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Article ; Online: High altitude balloon testing of Arduino and environmental sensors for CubeSat prototype.

Lay, Kenjiro S / Li, Lingqi / Okutsu, Masataka

HardwareX

2022 Volume 12, Page(s) e00329

Abstract: CubeSats were conceived with an aim to provide students with hands-on, design, build, and test experiences on spacecraft. Many education-class CubeSats keep the cost of the projects low with the use of commercial off-the-shelf (COTS) products. But using ... ...

Abstract	CubeSats were conceived with an aim to provide students with hands-on, design, build, and test experiences on spacecraft. Many education-class CubeSats keep the cost of the projects low with the use of commercial off-the-shelf (COTS) products. But using parts not designed for space missions often means a compromise in performance (e.g., low sensor accuracy, low power efficiency) and reliability, which makes component testing a necessary part of the development process. Unfortunately, there is no single lab equipment that can test the integrated features of CubeSats, including the radio communication over ranges of altitudes and distances. It has been pointed out that a high altitude reached by a weather balloon offers an environment similar to the space environment. This paper describes a balloon flight testing of Arduino and sensors for a CubeSat "prototype"-a preliminary mock-up model used for hardware selection and validation during the initial building phase. Atmospheric pressures and temperatures were measured throughout the balloon flight. The measured pressures were validated by comparing Arduino's pressure altitudes against the GPS altitudes, and the measured temperatures were assessed against the standard atmosphere model.
Language	English
Publishing date	2022-06-16
Publishing country	England
Document type	Journal Article
ISSN	2468-0672
ISSN (online)	2468-0672
DOI	10.1016/j.ohx.2022.e00329
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Article ; Online: Ultrashort-term responses of riparian vegetation restoration to adjacent cycles of ecological water conveyance scheduling in a hyperarid endorheic river basin.

Li, Lingqi / Jiang, Enhui / Yin, Huijuan / Wu, Kai / Dong, Guotao

Journal of environmental management

2022 Volume 320, Page(s) 115803

Abstract: The management of ecological water conveyance (EWC) can allow riparian vegetation communities to survive the threat of degradation in hyperarid inland areas and promote the health of groundwater-recharged riparian ecosystems. However, the ultrashort-term ...

Abstract	The management of ecological water conveyance (EWC) can allow riparian vegetation communities to survive the threat of degradation in hyperarid inland areas and promote the health of groundwater-recharged riparian ecosystems. However, the ultrashort-term effects of periodic EWC scheduling on riparian vegetation remain unclear. This study explored the spatiotemporal differentiation in species structure (herbs, shrubs, and trees), diversity (measured by the Simpson, Shannon-Wiener, Pielou, and Margalef indices), stability (evaluated via Godron fitting distances and abundance-biomass comparison curves), and integrity (proxied by the vegetation-based index of biotic integrity) of vegetation communities in the downstream Heihe River Basin, China. Empirical orthogonal function, Pearson correlation, canonical correspondence analysis (CCA), and partial CCA methods were used to evaluate the effects of dominant habitat environmental factors from the hydrogeographic features, soil physicochemical properties, and anthropogenic impacts. The results showed that the riparian vegetation community diversity, stability, and integrity varied moderately to slightly with hierarchical distance from near wetlands (<200 m; containing mainly herbs) to far desert edges (>800 m; occupied by shrubs/subshrubs). The middle transition zone (200-800 m; occupied mostly by trees/subtrees) had the best diversity and integrity but relatively poor stability. The most significant influencing factors were EWC and soil moisture. The simple diversity, fair-level integrity, and disturbed but not irreversibly damaged stability of the vegetation community were generally improved by 14.82%, 20.33%, and 30.57%, respectively, in the pre-EWC period but worsened in the post-EWC period. The difference in spatially distributed EWC quantities caused more apparent vegetation restoration in high water-supplied subareas where certain biological community instability existed. Therefore, adequate EWC management can be considered a prerequisite for the maintenance of high richness and structural stability in local communities and requires a good balance between interregional vegetation abundance and enhanced environmental tolerance.
MeSH term(s)	Ecosystem ; Rivers/chemistry ; Soil ; Trees ; Water ; Wetlands
Chemical Substances	Soil ; Water (059QF0KO0R)
Language	English
Publishing date	2022-08-07
Publishing country	England
Document type	Journal Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2022.115803
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Article ; Online: Physical reservoirs based on MoS

Li, Lingqi / Xiang, Heng / Zheng, Haofei / Chien, Yu-Chieh / Duong, Ngoc Thanh / Gao, Jing / Ang, Kah-Wee

Nanoscale horizons

2024 Volume 9, Issue 5, Page(s) 752–763

Abstract: Reservoir computing (RC), a variant of recurrent neural networks (RNNs), is well-known for its reduced energy consumption through exclusive focus on training the output weight and its superior performance in handling spatiotemporal information. ... ...

