LIVIVO - Search results -

Search results

Result 1 - 10 of total 20

Search options

Article ; Online: High-Performance All-Small-Molecule Organic Solar Cells Fabricated via Halogen-Free Preparation Process.

Du, Bo / Ma, Mengyuan / Zhang, Panpan / Wu, Shangrong / Bin, Haijun / Li, Yongfang

ACS applied materials & interfaces

2024 Volume 16, Issue 2, Page(s) 2564–2572

Abstract: Small-molecule organic photovoltaic materials attract more attention attributing to their precisely defined structure, ease of synthesis, and reduced batch-to-batch variations. The majority of all-small-molecule organic solar cells (ASM-OSCs) have ... ...

Abstract	Small-molecule organic photovoltaic materials attract more attention attributing to their precisely defined structure, ease of synthesis, and reduced batch-to-batch variations. The majority of all-small-molecule organic solar cells (ASM-OSCs) have traditionally relied on halogenated solvents for dissolving photovoltaic materials as well as used for the additives or solvent vapor annealing. However, these halogen-based processes pose risks to the environment and human health, potentially impeding future commercial production. Herein, we conducted an investigation into the impact of various nonhalogen solvents on the performance of the devices. By selecting the high boiling point solvent toluene, we achieved a desirable phase separation and stable morphology characterized by fibrous crystals within the blend film. Consequently, the power conversion efficiencies of 14.4 and 11.7% were obtained from H31:Y6-based small-area (0.04 cm
Language	English
Publishing date	2024-01-02
Publishing country	United States
Document type	Journal Article
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.3c14992
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Is switching intravesical chemotherapeutic agents beneficial in short-term recurrent high-risk non-muscle-invasive bladder tumors? A 5-year retrospective study.

Chen, Shuaiqi / Sun, Guangyu / Chen, Xiaoxu / Salgado, Tiyara / Wu, Shangrong / Hu, Hailong / Liu, Ranlu / Qie, Yunkai

BMC urology

2024 Volume 24, Issue 1, Page(s) 25

Abstract: Objective: To explore if switching intravesical chemotherapeutic agents is beneficial in short-term recurrences of high-risk non-muscle-invasive bladder cancer (NMIBC) following the failure of preceding intravesical therapy.: Materials and methods: ... ...

Abstract	Objective: To explore if switching intravesical chemotherapeutic agents is beneficial in short-term recurrences of high-risk non-muscle-invasive bladder cancer (NMIBC) following the failure of preceding intravesical therapy. Materials and methods: From June 2010 to October 2015, 205 patients with NMIBC who experienced tumor recurrence within a year after receiving first-line intravesical chemotherapy (IVC) were classified into two groups. After a second complete transurethral resection (TUR) process, we immediately altered the intravesical instillation agent for 107 patients (group A). In contrast, the remaining 98 patients (group B) continued using their original intravesical instillation agent. After transurethral resection of the bladder tumor (TURBT), all patients received either an immediate instillation of epirubicin (EPI), gemcitabine (GEM), or hydroxycamptothecin (HCPT), followed by regular induction and maintenance instillations. Recurrence and progression rates were evaluated using the Chi-square test, and recurrence-free survival (RFS) and progression-free survival (PFS) were calculated using the Kaplan-Meier method. Results: In this study, there was no significant difference in either the 5-year tumor recurrence or progression rates between the two groups (p > 0.05) The Kaplan-Meier plot showed no difference in progression-free or recurrence-free survival between the two groups. Conclusion: Switching IVC agents does not improve RFS and PFS for patients with short-term recurrent high-risk NMIBC.
MeSH term(s)	Humans ; Administration, Intravesical ; Neoplasm Invasiveness ; Neoplasm Recurrence, Local/drug therapy ; Neoplasm Recurrence, Local/pathology ; Non-Muscle Invasive Bladder Neoplasms/drug therapy ; Non-Muscle Invasive Bladder Neoplasms/surgery ; Retrospective Studies ; Urinary Bladder/pathology ; Urinary Bladder Neoplasms/drug therapy ; Urinary Bladder Neoplasms/surgery ; Transurethral Resection of Bladder ; Epirubicin/therapeutic use ; Gemcitabine/therapeutic use ; Camptothecin/therapeutic use ; Antineoplastic Agents/therapeutic use
Chemical Substances	Epirubicin (3Z8479ZZ5X) ; Gemcitabine ; Camptothecin (XT3Z54Z28A) ; hydroxycamptothecinum ; Antineoplastic Agents
Language	English
Publishing date	2024-01-31
Publishing country	England
Document type	Journal Article
ZDB-ID	2059857-9
ISSN	1471-2490 ; 1471-2490
ISSN (online)	1471-2490
ISSN	1471-2490
DOI	10.1186/s12894-024-01410-1
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Secretion of IL-6 and IL-8 in the senescence of bone marrow mesenchymal stem cells is regulated by autophagy via FoxO3a.

