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Article ; Online: Is the standardized antibiotic administration ratio (SAAR) ready for prime time?

Yi Guo / Elizabeth Dodds Ashley

Antimicrobial Stewardship & Healthcare Epidemiology, Vol

2023 Volume 3

Abstract: The standardized antibiotic administration ratio (SAAR) enables comparison of antibiotic use (AU) within and between hospitals and identifies target locations and antimicrobials for stewardship interventions. Thousands of institutions have already been ... ...

Abstract	The standardized antibiotic administration ratio (SAAR) enables comparison of antibiotic use (AU) within and between hospitals and identifies target locations and antimicrobials for stewardship interventions. Thousands of institutions have already been submitting AU to the National Healthcare Safety Network. We highlight the benefits and meaningful utilization of SAAR in conjunction with antimicrobial stewardship interventions to improve antimicrobial prescribing in the clinical setting.
Keywords	Infectious and parasitic diseases ; RC109-216 ; Public aspects of medicine ; RA1-1270
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	Cambridge University Press
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Artificial Neural Network Model for the Prediction of Methane Bi-Reforming Products Using CO 2 and Steam

Hao Deng / Yi Guo

Processes, Vol 10, Iss 1052, p

2022 Volume 1052

Abstract: The bi-reforming of methane (BRM) is a promising process which converts greenhouse gases to syngas with a flexible H 2 /CO ratio. As there are many factors that affect this process, the coupled effects of multi-parameters on the BRM product are ... ...

Abstract	The bi-reforming of methane (BRM) is a promising process which converts greenhouse gases to syngas with a flexible H 2 /CO ratio. As there are many factors that affect this process, the coupled effects of multi-parameters on the BRM product are investigated based on Gibbs free energy minimization. Establishing a reliable model is the foundation of process optimization. When three input parameters are changed simultaneously, the resulting BRM products are used as the dataset to train three artificial neural network (ANN) models, which aim to establish the BRM prediction model. Finally, the trained ANN models are used to predict the BRM products when the conditions vary in and beyond the training range to test their performances. Results show that increasing temperature is beneficial to the conversion of CH 4 . When the molar flow of H 2 O is at a low level, the increase in CO 2 can enhance the H 2 generation. While it is more than 0.200 kmol/h, increasing the CO 2 flowrate leads to the increase and then decrease in the H 2 molar flow in the reforming products. When the numbers of hidden layer neurons in ANN models are set as (3, 3), (3, 6) and (6, 6), all the correlation coefficients of training, validation and test are higher than 0.995. When these ANN models are used to predict the BRM products, the variation range of the prediction error becomes narrower, and the standard deviation decreases with the increase in neuron number. This demonstrates that the ANN model with more neurons has a higher accuracy. The ANN model with neuron numbers of (6, 6) can be used to predict the BRM products even when the operating conditions are beyond the training ranges, demonstrating that this model has good extension performance. This work lays the foundation for an artificial intelligent model for the BRM process, and established ANN models can be further used to optimize the operating parameters in future work.
Keywords	methane reforming ; syngas production ; artificial neural network model ; prediction ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
Subject code	620 ; 290
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Research on the influence on the addendum-shortened-coefficient of the first-last teeth of incomplete driving gear to avoid interference

Rui Hu / Hougen Luo / Chunxia Xu / Yi Guo / Yue Yang

Heliyon, Vol 10, Iss 2, Pp e23996- (2024)

2024

Abstract: In order to ensure the normal transmission of incomplete gears without interference during the process of gear meshing. This research first establishes the theoretical model to explore the influence of the reference circle pressure angle (α), the ... ...

