Notes in Mathematics, 71–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11551621_6.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Metcalfe, Jason, and Daniel Tataru. "Decay Estimates for Variable Coefficient Wave Equations in Exterior Domains." In Advances in Phase Space Analysis of Partial Differential Equations, 201–16. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4861-9_12.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Hu, Gongzhu, Jinping Wang, and Wenying Feng. "Multivariate Regression Modeling for Home Value Estimates with Evaluation Using Maximum Information Coefficient." In Studies in Computational Intelligence, 69–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32172-6_6.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

von Weizsäcker, Carl Christian, and Hagen M. Krämer. "Real Capital." In Saving and Investment in the Twenty-First Century, 63–103. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75031-2_4.

Повний текст джерела
Анотація:
AbstractPreshaped by the influence of Marx, Böhm-Bawerk and modern neoclassical economics, the general opinion is that the marginal product of capital must always be positive. With the help of the “period of production” T, we define a coefficient of intertemporal substitutionψ that is always non-negative. It can also be used when the real interest rate is negative. With the help of the concept of the “waiting period” Z, we can also define an always non-negative coefficient of intertemporal substitutionγ for the household side. The “loss formula” for deviations of the rate of interest from the growth rate is one application of ψ and γ. Ω = (ψT2 + γZ2)(r − g)2/2 provides a good approximation of the relative loss Ω. Overcomplexity of the system of production leads to negative marginal returns on capital. It can be empirically presumed that the OECD plus China region is on the cusp of overcomplexity. The hypothetical natural rate of interest in the eurozone is well into the minuses. To determine the value of the real capital of the private sector in the OECD plus China region, we use a framework of data taken from the World Inequality Database (WID.world). We have supplemented the data available there with data from other sources and adapted it to our theoretical objectives. According to our estimates, private wealth in the form of real capital in the OECD plus China region comes to approximately four times total annual consumption.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Klainerman, Sergiu, and Francesco Nicolò. "Estimates for the Connection Coefficients." In The Evolution Problem in General Relativity, 115–202. Boston, MA: Birkhäuser Boston, 2003. http://dx.doi.org/10.1007/978-1-4612-2084-8_4.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Ni, Yongshen, and John Y. Cheung. "Correlation Coefficient Estimate for Fuzzy Data." In Intelligent Systems Design and Applications, 105–14. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-44999-7_11.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Duke, W., and H. Iwaniec. "Estimates for coefficients of L-functions. III." In Progress in Mathematics, 113–20. Boston, MA: Birkhäuser Boston, 1992. http://dx.doi.org/10.1007/978-1-4757-4269-5_9.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Dudek, Anna E., Harry Hurd, and Wioletta Wójtowicz. "Bootstrap for Maximum Likelihood Estimates of PARMA Coefficients." In Lecture Notes in Mechanical Engineering, 15–22. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04187-2_2.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Iwaniec, Henryk. "Estimates for the Fourier coefficients of Maass forms." In Spectral Methods of Automorphic Forms, 107–20. Providence, Rhode Island: American Mathematical Society, 2002. http://dx.doi.org/10.1090/gsm/053/10.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Kozlov, Vladimir, and Vladimir Maz’ya. "Two-Weight L2-Estimates for Equations with Variable Coefficients." In Springer Monographs in Mathematics, 133–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-11555-8_7.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "COEFFICIENT ESTIMATES"

