Multiplicatively convex functions

Results 141 to 150 of about 3,067,533 (204)

Does the Adoption of Improved Cassava Varieties Boost Productivity in Ghana? The Role of Technology, Management, and Structural Gaps

World Food Policy, Volume 12, Issue 2, November 2026.
ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
wiley +1 more source

Improvement of a Regional Multiscale NLS‐4DVar Assimilation System Based on the CWRF‐CoLM Coupled Model

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 11, November 2026.
Abstract Ensemble perturbations in 4DEnVar‐type methods are pulled in two directions at once: estimating a reliable background‐error covariance (BEC) calls for perturbations large enough to sample real error structure, while a valid tangent‐linear (TL) approximation calls for perturbations small enough to stay near‐linear.
Hongqin Zhang, Xiangjun Tian, Yinhai Luo, Nan Wei +3 more
wiley +1 more source

A Vignetting Correction Method for Remote Sensing Images Based on Low-Rank Modeling and Polynomial Fitting. [PDF]

J Imaging
Zhao X, Hu Z, Xu Z.
europepmc +1 more source

Mission‐Aligned Learning‐Informed Control of Autonomous Systems: Formulation and Foundations

Expert Systems, Volume 43, Issue 11, November 2026.
ABSTRACT Research, innovation and practical capital investment have been increasing rapidly toward the realization of autonomous physical agents. This includes industrial and service robots, unmanned aerial vehicles, embedded control devices, and a number of other realizations of cybernetic/mechatronic implementations of intelligent autonomous devices.
Vyacheslav Kungurtsev +7 more
wiley +1 more source

A Note on Local Polynomial Regression for Time Series in Banach Spaces

Journal of Time Series Analysis, Volume 47, Issue 6, Page 1124-1138, November 2026.
ABSTRACT This work extends local polynomial regression to Banach space‐valued time series for estimating smoothly varying means and their derivatives in non‐stationary data. The asymptotic properties of both the standard and bias‐reduced Jackknife estimators are analyzed under mild moment conditions, establishing their convergence rates.
Florian Heinrichs
wiley +1 more source

TMPA-HC: a two-stage heterogeneous multi-population algorithm with cooperative search for high-dimensional feature selection. [PDF]

Sci Rep
Chen A, Pan P, Quan N, Zhou B.
europepmc +1 more source

Robust Estimation and Inference for Time‐Varying Unconditional Volatility

Journal of Time Series Analysis, Volume 47, Issue 6, Page 1139-1152, November 2026.
ABSTRACT We derive a general and robust estimator of a large class of parametric specifications of time‐varying unconditional volatility of financial returns, both univariate and multivariate, and establish the Consistency and Asymptotic Normality (CAN) of the estimator.
Adam Lee, Rickard Sandberg, Genaro Sucarrat +2 more
wiley +1 more source

Interpolating with generalized Assouad dimensions. [PDF]

J Geom Anal
Banaji A, Rutar A, Troscheit S.
europepmc +1 more source

Selector form of Weaver's conjecture and frame sparsification

Proceedings of the London Mathematical Society, Volume 133, Issue 5, November 2026.
Abstract We show an extension of a probabilistic result of Marcus, Spielman, and Srivastava, which resolved the Kadison–Singer problem, to block diagonal positive semidefinite random matrices. We use this result to show several selector results, which generalize their partition counterparts.
Marcin Bownik
wiley +1 more source

Modeling information demand in the framework of probabilistic reasoning. [PDF]

Commun Psychol
Jiwa MW, Gottlieb J.
europepmc +1 more source

multiplicative calculus
non-newtonian calculus