首页 > >
Important European night for both Madrid clubs******
MADRID, Nov. 2 (Xinhua) -- Real Madrid will look to take an important step towards assuring their place in the last 16 of the Champions League when they entertain Shakhtar Donetsk on Wednesday night.。
Although the side from Ukraine twice defeated Real Madrid in last season's competition, Real Madrid beat them 5-0 away from home two weeks ago and everything points to Carlo Ancelotti's men claiming another three points.。
Ancelotti decided to rest striker Karim Benzema for the weekend win away to Elche and the French forward should return against Shakhtar, while Ancelotti will probably make some changes to his starting 11 with Eduardo Camavigna perhaps in line for a start along with Ferland Mendy and Marcos Asensio.。
There will be attention focused on whether Eden Hazard will start after yet another brief substitute appearance at the weekend implied he remains out of favor.。
Mariano Diaz will probably miss out after receiving a facial injury in Elche, while Rodrygo is sidelined after suffering a muscle problem in the same game.。
Wednesday will also see Atletico Madrid travel to Anfield to play Liverpool in a key game for both sides. A point for Liverpool would book their place in the knockout stages, while Atletico's current position in the group with four points from three games means they have to get something from the match.。
Liverpool won a thrilling game in Madrid a fortnight ago and Atletico will be without Antoine Griezmann through suspension after he was sent off in that game. Atletico also travel without Stefan Savic, Marcos Llorente, Geoffrey Kondogbia and Thomas Lemar through injury, but will be boosted by the improved display that saw them win 3-0 at home to Betis on Saturday.。
Atletico won in the knockout stage in Anfield two years ago in a game that will be remembered for its role in helping spread the coronavirus at the start of the COVID-19 pandemic in March 2020 and a recent report published in the UK linked the game to over 30 subsequent deaths from the virus. Enditem。
How driverless cars will change our world
It's a late night in the Metro area of Phoenix, Arizona. Under the artificial glare of street lamps, a car can be seen slowly approaching. Active sensors on the vehicle radiate a low hum. A green and blue 'W' glows from the windscreen, giving off just enough light to see inside – to a completely empty driver seat.
The wheel navigates the curb steadily, parking as an arrival notification pings on the phone of the person waiting for it. When they open the door to climb inside, a voice greets them over the vehicle's sound system. "Good evening, this car is all yours – with no one upfront," it says.
This is a Waymo One robotaxi, hailed just 10 minutes ago using an app. The open use of this service to the public, slowly expanding across the US, is one of the many developments signalling that driverless technology is truly becoming a part of our lives.
The promise of driverless technology has long been enticing. It has the potential to transform our experience of commuting and long journeys, take people out of high-risk working environments and streamline our industries. It's key to helping us build the cities of the future, where our reliance and relationship with cars are redefined – lowering carbon emissions and paving the way for more sustainable ways of living. And it could make our travel safer. The World Health Organization estimates that more than 1.3 million people die each year as a result of road traffic crashes. "We want safer roads and less fatalities. Automation ultimately could provide that," says Camilla Fowler, head of automated transport for the UK's Transport Research Laboratory (TRL).
无人驾驶技术的前景一直很诱人。它有可能改变我们通勤和长途旅行的体验，让人们远离高风险的工作环境，并让各行业更高程度的发展和配合。它还是我们建设未来城市的关键。在未来，我们对汽车的依赖以及与汽车的关系将重新被定义——降低碳排放，为更可持续的生活方式铺平道路；我们的旅行也更安全。世界卫生组织估计，每年有130多万人死于道路交通事故。“我们希望道路更安全，死亡人数更少。英国交通研究实验室（Transport Research Laboratory）自动化运输主管卡米拉·福勒（Camilla Fowler）表示。
But in order for driverless technology to become mainstream, much still needs to change.
"Driverless vehicles should be a very calm and serene way of getting from A to B. But not every human driver around it will be behaving in that way," says David Hynd, chief scientist for safety and investigations at TRL. "It's got to be able to cope with human drivers speeding, for instance, or breaking the rules of the road."
