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相对信号
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  relative signal
     RESULTS The in- crease of MRI relative signal intensity was statistically significant(0.28 ± 0.20 vs 0.66 ± 0.22)between group of PCNA LI > 50 % and group 5 % < PCNA ≤ 50 % (P <0.05); Peak-time was 5.58 ± 2.54 second vs 8.38 ± 3.66 second(P = 0.058).
     结果MRI相对信号强度增加值:增殖细胞核抗原标记指数>50%组为0.28±0.20; 增殖细胞核抗原标记指数大于5%,小于或等于50%组为0.66±0.22,两组比较P<0.05两组信号强度达峰值的时间分别为5.58±2.54和8.38±3.66秒,二者比较P=0.058。
短句来源
     Relative signal intensity(RSI) quantize the change of signal intensity in disc andassess objectively.
     相对信号强度(Relative Signal Intensity,RSI)对椎间盘信号强度的改变进行量化,显得更为客观。
短句来源
     The image was collected before and at 1 min,3 min,5 min,10 min,15 min,30 min,45 min and 60 min after contrast injection. The signal intensity(SI) was recorded in the region of interesting(ROI) in cortex,medulla,pelvic,and relative signal intensity(RSI) was calculated.
     观察并记录动态增强MRI注射对比剂Gd-DTPA前和注射后1min,3min,5min,10min,15min,30min,45min和60min肾实质和集合系统相对信号强度(RSI)。
短句来源
     Methods A total of 32 cases of astrocytoma proved by operation and pathology were reviewed. MRI quantitative parameters, the relative signal intensity on T1WI, T2WI (RSI 0), Gd enhanced T1WI (RSI Gd ) and EP were measured.
     方法 收集手术病例病理证实的脑星形细胞瘤 3 2例 ,计算MRI定量分析指标 :T1WI、T2WI上的相对信号强度 (RSI0 )、增强后相对信号强度 (RSIGd)及信号强度增加百分率 (EP)。
短句来源
     Methods Thirty-two cases of astrocytoma proved by operation and pathology were reviewed. MRI quantitative parameters, including the relative signal intensity on T1WI, T2WI (RSI 0) and Gd-enhanced T1WI (RSI Gd ) and enhancement percentage (EP) were measured.
     方法 收集手术病理证实的脑星形细胞瘤 3 2例 ,计算下列MRI定量指标 :T1WI、T2WI上的相对信号强度 (RSI0 )、增强后相对信号强度 (RSIGd)及信号强度增加百分率(EP)。
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  “相对信号”译为未确定词的双语例句
     The T1、T2 value;
     及T2WI上的相对信号不均匀性(RSH);
短句来源
     Apparent diffusion coefficient (ADC), the ratios of ADC and of signal intensity on T 2-weighted EPI and FSE T 2-weighted MR images in lesions to those in contralateral control areas were calculated.
     测量感兴趣区(ROI)及对侧相应解剖部位的表面弥散系数(ADC)值及T2W信号强度值,由此计算相对ADC(rADC)、T2WEPI和FSET2W相对信号强度比(rSIR)。
短句来源
     MRI was performed at 30min、24h、72h、1w after injury.
     全部动物于术后30min、24h、72h、1w行脊髓MRI检查,观察信号值高低,采用脊髓损伤区相对信号值的高低衡量脊髓损伤的程度及药物治疗效果。
短句来源
     OBJECTIVE To explore the correla- tions of MRI signal intensity and the expression of proliferating cell nuclear antigen(PCNA)in laryngeal carcinoma.
     目的探讨喉癌组织磁共振成像(magneticresonanceimaging,MRI)相对信号强度与其增殖细胞核抗原(proliferatingcellnuclearantigen,PCNA)表达的关系。
短句来源
     (2) Based on the signal difference ofdifferent tissues on the different sequence, the relative intensity contrast betweennormal tissues and tumorous tissues can are enhanced by applying an intensityprocessing, named “gap transform” in this thesis to the normalized T1- and T2-weighted images. The the whole tumorous region can be obtained through thresholdanalysis.
     (2) 通过对比肿瘤化组织和正常组织在 T1、T2 加权图上的相对信号强度差异,我们提出了一种基于 T1/T2 加权图的差值变换,通过此变换各种组织的相对信号强度的对比得到进一步的增强,然后通过域值分析来实现肿瘤化区域的分割;
短句来源
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  相似匹配句对
     The T1、T2 value;
     及T2WI上的相对信号不均匀性(RSH);
短句来源
     An enhanced RASTA filtering of speech
     语音信号的增强相对谱滤波
短句来源
     Signal transduction of ataxia-telangiectasia
     AT的信号传导
短句来源
     Theory of Relativity & Theory of Relative Absoluteness
     相对绝对论
短句来源
     THE STUDY OF RELATIVE COULOMETRIC TITRITION
     相对库仑滴定法
短句来源
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  relative signal
Equations, describing the dilution, relative signal enhancement and maximum injection volume as a function of the process parameters are derived and experimentally verified.
      
