该研究表明，可采用组合频率法推求的潮位与波浪组合设计值作为制定海堤设计高程的依据。
The research shows that the design value combines tidal level and wave by composite frequency method is considered to be the reference for design levee elevation.
采用正交设计法，研究外植体、BA和NAA浓度三因素对苹果不定芽再生频率的影响。
The effects of explants, concentration of BA and concentration of NAA on regeneration rates of apple were studied using orthogonal design.
采用分段设计法研究水处理过程。
The water treatment process was studied by the segmented design method.
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