The fragrance of grass and flowers in the mountains

The cool breeze brushed my ears

Grassland on the Fengning Dam

It still smells cool in the summer sun

Set up the tent and lay the floor mats, and on the grassland under the sun, it seems like you are in Switzerland

In the natural grassland closest to Beijing, the average temperature in summer is only 24 degrees. Driving to Fengning grassland with my sisters, the refreshing breeze brings a cool feeling, which makes people feel relaxed. The car slowly drove into the first day road in northern Beijing. On the continuous hillside, the white windmill slowly turned, conveying the romance and affection from the depths of the grassland. On the Fengning Bashang grassland, which runs through the first day road in northern Beijing, there are several independent scenic spots such as Qiansongba National Forest Park, Liushugou Savanna and 18 Flower Sea. They are interdependent and watch each other, but they also have different styles. 18 The sea of ​​flowers is composed of three parts: Jinlian Lake, Beauty Valley, and Botanical Garden. It is full of wild and fairy-like atmosphere ~ and Liushugou savanna, on the grassland surrounding the mountain, is a large sea of ​​flowers and occasional streams passing by. , Constitute a beautiful picture like Switzerland. It is full of refreshing colors. Flowers are vying for beauty, cows are grazing in the distance, and dogs are running on the prairie ~ The plan to escape from the city starts here! The cool wind strokes poppies in the mountains and plains. They swing their waists in the wind and provide a sweet source for bees. Wearing a French-style lavender print skirt, it happens to be a rivalry with the grass and yellow poppies. This color collision is the two poles of the chromatogram, with the strongest chromatic aberration, but also the most complementary. The valley of Liushugou is full of lilac trees, river willows, stalks, and diced trees. On both sides of the mountains, there are natural birch forests, artificially planted spruce, mongolica, larch and large-leaf poplars, which contrast with each other. Composition of forest pictures in different tones. The trees here are young and tall, the bright sun shines through the leaves in the jungle, and the refreshing wind brings the taste of summer. This is what the healing forest is talking about. The grassland is surrounded by mountains and trees, and there are gorgeous summer flowers blooming on the grassland. Pieces of the grassland merge into a sea of ​​flowers. In the distance, there are streams and rivers flowing slowly. The breeze brings the fragrance of flowers and vanilla, and it also brings the fragrance of nature. The air is full of sweetness. It’s a great idea to spend an afternoon camping here with my sisters. In the fragrance of nature, we also feel refreshed. The specially selected pink tents, floor mats, accessories, and outfits are all in place, so that they can give off the most dazzling light in the natural environment of Fengning grassland. By chance, I also came across a self-driving tourist from Beijing with his own dog. In such a vast world, Mao’s child became confused for a while, and when he got out of the car, he suffered from choice anxiety, and he didn’t know which direction he should run. So he rolled in the grass, and ran wildly on the sky, like a cute child. In fact, Liushugou is not just this river valley, there are also many valleys on the east and west sides. From a distance, it looks like a magical forest, lush and lush and fascinating. We took out the prepared bluetooth speakers and played the most beautiful melody. Let the music flow slowly over the tips of the grass and flowers with the sound of the wind. The Kitty cat doll brought by my girlfriend seems to have become particularly agile. Lying on the floor mat, one person holding a kitty, looking at the endless white clouds in the sky in a daze. This moment of complete emptiness is really a great enjoyment and satisfaction of not changing money. The large sea of ​​flowers on the grassland is fascinating, and camping on the Liushugou grassland in the midsummer, the summer heat is relieved, and the heart is refreshed, truly returning to the embrace of nature. Because it is connected to the virgin forest below the dam, in the ecologically excellent Liushugou, some wild animals are often encountered. Of course, this is only an exclusive courtesy of the locals. As self-driving tourists, the most common ones are probably cows and horses walking in groups on the grass to graze. They are the masters and souls of this place. Occasionally, you will see wild ducks, pheasants, sand spotted chickens, and of course a wide variety of Chinese herbal medicines. This camping with the sisters, in the natural background of Liushugou, constitutes a perfect picture in our imagination. With the decoration of wild daisies and poppies, it is even more unforgettable. Colorful summer flowers compete here, with different levels of yellow-green and pink-purple, forming a beautiful midsummer picture~ Such a sweet and dreamy fairy tale journey. Definitely better than Switzerland, better than Switzerland. ——————— ———————— Original text/Coco Hu Bo, please do not reprint without authorization Thanks to Coco for the character shooting: @衣鱼911 @还七月@vivian靓雅雅@9Y品 Coco Hu Bo Global traveler, well-known travel self-media, KOL, photographer, travel columnist, senior travel media person, Sina Weibo signed travel blogger, Sohu gold author, Japan Okinawa travel ambassador, Italian wine promotion ambassador, “The Way of Wine” Producer of a series of travel video programs. His works are often seen in travel and lifestyle magazines such as “HNA”, “The Cloud”, “Travel World”, “Tide Star”, etc