1

Hern, Andy Liew Pik, and Aini Janteng. "Coefficient estimates for some subclasses of bi-univalent functions." In THE 4TH INTERNATIONAL CONFERENCE ON MATHEMATICAL SCIENCES: Mathematical Sciences: Championing the Way in a Problem Based and Data Driven Society. Author(s), 2017. http://dx.doi.org/10.1063/1.4980967.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Deniz, Erhan, Yekta Gülsün, and Nizami Mustafa. "Coefficient estimates for certain analytic functions satisfying subordinate condition." In II. INTERNATIONAL CONFERENCE ON ADVANCES IN NATURAL AND APPLIED SCIENCES: ICANAS 2017. Author(s), 2017. http://dx.doi.org/10.1063/1.4981651.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Omar, Rashidah, Suzeini Abdul Halim, and Aini Janteng. "Coefficient estimates for certain subclass of bi-univalent functions." In PROCEEDINGS OF THE 24TH NATIONAL SYMPOSIUM ON MATHEMATICAL SCIENCES: Mathematical Sciences Exploration for the Universal Preservation. Author(s), 2017. http://dx.doi.org/10.1063/1.4995829.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Bhat, Bethany. "Meta-Analytic Pooling of Intraclass Correlation Coefficient Estimates (Poster 19)." In AERA 2022. USA: AERA, 2022. http://dx.doi.org/10.3102/ip.22.1925622.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Anderson, Janelle J., William D. O'Brien, Timothy J. Hall, Maria-Teresa Herd, Michael R. King, Alexander Haak, Zachary T. Hafez, et al. "Interlaboratory comparison of backscatter coefficient estimates for tissue-mimicking phantoms." In 2009 IEEE International Ultrasonics Symposium. IEEE, 2009. http://dx.doi.org/10.1109/ultsym.2009.5441613.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

AlAmoush, Adnan G., and Maslina Darus. "On coefficient estimates for new generalized subclasses of bi-univalent functions." In THE 2014 UKM FST POSTGRADUATE COLLOQUIUM: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2014 Postgraduate Colloquium. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4895312.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Yong, Chow Li, Aini Janteng, and Suzeini Abd Halim. "Coefficient estimates for a subclass of bi-close-to-convex functions." In PROCEEDING OF THE 25TH NATIONAL SYMPOSIUM ON MATHEMATICAL SCIENCES (SKSM25): Mathematical Sciences as the Core of Intellectual Excellence. Author(s), 2018. http://dx.doi.org/10.1063/1.5041662.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Amourah, Ala A. "Faber polynomial coefficient estimates for a class of analytic bi-univalent functions." In SECOND INTERNATIONAL CONFERENCE OF MATHEMATICS (SICME2019). Author(s), 2019. http://dx.doi.org/10.1063/1.5097821.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Bayram, Hasan, and Sibel Yalçin. "Coefficient estimates for certain subclasses of analytic functions defined by new operator." In FOURTH INTERNATIONAL CONFERENCE OF MATHEMATICAL SCIENCES (ICMS 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0042208.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Prokhorov, Dmitri V. "Radii of neighborhoods for coefficient estimates of functions close to the identity." In Third CMFT Conference. WORLD SCIENTIFIC, 1999. http://dx.doi.org/10.1142/9789812833044_0035.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "COEFFICIENT ESTIMATES"

1

Bryant, Mary, Duncan Bryant, Leigh Provost, Nia Hurst, Maya McHugh, Anna Wargula, and Tori Tomiczek. Wave attenuation of coastal mangroves at a near-prototype scale. Engineer Research and Development Center (U.S.), September 2022. http://dx.doi.org/10.21079/11681/45565.

Повний текст джерела
Анотація:
A physical model study investigating the dissipation of wave energy by a 1:2.1 scale North American red mangrove forest was performed in a large-scale flume. The objectives were to measure the amount of wave attenuation afforded by mangroves, identify key hydrodynamic parameters influencing wave attenuation, and provide methodologies for application. Seventy-two hydrodynamic conditions, comprising irregular and regular waves, were tested. The analysis related the dissipation to three formulations that can provide estimates of wave attenuation for flood risk management projects considering mangroves: damping coefficient β, drag coefficient C𝐷, and Manning’s roughness coefficient 𝑛. The attenuation of the incident wave height through the 15.12 m long, 1:2.1 scale mangrove forest was exponential in form and varied from 13%–77%. Water depth and incident wave height strongly influenced the amount of wave attenuation. Accounting for differences in water depth using the sub-merged volume fraction resulted in a common fit of the damping coefficient as a function of relative wave height and wave steepness. The drag coefficient demonstrated a stronger relationship with the Keulegan–Carpenter number than the Reynolds number. The linear relationship between relative depth and Manning’s 𝑛 was stronger than that between Manning’s 𝑛 and either relative wave height or wave steepness.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Over, Thomas, Riki Saito, Andrea Veilleux, Padraic O’Shea, Jennifer Sharpe, David Soong, and Audrey Ishii. Estimation of Peak Discharge Quantiles for Selected Annual Exceedance Probabilities in Northeastern Illinois. Illinois Center for Transportation, June 2016. http://dx.doi.org/10.36501/0197-9191/16-014.

