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Edmunds recommends the five best SUVs for under $40K_我的网站

A |     　　人造卫星通常在通信、导航、遥感、科学探测等领域发挥作用，如今，中国科学家正尝试让卫星多一颗“大脑”——把算力也送上太空。那么，为何一定要把算力“打”上天？　　太空计算星座就像把“电脑”打上天　　2025年5月，我国将全球首个太空计算卫星星座“星算”送入太空。    The automotive experts at Edmunds test SUVs of all shapes, sizes and prices. During these evaluations, certain models rise to the top with qualities such as roomy seating and cargo areas, a comfortable ride, and easy-to-use touchscreens and technology features. But with many prospective buyers looking to make every dollar count, it’s important to consider value as well.Working with a budget cap of $40,000, Edmunds picked five SUVs to highlight. Some have city-friendly proportions that take the stress out of parking in tight spots, while others have cavernous cargo holds and handy third-row seating. They are listed below in order of price, which includes the destination charge.2024 MAZDA CX-50The Mazda CX-50 small SUV earns a spot in this list thanks to its driving refinement and upscale cabin. From inside it’s not hard to believe that you’re behind the wheel of a luxury-badged model. The design is first-rate and the seats are supportive in either row. The CX-50 rides a bit more firmly over bumps than other SUVs, but in return it has stable handling and is enjoyable to zip around town in or take out on a scenic drive. All-wheel drive is standard on every trim, as are driver assist features such as lane keeping assistance, traffic-adaptive cruise control and blind-spot warning. A 186-horsepower four-cylinder serves as this Mazda’s capable and budget-minded base engine. There’s an optional turbo four-cylinder that’s more powerful, but it nudges the price at or above a $40,000 spending limit.Starting manufacturer’s suggested retail price: $31,6752023 KIA SORENTOThe Kia Sorento is a compelling choice for shoppers wanting a low-priced seven-passenger SUV. Its third-row seating area is smaller than those of bigger models — such as the Hyundai Palisade listed below — but it is still suitable for occasional use for kids. Most of the Sorento’s trim levels come well stocked with helpful convenience and technology features.There is a choice of a fuel-conscious, non-turbocharged 191-horsepower four-cylinder engine or a punchier 281-horsepower turbo-four available in higher trims. And it’s possible to opt for the more powerful engine and keep the Sorento’s price well below $40,000. A Sorento Hybrid is also available for shoppers seeking higher fuel economy. Starting MSRP: $31,4152024 HONDA CR-VThe Honda CR-V is about as well rounded as a small SUV can get. It delivers a smooth and comfortable ride, great outward visibility, and loads of cargo space. Fuel economy is another plus point. The CR-V’s base 190-horsepower turbocharged four-cylinder gets up to an EPA-estimated 30 mpg combined, or you can opt for the 204-hp hybrid powertrain that gets up to 40 mpg combined. Thanks to its recent redesign for the 2023 model year, the interior of the CR-V is attractive and functional. Picking the midgrade EX-L trim stays under our budget limit and still gets you some upscale features such as leather upholstery, a power liftgate and a bigger center touchscreen. Starting MSRP: $30,8252024 SUBARU OUTBACKThe Subaru Outback is ideal for SUV shoppers who want a vehicle that’s suitable for occasional off-road adventures. Thanks to its standard all-wheel drive and generous ground clearance, the midsize Outback has above-average capability on dirt roads or rocky trails. The Outback’s wagon-like shape also makes it easier to load recreational gear or cargo on the roof.Acceleration from the Outback’s standard 182-horsepower four-cylinder can be slow when you need a burst of speed on the highway, but in exchange the Outback gets a respectable EPA-estimated 28 mpg combined. A more powerful turbocharged four-cylinder is also available, though it exceeds our budget cap.Starting MSRP: $30,1902024 HYUNDAI PALISADEThe three-row Hyundai Palisade is the most expensive SUV among Edmunds’ choices here, and the majority of trims are priced beyond a $40,000 budget. But it’s important to know even the base Palisade is equipped with a long roster of tech features and driving aids. Highlights include a big 12.3-inch center touchscreen, first- and second-row USB ports, traffic-adaptive cruise control and blind-spot warning.All Palisades come with a 291-horsepower V6 engine that delivers acceptable acceleration and fuel economy. Despite its relatively large size, the Palisade is relaxing to drive and easy to maneuver. Also worth noting is its third-row seating has ample space even for adults, which is a rarity among many midsize SUVs. Starting MSRP: $37,735_______This story was provided to The Associated Press by the automotive website Edmunds.Nick Kurczewski is a contributor at Edmunds and is on Twitter and Instagram。该星座首发12颗卫星，每颗卫星均搭载了星载智算系统、星间通信系统，具备太空计算、太空互联能力。

B | 　　那么，什么是“计算卫星”？对此，中国科学院微小卫星创新研究院研究员郑文在中国科学院《科学公开课》中介绍，这就像是把人们常用的笔记本电脑“打”到天上去了，使得原来要在地上处理的数据，可以在天上得到及时处理。

C | 　　未来，郑文透露，可能通过星簇或星群组网形成统一的算力供给，最终希望在太空直接建造一个超大型算力中心：“我们可能会在太空中间建一个边长4000米×4000米的一个航天器，来提供无限算力。真正在太空中间建立起一个计算的基础设施，给每一个人提供算力服务。”　　为何一定要把算力“打”上天？　　把算力中心搬上太空有着一定的现实优势，例如，能源——太阳一直在，太阳能源持续可得。

D | 此外，空间中背日面温度比较低，在散热、热管理方面有一定优势。　　但是，郑文也指出，这样的优势背后并存的是极端环境的严峻挑战：“这也是至今未能大规模实现太空计算的核心原因。第一个难题是散热，第二个难题是高能粒子辐射。”　　太空中没有空气，散热只能靠辐射散热，因此，太空算力中心就需要巨大的辐射散热面积。　　此外，计算机底层依赖电子“0”和“1”的开关状态，而高能粒子一旦穿透芯片，会把电子打翻。

E | 郑文解释称：“原本是‘0’的地方可能就变成‘1’了，原来的‘开’就变成了‘关’，这样一来，输出的信息就会变成乱码”。

F | 因此，这两大极端条件正是建设太空计算设施的瓶颈。

G | 　　把算力送上太空并非最终目标　　中国科学院微小卫星创新研究院研究员郑文表示，将算力送上天是实现自主智能的关键一步。例如，让中国空间站的机械臂拥有能够计算的“大脑”，从而实现代替航天员执行舱外操作的目标。　　除了自主操作外，科学家们还希望卫星能够更智能地去完成一些任务。郑文透露，中国科学院微小卫星创新研究院正在设计一款未来航天器——“哪吒(NEZHA)”。从它的名字中可以大致推断出它的形态，郑文介绍，它有“三头六臂”，能变形，还能在太空中自主飞行：“它多了两个手臂，可以自主执行维修任务，例如，有一些卫星坏了或者没有能源了，就可以把这些小‘哪吒’派出去，进行维修、修复。”　　郑文表示，只有把人工智能、算力与卫星深度结合，一同送上太空，未来才能真正建造属于人类的太空基地。　　(中央广播电视总台中国之声)。

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