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Trends of environmental accidents and impact factors in China

Pengli XUE, Weihua ZENG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 266-276 doi: 10.1007/s11783-010-0267-1

Abstract: An overview of the spatial and temporal variations of the environmental accidents in China in recentFurthermore, some key factors that affect the spatial and temporal tendencies of environmental accidents

Keywords： environmental accidents     spatial and temporal trends     environmental risk    

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Industrial eco-efficiency and its spatial-temporal differentiation in China

Wei YANG, Fengjun JIN, Chengjin WANG, Chen LV

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4,   Pages 559-568 doi: 10.1007/s11783-012-0400-4

Abstract: The aim of this paper is to study the spatial-temporal differentiation of industrial eco-efficiency inUsing methods based on the data envelopment analysis (DEA) model and exploratory spatial data analysis(ESDA) and data from 1985, 1995, 2005, and 2008 of 30 provinces in China, the spatial-temporal patternindustrial eco-efficiency are dominated by clustering of relatively low efficiency provinces; second, spatialunits are concentrated in eastern China, and the lower level spatial units are mainly in western and

Keywords： industrial eco-efficiency     data envelopment analysis (DEA) model     exploratory spatial data analysis (ESDA    

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Spatial and Temporal Distribution of PM

Xiao-hong Chen,Xiang-bo Tang

Frontiers of Engineering Management 2016, Volume 3, Issue 2,   Pages 171-181 doi: 10.15302/J-FEM-2016017

Abstract: Utilizing the initial hourly monitoring data of PM concentrations at 23 monitoring sites across the Chang-Zhu-Tan city cluster between January 2013 and February 2014 that released in Real-time Air Quality Reporting System in Hunan Province, this paper draws diagrams and analyzes the change rule of the pollutants concentration over time. In addition, this paper studies the regional distribution of PM seasonal pollution in the vicinity of the monitoring sites using ArcGIS geographic information system with the Kriging interpolation method. On this basis, this paper puts forward some effective control strategies to cope with regional PM pollution combined with the information of industry distribution and development status in the Chang-Zhu-Tan city cluster.

Keywords： PM2.5     spatial and temporal distribution     ArcGIS     the chang-Zhu-Tan city cluster    

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Assessment of temporal and spatial variations in water quality using multivariate statistical methods

Xue LI,Pengjing LI,Dong WANG,Yuqiu WANG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 895-904 doi: 10.1007/s11783-014-0736-z

Abstract: This study evaluated the temporal and spatial variations of water quality data sets for the Xin'anjiangDA identified three significant parameters (temperature, pH and ) to distinguish temporal groups withtemperature, electricity conductivity, total nitrogen, chemical oxygen demand and total phosphorus) for spatial

Keywords： Xin'anjiang River     multivariable statistical analysis     temporal variation     spatial variation     water quality    

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A Spatial–Temporal Network Perspective for the Propagation Dynamics of Air Traffic Delays Article

Qing Cai, Sameer Alam, Vu N. Duong

Engineering 2021, Volume 7, Issue 4,   Pages 452-464 doi: 10.1016/j.eng.2020.05.027

Abstract: Specifically, we model air traffic scenarios using spatial-temporal networks with airports as the nodesBased on the constructed spatial–temporal networks, we suggest three metrics—magnitude, severity

Keywords： Air traffic     Transport systems     Delay propagation dynamics     Spatial–temporal networks    

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Temporal and spatial stability of the EM/PM molecular subtypes in adult diffuse glioma

Frontiers of Medicine 2023, Volume 17, Issue 2,   Pages 240-262 doi: 10.1007/s11684-022-0936-z

Abstract: samples from the same glioma, single-cell RNA-seq samples, and clinical samples, we here demonstrate the temporaland spatial stability of the EM and PM subtypes.

Keywords： glioma progression     molecular classification     EM/PM subtyping     intratumor heterogeneity    

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Allocation of grassland, livestock and arable based on the spatial and temporal analysis for food demand

Huilong LIN, Ruichao LI, Yifan LIU, Jingrong ZHANG, Jizhou REN

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 1,   Pages 69-80 doi: 10.15302/J-FASE-2017140

Abstract: To explore the distribution of food demand and the projected trend in future food demand in China, this paper analyzed the change in current (1998–2012) per-capita demand for grain, grain-consuming and herbivorous livestock products, and predicted the food demand in 2020. The results indicated that in 1998–2012, the national per-capita consumption of grain ration declined by about 36.66%, and the per-capita consumption of grain-consu-ming and herbivorous livestock products increased by about 48% and 34.09%, respectively. The grain-consu-ming livestock products have become the primary source of both calories and protein for consumers. The proportion of herbivorous livestock products in consumer diets has increased steadily and there has been huge potential in substituting beef and mutton for pork in this dynamic market. The demand for food in different provinces of China is highly variable, which is important for planning grassland agriculture development and ensuring food safety. The demand for grain, and grain-consuming and herbivorous livestock products will increase by about 3.3%, 20% and 14% respectively by 2020. Based on the food demand and trend in the development of grassland agriculture, the 31 provinces in China are divided into three priority groups for grassland agriculture development.

