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TM65m radio telescope Ku and Ka-band antenna pointing, subreflector model, efficiency, sensitivity, and system noise temperature performance are reported in this paper. The key indicators of radio astronomy receiving system are introduced firstly. Secondly the band measurement essential points are discussed these are point and sub-reflector model construction and atmosphere influence. The antenna efficiency, sensitivity and system noise temperature of the two bands are described finally. The measurement results show that in the Ku and Ka-band, in the middle of the elevation, Ku-band efficiency can be controlled to 60%, Ka-band can be controlled to 38%. And in the higher and lower elevations, there is a significant decline in the efficiency since the main surface deformation.

Micro-electromechanical Systems (MEMS) IMU/ LADAR integrated navigation is a new-type autonomous navigation and environment detection method. It has a broad application prospect in the indoor environment. In MEMS IMU/LADAR integrated navigation system, the MEMS inertial sensors are used to measure vehicle movement. The LADAR is used to detect environmental features, and their outputs are fused by a digital filter, to provide precise position and environment mapping information for small rotorcraft. However, with the increasing amounts of observed landmarks, the computation complexity of traditional Extended Kalman Filter (EKF) increase excessively, making it unable to meet the realtime navigation requirement for small rotorcraft. In addition, the existing LADAR is generally planar scanning radar. When the aircraft's attitudes change, there is no guarantee that detecting plane maintains in a horizontal plane. This makes detecting information couple attitude angle measurement errors, and would bring great errors to the integrated navigation results. According to the problems mentioned above, the paper proposes the LADAR's attitude angle coupling error compensation algorithm. The navigation filter is designed based on Compressed-EKF(CEKF) algorithm. And the experimental prototype is designed for MEMS IMU/LADAR integrated navigation system, to verify CEKF algorithm in indoor environment. The tests show that the proposed algorithm can effectively improve the LADAR's precision and decrease the calculation amount of filtering algorithm. The research has significant reference value for small rotorcraft's simultaneous location and mapping (SLAM) technology in the structured indoor environment.

The graduation project is the final link of higher education. Its quality is the embodiment of the teaching quality of a university, is the comprehensive application embodiment of specialty knowledge ability learned by students, and also is the evaluation of university graduate's quality. The current employment situation of college students is worrying. Integration of graduation design and employment is proposed based on the status of graduation design and employment of undergraduates. And specific measures in civil engineering are discussed. The method of team coaching is one of the ways to resolve this principal contradiction, to share high-quality educational resources and to improve thesis quality of undergraduates majoring in science and technology. It can offer ideas for instructors of civil engineering and will be helpful for graduate employment.

Combining with features of industrial design and applying development and trend of CAD in modern industrial design, this paper submits that it's necessary to introduce Pro/E into engineering graphics, and the active effect which Pro/E plays in the teaching of engineering drawing.

The traditional content-based image retrieval system can not meet the users’ needs due to the ‘semantic gap’ between low-level features and the richness of human semantics. In an attempt to narrow the ‘semantic gap’, an approach which combines region-based image retrieval (RBIR) and relevance feedback (RF) with semantic color and spatial location features is presented in this paper. This method segments images into homogeneous regions and gives name for each region. In addition, the importance of each region is also taken into account. The Earth Mover’s Distance (EMD) is employed to measure the image similarity. To further improve the efficiency and accuracy of retrieval system, relevance feedback techniques are introduced in this paper. Experimental results on 1000 images database demonstrate the effectiveness and the efficiency of our approach is encouraging.

A novel indexing and retrieval methodology based on object region that integrates color, texture, and shape feature is proposed in this paper. The major problem in developing this method is the difficulty of segmenting object region from the image. To overcome this difficulty, dual wavelet transform (DWT) is used to detect salient object region in the image. Gabor filter is used to extract texture feature and three normalized inertias are used to describe shape feature. A similarity formula is developed to index image integrating three features. In order to further improve the retrieval speed, a fuzzy clustering algorithm is developed and employed to significantly save query time without compromising the retrieval precision. Experimental results demonstrate that this method has better performance in terms of retrieval efficiency than the method using single feature or total image s features, and has faster speed than other similar retrieval system.