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Shim current calculation When shim coils are excited by appropriate current, they can generate correcting magnetic field to compensate the imaging magnetic field unhomogeneity. Based on the indirect calculation method, we proposed a novel iterative optimization algorithm to calculate shim current. Because there is a direct proportion relationship between FID signal and magnetic field homogeneity, we use the intensity of FID signal as feedback information to the calculation. Shim current can be worked out in less than 3 minutes. This satisfied the requirement that active shimming should be performed in real time.

5匀场电流计算对匀场线圈施加适当的电流后才能产生校正磁场消除成像磁场的非均匀分量，本文在匀场电流间接计算方法的基础上，利用磁共振成像原理中磁场均匀性与系统FID信号强度成正比的关系提出了一种电流迭代优化算法，将系统FID信号强度的变化作为反馈信息，能够快速计算出匀场电流对成像磁场进行补偿校正，平均耗时不到三分钟，满足磁共振成像系统对有源匀场的实时性要求。

Shim current calculationWhen shim coils are excited by appropriate current, they can generate correcting magnetic field to compensate the imaging magnetic field unhomogeneity. Based on the indirect calculation method, we proposed a novel iterative optimization algorithm to calculate shim current. Because there is a direct proportion relationship between FID signal and magnetic field homogeneity, we use the intensity of FID signal as feedback information to the calculation. Shim current can be worked out in less than 3 minutes. This satisfied the requirement that active shimming should be performed in real time.

5匀场电流计算对匀场线圈施加适当的电流后才能产生校正磁场消除成像磁场的非均匀分量，本文在匀场电流间接计算方法的基础上，利用磁共振成像原理中磁场均匀性与系统FID信号强度成正比的关系提出了一种电流迭代优化算法，将系统FID信号强度的变化作为反馈信息，能够快速计算出匀场电流对成像磁场进行补偿校正，平均耗时不到三分钟，满足磁共振成像系统对有源匀场的实时性要求。

Therefore, it is of great urgence for retail enterprises to make good use of the opportunity that made by electronic business and information technology and to make out appropriate strategy so that the core competitive capacity can be immediately improved to meet the challenge from foreign competitors ,which serves as an exceedingly practical subject for research.

因此对于我国零售企业来说，怎样利用电子商务、信息技术所提供的机遇，制定适当的网络营销策略，通过恰当的方法提升零售企业的竞争力，迎接国外竞争的全面挑战，是一个非常现实的研究课题。

It was an appropriate choice, as it was Fleming who was to mythologise the new relationship in his James Bond novels.

这是一个恰当的选择，因为弗莱明在其詹姆斯？邦德系列小说了虚构了一种全新的关系。1953年，第一部小说《皇家赌场》出版，但是鲜有人关注。

Government needs an appropriate orientation to exercise in the process of specialized towns' economic growth,-actively intervenes at the initial stages and fades out as occasion serves.

专业镇经济是中山经济竞争的重要载体与组成部分，各级政府在专业镇与组团经济发展过程中发挥着极其重要的作用。

As a result, during the production process must be under control the appropriate production speed, it is necessary to ensure that the production schedule, while pushing out of Peel strength and combined.

因此，在生产过程中一定要根据实际情况控制好适当的生产速度，既要保证生产进度，又要保证挤出剥离强度和复合质量。

Given the relevance of paper, ink and color, using this book as a media to express this proverb is quite appropriate.

因为纸本与墨、色间的关系，因此用书本为载体来体现这句话是再恰当不过的。

Query-By-Example is appropriate as a quick start for users who are still acclimating to storing and retrieving objects with db4o.

样本查询适用于处于正在适应db4o的保存、读取对象这种新环境的初级用户。

Battens are most appropriate.profile, which is 380mm as a standard. Typically, there will

一般来说，每两个步长就有一个挂瓦条，因此挂瓦条的间距是760mm。

Such as this restaurant, the background singing soft French chansons with the appropriate volume

不是在行走中，是在静态中，比如这家餐厅，背景音乐柔柔淡淡的，恰如其分的存在感

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。