Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2909099826', 'doi': 'https://doi.org/10.3390/s19020263', 'title': 'Evaluation of Machine Learning Approaches to Predict Soil Organic Matter and pH Using vis-NIR Spectra', 'display_name': 'Evaluation of Machine Learning Approaches to Predict Soil Organic Matter and pH Using vis-NIR Spectra', 'publication_year': 2019, 'publication_date': '2019-01-11', 'ids': {'openalex': 'https://openalex.org/W2909099826', 'doi': 'https://doi.org/10.3390/s19020263', 'mag': '2909099826', 'pmid': 'https://pubmed.ncbi.nlm.nih.gov/30641879', 'pmcid': 'https://www.ncbi.nlm.nih.gov/pmc/articles/6359233'}, 'language': 'en', 'primary_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.3390/s19020263', 'pdf_url': 'https://www.mdpi.com/1424-8220/19/2/263/pdf?version=1547186344', 'source': {'id': 'https://openalex.org/S101949793', 'display_name': 'Sensors', 'issn_l': '1424-8220', 'issn': ['1424-8220'], 'is_oa': True, 'is_in_doaj': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310310987', 'host_organization_name': 'Multidisciplinary Digital Publishing Institute', 'host_organization_lineage': ['https://openalex.org/P4310310987'], 'host_organization_lineage_names': ['Multidisciplinary Digital Publishing Institute'], 'type': 'journal'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'doaj', 'pubmed'], 'open_access': {'is_oa': True, 'oa_status': 'gold', 'oa_url': 'https://www.mdpi.com/1424-8220/19/2/263/pdf?version=1547186344', 'any_repository_has_fulltext': True}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5053963852', 'display_name': 'Meihua Yang', 'orcid': 'https://orcid.org/0000-0002-7315-5826'}, 'institutions': [{'id': 'https://openalex.org/I76130692', 'display_name': 'Zhejiang University', 'ror': 'https://ror.org/00a2xv884', 'country_code': 'CN', 'type': 'education', 'lineage': ['https://openalex.org/I76130692']}, {'id': 'https://openalex.org/I4390039277', 'display_name': 'Yuzhang Normal University', 'ror': 'https://ror.org/03mqkaa34', 'country_code': None, 'type': 'education', 'lineage': ['https://openalex.org/I4390039277']}], 'countries': ['CN'], 'is_corresponding': False, 'raw_author_name': 'Meihua Yang', 'raw_affiliation_strings': ['Department of Environmental Engineering, Yuzhang Normal University, Nanchang 330103, China', 'Institute of Agricultural Remote Sensing and Information Technology Application, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China'], 'affiliations': [{'raw_affiliation_string': 'Institute of Agricultural Remote Sensing and Information Technology Application, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China', 'institution_ids': ['https://openalex.org/I76130692']}, {'raw_affiliation_string': 'Department of Environmental Engineering, Yuzhang Normal University, Nanchang 330103, China', 'institution_ids': ['https://openalex.org/I4390039277']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5101850840', 'display_name': 'Dongyun Xu', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I76130692', 'display_name': 'Zhejiang University', 'ror': 'https://ror.org/00a2xv884', 'country_code': 'CN', 'type': 'education', 'lineage': ['https://openalex.org/I76130692']}], 'countries': ['CN'], 'is_corresponding': False, 'raw_author_name': 'Dongyun Xu', 'raw_affiliation_strings': ['Institute of Agricultural Remote Sensing and Information Technology Application, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China'], 'affiliations': [{'raw_affiliation_string': 'Institute of Agricultural Remote Sensing and Information Technology