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3,179 results on '"Li, Qingqing"'

115. Biodegradation of Tetracycline Antibiotics by the Yeast Strain Cutaneotrichosporon dermatis M503

Author

Tan, Hao, Kong, Delong, Ma, Qingyun, Li, Qingqing, Zhou, Yiqing, Jiang, Xu, Wang, Zhiye, Parales, Rebecca E, and Ruan, Zhiyong

Subjects
Microbiology, Medical Microbiology, Biomedical and Clinical Sciences, Biological Sciences, tetracycline, biodegradation, Cutaneotrichosporon dermatis, response surface methodology, degradation products, antibacterial potency, Medical microbiology
Abstract

In this study, the Cutaneotrichosporon dermatis strain M503 was isolated and could efficiently degrade tetracycline, doxycycline, and chlorotetracyline. The characteristics of tetracycline degradation were investigated under a broad range of cultural conditions. Response surface methodology (RSM) predicted that the highest degradation rate of tetracycline could be obtained under the following conditions: 39.69 °C, pH of 8.79, and inoculum dose of 4.0% (v/v, ~3.5 × 106 cells/mL in the medium). In accordance with the five identified degradation products of tetracycline, two putative degradation pathways, which included the shedding of methyl and amino groups, were proposed. Moreover, the well diffusion method showed that the strain of M503 decreases the antibacterial potency of tetracycline, doxycycline, and chlorotetracycline. These findings proposed a putative mechanism of tetracycline degradation by a fungus strain and contributed to the estimation of the fate of tetracycline in the aquatic environment.

Published
2022

116. Applications of UWB Networks and Positioning to Autonomous Robots and Industrial Systems

Author

Yu, Xianjia, Li, Qingqing, Queralta, Jorge Peña, Heikkonen, Jukka, and Westerlund, Tomi

Subjects
Computer Science - Robotics
Abstract

Ultra-wideband (UWB) technology is a mature technology that contested other wireless technologies in the advent of the IoT but did not achieve the same levels of widespread adoption. In recent years, however, with its potential as a wireless ranging and localization solution, it has regained momentum. Within the robotics field, UWB positioning systems are being increasingly adopted for localizing autonomous ground or aerial robots. In the Industrial IoT (IIoT) domain, its potential for ad-hoc networking and simultaneous positioning is also being explored. This survey overviews the state-of-the-art in UWB networking and localization for robotic and autonomous systems. We also cover novel techniques focusing on more scalable systems, collaborative approaches to localization, ad-hoc networking, and solutions involving machine learning to improve accuracy. This is, to the best of our knowledge, the first survey to put together the robotics and IIoT perspectives and to emphasize novel ranging and positioning modalities. We complete the survey with a discussion on current trends and open research problems., Comment: 2021 10th Mediterranean Conference on Embedded Computing, Track: CPS&IoT

Published
2021
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117. Towards Better Dialogue Utterance Rewriting via a Gated Span-Copy Mechanism

Author

Li, Qingqing, Kong, Fang, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Iliadis, Lazaros, editor, Papaleonidas, Antonios, editor, Angelov, Plamen, editor, and Jayne, Chrisina, editor

Published
2023
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118. Transition-Based Mention Representation for Neural Coreference Resolution

Author

Li, Qingqing, Kong, Fang, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Huang, De-Shuang, editor, Premaratne, Prashan, editor, Jin, Baohua, editor, Qu, Boyang, editor, Jo, Kang-Hyun, editor, and Hussain, Abir, editor

Published
2023
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119. ABODE-Net: An Attention-based Deep Learning Model for Non-intrusive Building Occupancy Detection Using Smart Meter Data

Author

Luo, Zhirui, Qi, Ruobin, Li, Qingqing, Zheng, Jun, Shao, Sihua, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Qiu, Meikang, editor, Lu, Zhihui, editor, and Zhang, Cheng, editor

Published
2023
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137. Localization in Unstructured Environments: Towards Autonomous Robots in Forests with Delaunay Triangulation

Author

Li, Qingqing, Nevalainen, Paavo, Queralta, Jorge Peña, Heikkonen, Jukka, and Westerlund, Tomi

Subjects
Computer Science - Robotics
Abstract

Autonomous harvesting and transportation is a long-term goal of the forest industry. One of the main challenges is the accurate localization of both vehicles and trees in a forest. Forests are unstructured environments where it is difficult to find a group of significant landmarks for current fast feature-based place recognition algorithms. This paper proposes a novel approach where local observations are matched to a general tree map using the Delaunay triangularization as the representation format. Instead of point cloud based matching methods, we utilize a topology-based method. First, tree trunk positions are registered at a prior run done by a forest harvester. Second, the resulting map is Delaunay triangularized. Third, a local submap of the autonomous robot is registered, triangularized and matched using triangular similarity maximization to estimate the position of the robot. We test our method on a dataset accumulated from a forestry site at Lieksa, Finland. A total length of 2100\,m of harvester path was recorded by an industrial harvester with a 3D laser scanner and a geolocation unit fixed to the frame. Our experiments show a 12\,cm s.t.d. in the location accuracy and with real-time data processing for speeds not exceeding 0.5\,m/s. The accuracy and speed limit is realistic during forest operations.

Published
2020
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148. Analysis and suggestion of sampling inspection of livestock, poultry meat and its by-products and fresh eggs in Shanghai from 2018 to 2020

Author

WENG Shiyu, LI Qingqing, and ZHANG Xinru

Subjects
livestock poultry meat and its by-products and fresh eggs, supervision and inspection, analysis, suggestions, Food processing and manufacture, TP368-456, Nutrition. Foods and food supply, TX341-641
Abstract

ObjectiveThe quality situation and existing problems of livestock， poultry meat and its by-products and fresh eggs in Shanghai from 2018 to 2020 were analyzed.MethodsPublic information on the supervision and sampling of animal-derived food products by the Shanghai Municipal Market Supervision Administration from 2018 to 2020 was collected， and the information was analyzed and summarized.ResultsFrom 2018 to 2020， the intensity of random inspections of livestock， poultry meat and its by-products and fresh eggs increased by about 20% year by year， and the overall quality was basically stable and controllable. The main problem was veterinary drug residues and drug abuse.ConclusionThe results of supervision and sampling inspection showed that the quality awareness of related enterprises needed to be improved， and standardized management was insufficient. Some measures and recommendations for improving the quality and safety have been proposed， such as targeted deployment of monitoring， appropriate increase of punishment， improvement of the traceability system of agricultural product， development and application of vaccines， methods of biological control.

Published
2023
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