Introduction In recent times, through the contact with the massive data processing and search engine of many technologies, often see a lot of exquisite architecture diagram. In addition to every exclamation on the surface of each picture of the fine, more than the structure behind the hidden design ideas are amazed. Individuals these two days have been collecting the structure of the large web site design, one for feast, to understand the various type
Links: http://poj.org/problem?id=3164Test instructions: Tells N Point coordinates, m-bars indicate a path between two points, and a graph-minimum spanning tree is established from 1 o'clock onwards.Zhu Liu Algorithm template problemunder ========================== split line excerptSasuke_scutthe blog==================================================The smallest tree diagram, which specifies a special point root for a weighted graph, asks for a root-r
I. Introduction to UML Use case modeling
Use case modeling is part of UML modeling, and it is the most basic part of UML. The most important function of use case modeling is to express the functional requirements or behavior of the system. According to my understanding use case modeling can be divided into use case diagrams and use case descriptions. Use-case diagrams are composed of actors (actors), use cases (using case), system boundaries, and arrows, which are done by drawing. Use case descr
first, the basic concept
UML as a unified Modeling language, is a model of language, then the model is mainly used to represent, this time naturally generated UML diagram. UML mainly consists of basic building blocks, rules and public mechanisms, in which the basic building blocks consist of things, relationships and graphs. II. Basic Structure
Diagram is an important part of UML, then there are nine kinds
This is a creation in
Article, where the information may have evolved or changed.
First, the conclusion is listed in the front:
1.Golang performance can be very good, but some native package performance is likely to be retarded, such as RegExp and Encoding/json. If used in high performance requirements, we should optimize according to the actual situation.
The use of 2.ON-CPU/OFF-CPU flame diagram is a sharp weapon of program performance analysis, oft
The "activity diagram" displays business or software processes as workflows through a series of operations. These operations can be performed by people, software components, or computers.The activity diagram can be used to describe various types of processes. The specific examples are as follows:Business flow or workflow between the user and your system. For more information, see user requirement modeling.T
Test Case Design White paper-Causal diagram methodAuthor:vince Source: Http://blog.csdn.net/vincetest
I. Method Introduction 1. Definition: A method for designing test cases by using graphical analysis of various combinations of input, which is suitable for checking the various combinations of the input conditions of the program. 2. The background of causality diagram: Equivalence class partitioning method
Object-oriented dynamic modeling, four diagrams of behavior interaction between entities, State diagrams (Stage Diagram), Sequence diagrams (Sequence Diagram), activities (activity Diagram) in front of the blog, we have learned, Today we are going to study the collaboration diagram (Sequence
Defined
system boundaries determine the boundaries between the inside and outside of the system.
the protagonist represents the role played by the external object. An object can play several roles, so it can be represented by several protagonists.
communication relationships are used to illustrate the participation of protagonists in use cases.
A use case is a set of events that occurs when the protagonist completes a process through the system. Typically, a use case is a larger process, rath
Document directory
1) Call: the sender of the message sends the request to the receiver of the message, requesting the recipient object to perform some operation. Normally, this requires sending
2) asynchronous: In this message, the sender transfers the control to the receiver, but does not wait until the operation is completed.
I. Description of the sequence diagram
The sequence disequence describes the time sequence of messages transmitted betwe
UMLIncludes some graphical elements that can combine charts.
1. Class Diagram
A class (ClassIs a class or a group of things with similar attributes and common behaviors.
The rectangular box represents the icon of the class, which is divided3Regions. The top area is the class name, the middle area is the class attribute, and the column in the bottom area is the class operation.
For example, a washing machine ( Processing Machine Such as the b
UML Use case diagram Summary author: tianhai110 Published: 2012-01-30 15:33 read: 100,263 recommendations: 57 Original link [Favorites]Use case diagrams are primarily used to describe the relationship between users, requirements, and system functional units. It shows a model diagram of a system function that an external user can observe."Purpose": helps the development team to understand the functional requ
Online Design System for Ship Circuit Diagram Based on java web and. net activex plug-in and visio, activexvisio
1. Main objectives of the system: 1. Online circuit diagram design and circuit equipment selection; 2. online processing of Engineering Computing involved in circuit diagram design; 3. Visualize the data involved in circuit
one), "0 ..." (representing 0 or more), "0,1" (for 0 or one), "N...M" (for N to M), "m...*" (for at least m).• Association Relationship (association) is the most commonly used relationship between classes and classes, which is a structured relationship between a class of objects and another class of objects. • In UML class diagrams, objects that are associated with a solid line are connected by a class that, when implemented in a programming language such as Java, C #, and C + +, typically uses
The definition of a diagram
Graph is composed of a set of vertices with a poor non-empty set and an edge between vertices, usually expressed as: g (v,e), where G represents a graph, V is a set of vertices in graph G, and E is a set of edges in graph G.
A direction graph
There is to the edge: if from the vertex Vi to the edge of the Vj direction, it is called this side for the side, also become arc (ARC), with ordered even
Unordered
Interpretation of the object relationship diagram: A Brief E-R diagram refers to the three basic concepts of the object, relationship, attribute to summarize the basic structure of data, so as to describe the concept of static data structure. A E-R diagram is an entity-contact diagram that provides methods to represent
Many of the most common causes of software project failures are focused on poor communication or lack of communication between "project key stakeholders". When there is a lack of alliances between development agencies and business advocates, it is even more critical. Business people may know that they have a problem to solve, but the development leader receives only a general description of the business requirements and some specific requirements.In the UML modeling language, a "use case
The 16th Chapter Object diagramSometimes it is very useful to present the state of a system at a particular point in time. is similar to a snapshot of a running system. The UML object graph shows the objects, relationships, and property values acquired at a given moment.However, you should be wary of spending too much on the object graph. In most cases, they can be deduced directly from the corresponding class diagram and are therefore of little use.T
Fourth Chapter sequence diagramIn general, we will draw a sequence diagram of the relevant behavior of a plot, the graph will show the use case (using cases) may appear in some of the objects, as well as the transfer of information between objects. This chapter will be a simple plot to do all aspects of the sequence diagram of the relevant discussion. Suppose we now have an order and are ready to invoke one
The following is a Library management system state diagram, very typical, covering the use of all the elements of the state diagram, because the state diagram is relatively simple, directly from the view of the picture can be very well mastered. Suppose you want to understand the concept of the element rigor of the state diag
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