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发布时间: 2025-05-31 02:38:34北京青年报社官方账号
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  濮阳东方看男科评价高专业   

LOS ANGELES, March 18 (Xinhua) -- The moon will move closer to Earth than it has been in more than 18 years Saturday night, space. com reported on Friday.On Saturday afternoon at 3 p.m. Eastern Daylight Time (1900 MGT) , the "supermoon", as dubbed by some observers, will arrive at its closest point to the Earth in 2011: a distance of 221,565 miles ( 356,575 kilometers) away, and only 50 minutes earlier, the moon will officially be full, the report said.At its peak, the supermoon may appear 14 percent larger and 30 percent brighter than lesser full moons (when the moon is at its farthest from Earth), weather permitting, said the report.Yet to the casual observer, it may be hard to tell the difference, according to the report.Scientists say it is a fluke of orbital mechanics that brings the moon closer to Earth.The supermoon will not cause natural disasters, such as the Japan earthquake, NASA scientists say.In December 2008, there was a near-supermoon when the moon turned full four hours away from its perigee - the point in its orbit that is closest to Earth. But this month, the full moon and perigee are just under one hour apart, promising spectacular views, depending on local conditions, the report said.

  濮阳东方看男科评价高专业   

WASHINGTON, April 5 (Xinhua) -- NASA and co-researchers from the United States, the Republic of Korea and Japan have found a new mineral named "Wassonite" in one of the most historically significant meteorites recovered in Antarctica in December 1969, the U.S. space agency said on Tuesday in a statement.The new mineral was discovered within the meteorite officially designated Yamato 691 enstatite chondrite. The meteorite likely may have originated from an asteroid orbiting between Mars and Jupiter. Wassonite is among the tiniest, yet most important, minerals identified in the 4.5-billion-year-old sample.The research team, headed by NASA space scientist Keiko Nakamura-Messenger, added the mineral to the list of 4,500 officially approved by the International Mineralogical Association."Wassonite is a mineral formed from only two elements, sulfur and titanium, yet it possesses a unique crystal structure that has not been previously observed in nature," said Nakamura-Messenger.In 1969, members of the Japanese Antarctic Research Expedition discovered nine meteorites on the blue ice field of the Yamato Mountains in Antarctica. This was the first significant recovery of Antarctic meteorites and represented samples of several different types.As a result, the United States and Japan conducted systematic follow-up searches for meteorites in Antarctica that recovered more than 40,000 specimens, including extremely rare Martian and lunar meteorites.Researchers found Wassonite surrounded by additional unknown minerals that are being investigated. The mineral is less than one-hundredth the width of a human hair or 50x450 nanometers. It would have been impossible to discover without NASA's transmission electron microscope, which is capable of isolating the Wassonite grains and determining their chemical composition and atomic structure."More secrets of the universe can be revealed from these specimens using 21st century nano-technology," said Nakamura- Messenger.The new mineral's name was approved by the International Mineralogical Association. It honors John T. Wasson, professor at the University of California, Los Angeles. Wasson is known for his achievements across a broad swath of meteorite and impact research, including the use of neutron activation data to classify meteorites and to formulate models for the chemical makeup of bulk chondrites.

  濮阳东方看男科评价高专业   

BEIJING, Feb. 8 (Xinhua) -- China respects the results of south Sudan referendum, which was announced Monday, Chinese Foreign Ministry spokesman Hong Lei said Tuesday.Hong made the remarks in a statement concerning China's view on the results of the referendum."China respects the choice of Sudan people and appreciates the unremitting efforts of both the north and the south to promote the peace process between the two sides," Hong Lei said."China hopes the two sides will continue to resolve controversial issues through dialogue and consultation in line with the principle of mutual understanding and mutual accommodation," Hong said."China expects full implementation of the Comprehensive Peace Agreement(CPA) as well as long peace and stability in Sudan."The referendum, conducted from Jan. 9 to 15, was a major condition of the CPA, which ended a two-decade civil war between the two sides.The South Sudan Referendum Commission Monday announced the final results of the referendum saying that 98.83 percent of the voters had voted for separation.