Keywords： arable land equivalent unit (ALEU)     food equivalent unit (FEU)     food security     grassland agriculture     time trend prediction    

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High resolution satellite imaging sensors for precision agriculture

Chenghai YANG

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4,   Pages 393-405 doi: 10.15302/J-FASE-2018226

Abstract: since the 1970s, but they have limited use for precision agriculture because of their relatively coarse spatialRecent developments in high resolution satellite sensors have significantly narrowed the gap in spatialThese imaging sensors not only provide images with high spatial resolution, but can also repeatedly view

Keywords： high resolution satellite sensor     multispectral imagery     precision agriculture     spatial resolution     temporal    

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A Precision-Positioning Method for a High-Acceleration Low-Load Mechanism Based on Optimal Spatial andTemporal Distribution of Inertial Energy Article

Xin Chen,Youdun Bai,Zhijun Yang,Jian Gao,Gongfa Chen

Engineering 2015, Volume 1, Issue 3,   Pages 391-398 doi: 10.15302/J-ENG-2015063

Abstract: velocity-planning method for the precision positioning of a high-acceleration mechanism based on optimal spatialand temporal distribution of inertial energy.optimization using equivalent static loads method (ESLM), and then we selected the modified ESLM for optimal spatial

Keywords： high-acceleration low-load mechanism     precision positioning     spatial and temporal distribution     inertial    

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Current status and developing trends of the contents of heavy metals in sewage sludges in China

Jun YANG,Mei LEI,Tongbin CHEN,Ding GAO,Guodi ZHENG,Guanghui GUO,Duujong LEE

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 719-728 doi: 10.1007/s11783-013-0600-6

Abstract: Hong Kong, Macao and Taiwan by Xinjiang Production and Construction Corps in 2006, and identified the temporaltrends of heavy metal contents in sewage sludge by comparison with surveys conducted in 1994–2001.

Keywords： sewage sludge     heavy metals     temporal variation     national survey     environmental policies    

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A Temporal–Spatial Atlas of Peripheral Nerve Evoked Cortex Potential in Rat: A Novel Testbed to Explore Article

Xiaofeng Yin, Jiuxu Deng, Bo Chen, Bo Jin, Xinyi Gu, Zhidan Qi, Kunpeng Leng, Baoguo Jiang

Engineering 2022, Volume 14, Issue 7,   Pages 147-155 doi: 10.1016/j.eng.2021.04.018

Abstract: Reproducible exciting temporal–spatial progress in the rat brain is obtained and visualized forresults suggest that the brain's response to peripheral stimulation has precise and reproducible temporal–spatial properties.

Keywords： Peripheral nerve     Brain     Evoked cortex potential     Temporal–spatial     Atlas    

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Using hydrochemical signatures to characterize the long-period evolution of groundwater information in the Dagu River Basin, China

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-021-1393-7

Abstract:

• The long-period groundwater evolution was identified by hydrochemical signatures.

Keywords： Groundwater quality     Hydrochemical signatures     Spatial-temporal variations     Water-rock interactions    

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Research on the Strategy for Improving Cultivated Land Quality in China

Hongqi Zhang, Minghong Tan, Xiangbin Kong, Yongmei Xu, Erqi Xu, Erping Shang

Strategic Study of CAE 2018, Volume 20, Issue 5,   Pages 16-22 doi: 10.15302/J-SSCAE-2018.05.003

Abstract:

Based on a systematic analysis of changes in quantity and quality of cultivated land in China, this paper put forward an overall strategic thinking of realizing three strategic transformations in the cultivated land management from the aspects of quantity, quality, and ecology of the cultivated land. Five important measures, including enhancing the cultivated land quantity in China, curbing undisciplined growth of construction land, improving the fertility of cultivated soil, preventing and controlling heavy metal pollution of soil, and preventing and controlling agricultural film pollution, were proposed. It was also recommended that four major projects, namely middle- and low-yield farmland reforms, comprehensive improvement of rural land, comprehensive reparation of heavy metal pollution of soil, and soil and water conservation, sand prevention, and saline soil improvement, should be implemented as soon as possible.