Abstract	Reservoir computing (RC), a variant of recurrent neural networks (RNNs), is well-known for its reduced energy consumption through exclusive focus on training the output weight and its superior performance in handling spatiotemporal information. Implementing these networks in hardware requires devices with superior fading memory behavior. Unlike filament-based two-terminal devices, those relying on ferroelectric switching demonstrate improved voltage reliability, while three-terminal transistors provide additional active control. HfO
Language	English
Publishing date	2024-04-29
Publishing country	England
Document type	Journal Article
ISSN	2055-6764
ISSN (online)	2055-6764
DOI	10.1039/d3nh00524k
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Article: The Extraction of Coupling-of-Modes Parameters in a Layered Piezoelectric Substrate and Its Application to a Double-Mode SAW Filter.

Li, Lingqi / Zhang, Qiaozhen / Yang, Yang / Li, Baichuan / Tian, Yahui / Zhao, Xiangyong / Fu, Sulei

Micromachines

2023 Volume 14, Issue 12

Abstract: This paper presents an advanced method that combines coupling-of-modes (COM) theory and the finite element method (FEM), which enables the quick extraction of COM parameters and the accurate prediction of the electroacoustic and temperature behavior of ... ...

Abstract	This paper presents an advanced method that combines coupling-of-modes (COM) theory and the finite element method (FEM), which enables the quick extraction of COM parameters and the accurate prediction of the electroacoustic and temperature behavior of surface acoustic wave (SAW) devices. For validation, firstly, the proposed method is performed for a normal SAW resonator. Then, the validated method is applied to analysis of an I.H.P. SAW resonator based on a 29°YX-LT/SiO
Language	English
Publishing date	2023-12-03
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2620864-7
ISSN	2072-666X
ISSN	2072-666X
DOI	10.3390/mi14122205
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Article: Evaluation of Regional Water-Saving Level Based on Support Vector Machine Optimized by Genetic Algorithm

Zhang, Wenge / Hou, Shengling / Yin, Huijuan / Li, Lingqi / Wu, Kai

Water. 2022 Aug. 25, v. 14, no. 17

2022

Abstract: The evaluation of regional water-saving level can provide scientific theoretical support for steadily promoting the implementation of a national water-saving priority strategy. Referring to the water consumption statistics of 31 provinces (except Hong ... ...

Abstract	The evaluation of regional water-saving level can provide scientific theoretical support for steadily promoting the implementation of a national water-saving priority strategy. Referring to the water consumption statistics of 31 provinces (except Hong Kong, Macao and Taiwan) in China in 2018, 14 easily accessible and comprehensive indexes were selected to establish an index system of regional water-saving level and a water-saving level evaluation model based on support vector machine optimized by genetic algorithm (GA-SVM) was constructed to analyze the national regional water-saving level from different perspectives. The results showed that the water-saving level in China presented a spatial distribution characteristic with Beijing City, Henan Province and Zhejiang Province as the center and gradually decreased outward. From the perspective of regionalization, the water-saving level in North China, Central China and Southeast China was higher, while the water-saving level in Northwest China, Southwest China and Northeast China need to be improved. Therefore, the national water-saving level is generally at a medium level and effective water-saving work and water-saving schemes should be carried out according to different regions and industries.
Keywords	models ; statistics ; support vector machines ; water ; water conservation ; China ; Macau ; Taiwan
Language	English
Dates of publication	2022-0825
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
ZDB-ID	2521238-2
ISSN	2073-4441
ISSN	2073-4441
DOI	10.3390/w14172615
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Article: Ultrashort-term responses of riparian vegetation restoration to adjacent cycles of ecological water conveyance scheduling in a hyperarid endorheic river basin

