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Article ; Online: Dynamic simulation of land use and land cover and its effect on carbon storage in the Nanjing metropolitan circle under different development scenarios

Yu Tao / Lei Tian / Chun Wang / Wen Dai

Frontiers in Ecology and Evolution, Vol

2023 Volume 11

Abstract: Land use and land cover (LULC) change is a pattern of alteration of the Earth’s land surface cover by human society and have a significant impact on the terrestrial carbon cycle. Optimizing the distribution of LULC is critical for the redistribution of ... ...

Abstract	Land use and land cover (LULC) change is a pattern of alteration of the Earth’s land surface cover by human society and have a significant impact on the terrestrial carbon cycle. Optimizing the distribution of LULC is critical for the redistribution of land resources, the management of carbon storage in terrestrial ecosystems, and global climate change. We integrated the patch-generating land use simulation (PLUS) model and integrated valuation of ecosystem services and trade-offs (InVEST) model to simulate and assess future LULC and ecosystem carbon storage in the Nanjing metropolitan circle in 2030 under four scenarios: natural development (ND), economic development (ED), ecological protection (EP), and collaborative development (CD). The results showed that (1) LULC and carbon storage distribution were spatially heterogenous in the Nanjing metropolitan circle for the different scenarios, with elevation, nighttime lights, and population being the main driving factors of LULC changes; (2) the Nanjing metropolitan circle will experience a carbon increase of 0.50 Tg by 2030 under the EP scenario and losses of 1.74, 3.56, and 0.48 Tg under the ND, ED, and CD scenarios, respectively; and (3) the CD scenario is the most suitable for the development of the Nanjing metropolitan circle because it balances ED and EP. Overall, this study reveals the effects of different development scenarios on LULC and ecosystem carbon storage, and can provide a reference for policymakers and stakeholders to determine the development patterns of metropolitan areas under a dual carbon target orientation.
Keywords	carbon storage ; land use and land cover ; scenario simulation ; PLUS model ; InVEST model ; Nanjing metropolitan circle ; Evolution ; QH359-425 ; Ecology ; QH540-549.5
Subject code	710
Language	English
Publishing date	2023-02-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Performance evaluation of surrogate models for simulating multiphase NAPL transport in heterogeneous aquifers

Litang Hu / Menglin Zhang / Lei Tian / Shiqi Huang

Hydrology Research, Vol 54, Iss 12, Pp 1573-

2023 Volume 1589

Abstract: A better understanding of the distribution of nonaqueous phase liquid (NAPL) plumes is of great importance to groundwater pollution remediation and control. However, the efficiency of surrogate models in simulating the transport is still not well ... ...

Abstract	A better understanding of the distribution of nonaqueous phase liquid (NAPL) plumes is of great importance to groundwater pollution remediation and control. However, the efficiency of surrogate models in simulating the transport is still not well addressed. Selecting a leakage problem as an example, 50 sets of random permeability distributions are generated using the Monte Carlo method, and a numerical model is used to obtain benchmark data of NAPL transport. Four machine learning methods are employed to simulate dense NAPL transport under point leakage sources across spatiotemporal scales. The validation of the models demonstrate that the random forest model can also effectively capture the spatial-temporal distribution of the plume in heterogeneous aquifers, with a maximum mean absolute error and root mean square error smaller than 5.55 × 10−4 and 5.88 × 10−5, respectively. Meanwhile, the multiple phase outcome from the random forest model fits well with the numerical results under the scenarios of linear leakage sources and light NAPL transport. The total time consumed in the computation is reduced by over 150 times after using the surrogate models. The results suggest that surrogate models can provide a promising way to understand NAPL transport in heterogeneous aquifers. HIGHLIGHTS Numerical solutions provided the NAPL transport benchmark dataset under different scenarios.; Four ML models were trained to capture DNAPL transport across the spatial-temporal scales.; The RF model had the best performance in reproducing multiphase transport in terms of both the accuracy and calculation efficiency.; Surrogate models provided promising applicability to quickly and effectively evaluate NAPL transport.;
Keywords	heterogeneous aquifers ; multicomponent multiple phases flow ; napl ; random forest method ; tmvoc ; River ; lake ; and water-supply engineering (General) ; TC401-506 ; Physical geography ; GB3-5030
Subject code	380
Language	English
Publishing date	2023-12-01T00:00:00Z
Publisher	IWA Publishing
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: sQuiz your knowledge! A nodule on the toe of a child

