摘要：By using the expressions of the field parameters and with the aid of the Orthogonal DesignMethod,we optimized the design of the saddle delection yoke with a ferromagnetic *** results ob-tained agree with the practical *** is pointed out that the end ear and the distribution of the fieldparameter B0（z）have important effects on the deflection *** example is given,in which the elec-tron optical properties of the deflection coils having cosine distribution and finite length and that of the de-flection coils having distributed winding are compared.

摘要：基于自由空间法,设计研制了一套D波段透射率测试装置,对典型衣服、鞋底及快递包装进行了测试。该测试装置包括D波段矢量网络分析仪、高斯波束天线、双曲透镜、光学导轨以及固定夹具。采用直通反射-传输线(TRL)校准方法和时域门技术,提高了测试准确度,保证数据有效性。对10种厚薄不同的衣服进行了D波段透射率测试,测试曲线趋势与已报道文献结果吻合。对鞋底以及快递包装的透射率进行了测试,获得了与安保场景比较接近的数据,有利于安检系统的设计。

摘要：以提升遥感图像质量为目的,设计基于光谱重建技术的遥感图像复原方法。首先通过光谱反射率重建模型重建遥感图像光谱反射率;采用混沌优化算法改进混沌粒子群算法,采用其优化遥感图像光谱反射率重建模型参数,提升光谱反射率重建精度,然后依据优化后的光谱反射率、入射光亮度与透射率建立遥感图像复原模型进行遥感图像复原,最后进行了仿真实验,结果表明,本方法复原后的遥感图像清晰度高,在运动模糊条件依旧能够有效复原遥感图像,在不同波段时,复原遥感图像时的峰值信噪比高,对比度大,即遥感图像复原清晰度高、抗噪声能力优。

摘要：In order to obtain uniform exposure in variably shaped electron beam lithography,the beam current density and edge resolution on the target must not change for different spotshapes and *** key to the goal is the appropriate design of shaping deflectors.A linearand rotation compensation approach is *** of linear and rotation compensationfactors versus the distances between electron source image and centers of deflectors are measuredon an experimental electron beam column with variable spot *** experimental resultsare in good agreement with the calculated ones.

摘要：It is well known that IIR digital filters require quite fewer computations,comparedwith FIR filters,in order to meet stringent magnitude specifications when the phase distortioncan be *** approximately linear phase,however,can be also obtained with the IIRfilter by making use of a technique without increasing the *** on a certain numberof attenuation zeros in the pass band,a new approach is developed for the design of polyphasewave digital filters with exact magnitude responses and Chebyshev approximation of the desiredphase *** minimum number of attenuation zeros is estimated,and some examples areincluded.

摘要：A new analogue sampled-data active device, named as a switched-current operationalamplifier (SIOA), is presented. The use of active circuit elements may simplify drawing the circuitdiagram significantly greatly and may permit easier analysis and synthesis of SI networks. Anumber of all pole and elliptic (second-or third-order) switched-current (SI) filters are derivedfrom the switched capacitor prototypes. These can be used as simple self-contained filters or asfilter sections in the cascaded realizations of a higher order transfer functions. To illustrate theapproach, a fifth-order low-pass filter is designed.

摘要：采用等效传输线方法计算多层吸波材料的反射率,以吸波涂层在指定频率区间内反射率整体达到最佳吸波效果构造优化设计目标函数;然后,利用复化牛顿-柯特斯数值积分方法求解目标函数;然后,将遗传算法运用到目标函数的最优化求解过程中;最后,采用VC6.0编制了基于遗传算法的多层吸波材料优化设计软件。计算结果表明:在吸波材料数据库确定时,该软件可对指定频率区间内多层(层数不限)吸波材料进行优化设计,能准确计算出各层吸波材料的厚度、材料类别和材料的排列顺序,设计结果准确有效,遗传算法的利用大大提高了优化设计的效率。

摘要：近距动态电磁感应装置发射磁场的强度和均匀度直接影响收、发系统间信息传递的有效性和稳定性.该文以高射炮引信电磁感应装定系统为平台,依据电磁场理论完成了装备于炮口的有限长疏绕螺旋载流发射线圈内部轴向磁场分布均匀度的理论分析和数值仿真,提出了给定口径和轴向尺寸下轴向磁场分布均匀度较佳的优化结构,并对此进行了实验验证,理论数据与实测结果的良好吻合表明本文设计思想的正确性.文中的设计及实验方法普遍适用于其他电磁感应装置.

摘要：为削弱引射系统尾气对光传输的影响,依据将尾气排放到光传输区域以外的设计思路,运用数值模拟的方法,对引射系统排气管道内的流场特性及尾气射流影响区域开展了研究。通过对直管道以及弯管道内流场特性的数值分析和比较,给出了一种排气管道的结构设计方式。在给定系统出口速度的情况下,运用多组分输运模型,分别对无自然风和有侧向自然风状态下的尾气影响范围进行了分析,初步确定了尾气射流排出系统后的影响区域,并依据尾气影响区域,对管道长度及布置方式进行了研究。

摘要：In this paper,the theory of uniform filter banks using all-pass tilters is furtherdeveloped.A new structure of two stage filter banks using all-pass filter is proposed,The pre-stage is half-band filter with period,the post-stage is two sets of band-pass filter ***-stage filter stop-band just controls the don’t-care-band of the post-stage filter banks usingall-pass polyphase,so as to realize a continuous stop-band property Moreover,a method ofsynthesizing filter bank is derived,which eliminates aliasing and amplitude distortions of theanalysis/synthesis system Finally,an example is given.