Application, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China', 'institution_ids': ['https://openalex.org/I76130692']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5080056117', 'display_name': 'Songchao Chen', 'orcid': 'https://orcid.org/0000-0003-1245-0482'}, 'institutions': [], 'countries': ['FR'], 'is_corresponding': False, 'raw_author_name': 'Songchao Chen', 'raw_affiliation_strings': ['The Institute National de la Recherche Agronomique (INRA), Unité InfoSol, 45075 Orléans, France'], 'affiliations': [{'raw_affiliation_string': 'The Institute National de la Recherche Agronomique (INRA), Unité InfoSol, 45075 Orléans, France', 'institution_ids': []}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5100413704', 'display_name': 'Hongyi Li', 'orcid': 'https://orcid.org/0000-0003-2609-5805'}, 'institutions': [{'id': 'https://openalex.org/I59649739', 'display_name': 'Jiangxi University of Finance and Economics', 'ror': 'https://ror.org/03efmyj29', 'country_code': 'CN', 'type': 'education', 'lineage': ['https://openalex.org/I59649739']}], 'countries': ['CN'], 'is_corresponding': False, 'raw_author_name': 'Hongyi Li', 'raw_affiliation_strings': ['Department of Land Resource Management, Jiangxi University of Finance and Economics, Nanchang 330013, China'], 'affiliations': [{'raw_affiliation_string': 'Department of Land Resource Management, Jiangxi University of Finance and Economics, Nanchang 330013, China', 'institution_ids': ['https://openalex.org/I59649739']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5108053049', 'display_name': 'Zhou Shi', 'orcid': 'https://orcid.org/0000-0003-3914-5402'}, 'institutions': [{'id': 'https://openalex.org/I76130692', 'display_name': 'Zhejiang University', 'ror': 'https://ror.org/00a2xv884', 'country_code': 'CN', 'type': 'education', 'lineage': ['https://openalex.org/I76130692']}, {'id': 'https://openalex.org/I4210151987', 'display_name': 'Ministry of Agriculture and Rural Affairs', 'ror': 'https://ror.org/05ckt8b96', 'country_code': 'CN', 'type': 'government', 'lineage': ['https://openalex.org/I4210127390', 'https://openalex.org/I4210151987']}], 'countries': ['CN'], 'is_corresponding': True, 'raw_author_name': 'Zhou Shi', 'raw_affiliation_strings': ['Institute of Agricultural Remote Sensing and Information Technology Application, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China', 'Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture, Hangzhou 310058, China'], 'affiliations': [{'raw_affiliation_string': 'Institute of Agricultural Remote Sensing and Information Technology Application, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China', 'institution_ids': ['https://openalex.org/I76130692']}, {'raw_affiliation_string': 'Key Laboratory of Spectroscopy Sensing, Ministry of Agriculture, Hangzhou 310058, China', 'institution_ids': ['https://openalex.org/I4210151987']}]}], 'institution_assertions': [], 'countries_distinct_count': 2, 'institutions_distinct_count': 4, 'corresponding_author_ids': ['https://openalex.org/A5108053049'], 'corresponding_institution_ids': ['https://openalex.org/I76130692', 'https://openalex.org/I4210151987'], 'apc_list': {'value': 2400, 'currency': 'CHF', 'value_usd': 2598, 'provenance': 'doaj'}, 'apc_paid': {'value': 2400, 'currency': 'CHF', 'value_usd': 2598, 'provenance': 'doaj'}, 'fwci': 6.919, 'has_fulltext': True, 'fulltext_origin': 'pdf', 'cited_by_count': 119, 'citation_normalized_percentile': {'value': 0.999899, 'is_in_top_1_percent': True, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 98, 'max': 99}, 