查询词典 antenna

Finally, it analyses the time complexity of the algorithm and researches how it is influenced by culture operator.3、The paper presents the evaluation standard of the GA's application capability. Basing on characters such as continuity, multi-peak, vibration, randomicity as well as large-scale, five functions are selected to test search ability and robustcity of co-evolution algorithm. Finally, it analyses the simulation result and researches the influence of algorithm brought by culture operators.4、Basing on the concept of collection overcast, it researches the task distribution issue and constitutes delaminated math model on task distribution issue. It puts out the co-evolution algorithm of subtask's decomposing. The experiment compare IGA、SGA to CN and validates the efficiency of co-evolution algorithm on the NP completeness issue.5、Being aim at the optimization issue of load of antenna near ground, it combines many GA strategies and puts forward strategic meme. And it puts out co-evolution algorithm of load of antenna design. And it emulates the optimization design of load of antenna near ground. Finally, it valuates the co-evolution algorithm's efficiency on the continuum search issues of multi-variable and multi-peak value.6、Being aiming at the knowledge of image model matching, it adopts single meme and real code. It puts out fast co-evolution matching algorithm strategy. Basing on NPROD resemble measurement, I emulate the indiscrimination model matching and discrimination model matching. Finally, it valuates the co-evolution algorithm's efficiency on the real code and real time search issue.

分析了算法的时间复杂度，研究了文化算子对算法时间复杂度的影响。3、提出了GA的应用性能评价标准，从连续性、多峰性、随机性、振荡性、广域性多个角度出发选择五个测试函数，对共同进化算法的搜索性能和鲁棒性作了函数优化的性能测试，分析了仿真结果，研究了文化算子对算法的影响。4、基于集覆盖的概念，研究了MAS中的任务分配问题，建立了任务分配问题的分层数学模型，给出了子任务分解共同进化算法，实验比较了IGA、SGA、CN，验证了共同进化算法对NP完全问题的有效性。5、针对近地天线加载优化设计问题，结合多种改进GA策略，提出了策略型拟子，给出天线加载设计的共同进化算法，对有耗半空间对称偶极子天线加载优化设计作了仿真实验，验证了共同进化算法对多变量多峰连续搜索问题上的有效性。6、针对图像模板匹配问题的领域知识，采用单类拟子和实数编码，给出快速共同进化匹配算法策略，基于NPROD相似度测度，仿真试验了无差别和有差别模板匹配，验证了共同进化算法对实数编码和实时性搜索问题上的有效性。

It proposed the method of adjustment and optimization of the peripheral truss net surface integrating distance weighted factor and the genetic algorithm based on-orbit thermal environment for the first time, Optimization adjustment simulation of the net surface has been carried based on-orbit thermal environment for the large deployable antenna.The research of thermal analysis technology in this article would provide more scientific foundation for thermal design of antenna on satellite, it would greatly improved thermal design level for satellite antenna of our country, the thermal optimize design which were based on those would effective reduce the costs of test.

本文所完成的热分析技术的研究能够为星载天线的热设计提供更科学的依据，可大大提高我国星载天线热分析的水平，以此为基础的热优化设计可以有效的减少试验费用。

The present invention provides an antenna coupling preventing system and method capable of minimizing coupling between a GPS antenna and a CDMA antenna.

公开一种移动通信终端的天线耦合防止设备及其方法，该设备具有GPS天线和CDMA天线，根据工作模式，接收GPS信号和CDMA信号。

Finally, the four-unit cylindrically conformal microstrip antenna array is processed and tested. Testing results indicate that, the input VSWR of the antenna array in the vicinity of 1.575GHz is less than 2, the omni-directional performance good, 3dB bandwidth is about 90 degree on axial plane, right-hand circularly polarization good. Overall performance of the antenna array satisfies the design requirements.

对仿真获得的四单元柱面共形微带天线阵列进行了加工测试，测试结果表明该天线阵列在1.575GHz附近工作频带内输入驻波小于2，柱面法向平面全向性良好，轴向平面3dB波瓣宽度约为90。，右旋圆极化效果良好，天线整体性能达到工程设计要求。

At first, four analysis approaches of microstrip antenna are involved, then radiation principle of rectangular microstrip patch antenna by transmission line model theory which brings the design formula of rectangular microstrip patch antenna.

本文首先介绍了微带天线的四种分析方法，其中重点阐述了利用传输线法分析矩形微带贴片天线的辐射原理特性，由此给出了设计矩形微带贴片天线的设计公式。

Wire gauze ; mesh-reflector antenna ; weaving structure ; deployable antenna ; space-borne antenna

金属丝网布；网状天线；编织结构；可展开天线；星载天线

At 915MHz band, Yagi antenna, helical antenna, microstrip antenna array are designed, and the results of simulation and measurement are presented.

设计了工作在915MHz频段八木天线、螺旋天线、微带阵天线，并给出了仿真与测试结果。

The application of the fractal structure can be practiced solely on the antennas'design or with other methods. A miniaturized Yagi antenna is designed with the combination of fractal structure and ground plane, and size of the antenna is reduced to 61% compared with traditional Yagi antenna.

分形天线改善天线性能的方法和效果本身具有较强的独立性，一般不会对其他指标产生较大的影响，既可以单独使用，也可以与其它方法结合使用。

The present domestic satellite reception antenna controllers are basically designed according to the extreme value following principle. The satellite antenna controllers can aim at the satellite according to the carrier waver signals through driving the antenna to circumvolve repeatedly.

目前国内的卫星接收天线控制器大部分是按极值跟踪原理设计的，这种控制器需根据系统接收到的载波信号大小控制天线反复转动，才能对准卫星。

The hybrid antenna system also includes a displaceable antenna, such as a whip antenna, that is selectively extendable from and retractable with the casing.

该混合天线系统还包括可移动天线，它可以有选择地拉伸出或收缩入外壳中。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。