Ni, Yao / Liu, Yi / Lei, Tian-Bing

European journal of dermatology : EJD

2023 Volume 32, Issue 6, Page(s) 818–820

Title translation	sQuiz your knowledge! A nodule on the toe of a child.
Language	English
Publishing date	2023-02-27
Publishing country	France
Document type	Journal Article
ZDB-ID	1128666-0
ISSN	1952-4013 ; 1167-1122
ISSN (online)	1952-4013
ISSN	1167-1122
DOI	10.1684/ejd.2022.4388
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Article ; Online: CO

Wang, Shanshan / Lei, Tian / Liu, Leilei / Tan, Zhijian

Food chemistry

2023 Volume 432, Page(s) 137255

Abstract: Hesperidin, also known as vitamin P, is widely studied for its distinctive potential in food and pharmaceutical industries. This work focuses on the research of ... ...

Abstract	Hesperidin, also known as vitamin P, is widely studied for its distinctive potential in food and pharmaceutical industries. This work focuses on the research of CO
MeSH term(s)	Hesperidin ; Carbon Dioxide ; Citrus sinensis ; Deep Eutectic Solvents ; Flavonoids
Chemical Substances	Hesperidin (E750O06Y6O) ; Carbon Dioxide (142M471B3J) ; Deep Eutectic Solvents ; Flavonoids
Language	English
Publishing date	2023-08-22
Publishing country	England
Document type	Journal Article
ZDB-ID	243123-3
ISSN	1873-7072 ; 0308-8146
ISSN (online)	1873-7072
ISSN	0308-8146
DOI	10.1016/j.foodchem.2023.137255
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Article ; Online: Effects of atorvastatin combined with trimetazidine on cardiac function, inflammatory factors and endothelial function in patients with coronary artery disease

Lei Tian

Journal of Hainan Medical University, Vol 22, Iss 14, Pp 19-

2016 Volume 22

Abstract: Objective: To investigate the effects of atorvastatin combined with trimetazidine on cardiac function, inflammatory factors and endothelial function in patients with coronary artery disease. Method: A total of 164 patients with coronary artery disease ... ...

Abstract	Objective: To investigate the effects of atorvastatin combined with trimetazidine on cardiac function, inflammatory factors and endothelial function in patients with coronary artery disease. Method: A total of 164 patients with coronary artery disease were collected and randomly divided into observation group (n=83) and control group (n=81). Control group were given trimetazidine with conventional symptomatic treatments, and observation group were given atorvastatin on the basis of control group. The cardiac function, inflammatory factors and endothelial function were compared between two groups. Result: No significantly differences were found in all indexes before treatment between two groups. After different treatments, left ventricular ejection fraction (LVEF) in both group increased significantly. The left ventricular diastolic dimension (LVDD), total cholesterol (TC) and low densith lipoprotein cholesterol (LDL-C) decreased significantly. LVEF in observation group was significantly higher, while TC and LDL-C were significantly lower than that in control group. High sensitive C reactive protein (hsCRP), tumornecrosis factor-毩 (TNF-毩), matrix metalloproteinase-9 (MMP-9) and malondialdehyde (MDA) decreased significantly after treatment. All inflammatory factors in observation group were lower than that in control group. Endothelin-1 (ET-1) decreased significantly after treatment, but nitrie oxide (NO) and circulating endothelial microparticles (cEMPs) increased significantly. ET-1 in observation group was lower, while NO and cEMPs were significantly higher than that in control group. Conclusion: Atorvastatin combined with trimetazidine can effectively improve the cardiac function, reduce the level of inflammatory factors and improve the endothelial function in patients with coronary artery disease.
Keywords	Atorvastatin ; Trimetazidine ; Cardiac function ; Inflammatory factors ; Endothelial function ; Coronary artery disease ; Medicine ; R
Subject code	610
Language	English
Publishing date	2016-07-01T00:00:00Z
Publisher	Editorial Board of Journal of Hainan Medical University
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Forest Age Mapping Using Landsat Time-Series Stacks Data Based on Forest Disturbance and Empirical Relationships between Age and Height

Lei Tian / Longtao Liao / Yu Tao / Xiaocan Wu / Mingyang Li

Remote Sensing, Vol 15, Iss 2862, p

2023 Volume 2862

Abstract: Forest age is a critical parameter for the status and potential of carbon sequestration in forest ecosystems and reflects major forest disturbance information. However, reliable forest age data with high spatial resolution are lacking to date. In this ... ...

