the definit approach of digging angle of altitude of by mechanically punching machine 穿孔机开掘天槽眼仰角的确定方法
the theoretic significance lies in that although both foreign and domestic scholars have made some study on this topic, from their papers, we could not find out a definit concept of the world manufacturing center 作者选择“全球制造中心概念研究”这个题目来作为硕士学位论文的研究题目,是考虑到选择该题目具有理论和实践两个方面的意义。
the change of this research approach can already excavate justice's essense, and does n't just empty talk justice problem with neglecting the change of social history, therefore it must have certain convincingness to definit the concept of justice and its characteristic 这样,既可以从深层次上挖掘公正的本质内涵,又避免了离开社会历史的变化去空谈公正问题
(3 ) the paper sort the influencing elements and parameters according to the importande using of hierarchy process; leaching . it also gets genera sort of biggest target of agricultural and ecological benefit according to comparative importance ., this paper verifies the sensitivity of program, and extends the apply scopes of hierarchy analysis method, at the same time, it can provid definit technology support and reference for establishing distrubiting pattern optimization modle of bid system in hetao irrigation district for the future (3)针对节水管理制度的影响因素众多,利用层次分析方法对影响因素、参数进行了重要性排序,得出了相对于农业、生态效益最大总目标的重要性总排序,并进行了方案的灵敏性检验,得出了在节水灌溉管理中应优先考虑的影响因素为控制地下水位。
wavelet analysis based on wavelet transform is the most perfect combination of functional analysis, fourier transform, spline analysis, harmonic analysis and numerical analysis at present, it is a new developing branch in mathematic . although some scholars solved differential equations of structure engineering using wavelet, there have some defects . such as the scaling function and wavelet function have not definit expression, some troubles existed in calculating connection coefficients, its values is instability in some times and so on 虽有学者将小波应用于结构工程中的微分方程求解当中,但是由于daubechies小波的尺度函数和小波函数均没有明确的表达式,在计算关联系数时则存在一定的困难,利用数值法计算关联系数有不稳定等一些缺点,还限制着其应用的广度。