Zheng, Yong / Wu, Shangrong / Ke, Haiqiang / Peng, Shanshan / Hu, Chengjun

Experimental gerontology

2022 Volume 172, Page(s) 112062

Abstract: Bone marrow mesenchymal stem cells (BMSCs) are widely used for therapeutic applications in tissue engineering and regenerative medicine. Nevertheless, the function of BMSCs is adversely affected by senescence. Thus, understanding the molecular mechanisms ...

Abstract	Bone marrow mesenchymal stem cells (BMSCs) are widely used for therapeutic applications in tissue engineering and regenerative medicine. Nevertheless, the function of BMSCs is adversely affected by senescence. Thus, understanding the molecular mechanisms that contribute to BMSC senescence is critical for the development of BMSC-based tissue engineering and regenerative medicine. In this study, senescent BMSCs were characterized with >80 % of BMSCs stained positive for SA-β-gal, increased expressions of senescence-related genes (p16
MeSH term(s)	Autophagy/physiology ; Bone Marrow Cells/metabolism ; Cellular Senescence/physiology ; Interleukin-6/metabolism ; Interleukin-8 ; Mesenchymal Stem Cells/physiology ; Forkhead Transcription Factors
Chemical Substances	Interleukin-6 ; Interleukin-8 ; Forkhead Transcription Factors
Language	English
Publishing date	2022-12-14
Publishing country	England
Document type	Journal Article
ZDB-ID	390992-x
ISSN	1873-6815 ; 0531-5565
ISSN (online)	1873-6815
ISSN	0531-5565
DOI	10.1016/j.exger.2022.112062
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 579: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: Estimating the winter wheat harvest index with canopy hyperspectral remote sensing data based on the dynamic fraction of post-anthesis phase biomass accumulation

Zhang, Ningdan / Liu, Xingren / Ren, Jianqiang / Wu, Shangrong / Li, Fangjie

International journal of remote sensing. 2022 Mar. 19, v. 43, no. 6

2022

Abstract: Remote sensing-based crop harvest index (HI) information is of great significance for crop yield estimation, crop variety breeding and evaluation of crop cultivation effectiveness. The method for estimating HI using f G (fraction of post-anthesis phase ... ...

