Results 101 to 110 of about 16,710 (257)
Determinantal inequalities for positive definite matrices [PDF]
, 1993 We consider the problem of identifying all determinantal inequalities valid on all positive definite matrices. This is fundamentally a combinatorial problem about relations between collections of index sets.
Johnson, Charles R., Barrett, Wayne W.
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Seasonal Fluctuations of Plastochromanol‐8 and α‐Tocopherol Amounts in the Leaves of Cecropia Trees
Journal of the American Oil Chemists' Society, EarlyView.ABSTRACT Plastochromanol‐8 (PC‐8) is a homologue of γ‐tocotrienol with a longer side chain (eight instead of three isoprene units) and therefore also a representative of the tocochromanol (vitamin E) group. PC‐8 has been determined in various plants and seeds, with Cecropia sp. leaves showing unusually high levels.
Rosalie Ormos, Jörg Rau, Walter Vetter
wiley +1 more source
Lq averaging for symmetric positive-definite matrices [PDF]
, 2015 We propose a method to find the Lq mean of a set of symmetric positive-definite (SPD) matrices, for 1≤q ≤2. Given a set of points, the Lq mean is defined as a point for which the sum of q-th power of distances to all the given points is minimum. The
Hartley, Richard, Aftab, Khurrum
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Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs
The Anatomical Record, EarlyView.Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada +5 more
wiley +1 more source
Asian Journal of Control, EarlyView.Abstract The linear‐quadratic regulator (LQR) problem of optimal control of an uncertain discrete‐time linear system (DTLS) is revisited in this paper from the perspective of Tikhonov regularization. We show that an optimally chosen regularization parameter reduces, compared to the classical LQR, the values of a scalar error function, as well as the ...
Fernando Pazos, Amit Bhaya
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British Journal of Clinical Pharmacology, EarlyView.Aim This study aimed to compare how Norwegian healthcare professionals (HCPs) and consumers reported the same adverse event (AE) following immunization with vaccines against COVID‐19 during the COVID‐19 pandemic. Specifically, we aimed to compare the extent to which HCPs and consumers reported information relevant for assessing the causal relationship ...
Tommy Emil Dzus +4 more
wiley +1 more source
Axioms, 2018 This work studies limited memory preconditioners for linear symmetric positive definite systems of equations. Connections are established between a partial Cholesky factorization from the literature and a variant of Quasi-Newton type preconditioners ...
Benedetta Morini
doaj +1 more source
Model‐Enabled Knowledge Transfer Across Cell Lines, Culture Scales and Conditions
Biotechnology and Bioengineering, EarlyView.ABSTRACT Mechanistic models are central to quantitative understanding and optimization of Chinese hamster ovary (CHO) cell culture processes, but their utility is often restricted by parameter sets calibrated for specific cell lines, scales, or operating conditions.
Luxi Yu +2 more
wiley +1 more source
A Class of Positive Definite Completion Problem for Partial Positive Definite Toeplitz Matrices [PDF]
, 2002 摘要: 并不是所有的部分正定Toeplitz 矩阵都有Toeplitz 正定完成,也并不是每个有正定完成的部分正定矩阵都有 Toeplitz 正定完成. 我们考虑一类部分正定Toeplitz 矩阵的Toeplitz 正定完成问题. Abstract : Not every partial positive definite Toeplitz matrix has Toeplitz positive definite completion and not every par2 tial positive ...
何明, 卢琳璋
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Business Strategy and the Environment, EarlyView.ABSTRACT Environmental sustainability in supply chains is no longer considered a compliance concern. It has become a strategic capability challenge, as firms seek to use Generative artificial intelligence (Gen‐AI) to improve decision quality, resource efficiency and responsible operations.
Anbesh Jamwal +3 more
wiley +1 more source