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发布时间: 2025-06-01 11:01:14北京青年报社官方账号
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SAN FRANCISCO (AP) — Google announced Wednesday it has achieved a breakthrough in quantum computing, saying it has developed an experimental processor that took just minutes to complete a calculation that would take the world's best supercomputer thousands of years.The feat could open the door someday to machines so blazingly fast that they could revolutionize such tasks as finding new medicines, developing vastly smarter artificial intelligence systems and, most ominously, cracking the encryption that protects some of the world's most closely guarded secrets.Such practical uses are still probably decades away, scientists said. But the latest findings, published in the scientific journal Nature, show that "quantum speedup is achievable in a real-world system and is not precluded by any hidden physical laws," the researchers wrote.RELATED: Google Maps will now allow drivers to report hazards, slowdowns and speed trapsBig tech companies including Microsoft, IBM and Intel are avidly pursuing quantum computing, a new and somewhat bewildering technology for vastly sped-up information processing.While conventional computing relies on bits, or pieces of data that bear either a one or zero, quantum computing employs quantum bits, or qubits, that contain values of one and zero simultaneously.But quantum computing requires placing the fragile and volatile qubits in colder-than-outer-space-refrigerators to control them.Google's quantum processor looks like an upside-down garbage can, out of which comes a series of tubes used to conduct signals to a chip. The whole thing is stored in a cool chamber to protect the chip.RELATED: Google unveils new Pixel 4 smartphone, Pixel BudsGoogle said that its quantum processor, called Sycamore, finished a calculation in 3 minutes, 20 seconds — and that it would take the world's fastest supercomputer 10,000 years to do the same thing.The calculation was a random sampling problem, similar to looking at the various combinations that could come from dice or a gambling machine. It has little practical value, other than to test how well the processor works."The more interesting milestone will be a useful application," said Chris Monroe, a University of Maryland physicist who is also the founder of quantum startup IonQ.Google's findings, however, faced pushback from other industry researchers. A version of Google's paper leaked online last month.IBM took issue with Google's claim that it had achieved "quantum supremacy," or the point when a quantum computer can perform a calculation that a traditional computer can't complete within its lifetime.IBM researchers said that its IBM-developed supercomputer, called Summit, could actually do the calculation in 2.5 days.Google disputed IBM's claims.Whether or not Google achieved "quantum supremacy," the research suggests the field is maturing."The quantum supremacy milestone allegedly achieved by Google is a pivotal step in the quest for practical quantum computers," John Preskill, the Caltech professor who coined the term "quantum supremacy," wrote in a column after the paper was leaked.It means quantum computing research can enter a new stage, he wrote, though a significant effect on society "may still be decades away."One feared outcome — though experts said it is a long way off — is a computer powerful enough to break today's best cryptography.Quantum computers might also one day lead to the development of better artificial intelligence systems to guide financial portfolios, crop yields or transportation routes.The promise of such applications has attracted interest from the U.S., China and other governments. President Donald Trump last year signed a measure to spend more than .2 billion over five years for quantum research across the federal government. 3797