Abstract	Remote sensing-based crop harvest index (HI) information is of great significance for crop yield estimation, crop variety breeding and evaluation of crop cultivation effectiveness. The method for estimating HI using f G (fraction of post-anthesis phase biomass accumulation) has been widely used and shows good performance at the field scale, but the upscaled regional application of this method had not been achieved using remote sensing information. In this paper, a remote sensing method for estimating the dynamic harvest index (D-HI) based on the remote sensing-based dynamic f G (D-f G) was proposed to solve this problem and was verified based on D-f G and D-HI measurements. This approach was based on accurate D-f G parameters estimated by using the NDSI constructed from hyperspectral sensitive band centres. The results showed that the D-f G estimation, the overall verification accuracy of the D-HI estimation at different growth stages and the accuracy of the D-HI estimation in a single growth stage were highly accurate. In the overall D-HI estimation verification, the normalized root square mean error (NRMSE) was between 10.83% and 14.45%, and the mean relative error (MRE) was between 9.62% and 13.99%. At maturity, the D-HI estimation accuracy based on band centre λ (732 nm, 834 nm) was the highest, and the NRMSE and MRE were 9.62% and 9.27%, respectively. Based on these results, the proposed method is feasible and effective at accurately estimating the D-HI, thus providing a technical reference for the use of satellite remote sensing data to obtain regional crop HI information based on f G.
Keywords	biomass production ; canopy ; cultivars ; developmental stages ; harvest index ; satellites ; winter wheat
Language	English
Dates of publication	2022-0319
Size	p. 2029-2058.
Publishing place	Taylor & Francis
Document type	Article
ZDB-ID	1497529-4
ISSN	1366-5901 ; 0143-1161
ISSN (online)	1366-5901
ISSN	0143-1161
DOI	10.1080/01431161.2022.2054297
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article ; Online: Analysis of risk factors for Gleason score upgrading after radical prostatectomy in a Chinese cohort.

Zhang, Baoling / Wu, Shangrong / Zhang, Yang / Guo, Mingyu / Liu, Ranlu

Cancer medicine

2021 Volume 10, Issue 21, Page(s) 7772–7780

Abstract: Background: To study the risk factors of Gleason score upgrading (GSU) after radical prostatectomy (RP) in a Chinese cohort.: Methods: The data of 637 patients who underwent prostate biopsy and RP in our hospital from January 2014 to January 2021 ... ...

Abstract	Background: To study the risk factors of Gleason score upgrading (GSU) after radical prostatectomy (RP) in a Chinese cohort. Methods: The data of 637 patients who underwent prostate biopsy and RP in our hospital from January 2014 to January 2021 were retrospectively analyzed. The age, body mass index (BMI), prostate-specific antigen (PSA) level, testosterone (TT) level, neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), eosinophil-to-lymphocyte ratio (ELR), aspartate aminotransferase/alanine transaminase (AST/ALT) ratio, clinical stage, the biopsy method, and pathological characteristics of specimens after biopsy and RP were collected for all patients. Univariate analysis and multivariate logistic regression analysis were used to analyze the risk factors of GSU after RP. The predictive efficacy was verified with the area under the curve (AUC) of the receiver operating characteristic (ROC) curve. We performed the analysis separately in the overall cohort and in the cohort with Gleason score (GS) = 6. Results: In the overall cohort, 177 patients (27.79%) had GSU, and in the GS = 6 cohort, 68 patients (60.18%) had GSU. Multivariate logistic regression analysis showed that in the overall cohort, clinical stage ≥T2c (OR = 3.201, p < 0.001), the number of positive cores ≥3 (OR = 0.435, p = 0.04), and positive rate of biopsy (OR = 0.990, p = 0.016) can affect whether GS is upgraded, and the AUC of the combination of the three indicators for predicting the occurrence of GSU was 0.627. In the GS = 6 cohort, multivariate logistic regression analysis showed that clinical stage ≥T2c (OR = 4.690, p = 0.001) was a risk factor for GSU, and the AUC predicted to occur GSU is 0.675. Conclusion: Clinical stage ≥T2c, the number of positive cores <3, and lower positive rate of biopsy are the risk factors of GSU. This study may provide some references for clinicians to judge the accuracy of biopsy pathological grading and formulate treatment strategies, but the specific effect still needs clinical practice certification.
MeSH term(s)	Aged ; Alanine Transaminase/blood ; Asians ; Biopsy ; Blood Cell Count ; Body Mass Index ; China ; Humans ; Kallikreins/blood ; Male ; Neoplasm Grading ; Neoplasm Staging ; Prostate-Specific Antigen/blood ; Prostatectomy ; Prostatic Neoplasms/blood ; Prostatic Neoplasms/ethnology ; Prostatic Neoplasms/pathology ; Prostatic Neoplasms/surgery ; Retrospective Studies ; Risk Factors ; Testosterone/blood ; Transaminases/blood
Chemical Substances	Testosterone (3XMK78S47O) ; Transaminases (EC 2.6.1.-) ; Alanine Transaminase (EC 2.6.1.2) ; KLK3 protein, human (EC 3.4.21.-) ; Kallikreins (EC 3.4.21.-) ; Prostate-Specific Antigen (EC 3.4.21.77)
Language	English
Publishing date	2021-09-16
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2659751-2
ISSN	2045-7634 ; 2045-7634
ISSN (online)	2045-7634
ISSN	2045-7634
DOI	10.1002/cam4.4274
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Comprehensive analysis of predictive factors for upstaging in intraprostatic cancer after radical prostatectomy: Different patterns of spread exist in lesions at different locations.

