查询词典 an array of stars

Feeding patterns of antenna array are researched and feeding network is designed. Three-unit and four-unit models for the cylindrically conformal microstrip antenna array are set up and their directivities are simulated respectively. Through the comparison of the simulation results, the four-unit array is proved to be feasible.

对天线阵列的馈电方式进行了研究，设计了天线阵列的馈电网络，建立了三单元和四单元柱面共形微带天线阵列模型，对方向性分别进行了仿真分析，比较仿真结果，选用了满足工程需要的四单元阵列。

The Periscope Drawtube will be bent because of the water resistance in sailing and this bend will cause the error of star measurement. Due to its especial structure, contactless measurement is the only way to measure its bend degree. First this paper introduces the method by linear array CCD based on structure and light path; Second it expatiates linear array CCD work principle and driving scheduling with example of TCD1501C and the driving circuit by CPLD. The output signal of linear array CCD includes common disturbance so the differential amplifier is needed. In order to make the signal adapt to computer processing, a threshold circuit with Schmitt characteristic and the data process following threshold are given. At last, some key problems in application are given.

潜艇潜望镜的镜筒在航行时受到水的阻力会产生弯曲变形，这种变形会造成潜艇对星体测量的误差；由于镜筒结构的特殊性，对其弯曲程度的测量只能采用非接触方法；首先从结构和光路方面介绍采用线阵CCD作为检测元件实现对镜筒弯曲程度的测量；其次以东芝公司的线阵CCD（TCD1501C）为例阐述了其工作原理及驱动时序的控制要点，并介绍了基于可编程逻辑器件的线阵CCD的驱动电路；线阵CCD输出的信号中含有共模干扰，必须采用差分放大器将其抑制；为将信号转化为适合计算机处理的数字信号，文中给出了有一定实用价值具有施密特特性的二值化处理电路及二值化后的数据处理过程；最后阐述了在实际使用中的一些关键问题。

This thesis mainly discuss following issues, Theory and simple expressions for array covariance matrixes are derived when angular spread functions are symmetric distribution functions, i. e. the Uniform distribution, the Gauss distribution, the Laplace distribution and the Von Mises distribution, and a non-symmetric distribution function, i. e. the Gamma distribution. And the relation between the effective signal subspace and the array number, or and the nominal angle of the distributed source, the angular spread, the distributed functions, and the Signal-to-Noise Ratio is gained. The dimension of the effective signal subspace increases with increment of the array number. And it is more obvious to the non-symmetric distribution. The dimension of the effective signal subspace decreases with increment of the nominal angle. And the distributed source is equal to a point source as θ=π/2. The dimension of the effective signal subspace increases with increment of the angular spread.

本论文针对阵列信号处理中广泛存在的分布源现象，主要讨论了以下问题：推导了角度分布函数分别为对称的均匀分布、高斯分布、拉普拉斯分布、Von Mises分布和非对称的伽马分布时，分布源阵列接收信号协方差阵的严格模型和简化模型，得到了单个分布源的有效信号子空间随阵元数、分布源中心角、分布角、角度分布函数和信噪比的变化规律：随着阵元数的增加，对所有角度分布函数的有效信号子空间维数也随着增加，且非对称分布函数的有效信号子空间充满整个空间的可能性更大；随着分布源中心角逐步增加，有效信号子空间维数逐步减小，当θ=π/2时，等价于点源情形；随着分布源分布角逐渐加大，有效信号子空间维数也随之增加，直到有效信号子空间充满整个空间；随着信噪比的增加，有效信号子空间维数有一定程度的减少。

An element of the array is accessed by its index while an element is obtained in memory by its address. So the conversion method from array index to memory address must be generated. In this paper, a novel algorithm of address generation using logic operation for multidimensional array is proposed.

行为级描述中通过数组下标对数组元素进行操作，而存储器的操作要通过存储单元地址来实现，因此需要将数组元素的下标转换成对应的存储单元的地址。

In this paper, firstly the differences between cylindrical array and uniform planar array are discussed in terms of eigenvalue distribution of the clutter covariance matrix and clutter distribution at range, and the conclusion of space-time clutter spectrum's nonhomogeneity at range for airborne radar with cylindrical array antennas is gained.

该文首先从圆柱型阵机载雷达杂波协方差矩阵特征值分布和杂波功率谱距离向分布两个方面分析了圆柱型阵列与均匀平面阵列之间的区别，得到杂波功率谱随距离变化的结论。

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。

The hierarchy architecture of the compiling system is presented. Thinking about the way of alignment and distribution of a array, the range of a index variable in a FORALL statement, and the subscript expression of the element of a array, the communication requirements in an array assignment are classified into three categories: no communication, SHIFT communication, and other type of communication.

综合数组的分布方式、对准、FORALL语句的空间索引变量范围以及数组元素的下标表达式，将程序语句中所隐含的通信划分为3种情形，即无通信、SHIFT通信和其它通信，指出了这种划分的意义，给出相应的通信检测算法，描述了具体的实现细节；详细讨论了SHIFT通信以及利用阴影区技术对它进行的优化，对于REMAP通信的典型形式及其优化也进行了讨论。

A biomimetic gecko adhesion array is proposed, which has active control ability and consists of three parts, flexible cantilever with control units, micron-scale seta array and nano-scale spatulae array.

在粘附阵列系统设计中，针对现有阵列不具有壁虎爬行运动特征的问题，提出了具有主动控制粘附和脱离能力的仿壁虎微纳米粘附阵列。

Due to the moving base existence of the minehunting and the frame structure characteristic of the sonar array,a new modeling thought in which the boat body coordinates is regarded as moving coordinates and the whirligig equation of sonar array compared with the self coordinates is founded on the basis of the Eulers theorem and the coordinate transform is introduced. The dynamic equations of minehunting sonar array with the state matrix form are founded by settling the dynamic models with the vector form. So it offers theory foundation for analyzing the dynamic characteristic and designing robust control.

由于猎雷艇作为动基座的存在和声纳基阵的框架结构特点，提出了以艇体坐标系为运动坐标系，运用变形的欧拉定理和坐标变换建立声纳基阵相对自身坐标系的旋转运动方程的建模思想；将所建立的矢量形式的动力学模型展开整理，获得了状态矩阵形式的猎雷声纳基阵动力学方程，为系统动力学模型的实用化奠定了基础。

We have carried out high density resistivity data processing standardization for one line with one suit of parameters through long line and multi-array data linkage processing, conquered the abuse of false anomaly and information lose for multi-array with different parameters, and resolved the problem that the disaccord of color bar with different array electric property profile and no illustration for the coordinate of profile with the chainage.

本文通过对高密度电阻率法勘探中的长测线多排列数据进行连接处理，实现了同一测线采用同一套参数的规范化处理，克服了因不同排列采用不同参数处理而导致假异常和信息丢失等弊端，同时解决了在成像时，因各个电性剖面的色标值不一致，剖面坐标与实际桩号对应不直观，导致对整个区域的电性趋势认识产生误导的问题。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。