排序方式: 共有18条查询结果,搜索用时 15 毫秒
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建立具有色散性的水平二维非线性波浪方程,方程的非线性近似到了三阶。方程以波面升高和自由表面速度势表达的微分-积分型数学方程,给出方程的数值求解方法和算例,对方程积分项的处理给出了计算方法。计算结果与Boussinesq方程模型和缓坡方程模型的对应计算结果进行了对比。 相似文献
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Hyperbolic Mild Slope Equations with Inclusion of Amplitude Dispersion Effect: Regular Waves 总被引:4,自引:2,他引:2
A new form of hyperbolic mild slope equations is derived with the inclusion of the amphtude dispersion of nonlinear waves. The effects of including the amplitude dispersion effect on the wave propagation are discussed. Wave breaking mechanism is incorporated into the present model to apply the new equations to surf zone. The equations are solved nu- merically for regular wave propagation over a shoal and in surf zone, and a comparison is made against measurements. It is found that the inclusion of the amplitude dispersion can also improve model' s performance on prediction of wave heights around breaking point for the wave motions in surf zone. 相似文献
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测定矿物颗粒表面积的改进酸-碱滴定法 总被引:1,自引:0,他引:1
实验研究改进了测定矿物颗粒表面积的酸—碱滴定法,即应用改进BET方程求矿物颗粒的最大表面酸量({M+}T)和碱量({M-}T),并分别用改进酸—碱滴定法和N2—BET方法测定了12种矿物颗粒(3种粘土,8种氧化物和1种碳酸钙)的比表面积。结果表明,应用酸—碱滴定法不仅可得到合理的{M+}T和{M-}T值,而且提高了测定表面积和相应酸度常数的准确性,由改进酸—碱滴定法得到的表面积平均比用N2-BET方法测得的表面积大一个数量级,且二者有显著的相关性。 相似文献
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The advanced data mining technologies and the large quantities of remotely sensed Imagery provide a data mining opportunity
with high potential for useful results. Extracting interesting patterns and rules from data sets composed of images and associated
ground data can be of importance in object identification, community planning, resource discovery and other areas. In this
paper, a data field is presented to express the observed spatial objects and conduct behavior mining on them. First, most
of the important aspects are discussed on behavior mining and its implications for the future of data mining. Furthermore,
an ideal framework of the behavior mining system is proposed in the network environment. Second, the model of behavior mining
is given on the observed spatial objects, including the objects described by the first feature data field and the main feature
data field by means of the potential function. Finally, a case study about object identification in public is given and analyzed.
The experimental results show that the new model is feasible in behavior mining.
Supported by the National 973 Program of China(No.2006CB701305,No.2007CB310804), the National Natural Science Fundation of
China (No.60743001), the Best National Thesis Fundation (No.2005047), the National New Century Excellent Talent Fundation
(No.NCET-06-0618). 相似文献