Why hasn't China Post closed down yet when its speed is so slow? Where is the strength of China Post that always gets scolded
#Summer Creative Competition#Many people say that China Post is one of the few national teams to be defeated by a mixed army, such as the three links and one delivery on the market and SF Express, which both have faster delivery speeds than Postal Service. Is Postal Service really so bad? Should it be eliminated?China Post is no worse than private express deliveryRegarding the issue of slow speed in China Post, I believe that we cannot compare it solely in terms of speed, but also in terms of price...
Solid state thermal transistor ultra high speed precise control of heat
Science and Technology Daily News (Reporter Zhang Mengran) - Researchers at the University of California, Los Angeles have launched the first stable all solid-state thermal transistor, which uses an electric field to control the thermal motion of semiconductor devices. According to a study published on November 3rd in the journal Science, the transistor has the highest speed and performance to date, and through atomic level design and molecular engineering, it can open up new fields of thermal management in computer chips...
It's no use cherishing memories. The withdrawal of six types of household appliances from the market has become a foregone conclusion. After seeing their shortcomings, I understand
Some things are eliminated and we want to say 'good', but some things are eliminated and we feel regretful.But nostalgia is also useless...
Another strange phenomenon in society: why are there more and more smoking hotels on the street when a large number of shops are closing down?
Now as long as you walk on the street, you will find that there are not as many pedestrians on the road as before, and there are many shops with their doors tightly closedTransfer for leaseThe brand of. Obviously, these shops have already closed down, and even if there are still many open doors, most of them areLow price sales and loss promotionThe state of being unable to sell is still struggling to support...
The Little Things on Earth are Online! Huawei Image Makes Another Big Picture
Chinese cinemas have over 80000 screens. When thousands of viewers enter the cinema, they immerse themselves in the huge screen in front of them for two hours, being attracted by various stories, moved by characters, and shocked by the themes expressed, which is the charm of movies...
The southernmost territory: Is the Zengmu Sands controlled by China? Is it possible to reclaim land from the sea?
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Wu Zunyou died of pancreatic cancer, as did Jobs, Pavarotti and other celebrities. pancreatic cancer was called "the king of cancer", with a five-year survival rate of only 7.20%
Replay suspend 00:07 / 00:09 direct seeding 00:00 Enter full screen 0 Click and hold to drag videos Wu Zunyou died of pancreatic cancer, as did Jobs, Pavarotti and other celebrities. pancreatic cancer was called "the king of cancer", with a five-year survival rate of only 7...
Shenzhou 16 failed to return? Netizens have noticed that it has rolled several times and dust is rising everywhere. What is the reason?
The return process of Shenzhou 16 has attracted a lot of attention and discussion, especially during the landing, there were some unusual situations, including dust rising and the return module rolling several times. But in fact, these situations do not mean that the mission has failed and the astronauts have safely returned...
After switching back to the wave wheel washing machine for half a month, I finally understand why my mother decided not to buy a drum
Mom, your washing machine is broken. Change the drumI don't want itYour pension is not low, why not switch to a better oneIt's nothing to do with money, I just want a wave wheelThis is a real conversation that happened at my house last year, when my mother clearly only wanted a wave wheel washing machine, but I only thought she was in love with money...
Here comes the 'Sky Taxi'! What does it look like? How to use it? Come and see
Recently, China has independently developed2-ton eVTOL (Electric Vertical Takeoff and Landing Vehicle)M1's first aircraft successfully completed test flight in ShanghaiConsidered as the future 'air taxi'EVTOL aircraftAllow a 2-3 hour driveShorten to around 30 minutesSome Shanghai netizens claim thatI finish work at 6pm,At 7 o'clock, go to Yangcheng Lake to eat hairy crabs.This originally sounded like the situation in science fiction elementary school,It is expected to become a reality with the help of 'aerial taxis'So, what exactly does it look like?How to use it again?The 'air taxi' looks like thisThis first aircraft adopts a composite wing configuration schemeWith 20 rotorsThis machine is equipped with an electric systemFlight control systems, composite materialsLocalization of all three core linksHow do I use 'aerial taxi'?This type of aircraftCan take off and land vertically like a helicopterMaximum load 500 kgCan accommodate 5 peopleCruise speed 200 km/hThe designed range is 250 kilometersIn the future, it will mainly be used to solve problems within citiesShort distance air travel demand between citiesAllow a 2-3 hour driveShorten to around 30 minutesit is reportedThis machine has low requirements for the venueCompared to helicoptersIts safety is higherCan achieve the safety level of civil aviation aircraftAnd due to the use of electric driveCan achieve low noise and zero carbon emissionsHow is the current airworthiness promotion?Previously, Yufeng Future was established in September 2022Officially released to the publicManned eVTOLM1 Design SchemeAt the end of March 2023The first M1 aircraft was officially taken offline from the factoryAfter six months of testing on various systemsAnd full machine level testing optimizationM1 in September 2023Officially starting the first round of flight testingRapid progress in over 30 daysComplete full power ground testingElectromagnetic compatibility testingFull power aerial testingPneumatic servo elasticity testPower system failure mode testingHover test flight, low-speed flight test flight, etcMultiple major testing projects and successful first flight(Economic Reference News)...
Why would a spacecraft go through the atmosphere at high speed, regardless of the cost of burning, when it returns to Earth?
Crossing the black barrier is the most dangerous moment for astronauts returning to Earth, and this area is also known as the black barrier. During this process, the exterior of the return capsule will be burned red due to high-speed friction...
India investigates whether opposition party figures' iPhones have been attacked by 'hackers'
Indian Minister of Railways, Communications, Electronics and Information Technology Ashvini Vaishnau said on the 2nd that India's cybersecurity department is investigating complaints from senior opposition figures that some of their phones have been "hacked". These people received warning messages from Apple in the United States...