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曾是少年

Ubuntu1604连接蓝牙鼠标

实验

打开命令行
$ sudo -i

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[bluetooth]# power off
[bluetooth]# power on
[bluetooth]# scan on
[bluetooth]# connect XX:XX:XX:XX:XX:XX
[Arc Touch Mouse SE]# trust
[Arc Touch Mouse SE]# pair
[Arc Touch Mouse SE]# unblock
[Arc Touch Mouse SE]# power off
[bluetooth]# power on

注意先从系统设置的蓝牙里，把之前配对的设备删掉，我还把 /var/lib/bluetooth/…./XX:XX:XX:XX:XX 的老的配对文件也给删了。
重新配对后，info 文件里的内容比1楼里的内容多了 ConnectionParameters、IdentityResolvingKey、LocalSignatureKey、LongTermKey 等好几段数据

使用evo工具评测SLAM

实验

evo是一款用于视觉里程计和slam问题的轨迹评估工具。核心功能是能够绘制相机的轨迹，或评估估计轨迹与真值的误差。支持多种数据集的轨迹格式（TUM、KITTI、EuRoC MAV、ROS的bag），同时支持这些数据格式之间进行相互转换。在此仅对其基本功能做简要介绍。并且介绍如何修改经典的SLAM算法以输出可使用evo评测的轨迹。

github地址

阅读更多...

Markdown语法简介

工具

分段与分行

以一个或多个空行来隔开段落；以两个或多个空格来段内换行。

标题

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This is an H1
=============

This is an H2
-------------

# This is an H1

##  This is an H2

######  This is an H6

引用

在每一行前面写一个>：

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> This is a blockquote with two paragraphs. Lorem ipsum dolor sit amet,
> consectetuer adipiscing elit. Aliquam hendrerit mi posuere lectus.
> Vestibulum enim wisi, viverra nec, fringilla in, laoreet vitae, risus.
>
> Donec sit amet nisl. Aliquam semper ipsum sit amet velit. Suspendisse
> id sem consectetuer libero luctus adipiscing.

效果：

This is a blockquote with two paragraphs. Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aliquam hendrerit mi posuere lectus. Vestibulum enim wisi, viverra nec, fringilla in, laoreet vitae, risus.

Donec sit amet nisl. Aliquam semper ipsum sit amet velit. Suspendisse id sem consectetuer libero luctus adipiscing.

或者在每一段前面写一个>：

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> This is a blockquote with two paragraphs. Lorem ipsum dolor sit amet,
consectetuer adipiscing elit. Aliquam hendrerit mi posuere lectus.
Vestibulum enim wisi, viverra nec, fringilla in, laoreet vitae, risus.

> Donec sit amet nisl. Aliquam semper ipsum sit amet velit. Suspendisse
id sem consectetuer libero luctus adipiscing.

多重引用

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> This is the first level of quoting.
>
> > This is nested blockquote.
>
> Back to the first level.

效果：

This is the first level of quoting.

This is nested blockquote.

Back to the first level.

列表

列表项占一行，以*、+、-开头即可：

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*   Red
*   Green
*   Blue

效果：

  • Red
  • Green
  • Blue

有序列表只需要将上述标记符换成数字加句点。而且顺序由书写顺序决定，与数字无关，但数字需要从1开始。例如：

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1\.  Bird
3.  McHale
2.  Parish

效果：

  1. Bird
  2. McHale
  3. Parish

每一个列表项可以多行：

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*   Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
Aliquam hendrerit mi posuere lectus. Vestibulum enim wisi,
viverra nec, fringilla in, laoreet vitae, risus.
*   Donec sit amet nisl. Aliquam semper ipsum sit amet velit.
Suspendisse id sem consectetuer libero luctus adipiscing.

效果：

  • Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aliquam hendrerit mi posuere lectus. Vestibulum enim wisi, viverra nec, fringilla in, laoreet vitae, risus.
  • Donec sit amet nisl. Aliquam semper ipsum sit amet velit. Suspendisse id sem consectetuer libero luctus adipiscing.

代码块

每一行前面缩进四个或以上个空格，就认为是开始了一段代码块。代码块内原样输出。

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This is a normal paragraph:

    This is a code block.

效果：

This is a normal paragraph:

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This is a code block.

横线

三个或更多个*、-（它们之间可以有空格）会产生横线：

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* * *

效果：

链接

内嵌链接：

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I get 10 times more traffic from [Google](http://google.com/ "Google")
than from [Yahoo](http://search.yahoo.com/ "Yahoo Search") or
[MSN](http://search.msn.com/ "MSN Search").

或参考文献式链接（缺省的链接标记认为与文本一致）：

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I get 10 times more traffic from [Google] [1] than from
[Yahoo] [2] or [MSN] [3].

  [1]: http://google.com/        "Google"
  [2]: http://search.yahoo.com/  "Yahoo Search"
  [3]: http://search.msn.com/    "MSN Search"

I get 10 times more traffic from [Google][] than from
[Yahoo][] or [MSN][].

  [google]: http://google.com/        "Google"
  [yahoo]:  http://search.yahoo.com/  "Yahoo Search"
  [msn]:    http://search.msn.com/    "MSN Search"

效果：

I get 10 times more traffic from Google than from Yahoo or MSN.

如果直接以链接地址作为链接文本，可以用如下快捷写法：

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<http://www.shengbin.me> 效果：

http://www.shengbin.me

强调

单个*或_产生斜体，两个（**、__）则产生粗体。例如：

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*like* _this_

**like** **this**

效果：

like this

like this

内嵌代码

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code: `echo hello`

效果：

code: echo hello

图片

图片与链接类似，只需在文本前面加上感叹号!即可。图片位置和大小无法通过Markdown来指定。

转义字符

以下特殊字符需要用\转义得到。

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\   backslash
`   backtick
*   asterisk
_   underscore
{}  curly braces
[]  square brackets
()  parentheses
#   hash mark
+   plus sign
-   minus sign (hyphen)
.   dot
!   exclamation mark
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