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  2. List of language proficiency tests - Wikipedia

    en.wikipedia.org/wiki/List_of_language...

    The following is a non-exhaustive list of standardized tests that assess a person's language proficiency of a foreign/secondary language. Various types of such exams exist per many languages—some are organized at an international level even through national authoritative organizations, while others simply for specific limited business or study orientation.

  3. UK Border Agency - Wikipedia

    en.wikipedia.org/wiki/UK_Border_Agency

    The agency attained full agency status on 1 April 2009. Immigration Officers and Customs Officers retained their own powers for the enforcement and administration of the UK's borders, although management of the new organisation was integrated and progressively officers were cross trained and empowered to deal with customs and immigration matters at the border.

  4. Discrete cosine transform - Wikipedia

    en.wikipedia.org/wiki/Discrete_cosine_transform

    A discrete cosine transform (DCT) expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies.The DCT, first proposed by Nasir Ahmed in 1972, is a widely used transformation technique in signal processing and data compression.

  5. Zero-sum game - Wikipedia

    en.wikipedia.org/wiki/Zero-sum_game

    The picture on the left shows that a typical example of a zero-sum three-person game. If Player 1 chooses to defence, but Player 2 & 3 chooses to offence, both of them will gain one point. At the same time, Player 1 will lose two-point because points are taken away by other players, and it is evident that Player 2 & 3 has parallelism of interests.

  6. Mobile telephony - Wikipedia

    en.wikipedia.org/wiki/Mobile_telephony

    Mobile phone tower Mobile telephone antennas tower. Mobile telephony is the provision of wireless telephone services to mobile phones, distinguishing it from fixed-location telephony provided via landline phones.

  7. Probabilistic neural network - Wikipedia

    en.wikipedia.org/wiki/Probabilistic_neural_network

    A probabilistic neural network (PNN) [1] is a feedforward neural network, which is widely used in classification and pattern recognition problems.In the PNN algorithm, the parent probability distribution function (PDF) of each class is approximated by a Parzen window and a non-parametric function.