The "crown diameter-crown height" correlation equations and the formulas of three-dimensional vegetation quantity of tree crown are established.
建立常见绿化树种“冠径—冠高”相关方程和树冠绿化三维量计算公式。
This paper analyses the physical constant constructing by dimensional method and introduces the important mean of dimension of quantity in physical constant constructing.
采用量纲的方法分析物理常数的构造，讨论了物理量的量纲在物理常数构造中的重要意义。
One-dimensional code is limited in its finite quantity of information, deficiency of error correcting ability, etc.
一维条码所表示的信息量有限，且不具备纠错功能。
A new diagnostic quantity-moisture helicity is derived from the moisture equation, and the difinition of helicity, and its influence factors are analyzed in details by the dimensional analysis.
构造了新的诊断量——水汽螺旋度，并对影响水汽螺旋度变化的因子做了分析。
A new diagnostic quantity-moisture helicity is derived from the moisture equation, and the difinition of helicity, and its influence factors are analyzed in details by the dimensional analysis.
构造了新的诊断量——水汽螺旋度，并对影响水汽螺旋度变化的因子做了分析。
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