Wu, Shangrong / Jiang, Yuchen / Liang, Zhengxin / Chen, Shuaiqi / Sun, Guangyu / Ma, Shenfei / Chen, Kaifei / Liu, Ranlu

Cancer medicine

2023 Volume 12, Issue 17, Page(s) 17776–17787

Abstract: Background: Accurate assessment of the clinical staging is crucial for determining the need for radical prostatectomy (RP) in prostate cancer (PCa). However, the current methods for PCa staging may yield incorrect results. This study aimed to ... ...

Abstract	Background: Accurate assessment of the clinical staging is crucial for determining the need for radical prostatectomy (RP) in prostate cancer (PCa). However, the current methods for PCa staging may yield incorrect results. This study aimed to comprehensively analyze independent predictors of postoperative upstaging of intraprostatic cancer. Methods: We conducted a retrospective analysis of data from intraprostatic cancer patients who underwent radical surgery between March 2019 and December 2022. Intraprostatic cancer was defined as a lesion confined to the prostate, excluding cases where multiparameter magnetic resonance imaging (mpMRI) showed the lesion in contact with the prostatic capsule. We assessed independent predictors of extraprostatic extension (EPE) and analyzed their association with positive surgical margin (PSM) status. In addition, based on the distance of the lesion from the capsule on mpMRI, we divided the patients into non-transition zone and transition zone groups for further analysis. Results: A total of 500 patients were included in our study. Logistic regression analysis revealed that biopsy Gleason grade group (GG) (odds ratio, OR: 1.370, 95% confidence interval, CI: 1.093-1.718) and perineural invasion (PNI) (OR: 2.746, 95% CI: 1.420-5.309) were predictive factors for postoperative EPE. Both biopsy GG and PNI were associated with lateral (GG: OR: 1.270, 95% CI: 1.074-1.501; PNI: OR: 2.733, 95% CI: 1.521-4.911) and basal (GG: OR: 1.491, 95% CI: 1.194-1.862; PNI: OR: 3.730, 95% CI: 1.929-7.214) PSM but not with apex PSM (GG: OR: 1.176, 95% CI: 0.989-1.399; PNI: OR: 1.204, 95% CI: 0.609-2.381) after RP. Finally, PNI was an independent predictor of EPE in the transition zone (OR: 11.235, 95% CI: 2.779-45.428) but not in the non-transition zone (OR: 1.942, 95% CI: 0.920-4.098). Conclusion: PNI and higher GG may indicate upstaging of tumors in patients with intraprostatic carcinoma. These two factors are associated with PSM in locations other than the apex of the prostate. Importantly, cancer in the transition zone of the prostate is more likely to spread externally through nerve invasion than cancer in the non-transition zone.
MeSH term(s)	Male ; Humans ; Prostate/surgery ; Prostate/pathology ; Retrospective Studies ; Prostatic Neoplasms/surgery ; Prostatic Neoplasms/pathology ; Prostatectomy/methods ; Biopsy ; Margins of Excision
Language	English
Publishing date	2023-08-03
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2659751-2
ISSN	2045-7634 ; 2045-7634
ISSN (online)	2045-7634
ISSN	2045-7634
DOI	10.1002/cam4.6401
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: MicroRNA-367-3p directly targets RAB23 and inhibits proliferation, migration and invasion of bladder cancer cells and increases cisplatin sensitivity.

