Why can't SMI blockchain open

1. Xiong'an blockchain can't log in. You can refresh it or reload the system.

2. The thickness of wood board is 1.5cm, and the thickness of wood board is OK. The scanner is under the wood board at the entrance and exit of carrier pigeon, and there is a gap of 2-3cm with the wood board. The electronic scanner scans the electronic ring of carrier pigeon, and the effective height distance is 10-15cm, a few centimeters is enough to be traced.

3. Yes, they are generally wild cats, but domestic cats don't
I hope my answer can help you. I wish you a happy life and good health!

4. Cats and dogs

5.

RFID generally refers to radio frequency identification technology (communication technology term)

RFID, also known as radio frequency identification, is a kind of communication technology, which can identify specific targets and read and write relevant data through radio signals without establishing mechanical or optical contact between the identification system and specific targets

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the basic working principle of RFID technology is not complicated:

after the tag enters the magnetic field, it receives the RF signal from the reader and sends out the proct information (passive tag or passive tag) stored in the chip with the energy obtained by the inced current, Or the tag sends the signal of a certain frequency actively, the reader reads the information and decodes it, and then sends it to the central information system for data processing

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7. What is < pre > RFID
RFID is the abbreviation of radio frequency identification, namely radio frequency identification, commonly known as electronic tag
what is RFID technology
RFID is a kind of non-contact automatic identification technology, which can automatically identify the target object and obtain relevant data through the radio frequency signal. The identification work does not need manual intervention, and can work in a variety of harsh environments. RFID technology can identify high-speed moving objects and multiple tags at the same time, which is fast and convenient to operate
RFID is a simple wireless system with only two basic devices, which is used to control, detect and track objects. The system consists of an interrogator (or reader) and many transponders (or tags)
What are the basic components of RFID
tag: it is composed of coupling elements and chips. Each tag has a unique electronic code, which is attached to the object to identify the target object
Reader: a device that reads (and sometimes writes) tag information, which can be designed as a handheld or fixed device
antenna: transmit RF signal between tag and reader
what is the basic working principle of RFID technology
the basic working principle of RFID technology is not complicated: after the tag enters the magnetic field, it receives the RF signal from the reader, and sends the proct information (passive tag or passive tag) stored in the chip by virtue of the energy obtained by the inced current, or actively sends the signal of a certain frequency (active tag or active tag); After reading and decoding the information, the reader sends it to the central information system for data processing
a complete set of RFID system is composed of reader, tag, so-called transponder and application software system. Its working principle is that the reader transmits a specific frequency of radio wave energy to the transponder, which is used to drive the transponder circuit to send out the internal data. At this time, the reader will receive and interpret the data in order, Send it to the application for corresponding processing
in terms of communication and energy sensing between RFID card reader and electronic tag, it can be roughly divided into two types: inctive coupling and backscatter coupling. Generally, the first type is adopted for low-frequency RFID, while the second type is adopted for high-frequency RFID
depending on the structure and technology used, the reader can be a read or read / write device, which is the information control and processing center of the RFID system. Reader is usually composed of coupling mole, transceiver mole, control mole and interface unit. Generally, half plex communication is used to exchange information between reader and transponder, and the reader provides energy and timing for passive transponder through coupling. In practical application, the object recognition information collection, processing and remote transmission management functions can be further realized through Ethernet or WLAN. Balise is the information carrier of RFID system. At present, most balise is composed of coupling element (coil, microstrip antenna, etc.) and microchip

8. The explanation of Junpu electronic tag for RFID electronic tag is as follows:
radio frequency identification (RFID) technology, also known as radio frequency identification (RFID), is a communication technology, which can identify specific targets and read and write relevant data through radio signals without establishing mechanical or optical contact between the identification system and specific targets
RF, generally microwave, 1-100ghz, is suitable for short-range identification communication
RFID reader is also divided into mobile and fixed. At present, RFID technology is widely used, such as library, access control system, food safety traceability, etc
radio signals transmit data from tags attached to objects through electromagnetic fields tuned to radio frequencies to automatically identify and track the objects. Some tags can get energy from the electromagnetic field emitted by the recognizer ring recognition, and do not need batteries; There are also tags that have their own power supply and can actively emit radio waves (electromagnetic fields tuned to radio frequencies). Tags contain electronically stored information that can be identified within a few meters. Unlike bar codes, RFID tags do not need to be in the line of sight of the identifier, but can also be embedded in the tracked object
RFID technology is used in many instries. The label is attached to a car in proction, so the factory can track the progress of the car in the proction line. The warehouse can track where the drugs are. RFID tags can also be attached to livestock and pets to facilitate positive identification of livestock and pets (positive identification means to prevent several livestock from using the same identity). RFID identification cards allow employees to enter the locked parts of the building, and RF transponders on cars can also be used to collect fees for toll roads and parking lots
some RFID tags are attached to clothing, personal belongings, and even implanted into the human body. Because this technology may read personal information without my permission, this technology will also infringe personal privacy
Junpu Technology Co., Ltd. address: 139 Xinhui Road, high tech Zone, Ningbo City, Zhejiang Province

9.

bus route: Cixi No.291 → Yuyao No.102, the whole journey is about 20.8km

1. Walk about 220m from Cixi passenger transport west station to Cixi passenger transport west station

2. Take Cixi No.291, pass 21 stations to Yuyao North Station

3. Walk about 640m to Yuyao North Station

4. Take Yuyao No.102, pass 11 stations to Yuyao railway station

5 Walk about 220 meters to Yuyao railway station