Synthetic Aperture Imaging Ladar ( VI): Space-Time Speckle Effect and Heterodyne Signal-to-Noise Ratio Analysis on the Position Sensitive Detector Positioning Error Caused by Laser Spot Using New Three-Ray Model 合成孔径激光成像雷达(VI):时空散斑效应和外差探测信噪比采用三线位置敏感探测器定位模型分析光斑对定位精度的影响
Aperture atomizer Experimental of effect of water mist nozzle injection pressure on fire extinguishing 喷孔式喷油嘴喷雾器细水雾喷头喷射压力影响灭火性能的实验
The discharging capacity is controlled by a rotary flow generator and the barrage size, the influence of the barrage aperture on discharge is obvious, but the effect o. 泄流能力由起旋器与阻塞共同控制,阻塞孔径对泄流量影响较大,但阻塞位置对流量影响不明显。
Furthermore, the larger the numerical aperture of the objective, the less the effect of the slant angle on the line image shape. 物镜的数值孔径越大,倾角对线结构成像的影响越小。
Results of simulation show that the range of the master satellite to micro-satellites has a greater effect on ambiguity in range but a smaller effect on ambiguity in azimuth, while aperture of micro-satellite has a greater effect on ambiguity in azimuth. 仿真结果发现,主星到伴随微小卫星的距离对距离模糊度的影响较大,而对方位模糊度的影响较小,方位模糊度受微小卫星天线孔径大小的影响较大。
Development of piezoelectric AE sensors and their calibration are presented. The problems of aperture effect and its influence on design, performance and calibration of AE sensors are discussed. 就采用压电原理的声发射传感器的发展及其校准问题作概述,对声发射传感器中的特殊问题孔径效应及其对传感器设计、性能和校准的影响进行讨论。
The Optically Controlled Phased Array Radar uses Optical True Time Delay ( OTTD), abates the limit to signal instantaneous bandwidth aroused by aperture effect, actualizes the scan in broadband and wide-angle range. 采用光纤技术的X波段光控相控阵雷达通过引入光实时延迟线OTTD,减轻了传统相控阵雷达因渡越时间和孔径效应对信号瞬时带宽的限制,实现了宽带宽角扫描。
Due to the restriction of aperture effect and the aperture traverse delay, it is difficult for a conventional phased array radar to get wide instantaneous bandwidth under wide scan scope. 由于孔径效应和孔径渡越时间的限制,传统的相控阵雷达难以在大扫描角下实现大瞬时带宽。
Aperture Effect of Probability Density Function of Speckle Field of Laser Beam in the Turbulent Atmosphere 激光大气传输光斑统计概率接收孔径效应
Aperture Uncertainty in A/ D Converter and Its Effect on Digital Receiver Performance A/D变换器的孔径不稳定及其对数字接收机性能的影响
Microphone array-based speech enhancement has great importance for speech communications and speech recognition. To reduce the aperture of the microphone array and to increase the effect of the speech enhancement will greatly broaden the application areas of the microphone array. 基于传声器阵的语音增强对于语音通信及语音识别具有重要意义,减小传声器阵的孔径并提高其语音增强的效果将十分有利于扩大其应用范围。
In this paper, a new blanket jamming approach to Synthetic Aperture Radar ( SAR) is proposed, and its effect to SAR image is analyzed. 该文提出一种新的合成孔径雷达(SAR)用压制干扰方法。讨论了这种干扰方法对合成孔径雷达图像的干扰效果。
In order to eliminate aperture effect and noise influence, the moving segmentation results are fused by means of region-growing method in current frame according to the detected results of the moving targets. 为消除孔径效应和噪声的影响,根据运动目标检测的结果,在当前帧利用区域增长法融合运动分割的结果。
Soft gain aperture effect from pump beam size inside the laser crystal is crucial for obtaining stable Kerr lens mode-locking and generating ultrabroad-bandwidth pulses in Ti ∶ sapphire laser. 增益介质中泵浦光束提供的软光阑效应对于实现克尔透镜稳定锁模及其超宽带光谱脉冲的产生具有非常重要的作用。
The aperture averaging effect connects the bit-error rate and covariance of log-irradiance. 孔径平均效应意味着要将误码率和对数辐射的协方差联系起来。
