Based on the rigorous coupled wave theory , the phenomenon that the zero order reflection efficiency of rectangular subwavelength grating varies with the wavelength is studied when incidence angle , azimuth and grating parameters are variant 摘要从严格耦合波衍射理论出发，在不同入射角、方位角和光栅参数下的情况，计算了矩形亚波长光栅零级反射效率随入射光波长的变化。
In order to settle this problem , basing on a power electronic controlled fast adjustable perterson coil , this paper provide a new principle of selecting the line with the fault , which make use of the dynamic changes in the current through the zero order line 为了解决这一问题，本文在一种由电力电子技术控制的快速调节消弧线圈的基础上，提出一种新的故障选线原理，利用线路零序电流的动态变化量来选线。
And beginning with a perturbed nls equation , using a multi - scales perturbation expansion , we get the zero order and the first order equations , discuss the eigenstates of the operator in the equations , induct relevant " derivative states " , form the completeness of the bounded eigenstates of the associated operator in li space , and expand the corresponding parameters in the closure , get a series evolution equations of the coefficients in the expanded formulas , find the first order approximate solution by researching the evolution equations . this paper also gives the basis of this method - the completeness we have formed and the singular perturbation technique ) dinser方程的求解问题，讨论了自伴算子的本征函数的正交性和完备性，介绍了寻求微分方程的近似解常用的摄动方法，并从带有某种扰动项的nls方程出发，利用多重尺度的摄动方法得到了方程的零级近似方程和一级近似方程，通过对近似方程中算子的特征态的讨论，引入适当的“导出态” ，建立了算子在l _ 2空间的特征态的完备性。
The effort of manganese removal was studied and the kinetics of manganese removal was tried to establish . the factors of dissolved oxygen concentration , fe2 + concentration , ph , p concentration and closing of the filter were studied to evaluate their effort for biological manganese removal , and the correlation of residual manganese and oxidation - reduction potential was also discussed . as the iron content of water was high , experiment results showed that the reaction was zero order , as the iron content of water was low , the reaction was first order . the time needed for the cultivation of biological manganese removal was 60 70 days . the filter operated at the filtration rate of 8 10m / h , silica sand of effective size 0 . 95 1 . 25mm filled the filter to a depth of 1200mm 试验结果表明,成熟后滤砂表面滤膜的x射线衍射图谱与mno _ x ? 5h _ 2o ( x = 1 . 86 )的x射线衍射图谱一样,滤膜成熟后的结构在进水物质不发生变化的情况下不发生变化;合适的碳磷比对生物除锰有明显的促进作用,试验条件下的投磷量不会对出水造成二次污染;生物除锰需要亚铁的参与,亚铁的存在除了能够促进微生物分泌胞外酶并刺激其活性外,还通过铁离子的变价传递电子,催化锰离子的氧化反应,从而促进对二价锰的降解。
By calcining low humidity pelleted kaolin , a kind of metakaolin pellet , inside which the macroporous structure developed ， has been prepared . the structure remarkbly benifits reactant ion transference . so , the variety has high acid leaching reactivity , even coarse as the pellets are , its reaction kinetic is still maintained zero order up to a significant conversion rate 在用盐酸加热浸取时，该类球粒内的铝质组分表现出高酸溶反应活性，不同粒级的该类球粒有相似的浸出率时间曲线，且大部分铝能被迅速浸出。
In order to study the photochemical activity of the product further , this dissertation , taking methyl orange as a deputy of organism , has studied the relation between the concentration of the organism and the reactive time during the process of light degradation , and , on the basis of the relation , the kinetic process of the photocatalytic degradation was achieved by the treatment on the curve of the organism concentration to the reactive time : zero order reaction of the high organism concentration , first order reaction of the middle organism concentration , second order reaction of the low organism concentration 在产品对有机物的光降解方面，本文主要以产品光降解甲基橙溶液为例，研究了光降解过程中，有机物浓度与时间的关系。并在此基础上，对有机物浓度与时间的曲线进行了动力学处理，得出产品光降解甲基橙的动力学过程分为三步，摘要即:高浓度时的零级反应、中等浓度时的二级反应和低浓度时的一级反应。
The h model reduction problem of a kind of uncertain nonlinear systems with multiple time delays is studied . model reduction methods are presented that can simplify the uncertain nonlinear systems with multiple time delays to be low order linear delayed systems or low order linear systems , or even the zero order input - output mappings . the output tracking problem of disturbed nonlinear systems is solved by the h control theory , the analysis method is proposed 探讨了多时滞非线性系统的h _模型简化问题，将高阶的不确定多时滞非线性系统分别简化为低阶的线性时滞系统、低阶的线性系统甚至简单的零阶输入输出映射；应用h _控制理论解决了受扰非线性系统的输出跟踪问题，给出了分析此类问题的一般方法；总结并说明了h _滤波问题可解的充分条件。
