Diagrams consist of data elements and lines that connect data elements. In the figure, the data element is called the vertex (Vertex), and the line connecting the vertices is called the Edge (Edge). A graph is made up of vertex sets and edge sets. Generally recorded as form: g= (v,e), or g= (V (g), E (g)).1. Forward and no-show graphsNo map: Edges have no direction. Example (V1,V2), also can be written as (V2,V1).Directed graph: Side has direction, example 2. Adjacency PointThe two vertices of a
diagram).Used to define the physical architecture of the hardware in the system to describe the actual physical device and the connection between them.7, Sequence diagram (sequence diagram).Describes the order of interactions between objects, focusing on the chronological order of message delivery between objects, emphasizing the order in which messages are sent between objects, and also showing the interaction between objects.8, collaboration diagram.A collaboration diagram is an interaction
-transforms.htmSummaryMatrix operation is a very basic mathematical knowledge, in the graphics of the application is still very extensive, but the University of the time often do not know what to use, and now use the time but forgot what the principle. This article only introduces some basic concepts of matrix operations, the detailed content can refer to the following reference. The next article simply introduces the actual use of matrix transformations.Resources:
HTTP://MSDN.MICROSOFT
effect);The effect is this (intercept the upper part)Such a large picture, must be cut. When the "first general, then local", that is, the large layout or module to determine down, and then to the specific module inside to subdivide. Like, I'm going to break this big picture into three parts.2. Save:Jpgorpng?Save the time remember not to choose "Save", but choose "store the format required for the Web", and then go to set the picture parameters and format of the window, you can set the picture
images/icons/;(2) It creates a class for each file name in its icon directory;(3) It adds a background image for all icons ;(4) It adds a background position for all icons .By default, Compass does not set the width and height of these elements. Compass can automatically generate the size of the icon , but we don't always need it3-1, single-sprites mixerThis icon will output the CSS for a single icon@import "Compass/utilities/sprites"; @import "Icons/*.png";. Add-button {@include icons-sprite (
proxy. The forwarding Proxy server can also use caching to mitigate the original server load and provide a response speed.Reverse proxy ServerReverse proxy server Instead, it looks like a normal Web server to the client. The client does not make any special configuration. The client sends a normal request to get the contents of the space that the reverse proxy belongs to. The reverse proxy determines where to send these requests, and then returns the requested content as if it were the original
Title Analysis: In an undirected graph, some points are painted black, so that when you delete any of the points in the graph, each connected component has at least one black point. At least a few black spots can be applied, and there are several options in case of minimum coating.Problem Analysis: Obviously, must not be cut point. For each connected component, if there are 1 cut points, it must be applied to any point in the component except the cut point, if there are multiple (2 or more) cut
time release.
Make a histogram: Select the frequency number to insert the bar chart
Trim Column chart: Set data series format-modulation no spacing
second, make the normal distribution diagram
Get normal distribution concept density: normdist (function: Normal distribution function that returns the specified mean and standard deviation)
Grammar:Normdist (x,mean,standard_dev,cumulative)X is the value for which the distribution is to be computed; ( with each groupi
adjacency MatrixAn adjacency matrix is a representation of a graph Common storage representations. It uses two arrays to store information about the data element (vertex) and the relationship between the data elements (edges or arcs), respectively. The adjacency matrix A of graph G with order n is n*n. Label the vertex of G as v_1,v_2,..., v_n. if (V_i,v_j) \in E (G), a_{ij}=1, otherwise a_{ij}=0.Depth-first-searchIs to traverse the tree's nodes, as deep as possible, to search the branches of t
High school time to do, the first two days to see, quite fun./***0-360 cosine function Image ***/#includeAfter running650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/6C/21/wKiom1VAeUHCdbJpAAECbUHgYSo335.jpg "title=" 1.jpg " alt= "Wkiom1vaeuhcdbjpaaecbuhgyso335.jpg"/>This article is from the "hacker" blog, make sure to keep this source http://anglecode.blog.51cto.com/5628271/1640305The chord function cos of interesting graphs
High school time to do, the first two days to see, quite fun.Just want to say, the original code style,,, cough, not the coquettish!#include After running650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6C/1D/wKioL1VAfdHCUBV_AAEMJfxncX8650.jpg "title=" 1.jpg " alt= "Wkiol1vafdhcubv_aaemjfxncx8650.jpg"/>Another way--compare the numbers in the code (mainly for deeper understanding)#include After running650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6C/1D/wKioL1VAfo-zlATOAAETi
Linkpath on the network:Network.setlinkpathfunction (Createlinkpath);The direction of the connection we used the first level after the vertical way, you can also add a horizontal offset value, so that we can control the inflection point of the connection.Double-click Expand, Merge AnimationsThe most important feature of this flowchart is the ability to merge and expand sub-processes, and to specify which points to pick up when merging, with the following effects:So the flowchart will be much cl
Concurrency is a lot of things to handle (deal with), and parallelism is the numberof things that can be done (do) at a time. To give a simple example, Hua Hua, must have to boil water, wash cups, take tea and other steps. Now we want to finish this as soon as possible, that is, "to deal with a lot of things", there are many ways to achieve concurrency, such as to ask more people to do at the same time, which is parallel. Parallelism is a way to implement concurrency, but not the only way. We ca
. Next, when we upload the post-editing, we also want to display the newly uploaded image, then we need to modifyfunction Cat_list (functions in the/includes/lib_common.php)Append a category_img field when constructing a $sql variable near line 250$sql = "Select c.cat_id, C.cat_name, C.measure_unit, c.parent_id, C.is_show, C.show_in_nav, C.grade, C.sort_order, COUNT ( s.cat_id) as Has_children,c.category_img ".5. Don't forget to add a varchar-type category_img field to the Xxx_category table to
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