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。
A name must contain at least one alphanumeric character.
名称必须至少包含一个字母数字字符。
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。
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。
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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