Abstract	Forest age is a critical parameter for the status and potential of carbon sequestration in forest ecosystems and reflects major forest disturbance information. However, reliable forest age data with high spatial resolution are lacking to date. In this study, we proposed a forest age mapping method with a 30 m resolution that considers forest disturbance. Here, we used the Landsat time-series stacks (LTSS) data from 1986 to 2021 and implemented the LandTrendr algorithm on the Google Earth Engine (GEE) platform to detect the age of disturbed forests. The age of non-disturbed forests was extracted based on forest canopy height data and the empirical relationship between age and height. High-resolution Google images combined with the forest management archive data of forestry departments and national forest inventory (NFI) data were used for the validation of disturbed and non-disturbed forest age, respectively. The results showed that the LandTrendr algorithm detected disturbance years with producer and user accuracies of approximately 94% and 95%, respectively; and the age of non-disturbed forests obtained using the empirical age–height relationship showed an R 2 of 0.8875 and a root mean squared error (RMSE) value of 5.776 with NFI-based results. This confirms the reliability of the proposed 30 m resolution forest age mapping method considering forest disturbance. Overall, the method can be used to produce spatially explicit forest age data with high resolution, which can contribute to the sustainable use of forest resources and enhance the understanding of carbon budget studies in forest ecosystems.
Keywords	forest age ; LandTrendr ; forest disturbance ; age and height relationship ; Landsat time-series stacks ; Science ; Q
Subject code	333
Language	English
Publishing date	2023-05-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Cost-effectiveness analysis of sodium zirconium cyclosilicate for treating hyperkalemia among Chinese patients

Lei Tian / Shihui Fu / Mengyuan Li / Xinrui Zhao / Hongchao Li

Frontiers in Public Health, Vol

2023 Volume 11

Abstract: ObjectivesHyperkalemia most commonly develops in chronic kidney disease (CKD) or heart failure (HF) patients. Sodium zirconium cyclosilicate (SZC) is a new selective potassium (K+) binder for treating hyperkalemia. The aim of this study was to evaluate ... ...

Abstract	ObjectivesHyperkalemia most commonly develops in chronic kidney disease (CKD) or heart failure (HF) patients. Sodium zirconium cyclosilicate (SZC) is a new selective potassium (K+) binder for treating hyperkalemia. The aim of this study was to evaluate the cost-effectiveness of SZC vs. usual care for the treatment of hyperkalemia among CKD patients or HF patients in China.MethodsIndividual patient microsimulation models were constructed to simulate a CKD cohort until the initiation of renal replacement therapy (RRT) and a HF cohort across the lifetime horizon. K+ levels were based on two phase 3 clinical trials. Health state utility and event incidence rates were retrieved from literature. Drug costs and healthcare utilization costs were obtained from negotiated price, literature, and expert interviews. Costs and quality-adjusted life-years (QALYs) were both discounted at 5%. The main outcomes were overall costs, QALYs, and incremental cost-effectiveness ratio (ICER). The willingness-to-pay (WTP) threshold in China is CNY 80,976-242,928/QALY, which is one to three times the gross domestic product per capita. Sensitivity analyses were performed to characterize the models’ uncertainty.ResultsIn the HF cohort, the base case results revealed that SZC was associated with 2.86 QALYs and the total cost was CNY 92671.58; usual care was associated with 1.81 QALYs and CNY 54101.26. In the CKD cohort, SZC was associated with 3.23 QALYs and CNY 121416.82 total cost; usual care was associated with 2.91 QALYs and CNY 111464.57. SZC resulted in an ICER of CNY 36735.87/QALY for the HF cohort and CNY 31181.55/QALY for the CKD cohort, respectively. The one-way and probability sensitivity analyses found that the results were robust.ConclusionSZC is a cost-effective treatment compared to usual care in HF and CKD patients. SZC is an important novel treatment option for managing patients with hyperkalemia in China.
Keywords	hyperkalemia ; sodium zirconium cyclosilicate ; chronic kidney disease ; heart failure ; China ; cost-effectiveness ; Public aspects of medicine ; RA1-1270
Subject code	616 ; 610
Language	English
Publishing date	2023-12-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Estimation and Spatio-Temporal Change Analysis of NPP in Subtropical Forests

Tao Li / Mingyang Li / Fang Ren / Lei Tian

Remote Sensing, Vol 14, Iss 2541, p

A Case Study of Shaoguan, Guangdong, China

2022 Volume 2541

Abstract: Exploring the spatial and temporal dynamic characteristics of regional forest net primary productivity (NPP) in the context of global climate change can not only provide a theoretical basis for terrestrial carbon cycle studies, but also provide data ... ...

