Tag: case

Practical data analysis | Logistic regression – automatic diagnosis and analysis of cases

Table of Contents 1. Data and analysis objects 2. Purpose and analysis tasks 3. Methods and Tools 4. Data reading 5. Data understanding 6. Data preparation 7. Model training 8. Model evaluation 9. Model parameter adjustment 10. Model prediction 1. Data and analysis objects CSV file – “bc_data.csv” Dataset link: https://download.csdn.net/download/m0_70452407/88524905 This data set mainly […]

Practical data analysis | KNN algorithm – automatic diagnosis and analysis of cases

Table of Contents 1. Data and analysis objects 2. Purpose and analysis tasks 3. Methods and Tools 4. Data reading 5. Data understanding 6. Data preparation 7. Model training 8. Model evaluation 9. Model parameter adjustment 10. Model improvement 11. Model prediction 1. Data and analysis objects CSV file – “bc_data.csv” Dataset link: https://download.csdn.net/download/m0_70452407/88524905 This […]

The use of C++ smart pointers: the use of shared_ptr, weak_ptr, unique_ptr, use case description.

Directory of series articles Contents of this chapter: (1) Introduction to shared_ptr, weak_ptr, unique_ptr (2) Memory leak caused by using share_ptr alone (3) Combined use of shared_ptr and weak_ptr Article directory Table of Contents of Series Articles Preface 1. Use of shared_ptr, weak_ptr, unique_ptr 1.1 shared_ptr 1.2 weak_ptr 1. Creation of weak_ptr pointer 2. Member […]

Multi-threading case–>Blocking queue

1. What is a blocking queue 1. The blocking queue is a special queue that also adheres to the “first in, first out” principle. 2. The blocking queue can be a thread-safe data structure with the following characteristics: When the queue is full, if you continue to queue, it will be blocked until other threads […]

Network Test Technology_LDAP Protocol Test Case

Directory 1. Overview of LDAP protocol 2. LDAP protocol simulation test on Supernova 3. Applicable scenarios in Supernova tester 3.1 Gateway mode 3.3 Application service model 3.4 Terminal mode 4. Main configuration parameters of LDAP use case 4.1 Allocate CPU cores 4.2 Speed limit configuration 4.3 Packet capture settings 4.4 Number of virtual users 4.5 […]

(6) Actual combat of inventory oversold cases – using mysql distributed locks to solve the “oversold” problem

Foreword This section is the final article on using distributed locks to solve the “oversold” problem of concurrent access. In the previous chapters, we introduced the use of mysql’s row locks, optimistic locks, and pessimistic locks to solve the oversold problem caused by concurrent access. There are The problem is that row locks, optimistic locks, […]

[Performance Test] CPU problem location and analysis + thread blocking case analysis, one article directly on the high speed…

Table of Contents: Introduction Preface 1. Python programming from entry to proficiency 2. Practical implementation of interface automation projects 3. Web automation project actual combat 4. Practical implementation of App automation project 5. Resumes of first-tier manufacturers 6. Test and develop DevOps system 7. Commonly used automated testing tools 8. JMeter performance test 9. Summary […]

Example of custom SQL statements using case/when statements to implement paging queries and classification sorting in JPA programming

1. Requirement background Query the list of work orders initiated by me and invited by me. It requires paging query. The specific requirements for sorting are: Sort by status first, with unprocessed items at the front Then sort by handler, those who were invited are ranked first, and those who initiated themselves are ranked last. […]