指向性

DPL输出激光指向性研究

Directive property of the laser beam in DPL

其次，利用Matlab仿真了输入信号频率、阵元个数、阵元间距以及输入信号的延迟等因素对线阵列扬声器指向性的波瓣宽度、旁瓣和方向的影响。

Secondly , we use Matlab to simulate the directive property of beam-width , side-lobe and beam-direction of linear loudspeaker arrays in different parameters such as the frequency of input signal , the number and distance between elements and the signal delay .

基于MATLAB的换能器阵列指向性分析方法研究

Research on the Directivity of Transducer Array Based on MATLAB

PE法计算楔形海底环境噪声垂直分布和指向性

The vertical distribution and directivity of ambient noise calculated by PE method in a wedge-shaped bottom

本文给出按LMS准则设计的自适应系统达到稳态时，系统指向性的一般表达式.作为信号和干扰之间的广义夹角的函数，提出计算主瓣宽度、干扰方向零点深度和极限分辨力的方法。

The general representation of steady state directivity of adaptive system designed under the LMS criteria is given .

HBVdna与其五项检测指标关系及意义词项的概念指向性&陈述与指称的语义理据

THE RELATIONSHIP BETWEEN HBV DNA AND FIVE-ITEM QUANTITATIVE DETECTION AND ITS CLINICAL SIGNIFICANCE Conceptual orientation of lexeme : Semantic motivation for the descriptive and referential functions of NPs

在此基础上，研究超声相控阵结构健康监测原理，分析超声相控阵波束指向性与扫描原理，利用超声相控阵技术控制Lamb波波束指向，实现对结构的扫描进而识别结构中损伤，并进行实验验证。

On this basis , ultrasonic phased array theory based structural health monitoring is researched . The directivity of Lamb wave and the scanning principle is analysed .

海马内的空间信息输出后，在伏核（Nucleusaccumbens，NAC）内与其它来源的信息进行整合，最终通过运动环路形成目标指向性行为。

Outputs from the hippocampus are then integrated with other inputs within the nucleus accumbens and finally initiate a goal-directed behavior through the motor circuit .

本文从Flash动画交互性的外在表现入手，探讨Flash动画中交互性的设计原则，提出Flash动画交互性的设计方法，对Flash动画的交互性设计具有指向性的意义。

This paper begins with the external forms of Flash animation interactivity , followed by exploring the principles and methods of interactivity design in Flash animation , thus contribute to the interactivity design in Flash animation with considerable directive meanings .

其次，采用KZK方程对指向性声源在空气中的传播特性进行了数值仿真，仿真过程中采用的超声换能器模型是实际测量得到的。

Secondly , the characteristic of directional sound in the air is numerically simulated using the KZK equation .

二极管泵浦固体激光器（DPL）输出光束的方向在某个微小范围内存在随机变化，这种光束指向性的波动在某种程度上严重制约了DPL的应用。

The output beam of diode pumped solid-state laser ( DPL ) has minute random variation in direction , which results in the restrictions on the appliance of DPL .

频率特异性三指向性麦克风在助听器中的应用结论：TEOAE测试较为快捷并有中频优势，而DPOAE则有很好的频率特异性和高频优势。

Advantages of Frequency Specific Tri-microphone Binaural Wireless Hearing Aid Technology TEOAE measurement is save time and superior in middle frequency range while DPOAE measurement is better frequency specific and superior in the higher frequency .

提出了一种基于阵列指向性二次型约束的优化算法，以提高最小方差无畸变响应（MVDR）波束形成对方向矢量的稳健性。

To improve the robustness of the Minimum Variance Distortionless Response ( MVDR ) beamforming to the array steering vector , a quadratic constraint method is proposed .

文中以一安装有理想指向性扬声器的矩形房间为例，计算房间的混响时间和各位置处的RASTI。

Loudspeaker with ideal directivity characteristics was considered . Reverberation time and RASTI at different positions in time of a room has a limitation value .

利用NAH变换与Helmholtz积分，提出了改进的远场指向性快速计算方法，与DRL方法相比，该方法对声源形状的适应性更强，计算精度更高。

The methods for quickly calculating of the far-field directionality are given by use of the NAH field transformation and Helmholtz integration . Compared with DRL method , it is more applicable and precise for various acoustics sources .

在吸取集聚经济学和产业经济学集中率系数思想的基础上，根据产业集聚的特征，构造了LQ系数，测算了我国区域物流产业聚集系数，分析了我国区域物流集聚的指向性和空间布局。

Based on economics of agglomeration and concentration ratio of industrial organization , LQ is established to measure the concentration degree of logistics and calculate agglomeration ratio of regional logistics . Based on the result , the tendency and spatial layout of regional agglomeration in China are analyzed .

本文以非线性声学为基础，从KZK方程入手，综合考虑了超声波在空气中传播的衍射效应、非线性效应和吸收效应，对超声波在空气中传播的指向性进行了比较深入的研究。

Based on the nonlinear acoustics and KZK equation , the diffraction , nonlinear and absorption effects are included in simulation . The research is about the directivity of ultrasonic in the air .

实验中利用扫描电镜和偏光显微镜，研究了铁电液晶盒内形成的聚合物网络具有指向性，其饱和电压为5V，完全可以与TFT相结合实现显示器的连续灰度。

With the scanning electro microscope ( SEM ) and the polarized optic microscope , the orienting of the polymer network formed in FLC was investigated . Its saturation voltage is 5V , which combined with the thin film transistor ( TFT ) will realize a continuous grey level display .

采用平特性电源时，熔滴过渡频率随送丝速度的增加而增加；焊接电压在16-20V时熔滴过渡频率及指向性都较高。

When using the CV power , the metal transfer frequency increases with the increase of the wire feeding speed . In 16-20V , the metal transfer frequency and its directionality can keep getting better .

本文利用KZK方程，通过频域法将超声波的基波和各次谐波分离，综合考虑衍射效应、吸收效应和非线性效应，并通过数值运算来描述它们的声场特性，获得其指向性特征。

In this model , the harmonics are separated from the fundamental and the diffraction , nonlinear and absorption effects are included . The numerical simulation is performed to describe the sound field characteristic and the directivity of ultrasonic in the air .

并以小球源为阵元合成一虚拟平面NFCA，用它对一平面喇叭换能器的近场测量得到远场指向性，并与远场实测结果比较，得到了相当吻合的结果。

Using a spherical acoustic source as the array element to synthesize a virtual plane NFCA , we measure the far-field radiation characteristics of a plane loudspeaker transducer made in the near-field , with result agree well with that measured in the far-field in a lake .

指向性声源的自由空间有源消声

Active sound control by diectional secondary sources in the free field

矢量水听器的指向性和相位特性的脉冲法测试

Directivity and phase measurement of vector hydrophone using tone pulse method

传声器指向性频率特测量工业电流互感器频率特性的新方法

New Method on the Measurement of Frequency Characteristic of Current Transformer

发射换能器指向性现场测试仪的设计与实现

The design and realization of projecting transducer directivity pattern field-testing instrument

广义指向性信号模型的基阵处理

Array processing based on generalized directional signal model with angular spread

一种改善圆阵波束指向性性能的加权方法

A weighting method for improving beam directivity of the circular array

能量守恒定律在指向性函数计算中的应用（Ⅱ）&用于不等距阵和综合

Applications of energy conservation law on unequally spaced array and synthesis

非旋转对称电声器件的指向性因子测量

Measurement of the directivity factor of a non-rotational symmetry electroacoustic device

每一种文化都有一种特定的指向性，文化的不同，造就了不同的智力特点。

As a result , different cultures foster different intelligence characteristics .