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SAN DIEGO (KGVT) - For many students across California, school is either back in session or will start soon in a virtual setting.With uncertainty about what the school year will look like for all children, the parents of students identified as needing special education services are raising serious concerns about their child’s access to necessary supports and resources."Right now, school is virtual," said Sally Sachrison. "It’s been quite a challenge".Sachrison's 12-year-old son just started the 7th grade. That's an achievement, but the emotions she's feeling are not the typical excitement of going back to school."It's just overwhelming because distance learning doesn't always work for everybody, and I feel like they have abandoned our kids that really the special services," Sachrison said.Her son has Down syndrome and is autistic. His unique needs can’t be met over a computer, Sachrison said.“The conflict is that my son needs like a special education teacher, he needs a speech pathologist, he needs an occupational therapist, and these are specialized, trained professionals," she explained.Sachrison said she’s already noticed her child regressing just since schools moved to remote learning in mid-March to prevent the spread of COVID-19. By May, he was slurring his speech and having trouble with other tasks, she described.Regression and lack of services are a concern heard by attorney's and advocates from parents across the state."How do you take a parent and say hey we're going to train you to do occupational therapy even though you're not licensed to do it?” said Nicole Shelton, the executive director of Advocacy Associates Inc. "You don't have that background and still have that done virtually."Advocacy Associates Inc. is an origination that helps families of students with specials needs get the services to which they are entitled by law.In California, once a child is found eligible for special education, the family will participate in the process by attending an individualized education program or IEP.It's both a process and a written document.Shelton explained the IEP team, which includes representatives from the school and district, meets once every three years to conduct an assessment to ensure the student still qualifies. The team must also meet annually to review progress on goals, create new goals, and see what accommodations the student needs.She said parents are concerned that won't happen."I think it's important for parents to be requesting IEP meetings right now," Shelton said.There are also concerns about services not being provided and compensating students if they've regressed because they weren't provided with appropriate services and support."I think parents absolutely need the first step to be asking for that emergency IEP," she said. "We need to talk about services, and we need to talk about accommodation."In Sachrison's case, the district told 10News, "Providing equitable educational experiences to all students including students with disabilities is a key priority for us and we want the service you receive to reflect that principle. Due to the current school closure emergency that prevents in-person instruction, student Individualized Education Plans will be implemented through distance learning to the greatest extent practical via online resources and other means. The IEP will be provided by means of ‘distance learning’, as determined by your child's teachers, in light of the emergency circumstances."A district spokesperson explained, “‘Distance learning’ means instruction in which the pupil and instructor are in different locations. ‘Distance learning’ may include, but is not limited to, all of the following: (1) Interaction, instruction, and check-ins between teachers and pupils through the use of a computer or communications technology. (2) Video or audio instruction in which the primary mode of communication between the pupil and certificated employee is online interaction, instructional television, video, tele-courses, or other instruction that relies on computer or communications technology. (3) The use of print materials incorporating assignments that are the subject of written or oral feedback. This applies to the special education and related services in the IEP to the greatest extent possible in light of the emergency circumstances. Under current public health and CDE guidelines we cannot provide services either at the school, or in person, for more than 10 days due to the qualifying state of emergency. The parent will be notified as to the specific means by which the student's IEP will be provided, given the emergency circumstances present at that time. The IEP will be provided by alternative means as necessitated during the period of emergency conditions only."The district said IEP meetings are being scheduled to take place virtually and it is dependent upon the IEP team to determine whether new goals will be developed on an individual basis.When asked how the district plans to handle learning regression from the spring and forward and whether the state has provided any guidance a spokesperson explained, "When ‘regular’ school hours resume there will certainly be a need to discuss each students' services since distance learning falls short of providing optimal outcomes. At that time students with disabilities, in addition to ALL students in the general education setting, will have to undergo some form of instructional/educational recuperation. Our district is currently considering multiple options to meet this need."A spokesperson for the California Department of Education said students who are receiving special education services through their school district have an IEP and the services and/or accommodations they receive are listed in that IEP."The federal government has not waived the federal requirements under the Individuals with Disabilities Education Act (IDEA) and local educational agencies (LEA) should adhere to IDEA requirements. In the upcoming school year, local educational agencies in consultation with their local health agency may offer in-person instruction, distance learning, or a combination of both. Section 43503(b)(4) specifies that distance learning shall include "Special education, related services, and any other services required by a pupil's individualized education program pursuant to Section 56341, including the requirements of subparagraph (A) of paragraph (9) of subdivision (a) of Section 56345, with accommodations necessary to ensure that individualized education programs can be executed in a distance learning environment." 6617