Abstract	In order to ensure the normal transmission of incomplete gears without interference during the process of gear meshing. This research first establishes the theoretical model to explore the influence of the reference circle pressure angle (α), the addendum modification coefficient, and the number of teeth on the addendum-shortened-coefficient (σ) of the incomplete driving gear's first-last teeth, and then systematically explores the influence between the key factors and the decrease of σ. The results show that: (1) When the pressure angle of the driven gear addendum circle (αa2) and the maximum critical value of the addendum radius of the driving gear to avoid interference (ra1') increases with the increase of α, σ decreases with the increase of α; (2) In the cases of high-modification gear transmission and angular-modification gear transmission, there are five conditions in which σ decreases due to the addendum modification coefficient of driving gear (x1) and the addendum modification coefficient of driven gear (x2): 1) High-modification gear transmission with one case:① x1+x2=0, x1=−x2≠0 with the increase of x2, that is: x1 and x2 are opposite number; 2) Angular-modification gear transmission with other four cases: ② x1+x2<0, x1<0 with x2=0, that is: The driving and driven gears are negative-modified and standard gears, respectively; ③ x1+x2>0, x1=0 with x2>0, that is: The driving and driven gears are standard and positive-modified gears, respectively; ④ x1+x2<0, x1≠0, x2≠0 with the increase of x2, that is: The sum of x1 and x2 are negative and neither of them is zero, there exist three kinds of addendum modification gears for the driving and driven gear, which are positive-negative, negative-positive and negative-negative. ⑤ x1+x2>0, x1≠0, x2≠0 with the increase of x2, that is: The sum of x1 and x2 are positive and neither of them is zero, there exist three kinds of addendum modification gears for the driving and driven gear, which are positive-negative, negative-positive and ...
Keywords	Incomplete gear ; First-last teeth ; Addendum-shortened-coefficient ; Reference circle pressure angle ; Addendum modification coefficient ; Number of teeth ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Subject code	535
Language	English
Publishing date	2024-01-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: End-to-end decentralized formation control using a graph neural network-based learning method

Chao Jiang / Xinchi Huang / Yi Guo

Frontiers in Robotics and AI, Vol

2023 Volume 10

Abstract: Multi-robot cooperative control has been extensively studied using model-based distributed control methods. However, such control methods rely on sensing and perception modules in a sequential pipeline design, and the separation of perception and ... ...

Abstract	Multi-robot cooperative control has been extensively studied using model-based distributed control methods. However, such control methods rely on sensing and perception modules in a sequential pipeline design, and the separation of perception and controls may cause processing latencies and compounding errors that affect control performance. End-to-end learning overcomes this limitation by implementing direct learning from onboard sensing data, with control commands output to the robots. Challenges exist in end-to-end learning for multi-robot cooperative control, and previous results are not scalable. We propose in this article a novel decentralized cooperative control method for multi-robot formations using deep neural networks, in which inter-robot communication is modeled by a graph neural network (GNN). Our method takes LiDAR sensor data as input, and the control policy is learned from demonstrations that are provided by an expert controller for decentralized formation control. Although it is trained with a fixed number of robots, the learned control policy is scalable. Evaluation in a robot simulator demonstrates the triangular formation behavior of multi-robot teams of different sizes under the learned control policy.
Keywords	distributed multi-robot control ; multi-robot learning ; graph neural network ; formation control and coordination ; autonomous robots ; Mechanical engineering and machinery ; TJ1-1570 ; Electronic computers. Computer science ; QA75.5-76.95
Subject code	629
Language	English
Publishing date	2023-11-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Calibration of Structured Light Scanning System

Yi Guo / Xiaoyi Ruan

International Journal of Advanced Network, Monitoring, and Controls, Vol 6, Iss

2021 Volume 2

Keywords	Camera Calibration ; Point Cloud Stitching ; Dental Model ; Three-Dimensional Measurement ; Computer engineering. Computer hardware ; TK7885-7895 ; Electronic computers. Computer science ; QA75.5-76.95
Language	English
Publishing date	2021-07-01T00:00:00Z
Publisher	Exeley Inc.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Control Strategies for Piston Trajectory in Ionic Compressors for Hydrogen Storage

Yi Guo / Yuming Tang / Junhao Cao / Anna Diao / Xueyuan Peng

Applied Sciences, Vol 13, Iss 21, p

2023 Volume 11759

Abstract: The ionic compressor is a new and prospective technology applied for hydrogen storage which adopts a hydraulic system in which the hydraulic drive unit is a solid piston in the compression cavity. Controlling the trajectory of the solid piston is ... ...

