Results 21 to 30 of about 979,001 (246)
History of demographic development of the Chinese province of Heilongjiang (1970–2020)
Вестник Самарского университета: История, педагогика, филология, 2023 The article presents the history of the demographic development of one of the Chinese northeastern provinces. Various processes of socio-political, trade, economic, foreign policy and spatial-regional transformations of the PRC in the second half of the ...
S. B. Makeeva
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Agronomy, 2021 Wild soybean germplasm is distributed widely in China, particularly in Heilongjiang Province. In this study, 242 wild soybean accessions from four agricultural divisions in Heilongjiang Province were evaluated based on six qualitative and eight ...
Wei Li +10 more
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Research on Forest Ecological Benefit Compensation System of Heilongjiang in China [PDF]
E3S Web of Conferences, 2020 The forest ecological function zone in Heilongjiang Province is an important barrier for maintaining ecological security in my country. Its forest ecological environment has great influence on the sustainable development of regional economy and society ...
Jiang Fan
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A Comparison of Reform-Era Labor Force Participation Rates of China’s Ethnic Minorities and Han Majority [PDF]
, 2005 Previous research suggests that minorities are not faring well in China’s transition—both income and occupational attainment gaps are widening. We are particularly interested in whether the differences in majority and minority economic outcomes are the ...
Hughes, James W. +2 more
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Agriculture, 2023 As one of the major new agricultural business entities, agricultural leading enterprises (ALEs) are responsible for ensuring national food security, leading agricultural and rural modernization, and increasing farmers’ employment prospects and incomes ...
Tianli Wang, Yanji Ma, Siqi Luo
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Polish Journal of Environmental Studies, 2023 The Mollisol region of Heilongjiang Province is an important commercial grain production base in China. The Mollisol region has the characteristics of high fertility, good structure, loose texture, suitable for farming, and suitable for crop growth ...
Yingjie Dai +5 more
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Agronomy, 2023 Precipitation unevenness significantly influences the rational allocation of water resources and the management of agricultural irrigation. Based on precipitation data from 29 meteorological stations in Heilongjiang Province, China, from 1961 to 2020 ...
Fanxiang Meng +7 more
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Fire, 2023 Large forest fires can cause significant damage to forest ecosystems and threaten human life and property. Heilongjiang Province is a major forested area in China with the highest number and concentration of lightning-caused forest fires in the country ...
Qiangying Jiao +5 more
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Investigation and Research on the Status Quo of Open Access Resources Construction of University Libraries in Heilongjiang Province [PDF]
Nongye tushu qingbao xuebao, 2020 [Purpose/Significance] The aim is to analyze the current situation of open access (OA) resources construction in Heilongjiang university libraries, so as to understand the overall level of OA resources construction in the region, find out the existing ...
ZHANG Meng, ZHAO Zichen, LIU Chunyan
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Forests, 2023 Forest fires are important factors that influence and restrict the development of forest ecosystems. In this paper, forest-fire-risk prediction was studied based on random forest (RF) and backpropagation neural network (BPNN) algorithms.
Chao Gao, Honglei Lin, Hai-qing Hu
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