And that's not the only challenge. There's regulation, rethinking the highway code, public perception, improving the infrastructure of our streets, towns, cities, and the big question of ultimate liability for road accidents. "The whole insurance industry is looking into how they're going to deal with that change from a person being responsible and in charge to the vehicle doing that," says Richard Jinks, vice president of commercial at Oxfordshire-based driverless vehicle software company Oxbotica, which has been testing its technology in cars and delivery vehicles at several locations across the UK and Europe.
The ultimate vision experts are working towards is of completely driverless vehicles, both within industry, wider transport networks, and personal-use cars, that can be deployed and used anywhere and everywhere around the world.
But with all these hurdles in place, what exactly does the next 10 years have in store for autonomous vehicles?
Two years from now
The biggest hurdle for those in the driverless technology industry is how to get the cars to operate safely and effectively in complex and unpredictable human environments. Cracking this part of the puzzle will be the major focus of the next two years.
At the Mcity Test Facility at the University of Michigan, experts are addressing this. The world's first purpose-built testing ground for autonomous vehicles, it's a mini-town of sorts, made up of 16 acres of road and traffic infrastructure. It includes traffic signals and signs, underpasses, building facades, tree cover, home and garage exterior for testing delivery and ride-hailing, and different terrains such as road, pedestrian walkways, railway tracks, and road-markings which the vehicles must navigate. It's here that experts test scenarios that even the most experienced of drivers may be pressed to handle, from children playing in the street to two cars trying to merge on a junction at the same time.
在密歇根大学（University of Michigan）的Mcity测试中心，专家们正在解决这个问题。这是世界上第一个专门为自动驾驶汽车建造的试验场。它是一个小型仿真城镇，由16英亩的道路和交通基础设施组成，包括交通信号和标志、地下通道、地上建筑物、树木、用于测试送货和叫车服务的住宅，以及不同的地形，如道路、人行道、铁路轨道和各种可能的路况。在这里，专家们测试了一些场景，即使是最有经验的司机也可能会面临压力，比如，孩子在街上玩耍，以及两辆车试图同时并道。
"In order to test driverless technology like this, it depends on hundreds of different variables in any given situation," explains Necmiye Ozay, associate professor of electrical and computer engineering at the University of Michigan. Her solution is to create a group of varied thinkers.
"We're trying to bring people from different parts of the university – not only engineers, but we have people from across disciplines such as psychology, more human-machine-interaction type people, because there are lots of angles to this problem we are trying to solve when it comes to safety," says Ozay. In the facility, Ozay and her team can test different traffic scenarios, as well as explore how autonomous vehicles communicate with each other yet keep vehicle and personal data secure from hackers.
“我们试图将来自不同地区的人聚集在一起， 不仅有大学的工程师，还有其他学科的学者，比如心理学家，更倾向人机交流的专家，因为我们正在努力解决安全问题时，需要多角度思考和推进 ，”欧泽说。在测试中心，欧泽和她的团队不但要测试不同的交通场景，还必须设计自动驾驶汽车之间的相互通信，甚至保护车辆和个人数据不受黑客攻击。
That self-driving taxis are already on the roads in Phoenix, Arizona, is due to a prolonged testing process like the one Ozay's team is conducting. Currently only available as a test service to the public in small defined areas, in the next two years there are plans to release the taxis on a greater and wider scale.
Much of the driverless technology already in use exists in industrial settings like mines, warehouses, and ports, but Hynd believes in the next two years we can expect to see this extended to "last mile delivery". This means the final part of a journey for goods and services – the point at which they are delivered to the consumer. For example, autonomous HGV trucks on motorways or even delivery vehicles for products and groceries.
Five years from now
While Apple says it is aiming to launch fully self-driving electric cars four years from now, industry experts are more cautious about what the near-future holds.
