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This paper introduces a time-hopping (TH) system for rapid on-off-division duplex (RODD), with this method, virtual full-duplex communication at the frame transmission level can be realized. However because of the randomness of the transmission timing, the slots may have a collision with a high probability. So it's very important to establish a model to calculate the collision ratio, and analyze the...
The scale operation in various forms of rural land circulation in China is the way for the development of modern agriculture, and is also the basic direction of agricultural reform. The right to rural land contractual management registration makes the position of cadastral land and its interrelated information, as contractor and area, clear by Geographic Information Systems (GIS). That supplied a...
Direct sequence spread spectrum (DSSS) signals are now widely used for communications, as well as for multiple access. DSSS transmitters use a spreading sequence to modulate the baseband signal before transmission. A receiver which does not know the spreading sequence cannot demodulate the signal. In the paper, we propose a method which can estimate the spreading sequence in a non-cooperative context...
Herba Epimedii is a well-known traditional Chinese medicine (TCM) having the effect of nourishing the kidney and strengthening the ‘Yang’. Its primary effective constituents are considered to be the 8-prenyl flavonols, which can be assorted into 4′-methoxyl-prenylflavonols (MPFs) and 4′-hydroxyl-prenylflavonols (HPFs), according to the group (methoxyl or hydroxyl) located at 4′ in their structures...
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