In this dissertation an electromagnetic computational method is employed as rigorous vector diffractive theory for the analysis of subwavelength diffractive microlens . the design methods of subwavelength diffractive microlens are presented . the design examples are analyzed by the theory in the dissertation 本论文把电磁场的数值计算方法作为分析亚波长衍射微透镜的严格的矢量衍射理论,给出了亚波长衍射微透镜的设计方法,对具体的设计实例做了分析。
By reviewing o kind of housing pattern in towns of zhejiang province , this paper presents the concept of residential building with built - in shop and expounds its characteristics and influence on the town planning as a kind of housing pattern some suggestions for improving this kind of residential building ore proposed with a planning and design example 摘要该文通过对上世纪80年代在浙江城镇出现并盛行的一类居住模式的观察,提出商住一体居住建筑的概念,并且通过对它和其他几种城镇居住建筑类型的比较,讨论了这类居住建筑模式的特征和存在的问题,最后结合一个规划设计案例的讨论提出了相应的规划设计措施。
Therefore , drawing from the lower and upper limit designed height and steel limit destruction , the paper classifies the design destructive forms of bonded - strengthened beams into three categories ( i , ii , iii ) , and gets the relevant integrated formula for calculating flexural capacity and gives the relevant design example of engineering 由粘贴加固上、下限,引入钢筋的界限破坏,本文将粘贴加固受弯构件的设计破坏形态分为三类( 、 、类) ,并给出相应的承载力计算公式和各自的使用范围。
Then the neural network must be trained by the pre - splitting blasting engineer instances of the engineering database , and the system gives some typical design examples according to the typical geological conditions , to test the system ' s validity . when the system runs steadily , it can supervise the practice of pre - splitting blasting in cutting excavation , and enhance the reliability of in site pre - splitting blasting design scheme , efficiency and quality of construction . so the stability of excavated slope is enhanced 用现场的预裂爆破实例对系统的神经网络进行训练,然后针对一些典型地质条件进行预裂爆破设计,对系统的正确性进行测试,系统运行稳定后即可对路堑边坡的开挖中的大量预裂爆破实践进行指导,提高了现场预裂爆破设计的可靠性、工程效率和施工质量,从而提高了开挖后边坡的稳定性。
This paper presents a model of cosine basis functions neural network based on bp algorithm , discusses the relation between the algorithm of neural network and amplitude - frequency characteristic about the linear phase fir filter , introduces the convergence condition of neural network algorithm , and studies the optimal design example about the high - order fir double - band - pass filters 提出了一种基于bp算法的正弦基函数神经网络模型及算法的收敛条件,研究了该神经网络算法与fir线性相位滤波器幅频特性的关系,给出了高阶双通带滤波器的优化设计实例。