Results 41 to 50 of about 489,424 (343)

Photovoltaic mismatch losses caused by moving clouds

Solar Energy, 2017
Abstract Mismatch losses is a major issue in the photovoltaic (PV) system and are mainly caused by partial shading; largest mismatch losses are caused by sharp shadows. These shadows are a typical problem for rooftop and residential installations.
Kari Lappalainen, Seppo Valkealahti
openaire   +3 more sources

Security proof of practical quantum key distribution with detection-efficiency mismatch

Physical Review Research, 2021
Quantum key distribution (QKD) protocols with threshold detectors are driving high-performance QKD demonstrations. The corresponding security proofs usually assume that all physical detectors have the same detection efficiency.
Yanbao Zhang, Patrick J. Coles, Adam Winick, Jie Lin, Norbert Lütkenhaus   +4 more
doaj   +1 more source

Addressing the Loss-Metric Mismatch with Adaptive Loss Alignment

, 2019
In most machine learning training paradigms a fixed, often handcrafted, loss function is assumed to be a good proxy for an underlying evaluation metric. In this work we assess this assumption by meta-learning an adaptive loss function to directly optimize the evaluation metric.
Huang, Chen, Zhai, Shuangfei, Talbott, Walter, Bautista, Miguel Angel, Sun, Shih-Yu, Guestrin, Carlos, Susskind, Josh   +6 more
openaire   +2 more sources

Genetic attenuation of ALDH1A1 increases metastatic potential and aggressiveness in colorectal cancer

Molecular Oncology, EarlyView.
Aldehyde dehydrogenase 1A1 (ALDH1A1) is a cancer stem cell marker in several malignancies. We established a novel epithelial cell line from rectal adenocarcinoma with unique overexpression of this enzyme. Genetic attenuation of ALDH1A1 led to increased invasive capacity and metastatic potential, the inhibition of proliferation activity, and ultimately ...
Martina Poturnajova, Zuzana Kozovska, Ondrej Pos, Kristina Pavlov, Sachin Gulati, Peter Makovicky, Kristina Jakic, Monika Burikova, Eva Sedlackova, Barbora Svitkova, Silvia Tyciakova, Vojtech Bystry, Nicolas Blavet, Boris Tichy, Matej Hrnciar, Jaroslav Budis, Miroslav Tomas, Peter Dubovan, Georgina Kolnikova, Veronika Repaska, Nikoleta Mojzesova, Eva Zomborska, Daniel Pindak, Michal Mego, Tomas Szemes, Miroslava Matuskova   +25 more
wiley   +1 more source

Calculation of Site Attenuation for Calculable Dipole Antennas [PDF]

Journal of Electromagnetic Engineering and Science, 2020
This paper presents a method for calculating the site attenuation (SA) of an open-area test site (OATS) for a pair of calculable dipole antennas with a 3-dB hybrid balun in the frequency range of 30 MHz to 1 GHz.
Ki-Chai Kim, Hyuk-Jun Seo, Tae-Weon Kang, Jae-Yong Kwon, Jeong-Hwan Kim   +4 more
doaj   +1 more source

The eleven antenna: a compact low-profile decade bandwidth dual polarized feed for reflector antennas [PDF]

, 2006
A novel dual polarized ultrawide-band (UWB) feed with a decade bandwidth is presented for use in both single and dual reflector antennas. The feed has nearly constant beam width and 11 dBi directivity over at least a decade bandwidth.
Kildal, Per-Simon, Olsson, Rikard, Weinreb, Sander   +2 more
core   +1 more source

Clustering Algorithm Reveals Dopamine‐Motor Mismatch in Cognitively Preserved Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore the relationship between dopaminergic denervation and motor impairment in two de novo Parkinson's disease (PD) cohorts. Methods n = 249 PD patients from Parkinson's Progression Markers Initiative (PPMI) and n = 84 from an external clinical cohort.
Rachele Malito, Chiara Meneghini, Alice Galli, Luca Gallo, Pierfrancesco Mitrotti, Paola Dimartino, Marianna Inglese, Cinzia Zatti, Alessandro Lupini, Andrea Pilotto, Alessandro Padovani, Micol Avenali, Enza Maria Valente, Cristina Tassorelli, Silvia P. Caminiti   +14 more
wiley   +1 more source

LambdaFM: Learning Optimal Ranking with Factorization Machines Using Lambda Surrogates [PDF]

, 2016
State-of-the-art item recommendation algorithms, which apply Factorization Machines (FM) as a scoring function and pairwise ranking loss as a trainer (PRFM for short), have been recently investigated for the implicit feedback based context-aware ...
Chen, Long, Guo, Guibing, Jose, Joemon M., Yu, Haitao, Yuan, Faije, Zhang, Weinan   +5 more
core   +1 more source

Assessing the sensitivity and the clinical impact of the 2023 ACR/EULAR classification criteria in Obstetric Antiphospholid Syndrome: findings from a multicenter Italian cohort with a long‐term follow‐up

Arthritis Care &Research, Accepted Article.
Objective To evaluate the sensitivity of the 2023 ACR/EULAR classification criteria for antiphospholipid syndrome (APS) in a real‐world cohort of women diagnosed with primary obstetric APS (oAPS), and to assess their ability to identify patients at risk of future pregnancy complications.
Francesca Ruffilli, Cecilia Nalli, Francesca Crisafulli, Carlo Garaffoni, Marcello Govoni, Giulia Voltarel, Alba C. Pozzi, Beatrice Maranini, Ettore Silvagni, Alessandra Bortoluzzi, Angela Tincani   +10 more
wiley   +1 more source

Mitigation of mismatch losses in solar PV systems: a hybrid L-shaped propagated array configuration approach

Frontiers in Energy Research
There has been a global expansion of solar electricity during the past decades. Solar photovoltaic (PV) electricity generation is not only simple but also environmentally benign and cost-effective.
Belqasem Aljafari, S. Devakirubakaran, Praveen Kumar Balachandran, Sudhakar Babu Thanikanti   +3 more
doaj   +1 more source