secondary radiation

Principal component analysis of nine indexes influencing photosynthetic rate showed that solar radiation and air temperature can represent for the prime variable of primacy principal component approximately, and stomatal conductance can represent fr the secondary principal component.

对影响光合速率的9个指标的主成分分析表明，第一主因子的决定变量可以光照、气温为代表，第二主因子以气孔导度为代表。

The contrasting results show that sound intensity, radiation time and frequency are the main factors, and the secondary factors are test temperature, working mode and settlement time.

对比实验研究表明：声强、辐照时间和频率是影响破乳脱水率的主要因素，而实验温度、工作方式、沉降时间等为次要因素。

Formation of sulfuric acid aerosol form a binary mixture of sulfuric acid and water is one of the most important processes of secondary particles formation in troposphere, which can seriously affect the atmospheric radiation balance and climate change directly or indirectly.

由硫酸-水组成的二元混合物形成硫酸气溶胶过程是大气对流层中二次粒子形成的一个重要途径，它直接或间接的影响大气辐射平衡和气候变化。

Study of the method for calculation of the thermal stress and secondary force of bridge structure by solar radiation

桥梁结构日照温差二次力及温度应力计算方法研究

By using the principles of equivalent linearization, the nonlinear thermal stress and secondary force of prestressed concrete bridge by solar radiation are analysed with the help of general finite element programs.

根据等效线性化原则，借助一般有限元程序分析预应力混凝土桥梁的非线性日照温差二次力及温度应力；