A New Two-staged Model to Predict Corrosion Degree of Steel Bars in Cracked Concrete Area--《Journal of Wuhan University of Technology(Materials Science Edition)》2014年05期
A New Two-staged Model to Predict Corrosion Degree of Steel Bars in Cracked Concrete Area
【摘要】：In order to quantitatively describe the local corrosion process of steel bars in cracked concrete area, a new two-staged utility model is established, and the effect of transverse cracks on the reinforcement corrosion is analyzed from the angle of long-term service performance evaluation for reinforced concrete structure. Moreover, based on the principle of spectral analysis for environmental action of concrete, an equivalent relationship is established between the corrosion rate in the natural environment and that under the standard temperature and relative humidity condition according to the principle of equivalent annual corrosion depth. Comparison between the inspection results from some references and the calculated values by the twostaged utility model validates the feasibility of the proposed model. The model was applied to Chinese Railway Track System(CRTS)Ⅱ ballastless track slab with transverse dummy joints, from which satisfactory results of corrosion degree of steel bars were obtained.
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【参考文献】
中国期刊全文数据库
常立新;丁煜祥;程泽和;徐斌;;[J];工业建筑;2006年S1期
【共引文献】
中国期刊全文数据库
孙开科;;[J];山西建筑;2007年10期
王立久;张立卿;刘莎;;[J];建材技术与应用;2014年01期
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400-819-9993ANALYSIS ON RESOURCES AND ENVIRONMENT PRESSURE IN THE WUHAN URBANIZATION PROCESS--《Resources and Environment in the Yangtze Basin》2017年12期
ANALYSIS ON RESOURCES AND ENVIRONMENT PRESSURE IN THE WUHAN URBANIZATION PROCESS
HAO Han-ZHENG WZHONG Xue-TANG MCHEN Wei-Resources and Environment College,Hubei University of Science and TLand and Water Resources Research Center of the Middle Yangtze RXiannina Environmental Protection Monitoring SInstitute of Agricultural Economic and Technology,Hubei Academy of Agricultural SHubei Collaborative Innovation Center for Grain I
The deprivation of ecological environment and resources by rapid urbanization and the restriction of resources and environment on urbanization are hot issues in recent years. It is of great significance to measure the degree of coordination between urbanization and resource environment and to determine the type of coupling and coordination to guide healthy urbanization. This paper first constructs the comprehensive index system of urbanization and the sub-index of resource and environment pressure,which includes 16 sub-indicators. The abrupt progression method was used to calculate the urbanization comprehensive index. The entropy weight method was used to calculate the pressure index of resources and environment. The gray system method was used to calculate the correlation between the comprehensive index system of urbanization and the comprehensive index system of resources and environment pressure. According to the general system theory,the dynamic coupling model of urbanization and resources and environment is constructed,and the coupling degree and the type discrimination of urbanization and ecological environment in Wuhan from 2004 to 2013 are quantitatively analyzed. The results show:(1) the comprehensive index of urbanization in Wuhan increased year by year,especially in ,the urbanization level increased rapidly. The maximum value of comprehensive index of resources and environment pressure appeared in 2006 was 0. 629,the minimum value appeared in 2013 was0. 452.(2) The correlation value between the 0. 480-0. 911,most of the coupling degrees in the medium and strong in the two range. Soot emissions and industrial output value,built area,per capita electricity consumption,per capita GDP,urban population scale performance of the strong coupling(greater than 0. 85). Among the urbanized sub-indicators,the proportion of urban population and resources and environment are the most relevant.In the resource and environment sub-indicators,soot emissions and urbanization level of the coupling effect is the strongest.(3) The dynamic coupling model based on general system theory reflects the dynamic feedback process of urbanization-resource environment composite system. From 2004 to 2013,Wuhan has experienced four stages of coordination-conflict-coordination-conflict. The results show that the urbanization of Wuhan City-resources and environment complex system with the advance of urbanization, urbanization and resource environment, the contradiction is further apparent.
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(C)2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reservedNoise Reduction of Digital Image Based on Gray Correlation Degree--《Journal of Wuhan University of Technology(Transportation Science & Engineering)》2006年04期
Noise Reduction of Digital Image Based on Gray Correlation Degree
Hong Juntian~(1)) Tao Jianfeng~(2)) Li Gang~(2)) Gui Yufeng~(2)) Xu Xiaoying~(2)) (School of Mathematics and Statistics,Wuhan University,Wuhan 430072)~(1)) (School of Science,Wuhan University of Technology,Wuhan 430063)~(2))
In order to get a better effect of noise reduction while keeping the image details in the image processing,the idea of gray correlation degree of gray system is applied to an optimizing mean filter based on gray correlation.It tries to apply the gray correlation of gray theory to the area of mean noise reduction of image,and optimizes the value of the mean filter.The experimental result shows that the method is effective than the conventional mean filter method since a better effect can be got.
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supports all the CNKI
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