2018-10-13 Saturday

The high level of 中文版 is a standard for a top student.

1. If you smile, even if your ' re in a bad mood, it'll immediately improve your mood.

2. True mastery of any skill takes a lifetime. ????

3. What does think of the traffic in your city

Well, I think it ' s terrible, especially during rush hours. The traffic could get so heavy, everywhere would is jammed. You won ' t is able to turn around or turn back. But I guess I can ' t complain because I think we situation is the to-do better than the situations in bigger cities such as Beij ING and Shanghai. After all, my city was, what do we call, a second-tier city or even a third-tier city, depending on where you ' re sitting. In addition, the Government have been working on it. We have built express ways and the subway to alleviate the problems and I believe things would pick up.

4. Vanity and pride are different things, though the words is often used synonimously. A person could be proud without being vain. Vanity to what we would has others think of us.

5. May never is good enough for some people, and you'll always be the best for those who deserve.

6. Life was too short to worry on what the others say or think about you. So has fun and give them something

7. I am always doing this which I can not does, in order that I could learn how to do it.

8. Everyone has he own direction to pursue, does not is taken away from the rhythm, to restart a section of the road before You must does a construction of their own hearts, whether the future is better or worse, was just another day. Would there is no end to the end? We are always on the road.

9. Love had made me see things in a different to

Direction is much more important to speed.

One. Living is to change the world. Is there any other reason?

Language is the medium of affective communication and information transfer.

Paper

1. ROS Based service robot Platform (https://ieeexplore.ieee.org/document/8384644)

(https://sci-hub.tw/10.1109/iccar.2018.8384644)

Abstract:

The substitution of a human factor by an affordable low-cost robotic system have been increasing recently. (background)The reason being, the robot is expected to does less errors than a human does and does don't have a would of its own.This paper proposes a service robot platform that's capable of mapping, localizing itself and navigating in an indoor Environment and is the best suited for structured environment with static obstacles.The approach used for mapping are a ROS package which are a Ros wrapper of Real time appearance Based mapping with the Help of a low cost rgb-d camera, the Microsoft Kinect XBOX all in a turtlebot robot model for visualization. Rtab-map takes into account loop closure in real time constraints with a memory management technique which makes the Mappi NG process independent of time and size. Once the mapping is do and the 2D projection of the map is obtained of our real indoor environment of the lab, the Simul Ation of the autonomous navigation of the robot model to the desired was done on Gazebo. For the navigation to happen successfully, Adaptive Monte Carlo Localization is used for localizing the Turtlebot model in the map. The simulation results were visualized using Rviz and were found to be satisfactory.Gazebo Tutorials

1. Make a model (Http://gazebosim.org/tutorials?tut=build_model&cat=build_robot)

2. Make a Mobile Robot (Http://gazebosim.org/tutorials?tut=build_robot&cat=build_robot)

1.mkdir -p ~/.gazebo/models/my_robot

2.  gedit ~/.gazebo/models/my_robot< Span class= "pun" >/model.

3.gedit ~/.gazebo/models/my_robot/model.sdf

3. Model structure and requirements (Http://gazebosim.org/tutorials?tut=model_structure&cat=build_robot)

4. Building a World (http://gazebosim.org/tutorials?tut=build_world&cat=build_world# Addingmodelfromthemodeldatabase)

Terminology

• world: the term used to describe a collection of robots and objects (such as buildings, tables, and lights) , and global parameters including the sky, ambient light, and physics properties.
• static: entities marked as Static (those having the <static>true</STATIC>   element in SDF), is objects which only has collision geometry. All objects which was not meant to move should being marked as static, which is a performance enhancement.
• dynamic: entities marked as Dynamic (either missing The <STATIC>  element or Setting false in SDF), is objects which has both Inertia and a collision geometry.

5. Modifying a World (Http://gazebosim.org/tutorials/?tut=modifying_world)

6. Visibility layers (Http://gazebosim.org/tutorials?tut=visual_layers&cat=build_robot)

7. Inertial parameters of triangle meshes (Http://gazebosim.org/tutorials?tut=inertia&cat=build_robot)

8. Make an animated model (actor) (Http://gazebosim.org/tutorials?tut=actor&cat=build_robot) (amazing! ）

Overview

This tutorial explains how to use Gazebo's "actors" to create scripted animations.

animations is useful if you want to has entities following predefined paths in simulation without being affected by The physics engine. This means they won ' t fall due to gravity or collide with other objects, for example. They would, however, has a 3D visualization which can be seen by RGB cameras, and 3D meshes which can is detected by G PU based depth sensors.

The tutorial explains in detail-to-create open-loop trajectories which don ' t interact with the rest of the simulation. Towards the end, we'll take a quick look at an example plugin which controls animations based on feedback from the ENVI Ronment.

Skeleton animation, which is relative motion between links in one model:

Motion along a trajectory, which carries all of the actors ' links around the world, as one group:

Both types of motions can be combined to achieve a skeleton animation which moves in the world:

ROS Robot Instance-turtlebot (https://zhuanlan.zhihu.com/p/35822939)

2018-10-13 Saturday