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San Diego State University on Thursday detailed a 0 million plan to avoid the massive flooding that has engulfed the Mission Valley Stadium site, which it plans to turn into a West Campus. The current stadium sits on a 166-acre site that is largely sloped, causing runoff from the nearby San Diego River and Murphy Canyon Creek to pool. In 2010, the flooding got so bad that it went onto the field and threatened the Holiday Bowl football game. Voters in November approved the SDSU West measure, paving the way for the university to turn the site into a Mission Valley campus with a smaller football stadium and a river park. The project is currently going through the environmental process. "It started out as a technical problem and it became kind of a foundation of our design and our vision," said Laura Shinn, SDSU's director of planning. SDSU presented its plan to mitigate the flooding to the city's environmental committee Thursday. The idea is to turn most of the sloping site into an elevated, flat area for the campus and stadium. Then, it would build parts of the river park on a slope along the edge, giving the water a place to go. 1156

  

SAN FRANCISCO (AP) — A federal count shows the number of homeless people increased by double-digit percentages in three San Francisco Bay Area counties over two years as the region struggled to tackle the growing problem, including 17% in San Francisco and 43% in the county that includes Oakland.More than 25,000 people were counted as homeless during an overnight tally conducted in San Francisco, Alameda and Silicon Valley's Santa Clara counties in January. Detailed reports are expected later this year."The initial results of this count show we have more to do to provide more shelter, more exits from homelessness, and to prevent people from becoming homeless in the first place," said San Francisco Mayor London Breed.The San Francisco Bay Area is grappling with a homelessness crisis driven in part by too little housing stock and a raring tech economy that has widened the inequity gap. In San Francisco, the median price of a two-bedroom home is .3 million and a family of four earning 7,400 a year is considered low income.The homelessness point-in-time count is conducted every two years and is required by the U.S. Department of Housing and Urban Development. Los Angeles is expected to release its figures on May 31.Homelessness is an issue that has riven the Bay Area for years, with elected leaders pledging to do more to address it. However, controversies continually erupt over where to build homeless shelters. Residents of a wealthy San Francisco neighborhood, for example, are fighting the city's plans to erect a shelter along the waterfront Embarcadero area that is popular with tourists.In San Francisco, the number of people who were not sheltered surged 20% to nearly 5,200, driven largely by people who are living in cars. In Santa Clara County, which includes the city of San Jose, the homeless population increased 31% to about 9,700 this year. Alameda and San Francisco counties each counted more than 8,000 homeless.California Gov. Gavin Newsom has proposed giving cities and counties up to 0 million to build and expand emergency homeless shelters. He's also proposing million to help public colleges and universities house homeless students and million for legal aid for people facing eviction. 2252

  

SAN DIEGO, Calif. (KGTV) - After serving active duty in the Marine Corps from 2013 to 2017, Cole Lawton pictured himself when he heard the news that nine service members had died in a routine training incident involving an AAV. Lawton said he has been inside an AAV and can imagine the terror those eight Marines and one Sailor must have felt in the moments when the AAV sunk.“I couldn’t help but imagine myself when I was in those amtracs if the same thing had happened to me … and that’s a nightmare,” he said.RELATED: Service members in deadly Southern California amphibious assault vehicle accident identifiedLawton also is a lover of the ocean and has a passion for diving, so he wanted to pay tribute to the nine lives lost using his skills. He and a group of friends took an American flag and the Marine Corps flag diving and took photos with the flags in the deep water. They posted photos with the caption “In memory of the Marines and Sailor of 1/4 who's amphibious vehicle sank to the ocean floor, we raised the colors at sea to show even 130 feet underwater, freedom still rings. Gentlemen, Marines have officially taken Davy Jones Locker.”The post exploded online and as of Sept. 11, had been shared more than 13,000 times. Family of the nine people killed even commented, thanking the divers for their tribute.“From the brotherhood of the Marines to the families extended by the Marine Corps, it’s all the same. It’s powerful to me. And it meant a lot to me that it meant a lot to them,” said Lawton. 1522

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