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- Faster Processing for Inverting GPS Occultation Data
- NASA's Jet Propulsion Laboratory, Pasadena, CaliforniaA document outlines a computational method that can be incorporated into two prior methods used to invert Global Positioning System GPS occultation data [signal data acquired by a low-Earth-orbiting satellite as either this or the GPS satellite rises above or falls below the horizon] to...
- Research articles 2004-08-01
- Rejoinder.
- We are honored to have our work read and discussed at such a thorough level by several experts. Words of appreciation and encouragement are gratefully received, and the many supplementary comments, thoughtful reminders, new perspectives, and additional themes raised are warmly welcomed and deeply appreciated. Our...
- Research articles 2003-12-01
- Assessing variability due to race bridging: application to census counts and vital rates for the year 2000.
- In 1997, the Office of Management and Budget revised the standards for classification of Federal data on race and ethnicity. A key provision of the revised standards is that each respondent in a Federal data collection is now allowed to select more than one race to describe the person in...
- Research articles 2003-12-01
- Inferring infection transmission parameters that influence water treatment decisions.
- 1. Introduction Risk assessments can quantify the effect of water treatment interventions that improve human health by removing waterborne microbes. Secondary transmission of infection may strongly influence risk exposure and the public health benefit of water treatment, but secondary transmission dynamics are not always fully modeled, and the...
- Research articles 2003-07-01
- Inference With Imputed Conditional Means.(Statistical Data Included)
- In this article we present analytic techniques for inference from a dataset in which missing values have, been replaced by predictive means derived from an imputation model. The derivations are based on asymptotic expansions of point estimators and their associated variance estimators, and the resulting formulas...
- Research articles 2000-03-01
- Modeling of heterojunction HgCdTe photodiodes using approximate k (dot) p approach
- In this paper, we describe a new approach to simulation of HgCdTe devices based on an approximation for the k p model. We use an approximate expression for the carrier density which includes effects of carrier degeneracy and conduction band nonparabolicity. These effects are essential for accurate modeling of HgCdTe...
- Research articles 1997-06-01
- Bandwidth selection for indirect density estimation based on corrupted histogram data.
- A modified version of the method of unbiased risk estimation is proposed. The statistical methodology is based on formulas that use adjustments for correction factor variability applied to the generation of reconstruction histograms. It can accommodate extra-Poisson variation and reduces naturally to a new cross-validation type. Computational experiment show the...
- Research articles 1996-06-01
- Detection of covert message transmissions.
- Detection of Covert Message Transmissions (*1) Introduction In this paper we describe and compare methods of detecting short, randomly occurring messages. The emphasis is on spread-spectrum transmissions, but the energy detection results also apply to simple burst...
- Research articles 1989-09-01
- 14-bit SAR ADC: Analog Devices Wilmington, MA www.analog.com.(successive approximation register)(Brief Article)
- The AD7484 is the fastest 14-bit SAR successive approximation register ADC available, and offers a parallel interface with throughput rates up to 3 MSPS. A 12-bit version -- the AD7482 -- is also available. Interfacing is via standard control lines The AD7484 is the fastest 14-bit...
- Research articles 2001-10-01
- Quick EFC Approximation Chart (Not EFC)
- This tool generates a simplified chart showing approximations of the Expected Family Contribution EFC. The results are only an approximation of the Federal EFC figure that is calculated when you file the FAFSA form. This chart is likely to be within $500 of the correct results for typical students. The...
- Tools & templates 2009-01-01
- Quick EFC Approximation Calculator (Not EFC)
- This tool is used to prepare an approximation of the Expected Family Contribution EFC. The results are only an approximation of the Federal EFC figure that is calculated when you file the FAFSA form. This tool omits those input variables that have a relatively minimal impact on the EFC results,...
- Tools & templates 2008-01-01
- Optimal Investment Problems and Volatility Homogenization Approximations
- This paper describes some stochastic control problems in financial engineering arising from the need to find investment strategies to optimize some goal. Typically, these problems are characterized by nonlinear Hamilton-Jacobi-Bellman partial differential equations, and often they can be reduced to linear PDEs with the Legendre transform of convex duality. This...
- White papers 2001-12-17
- On the Methodological Unification in Electroencephalography
- This paper presents results of a pursuit of a repeatable and objective methodology of analysis of the electroencephalographic EEG time series. Adaptive time-frequency approximations of EEG are discussed in the light of the available experimental and theoretical evidence, and applicability in various experimental and clinical setups. Four lemmas and three...
- White papers 2005-03-04
- Sparse Gaussian Process Classification With Multiple Classes
- Sparse approximations to Bayesian inference for nonparametric Gaussian Process models scale linearly in the number of training points, allowing for the application of these powerful kernel-based models to large datasets. We show how to generalize the binary classification informative vector machine IVM to multiple classes. In contrast to earlier efficient...
- White papers 2004-04-27
- Analytical Performance Analysis of Kanban Systems Using a New Approximation for Fork/Join Stations
- In this paper, one proposes a new approximate approach for analyzing queuing models of single stage kanban systems. The approach is based on parametric decomposition technique and two moment approximations. The main building block of approach is a new two-moment approximation characterizing the performance of fork/join stations fed by general...
- White papers 2003-01-01
- A Better Approximate Formula for Pricing American Options
- This paper presents a simple and precise analytical approximation method for pricing American options under Merton's assumptions. It is a generalization of the approximations of the Partial Differential Equation PDE developed by McMillan, and Barone-Adesi and Whaley. The proposed solution is compared to other approximations, including the Cox, Ross and...
- White papers 2000-12-01
- Bounds And Approximations For The Transportation LP
- Bounds and approximate formulas are developed for the average optimum distance of the transportation linear programming problem TLP with homogeneously but randomly distributed points and demands in a region of arbitrary shape. The paper discusses how its results were used to estimate costs under uncertainty for a vehicle-repositioning problem. This...
- White papers 2002-10-30
Additional Resources
- A first approximation of the historical and extant vascular flora of New York City: Implications for native plant species conservation1
- DcCANDIDO, R. (Department of Biology, The City College of the City University of New York, New York, NY 10031), A. A. MUIR (Graduate Group in Ecology, 2148 Wickson Hall, University of California, Davis, CA 95616), and M. B. GARGIULLO (City of New York Department of Parks and Recreation, Natural Resources...
- Research articles 2004-07-01
- Analysis meets real world: CAE vendors aim for "true" simulation.(SIMULATION)(Computer Aided Engineering)
- Analysis in the engineering world has always been an approximation of reality. In fact, some engineers says it's an approximation of an approximation. But CAE vendors are striving to change that. Among the most recent moves: ABAQUS, known for its finite element analysis capabilities, has joined...
- Research articles 2005-04-18
- Insurance and Asset Pricing in Incomplete Markets With Heavy Tailed Risks
- A model for pricing risks in incomplete markets using prices for traded assets and allowing for heavy tailed risks is developed. The approach used is based on an approximation that collapses to the CAPM for multi normal portfolios. The pricing result is derived as an approximation using elliptical distributions and...
- White papers 2004-05-18
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