Li, Lingqi / Jiang, Enhui / Yin, Huijuan / Wu, Kai / Dong, Guotao

Journal of environmental management. 2022 Oct. 15, v. 320

2022

Abstract	The management of ecological water conveyance (EWC) can allow riparian vegetation communities to survive the threat of degradation in hyperarid inland areas and promote the health of groundwater-recharged riparian ecosystems. However, the ultrashort-term effects of periodic EWC scheduling on riparian vegetation remain unclear. This study explored the spatiotemporal differentiation in species structure (herbs, shrubs, and trees), diversity (measured by the Simpson, Shannon–Wiener, Pielou, and Margalef indices), stability (evaluated via Godron fitting distances and abundance-biomass comparison curves), and integrity (proxied by the vegetation-based index of biotic integrity) of vegetation communities in the downstream Heihe River Basin, China. Empirical orthogonal function, Pearson correlation, canonical correspondence analysis (CCA), and partial CCA methods were used to evaluate the effects of dominant habitat environmental factors from the hydrogeographic features, soil physicochemical properties, and anthropogenic impacts. The results showed that the riparian vegetation community diversity, stability, and integrity varied moderately to slightly with hierarchical distance from near wetlands (<200 m; containing mainly herbs) to far desert edges (>800 m; occupied by shrubs/subshrubs). The middle transition zone (200–800 m; occupied mostly by trees/subtrees) had the best diversity and integrity but relatively poor stability. The most significant influencing factors were EWC and soil moisture. The simple diversity, fair-level integrity, and disturbed but not irreversibly damaged stability of the vegetation community were generally improved by 14.82%, 20.33%, and 30.57%, respectively, in the pre-EWC period but worsened in the post-EWC period. The difference in spatially distributed EWC quantities caused more apparent vegetation restoration in high water-supplied subareas where certain biological community instability existed. Therefore, adequate EWC management can be considered a prerequisite for the maintenance of high richness and structural stability in local communities and requires a good balance between interregional vegetation abundance and enhanced environmental tolerance.
Keywords	correspondence analysis ; ecological restoration ; habitats ; plant communities ; riparian vegetation ; soil water ; watersheds ; China
Language	English
Dates of publication	2022-1015
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2022.115803
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Reliable Memristor Crossbar Array Based on 2D Layered Nickel Phosphorus Trisulfide for Energy-Efficient Neuromorphic Hardware.

Weng, Zhengjin / Zheng, Haofei / Li, Lingqi / Lei, Wei / Jiang, Helong / Ang, Kah-Wee / Zhao, Zhiwei

Small (Weinheim an der Bergstrasse, Germany)

2023 Volume 20, Issue 5, Page(s) e2304518

Abstract: Designing reliable and energy-efficient memristors for artificial synaptic arrays in neuromorphic computing beyond von Neumann architecture remains a challenge. Here, memristors based on emerging layered nickel phosphorus trisulfide ( ... ...

Abstract	Designing reliable and energy-efficient memristors for artificial synaptic arrays in neuromorphic computing beyond von Neumann architecture remains a challenge. Here, memristors based on emerging layered nickel phosphorus trisulfide (NiPS
Language	English
Publishing date	2023-09-26
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2168935-0
ISSN	1613-6829 ; 1613-6810
ISSN (online)	1613-6829
ISSN	1613-6810
DOI	10.1002/smll.202304518
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Article ; Online: Coupled Ferroelectric-Photonic Memory in a Retinomorphic Hardware for In-Sensor Computing.

Duong, Ngoc Thanh / Shi, Yufei / Li, Sifan / Chien, Yu-Chieh / Xiang, Heng / Zheng, Haofei / Li, Peiyang / Li, Lingqi / Wu, Yangwu / Ang, Kah-Wee

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

2024 Volume 11, Issue 12, Page(s) e2303447

Abstract: The development of all-in-one devices for artificial visual systems offers an attractive solution in terms of energy efficiency and real-time processing speed. In recent years, the proliferation of smart sensors in the growth of Internet-of-Things (IoT) ... ...

Abstract	The development of all-in-one devices for artificial visual systems offers an attractive solution in terms of energy efficiency and real-time processing speed. In recent years, the proliferation of smart sensors in the growth of Internet-of-Things (IoT) has led to the increasing importance of in-sensor computing technology, which places computational power at the edge of the data-flow architecture. In this study, a prototype visual sensor inspired by the human retina is proposed, which integrates ferroelectricity and photosensitivity in two-dimensional (2D) α-In
Language	English
Publishing date	2024-01-17
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2808093-2
ISSN	2198-3844 ; 2198-3844
ISSN (online)	2198-3844
ISSN	2198-3844
DOI	10.1002/advs.202303447
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Article: Evaluating Runoff-Sediment Relationship Variations Using Generalized Additive Models That Incorporate Reservoir Indices for Check Dams

Li, Lingqi / Wu, Kai / Jiang, Enhui / Yin, Huijuan / Wang, Yuanjian / Tian, Shimin / Dang, Suzhen

Water resources management. 2021 Sept., v. 35, no. 11

2021

Abstract: The effects of check dam reservoirs on variations in hydrological regimes commonly result in nonlinear runoff-sediment relationships, which are difficult to describe using current reservoir indicators, particularly for watersheds where floods rise ... ...

