摘要：Permutation polynomials in finite fields are introduced for the first time into thedesign of full frequency hop codes(FHCs).Various kinds of full FHCs with good auto-and cross-correlation functions are presented in this *** example,the second class of FHCs are thebest full FHCs ever known.

摘要：无论是从事制造业的厂矿、从事商贸的公司、或是从事高新技术产品开发销售的集团、从事信息咨询服务的公司,还是银行、证券交易所、保险公司,甚至宾馆、饭店等,不管怎样,总会拥有一批新老客户,他们会随时需要业务、服务、产品开发进展情况及性能报价等信息资料。当然可以安排几名秘书小姐守候在电话机旁等候“上帝”们的垂询,也可以耗费大量的人力和财力从事广告宣传工作。

摘要：By way of employing a multimode method together with the multimode transmission matrixtechnique based on the theory of planar circuits, the paper presents computer-aided design and optimized de-sign of bandpass fllters with dielectric resonators, and their sample was tested. The experimental result ofthe sample shows a reasonable agreement with the designed one.

摘要：为解决传统行波光电探测器阵列仅能提高输出功率却不能同时提高工作带宽的问题,借鉴椭圆函数低通滤波器的设计原理,提出了一种高性能行波光电探测器阵列新结构。即将两个光电二极管级联后与待设计的滤波电路进行组合形成单个阵列单元,然后把单个阵列单元进行有效级联构成新型行波光电探测器阵列。文章对比分析了新旧行波光电探测器阵列在工作带宽、合成效率、回波损耗3个方面的性能情况。实验结果表明,新型行波光电探测器阵列在合成射频信号输出功率的同时,工作带宽提高至62.5 GHz,是传统行波光电探测器阵列工作带宽的2倍,并且降低了寄生参数带来的影响,性能更加优越。此外,新型行波光电探测器阵列的设计方法可以根据实际设计需求进行调整,设计步骤简练,满足各种工作方式的光电转换需求。

摘要：铷光谱灯作为被动型铷原子频标的重要部件之一,对铷频标整机性能的影响很大。为了满足高稳定性以及在真空、高温等特殊环境下正常工作的要求,从谱灯振荡电路稳定性、电屏蔽、热设计等方面着手,设计出一套新结构的谱灯。文中报道了该谱灯的设计思路和初步测试结果。

摘要：分析了加速器作为硼中子俘获治疗(BNCT)中子源的优势,提出以射频四极场(RFQ)加速器作为BNCT用中子源的首选机型。对该RFQ的参数进行了选择,利用质子轰击锂靶近阈反应产生的前冲中子束能散低、散角小的优势,设定RFQ最终能量为1.9 MeV。采用"匹配均温"设计方法进行了此强流质子RFQ的束流动力学设计,并对设计方案进行了传输模拟,在入口归一化均方根发射度为0.25 ***、流强为100 mA时,束流传输效率为99.3%。选择合适厚度的锂靶,经过整形即可得到满足BNCT治疗需要的中子束。

摘要：认知无线电是一种智能无线电通信系统，认知引擎的设计是其关键问题之一．认知引擎可通过推理与学习方法来实现认知无线电的感知、自适应与学习能力．为适合变化的无线环境，提出了用RBF神经网络设计认知无线电认知引擎的模型，根据经验知识和环境情况，动态重配置无线环境参数．基于802.11a仿真平台模拟认知无线电通信模型，经样本值训练神经网络，利用该网络学习信道特征，并建立基于RBF神经网络的认知引擎．在对感知信息学习后，实现根据无线环境和用户需求来配置通信参数的功能,仿真表明，这种认知引擎能有效地实现认知无线电的学习重构功能，其预测精度比BP网络模型高出了10％-30％．

摘要：　　取消漫游费如今成了时下公众讨论的热门话题.　　9月18日,联通副总裁李刚在北京邮电大学举行的一个讲座上发表了题为"电信营销与品牌战略"的演讲,他将中国移动不取消漫游费的主要原因归为漫游费收入占据了其总利润的相当大比例.以2005年为例,中国移动漫游费收入大约为490亿元,占了其利润的一半以上.……

摘要：The increasingly complex battlefield environment requests much closer connection in a team having both manned and unmanned aerial vehicles(MAVs and UAVs). This special heterogeneous team structure causes demands for effective organizational structure design solutions. Implementing adjustable autonomy in the organizational structure, the expected evaluation function is established based on the physical resource, intelligent resource, network efficiency, network vulnerability and task execution reliability. According to the above constraints, together with interaction latency, decision-making information processing capacity, and decision-making latency, we aim to find a preferential organizational structure. The proposed organizational structure includes cooperative relationships, supervisory control relationships, and decision-making authorization relationships. In addition,by considering the influence on the intelligent support capabilities and the task execution reliability created by adjustable autonomy, it helps to build the proposed organizational structure designed with certain degree of flexibility to deal with the potential changes in the unpredictable battlefield environment. Simulation is conducted to confirm our design to be valid. And the method is still valid under different battlefield environments and interventions.

摘要：The method and procedure of realizing parameter statistical correlation analysis ofbipolar analog IC’s are given,and the statistical model of parameter are constructed with doubleparameters(B_F,R_S).Based on the comparison and analysis of the circuit characteristics,it isshown that the method can be used for analysis and design of bipolar IC’s.