查询词典 Doppler range

To this end the original 'Blue Fox' radar is replaced by Ferranti 'Blue Vixen' coherent pulse-Doppler track-while-scan radar to improve acquisition and look-down capabilities, and other improvements are a MIL 1553B digital databus (making it possible to carry Sea Eagle anti-ship and ALARM anti-radar missiles) and the installation of the Marconi Sky Guardian 200 RWR, the JTIDS for secure voice and data links, two additional underwing hardpoints, wing tip stations for two AIM-9 Sidewinder short-range AAMs, wing improvements, a revised cockpit with HOTAS controls, larger drop tanks, provision for 25 mm Aden 25 cannon in place of the elderly 30 mm weapons, and possibly a Plessey missile-approach warning system.

为实现这一目的，原有的"蓝狐"雷达被新型的"蓝雌狐"连续波脉冲多普勒雷达替换，该雷达具有搜索的同时锁定目标的能力，可下视下射。其他改进包括加装军用1553B数据链，这使得MK2可以使用"海鹰"反舰导弹和ALARM反雷达导弹。另外加装了马可尼"天空哨兵200"通信系统，JTIDS保密语音及数据链路。增加了两个翼下外挂点，翼尖挂架可携带两枚AIM-9"响尾蛇"近距空空导弹。细节的改进还包括：机翼设计有所改进；改进的座舱设计；更大的副油箱；采用阿登25mm机关炮代替了以往的30mm机炮；可能加装了导弹告警系统。

ABSTRACT In this dissertation, in accordance with two projects from the National Defense Science Industry Committee:"The Laser Doppler Velometer for the Large-value and Wide-frequency-range Standard Negative-step-force"And"The novel kind Laser Vibrometer for vibration transducers calibration"have been studied deeply and systematically.

结合国防科工委85攻关项目："用于大力值宽频带标准力源发生装置中的激光多普勒测速系统"和国防攻关项目："用于加速度传感器复合灵敏度绝对校准的宽频带相位型激光测振仪"的研制。

Time domain algorithm,range-doppler algorithm and wave number domain algorithm are being discussed and compared on this foundation.

在此基础上，分别讨论时域算法、距离——多普勒算法、波数域算法并对其进行了比较，并对波数域算法的并行性做了初步研究。

Due to existing signal processing technology's shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high-precise signal processing technology:firstly,to get power spectrum with Hanning windowed Welch modified periodogram, search its peak value frequency;secondly, to apply zooming analysis via Goertzel algorithm;at last,to get a highly precise doppler frequency with energy centrobaric rectifying algorithm.

针对存在的缺点，本文提出了一种应用于激光多普勒测速的高精度信号处理技术，即首先利用加Hanning窗的Welch修正周期图算法得到信号功率谱，搜索其谱峰值频率，接着利用Goertzel频谱细化算法对搜索的谱峰进行细化分析，再引入能量重心频谱校正算法对细化后的谱峰进行校正分析，从而将离散频谱分析算法、频谱细化算法和频谱校正算法三者有机结合起来，充分发挥各自的优点：通过加Hanning窗的Welch修正周期图算法快速得到功率谱及峰值频率，通过Goertzel算法获得分析频带的高分辨率频谱，然后通过能量重心校正算法对细化后的频谱进行高精度校正，这样不仅保证了算法的高效性，而且大大提高了分析的精度。

The cumulative distribution of the ABI measured by the two methods demonstrated that the differences among them were not homogeneously distributed across the range of ABI value. The Doppler and oscillometric ABI readings were similar below values of 0.9, at values between 0.9 and 1.16 ,the readings were nearly the same line, whereas at values exceeding 1.16, the readings were not parallel.

5多普勒法与示波法测量所得ABI值结果之差均数为0.009(95%CI -0.24～0.2)，非常接近于0，在95%可信区间之外的人数为48例(4.8%)，在误差允许范围之内，表明两者一致性较好，并且这一差值随着ABI值的增加数值逐渐减小(r=-0.09，p=0.002)。

This paper is to study the calibration of the plural sensitivity of hydrophone using laser Doppler vibrometer technology in the frequency range form ten kilohertz to hundred kilohertz, and take steps to make the uncertainty of calibration in the stipulation scope.

本论文研究的内容就是在10～100kHz频率范围内，利用激光多普勒测振技术校准水听器的复数灵敏度，并采耳义相应的措施使校准的不确定度控制在规定范围内，满足实际使用要求。

It is shown that this kind of fuses with wide Doppler tolerance can detect long-range and high-speed targets.

分析表明，该引信具有很宽的多卜勒容限范围，能同时测定远距离和高速的目标。

Results (1) The operation time:the mean time was (40.3±6.1) minutes.(2) pathological examinations: a few necroses in endometrium (2/15 cases) and shallow myometrium (12/15 cases).(3) According to the skin radiation measurements of 20 cases, the highest dose was found in sacrum projection（32.88cGy）,came ovary(16.64cGy) and adrenal gland(16.64cGy) in the second and third. All the radiation doses was within the safe range in normal condition.(4) The collateral circulation from ovarian artery to uterus was confirmed by angiography and 3-D color Doppler imaging.

结果 （1）手术时间：平均（40.3±6.1）min；（2）病理检查：部分病例子宫内膜（2/15）、子宫浅肌层（12/15）出现少量的坏死，余未见异常；（3）患者术中所受X线辐射剂量：骶尾部皮肤处32.88cGy、卵巢16.64cGy 、肾上腺腰部皮肤投影处12.44cGy，均在正常安全剂量范围内；（4）侧支循环：经卵巢DSA造影及三维彩超证实术后卵巢动脉向子宫体提供少量的血流。

The signal processing of narrow-beam radars are in the given direction to which the beam is pointing, so the received interferences and clutters only come from that direction and thus the signal-to-noise ratio is relatively high, and target detection is only need to be performed on the range-Doppler spectra, which has a relatively low demand.

而宽波束雷达则会接收到所有方位上的干扰和杂波，信噪比较低，除了需要在距离-多普勒谱上检测出目标外，还需要分别形成目标的阵列快拍以获取其空间谱估计。

To this end the original 'Blue Fox' radar is replaced by Ferranti 'Blue Vixen' coherent pulse-Doppler track-while-scan radar to improve acquisition and look-down capabilities, and other improvements are a MIL 1553B digital databus (making it possible to carry Sea Eagle anti-ship and ALARM anti-radar missiles) and the installation of the Marconi Sky Guardian 200 RWR, the JTIDS for secure voice and data links, two additional underwing hardpoints, wing tip stations for two AIM-9 Sidewinder short-range AAMs, wing improvements, a revised cockpit with HOTAS controls, larger drop tanks, provision for 25 mm Aden 25 cannon in place of the elderly 30 mm weapons, and possibly a Plessey missile-approach warning system.

为实现这一目的，原有的&蓝狐&雷达被新型的&蓝雌狐&连续波脉冲多普勒雷达替换，该雷达具有搜索的同时锁定目标的能力，可下视下射。其他改进包括加装军用1553B数据链，这使得MK2可以使用&海鹰&反舰导弹和ALARM反雷达导弹。另外加装了马可尼&天空哨兵200&通信系统，JTIDS保密语音及数据链路。增加了两个翼下外挂点，翼尖挂架可携带两枚AIM-9&响尾蛇&近距空空导弹。细节的改进还包括：机翼设计有所改进；改进的座舱设计；更大的副油箱；采用阿登25mm机关炮代替了以往的30mm机炮；可能加装了导弹告警系统。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。