Повний текст джерела
Анотація:
This report provides two sets of equations for estimating peak discharge quantiles at annual exceedance probabilities (AEPs) of 0.50, 0.20, 0.10, 0.04, 0.02, 0.01, 0.005, and 0.002 (recurrence intervals of 2, 5, 10, 25, 50, 100, 200, and 500 years, respectively) for watersheds in Illinois based on annual maximum peak discharge data from 117 watersheds in and near northeastern Illinois. One set of equations was developed through a temporal analysis with a two-step least squares-quantile regression technique that measures the average effect of changes in the urbanization of the watersheds used in the study. The resulting equations can be used to adjust rural peak discharge quantiles for the effect of urbanization, and in this study the equations also were used to adjust the annual maximum peak discharges from the study watersheds to 2010 urbanization conditions. The other set of equations was developed by a spatial analysis. This analysis used generalized least-squares regression to fit the peak discharge quantiles computed from the urbanization-adjusted annual maximum peak discharges from the study watersheds to drainage-basin characteristics. The peak discharge quantiles were computed by using the Expected Moments Algorithm following the removal of potentially influential low floods defined by a multiple Grubbs-Beck test. To improve the quantile estimates, regional skew coefficients were obtained from a newly developed regional skew model in which the skew increases with the urbanized land use fraction. The skew coefficient values for each streamgage were then computed as the variance-weighted average of at-site and regional skew coefficients. The drainage-basin characteristics used as explanatory variables in the spatial analysis include drainage area, the fraction of developed land, the fraction of land with poorly drained soils or likely water, and the basin slope estimated as the ratio of the basin relief to basin perimeter. This report also provides: (1) examples to illustrate the use of the spatial and urbanization-adjustment equations for estimating peak discharge quantiles at ungaged sites and to improve flood-quantile estimates at and near a gaged site; (2) the urbanization-adjusted annual maximum peak discharges and peak discharge quantile estimates at streamgages from 181 watersheds including the 117 study watersheds and 64 additional watersheds in the study region that were originally considered for use in the study but later deemed to be redundant. The urbanization-adjustment equations, spatial regression equations, and peak discharge quantile estimates developed in this study will be made available in the web-based application StreamStats, which provides automated regression-equation solutions for user-selected stream locations. Figures and tables comparing the observed and urbanization-adjusted peak discharge records by streamgage are provided at http://dx.doi.org/10.3133/sir20165050 for download.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Kott, Phillip S. Better Coverage Intervals for Estimators from a Complex Sample Survey. RTI Press, February 2020. http://dx.doi.org/10.3768/rtipress.2020.mr.0041.2002.

Повний текст джерела
Анотація:
Coverage intervals for a parameter estimate computed using complex survey data are often constructed by assuming the parameter estimate has an asymptotically normal distribution and the measure of the estimator’s variance is roughly chi-squared. The size of the sample and the nature of the parameter being estimated render this conventional “Wald” methodology dubious in many applications. I developed a revised method of coverage-interval construction that “speeds up the asymptotics” by incorporating an estimated measure of skewness. I discuss how skewness-adjusted intervals can be computed for ratios, differences between domain means, and regression coefficients.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Menéses-González, María Fernanda, Angélica María Lizarazo-Cuéllar, Diego Cuesta-Mora, and Daniel Esteban Osorio-Ramírez. Financial Development and Monetary Policy Transmission. Banco de la República Colombia, November 2022. http://dx.doi.org/10.32468/be.1219.

