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With the development of computer and network techniques, and the digital Chinese news texts explosion, facing a massive unstructured news data, a better way for knowledge extraction and storage, on the one hand, can help readers understand the core content of news, on the other hand, completed news knowledge accumulation will support the reportage. In recent years, information extraction technology...
In recent years the quadratic program (QP) is applied for the blind signal detection of the time-varying OFDM systems. The minimum solution of the QP is obtained by means of exhaustive search in the vector space, which often involves large and nondeterministic complexity. In this paper, we derive some formulas describing the probability information about the received PSK-type signals. With these formulas,...
It has an important significance to promote the Beijing forestry development and strengthen forest resources management for study on Beijing forest measurement model of risk assessment. This paper has studied on forest measurement model of risk assessment in Beijing used probability regression method. The results show that: Beijing forest fires and forestry production value has a certain relationship,...
In this paper, a construction of Cartesian authentication codes from vector space over finite fields is presented and its size parameters are computed. Under the assumption that the choose of encoding rules and source states obeys uniform probability distribution, the probabilities PI of a successful impersonation attack and PS of a successful substitution attack of these codes are also computed.
In recent years the quadratic program (QP) is applied for the blind signal detection of the time-varying OFDM systems. The minimum solution of the QP could be obtained through the class of the sphere decoder (SD) algorithm, which is equivalent to the tree search approach. In this paper, we derive some formulas describing the probability information about the received signal. With these formulas, a...
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