This is reminiscent of the Kuaishou anchor who overturned another car with goods some time ago. According to the feedback from fans, the mobile phone they bought in the live broadcast room of a certain Kuaishou broadcaster may be a fake. The declared storage and memory are too far from the actual application, and the hardware configuration is also severely shrunk, and even the network access permission is arrogant. Soon, the Kuaishou platform came out to investigate the results, and users who bought this phone will receive 9 times the compensation, which allowed the incident to calm down.
I thought that this matter would come to an end at this point, but I didn’t expect that there were new developments recently. It turned out that there was not only one mobile phone that had a problem in the live broadcast room of the anchor. Now users of other mobile phones have also begun to demand compensation from the platform. If the principle of non-discrimination is followed, Kuaishou will also make a false one-for-nine decision for this. It means that the potential loss of Kuaishou will be as high as billions.
But what is surprising is that users who have purchased other mobile phones have encountered trouble when seeking compensation. According to media reports,

In the process of users seeking 9 times compensation, Kuaishou customer service said that they had not been notified by the platform that other mobile phones had to pay 9 times. As for the content of the follow-up compensation, the customer service only said to give feedback to the user, but the user was asked to fill in the content of the compensation for 3 times. Seeing the response given by Kuaishou, the first reaction of most people must be that Kuaishou began to regret it. Obviously it is the same live broadcast room and sold in the same period of time. Why does one of the mobile phones that have been determined to be fake can get 9 times the compensation, while the other phones have been unable to determine whether it is a fake or not? If it’s not a fake product, why should Kuaishou give the user a fake one and lose three? Especially when talking about feedback, but there is no feedback result, such an approach is really too perfunctory, this is not an attitude to solve the problem. To be honest, the 9 times compensation was the original promise of Kuaishou, but now the 9 times compensation has quietly shrunk to 3 times. We have to ask why? Some netizens speculated that the original 9 times compensation was to calm the development of the situation. If the compensation were all 9 times, the loss of Kuaishou would be too great. Another voice pointed out that Kuaishou has no way to compensate now. The previous Simba incident is still vivid. If you pay 9 times the compensation at this moment, it will cause irreparable loss to the business reputation of Kuaishou. But having said that, the 9 times compensation that Kuaishou himself said has quietly become 3 times. There is another question that makes people very curious, and that is, in the face of subsequent compensation, can Kuaishou still be able to handle it? You know, if you calculate according to the original sales, nearly half of the shipments will cause Kuaishou to lose more than 4 billion. And the head anchors made mistakes one after another, and even the credibility that Kuaishou e-commerce had just accumulated collapsed. Now Kuaishou is in a dilemma. Perhaps seeing the current situation, Kuaishou will regret the original decision, which is really a big talk. When expressing the attitude of correcting mistakes, I only wanted to reduce the heat of the incident, and hurriedly said too much, so that now I can only use “delaying tactics.” But on the other hand, as a manager, if even the anchor of his own platform is not well managed, and he even wants to go back in the face of the original promise, this is not a devastating blow to the business reputation of Kuaishou. So, in your opinion, can these consumers get 9 times compensation in the end?