Повний текст джерела
Анотація:
This paper estimates the effect of financial development on the transmission of monetary policy. To do so, the paper employs a panel data set containing financial development indicators, policy rates, lending rates, and deposit rates for 43 countries for the period 2000-2019 and applies the empirical strategy of Brandao Marques et al. (2020): firstly, monetary policy shocks are estimated using a Taylor-rule specification that relates changes in the policy rate to inflation, the output gap and other observables that are likely to influencemonetary policy decisions; secondly, the residuals of this estimation (policy shocks) are used in a specification that relates lending or deposit rates to, among others, policy shocks and the interaction between policy shocks and measures of financial development. The coefficient on this interaction term captures the effect of financial development on the relationship between policy shocks and lending or deposit rates. The main findings of the paper are twofold: on the one hand, financial development does strengthen the monetary policy transmission channel to deposit rates; that is, changes in the policy rate in economies with more financial development induce larger changes (in the same direction) in deposit rates than is the case in economies with less financial development. This result is particularly driven by the effect of the development of financial institutions on policy transmission – the effect of financial markets development turns out to be smaller in magnitude. On the other hand, financial development does not strengthen the transmission of monetary policy to lending rates. This is consistent with a credit channel which weakens in the face of financial development in a context where banks cannot easily substitute short-term funding sources. These results highlight the relevance of financial development for the functioning of monetary policy across countries, and possibly imply the necessity of a more active role of monetary authorities in fostering financial development.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Kurozumi, Takushi, Ryohei Oishi, and Willem Van Zandweghe. Sticky Information Versus Sticky Prices Revisited: A Bayesian VAR-GMM Approach. Federal Reserve Bank of Cleveland, November 2022. http://dx.doi.org/10.26509/frbc-wp-202234.

Повний текст джерела
Анотація:
Several Phillips curves based on sticky information and sticky prices are estimated and compared using Bayesian VAR-GMM. This method derives expectations in each Phillips curve from a VAR and estimates the Phillips curve parameters and the VAR coefficients simultaneously. Quasi-marginal likelihood-based model comparison selects a dual stickiness Phillips curve in which, each period, some prices remain unchanged, consistent with micro evidence. Moreover, sticky information is a more plausible source of inflation inertia in the Phillips curve than other sources proposed in previous studies. Sticky information, sticky prices, and unchanged prices in each period are all needed to better describe inflation dynamics.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Álvarez, Carola, Leonardo Corral, José Martínez, and César Montiel. Project Completion Report Analysis: Implications for the Portfolio. Inter-American Development Bank, March 2021. http://dx.doi.org/10.18235/0003145.

Повний текст джерела
Анотація:
This investigation builds on the Alvarez et al. (2021) Project Completion Report (PCR) analysis and its aim is to assess the implications of that study for the current portfolio of projects under execution at the Inter-American Development Bank (IDB). We use the sample of PCRs which reached operational closure (CO) in 2017 and 2018 to estimate the impact that design and execution performance characteristics of projects played in the likelihood of ending as successful and/or effective. Based on the estimated coefficients, we construct risk curves to isolate the effect specific characteristics have on the likelihood of a project being classified as unsuccessful/ineffective. We then use the estimated coefficients and, using the actual values for the current portfolio of projects in execution, identify the fraction of the portfolio that is at risk of ending as unsuccessful/ineffective projects. According to our analysis, of the 249 projects assessed, 39 have a 50% or less chance of being successful. Thirteen (13) projects have less than a 10% chance. For about 70% of the projects analyzed, given the characteristics they exhibit, the likelihood that they end up successful has already been curtailed. The type of analysis presented here can help IDB Management identify key performance indicators to keep track of during execution to periodically assess the level of risk it is willing to accept in terms of projects ending unsuccessful/ineffective as rated by the current PCR methodology.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Goldak, J. L51647 Welding on Fluid Filled and Pressurized Pipelines-Transient 3D Analysis. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), March 2000. http://dx.doi.org/10.55274/r0011356.

