Results 21 to 30 of about 799,220 (268)

Certified Efficient Global Roundness Evaluation

Journal of Optimization Theory and Applications, 2020
AbstractWe propose and analyze a global search algorithm for the computation of the minimum zone sphericity (circularity) error of a given set. The formulation is valid in any dimension and covers both finite sets of data points as well as infinite sets like polygonal chains or triangulations of surfaces. We derive theoretical estimates for the cost to
Schöpfer, Frank, Chernov, Alexey
openaire   +2 more sources

Exploratory Research to Improve Energy-Efficiency of a Ground-Coupled Heat Pump Utilizing an Automatic Control Device of Circulation Pump Speed

Energies, 2020
Ground-coupled heat pumps (GCHPs) are an efficient thermal energy production system that can satisfy the gap between heating and air-conditioning. Be that as it may, exploratory research on GCHPs is still lacking.
Ioan Sarbu, Calin Sebarchievici
doaj   +1 more source

A comparative study of satellite altimetry-based and DEM-based methods for estimating lake water volume changes

Water Science and Technology
This study compared two different methods, the satellite altimetry-based and DEM (digital elevation model)-based, for estimating lake water volume changes.
Haotian Li, Jun Chen, Liguo Cao, Wei Liu, Zheng Duan   +4 more
doaj   +1 more source

Towards a conceptualization of a social efficiency notion in management sciences

Ekonomia i Prawo, 2020
Motivation: In the past, economic efficiency was a key criterion for assessing different types of activities undertaken by various organizations. It has been noticed that acquiring economic efficiency cannot be the only goal, and efficiency notion has ...
Tadeusz A. Grzeszczyk, Jacek Pełszyński   +1 more
doaj   +1 more source

Investment Project Efficiency Evaluation [PDF]

Interdisciplinary Management Research, 2006
Financial efficiency of investment project is being evaluated in this paper. It is showed that the net present value function is constant and that quota value is equal to c0 when i converges to the infinite. Optimal rates i are analyzed in certain cases and everything is illustrated through examples.
Miljenko Crnjac, Dominika Crnjac
openaire   +2 more sources

Efficiently Degrading RhB Using Bimetallic Co₃O₄/ZnO Oxides: Ultra-Fast and Persistent Activation of Permonosulfate

Molecules
To address the issues of poor Co2+ regeneration and limited interfacial electron transfer in heterogeneous catalytic systems, this study proposes the synthesis of highly efficient and stable Co3O4/ZnO composites through the pyrolysis–oxidation reaction ...
Bai Sun, Rui Liu, Fengshou Zhao, Shengnan He, Yun Wang, Xiangxiang Wang, Hao Huang, Mingjian Yi, Shuguang Zhu   +8 more
doaj   +1 more source

Equilibrium analysis for prosumer’s participation in joint electricity and carbon markets

Energy Reports, 2023
The current electricity system has a large number of carbon emissions. As an environmentally friendly and low-carbon electricity generation source, distributed energy sources gradually get more and more attention.
Zhenyu Wang, Haijing Zhang, Weihao Yin, Xiaobin Sun, Liangliang Zhu, Jianxiao Wang   +5 more
doaj   +1 more source

Cellular Energy Efficiency Evaluation Framework

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
In order to quantify the energy savings in wireless networks, the power consumption of the entire system needs to be captured and an appropriate energy efficiency evaluation framework must be defined. In this paper, the necessary enhancements over existing performance evaluation frameworks are discussed, such that the energy efficiency of the entire ...
Auer G., Giannini V., Godor I., Skillermark P., Olsson M., Imran M.A., Sabella D., Gonzalez M.J., Desset C., Blume O.   +9 more
openaire   +3 more sources

The HIT Network for Children and Adolescents With CNS Tumors Facilitates Improvements of Diagnostic Assessments, Multimodal Treatments, Individual Counseling, and Research in Germany, Austria, and Switzerland

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background The HIT network was established in 2000 to create a population‐based structure aiming to improve survival rates and reduce late effects for children with central nervous system (CNS) tumors by conducting comprehensive clinical trials.
Stefan Rutkowski, Michael C. Frühwald, Gudrun Fleischhack, Stephan Tippelt, Pablo Hernáiz‐Driever, Olaf Witt, Astrid Gnekow, Christof Kramm, Matthias Eyrich, Johannes E. A. Wolf, Hermann Müller, Carsten Friedrich, Uwe R. Kordes, Denise Obrecht‐Sturm, Petra Ketteler, Barbara von Zezschwitz, Pascal Johann, Dominik Sturm, Karoline Nemes, Stefan Schönberger, Till Milde, Brigitte Bison, Monika Warmuth‐Metz, Torsten Pietsch, Ulrich Schüller, Arend Koch, David Capper, Martin Hasselblatt, Christian Thomas, Christian Hagel, Stefan M. Pfister, Felix Sahm, David T. W. Jones, Martin U. Schuhmann, Jürgen Krauss, Pedram Emami, Ahmed El Damaty, Rolf D. Kortmann, Rudolf Schwarz, Jürgen Debus, Mechthild Krause, Fabian Pohl, Holger Ottensmeier, Lisa Bußenius, Katja Baust, Andreas Faldum, Cecile Ronckers, Desiree Grabow, Martin Benesch, Thomas Perwein, Karin Dieckmann, Irene Slavc, Johannes Gojo, Nicolas U. Gerber, André O. von Bueren, Katrin Scheinemann, Gabriele Calaminus, Beate Timmermann, Ulrich‐Wilhelm Thomale, Martin Mynarek   +59 more
wiley   +1 more source

Optimization model for distributed energy trading based on a market value allocation mechanism in the electricity spot market

Frontiers in Energy Research
This study proposes a novel distributed energy trading market model with a value distribution mechanism to optimize the allocation and transactions of distributed energy resources (DERs).
Baohua Hu, Baohua Hu, Sheng Ding, Sheng Ding, Zhaoyang Xu, Zhaoyang Xu, Xueting Cheng, Xueting Cheng, Liangliang Zhu, Liangliang Zhu, Yueshuang Bao, Yueshuang Bao, Kui Wang, Kui Wang   +13 more
doaj   +1 more source