Results 51 to 60 of about 279 (150)
A nonmonotone trust-region-approach with nonmonotone adaptive radius for solving nonlinear systems
Iranian Journal of Numerical Analysis and Optimization, 2016 This paper presents a trust-region procedure for solving systems of nonlinear equations. The proposed approach takes advantages of an effective adaptive trust-region radius and a nonmonotone strategy by combining both of them appropriately. It is believed that selecting an appropriate adaptive radius based on a suitable nonmonotone strategy can improve
Amini, Keyvan +2 more
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Gaussian Transforms Modeling and the Estimation of Distributional Regression Functions
Econometrica, Volume 93, Issue 5, Page 1885-1913, September 2025.We propose flexible Gaussian representations for conditional cumulative distribution functions and give a concave likelihood criterion for their estimation. Optimal representations satisfy the monotonicity property of conditional cumulative distribution functions, including in finite samples and under general misspecification.
Richard H. Spady, Sami Stouli
wiley +1 more source
Robust causal inference for point exposures with missing confounders
Canadian Journal of Statistics, Volume 53, Issue 2, June 2025.Abstract Large observational databases are often subject to missing data. As such, methods for causal inference must simultaneously handle confounding and missingness; surprisingly little work has been done at this intersection. Motivated by this, we propose an efficient and robust estimator of the causal average treatment effect from cohort studies ...
Alexander W. Levis +3 more
wiley +1 more source
Theory‐Driven IRT Modeling of Vocabulary Development: Matthew Effects and the Case for Unipolar IRT
Journal of Educational Measurement, Volume 62, Issue 2, Page 199-224, Summer 2025.Abstract Item response theory (IRT) encompasses a broader class of measurement models than is commonly appreciated by practitioners in educational measurement. For measures of vocabulary and its development, we show how psychological theory might in certain instances support unipolar IRT modeling as a superior alternative to the more traditional ...
Qi (Helen) Huang +2 more
wiley +1 more source
Mathematical Methods in the Applied Sciences, Volume 48, Issue 8, Page 9088-9097, 30 May 2025.ABSTRACT We suggest a modified version of the nonnegative matrix factorization problem, adding penalty terms to the model with the aim of taking control of the condition number of the decomposition elements. This measure is taken to reinforce computational stability in the solution path of the relevant optimization model.
Fatemeh Dargahi +3 more
wiley +1 more source
Statistics in Medicine, Volume 44, Issue 10-12, May 2025.ABSTRACT Detecting the efficacy signal and determining the optimal dose are critical steps to increase the probability of success and expedite the drug development in cancer treatment. After identifying a safe dose range through phase I studies, conducting a multidose randomized trial becomes an effective approach to achieve this objective.
Jingyi Zhang +7 more
wiley +1 more source
Nonmonotonic Rule Systems on Top of Ontology Layers [PDF]
, 2002 The development of the Semantic Web proceeds in layers. Currently the most advanced layer that has reached maturity is the ontology layer, in the from of the DAML+OIL language which corresponds to a rich description logic. The next step will be the the realization of logical rule systems on top of the ontology layer.Computationally simple nonmonotonic ...
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On fraud and certification of green production
Journal of Economics &Management Strategy, Volume 34, Issue 2, Page 501-524, Summer 2025.Abstract We present a novel model of fraud and certification in green production. We focus on settings where firms decide between a green or a standard version of a product together with an advertising strategy that can include fraud. In addition, green firms can choose to certify their production to guarantee the truthfulness of their claims.
Carmen Arguedas, Esther Blanco
wiley +1 more source
Centrifugation-Assisted Three-Dimensional Printing of Devices Embedded with Fully Enclosed Microchannels. [PDF]
3D Print Addit Manuf, 2023 Chu CH +6 more
europepmc +1 more source
Correction: An SIRS model with nonmonotone incidence and saturated treatment in a changing environment. [PDF]
J Math Biol, 2023 Pan Q, Huang J, Wang H.
europepmc +1 more source