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Hdustm4 Fermat point in quadrangle

: Give me a quadrilateral and ask me the minimum distance between a point and four points in the Quadrilateral. Analysis: if it is a convex quadrilateral, The Fermat point is the intersection of the diagonal line, and the distance is the diagonal line length. This is a good proof .. If it is a concave polygon, The Fermat point is the concave point, see the figure: First, the distance between any point on the CD must be greater than that of the D point. Then, for any vertex E, its distance is

Game IP Packets

package, when a game allows watching, the server must know the coordinates of the NPC and broadcast them to other gamers. In the next 4th packages, "Send->0000 F4 44 10 da 01 dB 6C 79 F6 05 02 27 35 01 00 00 ", we see" 6C 79 F605 ", initially concluded that the store's code is it!(This analysis involves a lot of work. You can use WPE to cut data and analyze it yourself)The analysis of the first package is now here (we do not need to be completely clear about the information contained)Let's take

Raspberry Pi Build Dialogue robot Python

"]def yuyinshibie_api (Audio_data,token):Speech_data = Base64.b64encode (audio_data). Decode ("Utf-8")Speech_length = Len (audio_data)Post_data = {"Format": "WAV","Rate": 16000,"Channel": 1,"CUiD": "b8-27-eb-ba-24-14","Token": token,"Speech": Speech_data,"Len": Speech_length}url = "http://vop.baidu.com/server_api"json_data = json.dumps(post_data).encode("utf-8")json_length = len(json_data)#print(json_data)req = urllib2.Request(url, data=json_data)req.

Java Web-Servlet (1) Required knowledge

(including both local and internet). URI defined by a scenario that contains a deterministic syntax and related protocols. Resources: HTML documents, images, video clips, programs, etc. . W EB Applications: W an EB application is a collection of Web resources that can be understood as a folder on a hard disk. This folder is used to manage multiple Web resources, often referred to as Web applications, or

Vim (Linux editor) simple configuration and common commands

A simple configuration1 Add configuration file. vimrcUnder directory/etc/, there is a file named VIMRC, which is a public vim configuration file in the system and is valid for all users. and in each userHome directory, you can create a private configuration file named: ". VIMRC".The following is an example of an ordinary user:set up in the user's home directory . vimrc fileor directly download the master to write a good move to their home directory can beDownload Vimrc.zip, unzip the file as. VI

Linux VSFTP Configuration

= "Wkiom1g-u-mgupffaabt0r1elt8203.png"/>Configure VSFTPD to use the profile directory for virtual usersVim/etc/vsftpd/vsftpd.confAdd an item to the insideUser_config_dir=/etc/vsftpd/vusers_configCreate the required directory and provide the configuration file for the virtual usermkdir/etc/vsftpd/vusers_config/cd/etc/vsftpd/vusers_config/Touch LAN DRRThen add some content to the LAN DRR file as650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/8A/EB

Format of reference documents

Document annotation Format Reference types: Monographs [M], Selected papers [C], newspaper articles [N], journal articles [J], dissertations [D], reports [R], Standard [S], patent [P], paper concentration of the precipitation document [A] Electronic Document Type: Database [DB], Computer [CP], electronic bulletin [EB] Type of carrier of electronic literature: Internet [OL], CD-ROM [CD], tape [MT], disk [DK]   A: Monographs, Essays, dissertations,

Privacy Registry "secret" but not to declare _ registry

the key value you find is " 74D80E ", we put it two bytes in a group, one point. This results in three sets of "D8 0e", and then the three sets of characters are found in the table below to find the corresponding characters. A =74 =db =0c =e7 =12 =e8 =95 =2b B =77 =d8 =0f =e4 =11 =eb = 96 =28 C =76 =d9 =0e =e5 =10 =ea = 97 =29 D =71 =de =09 =e2 =17 =ed =90 =2e E =70 =df =08 =e3 =16 =ec =91 =2f F =73 =dc =0b =e0 =15 =ef =92 =2c G =72 =dd =0a =e1 =14 =

Silverlight user code not processed TypeLoadException

When an enum is dynamically created in Silverlight, multiple calls to the change method appear with the error shown, and the definition name is later found to be the same.Declare the global variables in the program to distinguish them.int num = 1;Private Type Createenum (list{AppDomain app = Appdomain.currentdomain;AssemblyName aName = new AssemblyName ("Silverlightenum" + num);AssemblyBuilder ab = App. DefineDynamicAssembly (AName, Assemblybuilderaccess.run);ModuleBuilder MB = ab. DefineDynamic

[Java] SSH Frame Note _s.s.h Framework respective pros and cons

cannot be mapped to more than one table).Let me make a list of the frame structures I have listed n times:The traditional architecture:1) Session bean To address the alternative architecture of performance barriers:2) Session Bean A schema that uses Hibernate to improve the development efficiency of the above architecture:3) Session Bean The above 3 architectures are analyzed:1. Memory consumption: The JDBC Architecture 2 is undoubtedly the most memory-saving, hibernate architecture is the seco

JavaScript reads binary file and uses Ajax to transmit binary stream method _javascript tips

'] = ' 2580 '; forward[' E0 '] = ' 03b1 '; forward[' E1 ' = ' 00DF '; forward[' E2 '] = ' 0393 '; forward[' E3 '] = ' 03c0 '; forward[' E4 '] = ' 03a3 '; forward[' E5 '] = ' 03c3 '; forward[' E6 '] = ' 00b5 '; forward[' E7 '] = ' 03c4 '; forward[' E8 '] = ' 03a6 ';forward[' E9 '] = ' 0398 '; forward[' EA '] = ' 03a9 '; forward[' EB '] = ' 03b4 '; forward[' EC ' = ' 221E '; forward[' ED '] = ' 03c6 '; forward[' EE '] = ' 03b5 '; forward[' EF ' = ' 222

