3.In this paper the influence of cooling condition in spinning on β crystal content in β crystalline phase IPP as-spun fiber and the relation of stretching condition with structure and properties of the drawn fiber arc studied.
6.Analysis and research were made for relation about max external pressure resisting capacity under condition of different ratio between straight section length and end arc radius on the flatted tubes with same circumference and tube wall thickness by using analytical technology of finite element.
8.Main parameters (liquid/gas ratio, Na++ concentration in solution, pH value of the absorbent solution, inlet SO-2 concentration, etc.) affecting SO-2 removal efficiency were studied. The relation between the loss of Na++ in solution and operation condition was studied.
9.The singularity of wavefunction at r= 0 and its relation with the potential are disscused. It is pointed that,under the condition that the radial wavefunction is square integrable,the singularity of R nl (0)=∞ is physically acceptable.
10.By analyzing the relation between the precipitation acidity and the SO_2 discharge intensity,soil acidity and meteorological condition,the impact factors of acid precipitation in the cities of Shandong Province were revealed.
