Chapter 1726: Access Card

A large open space in front of Building 8 and Building 9 had several excavators working with a rumble.

The spring wind in Jiangzhou is relatively strong, and today's weather is still quite good.

But several excavators were digging trenches, still full of dust.

In addition, the harsh sound of smashing walls and electric drills in several buildings could be heard from far away, even louder than the excavators digging trenches.

Looking up, some windows were open, and it was clearly visible that dust was drifting out.

"After the winery staff finished the procedures, they started decorating." Dong Chang looked up: "The Chairman's younger brother, Officer Sun should know, right."

"365 Home has cooperation with us. As long as winery staff buy 365 furniture, not only will there be a big discount, but also free design. In addition, 365 Decoration and Decoration Company also has not small discounts."

Dong Chang pointed to the front: "That is Building 8 and Building 9. They are digging an artificial lake in front. The dust is too big, let's go around from the back."

Dong Chang introduced while walking: "The large square outside the west gate, you saw it when you came, right? Opposite is the Qiudongfang Shopping Plaza, shopping is very convenient in the future."

"Also, the West Gate Square, close to the river embankment, built a pedestrian bridge, leading directly to the north bank, but now there is nothing on the north bank."

"Why was such a pedestrian bridge built? I don't know how it was planned at the beginning. What I want to say is. The artificial lake in the community is citing Jiangzhou river water."

"It is at the head of that pedestrian bridge, an opening was made, there is a water gate below, and the pipes are all inside. The square outside has also started construction, and the river channel is being dug."

"The river water will go around the square outside, enter from the west gate, flow into the artificial lake in front of Building 8 and Building 9, and then flow out from the east gate of the community."

"The artificial lake is not just for raising fish, but also will install a set of large music fountain system, spent 1.8 million, invited the National Civil Engineering Society and the Standardization Building Water Supply and Drainage Committee to design and install, it is said that the audio equipment is imported."

The conception and germination of music fountains started in the 1930s. In 1930, a German named Otto Pisterho first proposed the idea of combining fountains with music.

And designed it into a small device applied to hotels and shopping malls, and then gradually developed into large-scale and diversified.

Domestic music fountain research and development was in the mid-80s. To beautify the environment and enrich the cultural life of the people, multiple music fountains were introduced and designed and built by themselves.

In 1989, the Water Supply and Drainage Design Manual was published, which listed water feature design as a special chapter in the design manual for the first time. In 1990, the Building Water Supply and Drainage Design Code, which began to be implemented, listed fountain design as a special section in the national design code for the first time.

In 1991, under the vigorous promotion of the National Civil Engineering Society Building Water Supply and Drainage Committee and the National Standardization Association Building Water Supply and Drainage Committee, the first National Fountain Seminar was held.

Relevant specialized design regulations and terminology standards for fountains were also publicly released, and music fountains, with their gorgeous and varied water columns, and water columns jumping with music, give people double enjoyment of vision and hearing.

"Before May 1st next year, the greening, lighting, and sky gardens of the entire community will all be completed. In addition, the river embankment will also build a 1.5-kilometer Cherry Blossom Avenue, which will plant 3,000 to 3,500 cherry blossom trees."

"Just like the poem written by Li Bai: Wait for the wine to wake up tomorrow, and seek spring sunshine with you. In April the year after next, you will be able to see the romance when the cherry blossoms bloom..."

Unexpectedly, this guy still has the potential of a literary youth. While talking, he arrived at the unit door of Building 8. Dong Chang took the access card and swiped it on the access control, and the door opened with a "click".

"This is an access card. In the future, you can enter the community and unit door by swiping the card."

Access cards emerged in the 1960s, and at that time they were password access controls.

But after only ten years, that is, in the 1970s, contact magnetic stripe cards were born, which changed the habit of human beings using keys to enter and exit.

Allowing human beings to enter and exit places to become electronic, and at the same

By the end of the eighties, Radio Frequency Identification technology was introduced into card technology, which is commonly known as the ID card.

It possesses the characteristic of contactless access control, requiring no physical contact between the card and the card reader.

However, this first generation of technology was a 125KHz low-frequency card, which was unencrypted. It only contained a card number inside, which anyone could read, so its application was relatively singular.

This is because the radio frequency signal of low-frequency access cards is weak and easily interfered with or copied. People can read the information on a low-frequency access card and copy an identical card, thereby impersonating the cardholder to enter restricted areas.

But in daily life, for scenarios where security requirements are not very high, such as high-end hotels, office buildings, and other such occasions, it has already become a trend.

However, the speed of access card development has left everyone feeling incredible. In just five or six years, access cards have already been upgraded to 13.56KHz IC cards.

Yipin Dongfang uses IC cards. Compared to ID cards, although they can also be copied at will and their security is not high, they have high frequencies, good signal strength, sensitive response, and long reception distances. Opening doors is fast and stable, and virtual identity identification is easier to manage.

By the millennium, biometric identification appeared, which also completely overturned people's perceptions. One could achieve door-opening functions through facial scanning and fingerprints.

It's just that the facial scanning function wasn't stable at the beginning; the feature values of several photos taken of the same person within the same second were almost never one hundred percent identical.

The accuracy rate of the comparison algorithm was less than eighty percent, and it required a certain amount of time to identify, while also being very easily affected by light.

Therefore, the appearance of this thing looked very high-end and was also highly sought after, but because of its high price and various reasons, it didn't become as popular as quickly as ID cards and IC cards.

Zhou Andong has already had the research institute develop biometric access control. With a direction, developing that thing isn't difficult; what's difficult is the accuracy of the algorithm.

Anyway, Zhou Andong isn't in a hurry, and he hasn't set a time requirement. Whenever it's finished, it's finished.

Sun Ming looked at the access card in Dong Chang's hand, his eyes very bright.

"Manager Dong, does every resident have this kind of card?"

"Yes!" Dong Chang nodded: "Four per household, free of charge. But if lost, you have to spend money to buy one, five yuan each."

After entering the unit door, the noise was even louder, especially the sound of the electric hammer, which was very uncomfortable for the eardrums.

"Officer Sun, which floor do you prefer? Higher or lower?"