The siltation induced by wind waves in an entrance channel is one of the prime factors influencing the operation efficiency of a port. It is necessary to predict the siltation accurately for dredging and ship operatio...The siltation induced by wind waves in an entrance channel is one of the prime factors influencing the operation efficiency of a port. It is necessary to predict the siltation accurately for dredging and ship operation passing through the entrance of the port. However, it is difficult to apply the traditional method to predicting entrance siltation because of its complex computational procedure and lacking the data of ocean dynamic elements in the specified sea area. From the view of energy conservation, a direct relationship between wind conditions and sediment deposition can be founded. On the basis of the above methodology, an empirical formula expressed by wind conditions for forecasting the siltation in the entrance channel is set up. The wind conditions are easily obtained from the local meteorological stations or weather maps, so the formula established in this paper is more convenient and practical than the traditional method. A case study is provided, in which the emopirical formula is calibrated and verified utilizing the measured wind and siltation conditions in the entrance channel of the port. Comparisons between computed values and measured data show satisfactory aqreement.展开更多
AIM:To identify the risk factors and three single nucleotide polymorphisms(SNPs) of NOD2/CARD15 gene in inflammatory bowel disease(IBD) of the population in Zhejiang,China.METHODS:A case-control study was conducted us...AIM:To identify the risk factors and three single nucleotide polymorphisms(SNPs) of NOD2/CARD15 gene in inflammatory bowel disease(IBD) of the population in Zhejiang,China.METHODS:A case-control study was conducted using recall questionnaire to collect data on demographic,socioeconomic,lifestyle characteristics and dietary behaviors from 136 determined IBD patients and 136 paired healthy controls.COX regression method was used to screen the statistically significant risk factors for IBD.The polymorphisms of NOD2/CARD15 gene Arg702Trp,Gly908Arg and Leu1007fsinsC were genotyped and further compared between 60 patients with IBD and 60 healthy controls by polymerase chain reaction and restriction fragment length polymorphism.RESULTS:IBD occurred primarily in young and middle-aged people.The mean age for IBD patients was 42.6 years.The ratio of males to females was 1.23:1.COX regression indicated a higher statistical significance in milk,fried food and stress compared with the other postulated risk factors for IBD.None of the patients with IBD and healthy controls had heterozygous or homozygous SNPs variants.CONCLUSION:Milk,fried food and stress are associated with increased risk of IBD.The common variants in NOD2/CARD15 gene are not associated with IBD in China's Zhejiang population.展开更多
基金Supported by National Natural Science Foundation of China(No.50779045).
文摘The siltation induced by wind waves in an entrance channel is one of the prime factors influencing the operation efficiency of a port. It is necessary to predict the siltation accurately for dredging and ship operation passing through the entrance of the port. However, it is difficult to apply the traditional method to predicting entrance siltation because of its complex computational procedure and lacking the data of ocean dynamic elements in the specified sea area. From the view of energy conservation, a direct relationship between wind conditions and sediment deposition can be founded. On the basis of the above methodology, an empirical formula expressed by wind conditions for forecasting the siltation in the entrance channel is set up. The wind conditions are easily obtained from the local meteorological stations or weather maps, so the formula established in this paper is more convenient and practical than the traditional method. A case study is provided, in which the emopirical formula is calibrated and verified utilizing the measured wind and siltation conditions in the entrance channel of the port. Comparisons between computed values and measured data show satisfactory aqreement.
文摘AIM:To identify the risk factors and three single nucleotide polymorphisms(SNPs) of NOD2/CARD15 gene in inflammatory bowel disease(IBD) of the population in Zhejiang,China.METHODS:A case-control study was conducted using recall questionnaire to collect data on demographic,socioeconomic,lifestyle characteristics and dietary behaviors from 136 determined IBD patients and 136 paired healthy controls.COX regression method was used to screen the statistically significant risk factors for IBD.The polymorphisms of NOD2/CARD15 gene Arg702Trp,Gly908Arg and Leu1007fsinsC were genotyped and further compared between 60 patients with IBD and 60 healthy controls by polymerase chain reaction and restriction fragment length polymorphism.RESULTS:IBD occurred primarily in young and middle-aged people.The mean age for IBD patients was 42.6 years.The ratio of males to females was 1.23:1.COX regression indicated a higher statistical significance in milk,fried food and stress compared with the other postulated risk factors for IBD.None of the patients with IBD and healthy controls had heterozygous or homozygous SNPs variants.CONCLUSION:Milk,fried food and stress are associated with increased risk of IBD.The common variants in NOD2/CARD15 gene are not associated with IBD in China's Zhejiang population.
