- 更多网络例句与信号噪声比相关的网络例句 [注：此内容来源于网络，仅供参考]
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Material and Methods:From March,2008 to January,2009,250 patients(146 Males and 104 Females,ranged from 18 to 82 years old,mean age was 48 years old) enrolled in the First Affiliated Hospital of Kunming Medical College were performed dual energy scan(Group A,200 patients) and Neuro-DSA scan(Group B,50 patients) using DSCT.The patients were randomly divided into Group A and Group B.Regarding to the justification of scan protocol,100 patients in Group A were selected as sub-group to explore the scan protocol.The image quality Was analyzed both in four categories(4.0/60、4.5/60、4.0/70、4.5/70) of flow rate and total amount of contrast-enhanced material and in three categories(100—150HU、150—200HU、200-250HU) of CT value of left common carotid artery.The comparison of two scan approach was based on image quality,radiation does, postprocessing methods,time of scanning and subtraction and data storage amount.To validate the diagnostic capability of DE-CTA virtual unenhanced images,100 patients in Group A were undergoing head scan both in routine non-contrast program and DE-CTA virtual unenhanced program.Mean CT values,signal-to-noise ratio,image quality,sensitivity of lesion identification,and radiation does were applied to comparison.According to diagnostic results of dual energy of cerebral arterial angiography,62 patients out of 200 patients in Group A were confirmed with cerebral vessel lesions,the results were complied with DSA findings(the time between the two methods were within 1 week).
材料与方法收集2008年3月到2009年1月间在昆明医学院第一附属医院行DSCT CTA检查者250例(男性146例，女性104例，年龄范围18-82岁，平均48岁)，随机分为A、B两组，A组200例行双能量头颅CTA扫描；B组50例行Neuro-DSA扫描。A组前100例按对比剂不同流率和总量分为4组(4.0/60、4.5/60、4.0/70、4.5/70)对图像质量比较；按触发时左颈总动脉内平均CT位分3组(100—150HU、150—200HU、200-250HU)，比较图像质量的差异；对A、B两组血管图像质量、辐射剂量、后处理的方法、扫描和后处理时间及数据的容量进行比较分析；A组中前100例行常规与DE-CTA虚拟平扫的平均CT值、信号噪声比、图像质量、病灶显示情况、辐射剂量的比较分析；A组中行DSA检查62例(两种方法间隔时间均1周内)，比较两种检查方法诊断结果是否符合，并对其中24例动脉瘤行动脉瘤部位、数目、形态、瘤颈显示程度、瘤颈大小及瘤体长径和短径的比较研究。
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By analyzing the faultiness of the wavelet method used in processing signal denoise and detection of weak signal.
通过分析小波变换处理信号噪声的方法及其在微弱信号检测方面的不够完善之处，提出适合于极低信噪比条件下小波消噪法的信号检测原理和方法，即通过构造具有可调功能的阈值函数以及对小波分解系数处理方式的优化设计等方法，在强背景噪声中提取出微弱的信号特征信息，从而实现微弱信号的检测。
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Because the Hall probe circuit, magnetic-flux meter circuit and extension measurement circuit share the same A/D converter, but MAX110 only have two channel, so the system use CD4052. CD4052 is the analog switch controlled by microcomputer, which can switch the three input channels. The singles is passed to microcomputer after A/D converted.
所有与模拟电路有关的低频接口控制线都采用光电耦合器TPL521进行隔离，而频率较高采用6N137构成单片机相关外围器件的隔离，以便抑制数字电路的尖脉冲和其他噪声对模拟电路产生干扰，提高系统的信号噪声比。
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HR-MRI not only improves spatial resolution of the tissue, but also increases the contrast of signal intensity between intercostal muscles and pleural lesions.
对比噪声比反映的是去除了背景噪声之后的病灶信号和肌肉信号之间的差别，对疾病的鉴别诊断有一定的意义。
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The hardest part of building a business is the signal to noise ratio.
建立企业最难的部分就如同信号噪声比。
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It requests high sensitivity of imaging media in order to guarantee good signal to noise ratio of images.
为保证透视图像具有良好的信号噪声比，这就要求所使用的透视图像记录介质具有高灵敏度。
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To improve the measuring accuracy and increase the signal-to-noise ratio in ultrasonic detection of concrete damage, a frequency-modulated ultrasound transmission method was firstly developed.
为提高混凝土超声检测的信号噪声比，提高测量精度，研究脉冲压缩调频超声发射的方法。
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To achieve satisfactory signal-to-noise ratios, compounds should be present in high concentrations or localized in specific organs or organelles.
取得令人满意的信号噪声比，化合物应在高浓度或本地化的具体器官或细胞。
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With microprocessor control of source and analyzer, the 8903B can perform stimulus-response measurements (such as signal-to-noise ratio and swept distortion) automatically with no additional equipment.
随着微机控制的源和分析仪，在8903B能激励响应测量（如信号噪声比和席卷失真）自动不需要额外的设备。
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With microprocessor control of source and analyzer, the 8903B can perform stimulus-response measurements (such as signal-to-noise ratio and swept distortion) automatically with no additional equipment.
随着微机节制的源和剖析仪，在8903B 能激励响应测量（如信号噪声比和席卷失真）自动不需要额外的装备。
- 更多网络解释与信号噪声比相关的网络解释 [注：此内容来源于网络，仅供参考]
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high rise zone：高层区
high rise lift 高层电梯 | high rise zone 高层区 | high signal-noise ratio 高信号噪声比
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.nr：噪声比
通过对椎体肿瘤影像的清晰度、信号强度比(SIR)和噪声比(NR)的比较,评价增强减影MRI在椎体转移瘤上的诊断价值. 结果增强减影MRI及增强T1、SE T1、T2、反转恢复序列(STIR)图像的SIR值分别为2.93、1.15、1.16、1.26、1.69.
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SNR Signal to Noise Ratio：信号噪声比
SCDMA Synchronous Code Division Multiple Access 同步码分复用 | SNR Signal to Noise Ratio 信号噪声比 | TDM Time Division Multiplexing 频分复用
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signal to noise ratio SN：信号噪声比
signal 信号 | signal-to-noise ratio (SN) 信号噪声比 | Signaling 传讯. 为了通讯目的而传送讯
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optical signal to noise ratio：光信号噪声比
散射之光学区 optical scattering region | 光信号噪声比 optical signal to noise ratio | 光信号处理 optical singal processing
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electrical signal to noise ratio：电气信号噪声比
电气噪声 electrical noise | 电气信号噪声比 electrical signal to noise ratio | 电磁双极(天线) electric-magnetic dipoles
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SNR：信号噪声比
如果你采用音量调整对整个音频范围应用一个恒定的增益,声道产生的声音以及变调的声音就会越大,用户收听到的声音就会越刺耳,信号-噪声比(SNR)就会越低.
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SNR：abbr. single to noise ratio; 信号噪声比
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output SNR：输出信号噪声比
输出处理 output processing | 输出信号噪声比 output SNR | 输出系统 output system
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threshold signal-to-noise ratio：阈值信号噪声比
threshold of response 响应阈 | threshold signal-to-noise ratio 阈值信号噪声比 | threshold speed 起始流速