Wei, Xifeng / Jiang, Yuchen / Yang, Guanghua / Chang, Taihao / Sun, Guangyu / Chen, Shuaiqi / Wu, Shangrong / Liu, Ranlu

Journal of cancer research and clinical oncology

2023 Volume 149, Issue 20, Page(s) 17807–17821

Abstract: Objectives: This study investigated the biological role of miR-367-3p upregulation in bladder cancer and verified the mutual relation between miR-367-3p and RAB23.: Materials and methods: Expression levels of miR-367-3p were determined by RT-qPCR in ... ...

Abstract	Objectives: This study investigated the biological role of miR-367-3p upregulation in bladder cancer and verified the mutual relation between miR-367-3p and RAB23. Materials and methods: Expression levels of miR-367-3p were determined by RT-qPCR in bladder cancer cell lines and human bladder cancer tissues. The effects of miR-367-3p on proliferation, migration and invasion were evaluated by cell colony formation assays, wound healing assays and trans-well assays, respectively. The effects of miR-367-3p and RAB23 on cisplatin sensitivity of bladder cancer cells were assessed by CCK-8 assay. The expression of its target-RAB23 was determined by western blotting in T24, 5637. Plasmids used in dual-luciferase assays were constructed to confirm the action of miR-367-3p on downstream target-RAB23 in T24 cells. And also, the role of miR-367-3p in tumorigenesis was also confirmed in nude mouse models. Results: The downregulation of miR-367-3p was observed in human bladder cancer tissues. MiR-367-3p downregulation positively correlated with tumor stage and tumor grade. MiR-367-3p overexpression in T24, 5637 cells suppressed the proliferation, migration, and invasion of bladder cancer cells in vitro while decreasing IC50 values under T24 and 5637 cisplatin treatment conditions. RAB23 was shown to be upregulated in bladder cancer tissues and cell lines. MiR-367-3p directly bound to the 3' UTR of RAB23 in T24 cells. RAB23 was potentially accounted for the aforementioned functions of miR-367-3p. Tumor formation experiments in nude mouse models confirmed that overexpression of miR-367-3p could inhibit tumor growth and invasion in vivo. Conclusions: miR-367-3p acts as a tumor suppressor in bladder cancer by downregulating RAB23 signaling. We conjecture that miR-367-3p-mediated downregulation of RAB23 expression may be a new therapeutic strategy for bladder cancer treatment.
MeSH term(s)	Animals ; Mice ; Humans ; Cisplatin/pharmacology ; Mice, Nude ; Cell Line, Tumor ; Cell Movement ; Cell Proliferation ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Urinary Bladder Neoplasms/drug therapy ; Urinary Bladder Neoplasms/genetics ; Urinary Bladder Neoplasms/metabolism ; 3' Untranslated Regions ; Gene Expression Regulation, Neoplastic ; rab GTP-Binding Proteins/genetics ; rab GTP-Binding Proteins/metabolism
Chemical Substances	Cisplatin (Q20Q21Q62J) ; MicroRNAs ; 3' Untranslated Regions ; RAB23 protein, human (EC 3.6.1.-) ; rab GTP-Binding Proteins (EC 3.6.5.2) ; MIRN367 microRNA, human ; MIRN367 microRNA, mouse
Language	English
Publishing date	2023-11-08
Publishing country	Germany
Document type	Journal Article
ZDB-ID	134792-5
ISSN	1432-1335 ; 0171-5216 ; 0084-5353 ; 0943-9382
ISSN (online)	1432-1335
ISSN	0171-5216 ; 0084-5353 ; 0943-9382
DOI	10.1007/s00432-023-05484-6
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Uh III Zs.10: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾

Article ; Online: Development and validation of a nomogram for predicting osteoporosis in prostate cancer patients: A cross-sectional study from China.

