ROS Kinetics + Realsens D435i + ORK + LINEMOD Object Recognition
1. ORK
Website: https://wg-perception.github.io/object_recognition_core/
ORK (Object Recognition Kitchen) is an ROS integrated object recognition library. Current Kinetic version of ROS only integrates some binary installation files of feature packages, so it needs to be compiled and installed through source code.
Install Dependent Librarie ...
Added by johnsonzhang on Wed, 07 Aug 2019 00:46:55 +0300
MySQL database-table operation-SQL statement
1. MySQL multi-table query
1.1 Foreign Key Constraints
In order to eliminate the Cartesian product in multi-table queries, MySQL can use foreign key Association queries when building tables and performing key queries between multiple tables.
Foreign key: Refer to the value of one column in Table 1 (sub) and another column in Table 2 (main), ...
Added by TVining on Tue, 06 Aug 2019 13:44:43 +0300
Detailed configuration and alarm of nagios
I. Demand
The update speed of Nagios is very fast. The company adopts the latest stable version nagios-4.0.8 and the plug-in is nagios-plugins-2.0.3. After using and testing the new version, it is found that the speed and alarm speed are much faster than before.
Moreover, it occupies little operati ...
Added by sparkie624 on Tue, 06 Aug 2019 11:24:50 +0300
Basic usage of xpath
Introduction to xpath
What exactly is xpath? Simply put, XPath is a language for finding information in XML documents
An XML document is a tree composed of a series of nodes. For example, here is a simple XML document:
<html>
<body>
<div>
<p>Hello world<p>
< ...
Added by bing_crosby on Tue, 06 Aug 2019 05:48:04 +0300
tomcat Log Details
https://www.cnblogs.com/operationhome/p/9680040.html
1 tomcat log details
1.1 tomcat log configuration file
The configuration file of tomcat corresponding to the log: / conf/logging.properties under the tomcat directory.
tomcat's log level includes: SEVERE (highest level) > WARNING > INFO > CONFIG > FINE > FINER (elaborate) ...
Added by ngoweb on Tue, 06 Aug 2019 05:43:31 +0300
mybatis framework learning-traditional dao layer development
Preface
mybatis officially recommends using the mapper proxy method to develop the mapper interface. Programmers do not need to write mapper interface implementation classes.
When using the mapper proxy method, the input parameters can use pojo wrapper object or map object to ensure the universality of dao.
Traditional dao layer development ...
Added by xzilla on Mon, 05 Aug 2019 21:52:01 +0300
CRM Multi-Conditional Filtering and Paging - Day 16
- Restore content to start ---
1.1 CRM first displays the fields to be filtered
The front-end code is as follows:
{% for condtion in admin_class.list_filters%} <div class="col-lg-2"> <span>{{condtion}}</span>
</div>
The list_filters filtered field values are defined in the class Customer(admin_cla ...
Added by medusa1414 on Mon, 05 Aug 2019 21:42:55 +0300
MySQL Case -- Optimizing OR Statement Trample Recording
Problem Description
R&D colleagues feedback that an application is slow to execute, corresponding to SQL:
UPDATE bs_serial_trac
SET SERIAL_IS_LOCK = 0,
LOCK_VALUE = '',
UPDATE_USER = 'transSys'
WHERE GOODS_NO = '4418095740626'
AND (
PARENT_CODE = 'F9G7S19722001835'
OR SERIAL = 'F9G7S19722001835'
);
The index on table bs_s ...
Added by KC_Geek on Mon, 05 Aug 2019 11:48:33 +0300
Use Varnish to speed up your site
(1). Overview of Varnish
Varnish is a high performance open source HTTP accelerator that can effectively reduce the load on the web server and increase access speed.According to the official statement, Varnish is a cache-type HTTP reverse proxy.
Poul-Henning Kamp, author of Varnish, is one of FreeBSD's core developers and believes that comput ...
Added by Jezz on Sun, 04 Aug 2019 19:42:02 +0300
. net core implements task scheduling based on cron expression
Intro
Last time we implemented a simple Timer-based timing task. Details can be seen This article.
However, it may not be appropriate to use this method slowly. Some tasks may only want to execute in a certain period of time. It is not so flexible to use timer only. We hope that we can specify a cron expression like quartz to specify the execu ...
Added by Das Capitolin on Sun, 04 Aug 2019 18:46:26 +0300