Abstract	The ionic compressor is a new and prospective technology applied for hydrogen storage which adopts a hydraulic system in which the hydraulic drive unit is a solid piston in the compression cavity. Controlling the trajectory of the solid piston is critical for achieving the designed thermodynamic process of compression. However, a strategy for controlling the position of a piston in an ionic compressor has not been reported in the open literature. In this paper, three valve-controlled methodologies are proposed for the effective control of a piston’s trajectory in an ionic compressor. A transient numerical model of the entire compression system was built using AMESim 2021 software. The performances of the proposed control methods were simulated and compared. The results show that the maximum isothermal efficiency, 50.28%, was obtained in the system using Position-P control, for which the highest hydrogen discharge mass for a single compression cycle of 1.14 g, a relatively low specific energy consumption of 2395.17 J/g, and a relatively small velocity control error of 0.32 m/s were observed. Although the lowest specific energy consumption was found in the case of the Dual-PS control method, the smallest mass product was also found for this case. Therefore, the Position-S control strategy was identified as the optimal method for a hydraulically driven ionic liquid compressor system.
Keywords	hydrogen energy ; ionic compressor ; hydraulic system ; control strategy ; system design ; AMESim simulation ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Subject code	670
Language	English
Publishing date	2023-10-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Spatial and temporal characteristics of carbon emission and sequestration of terrestrial ecosystems and their driving factors in mainland China—a case study of 352 prefectural administrative districts

Jingyuan Lin / Yi Guo / Jiayan Li / Ming Shao / Peng Yao

Frontiers in Ecology and Evolution, Vol

2023 Volume 11

Abstract: IntroductionGlobal climate change, increase in human activities, and prominence of ecological issues have led to uneven quantitative and spatial distributions of carbon emission and sequestration of terrestrial ecosystems. Such uneven distributions can ... ...

Abstract	IntroductionGlobal climate change, increase in human activities, and prominence of ecological issues have led to uneven quantitative and spatial distributions of carbon emission and sequestration of terrestrial ecosystems. Such uneven distributions can lead to more negative impacts on the natural environment and human living conditions.MethodsTherefore, based on the carbon neutralization policy, we conducted geographically weighted regression (GWR) modeling in this study using panel data from 352 Chinese prefectural administrative districts in 2000, 2005, 2010, and 2017 to analyze and determine the impact factors and their spatial distribution for carbon emission and sequestration of terrestrial ecosystems.ResultsOur results showed that total population (TP), per capita gross domestic product (GDP) (PCG), proportion of secondary industry output (PSIO), scale of urban built-up area (SUB), green space proportion in city areas (GSP), normalized difference vegetation index (NDVI), and temperature (TEM) are factors driving carbon sequestration and carbon emission. The spatial distribution of these driving factors in mainland China is: (1) TP showed a negative correlation to carbon emission in most areas, while it exhibited a positive correlation to carbon sequestration in the southern, southwestern, and western parts of northwest China; however, in all other areas, TP showed a negative correlation with carbon sequestration; (2) PCG was positively correlated to carbon emission in most areas of China and to carbon sequestration in southwest, south, central, and northeast China; however, PCG demonstrated a negative correlation to carbon sequestration in the remaining areas; (3) PSIO and SUB presented a positive correlation to carbon emission and a negative correlation to carbon sequestration in most areas; (3) In contrast, GSP showed a negative correlation to carbon emission and a positive correlation to carbon sequestration in most areas; (5)NDVI showed a negative correlation to carbon emission and carbon sequestration ...
Keywords	carbon emission ; carbon sequestration ; terrestrial ecosystems ; driving factors ; spatial and temporal characteristics ; Evolution ; QH359-425 ; Ecology ; QH540-549.5
Subject code	333
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Research on Characteristics of Economic Development and Environmental Pollution in Typical Energy Regions

Jinghui Chen / Yiying Liang / Bo Yang / Yun Ma / Yi Guo

Sustainability, Vol 15, Iss 14186, p

2023 Volume 14186

Abstract: The data on economic development quality and environmental pollution intensity from 2001 to 2021 was selected by taking Shanxi province, a typical energy region of the country, as the research object was analyzed in the evolution characteristics of ... ...

Abstract	The data on economic development quality and environmental pollution intensity from 2001 to 2021 was selected by taking Shanxi province, a typical energy region of the country, as the research object was analyzed in the evolution characteristics of economic development quality and environmental pollution intensity in Shanxi province over the past two decades by using linear regression, numerical fitting, and Pearson correlation coefficient, and was explored on their mutual relationship. The results show that Shanxi province has made long-term progress in economic development since 2001, with GDP increasing nearly 10 times and maintaining an average annual growth of about 7%. The main pollutants in the last 20 show a trend of steady change, first ascending and then descending, with the turning point occurring in the 12th Five-Year Plan period (2011–2015), which shows that the environmental policies and investments made by China and Shanxi governments in the last 10 years of the new era have taken effect. The results of the numerical fitting curve suggest that the per capita GDP shows a classical inverted “U” curve relationship with wastewater and SO 2 emissions, respectively. The turning point occurs at around 20,000 yuan per capita GDP, while the relationship between chemical oxygen demand and ammonia nitrogen emissions is monotonically decreasing. The relationship with solid waste generation is monotonically increasing without the turning point. The results of the correlation analysis further supported the conclusion of the fitted curve.
Keywords	environmental pollution ; numerical fitting ; economic growth ; industrial three wastes ; sustainable development ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
Subject code	339
Language	English
Publishing date	2023-09-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: A power allocation strategy for fuel cell ship considering fuel cell performance difference

