Checksum
A checksum or hash sum is a fixed-size datum computed from an arbitrary block of digital data for the purpose of detecting accidental errors that may have been introduced during its transmission or storage. The integrity of the data can be checked at any later time by recomputing the checksum and comparing it with the stored one. If the checksums match, the data was almost certainly not altered. Read more
人生没有过不去的坎，学会微笑面对，学会坚强承受(转载)
人生，没有永远的伤痛，再深的痛，在切之时，伤口总会痊愈。
人生，没有过不去的坎，你不可以坐在坎边等它消失，你只能想办法穿过它。
人生，没有永远的爱情，没有结局的感情，总要结束；不能拥有的人，总会忘记。
我们，就是在一次又一次的打击中长大，弱者在打击中颓废，强者在打击中深刻坚强。还是要学杨柳，看似柔弱却坚韧，狂风吹不断；太刚强的树干，风中折枝。
学会放弃，学会承受，学会坚强，学会微笑，那是一种别样的美丽！适当的放弃，是人生优雅的转身。 Read more
Intel HEX
Intel HEX is a file format for conveying binary information for applications like programming microcontrollers, EPROMs, and other kinds of chips. It is one of the oldest file formats available for this purpose, having been in use since the 1970s. Read more
Inspire by AWESOME: Anything you want it to be
Wow! This has been an experience far beyond words. I can’t even begin to express sincere thank yous to each and every one of you for surfing the AWESOME wave with me over the past four years. Read more
Diverterless supersonic inlet
A diverterless supersonic inlet (DSI) is a type of jet engine air intake used by some modern combat aircraft to control air flow into their engines. It consists of a “bump” and a forward-swept inlet cowl, which work together to divert boundary layer airflow away from the aircraft’s engine while compressing the air to slow it down from supersonic speed. The DSI can be used to replace conventional methods of controlling supersonic and boundary layer airflow, such as the intake ramp and inlet cone, which are more complex, heavy and expensive. Read more
On May 11, 2012 there were 1287 potentially hazardous asteroids.
 |
| Asteroid |
Date(UT)
|
Miss Distance
|
Mag.
|
Size
|
| 1992 JD |
May 2
|
9.5 LD
|
–
|
43 m
|
| 2012 HA34 |
May 2
|
2.9 LD
|
–
|
38 m
|
| 2010 KK37 |
May 19
|
2.3 LD
|
–
|
31 m
|
| 4183 Cuno |
May 20
|
47.4 LD
|
–
|
5.7 km
|
| 2002 VX94 |
May 26
|
72.8 LD
|
–
|
1.1 km
|
| 2002 AC |
Jun 16
|
62.2 LD
|
–
|
1.2 km
|
| 1999 BJ8 |
Jun 16
|
68.8 LD
|
–
|
1.1 km
|
| 2005 GO21 |
Jun 21
|
17.1 LD
|
–
|
2.2 km
|
| 2003 KU2 |
Jul 15
|
40.3 LD
|
–
|
1.3 km
|
| 2004 EW9 |
Jul 16
|
46.8 LD
|
–
|
2.1 km
|
| 2002 AM31 |
Jul 22
|
13.7 LD
|
–
|
1.0 km
|
|
Notes: LD means “Lunar Distance.” 1 LD = 384,401 km, the distance between Earth and the Moon. 1 LD also equals 0.00256 AU. MAG is the visual magnitude of the asteroid on the date of closest approach.
