English
norskBlar i forfatter Artikler, rapporter og annet (teknologi og sikkerhet) "Lu, Jinmei"
Viser treff 21-36 av 36
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Multivariate analysis of Co, Fe and Ni leaching from tailings following simulated temperature change
(Journal article; Peer reviewed, 2018)A series of column leaching experiments were performed to understand the leaching behavior of Co, Fe and Ni in Ballangen mine tailings. Multivariate statistical approaches to evaluate potential risk variations in leachate quality and identifies temperature effects on their leaching behavior. Results from column leaching test indicated that the mobility of showed higher temperature may encourage ... -
Non-contact sensing and modelling on the voltage and electric field for powered transmission line
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)From environmental, ecological or technical perspectives, the measurement of the potential voltage, electric field near the power transmission line is essential to ensure the exposure level does not exceed the limits of the government specified. This paper develops a potential voltage model, designs experiments to verify the developed model and to evaluate the parameters in the model. An electric ... -
Prediction of the long-term performance of green liquor dregs as a sealing layer to prevent the formation of acid mine drainage
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-08)One of the mining industry's main concerns is the management of waste rock and tailings generated by sulfide ore extraction. Upon exposure of atmospheric oxygen, iron sulfides oxidize generating acidity. Infiltrating water form a metal-rich acidic leachate called acid mine drainage (AMD), that can cause serious environmental problems. Green liquor dregs (GLD) is a material that resists the passage ... -
Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-01)The effects of watershed subdivisions on hydrological simulations have not been evaluated in Arctic conditions yet. This study applied the Soil and Water Assessment Tool and the threshold drainage area (TDA) technique to evaluate the impacts of watershed subdivision on hydrological simulations at a 5,913-km<sup>2 </sup>Arctic watershed, Målselv. The watershed was discretized according to four TDA ... -
Reliability Assessment of Computer in Design Phase Under High Censored Setting
(Chapter; Bokkapittel, 2023-02-01)Assessment of reliability of personal computer is a challenge for the developer as the lack of sufficient data. Ordinary statistical approach depending on large dataset has less convincible result for the developer to make decision. Prior to massive production, the computer manufacturer runs a life test by picking up a certain number of new computers to run to failure to enlarge the data set. ... -
Reliability modelling on two-dimensional life data using bivariate weibull distribution: with case study of truck in mines
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017)An engineering system can exhibit two- or multi-dimensions in its lifetime. As the classical univariate distribution cannot model this multi-dimensional characteristic, it is necessary to extend it to multivariate distribution in order to capture the multi-dimensional characteristics. This paper proposes a bivariate Weibull distribution that combines two classical Weibull models by a common exponent. ... -
A Review of Hydrological Models Applied in the Permafrost-Dominated Arctic Region
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-06)The Arctic region is the most sensitive region to climate change. Hydrological models are fundamental tools for climate change impact assessment. However, due to the extreme weather conditions, specific hydrological process, and data acquisition challenges in the Arctic, it is crucial to select suitable hydrological model(s) for this region. In this paper, a comprehensive review and comparison of ... -
Seasonal and Spatial Variability of Atmospheric Emissions from Shipping along the Northern Sea Route
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-25)Large seasonal and spatial variabilities in Arctic shipping and its associated emissions are expected in the future, due to continuous sea ice decline. This study collected ship traffic data and the associated emissions of carbon dioxide (CO2), nitrogen oxides (NOx), sulfur dioxide (SO2), particulate matter (PM), and black carbon (BC) along the Northern Sea Route (NSR) in 2013. The aim is to analyze ... -
Sensitivity analysis of the SWAT model to spatial distribution of precipitation in streamflow simulation in an Arctic watershed
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-04)This study approached a physically based, semi-distributed SWAT model to test the model sensitivity to the spatial distribution of precipitation. Ten scenarios of precipitation from five scattered rain gauges in an Arctic watershed Målselv in northern Norway were used as inputs to run the SWAT model. Streamflows were simulated. The model runs at monthly time interval based on the historical data of ... -
An Slow Motion Detection Algorithm using High Order Statistic Approach
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-16)Motion detection is vital for consumer electronics and the Internet of things (IOT). For a scenario where the motion is slow and gentle, the resolution of the motion sensor is critical for the detection, while the algorithm development is another critical issue to differentiate the motion signal from noise measurement. This paper investigates the feasibility of using higher order statistics ... -
Spatiotemporal patterns of particulate matter (PM) and associations between PM and mortality in Shenzhen, China
(Peer reviewed; Journal article; Tidsskriftsartikkel, 2016-03-02)Background: Most studies on air pollution exposure and its associations with human health in China have focused on the heavily polluted industrial areas and/or mega-cities, and studies on cities with comparatively low air pollutant concentrations are still rare. Only a few studies have attempted to analyse particulate matter (PM) for the vibrant economic centre Shenzhen in the Pearl River Delta. ... -
A study of the socioeconomic factors influencing migration in Russia
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-19)Russia has experienced population decline in years and the economic development in Russia is largely restricted by labor shortage, particularly for the Far North and East region. In order to explore the migration mechanisms, six socioeconomic factors were selected to explore the influences on the net migration. Data from the 82 regions covering four time periods (2000, 2005, 2010 and 2015) was ... -
Study on enzymatic activities and behaviors of heavy metal in sediment–plant at muddy tidal flat in Yangtze Estuary
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014-09-02) -
Study on the effect of temperature on the leaching of contaminants from Ballangen Tailings Deposit, Norway-A statistical method
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019)Temperature is one important factor that affects the leaching of contaminants from tailings deposit. However, randomness issue due to the precision of the instrument, the variation of ambient temperature, the individual skill of the lab technician etc., is inevitable and will affect the results when we evaluate the dependence of two parameters. In this study, a statistical method was developed to ... -
Temperature-driven variation in the removal of heavy metals from contaminated tailings leaching in northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-31)High amounts of tailings with a low recycling rate are generated during mining and smelting processes, and a lot of environmental problems were caused by heavy metal leaching from tailings. Temperature is a key point in heavy metals leaching, and knowing the effects of temperature on tailings leaching is useful for tailings management. A small-scale batch leaching experiment was conducted at different ... -
Vanadium removal from mining ditch water using commercial iron products and ferric groundwater treatment residual-based materials
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-06)Removal of vanadium from liquid waste streams protects the environment from toxic vanadium species and promotes the recovery of the valuable metal. In this study, real mining ditch water was sampled from a closed vanadium mine (V–Fe–Ti oxide deposit, Finland) and used in sorption experiments at prevailing vanadium concentration (4.66–6.85 mg/L) and pH conditions (7.02–7.83). The high concentration ...