  

BEIJING, Jan. 22 (Xinhua) -- The Chinese central government in Beijing pledged Saturday that it would work to ensure smooth and safe traveling for the public as many return home to reunite with families during the Spring Festival.It is expected that some 700 million people are to travel during a 40-day Spring Festival travel period that began Wednesday, but heavy snow and icy rain, which has continued since the new year began, has disrupted traffic and cut water and power supplies to some regions in south and southwest China.The lingering freezing weather also poses great challenges to transportation and railway authorities, as they work to avoid another travel disaster, as was seen in early 2008 when unprecedented heavy snow and freezing rain inundated the south of the country, bringing traffic to a standstill at the peak holiday season.Due to this, the Ministry of Public Security announced on Saturday that it had drawn upon the experiences gained from the 2008 weather disaster, and has ordered local bureaus to begin planning precautionary measures to combat the freezing weather.It also issued orders to local departments beginning in late December to step up snow clearance and make sure expressways and key trunk lines are not closed by snow."More police will be deployed to maintain traffic order and security, and to reduce offences such as drunk driving, speeding, passenger overloading of cars and trucks, and driving while fatigued," Huang Ming, Vice Minister of Public Security, said in a press conference held in Beijing.Meanwhile, over 8,300 service stops would be established across the country in order to provide necessities such as water and medical help to drivers and migrant works returning home for the festival.China's meteorological authority forecast Saturday that snowy weather will weaken in most regions over the next three days, but the eastern areas in southwest China will continue to see more rain and snow.On Sunday, the weather forecast anticipated that moderate snow would hit some regions in Inner Mongolia, Guangxi, and Hainan, as the southwestern province of Guizhou will see more icy rain.Local authorities said nearly 10 million have been affected in Hunan after a blizzard that started Monday, which also forced the evacuation of 73,000 people. About 15 power lines were shut down and 132 roads were closed because of snow and icy rain in Guangxi.As the freezing weather makes travel on roads more difficult, railway stations are seeing surges in passenger numbers.An official with the Ministry of Railways (MOR) said nearly 4.8 million passengers took trains on Jan. 19, the first day of the travel peak season this year, up 11.9 percent compared to the corresponding day last year. The next day, over 4.9 million passengers traveled on railways, up 17.5 percent. The Nanchang railway station even saw passenger number jump 30 percent.The MOR said earlier that it would run an additional 293 pairs of trains per day during the rush period in order to meet climbing passenger demand.Further, the Vice Minister of the country's National Development and Reform Commission, the country's top economic planning body, said the ministry would work with other government departments to implement multiple measures in maintaining a stable supply of coal, electricity, oil, and gas so that residents' demands for heating and power use can be met during the festival.The traditional Chinese Spring Festival, or chun jie in Chinese, is the country's most important festival. It falls on Feb. 3 this year. Workers nationwide enjoy a seven-day holiday that ends on Feb. 8.

  

SHANGHAI, May, 13 (Xinhua) -- Scientists attending a recent high-level conference on robotics agreed that great progress has been made in the field, but strict rules for the safe usage of robots should be implemented."Four years ago, if you went into a Chinese factory and said 'robots can help you work,' you would be kicked out. But now, China has a large industrial robot market, along with Japan, the Republic of Korea and the United States," says Li Zexiang, general chair of the 2011 International Conference on Robotics and Automation (ICRA 2011), which concluded Friday in Shanghai.Chinese robotics researchers have suggested to the government that rules and regulations for robot usage should be created. Professor Wang Tianmiao from the Beihang University (BUAA) told Xinhua about the suggestions during the conference.Wang says that in the future, it might not be possible for artificial intelligence to take the place of humans in some social roles. However, Wang says that mankind should pay close attention to the possible dangers of advancements in robotics, as the industry is currently undergoing dramatic changes.The five-day conference, which is organized by the Institute of Electrical and Electronics Engineers (IEEE), took place in China for the first time ever since its first session in 1984, which took place in the city of Atlanta in the United States.Media reports show that Japan, the Republic of Korea (ROK) and several Western countries have already drafted rules about the safe use of robots.

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