| 1. | Transverse vibration of an axially moving beam with fixed support by wave propagation
波传播法分析两端固支轴向运动梁的横向振动 |
| 2. | Methods of testing plastics - mechanical properties - tensile vibration - sonic - pulse propagation method
塑料试验方法.第3部分:机械性能.拉伸震动.试验方法323f :声脉冲传播法 |
| 3. | Methods of testing plastics - mechanical properties - longitudinal and shear vibration - wave - propagation method
塑料试验方法.第3部分:机械性能.径向剪切震动.试验方法323e :波传播法 |
| 4. | Then numerical algorithms are used to analyze integrated optical wave - guide and beam propagation method is a good method which is widely used
于是出现了用数值分析方法来分析集成光波导。其中，光束传播法就是分析光波导器件的一种好方法。 |
| 5. | The simulation using the bi - directional beam propagation method proves that the demultiplexer can have very low insertion loss and high isolation ratio
藉由双向光束传播法来仿真此组件，结果显示此解多任务器具有很低的插入损耗和高的隔离度。 |
| 6. | First , i made and improved some beam propagation method ( bpm ) programs , consisting of 2d ( eim - bpm ) and 3d bpm , with transparent boundary condition ( tbc ) and perfectly matched layer ( pml ) boundary condition respectively
首先建立了光束传播法( bpm )的模拟平台，解决了边界问题。利用建立的三维bpm平台设计了渐变折射率波导的mmi耦合器。 |
| 7. | Colin sparks : professor , school of media , arts and design of the university of westminster in britain ; director , communication and media research institute , university of westminster . research interests : media and democratization
桑德拉?布拉曼：美国威斯康星密尔沃基大学新闻与大众传播系教授，国际传播学会传播法与传播政策司主席。 |
| 8. | The study showed that the results of the problems analysis and experiences of agricultural extension activities after the description of the history of the agriculture technology extension system . the recommendation mainly focus on the following points : ( 1 ) to introduce new ideas to agricultural extension organization system ; ( 2 ) to improve the system by diversified extension methodology ; ( 3 ) to strengthen the reform by improving extension organization to be network with the styles in combination of education , marketing association ; improving extension management based on principles and regulation of market economics ; improving extension methods in diversification ; improving extension services in connection with a package technology ; improving extension mechanism by improvement of the linkage between research , production and teaching ; and improving extension input in diversified resources
( 3 )深化县级农技推广体系改革重点是加快“六化”进程，即推广组织网络化，建立公益型、经营型、协会型、科教型、龙头型等五大组织网络体系；推广管理市场化，遵循市场经济法则，对公益实行垂直管理、经营型实行企业管理、协会型实行章程管理、科教型实行信息管理、龙头型实行项目管理；推广方法多样化，采用项目扩散法、龙头带动法、基地示范法、协会引导法、信息传播法、行政推动法；推广服务系列化，围绕产前、产中、产后和产、加、销，以及农、科、教提供全程配套服务；推广模式一体化，促进产、学、研紧密结合；推广投入多元化，形成政府财政投入、民间资本投入、社会资本投入、外商资本投入等新格局。 |
| 9. | The finite difference beam propagation method ( fd - bpm ) can simulate the performance of the waveguide accurately . single mode rid waveguide structure parameters are derived by variational - effective index method ; fd - bpm and its transparent boundary condition ( tbc ) are concerned , and then the eim used to transfer a 3d waveguide to 2d waveguide is analyzed ; finally we summarize the characteristic of the y branch
本文先利用变分有效折射率法推导出满足单模传输的脊形波导结构参数;接着介绍了有限差分束传播法及求解的透明边界条件,同时分析了将三维结构转化为二维结构的有效折射率法,最后对y分支的特性进行了模拟。 |
| 10. | In order to design wavelength insensitive power splitter based on soi , the wavelength characteristic of mach - zehnder interferometer were investigated by means of bpm and fdm ( finite - difference method ) . then the parameters of mach - zehnder interferometer were optimum designed using genetic algorithm . besides , genetic algorithm is also used to optimize the upper tier parameters of mzi based silica - on - silicon to attain a flat spectral response
为了设计对波长不敏感的soi材料的mz功分器，利用束传播法( bpm )和有限差分模式解方法( fdm )对mach - zehnder结构的组成部分定向耦合器和相位延迟部分做了波长相关特性的计算，然后通过遗传算法优化设计了mach - zehnder的结构参数。 |
