Results 11 to 20 of about 1,724,790 (267)

On greedy heuristics for computing D-efficient saturated subsets [PDF]

Operations Research Letters, 2020
Let $\mathcal{F}$ be a set consisting of $n$ real vectors of dimension $m \leq n$. For any saturated, i.e., $m$-element, subset $\mathcal{S}$ of $\mathcal{F}$, let $\mathrm{vol}(\mathcal{S})$ be the volume of the parallelotope formed by the vectors of $\mathcal{S}$.
Radoslav Harman, Samuel Rosa
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Evaluating R&D efficiency of China’s listed lithium battery enterprises [PDF]

Frontiers of Engineering Management, 2022
AbstractPromoting the growth of the lithium battery sector has been a critical aspect of China’s energy policy in terms of achieving carbon neutrality. However, despite significant support on research and development (R&D) investments that have resulted in increasing size, the sector seems to be falling behind in technological areas.
Bai, S., Bi, X., Han, Chunjia, Zhou, Q., Shang, W., Yang, Mu, Wang, L., Ieromonachouc, P., He, H.   +8 more
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Structural Characteristics, Stability, and Electronic Properties of 001 Surface with Point Defects of Zinc Stannate: A First-Principle Study

Inorganics, 2022
This work presents first-principles calculations on the surface and defect impact upon zinc stannate (ZS) materials with perovskite bulk structures. The structure and electronic properties of both a perfect 001 surface and surfaces with a point defect of
Jun Li, Meilin Zhu, Rou Feng, Yingjie Yuan, Zewei Fu, Liangliang Meng, Yingwu Wang, Ying Zhou, Hui Zhang, Hongcun Bai   +9 more
doaj   +1 more source

Transforming drug discovery: the impact of AI and molecular simulation on R&D efficiency. [PDF]

Bioanalysis
The process of developing new drugs in the pharmaceutical industry is both time-consuming and costly, making efficiency crucial. Recent advances in hardware and computational methods have led to the widespread application of computational science approaches in drug discovery. These approaches, including artificial intelligence and molecular simulations,
Iwata H.
europepmc   +4 more sources

Hedge fund activism, R&D efficiency and firm value

Research in International Business and Finance, 2023
We investigate the effectiveness of hedge fund activism in addressing inefficient R&D investment and creating long-term value at target firms. Using an endogenous growth model to estimate efficient R&D investment levels, we find target firms exhibit a tendency to overinvest in R&D.
Watson, Justin, How, Janice, Verhoeven, Peter   +2 more
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Effects of voltage variation on heat and stress distributions in the electrochromic glass

Results in Engineering, 2023
Electrochromic glass has been used in many applications, such as the building envelope, because its light filtration can be adjusted in a controllable manner using low input energy.
Watit Pakdee, Chuleekorn Chotsuwan
doaj   +1 more source

Highly D‑efficient Weighing Design and Its Construction [PDF]

Acta Universitatis Lodziensis. Folia Oeconomica, 2018
In this paper, some aspects of design optimality on the basis of spring balance weighing designs are considered. The properties of D‑optimal and D‑efficiency designs are studied. The necessary and sufficient conditions determining the mentioned designs and some new construction methods are introduced.
Ceranka, Bronisław, Graczyk, Małgorzata   +1 more
openaire   +4 more sources

Urban energy assessment by means of simulation techniques

Techne, 2018
Current trends in energy consumption and greenhouse emissions make energy problems in cities take special importance. This situation has led to evaluate different urban configurations that combine the reduction of the energy demands with the optimization
Silvia Soutullo, Jose Antonio Ferrer, Maria del Rosario Heras   +2 more
doaj   +1 more source

Effects of Ultrasonic Dispersion Energy on the Preparation of Amorphous SiO2 Nanomaterials for In Vitro Toxicity Testing

Nanomaterials, 2018
Synthetic amorphous silica (SAS) constitute a large group of industrial nanomaterials (NM). Based on their different production processes, SAS can be distinguished as precipitated, fumed, gel and colloidal.
Martin Wiemann, Antje Vennemann, Michael Stintz, Rodrigo R. Retamal Marín, Frank Babick, Gottlieb-Georg Lindner, Tobias B. Schuster, Ulrich Brinkmann, Nils Krueger   +8 more
doaj   +1 more source

Highly D-Efficient Designs with Nonnegatively Correlated Observations

Revstat Statistical Journal, 2017
In the most difficult case where the number of observations n ≡ 3 (mod 4), high D-efficiency of certain chemical balance weighing designs under completely symmetric covariance matrix of errors is shown. It is also proved that D-optimal design may depend on the values of the correlation coefficient.
Krystyna Katulska, Lukasz Smaga
openaire   +2 more sources