/* Java Script for online ellipse arc length Calculator
Author: Joe Bartok
Date: 10000l/2004 *
URL: http://www.oocities.org/web_sketches/ellipse_notes/ellipse_arc_length/ellipse_arc_length.html
Arc Length of Ellipse
Scope: First quadrant, 0 Semi-axis lying on the X-axis, r =?
Semi-axis lying on the Y-axis, r =?
(X1> x2)... X1 =? X2 =? (? Is the input value)
------------ Onclick = "solve_arc_length ()"------------------
/
Function solve_arc_length (){VaR Pi = math. PiVaR rad = PI/180.VaR f= 1000
(1) RingVertices = D1: 72 D2: 72u = from 0 to (2 * PI) d1v = from 0 to (2 * PI) D2 r = 3 * Cos (u) + 7 z = 3 * sin (u) y = r * sin (v) x = r * Cos (v) y = Y + 5
(2) random radius Ring
Two methods are provided:
vertices = D1:72 D2:72u = from 0 to (2*PI) D1v = from 0 to (2*PI) D2a = 10.0b = rand2(0.5, a)x = (a + b*cos(v))*sin(u)y = b*sin(v)z = (a + b*
ATM. Therefore, for telecom networks, ATM is ideal as a multi-service platform for a period of time. Even in the foreseeable future, at the edge of the network, ATM is still indispensable as a business collection point. For this reason, many ATM manufacturers are still trying to improve the performance and capacity of the ATM switch, so that it has a place in the next generation telecommunications network.
There are two ways to combine ATM and IP. The first is overlap between the two. Although
interconnection problem between manufacturers is solved, the softswitch classification or full-plane routing mode can be gradually introduced.
2.2 Traffic Network Design
Due to the adoption of the Fast IP forwarding technology, the soft-switch route organization is flat and connectionless. QoS and security should be considered in the design of the traffic network. Currently, the IP bearer network is mainly implemented using mpls vpn technology. To ac
.
Introduce MPLS to the access layer
With the advancement of FTTx, on the one hand, the traditional leased line service is also faced with the dilemma of the ATM switch return. A large number of leased line services need to be accessed with high quality and quality. If a single access is built to carry this service, it will bring a huge burden to operators. On the other hand, the traditional DSLAM mode service configuration mainly uses VLAN configurat
interconnection problem between manufacturers is solved, the softswitch classification or full-plane routing mode can be gradually introduced.
2.2 Traffic Network Design
Due to the adoption of the Fast IP forwarding technology, the soft-switch route organization is flat and connectionless. QoS and security should be considered in the design of the traffic network. Currently, the IP bearer network is mainly implemented using mpls vpn technology. To ac
, y), where X is multiplied by, Y to B,
The matrix is: Verify according to the method similar to the previous "Translation.
The image rotation is slightly complicated: The corresponding point after the θ angle is rotated by P0 (x0, y0) is p (x, y ). By using vectors, we can get the following:
X0 = r cos αY0 = r sin α
X = r cos (α + θ) = x0 cos θ-y0 sin θY = r sin
structure. It collects information about packet queues on each input port in each scheduling time slot, A match is obtained between the input port and the output port through a certain scheduling algorithm, providing a path from the input port to the output port. Crossbar with no blocking input buffer and ESLIP Algorithm for scheduling have been adopted by some manufacturers. The difficulty of the scheduler design is that it must not only meet the system throughput requirements of 100%, but als
, the corresponding device is an authorized IP phone number, the router can also trust the communication priority mark provided by the phone. In this way, you can protect the network to prevent improper use. Endpoint verification can determine which data packet gets a high priority and determine which data packet gets the best effort to support it.