In the next five years most driverless technology will remain behind the scenes. TRL is investigating the potential for driverless HGVs on motorways, including the idea of platooning vehicles. Platoons are a group of semi-autonomous vehicles that drive a close distance between each other, stopping other vehicles from separating them. By driving closer together, vehicles in a platoon can be more fuel efficient by taking advantage of the slipstream of the truck in front while also helping to reduce congestion as the lorries take up less overall space on the road. Also in this space is Plus, the first self-driving truck manufacturer, whose European pilots commenced this year after a successful trial on Wufengshan highway in China's Yangtze Delta economic centre.
Away from these industries, Ozay further predicts that "we will possibly see lighter robotic vehicles that can potentially use sidewalks and bike paths with limited speeds – for delivering things such as food and groceries."
When it comes to public transport, Oxbotica is also working with German-based vehicle systems specialist ZF over the next five years to make the driverless shuttle a true mainstay for European cities, operating on roads, as well as at airports, much in the same way buses do now. "The shuttles in airports we see today on rails won't need those rails in five years from now. This means driverless shuttles have the potential to transport you from the car park to the airport, then straight through to your gate and the plane," Jinks explains.
For users, this could mean more reliable and cost-efficient transport systems. "Interlinking autonomous transport systems to bring a public transport system that is as efficient as you jumping in your own car and driving it yourself has got to be the answer to congestion in the future," adds Jinks.
Seven years from now
All experts agree that the next seven years will depend on the successes and failures of initial deployments, and how safety and public trust evolves accordingly. However, most hope that city redesigns will enable more adoption of the technology and help move us into modern, and more efficient ways of living. "If you live in a dense, urban area, the hope is that you'd be able to rely on mobility as a service. You could dial up the car, it would arrive in two minutes, and you make your journey. You wouldn't need to have those vast rows of parked cars in your street, which makes the street more navigable for the automated vehicle," says Hynd.
Without parked cars lining the street, roads could be narrower, making way for more green spaces. But while proponents of self-driving vehicles insist they will make our roads safer, there are some who feel pedestrians and autonomous vehicles simply can't mix. It could mean that our cities and the way we use them may need to be reimagined.
Some of this thinking is already taking place. In 2018, IKEA developed a concept autonomous vehicle that can double up as meeting rooms, hotels, and stores. The impact this type of innovation would have is reduced requirement for travel in the first place, offering instead interchangeable, on-demand environments as and when we need them. Our needs could be met right where we are.
10 years from now
Despite all the developments and innovations the next decade is likely to hold, some experts still feel we might be a way off from full deployment of driverless vehicles. By 2031, "full-self driving – human-level or above, in all possible conditions, where you can put kids by themselves in the car to send them to arbitrary locations without worrying – is not something I expect to see," says Ozay.
Hynd agrees that full automation is unlikely on this timescale. "With anything transport infrastructure, anything that society uses, so many other things need to come into play. And I don't just mean regulation," he says. Safety will be a major hurdle, especially for countries slower to adopt the change because of the huge costs involved. Infrastructure will also dictate how fast and effectively this technology can roll out, and public perception and willingness to use autonomous vehicles will need to increase according to Hynd.
But not everyone agrees. Jinks is confident that we'll see autonomous vehicles on the roads at the same time as human-driven vehicles in 10 years from now. In this vein, you may very well be stepping onto a driverless shuttle at the airport, then into a self-driving taxi to take you to your final destination.
Owning a driverless car in the next 10 years is less likely – it'll still be too expensive for most people, according to Hynd. But the promise of driverless technology is about unchaining us from our reliance on cars, and how that can transform the use of our time and our environment.
Much in the same way that electric charging stations have slowly entered car parks, side streets, and service stations, so too will autonomous vehicles eventually make their way into our everyday worlds. Years from now, we may well be wondering how we ever lived without them.