Sufficient operating time: In mobile applications, if the time limit is not a necessary part or key element of the activity, and does not cause the user to have a legal commitment or financial transaction, sufficient time should be left for the user’s operation, and the interface will not change before the user’s operation is completed. 3. Provide obvious prompt operation for the elderly. When users install mobile applications, they should provide significant guidance prompts for age-appropriate settings and common functions for the elderly. The homepage of the mobile application embedded with the old version interface must have a prominent entry, support switching to the old version, or give a noticeable switching prompt when entering it for the first time, and provide the “elder version” entry in the “Settings”. Mobile applications with search functions should use “elderly version” as the standard function name, and users can directly access it through the search function, and set aliases such as “family version”, “care version”, and “care version” as search keywords. 4. To improve the security of mobile phones, it will no longer be possible to insert advertisements and induce clicks on buttons. Prohibit ad plugins: Advertising content and plug-ins are strictly prohibited in the old version interface and the separate old version APP, and advertisements or temporary advertisement pop-up windows are not allowed to appear randomly. Prohibition of induced keys: There are no inducement buttons such as inducement downloading and inducement payment in the mobile application. To ensure the security of personal information of elderly users: No personal information processing that has nothing to do with the purpose of processing to protect the personal information security of elderly users. The above is part of the content of the policy. It can be said that it is closely related to our middle-aged and elderly people, and it is very beneficial. How do you feel about this? Welcome to vote. Wechat rules have been changed, only focusing on easy to lose contact with Beijing Auntie, you have to click watching and like, thank you. ComeSource: Economic Daily, Information and Communication Administration of the Ministry of Industry and Information Technology guess Why does Nie Haisheng, 57, insist on doing this despite the opposition of his relatives and friends?The truth was exposed and moved the Chinese you Retired people across the country must watch it! These 2 stories will let you see the truth about pensions! miss you 63-year-old Feng Gong’s private life exposed! Never thought that he was such a person! Look The Beijing pension plan is announced, the low-key is high-key, the high is low-key, and there is one point that retirees across the country envy! ↓↓↓ Click here for retired people to listen to thousands of lessons for free!

Last year, the XC60 became Volvo’s highest-selling model in China, accounting for 30% of the brand’s overall sales. Although it is not as good as BBA, it is already on par with Cadillac.

After entering 2021, the sales volume of Volvo XC60 has only increased. The sales volume in the first four months has reached 21,398, which is more than 14,664 of Cadillac XT5. So, can the new XC60 continue to expand its advantages and even pose a certain threat to BBA?

The appearance of the new XC60 is divided into two styles, sports version and luxury version. As a mid-term facelift, the appearance is not changed much, and the iconic “Thor’s Hammer” headlights and “Viking Tomahawk” rear taillights are still used.

The two styles are only different in the front grille and fog lamp area. The sports grille uses an octagonal lattice design, while the deluxe version uses a vertical bar design.

In the details, the new XC60 uses a brand-new 3D mirror style LOGO, the rear also uses a hidden exhaust design, which looks more textured and has a minimalist style.

In contrast, XT5 pays more attention to the sense of luxury, the visual pressure of the large-size net and the sharp body lines look thicker than the Volvo XC60.

In terms of size, the XT5 is slightly higher than the XC60 in terms of length and height, but the XC60 has certain advantages in the wheelbase, and the new XC60 has an increase of 20mm in length. In addition, the new XC60 will also provide a choice of brand-new style wheels, as well as three more personalized body colors for your choice of flashing silver gray, butterfly gray, and flashing silver.

As a luxury SUV, both cars are impeccable in terms of interiors. Compared with the classic American luxury of the XT5, the XC60’s interior has taken a “simple home” route. A large number of soft materials are wrapped and decorated with wood grain veneers. In addition, the new XC60 has changed from the original mechanical shift to electronic shift, and adopts a unique crystal style.

XC60 interior

As the focus of this upgrade, the car-machine system is fully based on the Android system this time. The standard 12.3-inch central control screen has built-in applications such as AutoNavi map and iFLYTEK’s voice control system. Compared with XT5’s CUE system, XC60 has more intelligent configurations including lane departure warning system, lane assist maintenance system, road traffic sign recognition system, fatigue driving, and steep slope descent. Obviously, XC60 will have more advantages in intelligence.

XC60 Interactive System

In terms of power configuration, both cars use 2.0T turbocharged engines, and the parameters are basically flat. Although the XC60 with B4 and B5 engines has no change in power value, it is still matched with an 8-speed automatic transmission and equipped with a four-wheel drive system. However, due to the addition of the 48V light mixing system, the fuel consumption has been reduced. The combined fuel consumption of the B4 engine version is 7L/100km, and the B5 engine version is 7.3L/100km.

XT5 interior

XC60 interior

But Cadillac’s Tripower variable valve management technology can bring a smoother and smoother driving experience. How to choose depends on your needs.