'biblio': {'volume': '19', 'issue': '2', 'first_page': '263', 'last_page': '263'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10770', 'display_name': 'Soil Geostatistics and Mapping', 'score': 0.9973, 'subfield': {'id': 'https://openalex.org/subfields/2305', 'display_name': 'Environmental Engineering'}, 'field': {'id': 'https://openalex.org/fields/23', 'display_name': 'Environmental Science'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, 'topics': [{'id': 'https://openalex.org/T10770', 'display_name': 'Soil Geostatistics and Mapping', 'score': 0.9973, 'subfield': {'id': 'https://openalex.org/subfields/2305', 'display_name': 'Environmental Engineering'}, 'field': {'id': 'https://openalex.org/fields/23', 'display_name': 'Environmental Science'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T10640', 'display_name': 'Spectroscopy and Chemometric Analyses', 'score': 0.9971, 'subfield': {'id': 'https://openalex.org/subfields/1602', 'display_name': 'Analytical Chemistry'}, 'field': {'id': 'https://openalex.org/fields/16', 'display_name': 'Chemistry'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T12157', 'display_name': 'Geochemistry and Geologic Mapping', 'score': 0.9791, 'subfield': {'id': 'https://openalex.org/subfields/1702', 'display_name': 'Artificial Intelligence'}, 'field': {'id': 'https://openalex.org/fields/17', 'display_name': 'Computer Science'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/extreme-learning-machine', 'display_name': 'Extreme Learning Machine', 'score': 0.5815289}], 'concepts': [{'id': 'https://openalex.org/C139945424', 'wikidata': 'https://www.wikidata.org/wiki/Q1940696', 'display_name': 'Mean squared error', 'level': 2, 'score': 0.87096345}, {'id': 'https://openalex.org/C128990827', 'wikidata': 'https://www.wikidata.org/wiki/Q192830', 'display_name': 'Coefficient of determination', 'level': 2, 'score': 0.67846406}, {'id': 'https://openalex.org/C22354355', 'wikidata': 'https://www.wikidata.org/wiki/Q422009', 'display_name': 'Partial least squares regression', 'level': 2, 'score': 0.6355958}, {'id': 'https://openalex.org/C2780150128', 'wikidata': 'https://www.wikidata.org/wiki/Q21948731', 'display_name': 'Extreme learning machine', 'level': 3, 'score': 0.5815289}, {'id': 'https://openalex.org/C12267149', 'wikidata': 'https://www.wikidata.org/wiki/Q282453', 'display_name': 'Support vector machine', 'level': 2, 'score': 0.5733775}, {'id': 'https://openalex.org/C2780092901', 'wikidata': 'https://www.wikidata.org/wiki/Q3433612', 'display_name': 'Correlation coefficient', 'level': 2, 'score': 0.5460468}, {'id': 'https://openalex.org/C182124840', 'wikidata': 'https://www.wikidata.org/wiki/Q1154759', 'display_name': 'Soil organic matter', 'level': 3, 'score': 0.5263644}, {'id': 'https://openalex.org/C33923547', 'wikidata': 'https://www.wikidata.org/wiki/Q395', 'display_name': 'Mathematics', 'level': 0, 'score': 0.423384}, {'id': 'https://openalex.org/C161584116', 'wikidata': 'https://www.wikidata.org/wiki/Q1952580', 'display_name': 'Multivariate statistics', 'level': 2, 'score': 0.42078996}, {'id': 'https://openalex.org/C159390177', 'wikidata': 'https://www.wikidata.org/wiki/Q9161265', 'display_name': 'Soil science', 'level': 1, 'score': 0.4030496}, {'id': 'https://openalex.org/C185592680', 'wikidata': 'https://www.wikidata.org/wiki/Q2329', 'display_name': 'Chemistry', 'level': 0, 'score': 0.32881838}, {'id': 'https://openalex.org/C39432304', 'wikidata': 'https://www.wikidata.org/wiki/Q188847', 'display_name': 'Environmental science', 'level': 0, 'score': 0.31422687}, {'id': 