Tonga volcanic eruption not likely to cause global climate change, says New Zealand volcanologist******
The Tonga volcanic eruption is not likely to cause global climate change, while the volcanic ash and acid rain may damage crops and water supply, a leading New Zealand volcanologist said Monday.。
Professor Shane Cronin of the University of Auckland, who visited the Hunga-Tonga Hunga-Ha'apai volcano in November 2015, has explained the uniqueness of the volcanic event and its impacts.。
According to the professor, the most significant impact so far has been the tsunami generated at the beginning of the eruption.。
"Thankfully, the tsunami in Tonga was not so big," said the professor.。
All the homes on one of Tonga's small outer islands were destroyed in the massive volcanic eruption and tsunami, with three people confirmed dead so far, the government said on Tuesday in its first update since the disaster hit.。
"But mostly the damage is not so far from the coast and especially confined to a few very low-lying areas. Thankfully, most people were able to get away from those waves," he said.。
The other impacts locally in Tonga are from the ashfall. "Thankfully again, the ashes mostly fell into the ocean. On the Tongatapu island, there were reports of two centimeters of ash. This ash will impact water supply and some broad-leaf crops like corn, banana and squash, but unless there are more eruptions, this effect should allow a quick plant recovery."
Professor Cronin noted that most of the volcanic plumes from Saturday's eruption were in the troposphere or lower part of the atmosphere, below 25 km. Along with this short eruption means that there is not much aerosol to reflect sunlight and cause global cooling.。
"Most of the ash plume and gas plume that went into the air contains gases like sulpha dioxide. The rain will wash them down. There was not too large a volume of particles and aerosols high enough in the atmosphere to cause global cooling," he said.。
But the impact from acid rains for the affected areas such as Tonga and parts of eastern Fiji could be real. Should there be many more eruptions to come, and the acid rain continues, it could be more damaging for crops and water supply.。
The longer-term effects of the volcanic eruption on marine life could be significant, he said.。
On the downside, the local fishing and marine life will experience many changes as part of the volcano is destroyed. But there is some bright side along with the volcanic ashes in the longer term.。
"Because when ash falls into the ocean, it brings with it nutrients. For example, It can bring iron, which is usually quite low in the ocean. It can suddenly create a bloom of plankton, which then go through the food chain, creating a population boom later on the fish and other lives too," said Professor Cronin.。
According to the professor, a series of more minor eruptions happened in the submarine volcano in 1998, 2009, 2014, 2015 and perhaps even earlier than that. Saturday's eruption was so severe because a lot of the magma in the volcano had been building up for at least 10 years, or maybe longer.。
"The magma accumulates to a large size inside the volcaNo. The pressure of the magma, built up to a point that the top of the volcano can no longer hold it. At this point cracks start to happen, until suddenly the magma is released. The magma is full of gas and it expands extremely rapidly," said Professor Cronin.。
The central part of the Hunga volcano is about 150 meters to 300 meters below sea level. The amount of water that went into the crater was just big enough to fuel the big explosion that has sent waves of air pressure traveling around the world.。
"Also, tsunami waves were generated by the initial expansion as well as by changes in the surface on the top of the volcano," Professor Cronin said.。
"The maximum power of this eruption was very strong, equivalent to the Mount Pinatubo eruption in 1991 in the Philippines. However, the Saturday eruption was a very short one. It lasted less than 10 minutes for its main active phase. In contrast, the Pinatubo lasted for many hours," he said.。
The short period means that the overall amount of materials released from this eruption was relatively small. "We think around 0.5 cubic kilometers of materials was ejected into the air," Cronin said.。
The professor's best guess is the lower level of the VEI 5 range. "Which is roughly one per 10 years around the world for such a size," he said. "It may be more sort of normal mid-scale large eruption volume."
However, it is very difficult to predict what might happen next.。
"I would suggest that the eruption may be less violent from now on because the beginning of this eruption was all these pent-up magmas with a lot of trapped gas in it," Professor Cronin said.。
He also warned of future tsunami events. "This volcano is shallow and still have seawater on top. So any further eruptions or any collapse from the volcano can cause a tsunami in the local region. Probably there will be less wide-spread tsunami."