On the whole, the update of Volvo XC60 is more to maintain sales enthusiasm, and some minor repairs have been made on the basis of maintaining the original selling point. It seems that it is still difficult to chase BBA, but it does not seem to be difficult to maintain the advantage over XT5. .

Previously, Galaxy A52 and Galaxy A72 were expected to launch globally at the end of April. However, it has only appeared in Europe and some other markets, fortunately Vietnam. The Galaxy A series, which is Samsung’s flagship product line, brings huge revenue, but a global chip shortage could have a big impact on this model in the coming quarters. It is currently not clear whether other Samsung product lines or smartphones will be affected. Samsung will soon release a bunch of new devices, including the Galaxy S21 FE and Galaxy Z Fold 3, which will most likely also be affected by their launch dates or production. Qualcomm’s CEO recently stated that in the best-case scenario, the chip shortage will only last until the end of the year, but some say it could continue until 2023. According to Phonearena

UEH students gather and classify garbage before carrying it to destruction. The main goal of the project is to build a model of school without rubbish, apply a zero-garbage solution in school waste management, and prioritize the refusal – minimizing – reuse of single-use plastic products. The product is not required, or cannot be composted. The program will be implemented in the first phase from April to the end of October 2021 at UEH Campus – Nguyen Van Linh. With the concept “just recycling is not enough”, while recycling plastic is also causing many consequences for human health and the environment, the Vietnam Zero Waste Alliance (VZWA) * for that “Practice without rubbish” is the most sustainable solution and create a circular economy for society. In particular, schools play an important role in raising awareness of young people about environmental protection. This is the premise for the idea of ​​implementing UEH – Zero Waste Campus project. The project is part of a strategy to build a No Spam model in the community, as a pilot at the University of Economics, HCMC. Ho Chi Minh City – Nguyen Van Linh campus with cooperation, consultancy and technical support from the Vietnam Spam Free Alliance. The specific objective of the project is that at least 70% of the total post-project surveyed people understand what it means to be No Spam; the amount of general waste going to landfills decreased by about 40%; persistent waste (including disposable plastic, unnecessary products, organic composting) reduced by about 30%; Organic waste is processed to become compost, recycled waste is collected and taken to the recycling facility; Reducing the use of unnecessary, disposable or non-compostable plastic products. In order to realize action goals, City University of Economics. Ho Chi Minh City (UEH) and the Vietnam Spam Free Alliance signed a cooperation agreement (MOU). The signed content of the two parties aims to jointly design, consult and plan the UEH – Zero Waste Campus project, including the development of measures to manage and reduce waste in the school and campaigns. improve waste awareness, adopt a No-Garbage lifestyle and turn waste into a resource. UEH students in class Mr. Bui Quang Hung – UEH Vice Rector shared: “Towards the model of“ Green University ”, HCMC University of Economics. Ho Chi Minh is actively cooperating with the Vietnam No Trash Alliance in activities of managing, minimizing and turning waste into resources; communicating and implementing a roadmap to build the No-Garbage School. The project expects all staff, students and stakeholders at the University to increase awareness of waste issues, and understand and practice the “No Spam” lifestyle. Accordingly, the Vietnam Non-Garbage Alliance initially surveyed students’ perceptions, assessed the current situation of waste at UEH campus – Nguyen Van Linh and will continue to coordinate with the school to implement specific activities. project roadmap. Ms. Quach Thi Xuan, Coordinator of the Vietnam Spam Free Alliance said: “The Zero Waste Campus project marks a new turning point in the partnership between UEH and the Vietnam Spam Free Alliance. This is a “long-term” program with special meaning to raise awareness of environmental protection with practical actions “. The project helps to limit plastic waste, protects the health of students and staff from the harmful effects of plastic waste, and at the same time contributes to building UEH – Nguyen Van Linh Campus in the direction of “Green University” – Green School , Environmental friendliness.

The 2021 iPad Pro is equipped with M1 chip as standard, with a storage combination of up to 16+2TB, and it is completely a MacBook Air in terms of performance and storage. You are not mistaken. This should be the first time Apple has marked the running memory of the iPad. The reason is simple: iPad Pro is divided into 8GB and 16GB versions. The 128GB, 256GB and 512GB versions are 8GB and the 1TB and 2TB versions are 16GB storage, I have to admit that Cook is still very smart.