Повний текст джерела
Анотація:
The objective of this project was to determine if research in Computational Weld Mechanics had matured to the stage where it could simulate the process of welding on a pressurized pipeline and provide useful estimates of the risk of burn-through. To achieve that objective we have compared the results of our FEM analyzes of several welds with the experimental data reported in "http://www.prci.com/publications/L51763.htm" PR-185-9515, Repair of Pipelines by Direct Deposition of Weld Metal: Further Studies. The temperature and deformation predicted by our FEM analysis agrees quite well with the experimental data. The critical input data in addition to the internal pressure in the pipe, the geometry of the pipe, the size and shape of the weld pool including weld reinforcement, are the convection coefficient on the internal pipe surface and the temperature dependence of the viscosity of the pipe metal. Our FEM analysis shows that creep under the weld pool can thin the pipe wall and form a groove. In welds that show significant groove formation and thus high risk of burn through, this groove is significantly deeper than in welds that are at low risk of burn-through. When the pipe wall is thinned by the groove, the internal pipe wall temperature increases under the weld pool. Also the groove could reduce the convection on the internal pipe wall. This would further increase the temperature on the internal pipe wall under the weld pool and further accelerate actual burn-through. In our FEM analysis, we found no significant groove formation in those welds for which no significant groove formation was reported in the PR-185-9515 experiments. We found significant groove formation exactly in those welds that burned-through or were at high risk of burn-through. In those welds, the FEM analyses predicted a somewhat deeper groove than experiment. This suggests the FEM analyses erred on the safe side. In this sense, we conclude that we have succeeded in computing useful estimates of the risk of burn-through using Computational Weld Mechanics. It is notable that almost no use is made of adjustable or tuning parameters. To simulate the actual burn-through we conjecture that we would need to include inertial forces in the stress analysis.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Baral, Aniruddha, Jeffrey Roesler, M. Ley, Shinhyu Kang, Loren Emerson, Zane Lloyd, Braden Boyd, and Marllon Cook. High-volume Fly Ash Concrete for Pavements Findings: Volume 1. Illinois Center for Transportation, September 2021. http://dx.doi.org/10.36501/0197-9191/21-030.

Повний текст джерела
Анотація:
High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This research report helps with the implementation of HVFAC for pavement applications by providing guidelines for HVFAC mix design, testing protocols, and new tools for better quality control of HVFAC properties. Calorimeter tests were performed to evaluate the effects of fly ash sources, cement–fly ash interactions, chemical admixtures, and limestone replacement on the setting times and hydration reaction of HVFAC. To better target the initial air-entraining agent dosage for HVFAC, a calibration curve between air-entraining dosage for achieving 6% air content and fly ash foam index test has been developed. Further, a digital foam index test was developed to make this test more consistent across different labs and operators. For a more rapid prediction of hardened HVFAC properties, such as compressive strength, resistivity, and diffusion coefficient, an oxide-based particle model was developed. An HVFAC field test section was also constructed to demonstrate the implementation of a noncontact ultrasonic device for determining the final set time and ideal time to initiate saw cutting. Additionally, a maturity method was successfully implemented that estimates the in-place compressive strength of HVFAC through wireless thermal sensors. An HVFAC mix design procedure using the tools developed in this project such as the calorimeter test, foam index test, and particle-based model was proposed to assist engineers in implementing HVFAC pavements.
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Goetsch, Arthur L., Yoav Aharoni, Arieh Brosh, Ryszard (Richard) Puchala, Terry A. Gipson, Zalman Henkin, Eugene D. Ungar, and Amit Dolev. Energy Expenditure for Activity in Free Ranging Ruminants: A Nutritional Frontier. United States Department of Agriculture, June 2009. http://dx.doi.org/10.32747/2009.7696529.bard.