Uboot MMC command detailed &nand Flash uboot command detailed

1f C0 E3 D3 E3 (F0) ............ 8c E5 FC 4d eb 9f e5 F0 3c 0d eb F4 9f e5 e5 () EB 0d A0 E1 E5-A0 E3OOB: FF FF-FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF-FF FF FF FF FF FF FF FF-FF FF FF FF FF FF A6 AB 3c CF 5a A7 CF F0 A6 3f 0c C3 C3 cc F3 NAND write-addr off size This command is the same as NAND re

Inline assembly language in GCC

contents of a register to a memory variable, as specified by the output qualifier. If the qualifier for the output operand is specified as a memory variable ("M"), the step is omitted. This is the interpretation of the content after the first colon, such as: ASM ("mov%0,%1": "=m" (foo), "= A "(bar):), compiled as: #APP MOVL Foo,eax #NO_APP MOVL Eax,bar The statement is a bit weird, but it's a good representation of how GCC works. Take a piece of code in ARCH/I386/KERNEL/APM.C as an example, l

B-KB GB MB. Transformation

The following are common conversions: 1 byte (b) = 8 bits (b) byte = 8 bits 1 KB = 1024x768 B (KB-KILOBAJT) thousand 1 MB = 1 GB (mb-megabajt) MB = 1024x768 (GB-GIGABAJT)1 TB = 1024x768 (TB-TERABAJT) too1 PB = 1024x768 TB (PB-PETABAJT) Pat1 EB = 1024x768 PB (EB-EKSABAJT) AI1 ZB = ZB-ZETTABAJT (EB)1 YB = 1024x768 ZB (YB-JOTTABAJT) Woo 1 BB = 1024x768 JB (BB-BR

Pattern Recognition: Design and implementation of simulated annealing algorithm

loop termination criterion and outer loop termination criterion should be followed. The design of these links will determine the optimal performance of the simulated annealing algorithm.Third, the experimental resultsFour, simple code implementation%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% random simulated annealing function% input parameter:%T_max: Initial temperature% Time_max: Maximum number of iterations% c: Temperature drop ratio% s: Initial configuration% w: Weight matrix% output

Alictf linux exploit Solution

% ebp, % rdi //??? Cb: be d0 00 00 00 mov $0xd0, % esi d0: e8 00 00 00 00 callq d5 new_kbof_test + 0x2c> memset (rdi = (length of the second input parameter ), esi = 0xd0) memory allocation 0xd0 d5: 48 85 c0 test % rax, % rax d8: 48 89 c3 mov % rax, % rbx // return value of kmalloc. If rdi is successful, if the call fails, NULL is returned .. db: 74 14 je f1 new_kbof_test + 0x48> dd: 89 ea mov % ebp, % edx df: 4c 89 e6 mov % r12, % rsi e2: 48 89 c7 mov % rax, % rdi e5: e8 00 00 00 00 callq ea n

Php byte Conversion Function-PHP source code

The Byte conversion function is used to convert kb to mb, gb, tg, eb, pb and other units. This function is very useful for file uploading. We will share with you a function below. The Byte conversion function is used to convert kb to mb, gb, tg, eb, pb and other units. This function is very useful for file uploading. We will share with you a function below. Script ec (2); script The Code is as f

DLL with Ollydbg for UPX shelling

: 003B825E of [edi], run F9, and disconnect Code :--------------------------------------------------------------------------------003B825E 8A07 mov al, byte ptr ds: [edi]// EDI = 003B7318-current base address 003B0000 = 00007318★This is the RVA of the relocation table.003B8260 47 inc edi003B8261 09C0 or eax, eax003B8263 74 22 je short EdrLib.003B8287// Jump after data processing is relocated003B8265 3C EF cmp al, 0EF003B8267 77 11 ja short EdrLib.003B827A003B8269 01C3 add ebx, eax003B826B 8B03 m

C Programming unban Software Installation Wizard

, byte ptr [edx]00430959 |. 42 inc edx001000095a |. EB 14 jmp short 0043097000000095c |> 33F6 xor esi, esi0036695e |. EB 10 jmp short 00430970; below is the key computing00430960 |> 0FBEC0/movsx eax, al00430963 |. 03C9 | add ecx, ecx00430965 |. 8D0C89 | lea ecx, dword ptr [ecx + ecx * 4]00430968 |. 03C8 | add ecx, eax00000096a |. 8A02 | mov al, byte ptr [edx]001000096c |. 83C1 D0 | add ecx,-300036696f |. 42

The iptables firewall only allows an IP address to access a port and a specific website.

-d $ INTERNET_ADDR-j DNAT -- to-destination 192.168.100.200: 110 iptables-t nat-a prerouting-p tcp -- dport 25-d $ INTERNET_ADDR-j DNAT -- to-destination 192.168.100.200: 25 only PING 202 is allowed. 96. 134. 133, other services disable iptables-A Filter-p icmp-s 192.168.100.200-d 202.96.134.20.- j ACCEPTiptables-A Filter-j DROP disable BT configuration iptables-A Filter-p tcp-dport 6000: 20000-j DROP disable QQ firewall configuration iptables-A Filter-p udp -- dport! 53-j DROPiptables-A Filter-

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