'https://openalex.org/C154945302', 'wikidata': 'https://www.wikidata.org/wiki/Q11660', 'display_name': 'Artificial intelligence', 'level': 1, 'score': 0.30283266}, {'id': 'https://openalex.org/C159750122', 'wikidata': 'https://www.wikidata.org/wiki/Q96621023', 'display_name': 'Soil water', 'level': 2, 'score': 0.3002749}, {'id': 'https://openalex.org/C105795698', 'wikidata': 'https://www.wikidata.org/wiki/Q12483', 'display_name': 'Statistics', 'level': 1, 'score': 0.27692708}, {'id': 'https://openalex.org/C50644808', 'wikidata': 'https://www.wikidata.org/wiki/Q192776', 'display_name': 'Artificial neural network', 'level': 2, 'score': 0.23824489}, {'id': 'https://openalex.org/C41008148', 'wikidata': 'https://www.wikidata.org/wiki/Q21198', 'display_name': 'Computer science', 'level': 0, 'score': 0.120300144}], 'mesh': [], 'locations_count': 7, 'locations': [{'is_oa': True, 'landing_page_url': 'https://doi.org/10.3390/s19020263', 'pdf_url': 'https://www.mdpi.com/1424-8220/19/2/263/pdf?version=1547186344', 'source': {'id': 'https://openalex.org/S101949793', 'display_name': 'Sensors', 'issn_l': '1424-8220', 'issn': ['1424-8220'], 'is_oa': True, 'is_in_doaj': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310310987', 'host_organization_name': 'Multidisciplinary Digital Publishing Institute', 'host_organization_lineage': ['https://openalex.org/P4310310987'], 'host_organization_lineage_names': ['Multidisciplinary Digital Publishing Institute'], 'type': 'journal'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': True, 'landing_page_url': 'https://hal.inrae.fr/hal-02626984', 'pdf_url': 'https://hal.inrae.fr/hal-02626984/document', 'source': {'id': 'https://openalex.org/S4306402512', 'display_name': 'HAL (Le Centre pour la Communication Scientifique Directe)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1294671590', 'host_organization_name': 'Centre National de la Recherche Scientifique', 'host_organization_lineage': ['https://openalex.org/I1294671590'], 'host_organization_lineage_names': ['Centre National de la Recherche Scientifique'], 'type': 'repository'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': False, 'landing_page_url': 'https://doaj.org/article/e30019e02445459a86f1ed6f027fb23c', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306401280', 'display_name': 'DOAJ (DOAJ: Directory of Open Access Journals)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': None, 'host_organization_name': None, 'host_organization_lineage': [], 'host_organization_lineage_names': [], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, {'is_oa': True, 'landing_page_url': 'https://europepmc.org/articles/pmc6359233', 'pdf_url': 'https://europepmc.org/articles/pmc6359233?pdf=render', 'source': {'id': 'https://openalex.org/S4306400806', 'display_name': 'Europe PMC (PubMed Central)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1303153112', 'host_organization_name': 'European Bioinformatics Institute', 'host_organization_lineage': ['https://openalex.org/I1303153112'], 'host_organization_lineage_names': ['European Bioinformatics Institute'], 'type': 'repository'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': True, 'landing_page_url': 'https://hal.inrae.fr/hal-02626984/file/2019_Yang_Sensors_1.pdf', 'pdf_url': 'https://hal.inrae.fr/hal-02626984/file/2019_Yang_Sensors_1.pdf', 'source': {'id': 'https://openalex.org/S4306402512', 'display_name': 'HAL (Le Centre pour la Communication Scientifique Directe)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1294671590', 'host_organization_name': 