The M1 chip and 16GB large storage are directly used on the iPad Pro. This fact shows one thing: iPad Pro has evolved from a large iPhone to a small Mac. If you still feel untrustworthy, then give a few examples: the latest iPad Air 4 uses a performance combination of A12+4GB storage, and the iPad Pro2020 uses a combination of A12Z+6GB storage. Apple, which is so stingy in storage, uses M1 chips, 8GB and 16GB storage in the new iPad Pro. Do you think this is reasonable?

The current iPad Pro is ready for everything but the wind, and this wind is the WWDC Developer Conference from June 7th to 11th. Not surprisingly, the new iPad Pro will become a combination of iPad and Mac. This is the main selling point of the new iPad Pro. Although the mini-LED screen is a highlight of the iPad Pro, the biggest selling point is still the M1 chip and the upcoming Mac system. Of course, if you have higher requirements for screen size and quality, the 12.9-inch iPad Pro is definitely a better choice.

Regarding the purchase of iPad Pro, Qi Ji’s idea is this: Even if the budget is limited, it is not recommended to buy the 128GB version, at least the 256GB version starts. For those who want to replace the Mac as a productivity tool, except for text workers, the flagship recommends 1TB to start. As for buying it back as iQiyi, Qi Ji’s suggestion is to buy it casually if you have money. If you are not in a hurry, you can wait for the WWDC Developers Conference in June to see the future plan of the iPad Pro before buying it with more confidence.

Qi Yan Ji Yu:

For the 2021 iPad Pro series, Qi Ji’s idea is this: Android tablets are too difficult, and have not caught up with the iPad Air level. iPad Pro has already set off for the Mac. Compared with the iPad, the biggest advantage of the Android tablet may be the interconnection with its own mobile phone and WIN computer. With the release of the iPad Pro, Apple has not only taken another step towards unification, but also further announced the status of the iPad in high-end tablets. As a fan of the iPad mini, Qi Ji has already begun to have the urge to buy an 11-inch iPad Pro. These are Qi Ji’s views on the new iPad Pro. What are your thoughts and expectations?

I am Qi Ji, and the above are Qi Ji’s thoughts. It is not easy to create codewords. If you like, remember to follow Qi Ji’s ideas, you can also like, forward and comment. More interesting digital information is waiting for you to chat. The picture comes from the Internet, invaded and deleted!

Smart things (public account: zhidxcom)

Author |Xiong Dabao

Edit |Li Shuiqing

Smart Things reported on April 15 that Google recently announced the launch of AR indoor navigation function, which provides users with route guidance in scenarios such as airports, transit stations and shopping centers, and helps users find the nearest elevators and escalators, boarding gates, and platforms , Baggage claim, boarding counter, ticket office, restroom, ATM, etc.

This AR indoor navigation technology breaks through the limitations of traditional indoor navigation of flatness and low legibility, enhances image accuracy and data versatility, and not only brings users a novel and personalized experience of indoor navigation, but also provides offline navigation. Industries such as retail bring potential application value.

This article will analyze AR indoor navigation from three aspects: AR’s breakthrough in the legibility of indoor navigation maps, the transformation of AR navigation from outdoor to indoor, and the development prospects of AR indoor navigation.

1. AR breakthrough in indoor navigation: two-dimensional leap to three-dimensional, and map legibility is improved

Based on AR indoor navigation, the user’s own location and floor can be identified, and then AR overlay guidance such as arrows and information markers can be used to reach the destination.

Although these instructions seem simple, they cannot be achieved by previous indoor navigation methods such as indoor maps, Bluetooth beacon positioning, Wi-Fi signal positioning, and GPS positioning.

Indoor map is the most traditional one, such as the retrieval map of the library bookshelf. This method collects a large amount of data and makes an index map, and readers can navigate and find through the exclusive number of each book. However, the production and expression of maps for large-scale indoor environments is costly, and its universality is not high.

The Bluetooth beacon location method is more popular. Relying on Bluetooth, the smart phone software can roughly get the user’s location on the map for route planning and navigation. However, due to the short transmission distance of Bluetooth, it will have extremely high deployment and maintenance costs in large indoor environments such as shopping malls and office buildings.

Another solution is to locate and navigate based on Wi-Fi signals. However, due to the complexity of the indoor environment, Wi-Fi signals are easily changed by environmental changes, so maintenance costs are still high, and accuracy is also restricted by factors such as Wi-Fi router deployment density, environmental stability, and training duration.

