2018-10-15 星期一
The high level of English is a standard for a top student.
1. Our deeds determine us, as much as we determine our deeds.
2. I hope that your dreams are as sweet as you are.
3. Describe a skill you learned in math class
You should say:
What it was
How you learned it
I am going to talk about one thing we learned in math class the first year of primary school. It’s multiplication.
How we learned it was actually pretty interesting. It took several years and several steps.
Step one, before we finished addition and subtraction within 100, we were asked just to recite the multiplication table without understanding it at all, which was actually beyond the capabilities of first-graders. Luckily, the teachers made it into rhymes so even beginners could get a jump start on learning multiplication by reciting the rhymes. They are really catchy and they go like this, instead of saying 7 multiplied by 7 equals 49. We say: 77 49; 99 81. It was extremely helpful and effective.
3. Time give us experience， reading to us knowledge.
4. The face can speak a thousand emotions, but it can easily mask what the heart feels. for the happiest face may be masking the most hurting heart.
5. The beautiful thing about learning is nobody can take it away from you.
6. I love you with all my heart and soul,and promise to be with you forever.
7. Have patience with all things, but first of all with yourself.
8. Cowards die many times before their deaths; the valiant never taste of death but once.
9. Life's tragedy is that we get old too soon and wise too late.
10. Sleep is an important means for people to restore their physical strength, ensure their health and enhance their immunity.
11. In recent days, the weather in most regions is no longer hot, and people can relax and enjoy the cool autumn.
Paper
1. Mapping and localization of cooperative robots by ROS and SLAM in unknown working area
(https://ieeexplore.ieee.org/document/8105741) (http://sci-hub.tw/10.23919/sice.2017.8105741)
Abstract:
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A good map is needed for localization while…
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An accurate pose estimate is required to build a map.
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Kalman filters approach.
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Particle filters approach.
The motivation behind the particle filter approach is to deal with arbitrary
Introduction
While the field of robotics has been developing significantly in recent years, robots still have a very long way to go before autonomous systems are viable in complex real-world situations. Autonomous robots are intelligent machines capable of performing tasks in the world by themselves, without explicit human control. In controlled conditions, autonomous robots have proved to be extremely successful. The problems with autonomous systems in the real-world are numerous. A robot must have some way to perceive its environment, but it becomes difficult to logically process only the data that is relevant, while ignoring the mountains of data that is not. A robot must have some way to localize its own position, but must be prepared to maintain this state even if any given sensor may not work. A robot must have some way of changing its position, but must be able to perceive exactly how its position is actually shifting. A fully autonomous robot must be able to make decisions to change its position based on the world it perceives; it should be noted, however, that this project does not include artificial intelligence within its scope.
Robotic Operating System
ROS is a unique open source platform for communication, data acquisition, image processing, modeling and other features required for robotic applications. It is highly reliable and has a impressive speed of response. In this application, the communication feature of ROS is utilized which makes it faster to communicate with the vehicle.
While transmitting control signals from base station to vehicle, the ROS in base station acts as a publisher and the ROS at on-board computer acts as a subscriber.
While transmitting sensor feedback from vehicle to base station, the ROS in base station acts as a subscriber and the ROS at on-board computer acts as a publisher.