'Centre National de la Recherche Scientifique', 'host_organization_lineage': ['https://openalex.org/I1294671590'], 'host_organization_lineage_names': ['Centre National de la Recherche Scientifique'], 'type': 'repository'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': True, 'landing_page_url': 'https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6359233', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S2764455111', 'display_name': 'PubMed Central', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': False, 'landing_page_url': 'https://pubmed.ncbi.nlm.nih.gov/30641879', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306525036', 'display_name': 'PubMed', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.3390/s19020263', 'pdf_url': 'https://www.mdpi.com/1424-8220/19/2/263/pdf?version=1547186344', 'source': {'id': 'https://openalex.org/S101949793', 'display_name': 'Sensors', 'issn_l': '1424-8220', 'issn': ['1424-8220'], 'is_oa': True, 'is_in_doaj': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310310987', 'host_organization_name': 'Multidisciplinary Digital Publishing Institute', 'host_organization_lineage': ['https://openalex.org/P4310310987'], 'host_organization_lineage_names': ['Multidisciplinary Digital Publishing Institute'], 'type': 'journal'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [{'id': 'https://metadata.un.org/sdg/15', 'display_name': 'Life on land', 'score': 0.73}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 40, 'referenced_works': ['https://openalex.org/W1496317909', 'https://openalex.org/W1592341820', 'https://openalex.org/W1852865358', 'https://openalex.org/W1934353085', 'https://openalex.org/W1964503221', 'https://openalex.org/W1970361125', 'https://openalex.org/W1973273412', 'https://openalex.org/W1979539465', 'https://openalex.org/W1986530877', 'https://openalex.org/W1991476842', 'https://openalex.org/W1995446821', 'https://openalex.org/W1997287413', 'https://openalex.org/W1999300248', 'https://openalex.org/W2007610539', 'https://openalex.org/W2017422910', 'https://openalex.org/W2018512902', 'https://openalex.org/W2018722542', 'https://openalex.org/W2019038438', 'https://openalex.org/W2025014611', 'https://openalex.org/W2036657109', 'https://openalex.org/W2048016791', 'https://openalex.org/W2054603652', 'https://openalex.org/W2073503722', 'https://openalex.org/W2073858026', 'https://openalex.org/W2084559921', 'https://openalex.org/W2095649738', 'https://openalex.org/W2098290011', 'https://openalex.org/W2111072639', 'https://openalex.org/W2121971770', 'https://openalex.org/W2146738048', 'https://openalex.org/W2164317192', 'https://openalex.org/W2200638541', 'https://openalex.org/W2319587516', 'https://openalex.org/W2323082653', 'https://openalex.org/W2399675776', 'https://openalex.org/W2590486621', 'https://openalex.org/W2612907974', 'https://openalex.org/W2754473040', 'https://openalex.org/W2807694716', 'https://openalex.org/W2888610957'], 'related_works': ['https://openalex.org/W620177578', 'https://openalex.org/W4321793219', 'https://openalex.org/W4310398614', 'https://openalex.org/W3150155395', 'https://openalex.org/W2363756343', 'https://openalex.org/W2360847790', 'https://openalex.org/W2123872763', 'https://openalex.org/W2123691565', 'https://openalex.org/W2084902024', 'https://openalex.org/W1423879547'], 'abstract_inverted_index': {'Soil': [0], 'organic': [1], 'matter': [2], '(SOM)': [3], 'and': [4, 21, 26, 88, 105, 123, 160, 197, 223, 305], 'pH': [5, 27, 161, 177, 224], 'are': [6], 'essential': [7], 'soil': [8, 13, 32, 53, 59, 303], 