苏州水网系列水质模型   总被引：1，自引：0，他引：1  

高维真 《地理学报》1989,44(1):47-56

为适应苏州水网水污染综合防治规划时进行水质预测的需要,本文提出苏州水网的非稳态系列水质模型,包括(1)网块水质模型,用于预测苏州网块水体水质年内(季节)变化;(2)分段水质模型,用于预测苏州城河逐段水质空间变化;(3)河网水质模型,用于预测苏州城河任一段面昼夜(逐时)水质变化。这些模型经过验证,获得满意的结果,并作了苏州水网的水质模拟和预测。  相似文献   

基于位置关系的地块矢量化成果检核算法研究     

施永胜  孙鸿睿  向南平 《地理空间信息》2006,4(1):75-77

矢量化已经成为GIS数据获取的一种中间手段,怎样提高矢量化成果的精度、对矢量化成果进行检核已成为研究的热点。提出了矢量化成果应满足的三个条件,对基于位置关系的地块矢量化成果检核算法进行了研究。  相似文献   

Non-specific immune response of bullfrog Rana catesbeiana to intraperitoneal injection of bacterium Aeromonas hydrophila     

张俊杰  邹文政  鄢庆枇 《中国海洋湖沼学报》2008,26(3)

Non-specific immune response of bullfrog Rana catesbeiana to pathogenic Aeromonas hydrophila was studied to 60 individuals in two groups.Each bullfrog in bacterium-injected group was injected intraperitoneally(i.p.) with 0.2 ml bacterial suspension at a density of 5.2 × 106 CFU/ml,while each one in control group injected i.p.with 0.2 ml sterile saline solution(0.85%,w/v).Three bullfrogs in both groups were sampled at 0,1,3,7,11,15 and 20 days post-injection(dpi) for the evaluation of non-specific immune parameters.It was observed that intraperitoneal injection of A.hydrophila significantly increased the number of leucocytes and that of NBT-positive cells in peripheral blood.Significant increases in serum bactericidal activity and serum acid phosphatase activity were also observed in the bacterium-injected frogs when compared with those in the control group.However,a significant reduction was detected in vitro in phagocytosis activity of peripheral blood phagocytes.No significant difference in changes in the number of peripheral erythrocytes,serum superoxide dismutase(SOD) activity,and lysozyme activity was detected between the two groups.It is suggested that bullfrogs may produce a series of non-specific immune reactions in response to the A.hydrophila infection.  相似文献