Wu, Shangrong / Ma, Xudong / Liang, Zhengxin / Jiang, Yuchen / Chen, Shuaiqi / Sun, Guangyu / Chen, Kaifei / Liu, Ranlu

The Prostate

2023 Volume 83, Issue 16, Page(s) 1537–1548

Abstract: Background: The specific risk factors contributing to the development of osteoporosis and the appropriate timing of treatment in Chinese prostate cancer (PCa) patients remain unclear. Our objective was to develop and validate a nomogram capable of ... ...

Abstract	Background: The specific risk factors contributing to the development of osteoporosis and the appropriate timing of treatment in Chinese prostate cancer (PCa) patients remain unclear. Our objective was to develop and validate a nomogram capable of predicting the occurrence of osteoporosis in PCa patients. Methods: We conducted a cross-sectional study with PCa patients attending the Second Hospital of Tianjin Medical University, collecting data from June 2021 to February 2023. The patients were divided into training and validation sets in a 7:3 ratio. The LASSO regression was used to identify the most relevant predictive variables, and the multivariable logistic regression was used to construct the nomogram. The nomogram's performance was validated through receiver operating characteristic (ROC) curves, C-index, calibration curves, and decision curve analysis (DCA) in both the training and validation sets. Results: We collected data from a total of 596 patients and then constructed the nomogram using age, body mass index, hemoglobin, vitamin D3, testosterone, and androgen deprivation therapy duration. The C-index of the nomogram was 0.923 in the training set and 0.859 in the validation set. The nomogram showed good consistency in both sets. DCA demonstrated the clinical benefit of the nomogram across various prediction thresholds. Furthermore, a separate nomogram was constructed to predict bone loss in patients undergoing ADT, exhibiting equally favorable diagnostic performance and clinical benefit. Conclusion: This study constructed two reliable nomograms to predict osteoporosis and bone loss, integrating personal health information and PCa-specific treatment data. These nomograms offer an easy and individualized approach to predict the occurrence of osteoporosis and bone loss in PCa patients.
MeSH term(s)	Male ; Humans ; Prostatic Neoplasms/diagnosis ; Prostatic Neoplasms/epidemiology ; Cross-Sectional Studies ; Nomograms ; Androgen Antagonists ; Osteoporosis/diagnosis ; Osteoporosis/epidemiology ; China/epidemiology
Chemical Substances	Androgen Antagonists
Language	English
Publishing date	2023-08-17
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	604707-5
ISSN	1097-0045 ; 0270-4137
ISSN (online)	1097-0045
ISSN	0270-4137
DOI	10.1002/pros.24612
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1608: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: Comparison of Regional Winter Wheat Mapping Results from Different Similarity Measurement Indicators of NDVI Time Series and Their Optimized Thresholds

Li, Fangjie / Ren, Jianqiang / Wu, Shangrong / Zhao, Hongwei / Zhang, Ningdan

Remote Sensing. 2021 Mar. 18, v. 13, no. 6

2021

Abstract: Generally, there is an inconsistency between the total regional crop area that was obtained from remote sensing technology and the official statistical data on crop areas. When performing scale conversion and data aggregation of remote sensing-based crop ...

