Results 61 to 70 of about 407,065 (213)

Letter to Alfred H. Buck from L. Buck, 1877 September 22

, 1877
A handwritten letter to Alfred H. Buck from L. Buck (sister) regarding the crops, dated September 22, 1877.Archival master image scanned in reflective mode as 48-bit RGB color TIFF using Epson 11000XL. Display image is 8-bit 150 dpi JPG, quality rating 8,
Buck, L.
core   +1 more source

Robust Mean–Variance Portfolio Optimization: Mean–Variance–Variance Criterion Versus Mean–Variance–Standard Deviation Criterion

Mathematical Finance, EarlyView.
ABSTRACT We study a dynamic portfolio optimization problem under the mean–variance–variance (M‐V‐V) criterion proposed by Maccheroni et al. It is an analogue of the Arrow–Pratt approximation to the well‐known smooth ambiguity model. Under the standard Black–Scholes framework, we derive fully explicit equilibrium investment strategies in which a DM's ...
David Landriault, Bin Li, Yuanyuan Zhang
wiley   +1 more source

Letter to Alfred H. Buck from Frank Buck, 1870 February 26

, 1870
A handwritten letter to Alfred H. Buck from Frank Buck regarding seeing old friends, dated February 26, 1870.Archival master image scanned in reflective mode as 48-bit RGB color TIFF using Epson 11000XL. Display image is 8-bit 150 dpi JPG, quality rating
Buck, Frank
core   +1 more source

Adaptive Importance Sampling Estimation of an Open Economy Model With Fiscal Policy

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT We propose and estimate an open economy general equilibrium model that includes international trade between Canada and the United States. We estimate our model using a new adaptive methodology based on the mixture of student's t$$ t $$ by Importance Sampling weighted Expectation–Maximisation (MitISEM).
Stefano Grassi, Marco Lorusso, Francesco Ravazzolo   +2 more
wiley   +1 more source

A Two‐Way Coupled Simulation Framework for the Prediction of Fire‐Induced Damage and Smoke Propagation in a Building

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.
ABSTRACT The contribution is concerned with a fully coupled simulation methodology for fire‐induced damage in concrete structures. Fire events in buildings not only generate high temperatures and the spreading of smoke gases but also induce significant structural damages of the concrete structure.
A. Palani, C. Kandekar, W. E. Weber, M. Breuer   +3 more
wiley   +1 more source

Proposal, Analysis and Experimental Verification of Nonisolated DC-DC Converters Conceived from an Active Switched-Capacitor Commutation Cell

Eletrônica de Potência, 2019
This paper introduces a new family of nonisolated dc-dc converters that are generated by the integration of the active switched-capacitor (ASCC) and the conventional commutation cell (CCC). Based on the commutation cell concept, the new conceived hybrid
Mauricio Dalla Vecchia, Jéssika Melo de Andrade, Neilor Colombo Dal Pont, André Luís Kirsten, Telles Brunelli Lazzarin   +4 more
doaj   +1 more source

Time-sharing power supply full-bridge buck mode dual-input DC-DC converter

Dianzi Jishu Yingyong, 2020
In the distributed generation system with multiple new energy joint supply, using a multi-input DC-DC converter instead of multiple single input DC-DC converters can simplify the circuit structure and reduce the cost.
Li Zhaoqin, Chen Daolian
doaj   +1 more source

A Modified Non-Isolated Buck Converter Using Zsource Topology

2026 IEEE 2nd International Conference on Quantum Photonics, Artificial Intelligence & Networking (QPAIN)
The Z-Source Buck topology is used in this study to investigate the methods used to configure a DC-DC converter. In the modern power industry, efficient energy conversion is critical due to the challenges of ineffective power transformation. Compared to conventional Z-Source and Buck converters, the proposed design achieves higher efficiency and output
Al Hossain, Md. Abdullah, Alvy, Md. Asif Imties, Manzurul, Md. Hasan, Mofazzal, Md. Hossain   +3 more
openaire   +2 more sources

Research on a High-Efficiency LED Driving Circuit Based on Buck Topology

Circuits and Systems, 2011
A high efficiency LED(Light Emitting Diode) driver based on Buck converter, which could operate under a wide AC input voltage range(85V~265V) and drive a series of high power LEDs, is presented in this paper. The operation principles, power loss factors of the LED driver in this study are analyzed and discussed in detail and some effective ways to ...
Renbo Xu, Hongjian Li, Yongzhi Li, Changqian Zhang   +3 more
openaire   +3 more sources

A bristle‐nosed Jurassic ray‐finned fish (Actinopterygii) bears true dermal odontodes on its snout

Journal of Anatomy, Volume 249, Issue 5, Page 1021-1032, November 2026.
Teeth show extreme diversity, including tooth‐like dermal odontodes or “skin teeth” in many extant fishes. We describe the anatomy of enlarged tubercles on the snout of Redfieldius, an extinct early Jurassic fish. We found that the tubercles in Redfieldius are dermal odontodes that evolved independently from those of living species. Abstract Comparison
Jack Stack, Ben T. Kligman, Maranda L. Stricklin   +2 more
wiley   +1 more source