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The impact of drought on forest spring phenology in northern China
Published 2025-01-01“…This study focuses on four hydroclimatic regions across northern China, providing a comprehensive assessment of regional variations in SOS dynamics. …”
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Prevalence of Corneal Astigmatism in Patients before Cataract Surgery in Northern China
Published 2014-01-01“…To analyze the prevalence and presentation patterns of corneal astigmatism in cataract surgery candidates in a teaching hospital in northern China. Methods. From May 1, 2012, to April 30, 2013, partial coherence interferometry (IOLMaster) measurements of all qualified cataract surgery candidates were retrospectively collected and analyzed. …”
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WRF-Chem simulations of snow nitrate and other physicochemical properties in northern China
Published 2025-02-01“…., WRF-Chem (Weather Research and Forecasting Model coupled with Chemistry), and evaluated the performance of WRF-Chem in simulating snow cover; snow depth; and BC, dust, and nitrate concentrations with field observations in northern China, which is one of the regions with a dense and prolonged snow cover. …”
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Impact of the COVID-19 Event on the Characteristics of Atmospheric Single Particle in the Northern China
Published 2024-12-01“…To investigate the impact of the COVID-19 pandemic prevention and control actions on the chemical composition, size distribution, and mixing state of individual particles, real-time individual particles in the urban atmosphere of the Northern China were analyzed using single particle aerosol mass spectrometry (SPAMS) during January 16 to February 4, 2020. …”
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Emergency volunteering willingness and participation: a cross-sectional survey of residents in northern China
Published 2018-07-01“…Objectives This study aimed to identify factors that influence people’s willingness to volunteer and participation in emergency volunteering in northern China.Design/Setting This study was conducted in Heilongjiang province in September and October 2014 using a mixed methods approach, which included a cross-sectional questionnaire survey on community residents and in–depth interviews with community residents and relevant organisational managers and officials in relation to emergency responses. …”
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Trends in Moisture Index, Farmland Area, and Their Combined Effects on Grain Production in Northern China
Published 2014-01-01“…To analyze the effects of land use and climate change on grain production, the area of farmland in northern China during 1988–2008 was determined from remote sensing images, a moisture index (MI) was calculated from daily meteorological data obtained from weather stations, and unit grain production was obtained from statistical yearbooks. …”
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Molecular Epidemiology of Carbapenem-Resistant Klebsiella pneumoniae in a Tertiary Hospital in Northern China
Published 2022-01-01“…The present study aimed to explore the epidemiological characteristics of CRKP isolates in Northern China and to elucidate their drug resistance mechanisms. …”
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Numerical and Experimental Study on Energy Performance of Photovoltaic-Heat Pipe Solar Collector in Northern China
Published 2015-01-01“…Water type PV/thermal (PV/T) system was a good choice but it could become freezing in cold areas of Northern China. This paper proposed a simple combination of common-used PV panel and heat pipe, called PV-heat pipe (PV-HP) solar collector, for both electrical and thermal energy generation. …”
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Distributions, Sources, and Backward Trajectories of Atmospheric Polycyclic Aromatic Hydrocarbons at Lake Small Baiyangdian, Northern China
Published 2012-01-01“…Air samples were collected seasonally at Lake Small Baiyangdian, a shallow lake in northern China, between October 2007 and September 2008. …”
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Spatial patterns and driving forces of sand-binding shrubs in sand-blown and sand hazard regions of northern China
Published 2025-01-01“…This study investigates four species of sand-binding shrubs in the fixed sand dunes of northern China’s sand-blown regions: Artemisia ordosica (AO), Caragana korshinskii (CK), Ceratoides latens (CL), and Oxytropis aciphylla (OA). …”
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Molecular Epidemiology and Genetic Evolution of Porcine Reproductive and Respiratory Syndrome Virus in Northern China During 2021–2023
Published 2025-01-01Subjects: Get full text
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Clinical Characteristics and Outcomes in Patients with Ruptured Middle Cerebral Artery Aneurysms: A Multicenter Study in Northern China
Published 2024-11-01“…Abstract Introduction The long-term prognosis of ruptured middle cerebral artery aneurysms (MCAAs) in northern China remains unclear. The aim of this study is to analyze the epidemiological characteristics and long-term outcomes of ruptured MCAAs in northern China. …”
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Emission Characteristics of Volatile Organic Compounds from Typical Coal Utilization Sources: A Case Study in Shanxi of Northern China
Published 2021-05-01“…In this study, we investigated the profiles; benzene, toluene, ethylbenzene, and xylene (BTEX) ratios; ozone formation potential (OFP); and secondary organic aerosol (SOA) formation potential of VOCs generated by coal-utilizing steel plants, power plants, coking plants, and residential stoves in northern China. Among the detected VOCs, the results identified 1-butene as the most abundant species for both the power plants (36.7%) and the residential stoves (41.7%) as well as a significant contributor at the steel plants (7.3%), and alkenes, alkanes, and aromatics composed the largest groups for the power plants (42.0%) and residential stoves (60.2%); steel plants (59.2%); and coking plants (66.1%), respectively. …”
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Effects of Groundwater Depth and Salt Content on Vegetation in Dry Lake Basins: A Case Study of Chahan Lake, Northern China
Published 2022-01-01“…In this study, a typical modern dry lake in northern China, Chahan Lake, was taken as the study area. …”
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Spatiotemporal heterogeneity of ecosystem service interactions and their determining thresholds across distinct climate zones in the temperate desert steppe of northern China
Published 2025-01-01“…We selected the temperate desert steppe in northern China, which is the transition zone from a semi-arid to arid climate. …”
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The activities of Soviet intelligence service among Russian emigration in post-war Northern China (according to the memoirs of N. A. Martynov)
Published 2023-05-01Subjects: Get full text
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Tracing Aquatic Macrophyte Development in Nansi Lake, Northern China's Largest Freshwater Lake: Plant Macrofossils From 1855 to Present
Published 2025-01-01“…This study utilized plant macrofossil remains deposited in the sediment, combined with macrophyte surveys from 1983 to 2010, to reconstruct the historical changes in the macrophyte community over approximately 160 years in Lake Weishan, a sub‐lake of Lake Nansi located in the lower Yellow River (Huanghe River) Basin, northern China. Approximately 54.3% of the species historically recorded at the core site were identified through macro‐remains analysis, including five previously unrecorded submerged taxa (Myriophyllum verticillatum, Ranunculus trichophyllus, Chara sp., Nitella sp., and Vallisneria spinulosa) discovered during monitoring surveys. …”
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