Wei Cao / Pan Geng / Xiaoyan Xu / Yi Guo / Zhanxin Ma

Scientific Reports, Vol 13, Iss 1, Pp 1-

2023 Volume 14

Abstract: Abstract This paper focuses on designing a power allocation strategy for a fuel cell ship. The performance of the fuel cell varies during operation, so a power allocation strategy considering fuel cell performance differences is proposed, which consists ... ...

Abstract	Abstract This paper focuses on designing a power allocation strategy for a fuel cell ship. The performance of the fuel cell varies during operation, so a power allocation strategy considering fuel cell performance differences is proposed, which consists of two layers. In the first layer, the maximum power and maximum efficiency of each fuel cell system (FCS) are updated in real-time with an online parameter identification model, which is composed of the fuel cell semi-empirical model and adaptive Kalman filter. The second layer takes the state of charge of the battery energy storage system, the maximum power, and the maximum efficiency as inputs for power allocation. Compared with the equal allocation strategy and daisy chain strategy, the total hydrogen consumption reduces by 5.3% and 15.1% and the total output power of the FCS with poor performance reduces by 14.1% and 15.7%. The results show that the proposed method can improve the efficiency of the ship power system and reduce the operational burden of the FCS with poor performance.
Keywords	Medicine ; R ; Science ; Q
Subject code	620
Language	English
Publishing date	2023-06-01T00:00:00Z
Publisher	Nature Portfolio
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Three new species of Homatula (Teleostei

Xu Li / Bo Yang / Yi Guo / Wei Zhou

PLoS ONE, Vol 17, Iss

Nemacheilidae) from Yunnan, China, with comments on habitat conservation

2022 Volume 11

Abstract: Based on the morphological comparisons and molecular results, three new species of Homatula, i.e., H. geminusclathratus sp. nov., H. microcephala sp. nov., and H. longibarbatus sp. nov., have been described and named from the Lancang-jiang (the upper ... ...

Abstract	Based on the morphological comparisons and molecular results, three new species of Homatula, i.e., H. geminusclathratus sp. nov., H. microcephala sp. nov., and H. longibarbatus sp. nov., have been described and named from the Lancang-jiang (the upper Mekong River) and the Chuan-he (the upper Black River, a tributary of the Red River) basins. The loaches of Homatula from the Lancang-jiang and the Chuan-he can be distinguished via morphology, genetics, and geographic distribution. All of the 10 recorded species distributed in the Nu-jiang (the upper Salween River), the Lancang-jiang, and the upper Black River share the following combination of character states: whole body, except head, densely scaled; lateral line complete; and a short adipose crest along the dorsal midline of the caudal peduncle, anteriorly not reaching vertically through the anal-fin origin. Species with these characters are called the densely-scaled group of Homatula. The three newly described species belong to the densely-scaled group of Homatula. Based on molecular phylogenetics, these Homatula species form a monophyletic group that can be divided into two clades, the densely-scaled group and the non-densely-scaled group. The densely-scaled group of Homatula includes 13 species occurring between the Nu-jiang and the upper Black River. The non-densely-scaled group is non-monophyletic and includes 14 species that are distributed in the Red, Pearl, Yangtze, and Yellow River basins. Species of the non-densely-scaled group are clustered into four sub-clades that are constrained to the four river basins. Homatula exclusively inhabits mountain streams with rapid or gentle currents, vauclusian springs, underground rivers connected to streams, and ditches near villages and farmland. No specimens of Homatula were collected from the main streams of Lixian-jiang, Lancang-jiang, and Nu-jiang as well as their large tributaries. Small environmental changes in the habitat of Homatula, such as water pollution or extensive human use, can lead to ...
Keywords	Medicine ; R ; Science ; Q
Subject code	590
Language	English
Publishing date	2022-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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