The research result indicated splitting distillation velocity of flow, distillation production sample weight, the purity of alcohol, temperature, solvent amount, temperature, funnel aperture are the outstanding effect on determination accurate. 结果表明:裂解蒸馏速度、馏出油取样量、乙醇纯度、温度、冷洗剂加入量、抽滤过程、砂芯漏斗的孔径是影响测定结果的显著因素。
Experiments test the influences of pressure, height, nozzle aperture and frog momentum on the fire control effect of fine water mist. 实验主要通过测定压力、高度、喷头孔径的大小和雾动量对细水雾灭火效果的影响。
The small aperture effect and the lens-Jike effect formed by model HAW aerodynamic laser window are analysed and studied experimentally, and the advantages making use of the aerodynamic laser window in high power gas laser are described. 本文分析和实验研究了HAW型气动激光窗口所形成的小孔光阑效应和类透镜效应对光束传输的影响,阐明了在高功率气体激光器中使用气动激光窗口的优越性。
This paper discusses the influence of the aperture smoothing effect on the spatial correlation. 本文讨论了接收天线孔径平滑效应对空间相关性的影响。
The leak of aperture is the main reason which affects the shielding effect. Therefore, the structure design of electronic equipment will directly affect its shielding effect. 孔洞、缝隙的泄漏是影响屏蔽效果的主要原因,因此,电子设备结构设计的型式将直接影响屏蔽效能。
The experiments show that the working fluid pressure and the size of the nozzle aperture have effect on the nozzle flow capacity, the droplet size and its distribution, the spray angle and the radical distribution of the spray flux. 测得了喷嘴流量、喷雾角、雾滴直径与压力的变化关系,以及雾滴粒径和喷嘴径向喷雾通量的分布情况。
However, the instantaneous bandwidth of signals is restricted for general phased array because of its transition time and aperture effect. 但是,基于移相器的普通相控阵天线在进行宽带宽角扫描时,由于渡越时间和孔径效应的影响,使信号的瞬时带宽受限。
It avoids some general problems with the traditional segmentation methods, such as the over-segmentation with mathematical Morphology, the instability and aperture effect with optical flow. 避免了传统分割方法的一些常见问题,如数学形态学的过分割问题和基于光流场方程的不稳定和孔径问题。
The finite aperture effect of these lenses on the imaging performance is also analyzed and the numerical simulation shows the contrast of the image distributes non uniformly and it will increase evidently with the ratio of thickness to aperture decreasing. 进一步考虑了有限透镜孔径对成像面上成像质量的影响,模拟结果表明:成像面上亮度对比度分布不均匀;且随着透镜孔径大小与厚度的比值减小,像的对比度将会增加。
We assume that human vision has aperture effect in saturation analysis. 我们认为,人类视觉对饱和度的分析,也具有孔径效应,在失去形状信息时,对饱和度的确定也会产生困难。
Exogenous Ca~ ( 2+) reduced stomatal aperture significantly in light, but it had no obvious effect on stomatal aperture in dark. 光下外源Ca~(2+)显著降低气孔开度,暗中则对气孔开度无显著效应;
The result shows that the bit-error rate decreases significantly when the aperture averaging effect is taken into account. 分析的结果显示,孔径平均后的误码率有明显的减小。
In the machining process of this kind of large aperture optics, edge effect will influence the quality of stitched optical mirrors. 对于此类大口径光学镜面的加工,边缘效应将会影响拼接后的镜面质量。
Establish the true model of the motion errors, research conventional motion errors and Aperture-Dependent errors in large synthetic aperture situation and evaluate the effect on imaging quality. 2. 建立真实的运动误差模型,研究常规运动误差以及在大合成孔径情况下运动误差所存在的孔径依赖性并评估其对成像质量的影响。
We find that the spectral degree of polarization at the output plane can be directly controlled by the width of the slit aperture. The effect of polarization shaping is also illustrated. 研究发现输出平面内的光谱偏振度可直接通过改变狭缝光阑的宽度来控制,模拟计算结果同时反映了狭缝光阑对偏振度分布的整形效果。