Results 1 to 10 of about 194,441 (268)

Deep Deterministic Policy Gradient Algorithm Based on Mean of Multiple Estimators [PDF]

Zhengzhou Daxue xuebao. Gongxue ban, 2022
In order to solve the underestimation problem of the twin delayed deep deterministic policy gradient algorithm in the reinforcement learning actor-critic framework, deep determinstic policy gradient based on mean of multiple estimators(DDPG-MME) was ...
LI Lin, LI Yuze, ZHANG Yujia, WEI Wei
doaj   +1 more source

Effect of near-surface winds on the measurement of forest soil CO2 fluxes using closed air chambers

Frontiers in Ecology and Evolution, 2023
Forest soil CO2 flux measurements are important for studying global climate change. Current monitoring methods are based on closed gas chambers, which block the wind pumping effect of near-surface winds in the measurements, resulting in biased values ...
Junjie Jiang, Junjie Jiang, Junguo Hu, Junguo Hu, Junguo Hu, Xiaojun Xu, Xiaojun Xu, Xiaojun Xu, Yongfu Li, Yongfu Li, Yongfu Li, Jie Sheng   +11 more
doaj   +1 more source

Implications for Validation of IMERG Satellite Precipitation in a Complex Mountainous Region

Remote Sensing, 2023
Satellite-based precipitation retrievals such as the Integrated Multi-satellite Retrievals for Global Precipitation Measurement (IMERG), provide alternative data in mountainous regions.
Luhan Li, Xuelong Chen, Yaoming Ma, Wenqing Zhao, Hongchao Zuo, Yajing Liu, Dianbin Cao, Xin Xu   +7 more
doaj   +1 more source

Knowing the unknown: The underestimation of monkeypox cases. Insights and implications from an integrative review of the literature

Frontiers in Microbiology, 2022
Monkeypox is an emerging zoonotic disease caused by the monkeypox virus, which is an infectious agent belonging to the genus Orthopoxvirus. Currently, commencing from the end of April 2022, an outbreak of monkeypox is ongoing, with more than 43,000 cases
Nicola Luigi Bragazzi, Woldegebriel Assefa Woldegerima, Sarafa Adewale Iyaniwura, Qing Han, Xiaoying Wang, Aminath Shausan, Kingsley Badu, Patrick Okwen, Cheryl Prescod, Michelle Westin, Andrew Omame, Andrew Omame, Manlio Converti, Bruce Mellado, Bruce Mellado, Jianhong Wu, Jude Dzevela Kong   +16 more
doaj   +1 more source

Neglecting the neglected during the COVID-19 pandemic: the case of leptospirosis in Sri Lanka [PDF]

Epidemiology and Health, 2022
The coronavirus disease 2019 (COVID-19) pandemic has disrupted global health systems and affected the transmission dynamics as well as the surveillance of other infectious diseases. This study described the probable effect of the COVID-19 pandemic on the
Janith Warnasekara, Suneth Agampodi
doaj   +1 more source

Multiple Papillomas of the Breast: A Review of Current Evidence and Challenges

Journal of Imaging, 2022
Objectives: To conduct a review of evidence about papillomatosis/multiple papillomas (MP), its clinical and imaging presentation, the association between MP and malignancy and the management strategies that follow.
Rossella Rella, Giovanna Romanucci, Damiano Arciuolo, Assunta Scaldaferri, Enida Bufi, Sebastiano Croce, Andrea Caulo, Oscar Tommasini   +7 more
doaj   +1 more source

How different microfilters affect the recovery of eleven EU-regulated mycotoxins

Arhiv za Higijenu Rada i Toksikologiju, 2023
Microfiltration is a common step in liquid chromatography – tandem mass spectrometry (LC-MS), a method of choice in determining several mycotoxins in a solution at once.
Tomas Marija Kovač, Mijatović Anto, Nevistić Mateja Bulaić, Šarkanj Bojan, Babić Jurislav, Kovač Tihomir   +5 more
doaj   +1 more source

Underestimation of biogenic silica sinking flux due to dissolution in sediment traps: A case study in the South China Sea

Frontiers in Marine Science, 2022
The dissolved silicate concentrations in the supernatant of sediment trap sampling bottles retrieved from deep water (1000-3000 m) at four stations in the South China Sea (SCS) were measured to calculate the underestimated flux of biogenic silica (bSi ...
Wen Liang, Wen Liang, Lihua Ran, Lihua Ran, Lihua Ran, Zhi Yang, Martin G. Wiesner, Yuzhao Liang, Yuzhao Liang, Lin Sun, Jianfang Chen, Jianfang Chen   +11 more
doaj   +1 more source

Breast Lesions Diagnosed as Ductal Carcinoma In Situ by Ultrasound-Guided Core Needle Biopsy: Risk Predictors for Concomitant Invasive Carcinoma and Axillary Lymph Node Metastasis

Frontiers in Oncology, 2021
BackgroundThe major concern over preoperatively diagnosed ductal carcinoma in situ (DCIS) of breast via ultrasound-guided core needle biopsy (US-CNB) is the risk of missing concomitant invasive carcinoma.
Yanbiao Liu, Xu Wang, Ang Zheng, Xinmiao Yu, Zining Jin, Feng Jin   +5 more
doaj   +1 more source

EARTHEN ARCHITECTURE – VALORISATION AND UNDERESTIMATION [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Earthen architecture has been used as a construction material in most of the world for millennia. According to the United Nations, approximately one third of the world population and half of the population of developing countries live in buildings ...
N. Barbacci
doaj   +1 more source