Urban sustainable development is under influence of social, economic and environmental factors. Xinjiang is in a new cross-domain development stage, and the research on urban sustainable development in Xinjiang wil be...Urban sustainable development is under influence of social, economic and environmental factors. Xinjiang is in a new cross-domain development stage, and the research on urban sustainable development in Xinjiang wil be an important contribu-tion to sustainable development in western China. In this paper, with the district of Urumqi city as the study area, environmental indicators in 2011 economic society were col ected to establish an index system of factors affecting the sustainable de-velopment, and to make analysis and comprehensive evaluation on the influence factors, proposing suggestions and countermeasures of sustainable development in districts or counties in Urumqi County as per quantitative and qualitative analysis methods.展开更多
The behavior of building materials in constructions of civil structures is influenced by the surrounding moisture and it is a crucial for intensively examined field of the construction physics. Most standard building ...The behavior of building materials in constructions of civil structures is influenced by the surrounding moisture and it is a crucial for intensively examined field of the construction physics. Most standard building materials are characterized by a porous structure, which results in the ability to receive water in a liquid as well as gaseous form in the inner pores. The water fills the storage space of pores under certain conditions; it is transported and transferred back to the surroundings. Many technical studies show that the moisture monitoring is prevailingly based on experiments. Previous calculating methods introduced, e.g., by Glaser, which became the basis for the standard calculations in many European countries in the 1960s, are not always sufficient with respect to the demands of the civil structures. The moisture influences thermo-insulating properties of the material. By a change of the thermo insulation properties of the construction also the thermal and diffusion scheme of the construction is changed and its thermal resistance is decreasing. Faults in the thermo-technical projects occur when thermal conductivity coefficient L values for material in a dry state are substituted.The aim of the research is to determine the capillary conductivity coefficient as a characteristic material moisture parameter of the building materials by the means of a non-destructive method using the experimentally assembled apparatus developed at the Department of Civil Engineering, Brno University of Technology. Keywords： Capillary conductivity coefficient, moisture transfer, EMWR （electromagnetic microwave radiation）, diffusion展开更多
The contemporary demands of the forestry exploitation for quantitative and qualitative increase of timber production are directly related with the mechanization of the wood skidding works. In Greece, the suitable mach...The contemporary demands of the forestry exploitation for quantitative and qualitative increase of timber production are directly related with the mechanization of the wood skidding works. In Greece, the suitable machinery for wood skidding are those with low amortization, operation and installation expenses, are flexible, and may also be used for other farming works （since they are not used very often for wood skidding） and cause the smaller damages to the wood, the forest, the soil and the environment in general. In this paper, it studies the environmental impacts in the remaining stand as much as during the pre-skidding as well as during the main wood skidding with tractor in the forest of Arnaia, Prefecture of Halkidiki, in order to draw out useful conclusions for the improvement of the machinery application methods and the protection of the environment.展开更多
The present work ascertains the feasibility of oil residue treatment for stabilizing wind-blown sand dunes. Various combinations of natural collapsible saline from the Jandaq desert of Iran and oil residue from distil...The present work ascertains the feasibility of oil residue treatment for stabilizing wind-blown sand dunes. Various combinations of natural collapsible saline from the Jandaq desert of Iran and oil residue from distillation towers of Iranian refineries were tested in laboratory experiments. Stabilized sands were evaluated in terms of geotechnical properties, permeability, and oil retention characteristics(i.e. bonding mechanisms, leaching and migrating behaviour of oil residue from the stabilized sands). Since the presence of oil residue in soils can pose an environmental threat, the optimum retention capacity of the stabilized sands is of critical concern. Relative to sand that was not augmented with oil residue, specimens made of 7% oil residues had the highest compressive strength, significantly higher cohesion and load bearing capacity, and considerably lower permeability. The effect of distilled water, saline water and municipal sewage on prepared specimens were also evaluated.展开更多
To encourage the environmental responsibility of consumers and manufacturers for forest management,it is necessary to evaluate the environmental influences of forest products.Ecological footprint(EF) is an internation...To encourage the environmental responsibility of consumers and manufacturers for forest management,it is necessary to evaluate the environmental influences of forest products.Ecological footprint(EF) is an internationally recognized indicator for estimating the natural capital consumption and environmental influences of various forest products.In this study,we developed an accounting model for the EF evaluation of wood flooring,which is a tertiary forest product,by the method of transformation.Next,we used that model to evaluate the EF of three types of wood flooring in China according to their production data from 2000 to 2018.We collected the necessary data by visiting typical enterprises in China and referring to the relevant literature.According to our results,the average EFs of solid wood flooring,engineered solid wood flooring and laminate flooring between 2000 to 2018 were 3.13×10^(6),1.05×10^(7) and 5.07×10^(6) gha,respectively.The total EFs of solid wood flooring,engineered solid wood flooring and laminate flooring from 2000 to 2018 were 5.95×10^(7),1.99×10^(8) and 9.64×10^(7 )gha,respectively.The coefficients of variation(CV) of the EFs for these three types of wood flooring were 0.45,0.87 and 0.76,respectively.The average and total EFs of the engineered solid wood flooring were the largest among the three types of wood flooring.The per capita EF and unit EF for the engineered solid wood flooring were also the highest among the three types of wood flooring.The EFs showed an upward trend with irregular fluctuations from 2000 to 2018 for all three types of wood flooring.It is necessary to reduce the EF of the engineered solid wood flooring and use more environmentally friendly products,such as solid wood flooring,for environmental protection.展开更多
文摘Urban sustainable development is under influence of social, economic and environmental factors. Xinjiang is in a new cross-domain development stage, and the research on urban sustainable development in Xinjiang wil be an important contribu-tion to sustainable development in western China. In this paper, with the district of Urumqi city as the study area, environmental indicators in 2011 economic society were col ected to establish an index system of factors affecting the sustainable de-velopment, and to make analysis and comprehensive evaluation on the influence factors, proposing suggestions and countermeasures of sustainable development in districts or counties in Urumqi County as per quantitative and qualitative analysis methods.