Although the GPS positioning method is widely used, it has poor signal penetration and low positioning accuracy. It is only suitable for two-dimensional planes. It can determine the approximate location of the user but cannot determine the direction. It cannot play a role in large-scale buildings.

▲The GPS signal bounces off the facade of the building

The AR indoor navigation launched by Google this time is equipped with a new visual positioning system (Visual Positioning System; VPS), which can make up for the deficiencies of the above methods.

Google AR indoor navigation function (Indoor Live View) relies on VPS technology to determine the user’s indoor location, and combines the virtual route with the actual indoor scene through visual processing.

The visual positioning system VPS is different from GPS. It does not rely on signals for positioning, but on images.

First, engineers can create localized maps through VPS. This method is called simultaneous localization and mapping (SLAM). By taking a series of images with known locations and analyzing visual features, VPS can create maps and establish fast search indexes, such as buildings, bridges, etc.

Secondly, when the user needs indoor navigation and positioning, the VPS will match the camera lens view with the VPS index view, and use the mobile phone’s built-in inertial measurement unit (IMU) data such as the camera, gyroscope, accelerator, and gravity sensor to use motion Artificial intelligence algorithms such as tracking and environmental perception are compared and analyzed to determine the location and direction of the mobile phone user relative to the real world.

Finally, in terms of orientation presentation, VPS can superimpose label effects such as guidance arrows and subtitle information onto the real images collected by the camera in real time, and rely on light estimation technology to better integrate virtual content into the real world. The light estimation technology allows the mobile phone camera to perceive the current environment’s lighting conditions and perform color correction on the virtual image, thereby enhancing the sense of reality when the virtual and real images are combined.

2. The indoor transformation of AR navigation: the improvement of image accuracy and data versatility

Since 2019, Google has launched the AR navigation function (Live View). Relying on the VPS visual positioning system and Google Street View gallery, it helps users to obtain accurate navigation routes outdoors. In subsequent updates, users can also identify surrounding landmarks through AR navigation, allowing users to know their location in the city more clearly.

How difficult is it to go from outdoor navigation to indoor navigation?

Large-scale indoor scenes such as exhibition halls, museums, shopping malls, and transportation hubs are complex and large in scale, and there are many areas of untextured space and visual ambiguity. The collection, production and expression of map data is a major difficulty. At the same time, with changes in lighting and viewpoints, it is also a challenge for users to accurately and quickly relocate. Google has many technological breakthroughs.

The first technological breakthrough is the improvement of image accuracy. More than 10 years ago, Google began to introduce street view maps, where users can have a “human eye view” map browsing experience, but at first these street view data were not localized. Image data localization can add more annotative label information to pictures of objects, locations, etc., to help users quickly understand.

In order to use VPS to achieve global localization, Google uses information collected and tested from more than 93 countries around the world to connect it with Street View data. This rich data set provides trillions of powerful reference points through triangulation to help people more accurately determine the location of devices and guide people to their destinations.

▲Google triangulation method to accurately locate buildings

Although this method works well in theory, there are still challenges in practice. The problem is that the real-time image of the mobile phone may be different from the scene when the street view is collected during localization. For example, the details of trees will change with the seasons, or even with the magnitude of the wind, and a good match cannot be obtained.

In order to break through this technology, Google uses machine learning to filter images of temporary and changeable things in the scene, focusing on images of fixed structures in the scene. This technological advancement also makes today’s AR indoor navigation more accurate.

Another technological breakthrough is the rapid acquisition of data.

Airports, shopping malls, hospitals… The numerous buildings mean that Google needs to shoot a large number of indoor images of public scenes. In the previous outdoor street view database construction, Google has gradually improved its image collection methods from early street view vehicles, street view tricycles, street view trolleys, and then to the convenient and lightweight street view backpack (Trekker).

▲The old street view backpack on the left and the new one on the right

Below the street view backpack is the main body of the backpack, and the top is a spherical device equipped with 15 5 million pixel cameras. With this kind of backpack, image collectors can take pictures of corners where cars can’t get in.

As a result, in the image collection of indoor public scenes, Google can use its own street view backpack to send a large number of contractors through an airport, station or shopping mall in a certain place to quickly capture VPS data.

