Generate a single, secure password with no ambiguous, or easily confused, characters and at least one non-alphanumeric character.

生成一个安全的密码，其中不包含含糊(即容易混淆的)字符，至少包含一个非字母数字字符。

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Each secure element defines an alphanumeric character or other unique image that is visible only under certain conditions, i. e., when inspected through a viewer.

每个安全元素定义了仅在特定条件下，即当通过观察器检查时，才可见的一字母数字字符或其他独特图像。

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Now the system can achieve a recognition ratio of 94. 61%. The experimental result shows that the BP neural network can be used for handwritten alphanumeric character recognition successfully.

目前识别率为94.61%，实验结果表明，BP神经网络可成功地用于手写数字字符的识别问题。

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Now the system can achieve a recognition ratio of 94. 61%. The experimental result shows that the BP neural network can be used for handwritten alphanumeric character recognition successfully.

目前识别率为94.61%，实验结果表明，BP神经网络可成功地用于手写数字字符的识别问题。

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