Void timer0_isr (void) interrupt 1 using 1{Static unsigned char I; // returns the value of 12 m for Crystal Oscillator computation. The instruction period is 1 US, 500x2 = 1 ms square wave.Th0 = (65536-500)/256;Tl0 = (65536-500) % 256;I ++;P0 = I; // The P0 port outputs 8 different frequencies, which is equivalent to a divider and is frequently used as an indication wave.// Device measurement, which can be directly observed by led at low frequency// P0.0 outputs 1 ms square wave, p0.1 outputs 2
January 26
Question list
Source
Knowledge points
Completion Time
A 1275 Abacus Test
Noip popularity group 2014
Violent ???
2018.11.2
B
C 1277 spiral Matrix
Thinking ???
2018.11.2
D
E
F 1208 expression evaluation (after-game question completion)
Violent ???
2018.11.2
I borrowed someone else and haven't written any logs for a few days,
Written here,
On Saturday, we wanted a big man to be "romantic" and went to dongkeng to eat fish ~~~~).
At noon, I got out of the bus to do something. Then I planned to walk to another stop card. I turned around and fainted. After searching for a long time, I found the target car,
It seems that it is "slow" and there is no "wave" yet ":)
When it comes to the ground, it may be around a little bit. The fish only has a small
the target system runs slowly. In severe cases, network congestion or even system paralysis occurs.
SYN attacks are typical.DDoS Attack. It is very convenient to detect SYN attacks. When you see a large number of semi-connection statuses on the server, especially when the source IP address is random, it can basically be determined that this is a SYN attack. in Linux, you can run the following command to detect SYN Attacks:
Netstat-n-ptcp | grep syn_recv
Generally, the new TCP/IP protocol stack
In the economic stability but lack of growth momentum of the situation, each industry is a surprise, want to in the post-crisis era to create a better future for themselves, so as to keep pace with the times to maintain steady growth. In the face of such an economic environment, the domain name industry has also been frequent moves, set off a wave of waves, cn price of the wave just calm, COM domain name and new trends.
Recently, the author in the e
confirmation, the client is aware that the connection is not requested. release of TCP connections (four waves)
After the data transfer is complete, both sides can release the connection. At the very beginning, both the client and the server are in a established state, and then the client shuts down actively and the server shuts down passively. The client process issues a connection release message and stops sending data. Releases the header of the
URL Access website (three handshake, four waves)
1) to obtain the corresponding IP address of the domain name, if there is no relevant data in the DNS cache, IE will issue a DNS request to the DNS server to obtain the corresponding IP address of the domain name.
2) Internet Explorer and domain name address to establish a TCP connection, three times handshake
3) HTTP access
4) Disconnect the TCP connection and wave four times
Four scen
The tutorial's reflection making method is very classical, mainly uses in the filter the glass filter. When setting parameters, add some texture material, you can quickly make water wave effect. Very practical.OriginalFinal effect1, open the
First on the material and effect
Material
Effect
Open the footage first and copy it.
Use your usual method to remove the dynamic water ripple in the picture, and I'll rub it with the skin.
Then
To the users of the painter software to explain the detailed analysis of the painting in the night of the wave effect of the tutorial.
Tutorial Sharing:
Painting software: Painter 6
Hardware: Is the shadow Extension 2
In addition to color palette, this tutorial incorporates a lot of decorative elements. The screen effect is very spectacular, especially in the later color adjustment is very visual impact.
In addition to color palette, this tutorial incorporates a
Chapter 2 ecological chain of Computer IndustryMoore's LawIntel founder Gordon Moore 1965Integrated circuit integration doubles every 18 monthsPromotion: the price of the same IT product is reduced by half in 18 monthsIt's not a strict 18-month
Trojan horses often go into your system when you don't notice, and this article introduces some of the places where they often hide. After reading this article, that you are not a master you can easily clear the system in the Trojan horse program.
1,
First look at the two-pair state diagram of TCP connection and disconnect, as follows:From the diagram known that the client received the service end of the request disconnect with the FIN bit end message segment, and send Ack confirmed, it did not
TCP is the host to the host Layer Transmission Control Protocol, providing a reliable connection service, using three times handshake confirmation to establish a connection.
(1) Bit code is the TCP flag bit:There are 6 kinds of signs: SYN
TCP is the host to the host Layer Transmission Control Protocol, providing a reliable connection service, with three handshake confirmation to establish a connection:
Bit code is the TCP flag bit, there are 6 kinds of indicators: SYN (Synchronous
To the users of the painter software to explain the detailed analysis of the painting in the night of the wave effect of the tutorial.
Tutorial Sharing:
Continue to paint, continue to add details (this detail is not to the
It takes three handshake to establish TCP and four handshake to disconnect. The entire process is shown in the following illustration:
The process of establishing a connection:A TCP connection is initialized with a three-time handshake. The
It is also strange that some websites look bad, not to mention what user experience does not need to say what original articles, on a very ordinary site can even say that from the same person first, but why the fate of the site is different, in the
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