Keywords： cultivated land quality     temporal and spatial change     strategy     major projects    

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Changes in hourly precipitation may explain the sharp reduction of discharge in the middle reach of the Yellow River after 2000

Lin LUO, Zhongjing WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 5,   Pages 756-768 doi: 10.1007/s11783-013-0563-7

Abstract: High temporal resolution precipitation (timescales between 1 and 4 h) data from the June to SeptemberThe Mann-Kendall trend test was applied to detect the presence and significance of monotonic trends,

Keywords： precipitation intensity     Mann-Kendall rank statistic     spatial and temporal distribution     climatic change    

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Spatial and Temporal Variations in the Atmospheric Age Distribution of Primary and Secondary Inorganic Article

Xiaodong Xie, Qi Ying, Hongliang Zhang, Jianlin Hu,

Engineering 2023, Volume 28, Issue 9,   Pages 117-129 doi: 10.1016/j.eng.2022.03.013

Abstract:

The aging timescale of particles is a key parameter in determining their impacts on air quality, human health, and climate. In this study, a one-year simulation of the age distributions of the primary and secondary inorganic fine particulate matter (PM2.5) components was conducted over China using an age-resolved Community Multiscale Air Quality (CMAQ) model. The results indicate that primary PM2.5 (PPM) and ammonium mainly originate from fresh local emissions, with approximately 60%–80% concentrated in 0–24 h age bins in most of China throughout the year. The average age is 15–25 h in most regions in summer, but increases to 40–50 h in southern region of China and the Sichuan Basin (SCB) in winter. Sulfate is more aged than PPM, indicating an enhanced contribution from regional transport. Aged sulfate with atmospheric age > 48 h account for 30%–50% of total sulfate in most regions and seasons, and the concentrations in the > 96 h age bin can reach up to 15 µg·m−3 in SCB during winter. Dramatic seasonal variations occur in the Yangtze River Delta, Pearl River Delta, and SCB, with highest average age of 60–70 h in winter and lowest of 40–45 h in summer. The average age of nitrate is 20–30 h in summer and increases to 40–50 h in winter. The enhanced deposition rate of nitric acid vapor combined with the faster chemical reaction rate of nitrogen oxides leads to a lower atmospheric age in summer. Additionally, on pollution days, the contributions of old age bins (> 24 h) increase notably for both PPM and secondary inorganic aerosols in most cities and seasons, suggesting that regional transport plays a vital role during haze events. The age information of PM2.5, provided by the age-resolved CMAQ model, can help policymakers design effective emergent emission control measures to eliminate severe haze episodes.

Keywords： Atmospheric age     PM2.5     CMAQ model     Control strategy    

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Title Author Date Type Operation

Trends of environmental accidents and impact factors in China

Pengli XUE, Weihua ZENG

Journal Article

Industrial eco-efficiency and its spatial-temporal differentiation in China

Wei YANG, Fengjun JIN, Chengjin WANG, Chen LV

Journal Article

Spatial and Temporal Distribution of PM

Xiao-hong Chen,Xiang-bo Tang

Journal Article

Assessment of temporal and spatial variations in water quality using multivariate statistical methods

Xue LI,Pengjing LI,Dong WANG,Yuqiu WANG

Journal Article

A Spatial–Temporal Network Perspective for the Propagation Dynamics of Air Traffic Delays

Qing Cai, Sameer Alam, Vu N. Duong

Journal Article

Temporal and spatial stability of the EM/PM molecular subtypes in adult diffuse glioma

Journal Article

Allocation of grassland, livestock and arable based on the spatial and temporal analysis for food demand

Huilong LIN, Ruichao LI, Yifan LIU, Jingrong ZHANG, Jizhou REN

Journal Article

High resolution satellite imaging sensors for precision agriculture

Chenghai YANG

Journal Article

A Precision-Positioning Method for a High-Acceleration Low-Load Mechanism Based on Optimal Spatial andTemporal Distribution of Inertial Energy

Xin Chen,Youdun Bai,Zhijun Yang,Jian Gao,Gongfa Chen

Journal Article

Current status and developing trends of the contents of heavy metals in sewage sludges in China

Jun YANG,Mei LEI,Tongbin CHEN,Ding GAO,Guodi ZHENG,Guanghui GUO,Duujong LEE

Journal Article

A Temporal–Spatial Atlas of Peripheral Nerve Evoked Cortex Potential in Rat: A Novel Testbed to Explore

Xiaofeng Yin, Jiuxu Deng, Bo Chen, Bo Jin, Xinyi Gu, Zhidan Qi, Kunpeng Leng, Baoguo Jiang

Journal Article

Using hydrochemical signatures to characterize the long-period evolution of groundwater information in the Dagu River Basin, China

Journal Article

Research on the Strategy for Improving Cultivated Land Quality in China

Hongqi Zhang, Minghong Tan, Xiangbin Kong, Yongmei Xu, Erqi Xu, Erping Shang

Journal Article

Changes in hourly precipitation may explain the sharp reduction of discharge in the middle reach of the Yellow River after 2000

Lin LUO, Zhongjing WANG

Journal Article

Spatial and Temporal Variations in the Atmospheric Age Distribution of Primary and Secondary Inorganic

Xiaodong Xie, Qi Ying, Hongliang Zhang, Jianlin Hu,

Journal Article