Google said that AR indoor navigation will first be launched in some shopping malls in Chicago, Long Island, New York, Los Angeles, Newark, New Jersey, San Francisco, San Jose, California and Seattle. In the coming months, it will also be launched at airports, shopping malls and transit stations in Tokyo and Zurich.

However, there are still some weak links in the development of AR indoor navigation, such as focusing on product development and landing but insufficient understanding of users and functional requirements, map information expression pursuing visualization and realistic effects but lacking purpose and rationality, and related hardware for presentation applications. Development is lagging behind and so on.

3. The development prospects of AR indoor navigation: scene expansion, use increase, equipment extension

At present, AR indoor navigation technology is accelerating its development. In addition to Google, domestic Baidu and AutoNavi are also exploring technology research and development and application scenarios.

Take Baidu as an example:

In November 2016, Baidu launched the AR walking navigation function. The navigation interface includes elements such as compass, route, turn indicator, way point and destination bubble, roller guidance enhancement, route overview, etc., with voice reminders to enhance the user’s walking navigation experience. In April 2017, Baidu added “Tutu”, an AR navigation cartoon character, to enhance the fun of AR guidance through big-eyed cute objects. In December 2020, Baidu Maps and Baidu Brain DuMix AR-visual positioning service platform launched the AR indoor navigation function-AI indoor communication.

AI indoor communication provides users with high-precision 6DoF positioning capabilities through visual positioning and augmenting service (VPAS). VPAS technology uses image-based 3D reconstruction technology to construct high-precision geometric maps of shopping malls, and then uses scene understanding algorithms and 3D vision positioning algorithms to calculate the user’s accurate location in real time. The actual position accuracy can reach 1 meter in the actual complex environment. Currently, scenes such as Beijing Qinghe Wanxianghui, Beijing Shuang’an Shopping Center, and Shanghai 2049 Emerald Park Shopping Center have been launched. At the same time, the technology can also be used in scenarios such as industrial inspections and logistics sorting.

Although AutoNavi and Sogou are relatively mature in outdoor walking AR navigation and in-vehicle navigation technology, they have not yet found their involvement in AR indoor navigation.

In addition to major map factories, SenseTime is also exploring AR indoor navigation. The SenseMARS Mars Mixed Reality Platform of SenseMARS, jointly built by Zhejiang University-Shangtang Technology 3D Vision Joint Laboratory and SenseTime Product Team, uses sparse point cloud map technology to reconstruct high-precision 3D maps, and calculates the current device’s 6DoF pose through IMU sensors. , Combined with SLAM technology to achieve indoor accurate positioning and AR navigation.

In the future, relying on the development of AI and IoT technologies, AR indoor navigation will allow users to see the digital attributes of the physical space, such as store virtual signs, promotional information, number of people in the mall, store traffic and other real-time information. Users can perceive in real time whether restaurants need to queue up and which products are on sale in trendy stores through their mobile phones. At the same time, combined with user portraits, AR indoor navigation will bring users a personalized offline scene experience. In terms of AR presentation, indoor navigation devices will also be expanded from mobile phones to AR glasses, AR headsets and other hardware to solve the dizziness and eye fatigue caused by mobile phones displaying AR maps for users.

It is worth mentioning that the report “Virtual (Augmented) Reality White Paper 2021” of the China Academy of Information and Communications Technology stated that AR relying on Inside-out technology is becoming more mature, and tracking and positioning will present integrated vision cameras, IMU inertial devices, depth cameras, event cameras, etc. The development trend of multi-sensor fusion. AR indoor navigation will develop well with the joint participation of the industry and academia.

Conclusion: AR indoor navigationWill become a new trend in the development of the industry

In terms of the manifestation of maps, AR technology has unparalleled advantages in the integration of people, maps, and the environment. Therefore, when Google launches AR indoor navigation, to a certain extent, it may set off a new trend in the development of AR indoor navigation at home and abroad.

It can be seen from the layout of big map manufacturers such as Baidu, AutoNavi, and Sogou that Baidu is one step ahead, launching AR indoor navigation functions in some shopping malls in Beijing, Shanghai, Guizhou, Langfang and other places, and will continue to make efforts in this field in the future. . Gaode Maps followed closely, and has upgraded the AR walking navigation function this year, and may soon enter the exploration of indoor scenes.

