quora system design

This article from http://www.cnblogs.com/jiapengliang2005/articles/1632745.html 1 Database Design Overview Database Design refers to constructing the optimal database mode for a given application environment, establishing a database and its application system, so that it can effectively store data.Basic Steps for Database

UI switches to another UI, and one UI returns to the previous UI.According to the usual rules, we will mainly set up three rules of the UI operation mode,A call UI popup close rule (popup,popdown), which can be implemented in an interface to pop up any interface, and then after the popup, do not close the interface, such as after the battle victory, you must be certain to launch the current pop-up window. A bit like a modal dialog box in Windows programming.One is called the UI entry Exit rule

This series of blog posts will use the Microsoft Ria technical solution Silverlight and the scalability management framework managed extensibility framework (MEF), with the plug-in architecture design as the wire, I share my skills and experience in implementing plug-in system architecture design in the RIA system buil

Lecture content: This series of courses will use the Case Teaching Method to deeply analyze Microsoft's distributed application design method and implementation process based on. NET 3.0. In the first course, we will detail how to design a new software architecture for enterprise applications based on. NET 3.0. Course INSTRUCTOR: Xu xiaozhuo, chief technical consultant, Changsha mengwei Technology Co., L

Niu Yun news system (I)-UML, database design, and news system umlNiu Yun news system (I)-UML and database designI. Initial Knowledge of the niuyun System Niu Yun (Brisket)That is, the beef abdomen and soft muscles close to the beef ribs refer to meat with tendon, meat, and

Meaning of system callIn order to interact with processes on the user space, the kernel provides a set of interfaces.The application accesses hardware and other operating system resources through this set of interfaces.Complete control of hardware and resource access. Safe, reliable, multi-tasking, virtual mustAbstraction of the hardware device (providing the independence of the device).exception, sink,

Database Design of customer management system and database of Customer Management System The Database Design of the customer management system is developed using the SQL Server 2008 database. The customer management system (Custom

Agent System design document for Atitit.atiagent agent distribution system1 . Start Project 12 . First also 23 . Login Function 24 . User Center 25 . Recharge Enquiry 36 . authorizing subordinate agents 47 . my commission. 58 . View Sub-players 69 . View subordinate Agents 71 0. Database Documentation Agent71 0.1. Acc user account and parent agent ID Association field 71 0.2. Recharge Record tabl

The first step is to design the [System Management] module, which is also a general system step. The simple UML activity diagram is as follows: Databases include:LoginfoOperation Log information table sysoptlogOrganization basic info table mrbranchDepartment basic information table mrdepartment [the organization level is higher than the Department level. The or

Copyright Notice: NOTE-taker fugitive pawns love freedom, advocating sharing. But this note stems from the www.jtthink.com (programmer in the awkward way) Judging teacher's "web-level MySQL subversive combat course." For reprint please respect the teacher Labor, retain the judging teacher attribution and course source address. 　　Mr. Shen takes us to the product list first.Fixed goods: For example, we just sell shoes, then the whole product properties are basically consistent, such as shoes color

In general computer application development, requirement analysis is required, which is involved in "Software Engineering" or "system analysis and design. What is the difference between IRP demand analysis? It mainly includes the following aspects:1) The business scope of the analysis is different. IRP's demand analysis emphasizes the analysis of the entire enterprise, the majority of the enterprise, or the

Label:Do more than the MIS system, a long time ago this idea, want to put the MIS system user rightsManagement and approval flow management stand-alone, separate componentsToday, for the time being, look at the database table design of the Authority management system.subsystem table, because I design here in order to b

= "/error/error.jsp"; } goTo (Request,response,uri); } Private voidGoTo (HttpServletRequest request, httpservletresponse response, Object URI)throwsservletexception, IOException {if(URIinstanceofRequestDispatcher) {((RequestDispatcher) URI). Forward (Request,response); }Else if(URIinstanceofString) {Response.sendredirect (Request.getcontextpath ()+URI); } }}Common problems1. Cuisine ManagementIf you delete a cuisineFirst judge whether the current cuisine has been referenced, i

ArticleDirectory I. Review in the previous chapter Ii. Summary Iii. Outline of this Chapter Iv. Multiple Ways to separate concerns V. Related Design Methods Vi. Summary in this Chapter VII. Series progress 8. next announcement IX. Demo download I. Review in the previous chapter In the previous chapter, we mainly discuss the specific principles and norms in the system

Model Design reason: GPS provides global, around-the-clock, and real-time navigation Advantages. However, when satellite signals such as high-rise buildings, Boulevard, overpasses, and culvert tunnels are "blind spots, GPS cannot provide users with precise navigation information, especially continuous navigation information. Dr (dead-reckoning) uses a direction sensor (Gyroscope) and a speed sensor (mileage meter) to estimate the instantaneous locatio

1. Commodity Management1.1Create a product, modify a product, delete a product , a list of items, a condition query1.2 Product Categories2. User Managementbasic information, receiving address, balance of funds3. Order ManagementOrder list, freeze, thaw, void, modify payment status, etc.4. Financial managementRecharge record, user's recharge historyWithdrawal record, user's withdrawal history recordAccounting records, e-commerce platform party Capital Ledger changes5. Log ManagementOperation log:

threshold)How to Automatically select thresholds: Calculates the F1 value , F1 score = 2PR/(P + R), whichever threshold corresponds to the highest value.TPR:TP/(TP + FN)FPR:FP/(TN + FP)Formation of ROC curve : Sensitivity, specificity (left convex)Data issuesGetting a lot of data in many cases is a good way to get a high-performance learning algorithm, but don't blindly collect large amounts of data.A better way: we have a lot of data (low variance, avoid overfitting), and we train a learning a