【正文】
an.Lou held a joint interview with 27 media, including China Daily, the first in a series of interviews entitled Chinese Media Along the Silk Road. The interviews will be in Shaanxi and Gansu provinces and the Xinjiang Uygur autonomous region, as well as Kazakhstan, Uzbekistan and Turkey.The media group held the first interview on Wednesday morning in Xi39。s public security bureau shows some 100 foreign visitors enjoyed the 72hour policy by the end of March, most of them from the United States, the United Kingdom and Germany. Chengdu also reported robust growth in its overall tourist industry last year. Official statistics show that it received some 150 million tourists last year, an increase of 28 percent from 2022. Around million came from abroad, an increase of 12 percent. Total revenue from tourism surpassed 133 billion yuan ($). During his visit to Kazakhstan in September, Chinese President Xi Jinping proposed that China and Central Asia join hands to build a Silk Road economic belt to boost cooperation. The idea has been widely echoed in Central Asian countries, being an encouraging blueprint for Chinese areas along the Silk Road that has linked Asia and Europe for more than 2,000 years. In the next three weeks, China Daily reporters will travel through the belt in China and in Kazakhstan, Uzbekistan and Turkey. They will show the progress and expectations of the countries, businesses and peoples on the route. Shaanxi the start of the ancient Silk Road has positioned itself as the new starting point for the development of the Silk Road Economic Belt, which will strengthen China39。s ancient indigenous religion, while Du jiang yan is considered to be the oldest functioning watercontrol project in the world. Chengdu ranked third in tourist facilities, management and services among 60 Chinese cities in a customer satisfaction survey released last year. But, Li added that efforts are still needed to develop more tourism products, improve English services and provide accurate translation of traffic signs and scenic billboards. Zhao Yun, chairwoman of British Chamber of Commerce Southwest China, told China Daily that his colleagues found the policy very convenient. A British client once flew here and stayed for just one day to check her ordered goods, she said. Zhao was born in Shanxi province, but she has lived in Chengdu for more than 10 years. My life was like a running race moving from place to place. I also lived in Beijing and Shanghai before, she said. But Chengdu is a place that you never want to leave once settling down. It is now my second hometown, she said. If the environment is further improved, the city will attract more people to visit and live, with the 72hour visafree policy and pelling conditions in transportation, culture, climate and cuisine, he said. Foreigners also gave positive feedback on the policy. A spokesman from Dell Inc said the pany has a global hub of operation in Chengdu, so the threeday visa has an immediate and positive influence on the pany39。s level of internationalization. The policy will also bring direct economic revenue, Li said. Chengdu has many cultural legacies and is also a paradise for panda lovers with the world39。煙臺工程職業(yè)技術(shù)學院畢業(yè)設(shè)計(論文)成績評定評審等級表38指導教師評審意見評語:評定等級: 指導教師(簽名):答辯小組意見評語:評定等級: 負責人(簽名):學院抽查意見評語:評定等級: 負責人(簽名):Visafree policy brings Chengdu biz, tourism boost. Making national headlines several times, Chengdu39。其次,感謝同學們對我的支持,在我進行資料查找時,是他們給了我信心和力量!總之,我的設(shè)計是老師和同學和我共同完成的結(jié)果,在設(shè)計的兩個月里,我們合作的非常愉快,他們教會了我許多道理,這是我人生的一筆財富,我再次向給予我?guī)椭睦蠋熀屯瑢W表示感謝!感謝西京學院的各位老師三年來對我們的教育!向在百忙之中評閱本方案并提出寶貴意見的各位評委老師表示最誠摯的謝意,同時向所有關(guān)心、幫助和支持我的老師和同學表示衷心的感謝,祝他們工作順利,萬事如意!由于本人的學識水平、時間和精力有限,文中肯定有許多不盡人意和不完善之處,我將在以后的工作、學習中不斷以思考和完善。35致 謝三年的大學學習生活轉(zhuǎn)眼即逝,求學經(jīng)歷的坎坷使我慢慢成熟,在學校的這段時間里,使我收獲很多,所經(jīng)歷的一切將讓我倍加珍惜未來的生活。此兩項都小于垂直度公差 ,故該項要求能保證。)也對槽深尺寸有影響,△T=++,△J、△G、△A 都對槽深無影響,因此 △D+△G+△A+△J+△T=(mm)尺寸 8 的公差(按 IT14 級)為 ,故尺寸 8mm 能保證;(4)槽的中心平面與 Ф26H7 孔軸線垂直度公差 ;影響該項要求的因素有:341)定位誤差△D= △y=;2)加工方法誤差△G=;3)夾具定位心軸 17 的軸線與夾具底面 A 的平行度公差,即△A=4)定位心軸 17 的軸線對定位側(cè)面 B 的垂直度公差 ,即△A=;而△J△T 都對垂直度無影響。因此有定位誤差,其中△B=、△y=(&d+&D)/2=(+)/2=(&d 為銷公差,&D 為工件公差) 。上述兩項誤差之和△D+△G+△A+△J+△T=(vmm)因此,尺寸 12177。;對此項要求有影響的是對刀塊側(cè)面到定位板 間的尺寸 10177。若工序某項精度不能被保證時,還需要夾具的有關(guān)技術(shù)要求作適當調(diào)整。(5)影響對刀精度的尺寸和公差;塞尺的厚度尺寸 2h8=22 。因此 a=10177。 和13177。(3)影響夾具在車床上安裝精度的尺寸和公差定位鍵與銑床工作臺 T 形槽的配合尺寸 14h6。(2)影響工件定位精度的尺寸和公差為工件內(nèi)孔與長銷 10 的配合尺寸為 Ф26H7g6 和擋銷的位置尺寸為 6177。32 夾具總圖上的尺寸、公差和技術(shù)要求下面以撥叉銑槽夾具為例給予說明。 夾具體與定位鍵為保證工件在工作臺上安裝穩(wěn)定,應按照夾具體的高寬比不大于 的原則確定其寬度,并在兩端設(shè)置耳座,以便固定。 夾緊方案根據(jù)工件夾緊的原則,除施加夾緊力外,還應在靠近加工面處增加一夾緊力,用螺母與開口墊圈夾壓在工件圓柱的左端面,而對著支撐板的夾緊機構(gòu)可采用鉤形壓板,使結(jié)構(gòu)緊湊,操作方便。(2)槽的中心平面與 Ф26H7 孔軸線垂直度的定位誤差 長銷31與工件的配合去 Ф26H7 g6,則 Ф26g6= (mm) Ф26H7=Ф25+ 0(mm)由于定位基準與設(shè)計基準重合,故基準不重合誤差為零。因此,加工尺寸 12177。 的定位誤差 采用 (c)所示定位方案時,E 面既是工序基準,又是定位基準,故基準不重合誤差為零。因此,防轉(zhuǎn)擋銷應放在位置 3 較好。擋銷放在位置 2 時,雖然距 Ф26H7 孔軸線較遠,但由于工件定位是毛面,因而定位精度也較低。對于防轉(zhuǎn)擋銷位置的設(shè)置,也是三種不同的方案。在對工件施加夾緊力 P 時,工件的變形也很小,且定位基準