Course15144
Course Introduction:There has been a rumor in the world that "PHP is the best language in the world". Is it true or false? Don't you want to find out? This set of courses starts from the most basic PHP syntax, from the shallower to the deeper, giving you a different learning experience.
Course22429
Course Introduction:"PHP Object-Oriented Video Tutorial" This course is recorded by Boole Education. It explains the basics, abstract classes, and interfaces of PHP object-oriented in a simple and easy-to-understand manner. It also briefly describes the three major characteristics of PHP object-oriented: encapsulation, inheritance, and polymorphism. Having said so much, let’s learn it together! !
Course73923
Course Introduction:The mysql tutorial "MySQLi Process-oriented Quick Start" is a video tutorial originally recorded by the PHP Chinese website. As an enhanced version of traditional MySQL, MySQLi is used more and more widely. According to programmers' programming habits, it is divided into two types: process-oriented and object-oriented. This set of courses is mainly process-oriented, and introduces commonly used functions in detail, including CURD. operate.
Course5288
Course Introduction:Flume is a distributed, reliable system. It can efficiently collect and integrate data, and can also move large amounts of data from different sources to data centers for storage. Flume is a top-level project under Apache. Flume can not only collect and integrate log data, because the data source can be customized, Flume can be used to transmit large amounts of log data, which includes not only network transmission data, data generated by social media, email information, etc.
Course7370
Course Introduction:Object-oriented programming (OOP for short) is not only a need for developing large-scale projects, but also a tool for analyzing problems. PHP has complete object-oriented programming capabilities and can complete the development of large-scale commercial projects. This course combines the object-oriented technology in PHP , break it apart and crush it, and I’ll tell you slowly.
2023-11-17 13:52:29 0 1 293
Laravel 9.x: Redirect user to view success message after registration
2023-11-12 22:55:21 0 1 336
Website traffic statistics are inaccurate.
2023-11-12 21:49:13 0 0 137
Increase file upload size in Apache configuration
2023-11-11 11:00:33 0 1 287
Course Introduction:Let the function fx vector a vector b vector c where the vector asinx let the vector d(h,k) so x'=x-h;y'=y-kx=x'-h;y=y'-k and then put the above formula into The original F(x) yields y'-h=2+√2sin(2x-2h-3π/4). Now we see the condition of "making the image obtained after translation centrally symmetrical about the origin of the coordinates" in the question. That is to say, when x =0, the equation after the second translation g(0)=0, so at this time -2h-3π/4=kπ h=3π/8-kπ/2, and then we get d(3π/8-kπ/2, -2) The key to answering this question is to set up the vector x'=x-h;y'=y-kx=x'-h;y=y'-k according to the translation method
2024-01-20 comment 0430
Course Introduction:Directed traffic refers to traffic packages that are only used for mobile applications and content. Directed traffic is generally provided by operators, and you need to order the corresponding directional traffic package before using it. The general price of targeted traffic is lower than that of general traffic, but the selection of targeted applications is limited.
2020-10-30 comment 09193
Course Introduction:在 MATLAB 中,向量用一维数组表示,有两种表示方法:行向量,用方括号 [ ] 表示,元素用逗号分隔。列向量,用分号 ; 分隔元素,用换行符换行。
2024-06-09 comment 0761
Course Introduction:Vector dot product formula: a·b=|a|*|b|*cosθ dot product, also called the inner product and quantity product of vectors, is the product of a vector and the length of its projection on another vector; it is a scalar. The dot product reflects the "similarity" of two vectors. The more "similar" the two vectors are, the greater their dot product is. Example: If vector a=(a1,b1,c1), vector b=(a2,b2,c2) vector a·vector b=a1a2+b1b2+c1c2 cross product formula: a×b=|a|*|b| *sinθ cross product is also called the outer product and vector product of vectors. The result is a vector modulus length: |vector c|=|vector a
2023-05-02 comment 01149
Course Introduction:Linear support vector machine (LSVM) and general support vector machine (SVM) are machine learning models commonly used for classification and regression. Their core idea is to separate different classes or solve regression problems by finding the optimal hyperplane in the data space. Although they both fall under the category of support vector machines, there are some differences between them. LSVM is a support vector machine model based on a linear kernel function, which assumes that the data can be well segmented by a linear hyperplane. Its advantage is that it is computationally simple and easy to interpret, but it can only handle linearly separable problems and may not work well for nonlinear data. SVM is a more general support vector machine model that uses kernel functions to map data into a high-dimensional feature space, thereby converting nonlinear problems into linear
2024-01-23 comment 0770