According to the application of photonic crystal and equivalent circuit theories in microwave range,a novel one-dimensional(1-D) defected ground structure(DGS) used in 50 Ω microstrip line is presented.Being different from the other periodic DGS,the etched lattices of the new DGS are not uniform.The theoretic analysis,simulations and measurements show that a wider stopband and less rippled passband can be obtained with the new DGS circuits.The central frequency and bandwidth of the stopband can be changed easily.

Temperature rising behavior of a series of metal oxides was studied under microwave irradiation. It was found that the metal oxides of VB、 VIII、 IB and IIB , especially Co_ 3 O_ 4 、 NiO、 V_ 2 O_ 5 exhibited good temperature rising behavior. Some non-noble metal oxide catalysts were prepared and their temperature rising behavior and the catalytic activity for oil fume purification were examined. The V_ 2 O_ 5 catalysts exhibited the stable temperature rising behavior and the highest catalytic activity. The addition of 1% La_ 2 O_ 3 to the supported V_ 2 O_ 5 catalysts enhanced the catalytic activity for oil fume purification.

为了获得连续二级反应的速率常数k1和k2,利用C++语言设计了一个计算机模拟程序.二级反应机理为A+Bk1→E+D,E+Bk2→C+D,反应物初始浓度为cA0,cB0,若t时刻反应物A、B的浓度可以测定,并令k2/k1=K,则有2(CA0-CA)-(CB0-CB)=CA[1-(CA/CA0)K-1]/(K-1),∫CACA0{(CB0-4CA0)CA+2C2A+C2A[1-(CA/CA0)K-1]/(K-1)}-1dCA=-k1t,根据上述2式用计算机模拟求解出反应的速率常数k1和k2.

利用计算机编程绘制出内扩散对连续反应选择性的影响图.在低转化率下,中间产物B的收率与A的转化率呈线性关系;在高转化率下,中间产物B的收率有极大值.相同的Φ值下,k1/k2值越大,内扩散影响越小;相同的k1/k2,Φ值越大,内扩散影响越大,与实验事实完全一致.在连续反应中,可以方便地从图上求得宏观反应的选择性,并根据需要确定反应条件.

利用QBASIC语言编制程序,并用计算机优化Pickeet方程描述了无机胺合成的ZSM-5分子筛吸附苯的行为.结果表明,此法在相对压力接近1的大范围内有很好的适应性,由此计算出的比表面积和经典的液氮温度下吸附氮所得到的结果基本一致.