查询词典 three-dimensional imaging

Fourthly, it discusses the spectral image loss-less compression by applying thecorrelation and the entropy of the spectral image sequence. It gives and analyses three expressions of imaging spectrometer images, and tells the change in correlation coefficient and entropy for different expressions. At last, it puts forward D2PCM de-correlation method to reduce the spatial and spectral redundancy.

根据成像光谱图像的空间、谱间相关性和信息熵的特征，提出成像光谱图像序列的三种表示方法，分析了不同表示方法的相关系数和图像信息熵的变化，并研究出了成像光谱图像的无损压缩方法，即利用D~2PCM方法对光谱图像序列进行去相关处理，同时降低图像的空间和谱间冗余，在提高了无损压缩的压缩比和压缩效率的同时，算法具有简单快速的优点。

There are three main molecular imaging techniques: molecular probes,signal amplifications and supersensitive survey meters.

实现真正意义上的分子影像学技术的三大要素为分子探针、信号放大和高灵敏探测仪。

Results Three to six months after operation,X-ray showed firm healing(strong external callus or synostosis).99mTc-MDP bone imaging showed active bone metabolism in allografts early and resume normal by degree 2 years after operation.

结果 手术后3～6个月在X线片显示牢固的生物固定(坚强的外骨痂或已骨性连接)、99mTc-MDP骨扫描图像显示异体骨早期代谢活跃，2年后逐渐恢复正常。

By studying on isotopic chronology, terrane configuration and imaging logging data, the diabase intrusion in Zhanhua Sag is formed by tholeiite magma emplacing in Shahejie formation stratum on the rift tension background Lower Tertiary in North China. The diabase intrusion of Luo151 is composed possibly of three periods magma emplacement.

根据同位素年代学、岩体形态及成像测井资料的综合分析，沾化地区辉绿岩侵入体为早第三纪华北东部地区大规模裂谷拉张背景下，拉斑玄武岩岩浆侵位于沙河街组地层中形成，研究区内罗151井区辉绿岩体可能由三期岩浆侵位形成。

Once imaging catadioptric step zoom is proposed so that three bands such as weak light,white light and near infrared share the same optical system.

为使微光、白光和近红外三个波段共用一个光学系统，提出一次成像折反射式变焦，并进行了理论分析和给出了设计实例。

Methods Twenty-three cases of OSAS patients proved by polysomnography were examined with MRI. The cross-sectional area of retropalatal region, retroglossal region, epiglottal region and the lateral parapharyngeal fat pad of RP region was calculated. The thickness of bilateral and posterior pharyngeal wall and other indices were also measured. 30 nonsnoring age-matched normal subjects were selected as the control group. 15 patients underwent turbo field echo T1-weighted imaging during sleep. The images of RP, RG, and EPG were analyzed. Results In oSAS group, the cross sectional area of RP and RG regions was smaller than that of the control group.

应用MRI对23例经多导睡眠监测（polysomnography， pSG）确诊的OSAS患者及30例无打鼾的健康成人进行上气道检查，于轴面图像测量软腭后区（retropalatal region， RP区）、舌根后区（retroglossal region， RG区）和会厌区（epiglottal region， EPG区）的气道截面积，各区前后、左右径及其比值，各区咽侧壁、咽后壁软组织厚度，RP区咽旁间隙（lateral parapharyngeal fat pad，LPFP）截面积，于正中矢状面图像测量软腭厚度、长度及截面积，对两组各项检查指标进行统计学分析。

Using chicken eggs and a state-of-the-art imaging device which can reveal how cells move in three dimensions, the researchers demonstrated a key difference in the way gastrulation occurs between higher vertebrate species and less evolutionarily advanced animals.

利用鸡卵和能反应细胞三维移动的最新成像设备，科学家证明了高等脊椎动物和低等动物之间原肠胚形成的差异。

The position and benigent or malignent of the masses could be diagnosed with combination of these three imaging methods, but it is still difficult to make histodialysis.

电子束CT平扫、腮腺造影CT和三维CT相互结合，可以正确区分腮腺肿块的位置和良、恶性，但对于确定其组织学性质仍有一定的困难。

"The tools now exist that you can take a design and build in color variations and provide three or four examples of that material," says Scott Laurin, application specialist at Midwest Imaging and Roller Systems.

&现在的工具存在，您可以采取设计和建造的颜色变化，并提供三个或四个例子，该材料说，&斯科特劳林，应用专家中西部地区成像及轧辊系统。

The research for the three-photon correlated imaging with incoherent light of lensless Fourier-transform is reported.

首次从理论上提出了利用非相干光场在无透镜的情况下，得出高阶干涉光的三阶关联函数解析式，并证明了非相干光场通过傅里叶变换，完全能够实现多光子的关联成像。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失