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Massive MIMO Networks: Spectral, Energy, and Hardware Efficiency
Foundations and Trends® in Signal Processing, 2018Massive multiple-input multiple-output MIMO is one of themost promising technologies for the next generation of wirelesscommunication networks because it has the potential to providegame-changing improvements in spectral efficiency SE and ...
Emil Björnson +2 more
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Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
, 1961In order to find an upper theoretical limit for the efficiency of p‐n junction solar energy converters, a limiting efficiency, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination ...
W. Shockley, H. Queisser
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Single‐Junction Organic Photovoltaic Cell with 19% Efficiency
Advances in Materials, 2021Improving power conversion efficiency (PCE) is important for broadening the applications of organic photovoltaic (OPV) cells. Here, a maximum PCE of 19.0% (certified value of 18.7%) is achieved in single‐junction OPV cells by combining material design ...
Yong Cui +14 more
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Knowing efficiency: the enactment of efficiency in efficiency auditing
Accounting, Organizations and Society, 1999Abstract This paper reports an ethnographic study of the activities of auditors in the field as they work to fulfil an efficiency auditing mandate; it analyses how auditors report on efficiency in practice. Miller and Rose's work on governmentality ( Miller & Rose (1990) . Governing economic Life.
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Is it efficient to analyse efficiency rankings? [PDF]
Empirical Economics, 2000 When production functions are estimated as frontier functions, the deviations from the frontier can be interpreted as individual inefficiency estimates. Unfortunately, it has recently been shown that efficiency differences across individuals are very often statistically insignificant. In this paper, we will analyse the consequences of the consideration
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Single‐Junction Organic Photovoltaic Cells with Approaching 18% Efficiency
Advances in Materials, 2020Optimizing the molecular structures of organic photovoltaic (OPV) materials is one of the most effective methods to boost power conversion efficiencies (PCEs).
Yong Cui +13 more
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Nature Biotechnology, 2006 Manufacturing jobs may be shifting from the large drug companies to contract organizations as firms re-evaluate their strengths. But scientists with analytical skills and an eye for efficiency can find a job transforming materials into medicines.
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Journal of Economic Theory, 2008
We consider a population of agents, either finite or countably infinite, located on an arbitrary network. Agents interact directly only with their immediate neighbors, but are able to observe the behavior of (some) other agents beyond theirinteraction neighborhood, and learn from that behavior by imitatingsuccessful actions.
Alós-Ferrer, Carlos +1 more
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We consider a population of agents, either finite or countably infinite, located on an arbitrary network. Agents interact directly only with their immediate neighbors, but are able to observe the behavior of (some) other agents beyond theirinteraction neighborhood, and learn from that behavior by imitatingsuccessful actions.
Alós-Ferrer, Carlos +1 more
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Molecular Optimization Enables over 13% Efficiency in Organic Solar Cells.
Journal of the American Chemical Society, 2017A new polymer donor (PBDB-T-SF) and a new small molecule acceptor (IT-4F) for fullerene-free organic solar cells (OSCs) were designed and synthesized.
Wenchao Zhao +6 more
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On the efficient synthesis of efficient programs
Computer Compacts, 1983Abstract Efficiency is a problem in automatic programming—both in the programs produced and in the synthesis process itself. The efficiency problem arises because many target-language programs (which vary in their time and space performance) typically satisfy one abstract specification. This paper presents a framework for using analysis and searching
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