The biggest gap between physical and chemical teaching and liberal arts teaching is “physics and chemistry teaching, which can get the most intuitive observation and feelings from the laboratory. However, our liberal arts teaching is much poorer. History teaching cannot return to the past; The field of vision for teaching observation is mostly global. Both of these cannot form a 'lab' teaching. Well-known teachers in Haidian Experimental Middle School have thus evaluated the differences in the teaching of science and liberal arts.
“The size of Iceland on a plane projection map looks similar to that of Africa. But how can an island compare to a whole continent?†A geography teacher at Haidian Experimental Middle School pointed out that traditional geography teaches various maps and globes. Procurement complete dozens of sets, application is very inconvenient. And in the teaching process, there will be many "misunderstandings". The use of Yufei Educational Multimedia Curtain Demonstration Instrument can be used as a demonstration and the content of the demonstration instrument can be freely changed as the curriculum advances. It can also simulate dynamic processes such as wind band and ocean current, greatly accelerating students’ knowledge of geography knowledge. speed.
In this regard, depending on Merlot, the space-time bottleneck of traditional liberal arts teaching can already be broken through by “digital audiovisual†technology—the experimental means owned by science, and liberal arts can also be realized with digital simulation. At present, Haofei Education regards “the biggest blind spot in global experimental teaching: geographical and historical digital experience systems†as a breakthrough point in the market, which is not only a reflection of corporate value, but also a direct result of modern, sophisticated technology directly driving the value of social civilization. People in the industry believe that every school in the future should establish a "digital classroom." "The quality education and burden reduction that we understand is more about improving teaching efficiency than compressing teaching duration and content. If we achieve this ideal, it will be a matter of rewriting the destiny of many people." .
Through the long river of history, the ultimate reflection on the origin and destination of Xixian New District, a state-level new district located in the middle of the mother mainland, is the first national new district with the theme of “innovative urban developmentâ€. However, the new district is not new or new. Because this fertile land was once the seat of the Zhou and Han capitals, it has a history of nearly three thousand years of building a city, and once was the largest city and economic circle in the world. These cultural and historical impressions and sites of historical cultural relics are the basis for urban planning in the New District, spiritual food, and the soul of the soul.
According to Merlot Display Technology, a total of more than 50 sets of SLPL technology laser display systems have been invested, creating an immersive multi-diamond, multi-faceted folding display system. The close integration of history and reality allows viewers to cross the long river of history, from ancient times to the future, and from the future back to ancient times, to perceive the veins and charm of this fertile land with a “God†perspective that transcends time and space.
“Some history has left only words and some beautiful existences. For example, mural paintings in the Mogao Grottoes are becoming abstract memories in an irreversible way. However, these are the treasure-houses of our civilization and culture. Laser display and virtual reality, augmented reality technology The combination just provided us with a plan to interpret history and 'save' history, depending on what Merlot said. Urban planning museums, museums, art galleries, heritage sites, and so on, can all use this new technology to achieve "time and space through."
What is the greatest significance of viewing a laser display system as a modern display of certain "perceived" technologies? Entertainment is an important part of it, but it is not the most socially significant part. According to Merlot, the laser display system is more of a "perceived" technology. It is like an extension of human thinking, memory, and vision. Based on this kind of thinking, Melody pointed out that the innovative nature of laser display application is "creating a scene."
In this way of thinking, Merlot has opened up a new application model of the teaching market—a new “digital geography, digital history, digital Chineseology†classroom besides multimedia teaching. Feifei Education believes that through modern display engineering, the liberal arts that cannot conduct experimental teaching will be brought into the “digital experiment†to perceive the world, and “the effect of science knowledge that cannot be experimented in the classroom†will also be brought into the “digital experiment†perceptual world, and they are eager to become the next generation. One of the core products of teaching modern engineering. At the same time, in the area of ​​large-area engineering display, as the United States and music proposed "digital environment and digital perception" concept. Including in the traditional stage applications, emerging wedding scenery applications, planetariums, planning hall applications, laser display products create a virtual world that is “true and falseâ€.