Abstract	The effects of check dam reservoirs on variations in hydrological regimes commonly result in nonlinear runoff-sediment relationships, which are difficult to describe using current reservoir indicators, particularly for watersheds where floods rise rapidly and huge sediment loads occur. In this study, the evolution of the runoff-sediment relationship was investigated through tests for tendencies and abrupt changes in the Xiliu Valley, a typical hyperconcentrated tributary of the Upper Yellow River on the Northern Loess Plateau, China. Generalized additive models (GAMs) were used to simulate runoff and sediment loads as smooth functions of significant physical covariates including reservoir indices. In comparison with the existing reservoir index (RI) and its additional version (ARI), a sediment-associated reservoir index (SARI) was developed to highlight the advantages of more information on reservoir capacities for both flood control and sediment deposition. The results showed significant downward trends in both annual runoff and sediment series. Alterations in runoff-sediment relationships appeared in approximately 1990, and were mostly dominated by the factors of short-duration storm floods and check dams. GAMs including the SARI exerted more negative effects on sediment yield than on runoff and outperformed the models embracing the RI or ARI. Accordingly, incorporation of the SARI could be advocated under changing environments that are mainly influenced by check dams.
Keywords	administrative management ; evolution ; flood control ; runoff ; sediment deposition ; sediment yield ; sediments ; storms ; China ; Yellow River
Language	English
Dates of publication	2021-09
Size	p. 3845-3860.
Publishing place	Springer Netherlands
Document type	Article
ZDB-ID	59924-4
ISSN	1573-1650 ; 0920-4741
ISSN (online)	1573-1650
ISSN	0920-4741
DOI	10.1007/s11269-021-02928-x
Database	NAL-Catalogue (AGRICOLA)

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Article: Distribution and release of perfluorinated compounds (PFCs) in water-sediment systems: The effect of confluence channels

Liu, Xiaodong / Li, Lingqi / Gu, Li / Hua, Zulin / Zhang, Yuan / Xue, Hongqin

Science of the total environment. 2021 June 25, v. 775

2021

Abstract: Perfluorinated compounds (PFCs) released from sediment contribute to pollution in rivers. Considerable research has been conducted on submerged bottom sediment in long, straight channels. However, less attention has been paid to the junction of a plain ... ...

Abstract	Perfluorinated compounds (PFCs) released from sediment contribute to pollution in rivers. Considerable research has been conducted on submerged bottom sediment in long, straight channels. However, less attention has been paid to the junction of a plain river network where the hydrodynamic disturbance of confluence dominates. To date, the release mechanism of PFCs in confluence channels has not been revealed quantitatively. In this study, we carried out a series of flume experiments to evaluate the effect of varied discharge ratios of mainstream and tributary waters on the efflux of PFCs from sediment. The results demonstrate that the convergence of tributary water can affect the mainstream water significantly. The two most obvious features are the separation zone and the maximum velocity zone. The release of PFCs in sediment is correlated with the flow velocity. The discharge in the separation zone is low, and the discharge in the maximum velocity zone is high. The release of PFCs in water bodies, including the true soluble phase, colloid phase, and particle phase, increase with an increase to the discharge ratio. Perfluorooctanoic acid (PFOA) is more widely distributed in the true dissolved phase, and perfluorooctane sulfonate (PFOS) dominates in the colloid and particle phases. Our results indicate that the variation of PFCs in sediment is strongly correlated with the hydrodynamic partition. This study provides a scientific basis for regulating PFC transport at river channel confluences.
Keywords	environment ; hydraulic flumes ; hydrodynamics ; perfluorooctane sulfonic acid ; perfluorooctanoic acid ; pollution ; rivers ; sediments
Language	English
Dates of publication	2021-0625
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2021.145720
Database	NAL-Catalogue (AGRICOLA)

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