文摘The behavior of building materials in constructions of civil structures is influenced by the surrounding moisture and it is a crucial for intensively examined field of the construction physics. Most standard building materials are characterized by a porous structure, which results in the ability to receive water in a liquid as well as gaseous form in the inner pores. The water fills the storage space of pores under certain conditions; it is transported and transferred back to the surroundings. Many technical studies show that the moisture monitoring is prevailingly based on experiments. Previous calculating methods introduced, e.g., by Glaser, which became the basis for the standard calculations in many European countries in the 1960s, are not always sufficient with respect to the demands of the civil structures. The moisture influences thermo-insulating properties of the material. By a change of the thermo insulation properties of the construction also the thermal and diffusion scheme of the construction is changed and its thermal resistance is decreasing. Faults in the thermo-technical projects occur when thermal conductivity coefficient L values for material in a dry state are substituted.The aim of the research is to determine the capillary conductivity coefficient as a characteristic material moisture parameter of the building materials by the means of a non-destructive method using the experimentally assembled apparatus developed at the Department of Civil Engineering, Brno University of Technology. Keywords： Capillary conductivity coefficient, moisture transfer, EMWR （electromagnetic microwave radiation）, diffusion
文摘The contemporary demands of the forestry exploitation for quantitative and qualitative increase of timber production are directly related with the mechanization of the wood skidding works. In Greece, the suitable machinery for wood skidding are those with low amortization, operation and installation expenses, are flexible, and may also be used for other farming works （since they are not used very often for wood skidding） and cause the smaller damages to the wood, the forest, the soil and the environment in general. In this paper, it studies the environmental impacts in the remaining stand as much as during the pre-skidding as well as during the main wood skidding with tractor in the forest of Arnaia, Prefecture of Halkidiki, in order to draw out useful conclusions for the improvement of the machinery application methods and the protection of the environment.
文摘The present work ascertains the feasibility of oil residue treatment for stabilizing wind-blown sand dunes. Various combinations of natural collapsible saline from the Jandaq desert of Iran and oil residue from distillation towers of Iranian refineries were tested in laboratory experiments. Stabilized sands were evaluated in terms of geotechnical properties, permeability, and oil retention characteristics(i.e. bonding mechanisms, leaching and migrating behaviour of oil residue from the stabilized sands). Since the presence of oil residue in soils can pose an environmental threat, the optimum retention capacity of the stabilized sands is of critical concern. Relative to sand that was not augmented with oil residue, specimens made of 7% oil residues had the highest compressive strength, significantly higher cohesion and load bearing capacity, and considerably lower permeability. The effect of distilled water, saline water and municipal sewage on prepared specimens were also evaluated.
基金The Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFYBB2019MB002)The Project of the State Forestry Administration of the People’s Republic of China (2015-R04)。
文摘To encourage the environmental responsibility of consumers and manufacturers for forest management,it is necessary to evaluate the environmental influences of forest products.Ecological footprint(EF) is an internationally recognized indicator for estimating the natural capital consumption and environmental influences of various forest products.In this study,we developed an accounting model for the EF evaluation of wood flooring,which is a tertiary forest product,by the method of transformation.Next,we used that model to evaluate the EF of three types of wood flooring in China according to their production data from 2000 to 2018.We collected the necessary data by visiting typical enterprises in China and referring to the relevant literature.According to our results,the average EFs of solid wood flooring,engineered solid wood flooring and laminate flooring between 2000 to 2018 were 3.13×10^(6),1.05×10^(7) and 5.07×10^(6) gha,respectively.The total EFs of solid wood flooring,engineered solid wood flooring and laminate flooring from 2000 to 2018 were 5.95×10^(7),1.99×10^(8) and 9.64×10^(7 )gha,respectively.The coefficients of variation(CV) of the EFs for these three types of wood flooring were 0.45,0.87 and 0.76,respectively.The average and total EFs of the engineered solid wood flooring were the largest among the three types of wood flooring.The per capita EF and unit EF for the engineered solid wood flooring were also the highest among the three types of wood flooring.The EFs showed an upward trend with irregular fluctuations from 2000 to 2018 for all three types of wood flooring.It is necessary to reduce the EF of the engineered solid wood flooring and use more environmentally friendly products,such as solid wood flooring,for environmental protection.