Abstract	Exploring the spatial and temporal dynamic characteristics of regional forest net primary productivity (NPP) in the context of global climate change can not only provide a theoretical basis for terrestrial carbon cycle studies, but also provide data support for medium- and long-term sustainable management planning of regional forests. In this study, we took Shaoguan City, Guangdong Province, China as the study area, and used Landsat images and National Forest Continuous Inventory (NFCI) data in the corresponding years as the main data sources. Random forest (RF), multiple linear regression (MLR), and BP neural network were the three models applied to estimate forest NPP in the study area. Theil–Sen estimation, Mann–Kendall trend analysis and the standard deviation ellipse (SDE) were chosen to analyze the spatial and temporal dynamic characteristics of NPP, whereas structural equation modeling (SEM) was used to analyze the driving factors of NPP changes. The results show that the performance of the RF model is better than the MLR and BP neural network models. The NPP in the study area showed an increasing trend, as the NPP was 5.66 t·hm −2 ·a −1 , 7.68 t·hm −2 ·a −1 , 8.17 t·hm −2 ·a −1 , 8.25 t·hm −2 ·a −1 , and 10.52 t·hm −2 ·a −1 in 1997, 2002, 2007, 2012, and 2017, respectively. Spatial aggregation of NPP was increased in the period of 1997–2017, and the center shifted from the mid-west to the southwest. In addition, the forest stand factors had the greatest effect on NPP in the study area. The forest stand factors and environmental factors had a positive effect on NPP, and understory factors had a negative effect. Overall, although forest NPP has fluctuated due to the changes of forestry policies and human activities, forest NPP in Shaoguan has been increasing. In the future, the growth potential of NPP in Shaoguan City can be further increased by continuously expanding the area proportion of mixed forests and rationalizing the forest age group structure.
Keywords	net primary productivity ; remote sensing inversion ; dynamic change ; driving factors ; Shaoguan City ; Science ; Q
Subject code	333
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: Bi-Temporal Analysis of Spatial Changes of Boreal Forest Cover and Species in Siberia for the Years 1985 and 2015

Lei Tian / Wenxue Fu

Remote Sensing, Vol 12, Iss 4116, p

2020 Volume 4116

Abstract: Boreal forest is a sensitive indicator of the influence of climate change. It can quantify the level and spatial divergence of forest change for forest resources and carbon cycle research. This study selected a typical boreal forest affected by few human ...

Abstract	Boreal forest is a sensitive indicator of the influence of climate change. It can quantify the level and spatial divergence of forest change for forest resources and carbon cycle research. This study selected a typical boreal forest affected by few human activities as a research area, in Siberia, with a latitude span of 51°N–69°N. A total of 150 Landsat images of this area acquired in 1985 and 2015 were collected. A hierarchical classification approach was first established to retrieve the information of forest cover and species. The forested and nonforested lands were discriminated by the decision tree method and, furthermore, the forested land was classified to broad-leaved and coniferous forests by a random forest algorithm. The overall accuracy was 90.37%, which indicates the validity of the approach. Finally, the quantitative information of the forest cover and species changes in each latitude zone of every 2° was analyzed. The results show that the overall boreal forest cover increased by 5.11% over the past three decades, with broad-leaved forest increasing by 3.54% and coniferous forest increasing by 1.57%. In addition, boreal forest increased in every latitude zone, and the spatial divergence of the changes of the boreal forest cover and species in different latitude zones were significant. Finally, broad-leaved forest increased more rapidly than coniferous forest, and the greatest increase, of up to 5.77%, occurred in the zone of 55°N–57°N.
Keywords	boreal forest ; forest cover and species ; Siberia ; Landsat ; spatial divergence ; Science ; Q
Language	English
Publishing date	2020-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Application of fully conjugated covalent organic frameworks in photocatalytic carbon dioxide reduction performance.

Lei, Tian / Mi, Yongsheng / Wei, Zihao / Li, Shenghua / Pang, Siping

Dalton transactions (Cambridge, England : 2003)

2023 Volume 52, Issue 6, Page(s) 1761–1767

Abstract: Photocatalytic reduction of carbon dioxide into useful feedstocks has attracted increasing attention. In this study, a fully conjugated COF material COF-TMT-A with the main structure containing an alkyne group and triazine part was synthesized using ... ...

Abstract	Photocatalytic reduction of carbon dioxide into useful feedstocks has attracted increasing attention. In this study, a fully conjugated COF material COF-TMT-A with the main structure containing an alkyne group and triazine part was synthesized using sp
Language	English
Publishing date	2023-02-07
Publishing country	England
Document type	Journal Article
ZDB-ID	1472887-4
ISSN	1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
ISSN (online)	1477-9234 ; 1364-5447
ISSN	0300-9246 ; 1477-9226
DOI	10.1039/d2dt03743b
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