Traditional image enhancement algorithm enhances the contrast grade and noise of image at the same time. So, noise reduction is needed.
传统图像增强算法在增强对比度的同时，也很大地提升图像噪声，需要对图像进行降噪处理。
By contrast, Anki estimates how soon you will next see the card right before you grade it (you are still supposed to grade by difficulty, but the dates are also right there for your consideration).
相反，anki是在你对卡片打分之前就估计你下次看这个卡片的频率(你仍然可以对卡片评分，不过卡片出现的日期仍然在那里)。
The contrast shows that the top grade engine oils are being developed toward fuel economic and environmental protection.
通过对比可以看出，高档内燃机油越来越注重节能以及环保的要求。
And I recall ensuring all my limbs were safely inside the moving vehicle, in contrast to her friend in grammar school who learned to write with her left hand after that grade eight field trip.
我记得那时她只是要使我安全地呆在飞奔的汽车中，不要把手脚伸出去。这和她的语法学校的一个朋友形成了对比，她的那个朋友在一次八年级的实地考察旅行之后学会了用左手写字。
In contrast, low grade papillary tumors demonstrate densely arranged but normal-shaped small cells extending outward from fibrovascular cores.
相反，低度恶性乳状瘤排列密集，但正常形状的小细胞从纤维血管核心向外蔓延。
Objective To evaluate the value of dynamic susceptibility-contrast MR perfusion imaging in the per-operative differential diagnosis between single brain metastasis and high grade gliomas.
目的探讨MR灌注成像在鉴别单发脑转移瘤与高级别胶质瘤中的作用及价值。
Conclusion: Tumor grade, a relevant predictor of disease severity, influences the accuracy of dynamic contrast techniques in the diagnosis of HCC.
结论：肿瘤分级是疾病严重程度的相关预测因素，可影响动态造影增强技术在肝癌诊断中的准确性。
The thesis tries to get the approval by means of carrying out task-based reading experiments in Yunhe High School, Tongzhou District, Beijing, with two contrast groups in Grade One in the year 2006.
本论文是通过北京市通州区运河中学进行实验来证实文章的中心论点，时间是2006年，实验对象是运河中学高一年级的两个班学生。
The thesis tries to get the approval by means of carrying out task-based reading experiments in Yunhe High School, Tongzhou District, Beijing, with two contrast groups in Grade One in the year 2006.
本论文是通过北京市通州区运河中学进行实验来证实文章的中心论点，时间是2006年，实验对象是运河中学高一年级的两个班学生。
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