Повний текст джерела
Анотація:
Heat production (HP) or energy expenditure for activity (EEa) is of fundamental nutritional importance for livestock because it determines the proportion of ingested nutrients available for productive functions. Previous estimates of EEa are unreliable and vary widely with different indirect methodologies. This leads to erroneous nutritional strategies, especially when intake on pasture does not meet nutritional requirements and supplementation is necessary for acceptable production. Therefore, the objective of this project was to measure EEa in different classes of livestock (beef cattle and goats) over a wide range of ecological and management conditions to develop and evaluate simple means of prediction. In the first study in Israel, small frame (SF) and large frame (LF) cows (268 and 581 kg) were monitored during spring, summer, and autumn. Feed intake by SF cows per unit of metabolic weight was greater (P < 0.001) than that by LF cows in both spring and summer and their apparent selection of higher quality herbage in spring was greater (P < 0.10) than that of LF cows. SF cows grazed more hours per day and walked longer distances than the LF cows during all seasons. The coefficient of specific costs of activities (kJ•kg BW-0.75•d-1) and of locomotion (J•kg BW-0.75•m-1) were smaller for the SF cows. In the second study, cows were monitored in March, May, and September when they grazed relatively large plots, 135 and 78 ha. Energy cost coefficients of standing, grazing, and horizontal locomotion derived were similar to those of the previous study based on data from smaller plots. However, the energy costs of walking idle and of vertical locomotion were greater than those found by Brosh et al. (2006) but similar to those found by Aharoni et al. (2009). In the third study, cows were monitored in February and May in a 78-ha plot with an average slope of 15.5°, whereas average plot slopes of the former studies ranged between 4.3 and 6.9°. Energy cost coefficients of standing, grazing, and walking idle were greater than those calculated in the previous studies. However, the estimated energy costs of locomotion were lower in the steeper plot. A comparison on a similar HP basis, i.e., similar metabolizable energy (ME) intake, shows that the daily energy spent on activities in relation to daily HP increased by 27% as the average plot slope increased from 5.8 and 6.02 to 15.5°. In the fourth study, cows grazing in a woodland habitat were monitored as in previous studies in December, March, and July. Data analysis is in progress. In the first US experiment, Boer and Spanish does with two kids were used in an experiment beginning in late spring at an average of 24 days after kidding. Two does of each breed resided in eight 0.5-ha grass/forb pastures. Periods of 56, 60, 63, 64, and 73 days in length corresponded to mid-lactation, early post-weaning, the late dry period, early gestation, and mid-gestation. EEa expressed as a percentage of the ME requirement for maintenance plus activity in confinement (EEa%) was not influenced by stocking rate, breed, or period, averaging 49%. Behavioral activities (e.g., time spent grazing, walking, and idle, distance traveled) were not highly related to EEa%, although no-intercept regressions against time spent grazing/eating and grazing/eating plus walking indicated an increase in EEa% of 5.8 and 5.1%/h, respectively. In the second study, animal types were yearling Angora doeling goats, yearling Boer wether goats, yearling Spanish wether goats, and Rambouilletwether sheep slightly more than 2 yr of age. Two animals of each type were randomly allocated to one of four pastures 9.3, 12.3, 4.6, and 1.2 ha in area. The experiment was conducted in the summer with three periods, 30, 26, and 26 days in length. EEa% was affected by an interaction between animal type and period (Angora: 16, 17, and 15; Boer: 60, 67, and 34; Spanish: 46, 62, and 42; sheep: 22, 12, and 22% in periods 1, 2, and 3, respectively (SE = 6.1)). EEa% of goats was predicted with moderate accuracy (R2 = 0.40-0.41) and without bias from estimates of 5.8 and 5.1%/h spent grazing/eating and grazing/eating plus walking, respectively, determined in the first experiment; however, these methods were not suitable for sheep. These methods of prediction are simpler and more accurate than currently recommended for goats by the National Research Council.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Bajari, Patrick, Jeremy Fox, Kyoo il Kim, and Stephen Ryan. A Simple Nonparametric Estimator for the Distribution of Random Coefficients. Cambridge, MA: National Bureau of Economic Research, August 2009. http://dx.doi.org/10.3386/w15210.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Також вас можуть зацікавити розширені добірки на тему "COEFFICIENT ESTIMATES" для конкретних типів джерел:
Статті в журналах Дисертації Книги
Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

До бібліографії