rfm analysis

Log analysis software upgrade, we in the last 10 kinds of alarm (non-Office hours access, non-work location access, password guessing, account guessing, account guessing success, sensitive file operation alarm and high-risk command operation, host scan, port scan, illegal external) on the basis of increased SQL injection, XSS attack, path traversal, Webshell, website sensitive file access, and CC attack alarms.SQL injectionThe following alarms are gen

Analysis of memory overflow instances referenced by PHP objects and Analysis of php instances Generally, one of the biggest advantages of using a scripting language is to use its automatic garbage collection mechanism to release memory. You do not need to release the memory after using the variable, because these PHP will help you.Of course, we can call the unset () function as needed to release the memory,

Analysis of php cross-site attack instances and php cross-instance analysis This article describes the principles and defense techniques of php cross-site attacks. Share it with you for your reference. The specific method is analyzed as follows: Cross-Site attacks take advantage of some program details or bugs. How can we prevent cross-site attacks? The following is an example of how to prevent cross-site a

Spring Source Code Analysis-detailed analysis of BeanFactory system interfacesThe previous blog post analyzed Spring's Resource class Resouce. I started to analyze the IOC part of Spring today. As we all know, IOC is the most fascinating part of the Spring framework. Its most important interface is BeanFactory. BeanFactory has a huge inheritance and implementation system, and has many sub-interfaces and imp

ScheduleThreadPoolExecutor source code analysis, jquery source code analysis ScheduleThreadPoolExecutor source code analysis (1) In Java, ScheduleThreadPoolExecutor is mainly used to execute delayed tasks or execute tasks at a certain frequency. The scheduleAtFixedRate function executes tasks at a certain frequency. scheduleWithFixedDelay can execute tasks ba

Python data analysis: two-color ball statistics of which combination of red and blue balls is high, python Data Analysis This article describes how to calculate the ratio of two red and blue balls in a two-color ball statistical method based on Python data analysis. We will share this with you for your reference. The details are as follows: Count the combination

Data analysis and presentation-NumPy database entry, numpy database for data analysis This is the note of my course "Python data analysis and display" from songtian, Beijing University of Technology. The course has outstanding emphasis and clear layers. Here, I would like to thank you for your wonderful explanation.NumPy library entry data dimension A dimension i

Analysis of classes in python, and analysis of python Methods This article analyzes some methods of classes in python and shares them with you for your reference. The specific analysis is as follows: Let's take a look at the following code: class Super: def delegate(self): self.action() class Provider(Super): def action(self): print 'in Provider.

Python base-class function overload and call instance analysis, python instance analysis This document describes how to reload and call Python basic functions. Share it with you for your reference. The specific analysis is as follows: I have not been familiar with the Python language for a long time. I am not very familiar with many features of this language, and

Python Backtracking Method for Analysis of output instances in full array arrangement and python instance analysis This article describes how to implement full array output by using the python backtracking method. Share it with you for your reference. The specific analysis is as follows: Full arrangement explanation: Any m (m ≤ n) elements from n different elem

Anti-pattern instance analysis and Python instance analysis in python Programming This article describes the anti-pattern in Python programming. Share it with you for your reference. The specific analysis is as follows: Python is one of the most popular programming languages nowadays. Simple and expressive syntax, two or three lines of code can solve the problem

operation to modify the HASHMAP structure (add or delete data, etc.) will be thrown concurrentmodificationexception exception, as in the previous analysis, when the iterator appears fail-fast A few important member variablesstatic final int DEFAULT_INITIAL_CAPACITY = 16; // The default initial capacity - MUST be a power of two.static final int MAXIMUM_CAPACITY = 1 The default size is 16, and the default load factor is 0.75. As noted in the no

Guo JiaEmail: [Email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwells"Android SDK program reverse analysis and Hack series" chapter index one DEX file data structureThe data types that Dex uses are shown in the following table:U1~u8: Represents the unsigned number of 1~8 bytes.The LEB128 data types that are unique to sleb128, uled128, and Uled128pl:dex files. Each LEB128 consists of a single byte, all of which are gr

MySQL index optimization case analysis and mysql index Case Analysis Order by desc/asc limit M is a scenario that I often encounter in mysql SQL optimization. Its optimization principle is also very simple, that is, using the Order of indexes, the optimizer scans data in the order of indexes and stops scanning data in M rows that meet the criteria. It looks very simple, however, I often see that many SQL st

PHP-based event mechanism instance analysis and php-based instance analysis This example describes the PHP-based event mechanism. Share it with you for your reference. The specific analysis is as follows: There are not many languages with built-in event mechanisms, and php does not provide such a function. Event is simply an Observer mode, which is easy to implem

Website bottleneck analysis-MYSQL performance analysis, website bottleneck mysql Performance 1. Slow query settings and Analysis Search for slow query parameters mysql> show variables like 'long%';+-----------------+----------+| Variable_name | Value |+-----------------+----------+| long_query_time | 10.000000 |+-----------------+----------+ mysql> show vari

This article from http://blog.csdn.net/yihongyuelan reprint please be sure to indicate the sourceThe code in this article takes the MTK platform Android 4.4 as the analysis object, which is somewhat different from Google's native AOSP. Please be aware of it.Overview I have analyzed the InCallScreen structure (portal) of Android 4.2 before, but Google later published Android 4.4, I .e. Kitkat. Then I decided to reorganize and record the previous articl

System APP and common APP analysis, systemapp Analysis In the Android system, there are two types of apps. One is system-level apps, such as making phone calls, sending text messages, taking photos, etc. The most obvious characteristic of these apps is that normal methods cannot be uninstalled. The other is a common App. Users can download apps that are manually installed from the App market. Such apps ca

Example of cosine similarity algorithm calculated by the PHP Data analysis engine, cosine of Data Analysis This example describes the cosine similarity algorithm calculated by the PHP Data analysis engine. We will share this with you for your reference. The details are as follows: For more information about cosine similarity, see Baidu Baike: cosine Similarity

In-depth analysis of dynamic Fragment management, in-depth analysis of fragment 1. Relationship between Fragment and Activity To understand how to dynamically manage Fragment, first understand the relationship between Fragment and Activity. Fragment can be understood as dividing an Activity into several fragments. Fragment is a part of the Activity, and its lifecycle depends on the Activity.