Added trackball support, video scaling option, portrait mode.

时间轨迹球支持，视频缩放选项，肖像模式。

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Then three spotlight mode SAR imaging algorithms are discussed and compared, including polar format (PF) algorithm, chirp scaling (CS) algorithm and range migration (rm) algorithm.

然后重点对三种聚束式SAR成像算法进行了讨论与比较，包括极坐标格式(PF)算法、线性调频测绘(CS)算法和距离走动(RM)算法。

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An engine model was established for the 4 cylinder 4 stroke gasoline engine. And the fuel MAP of the mode engine was obtained by scaling experiment.

针对四缸四冲程汽油发动机，建立了合理的发动机数学模型，并对模型发动机进行仿真标定实验，获得喷油MAP图。

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An engine model was established for the 4 cylinder 4 stroke gasoline engine. And the fuel MAP of the mode engine was obtained by scaling experiment.

针对四缸四冲程汽油发动机，建立了合理的发动机数学模型，并对模型发动机进行仿真标定实验，获得喷油MAP图。

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