This suggests relative signal size changes as the visual system matures.
      
It turned out that the observed relative signal amplitudes can satisfactorily be explained by only two parameters, the two multipole components of orderk=2 andk=4 of the alignment of the orbital angular momentum.
      
Its performance was studied with respect to relative signal change, reproducibility, and long-term use.
      
The PDA chip showed high relative signal ratios of HPV probe DNA hybridized with complementary target DNA, indicating an excellent capability in discriminating HPV subtypes.
      
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Using pulsed laser vaporization of graphite sample, both positive and negative ions of carbon clusters with cluster size up to 1200 can be generated routinely. The cluster ions were then analyzed on a time-of-flight mass spectrometer.lt is found from the mass spectra that those cluster ions no longer keep their original structure of bulk sample.Extensive structure re-organization might occur in the laser vaporization process, and fragmentations followed as they diffused into the acceleration region of the spectrometer.By...

Using pulsed laser vaporization of graphite sample, both positive and negative ions of carbon clusters with cluster size up to 1200 can be generated routinely. The cluster ions were then analyzed on a time-of-flight mass spectrometer.lt is found from the mass spectra that those cluster ions no longer keep their original structure of bulk sample.Extensive structure re-organization might occur in the laser vaporization process, and fragmentations followed as they diffused into the acceleration region of the spectrometer.By studies of the ion intensity as a function of cluster size, a structure conversion of carbon cluster from chain to planar ring with cluster size of 13 can be infered from the mass spectra.For clusters containing more than 30 carbon atoms, they may have closure structures. Among them, C_(60) was previously prosposed to have a perfect football structure. Studies reported in this paper support the presumption, but also showed that this super-stable cluster can be generated in a laser plasma instead of a supersonic molecular beam.

以脉冲激光蒸发石墨样品,可以产生含有多至1200个碳原子的原子簇正负离子。根据不同大小的碳原子簇离子的相对信号强度在质谱中的变化,可以分析出碳原子簇构型随着簇原子数的增加,所发生的从链状至平面环状再至空间封闭体的转化。

Abstract Binary cluster ions of carbon and silican as well as the cluster ions with an extra hydrogen atom were produced on a selfbuilt apparatus by laser ablating silican carbide mixed with polycyclic aromatic compounds. The recorded time-of-flight mass spectra showed the even/odd alternation of the relative signal intensities of the cluster ions. Valence structures of the binary cluster ions were discussed base on their mass distributions.

以掺有稠环芳烃的碳化硅为样品.在自制的仪器上通过激光溅射.产生了碳与硅的二元原子簇离子及由它们再结合一个氢原子的簇离子.从实验记录的正负离子的飞行时间质谱发现,这些族离子的相对信号强度具有奇偶交替变化的规律,并由此探讨了它们的价键结构.

From laser ablating teflon sample in a high vacuum,various cluster ions CnFm- CnH- and Cn-have produced on a home-made instrument. The statistical distribution model was applied to correlate the mass distribution with their structural configuration and stability. Based on the analysis,Geometry of several series of cluster ions was suggested. Anong them,CnF and CnF3- are believed to have the linear chain configuration, the fluorine atom or CF3 group locates on the end of the C- C chain. CnFn- may be the planar...

From laser ablating teflon sample in a high vacuum,various cluster ions CnFm- CnH- and Cn-have produced on a home-made instrument. The statistical distribution model was applied to correlate the mass distribution with their structural configuration and stability. Based on the analysis,Geometry of several series of cluster ions was suggested. Anong them,CnF and CnF3- are believed to have the linear chain configuration, the fluorine atom or CF3 group locates on the end of the C- C chain. CnFn- may be the planar ring,and each carbon atom in the ring is bonded with a fluorine atom. Several "magic number", such as C7F- and C5F4-, are distinguished in the mass spectrum.

在自制的仪器上,用高能量密度的脉冲激光束在高真空中直接溅射聚四氟乙烯样品,产生了非常丰富的C_nF_m~-簇离子.从实验记录的飞行时间质谱可以发现,不同系列的原子簇离子的相对信号强度分布可以用相应的对数正态分布曲线来描述,从而反映它们各自不同的构型与结构稳定性.

 
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