主要研究了对数周期偶极子天线。
The log periodic dipole antenna(LPDA) is used as an object of study.
用对数周期振子阵作为背射天线的馈源。
The log-period dipole array is applied as a feed element for a back-fire antenna.
本文探讨减小对数周期天线尺寸的方法。
The method, which could diminish the dimension of Log-Periodic Dipole Antenna is discussed in this paper.
本文利用路-阵方法分析了对数周期偶极天线。
A log periodic dipole antenna is analyzed by using circuit array approach.
文章运用矩量法对大张角对数周期天线的电性能进行了分析。
The method of moments is used to analyze the electric characteristics of large Angle LPDA.
详细介绍了对数周期天线扇形阵特性分析软件的功能及使用方法。
The function and usage of the software for analyzing the fan-shaped array of log-periodic dipole antennas are introduced.
以对数周期天线圆形阵为基础，提出了一种比幅测向算法，并对算法性能进行了分析。
Based on a log-periodic antenna array, a direction-finding algorithm is put forward and its performance has been analyzed.
文中介绍了互联网络子结构分析方法，并应用该方法对对数周期偶极天线进行特性分析。
This paper presents a new method, the substructure analyzing method of interconnect-net, and analyzes the properties of LPDA.
建议把结构简单的对数周期天线，用于CAT V技术，并给出VHF全频道电视接收天线的实例。
Concerning the problem of application, the author suggests to use the simple LP antenna in the techniques of CATV, and a practical design for the receiving antenna covering all VHF TV channels.
用于电磁兼容试验的宽频带天线有很多类型，如双锥天线、对数周期天线、螺旋天线、喇叭天线等等。
There are all kinds of antennas used in EMC test such as biconical antennas, log periodic antenna, helical antenna, ridged horn antenna and etc.
文中所作的主要工作是为云南天文台十米抛物面设计、制造一付好的对数周期偶极子天线（LPDA）作馈源。
The major work of this thesis is to design and make a good LPDA(log-periodic dipole antenna)as the feed of the ten-meter parabolic reflectors at the Yunnan Observatory.
该阵列将对宇宙信号进行长期的探测，整个阵列能否稳定工作，取决于阵元天线(单面对数周期天线作为阵列单元)长时间稳定指向特定仰角的能力。
The array will be used to detect cosmos message for long time. Whether the whole array can work stably is decided by cell antenna ability of pointing to the specific elevation for a long time stably.
本文给出了用“三项理论”设计对数周期偶极天线(以下简称LPDA)的计算机程序，它能快速地设计出该天线的各几何参数和电参数，并可进行优化。
A computer program is given for log-periodic dipole antenna (LPDA) design with the "Three-Term" theory. The program can quickly design and optimize physical or electrical parameters of LPDA.
开发周期的缩短，对数据集成服务的需求的增长，促使Web开发人员探索新的技术来构建跨多个数据源的可嵌入式报表。
Short development cycles and increased demand for data integration services are prompting many Web developers to explore new techniques for building embeddable reports that span multiple data sources.
轴系扭振的模态对数衰减率正比于每个振动周期耗散的能量与峰值应能的比值。
This logarithmic decay ratio of the shaft set is in direct proportion to the ratio of the energy dissipated per cycle to the peak strain energy.
当你对数组使用选择排序，你选择最小的元素，其余的阵列每一个周期的循环。
When you sort an array using selection sort, you choose the smallest element in the rest of the array on each cycle of the loop.
本文讨论了采样周期对数字控制系统质量的影响。提出了选择采样周期的设计原则。
The paper discusses the influences of the sample cycle time on the quality of the numerical control systems and presents the design principles of choosing the sample cycle time.
在相同的参数下，振荡周期与铁磁-非磁层的对数有关。
The oscillation period and the oscillation amplitude relate to CO concentration, heating power PF and so on.
在一个产品的全部生命周期里对数据进行管理的过程。
The process by which data is managed throughout a product's life cycle.
细胞悬浮培养一个周期过程中细胞数目增长的动态基本上是一条S型曲线 ，对数生长期明显 ；
The cell number development of Viola diffusa Ging during a culture course was similar to a "S" curve with apparent logarithmic phase.
NLREG能够处理线性，多项式，指数，对数，周期性地，一般的非线性函数。
NLREG can handle linear, polynomial, exponential, logistic, periodic, and general nonlinear functions.
工程师对数据的研究通常要经过三年的周期，并对校准间隔时间做出修改建议。
Engineers study the data, usually over a three-year period, and recommend changes to calibration intervals.
数控软件自动化测试系统缩短测试周期，提高解决问题效率，增强用户对数控软件信任度。
Nc software automation testing system shorten the test cycle. and improved the efficiency of problem solving. enhanced the user trust for software.
数控软件自动化测试系统缩短测试周期，提高解决问题效率，增强用户对数控软件信任度。
Nc software automation testing system shorten the test cycle. and improved the efficiency of problem solving. enhanced the user trust for software.
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