Before your data packets pass, we recommend that you develop a plan to determine which service level will be used for communication, how many service
At present, the development of Ethernet switches is very rapid. Here we analyze the development status of Ethernet switches. MPLS switches follow the trend of combining ATM and IP addresses. Multiprotocol Label Switching (MPLS) is a tag exchange technique between Layer 2 and Layer 3. It is specially designed for IP addresses, the high-speed switching capability of the second layer can be combined with the f
Ethernet switches are still commonly used. So I studied the market development and future directions of Ethernet switches. I would like to share with you here, hoping to help you. MPLS switches follow the trend of combining ATM and IP addresses. Multiprotocol Label Switching (MPLS) is a tag exchange technique between Layer 2 and Layer 3. It is specially designed for IP addresses, the high-speed switching ca
This section will show you how to generate a ring and various ring-related graphs, including cyclide surface, Horn torus, and tore de Klein.
For related software, see: Mathematical graphics visualization tool. Use script code with custom syntax to generate mathematical graphics.
I have previously written a C ++ program for generating a ring. The code is published on the Generation Algorithm of the ring graph.
(1) Ring
vertices = D1:72 D2:72u = from 0 to (2*PI) D1v = from 0 to (2*PI) D2r = 3*
, y0) to pan and move it to p (x, y), where X is multiplied by, Y to B,
The matrix is: Verify according to the method similar to the previous "Translation.
The image rotation is slightly complicated: The corresponding point after the θ angle is rotated by P0 (x0, y0) is p (x, y ). By using vectors, we can get the following:
X0 = r cos αY0 = r sin α
X = r cos (α + θ) = x0
matrix is: The verification is based on a method similar to the preceding "panning".
The rotation of the image is slightly more complex: the corresponding point after the P0 (x0, y0) rotation theta angle is P (x, y). By using vectors, we get the following:x0 = R Cosα Y0 = r sinex = R cos (α+θ) = x0 cosθ-y0 sinθ y = r sin (α+θ) = x0 sinθ+ y0 cosθ
So we get the matrix:
What if the image rotates around a point (a, b)? Then you have to translate the c
), where x is multiplied by, y to B,
The matrix is: Verify according to the method similar to the previous "Translation.
The image rotation is slightly complicated: The corresponding point after the θ angle is rotated by P0 (x0, y0) is P (x, y ). By using vectors, we can get the following:X0 = r cos αY0 = r sin αX = r cos (α + θ) = x0 cos θ-y0 sin θY = r sin (α +
formula, we can see that C and F control the offset of X and Y respectively. A and E control X, and y coordinate multiples, soX to A, y to B,The matrix is :,The translation in the X direction is △x, and the translation in the Y direction is △y. Then, the coordinates of P (x, y) are:X = x0 + △xY = y0 + △yThe matrix expression is as follows:Moving first and then putting it big, the multiplication of the matrix is like a * B.The image rotation is slightly complicated: The corresponding point after
In the previous compilation of MPLS into the Linux kernel, it is now necessary to install Iprouter, the installation process is as follows:1) Download two files of iproute2-2.6.39.tar.gz and Iproute2-v2.6.39-mpls.patch.Iproute2-2.6.39.tar.gz:http://pkgs.fedoraproject.org/repo/pkgs/iproute/iproute2-2.6.39.tar.gz/8a3b6bc77c2ecf752284aa4a6fc630a6/ Iproute2-2.6.39.tar.gzIproute2-v2.6.39-mpls.patch:Http://ftp.jaist.ac.jp/pub/sourceforge/m/project/mp/
1 Introduction
With the rapid development of Internet and optical fiber technology, the integration of IP and Optical network technology will become an important trend of network development in the future. How to solve the integration of IP layer and optical layer, GMPLS provides a good idea. Gmpls inherits almost all MPLS features and protocols, and is an extension of MPLS to optical network, it can use u
Multi-Protocol label switching (MPLS)
In traditional 3-tier forwarding, each router extracts forwarding information from a 3-tier file header as packets are transmitted over the network. This file header analysis is repeated for each router that the packet passes through.
In MPLS networks, packets are forwarded according to the label. Each IP network that can be reached through an interface is assigned a
forwarding for different queues based on predefined or user-specified priorities.Routers usually use RED Early Detection and WRED weighted early detection in the queue to avoid congestion.MPLS Technology As an efficient IP backbone network technology platform, MPLS technology provides a flexible and scalable backbone network exchange technology for the next generation of IP networks. Using MPLS technology
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