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Homomorphic signature schemes for single-source and multi-source network coding
Published 2019-11-01“…To solve the problems of pollution attacks of single-source and multi-source network coding,two homomorphic signature schemes for network coding were proposed.In homomorphic signature for single-source network,the message hash value was signed on the elliptic curve,then the message,hash value and the signature of hash value were output,and the receiving node could verify the signature,the elliptic curve signature based on homomorphism could resist intra/inter-generation pollution attacks.Homomorphic signature from pairings for multi-source network coding could resist pollution attacks,and the introduction of timestamp made it be capable to resist replay attacks.In the random oracle model,it proves that two schemes are all secure under the selective attacks.Analysis shows that two schemes can effectively improve the verification efficiency.…”
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1663
Analysis for Spatial Heterogeneity of Water Quality of Rivers in Mingcheng Town
Published 2020-01-01“…To protect and improve the water environment,this paper takes rivers and Gaoming river in Mingcheng Town as research objects,researches the current status of the water environment of 36 monitoring sections,analyzes the spatial variation of six water quality indexes i.e.DO,COD<sub>Mn</sub>,COD,BOD<sub>5</sub>,NH<sub>3</sub>-N and TP by GIS technique and mathematical statistics method,and discusses the influence of land use types on spatial variation of water quality.The results of research show that:the overall water quality of rivers in Mingcheng Town was poor.Water quality indexes showed significantly spatial variation,and the coefficient of variation of NH<sub>3</sub>-N and TP was higher than other water quality indexes.In terms of space,compared with other research units,R7 water quality was poorer.Part of the water quality indexes showed obvious spatial concentration and positive spatial autocorrelation.In wet season,there was a significant correlation between land use types such as vegetation,cultivated land and water area and water quality indexes.The agricultural runoff pollution and aquaculture pollution may be the important factors that affect water quality.In dry season,there was no obvious correlation of land use types with water quality indexes.The poor water quality may be caused by the domestic pollution sources,industrial pollution sources and agricultural non-point sources.…”
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Assessing the COVID-19 Lockdown Impact on Global Air Quality: A Transportation Perspective
Published 2025-01-01“…As an unintended consequence of these responses, significant air pollution reductions have been recorded across the world. …”
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Water quality assessment of Bone River using STORET method
Published 2024-12-01“…BOD and COD parameters contribute the most to the river pollution level. Keywords: Water quality Pollution STORET Bone River…”
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Determination of Particulate Matter Dispersion in Eastern Black Sea Region Using Geographical Information Systems
Published 2016-02-01“…One of these effects is the air pollution. Air pollution reduces the life quality in cities and also it brings about many health problems. …”
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Opportunities for Multimodal Transport Development to Promote a Sustainable Environment
Published 2023-12-01“…Excessive vehicle traffic leads to an increase in environmental pollution, noise and traffic accidents, which have a highly negative impact on society and, more specifically, on human health. …”
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Two-layer homolog network approach for PFAS nontarget screening and retrospective data mining
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Analysis of Long-term Water Quality up to the Standard in Jinchuan River Basin Based on Hydrodynamic and Water Quality Model
Published 2023-01-01“…The water quality of the Jinchuan River Basin cannot reach the standard steadily all year round.Thus,after analyzing the pollution characteristics of the basin,this paper proposes three schemes for water quality that can reach the standard in the long term,considering the improvement in the treatment,water supplement,and sewage interception abilities in sewage treatment plans of this basin.Meanwhile,prediction and analysis are also conducted on the water quality improvement effects of each plan.The results are as follows.In current pollution source conditions,regarding the two schemes where sewage treatment efficiency is increased by 10% and the basin water supplement rises by 50% on this basis,the peak concentration of ammonia nitrogen decreases,whereas the concentration is still higher than the Class V water standard.In the third scheme where the inflow concentration can achieve the assessment objectives of a south sewage treatment plant,the pollution load of pollutants into the river is reduced by about 44.4%.Therefore,the ammonia nitrogen concentration in the river network is significantly decreased,and the ammonia nitrogen concentration in the Baotaqiao section of downstream is reduced to 1.85 mg/L.Its water quality can meet the long-term water quality up to the standard in the whole process.The results can provide an effective scientific basis for water pollution control and prevention in the Jinchuan River Basin.…”
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Assessment of the Management of Plastic Wastes in Bwindi Impenetrable National Park: A Case Study of Buhoma Tourism Sector.
Published 2025“…The measures currently in place have not fully mitigated plastic pollution, and some practices, such as incineration, still pose environmental risks, such as air pollution from emitted fumes. …”
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Dual role of organic matter in Feammox-driven nitrogen and phosphate removal
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Spatio-temporal evolution characteristics and influencing factors of environmental welfare performance in Chinese cities
Published 2025-02-01“…BackgroundIn the process of China’s urbanization, issues such as air pollution, water pollution, soil pollution, and noise pollution have become increasingly prominent, severely constraining the sustainable development of cities. …”
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Long-Term Trends and Ecological Risks of Heavy Metal Accumulation in Cultivated Land of Songnen Plain, China
Published 2025-01-01“…Heavy metal pollution in agricultural soils poses a serious threat to food security. …”
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Review of modified biochar for removing humic acid from water: analysis of structure-activity relationship
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Forecasting PM2.5 in Malaysia Using a Hybrid Model
Published 2023-06-01“…Abstract Predicting future PM2.5 concentrations based on knowledge obtained from past observational data is very useful for predicting air pollution. This paper aims to develop a hybrid forecasting model using an Artificial Neural Network (ANN) and Triple Exponential Smoothing (TES) on clustered PM2.5 data from a HPR (High Pollution Region), MPR (Medium Pollution Region), and LPR (Low Pollution Region) in Malaysia. …”
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ANALYSIS OF AIR QUALITY IN TELEORMAN BY MEANS OF BIOMONITORS-LICHENS
Published 2023-05-01“…Lichens are often used as bioindicators in biomonitoring of heavy metal pollution. These organisms are sensitive to heavy metal pollution and can accumulate significant amounts of metals in their tissues. …”
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Causal Effects of PM2.5, NOx, and NO2 on Cognitive Function: A Two-sample Mendelian Randomization Study
Published 2024-06-01“…Abstract Epidemiological studies have revealed that air pollutants are related to cognitive decline, but a causal relationship has not been established. …”
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Contribution of dust emissions from farmland to particulate matter concentrations in North China Plain: Integration of WRF-Chem and WEPS model
Published 2025-01-01“…The findings revealed that farmland emissions contributed approximately 13% of atmospheric PM10 concentrations during winter months (January and December), underscoring the significant role of agricultural activities in regional air pollution. This study highlights the importance of including farmland wind erosion into chemical transport models to more accurately understand and mitigate the effects of agricultural activities on atmospheric pollution in agricultural regions worldwide.…”
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