"What is the highest realm of the display product? It is not the effect of the picture itself, but the fusion of 'true or false'." The future of the display industry belongs to virtual reality, augmented reality, and mixed reality. It creates new reality and changes reality through display. On this road, laser display is very promising.
“Technology innovation and creation are the foundation, product realization is the key, and scene creation is ground. Competition in the laser display industry has demonstrated the cooperation of this trilogyâ€. Recognizing this industry trend, we believe that Merlot has preemptively occupied the market's high point of "scene creation" competition. This is not to open a "new door" laser display industry growth and development, but also to the United States as the laser display business, to the answer to the "human exploration limit" and another new milestone.
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RJ45 port editing
1. Origin:
2. The name RJ stands for the registered jack and is the USOC (universal service ordering codes) code of bell system. USOC is a series of registered sockets and their wiring mode, which are developed by bell system to connect the user's equipment to the public network. FCC regulations control the application of this purpose. The FCC (Federal Communications Commission) issued a document on behalf of the U.S. government to specify RJ11.
3. RJ11 is the common name of the connector developed by Western Electric Co. Its shape is defined as a 6-pin connecting device. Originally called wexw, where x means "active", contact or needle. For example, we6w has all six contacts, numbered from 1 to 6. The we4w interface only uses four pins, the outermost two contacts (1 and 6) are not used, and we2w only uses the middle two pins. For RJ11, the information source is contradictory. It can be a 2 or 4-core 6-pin connector. What's more confusing is that RJ11 is not only used to represent the 6-pin connector, it also refers to the 4-pin version.
4. RJ45 and RJ11: different standards, different sizes
5. Due to the different sizes of the two (RJ11 is 4 or 6-pin, RJ45 is an 8-pin connection device), it is obvious that the RJ45 plug cannot be inserted into the RJ11 socket. However, it is physically feasible (RJ11 plug is smaller than RJ45 jack), which makes people think that they should or can work together. It's not. It is strongly recommended not to use RJ11 plug for RJ45 socket.
â’ because RJ11 is not internationally standardized, its size, insertion force, insertion angle, etc. are not in accordance with the international standard connector design requirements, so interoperability cannot be guaranteed. They even cause damage to both. Since the RJ11 plug is smaller than the RJ45 socket, the plastic parts on both sides of the plug will damage the metal pin of the inserted socket.
RJ - 45 port is our most common port, it is our common twisted pair Ethernet port
Because twisted pair is mainly used as transmission medium in Fast Ethernet, RJ-45 port can be divided into 10Base-T network RJ-45 port and 100base TX network RJ-45 port.
Among them, the RJ-45 port of 10Base-T network is usually identified as "eth" in the router, while the RJ-45 port of 100base TX network is usually marked as "10 / 100btx". This is mainly due to the fact that most products of Fast Ethernet router still adopt 10 / 100Mbps bandwidth adaptive.
The left figure shows the RJ-45 port of 10Base-T network, while the right figure shows the RJ-45 port of 10 / 100base-tx network. In fact, the two RJ-45 ports are exactly the same in terms of the port itself, but the corresponding network circuit structure in the ports is different, so they can not be connected casually.
Definition of RJ45 interface pin signal
Ethernet 10 / 100Base-T interface:
1 TX + tranceive data +
2 TX - tranceive data -
3 RX + receive data +
4 N / C not connected
5 N / C not connected
6 RX - receive data
7 n / C not connected
8 N / C not connected
Ethernet 100base-t4 interface:
1 TX_ D1 + tranceive data +
2 TX_ D1 - tranceive data
3 RX_ D2 + receive data +
4 BI_ D3 + bi directional data +
5 BI_ D3 bi directional data
6 RX_ D2 - receive data
7 BI_ D4 + bi directional data +
8 BI_ D4 bi directional data
Note: RJ45 interface adopts differential transmission mode, TX + and TX - are a pair of twisted pair, which can reduce interference when twisted together.
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