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It is concluded that when a small solid angles range adjacent to the main direction in the far field is considered, the parallel beams combining of compact antenna arrays has its priority if the phases can be controlled, and the parallel beams combining of sparse antenna arrays has its priority if the phases can not be controlled.

分析表明:当关注的是远区主方向邻近的小立体角区域时,若能做到控相激励,宜采用紧凑的平行波束合成;若不能控相,宜采用稀疏的平行波束合成。

The Airy function is used to calculate the plasma impedance and the grill-plasma scattering matrix is deduced, then the coupling properties of the HT-7 LHCD MJ launcher are studied with the antenna scattering matrix and the grill-plasma scattering matrix based on the liner coupling theory. The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides.

采用线型耦合理论,用艾黎函数计算了等离子体阻抗,推导出常规波导对等离子体的散射矩,并利用它和天线自身的散射矩研究了HT-7装置低杂波多结波导天线的耦合特性;计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。

The operative method was wavefront aberration-guded Lasik with Allegretto wave- light and Mona-2 keratome.

手术方法为波面差引导下鹰式准分子激光角膜原位磨镶术,采用WAVE-LIGHT公司的波面差仪和ALLEGRETTO鹰式准分子激光机,法国MORIA-2自动角膜板层刀。

In view of the development about the certain airborne radar antenna array,considering the structural features of antenna array,analyse the cruces in manufacturing of feed cavity and radiant plate,and present the corresponding solution by mainly dealing with precise positioning style,delicate clamp design,error distribution and compensation method,high speed machining technology design,machining simulation and program optimizing.

某机载雷达平面裂缝列天线的单面如图1所示。该面布置多路裂缝线源,共分布384处长度各不相同的辐射裂缝,每一路线源均由脊型波导口单独馈电。面由辐射板和馈电腔两个零件组成,采用整体钎焊成形。线源结构为非对称单脊共线形式,即在普通单脊波导的两侧与辐射裂缝相对应的位置上布置不对称的凹台。

The use of a large number of wires in annular Z-pinch implosions has enabled the generation of strong X rays,which is significantly affected by the structure of the wire-array and the assembly precision of the wires.

在利用金属丝Z箍缩产生强X射线辐射的方法中,为获得超强X射线,一般采用直径几μm的钨丝构成单、双或多层圆柱面状丝负载,其中丝负载的结构和装配精度是关键因素。

The results of its 1D test demonstrate that the MARED code is suitable for simulating implosions on different devices and with a wide range of load parameters. Combination of the wire-array Z-pinch experiment simulation and analysis shows that under the same load conditions, the X-ray radiation power produced by the tungsten wire-array implosion is much greater than the power generated by the aluminum wire array. With the same load current, the greater load mass gains the lower X-ray power.

结合丝Z箍缩实验的数值模拟和分析表明:相同负载质量条件下,钨丝内爆产生的X光辐射功率远大于铝丝产生的X光功率;相同负载电流条件下,负载质量越大,计算得到X光功率越低;X光功率随着负载电流增加而增加。

By the modem time series analysis method, based on the ARMA innovation model, under the linear minimum variance optimal information fusion criterion, three distributed fusion steady-state optimal Kalman filters, predictors and smoothers weighted by matrices, scalars, and diagonal matrices are presented for multisensor systems with correlated input and observation noises, and with correlated observation noises. The Lyapunov equations and formulas of computing local filtering, predicting and smoothing error variances and covariances are given, which are applied to compute optimal weights. The corresponding three distributed fusion Wiener state estimators are also presented.

应用现代时间序列分析方法,基于自回归滑动平均新息模型,在线性最小方差最优信息融合准则下,对于带相关输入噪声和观测噪声和带相关的观测噪声的多传感器系统,提出了按矩加权、按标量加权和按对角加权的三种分布式融合稳态Kalman滤波器、预报器和平滑器,其中提出了局部滤波、预报和平滑估值误差方差和协方差的Lyapunov方程和计算公式,它们被用于计算最优加权,也提出了相应的三种分布式融合Wiener状念估值器。

Using the method of Green's function, the coupling between conformal antennas is analyzed. The mutual coupling between the E plane and the H plane are calculated, and the effect of the curvature and space between to the mutual coupling are discussed.

本文利用格林函数法分析了微带天线元之间的互耦效应,得到了矩形微带单元元之间E面、H面的互耦结果,并讨论了圆柱曲率半径和元的间距对元之间互耦的影响。

In the device fabrication, first by the low implantation on the top of the device the isolation between elements in arrays is achieved, and then the deep implantation on the upper layer down to the active layer can provide the transverse current confinements in individual elements in arrays. At the same time the thermal interaction between elements in arrays has also been studied.

在四次质子注中国科学院博十学位论文摘要入制备VCSEL列器件的设计中,一方面通过对外延片上DBR反射镜的较浅的质子注入形成高电阻区域实现对列器件中的单元器件之间的隔离,另一方面通过再次的较深度的可以达到有源区上表面的质子注入形成高电阻区域实现对单元器件中注入电流的限制作用c在对VCSEL列器件的设计中,对单元器件之间的热相互作用也进行了分析。

Firstly, in contrast to the dipole resonator, the folded dipole resonator is used to improve the frequency responses. Secondly, two types of folded Yagi-Uda arrays are fabricated, one is the original array with uniform length and spacing, the other is the optimum array with perturbed length and spacing to obtain a higher directivity gain.

首先,应用摺叠式耦极谐振器取代原有耦极谐振器以改善频响应,接著设计组摺叠式Yagi-Uda天线,一是保持均匀长与间距的初始,一是微调长与间距的优化,以得到较高的方向增。

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I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像,后来回台湾,甚至去年在北京,居然也四处看见她的海报,才惊讶她的魅力之大。

Ah may dee:You are chinese living in a democratic country.

你是居住在民主国家的中国人吧。