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This paper presents a configuration scheme of multiple MEMS reaction wheels for CubeSat. In this configuration three pairs of arrays of MEMS reaction wheels are installed symmetrically within the CubeSat's surface, wherein each array is composed by 4 × 4 co-rotating elements. Through counter-rotating of each pair of symmetrical arrays three zero momentum wheels are achieved. Assuming that control...
Fractal coding has been proved useful for image compression. It is also be proved effective for image retrieval based on content. We generate image index file utilize fractal image code, also define the distance between two images as the measure standard for matching similar image. Differently with image compression we don't pay more attention on image compression ratio, but more care about the costing...
The state-owned forests in Heilongjiang province made significant contribution to China's economic development, but with a huge price of serious ecological deterioration. So modern forestry construction of the state-owned forest focuses on strengthening the modern forestry ecological system. The key is the selection of key areas of ecological system. This paper takes Yichun state-owned forest for...
The construction of modern forestry is the general task to China's forestry work. It is a system engineering involving China's forestry ecological, economic, social and cultural development as well as institutional mechanisms reforming and so on. It is an important means of accelerating the pace of modern forestry through establishing scientific and rational, highly operative modern forestry statistical...
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