十堰大功率工业吸尘器(嘉兴大功率工业吸尘器) (今日更新中)

WASHINGTON, Dec. 21 (Xinhua) -- NASA's Dawn spacecraft has sent around 10,000 pictures of the giant asteroid Vesta back to Earth for the first time since its launch in 2007, the U.S. space agency announced Wednesday.The images were taken from an average altitude of 209 km, the closest the spacecraft can get.From the images, scientists could see Vesta's stippled and lumpy surface in great detail, and its many small craters, grooves, and lineaments. The fine scale of the images highlights small outcrops of bright and dark material.With these new discoveries, scientists believe that studying Vesta can help decode the early history of the solar system.Dawn will maintain its low-altitude orbit for another 10 weeks before moving to a higher orbit for another round of photo-taking.Launched in 2007, the 446 million U.S. dollar project aims at studying the chemical composition of Vesta's surface and probing its interior structure.Dawn will leave Vesta in July next year and arrive at the dwarf planet Ceres in February 2015.

BEIJING, Jan. 15 (Xinhua) -- The winning of Ma Ying-jeou and Kuomintang (KMT) in Saturday's elections may open new chances for the peaceful development of cross-Strait relations.The results of the elections have indicated that the peaceful development of the cross-Strait relations is a correct path and has been widely recognized by the Taiwan people.Any persons and any political parties of Taiwan should follow this trend, so that they could earn recognition and support.Moreover, the victory of Ma and the KMT may represent a new opportunity for the development of the cross-Strait relations.With joint efforts of the two sides to fortify and enhance the existing mutual trust, there will be a even brighter prospect and further progresses in the cross-Strait talks, exchanges and cooperation.However, the two sides should be wary that the situation in the island is still complicated and the "Taiwan independence" stance will continue to haunt the cross-Strait relations development.There are still some long-term disputes and divergences existing between the two sides that await resolving.This year's elections were carried out under a background in which the cross-Strait relations have been significantly improved. The positive effects of the peaceful development of the cross-Strait relations have fully emerged.Over the past four years, the two sides of the Taiwan Strait have established a political mutual trust based on opposition to the "Taiwan independence" stance and adherence to the "1992 Consensus."The two sides resumed regular talks between the mainland's Association for Relations Across the Taiwan Straits (ARATS) and the Taiwan-based Straits Exchange Foundation (SEF) in 2008.The opening of "three direct links" of cross-Strait mail, trade, air and shipping services, has also pushed forward the cross-Strait economic cooperation into a brand-new stage.These achievements have brought about real benefits to the people on both sides of the Strait, especially the people in Taiwan.The cross-Strait economic cooperation has also helped the island's economy to buoy up from blows of the global financial crisis.The peaceful development of the cross-Strait ties have won a widespread support among the Taiwan people and it is also appreciated by the international community.During the election campaigns, whether to stick to the 1992 Consensus became a major field of cross fires among candidates. Ma had stood out and gained positive momentum with his cross-Strait policies.Numbers of Taiwanese notables, business tycoons as well as the small and medium-sized enterprise owners and the grassroots people have also expressed their stance for the "1992 Consensus" and their aspiration for further peaceful development of the cross-Strait ties.Under the public's pressure, the Democratic Progressive Party and its candidate Tsai Ing-wen have to lower their voices for "Taiwan independence."But their denial of the "1992 Consensus" and the stance of "one country on each side" could not abate the people's doubts and worries and finally led to their failure in the elections.Judged from the election, peaceful development of cross-Strait relations have developed from a concept to reality, benefitting people from different backgrounds and recognized by the public.

BEIJING, Oct. 11 (Xinhuanet) -- Scientists have discovered that blind optimism is related to brain's frontal lobes which are associated with processing errors, according to a British study published Monday in the journal Nature Neuroscience.Scientists at the University College of London scanned brains of volunteers who were asked to estimate their personal likelihood of involving in negative events, like a divorce or cancer,  before and after given the average probability of these events occurring.They found that the volunteers who estimated lower probability (or the more optimistic ones) than the given one raised their estimates a little bit later while those estimated higher probability altered their estimates much more.Through the brain scanner, scientists saw there was less activity in the volunteers' frontal regions when the information given was worse than expected while more activity when the information was better than expected. It suggested that the more optimistic people neglected the negative predictions."The more optimistic we are, the less likely we are to be influenced by negative information about the future," said Dr. Tali Sharot, lead author of the study. He added being optimistic clearly had some benefits, "but it can also mean that we are less likely to take precautionary action, such as practising safe sex or saving for retirement. So why don't we learn from cautionary information?"

BEIJING, Oct. 12 (Xinhuanet) -- People are often recommended to eat plenty of fruits and vegetables, but only a minority people take the advice. A new research may motivate more people to do so.BBC reported a new study Tuesday that found eating lots of vegetables and fruits can weaken the effect of a gene variant called 9p21, which is reported to be one of the strongest predictors for heart disease, thereby reducing risks of heart disease.The researchers from McMaster and McGill universities studied the diets of more than 27,000 people around the world, including Europe, China, and Latin America.They found that people with the high-risk gene appeared to have a similar risk of heart disease as people with a low-risk variant of that gene after consuming a diet with a healthy amount of vegetables and fruits.But how diet has such an effect on the gene was unknown, said Dr. Sonia Anand, a lead author of the study published in PLoS Medicine journal.Anand added, "Despite having a high genetic risk for heart disease, a healthy lifestyle can actually turn off the gene."The message here is very clear, eating plenty of vegetables and fruits is definitely good to people's heart health, according to BBC.

HAIFA, Israel, Oct. 5 (Xinhua) -- "It's a big day, a celebration shared by Israel, science and the entire world," Israeli researcher Daniel Shechtman, who won the 2011 Nobel Prize in chemistry, said here at a press conference at the Technion- Israel Institute of Technology.Shechtman, 70, has spent the past five decades at Technion. He is also an associate at the Ames Laboratory of the U.S. Department of Energy and has lectured at universities abroad."Thousands of scientists are currently researching the subject I developed and I'm sure that all of them view the prize as their accomplishment too," he told Xinhua, adding that, "Science (in general) wouldn't be here and be as prosperous and intricate as it is if not for the work of thousands of others around the world."The Swedish Royal Academy of Sciences on Wednesday announced Shechtman as the winner of this year's Nobel chemistry prize for his cutting-edge research on quasicrystals, a type of atom form that for decades was considered impossible by the global scientific community.The award panel explained that Shechtman's work, launched in early 1980s, has revolutionized the perception of solid matter.His work forced crstyallographers to revamp their basic conception that atoms inside crystals only have repeating and symmetrical patterns.Shechtman is the 10th Israeli scientist to win the Nobel Prize and the fourth to win the prize in chemistry.Ada Yonat, a researcher at the Weizmann Institute near Tel Aviv, received the chemistry prize in 2009.The announcement from Stockholm captured headlines in Israel, drawing praise from the country's leadership, who said Shechtman's achievement is a testament to the Jewish state's stature as a technological powerhouse.Israeli Prime Minister Benjamin Netanyahu said the winning of the Nobel Prize "expresses our people's intellect.""Every Israeli citizen is happy today and every Jew in the world is proud," a statement issued by Netanyahu's office quoted him as telling the scientist in a telephone call.Israeli President Shimon Peres, who is also a Nobel laureate, later called to congratulate Shechtman."You demonstrate that a thinking person who is hardworking and brave can make groundbreaking scientific discoveries," he said.

来源：资阳报