In the current industrial Internet era, AR indoor navigation will, with the support of AI and IoT technologies, activate the space utilization rate of large indoor scenes, broaden industry boundaries, and bring more possibilities to many smart industries. We look forward to the full coverage of all indoor public scenes in the world by AR navigation in the future.

source:Ars Technica, Google Blog, Code Swift,CNKI, Baidu

An Thoi port is currently promoting about 17% of its design capacity

Mining right auction

An Thoi Port is a seaport invested by the State with a total cost of 128 billion VND with a design capacity of 280,000 tons of cargo / year, 440,000 passengers / year. At the time the project was put into operation (2012), An Thoi is the main port (main port) and the only port in Phu Quoc that can receive ships of up to 3,000 DWT.

Previously, in January 2014, the Vietnam Maritime Administration gave a consortium of investors, Saigon Transport Services Joint Stock Company – Hiep Phuoc Maritime and Development Investment Joint Stock Company (TRANACO Joint Stock Company – HPI) leases the infrastructure of An Thoi port with the lease period from 2014 to 2043. These two investors have established An Thoi Port Investment and Operation Joint Stock Company to execute the contract with the Department. Vietnam Maritime. However, during the implementation of the Contract, due to a number of reasons from the lessee, the Vietnam Maritime Administration unilaterally terminated the above-mentioned Contract on January 1, 2021.

It should be added that the leasing of maritime infrastructure has been implemented quite effectively by the Ministry of Transport – Transport and the Vietnam Maritime Administration. Since 2004 until now, there have been 4 leases of marine infrastructure invested with state budget funds, with the total rental paid to the state budget up to 1,480 billion VND. .

“The contract no.03 for renting An Thoi port was unilaterally terminated ahead of time because the internal investor consortium had many disagreements, leading to the incorrect payment of rent to the State on time. The operation of An Thoi port in the form of leasing still brings efficiency to the State ”, Mr. Luu Quang Lam, Chairman of the Board of Directors of An Thoi Seaport Investment and Exploitation Joint Stock Company affirmed.

According to Mr. Nguyen Nhat, Deputy Minister of Transport – Transport, to continue to select the lessee to operate An Thoi port according to the provisions of Decree No. 43/2018 / ND-CP dated March 12, 2018 of the Government, The Ministry of Transport has instructed the Vietnam Maritime Administration (the unit assigned to manage assets) to develop the Scheme.

“Up to now, the Scheme’s dossier has been completed and valid according to regulations. The fact that the Ministry of Transport and Transport consulted the Ministry of Finance – the public property management agency – is to comply with the provisions of Decree No. 43/2018 / ND-CP dated March 12, 2018 of the management, use and exploitation of maritime infrastructure assets, ”said Mr. Nhat.

Potential risks

According to the proposal of the Vietnam Maritime Administration, the entire maritime infrastructure of An Thoi port will continue to be leased for about 42 years from the time of signing the lease contract (expected from 2021). by 2063 (according to the time of use of the property).

The starting price for the rental auction of An Thoi port infrastructure is about 195 billion VND, determined by two items: fixed collection price worth 160 billion VND (residual value of the property; service costs annual asset management and exploitation of the lessor; cost of project formulation, auction organization) and the change in price of VND 35 billion, based on the lessee’s revenue from exploiting profit.

Representative of the Vietnam Maritime Administration said that this starting price is close to the developments of An Thoi port in recent times. In fact, after 7 years of leasing, it shows that the output of goods through the port only reached an average of 17% of the design capacity.

The main reason is that goods transported to Phu Quoc Island are mainly construction materials for civil construction works, goods related to people. Because it is located in the southern part of the island, far from projects and works under construction, if the cargo is unloaded at An Thoi port, it will take a long road transport process, but the road is narrow, through the residential market small bridges, bridges, low payloads, not suitable for the transportation of heavy and bulky goods.

“That is not to mention, Phu Quoc currently has many temporary ports and inland waterway ports, scattered near the construction works around the island, with cheap rates, quite convenient for loading and unloading goods. The contractor will definitely have experience and a stable source of goods, ”said the leader of the Vietnam Maritime Administration.

An Thoi Port Investment and Operation Joint Stock Company, Phu Quoc Sun Company Limited and some local investors are very interested in participating in leasing the right to operate An Thoi port in the case of the Scheme. approved by competent authorities.