【正文】 the ball was the objective. To score, the ball had to be shot through a horizontal, elevated goal. The team with the most points at the end of an allotted time period wins. Early in the history of basketball, the local YMCAs provided the gymnasiums, and membership in the anization grew rapidly. The size of the local gym 。s Christian Association (YMCA), which later became Springfield College. Naismith (18611939) was a physical education teacher who was seeking a team sport with limited physical contact but a lot of running, jumping, shooting, and the handeye coordination required in handling a ball. The peach baskets he hung as goals gave the sport the name of basketball. His students were excited about the game, and Christmas vacation gave them the chance to tell their friends and people at their local YMCAs about the game. The association leaders wrote to Naismith asking for copies of the rules, and they were published in the Triangle, the school newspaper, on January 15,1892. Naismith39。s ball is in (7274 cm) in circumference. The covering of the ball is leather, rubber, position, or synthetic, although leather covers only are dictated by rules for college play, unless the teams agree otherwise. Orange is the regulation color. At all levels of play, the home team provides the ball. Inflation of the ball is based on the height of the ball39。s National Basketball Association (WNBA) playoffs. And it has also made American heroes out of its player and coach legends like Michael Jordan, Larry Bird, Earvin Magic Johnson, Sheryl Swoopes, and other great players. At the heart of the game is the playing space and the equipment. The space is a rectangular, indoor court. The principal pieces of equipment are the two elevated baskets, one at each end (in the long direction) of the court, and the basketball itself. The ball is spherical in shape and is inflated. Basketballs range in size from in (7276 cm) in circumference, and in weight from 1822 oz (510624 g). For players below the high school level, a smaller ball is used, but the ball in men39。t e naturally or easily to them, and so they are trying to follow a predetermined set of rules. Some individuals with autism have normal intelligence, and many have special talents in areas such as music or memory. However, individuals with autism may have other mental or emotional problems that coexist with their autism. Some of these other disorders may include impulse control disorders, obsessivepulsive disorder , mood and anxiety disorders, and mental retardation . PSYCHOLOGICAL AND FAMILY FACTORS. Although Henry Maudsley, in the late 1800s, was the first psychiatrist to focus on very young children with mental disorders, it was the psychiatrist Leo Kanner who coined the phrase early infantile autism in 1943. Kanner believed that the parents of children with autistic behaviors were emotionally cold and intellectually distant. He coined the term refrigerator parents to describe them. His belief that parental personality and behavior played a powerful role in the development of autistic behaviors left a devastating legacy of guilt and selfblame among parents of autistic children that continues to this day. Recent studies are unequivocal, however, in demonstrating that parents of autistic children are no different from parents of healthy children in their personalities or parenting behaviors. In fact, many families with an autistic child also have one or more perfectly healthy children. Because autistic children can be extremely sensitive to change, any change within the family situation can be potentially traumatic to the autistic child. A move, divorce, birth of a sibling or other stressors that occur in the lives of most families may evoke a more extreme reaction from an autistic child. While there is no single neurological abnormality found in children with autistic disorders, some research using noninvasive brain imaging techniques such as magic resonance imaging (MRI) suggests that certain areas of the brain may be involved. Several of the brain areas being researched are known to control emotion and the expression of emotion. These areas include the temporal lobe (large lobe of each side of the brain that contains a sensory area associated with hearing), the limbic system, the cerebellum, the frontal lobe, the amygdala, and the brain stem, which regulates homeostasis (body temperature and heart rate). Recent research has focused particularly on the temporal lobe because of the finding that previously healthy people who sustain temporal lobe damage 自動售貨機控制系統(tǒng)的設計與仿真 30 may develop autisticlike symptoms. In animal research, when the temporal lobe is damaged, social behavior declines, and restless, repetitive motor behaviors are mon. When measured by MRI, total brain volume appears to be greater for those with autistic disorders. Other neurological factors include lesions to the brain, congenital rubella, undiagnosed and untreated phenylketonuria (PKU), tuberous sclerosis, and Rett39。在以后的日子里，我將會更加的努力去面對生活中所遇到的各種挑戰(zhàn)。最后，祝愿所有老師身體健康， 桃李天下；祝愿所有同學前程似錦，工作順利。 在此，要首先感謝在本次畢業(yè)設計過程中從選題開始到論文的完成一直給我很大幫助的段老師，正是因為段老師耐心的幫助，我才能更好的完成課題中的設計及論文的編寫。 自動售貨機控制系統(tǒng)的設計與仿真 28 致謝 回首大學四年，雖有遺憾卻也無悔。在本系統(tǒng)中，只設定了一種商品，商品選擇功能不完善；購買商品后的結(jié)算方式比較單一，只能現(xiàn)金支付，缺少例如 IC 卡支付等智能支付方式。 通過對整個系統(tǒng)的功能測試發(fā)現(xiàn)該自動售貨機的工作是比較穩(wěn)定和可靠的，而且操作簡單明了，具有很大的實用性。 （ 3） 利用 vhdl 語言輸入的方式，對子模塊進行了詳細的軟件的設計，并且對其完成了相應的功能仿真測試，并且 對每次的仿真結(jié)果進行分析。 自動售貨機控制系統(tǒng)的設計與仿真 27 5 總結(jié) 隨著計算機技術(shù)和通信技術(shù)的發(fā)展，自動售貨機的發(fā)展方向也必將向著 更加智能化和人性化的礎上，從顧客的實際需要出發(fā)，本文在分析了自動售貨機的特點后，完成了自動售貨機控制系統(tǒng)的設計，在設計的過程中，主要完成了以下幾個方面的工作； （ 1） 對自動售貨機的發(fā)展技術(shù)進行了總結(jié)和歸納，經(jīng)過總結(jié)可以發(fā)現(xiàn)節(jié)能環(huán)保是現(xiàn)在起發(fā)展的一個重要方向，同時，移動商務也是其發(fā)展的一個目標方向。系統(tǒng)操作完成，等待下一次的操作。元件例化是 vhdl 設計實體完成自上而下層次化設計的一種途徑。在程序中利用 ponent 語句對準備調(diào)用的元件做了聲明，并利用 1~11 十一個信號作為系統(tǒng)的內(nèi)部連線。圖中可以看出，投入貨幣總額為 15 元，則 led1 應顯示 為 5， led2 應顯示為 1，根據(jù)