2009年写的一个船舶碰撞模拟器最近要求再产生一些数据,于是重新拾掇了程序。发现连接的mdb文件数据库在windows 7 64-bit上有问题:
Microsoft ODBC Administrator: The setup routines for the Microsoft Access Driver (*.mdb, *.accdb) ODBC driver could not be found. Please reinstall the driver.
找出原因如下:
We have an excel sheet that runs a report and get it's data from a database. The database that it gets the data from was recently moved to a different shared instance. I am now having issues setting up a new connection to the shared instance that the database now resides on. When I try to go in to try to add an ODBC I only have an option to setup a SQL server connection (No option to setup an Excel Files ODBC). If I try to configure the existing Excel Files ODBC I get the error
"The setup routines for the Microsoft Excel Driver ODBC driver could not be found. Please re-install the driver."
Once I click "OK" on that error another one pops up saying "Errors found: The specified DSN contains an architecture mismatch between the driver an application."
The system is running Windows 7 Enterprise (x64), has 6GB of RAM, an Intel Xeon E5620 (2.4GHz) and the version of office is Office 2010 Pro.
解决办法:
在64位机器上直接使用odbc 32-bit程序。
Use odbcad32.exe under %WINDIR%\SYSWOW64, you will find all the 32bit drivers enumerated. MS Access 32-bit ODBC driver is already shipped.
32-Bit Excel needs 32-Bit ODBC-Adminstrator odbcad32.exe which lives in C:\Windows\SysWOW64
64-Bit Excel needs 64-Bit ODBC-Adminstrator odbcad32.exe which lives in C:\Windows\System32
2014/06/18
2014/04/08
Skype Silk 与Opus的关系
Skype自2009年1月以来一直采用自己的SILK音频编码解码器,但是从2012年起过渡到新的Opus标准。Opus标准已经获互联网工程任务组(IETF)批准,标准格式为RFC 6716。它 是一个有损声音编码的格式,适用于网络上的实时声音传输。Opus支持6kbps到510kbps的可变比特率。由于是一个开放格式,Opus在使用上没有任何专利限制。
Opus合并了Xiph.org的CELT低延时音频编解码器和Skype的SILK语音编解码器,专为互联网音频设计,可用于替代现有的私有音频编解码器,由 Xiph.Org、Mozilla、微软、Broadcom、Octasic和Google联合开发。
目前软件包版本是Opus v1.1
Skype Opus Codec
Opus合并了Xiph.org的CELT低延时音频编解码器和Skype的SILK语音编解码器,专为互联网音频设计,可用于替代现有的私有音频编解码器,由 Xiph.Org、Mozilla、微软、Broadcom、Octasic和Google联合开发。
目前软件包版本是Opus v1.1
Skype Opus Codec
2008/03/04
latex数学公式
more refer to: wiki
多行的数学公式
多行的数学公式
可以表示为: \begin{eqnarray*} \cos 2\theta & = & \cos^2 \theta - \sin^2 \theta \\ & = & 2 \cos^2 \theta - 1. \end{eqnarray*}
其中&是对其点,表示在此对齐。
*使latex不自动显示序号,如果想让latex自动标上序号,则把*去掉
矩阵表示为: The \emph{characteristic polynomial} $\chi(\lambda)$ of the $3 \times 3$~matrix \[ \left( \begin{array}{ccc} a & b & c \\ d & e & f \\ g & h & i \end{array} \right)\] is given by the formula \[ \chi(\lambda) = \left| \begin{array}{ccc} \lambda - a & -b & -c \\ -d & \lambda - e & -f \\ -g & -h & \lambda - i \end{array} \right|.\] c表示向中对齐,l表示向左对齐,r表示向右对齐。 括号和分隔符 ()和[ ]和|对应于自己;{}对应于\{ \}; ||对应于\|。 当要显示大号的括号或分隔符时,要对应用\left和\right,如: \[ f(x,y,z) = 3y^2 z \left( 3 + \frac{7x+5}{1 + y^2} \right).\]对应于
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\left.
和\right.
只用与匹配,本身是不显示的,比如,要输出:]则用 \[ \left. \frac{du}{dx} \right_{x=0}. \]
希腊字母![]()
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