Abstract	Generally, there is an inconsistency between the total regional crop area that was obtained from remote sensing technology and the official statistical data on crop areas. When performing scale conversion and data aggregation of remote sensing-based crop mapping results from different administrative scales, it is difficult to obtain accurate crop planting area that match crop area statistics well at the corresponding administrative level. This problem affects the application of remote sensing-based crop mapping results. In order to solve the above problem, taking Fucheng County of Hebei Province in the Huanghuaihai Plain of China as the study area, based on the Sentinel-2 normalized difference vegetation index (NDVI) time series data covering the whole winter wheat growth period, the statistical data of the regional winter wheat planting area were regarded as reference for the winter wheat planting area extracted by remote sensing, and a new method for winter wheat mapping that is based on similarity measurement indicators and their threshold optimizations (WWM-SMITO) was proposed with the support of the shuffled complex evolution-University of Arizona (SCE-UA) global optimization algorithm. The accuracy of the regional winter wheat mapping results was verified, and accuracy comparisons with different similarity indicators were carried out. The results showed that the total area accuracy of the winter wheat area extraction by the proposed method reached over 99.99%, which achieved a consistency that was between the regional remote sensing-based winter wheat planting area and the statistical data on the winter wheat planting area. The crop recognition accuracy also reached a high level, which showed that the proposed method was effective and feasible. Moreover, in the accuracy comparison of crop mapping results based on six different similarity indicators, the winter wheat distribution that was extracted by root mean square error (RMSE) had the best recognition accuracy, and the overall accuracy and kappa coefficient were 94.5% and 0.8894, respectively. The overall accuracies of winter wheat that were extracted by similarity indicators, such as Euclidean distance (ED), Manhattan distance (MD), spectral angle mapping (SAM), and spectral correlation coefficient (SCC) were 94.1%, 93.9%, 93.3%, and 92.8%, respectively, and the kappa coefficients were 0.8815, 0.8776, 0.8657, and 0.8558, respectively. The accuracy of the winter wheat results extracted by the similarity indicator of dynamic time warping (DTW) was relatively low. The results of this paper could provide guidance and serve as a reference for the selection of similarity indicators in crop distribution extraction and for obtaining large-scale, long-term, and high-precision remote sensing-based information on a regional crop spatial distribution that is highly consistent with statistical crop area data.
Keywords	algorithms ; statistics ; time series analysis ; winter wheat ; Arizona ; China
Language	English
Dates of publication	2021-0318
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2513863-7
ISSN	2072-4292
ISSN	2072-4292
DOI	10.3390/rs13061162
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article: Regional winter wheat yield estimation based on the WOFOST model and a novel VW-4DEnSRF assimilation algorithm

Wu, Shangrong / Yang, Peng / Ren, Jianqiang / Chen, Zhongxin / Li, He

Remote sensing of environment. 2021 Mar. 15, v. 255

2021

Abstract: To further improve the accuracy of regional crop yield estimation based on data assimilation, a novel EnSRF assimilation algorithm based on a variable time window and four-dimensional extension (VW-4DEnSRF) was proposed. In this research, taking Hengshui ...

Abstract	To further improve the accuracy of regional crop yield estimation based on data assimilation, a novel EnSRF assimilation algorithm based on a variable time window and four-dimensional extension (VW-4DEnSRF) was proposed. In this research, taking Hengshui City of Hebei Province as the study area and winter wheat as the research crop, based on the WOFOST crop model and the proposed VW-4DEnSRF algorithm, a crop yield assimilation system was successfully constructed after parameter sensitivity analysis and parameter calibration of the crop model. Supported by the field-measured crop yield data and based on the effective validation of the yield assimilation system at a single point scale and in a typical experimental area, the scale optimization of grid size for regional yield estimation was effectively selected. Finally, combining the WOFOST model and inverted remotely sensed LAI, the regional winter wheat yield simulation under the optimal grid size of 500 m was carried out effectively through comparison with the field-measured yield data and official statistical yield data at the county level. Among them, the R², adjusted R² and RMSE between the simulated yield and ground-measured yield were 0.481, 0.471 and 801.4 kg.ha⁻¹, respectively. The mean value of the estimated yield of winter wheat in Hengshui City was 6787 kg.ha⁻¹, and the RMSE and RE between the estimated yield and official yield were 416.7 kg.ha⁻¹ and 4.56%, respectively. These above results showed that the crop yield assimilation system based on the WOFOST model and proposed VW-4DEnSRF algorithm had good performances at both the single-point level and regional level, which proved that the proposed algorithm was feasible and effective at simulating crop yield over a large area
Keywords	algorithms ; crop models ; environment ; winter wheat ; China
Language	English
Dates of publication	2021-0315
Publishing place	Elsevier Inc.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	431483-9
ISSN	0034-4257
ISSN	0034-4257
DOI	10.1016/j.rse.2020.112276
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

984/1289: Show issues
Z 2005/734: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

To top

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED