The second speaker was a fellow initiate , mr . liu pei - xin , former technology director of the german firm essen technologies and now a ph . d . student in computer science at ntsu , whose talk was entitled relaxation improves learning efficiency and happiness enhances inner talents . brother liu supported his argument with brain wave theories and learning approaches , pointing out that a focused mind and positive mental attitude can increase learning efficiency 第二位演讲者是前怡申科技技术总监目前就读于清华大学资工所博士班的刘培欣同修。刘师兄的演讲主题是轻松增进学习效率，快乐发展潜在才华，他以脑波的角度切入，由学习心法来说明如何才能增进学习效率与发展潜在才华。
Beijing essen weld ing & cutting fair is the window for chinese welding machine enterprises to know the trend of world welding industry , the classroom to study international advanced welding technology , the platform for international ex change and arena for chinese welding com pa nies to join the world market competition 大家的感受是一样的，北京?埃森焊接展是中国电焊机企业了解世界焊接行业发展的窗口，是学习国际先进焊接技术的课堂，是开展与国际同行交流合作的平台，也是我们企业参与全球焊接市场竞争的舞台。
