Self-driving vehicles will rely on cameras, sensors and artificial intelligence（AI）to recognize and respond to road and traffic conditions, but sensing is the most effective for objects and movement in the neighborhood of the vehicle. Not everything important in a car's environment will be caught by the vehicle's camera. Another vehicle approaching at high speed on a collision （碰撞）track might not be visible until it's too late. This is why vehicle-to-vehicle communication is undergoing rapid development. Our research shows that cars will need to be able to chat and cooperate on the road, although the technical challenges are considerable.

    Applications for vehicle-to-vehicle communication range from vehicles driving together in a row, to safety messages about nearby emergency vehicles. Vehicles could alert each other to avoid collisions or share notices about passers-by and bicycles.

    From as far as several hundred metres away, vehicles could exchange messages with one another or receive information from roadside units（RSUs）about nearby incidents or dangerous road conditions through 4G network A high level of A1 seems required for such vehicles, not only to self-drive from A to B, but also to react intelligently to messages received. Vehicles will need to plan, reason, strategize and adapt in the light of information received in real time and to carry out cooperative behaviours. For example, a group of autonomous vehicles might avoid a route together because of potential risks, or a vehicle could decide to drop someone off earlier due to messages received, a foreseen crowding ahead.

    Further applications of vehicle-to-vehicle communication are still being researched, including how to perform cooperative behaviour.

    Today's post is almost about signs in English. You will see signs on the road while driving or when walking down a street. Now let's take a closer look at the signs in the picture below, so you can fully understand what they mean in case you come across one of them.

    Starting with the top row, we have a:

    Yield sign—This sign indicates (标示) that you need to slow down ,but you may not have to come to a full stop.

    Crosswalk—This is a sign that indicates people have the right of way to cross the street, so cars have to stop when they see a person waiting next to one of these signs.

    Second row:

    Do not enter—This sign indicates you are not allowed to enter a road at that point.

    Buckle up(系好安全带)!— There are often signs on roads in the United States reminding people that wearing seat belts(安全带) is mandatory (强制的) (seat belt laws differ depending on what state you are in ,but all US states have seat belt laws).

    Third row:

    Be alert (警惕的) for bears—This is another sign that is used to indicate to drivers and pedestrians (行人) that they should be alert for wildlife in the area.

Playground—This is the sign used to alert drivers that there is a playground nearby, so it is a good idea to slow down and watch for children.

    FITNESS CENTRE

    The fitness centre offers a variety of activities for members of all ages throughout the week.

    Activities for Monday 12 July, 2017:

    Learn to swim. Classes for preschool children aged five and under start at 10:00 am. Classes last 30 minutes and parents must attend with their children. Don't forget to book in advance, as places are limited, and to pack some warm clothes for after the lesson.

    Woman's aerobics (有氧运动). Sessions are for one hour and begin at 10:45 am, led by Melissa. Come along and join us every Monday for an exhilarating hour of exercise and fun. Leave your kids at the nursery and take time out for yourself. Wear a track-suit or something similar.

    Lunchtime yoga. Take a break at lunchtime (1:00—2:00 pm) for an hour of meditation and yoga. Enjoy the peace and quiet of our meditation room, and relaxing sessions designed for active people with busy lives. Use your own mat for floor work or hire one from us for a small sum.

    Family Shootaround. 10:00—5:30 pm. Family Shootaround is open for members and guests to bring the family out for basketball. Half court games are only during this time. There are no full court games during Family Shootaround hours. All participants must sign in at the front desk and wear a wristband during the play.

    A survey has shown that what you do on a plane can be determined by which nationality is listed on your passport.

    According to the results of an international passenger survey, Australians are the biggest drinkers on board with 36 percent choosing to down the hatch, compared to 35 percent of Americans and 33 percent of Brits.

    The Airline Passenger Experience Association(APEX) spoke to around 1,500 people, aged 18 and older, who have traveled by plane at least once during the last three months and were living in the United States, United Kingdom, Germany, Japan, China, Singapore, Australia and Brazil.

The results found Chinese travelers are most likely to nod off once the seat-belt sign switches off. They are also the first to take out their credit card for some in-flight shopping and the biggest fans of gaming. Americans on the other hand like to use their time in the air more productively—- when not drinking—- choosing to work while flying at 35,000 feet.

Meanwhile, Brits and Germans are the best at making chat with random strangers—-spending 50 percent more time than any other nationality. Comparatively, Brazilians conduct their conversations online via email, messaging apps or social media.

    Despite plane food having a bad reputation, seven out of ten interviewees said they were happy to eat up on the selection of in-flight snacks and meals. In-flight magazines were also popular with four out of five passengers.

    The international flyers did however express their desire for better in-flight entertainment. “The industry has greatly improved the comfort, entertainment and onboard service, and passengers are accepting those improvements” said Russell Lemieux, APEX executive director. “At the same time, passengers are demanding more from their air travel experiences which will drive more improvements touching all aspects of the journey.” he added.

    David Brown and Anne are two patients in the Adult Day Care Program at Mercy Hospitals. David Brown is seventy-two years old. He's friendly and likes to talk. He lives with his wife in the city. But David is becoming forgetful. His wife says, “He'll heat up some soup, then forget to turn off the gas.” She is sixty-one and still works. She is worried about leaving her husband alone.

    Anne is eighty and lives with her 60-year old daughter. Her daughter says that she needs a rest. “Mom follows me everywhere. She follows me when I read newspapers. I need a rest and she does, too.”

    And so, several times a week, David and Anne's families take them to the Adult Day Care Center. Many hospitals have this program, Patients come to the Center for a full or half day, from one to five days a week. All the patients live with their families and most are old people.

    Mrs. Carol Johnson is the director of the Center. She says, “We help the patients learn many things here. Patients have the chance to get out of their houses. Husbands, wives or grown children can work or have a rest. Most important of all, families are able to stay together.”

    LONDON­Britain prepares for a vote Thursday that will decide whether it leaves the European Union. The debate has centered on immigration and economic security. Both sides have lowered the tone of their arguments after a three­day suspension(暂停) of campaigning that followed the murder of an anti­Brexit lawmaker, an incident that polls(民意调查) suggest has shocked many previously undecided voters who now say they will vote to remain.

    These are uncertain times in a nation whose economy is the second largest in the European Union. The risks are huge. There are warnings that leaving the 28­member group may cause the British pound to lose 15 percent of its value and bring the resignation(辞职) of David Cameron, the country's prime minister; his stay or not depends on whether Britain listens to him and votes to remain.

    For months, the Leave campaign has been hitting the streets. Its arguments are based largely on immigration, and the belief that Britain has handed control of its borders(边界) to a European super state: "The U.K. has lost control over migration. We have to accept anyone into this country if they have an EU passport, no matter if they have a criminal record or not. We are not allowed to say 'no' to people and that is damaging for the security of the U.K., but it is also putting pressure on jobs and opportunities for young people," said Tom Harwood, a Brexit campaigner.

    The murder of Jo Cox, an anti­Brexit, pro­immigrant lawmaker by a far right extremist(极端分子) with a history of mental problems had a serious effect on both campaigns, and on voters.

    Polls since the June 16th murder showed the Leave camp losing ground, but with both sides still very close on a referendum(全民投票) that many believe could change the course of European history.