'fertility': [9], 'indictors': [10], 'of': [11, 24, 115, 125, 173, 221, 273, 299, 301], 'paddy': [12, 64, 302], 'in': [14, 66, 307], 'the': [15, 67, 89, 97, 109, 135, 145, 174, 184, 271, 287, 308], 'middle-lower': [16, 309], 'Yangtze': [17, 68, 310], 'Plain.': [18, 311], 'Rapid,': [19], 'non-destructive': [20], 'accurate': [22], 'determination': [23, 116], 'SOM': [25, 149, 222], 'is': [28, 295], 'vital': [29], 'to': [30, 50, 95, 127, 133, 280, 284], 'preventing': [31], 'degradation': [33], 'caused': [34], 'by': [35, 293], 'inappropriate': [36], 'land': [37], 'management': [38], 'practices.': [39], 'Visible-near': [40], 'infrared': [41], '(vis-NIR)': [42], 'spectroscopy': [43], 'with': [44, 140, 186, 249, 290], 'multivariate': [45], 'calibration': [46], 'can': [47], 'be': [48], 'used': [49, 94, 132, 218], 'effectively': [51], 'estimate': [52], 'properties.': [54], 'In': [55], 'this': [56], 'study,': [57], '523': [58], 'samples': [60], 'were': [61, 131, 217], 'collected': [62], 'from': [63], 'fields': [65], 'Plain,': [69], 'China.': [70], 'Four': [71], 'machine': [72], 'learning': [73, 85], 'approaches-partial': [74], 'least': [75, 79], 'squares': [76], 'regression': [77, 91], '(PLSR),': [78], 'squares-support': [80], 'vector': [81], 'machines': [82, 86], '(LS-SVM),': [83], 'extreme': [84], '(ELM)': [87], 'Cubist': [90], 'model': [92, 147, 185], '(Cubist)-were': [93], 'compare': [96], 'prediction': [98, 136, 178, 220, 298], 'accuracy': [99], 'based': [100], 'on': [101], 'vis-NIR': [102], 'full': [103, 250], 'bands': [104, 106, 143, 227, 251, 292], 'reduced': [107, 142, 226, 277, 291], 'using': [108, 225], 'genetic': [110], 'algorithm': [111], '(GA).': [112], 'The': [113, 138, 171], 'coefficient': [114], '(R²),': [117], 'root': [118], 'mean': [119], 'square': [120], 'error': [121], '(RMSE),': [122], 'ratio': [124], 'performance': [126, 172], 'inter-quartile': [128], 'distance': [129], '(RPIQ)': [130], 'assess': [134], 'accuracy.': [137], 'ELM': [139, 216, 288], 'GA': [141, 187, 199, 294], 'was': [144, 213, 275], 'best': [146], 'for': [148, 176, 219, 297], '(SOM:': [150, 228, 278], 'R²': [151, 229, 239, 262], '=': [152, 155, 158, 163, 166, 169, 189, 192, 195, 201, 204, 207, 230, 233, 236, 240, 243, 246, 253, 256, 259, 263, 266, 269], '0.81,': [153, 231, 254], 'RMSE': [154, 165, 191, 203, 232, 242, 255, 265], '5.17,': [156, 234], 'RPIQ': [157, 168, 194, 206, 235, 245, 258, 268], '2.87)': [159], '(R²': [162, 188, 200, 252], '0.76,': [164, 241, 264], '0.43,': [167, 244], '2.15).': [170], 'LS-SVM': [175], 'did': [179], 'not': [180], 'differ': [181], 'significantly': [182], 'between': [183], '0.75,': [190], '0.44,': [193], '2.08)': [196], 'without': [198], '0.74,': [202], '0.45,': [205, 267], '2.07).': [208], 'Although': [209], 'a': [210], 'slight': [211], 'increase': [212], 'observed': [214], 'when': [215], '2.87;': [237], 'pH:': [238, 261, 282], '2.15)': [247], 'compared': [248], '5.18,': [257], '2.83;': [260], '2.07),': [270], 'number': [272], 'wavelengths': [274], 'greatly': [276], '201': [279, 283], '44;': [281], '32).': [285], 'Thus,': [286], 'coupled': [289], 'recommended': [296], 'properties': [300], '(SOM': [304], 'pH)': [306]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2909099826', 'counts_by_year': [{'year': 2024, 'cited_by_count': 16}, {'year': 2023, 'cited_by_count': 27}, {'year': 2022, 'cited_by_count': 33}, {'year': 2021, 'cited_by_count': 18}, {'year': 2020, 'cited_by_count': 18}, {'year': 2019, 'cited_by_count': 4}], 'updated_date': '2024-12-25T00:08:03.153085', 'created_date': '2019-01-25'}