Since the mid-1990s, both domestic and international tourism in China has grown rapidly in many destinations. In particular, city tourism plays an important role as a major destination in regional tourism development. To promote tourism, understanding image and promotion has become the key point in the development of regional tourism economy. Tour cities image advertising videos, the most visual description and most vivid illustration, have been one of the most important means in the images advertising videos of city destinations. Based on the internet, this article takes advertising videos of main tour cities in China as research data, acquires methods of movie reviews, and studies the content and techniques of the photographers. Moreover, this author puts forward suggestions on the images advertising videos of tour cities from the angles of subjects, contents and techniques of shooting.

To solve the problem of low material utilization in traditional stretch forming process, a flexible stretch forming method was proposed, which can be realized by interaction of the multi-point stretch forming die with discrete-gripper stretch forming machine. The principle and characteristics of sheet metal flexible stretch forming technology was introduced, structural composition and working principle of the multi-point stretch forming die and discrete-gripper stretch forming machine were expounded, and the technology experiments was carried out with a self-designed flexible stretch forming technology equipment for sheet metal. The experimental results indicate that structure of multi-point stretch forming die and discrete-gripper stretch forming machine are reasonable, and flexible stretch forming technology can be realized by above-mentioned die and machine, stretch forming parts has a good quality and its shape error can satisfy requirements of production.

To send the very low frequency signals, the length of antenna must attend one-half of a wavelength, maybe more than 8,000 meters sometimes. And the projection of the antenna on plumb line must exceed seventy percent of the antenna’s whole length. So the dynamic character and control of trailing antenna on a aircraft is one of most inmportant problems which need to research. The steady dynamic is the base of the dynamic character and control. The mathematics model of the trailing antenna is founded,and sloved via a shooting technique. The inflences of the angle of bank and the velocity of aircraft to the the end radius and verticality are reached. The result shows:under the low drag,for certain ranges of the angle of bank and the velocity ,the equilibruim solution is multivalued.

The article puts forward a method for calculating the arresting force of carrier aircraft in the case the aircraft meets the cable off-center and the aircraft motion is unsymmetrical. The condition under which the hook will or will not slip on the cable is considered. Based on a great deal of numerical results, the article analyzed the impact of unsymmetrical motion and off-center on landing dynamics of carrier aircraft.