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The input signal of the access control system includes: Landing Lever position sensor: Two position value signal (up/down) Car entry sensor: Two values (True/false) Car Gate sensor: Two values (True/false) The output signal of the access control system includes: Motor control signal for landing lever: (Up/down) Traffic light signal: (Red/green) The passing process of a car is: The landing lever is in the falling state and the traffic light is red.
Design (25) Software Design of desargue Theorem Desargues theorem and 3D plot . (Draw only 3D images related to the desargues configuration) Introduction Introduction. This paper introduces the desargues theorem, which is a beautiful geometric theorem recognized by the Chinese and foreign mathematics circles and is also a mathematical theorem most closely relate
Software design method (reproduced) In order to solve a problem on the platform, the last basic discovery can be implemented after a long time. During migration to the project, we found that there was an issue that could not be solved by the platform. The problem has not been solved for a long time, and it is even unclear where the problem exists. At last, my colleagues analyzed the problem step by st
softwareIntergraph TANK SP1 includes major improvements and fixes including: Updated graphics mode to include 3D view, update software support API650, 12th edit, update software to support API 2000, 6th edit ... The update supports cone Roof Data, including a structural database input hardworking, which differs from the storage tank-specific
experience, a database-based system architecture, how many data tables will be there on how many pages of architecture design documents. For example, a medium database application system usually contains about one hundred data tables. Such a system design usually requires about one hundred pages of architecture
This interview was conducted by zdnet's Li Ning editor during the 2007.03 month. [Editor's note]I recently read a series of articles on the Internet titled "The Immortal wolf-I read The Mythical man-month. Zhou aimin's reading experience on "man-month God. A weighty book in software engineering describes Dr. Brooks's project management experience in the IBM System/360 family and OS/360. In his series of articles, Zhou aimin used his architect's experi
How to better design the software architecture is an eternal key topic in the software engineering field. Over the past few decades, the international software engineering community has made great strides in Software Architecture Design
Software Architecture OverviewSoftware architecture is a certain form of structured elements, that is, a collection of components, including processing components, data components and connection components. The processing component is responsible for processing the data, the data component is the information that is processed, and the connecting component connects the different parts of the architecture. Software
to group and sort in a query (5) Improve system performance with an optimized stealth device Increase the disadvantage of the index (1) Creating and maintaining indexes is time consuming (2) Index to occupy physical space (3) Indexes should be maintained dynamically when the data in the table is added, deleted, and modified As a general rule: You should create an index on the following columns: (1) On columns that are often searched (2) on the column as the primary key (3) On columns that a
tag library. A tag should inherit from javax. servlet. jsp. tagext. tagsupport and provide the Implementation of dostartag and doendtag methods.Dostartag implements business logicDoendtag control output 6. Service Worker ModeThe page flow, front-end controller mode, and view assistant mode are combined to represent a complete set of processes for "request-forwarding-View. This mode is also the implementation standard of the MVC mode, and Struts is also implemented based on this mode 7. asynchro
library, a tag should inherit Javax.servlet.jsp.tagext.TagSupport, and give Dostartag and Doendtag two methods of implementation.Dostartag Implement business logicDoendtag Control output 6. Service Worker ModelUses the page flow, front-end controller mode, and view Assistant mode to represent a complete set of processes for request-forward-view. This model is also the implementation of the MVC pattern, struts also based on this pattern to implement 7. Asynchronous Page ModeWhen remote data is c
Http://www.infoq.com/articles/agile-software-architecture-sketches-NoUML If you ' re working in an Agile software development team at the moment, take a look around at your environment. Whether It's physical or virtual, there ' s likely to be a story wall or Kanban board visualising the work yet to be started , in progress and done. Visualising your software deve
Open eye, epiphany Software Design [It168]The night is quiet, and the surrounding area is quiet, and the Earth is turned into silver. At this time, the stars in the sky are like countless starsThe Treasure of the dark night sky dotted with a few flashes. With this, the software development department on the third floor of Yijing company is brightly lit. The sky
Reprint Address: http://blog.jobbole.com/685/the following principles, not just software development, can be extended to other production activities, even in our lives .Don ' t Repeat yourself (DRY)Dry is one of the simplest laws and is the easiest to understand. But it can also be the hardest to apply (because to do so, we need to do a lot of work on generic design, which is not an easy task). It means tha
A successful management system is made up of: [50% of the Business + 50% software], and 50% of the success of the software has [25% database + 25% of the program], the database design is a good or bad is a key. The database
MYSQL database design and database design example (I) preparations before bitsCN.com database design and database design
Tags: blog http using file data io Art Shing July 27, 2014 22:28:34 GitHub Address: Https://github.com/haoxilu/ServiceManager want to program enthusiasts to change the add ... Development environment: Visual Studio. Net Framework 4.0 Everyone in the software development process, is inseparable from the database, no matter what database
In recent times, we have been thinking over and over again the needs, the outline design, the detailed design should be to their respective granularity and what their boundaries are.Depending on the function of the business, some features are designed with high requirements, and some features are very demanding. The former design thinking is very clear, to find a
case data adopts XMLThe format is organized and stored in text format, which facilitates development and maintenance. In addition, in the workflow software that Mr. Li introduced last time, we used freeciv similar to the one described in this article.The instance adopts the data (policy) and engine (mechanism) separation method. The server maintains the shared status, while the client focuses on the GUI.The process logic is stored in XMLFile, read at
We focus on what the system is doing, and in the design phase we will focus on the software implementation issues of the system, including architecture design, detailed design, user interface design and database design.As with mod
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