1 . Scientists say they've developed a system using machine learning to predict when and where lighting will strike. The research was led by engineers from the Swiss Federal Institute of Technology in Lausanne, Switzerland.
European researchers have estimated that between 6,000 and 24,000 people are killed by lightning worldwide each year. The strikes can also cause power outages, destroy property, damage electrical equipment and start forest fires. For these reasons, climate scientists have long sought to develop methods to predict and control lightning. In the United States and other places, ground-based sensing devices are used to identify strikes as they happen. But, no system has been created to effectively predict lightning.
The system tested in the experiments used a combination of data from weather stations and machine learning methods. The researchers developed a prediction model that was trained to recognize weather conditions that were likely to cause lightning.
The model was created with data collected over a 12-year period from 12 Swiss weather stations in cities and mountain areas. The data related to four main surface conditions: air pressure, air temperature, relative humidity and wind speed.
The atmospheric data was placed into a machine learning algorithm（算法）, which compared it to records of lightning strikes. Researchers say the algorithm was then able to learn the conditions under which lightning happens.
Amirhossein Mostajabi is a PhD student at the institute who led the development of the method. He said, “current systems for gathering such data are slow and complex and require costly collection equipment like radar or satellites.”
“Our method uses data that can be obtained from any weather station,” Mostajabi said. “This will improve data collection in very remote areas not covered by radar and satellite or in places where communication systems have been cut,” be added.
The researchers plan to keep developing the technology in partnership with a European effort that aims to create a lightning protection system. The effort is called the European Laser Lightning Rod project.
1. Why have climate scientists tried to predict and control lighting?| A．To collect relative data. |
| B．To reduce the destruction lightning has been causing. |
| C．To create a scientific system. |
| D．To do research in relation to machine learning. |
| A．air pollution | B．wind speed |
| C．relative humidity | D．air temperature |
| A．lighting. | B．the system being tested. |
| C．the atmospheric data. | D．the machine learning algorithm. |
| A．He developed the method and the system himself. |
| B．He thinks the current systems are too slow and simple. |
| C．He is a professor at the Swiss Federal Institute of Technology. |
| D．He believes their system does much better in data collection. |
2 . There’s no doubt that one of the greatest human achievements is the exploration of the space. Ever since astronaut Yuri Gagarin became the first person to be sent into the orbit around the moon in 1961, scientists have been pushing the boundaries further and further. But until now the exploration into the unknown has been dominated (主导) by men.
Of course, in the past, women were also included in the space projects and played an active role on the ground and behind the scenes. For example, they worked as seamstresses (女裁缝师), sewing vital spaceflight components. In fact, many of NASA’s key works would never have been possible without them. Recently Hollywood produced a movie called Hidden Figures to focus on a group of American female mathematicians, especially the black women, who helped NASA send the first American into space. But this was not women’s only contribution. Back in 1963, Soviet astronaut Valentina Tereshkova became the first woman to be sent into space. However, after that, space flight programs were slow to employ women. In the USA. NASA didn’t accept applications from women to become astronauts until 1978.
But attitudes have changed and leading officials at NASA say that the first person to set foot on Mars should be a woman. The space agency aims to have a sex-balanced workforce but can only achieve that if equal numbers of men and women are trained for science and technology jobs. As Allison McIntryre told the BBC, “My director is a woman. We have female astronauts. We haven’t put a woman on the moon yet. And I think that perhaps the first person to step on Mars should be a woman.”
1. What did Yuri Gagarin do in 1961?| A．He landed on the moon in success. |
| B．He discovered many new boundaries. |
| C．He led scientists to explore the moon. |
| D．He made the first journey into the space. |
| A．To show women are the true heroes of NASA’s first launch. |
| B．To stress that black people have won equal rights in NASA. |
| C．To prove women can do as well as men in NASA’ projects. |
| D．To present women’s contributions to NASA’s space programs. |
| A．Uncaring. | B．Disapproving. |
| C．Supportive. | D．Disappointed. |
| A．Will the First Person to Step on Mars Be a Woman? |
| B．Great Achievements Have Been Made in Space Exploration? |
| C．Why Men Played an Important Role in Exploring the Unknown? |
| D．Men and Women Have Made Equal Contributions to NASA’s Projects? |
