English: listening、speaking、reading、writing、translation
1. I often have a feeling that if something happens and you don’t solve it bravely, then it is going to happen again.
2. Life is really like this, it will make you confront many obstacles again and again until you overcome them.
3. No one can call back yesterday.
4. Luck is just a by-product. Good luck comes from a pure mind free of egoism.
5. Worrying now will not erase the troubles of tomorrow, but it will take away the courage you have today.
***** https://www.rfid-wiot-tomorrow.com/guiding-system-for-the-visually-impaired-4-0-306
*****https://www.rfidjournal.com/
paper
1. Robot Navigation System Using RFID (https://www.irjet.net/archives/V3/i10/IRJET-V3I10104.pdf) (simple!!!)
Abstract - The paper proposes a technique in which we use radio frequency in robot assisted navigation which can be used for various purposes. In our approach RFID is used to determine the location indoors, the robot automatically moves along hallways using the scanned range data until a tag is found and then reads the unique serial number from the same tag for the next movement and this cycle continues until it reaches its final destination. We use a microcontroller (Atmega16), a RFID reader both mounted on the PCB which is further attached to the chassis along with motor drivers and wheels. The RFID tags are placed at locations pre-decided by the users. Our proposed techniques have real world applications such as intelligent navigation for wheelchairs, in nuclear power plants where the humans can be prone to many disasters.
patent
1. RFID navigation system (https://patents.google.com/patent/US20030080901A1/en) (out of date!!! but the idea have some reference value)