KRQA
RQA may refer to: * Ruoqiang Loulan Airport, IATA code RQA * Recurrence quantification analysis * Research Quality Association The Research Quality Association (RQA) is a not for profit membership association. Formerly known a Quality Assurance Group UK (QAG UK) and the British Association of Research Quality Assurance (BARQA), the association changed its name to RQA in D ...

Ruoqiang Loulan Airport
Ruoqiang Loulan Airport is an airport serving Ruoqiang County in Bayingolin Mongol Autonomous Prefecture, Xinjiang, China. It received approval from the State Council of China and the Central Military Commission in March 2014. The airport is located in Xitatirang Village (), west of the county seat Ruoqiang Town. Construction began in November 2015, with an investment of 546 million yuan. The airport was opened on 29 March 2018, and became the 20th airport in Xinjiang. Facilities The airport has a runway that is and (class 4C), and a terminal building. It is projected to handle 120,000 passengers and 480 tons of cargo annually by 2020. Airlines and destinations See also *List of airports in China *List of the busiest airports in China China's busiest airports are a series of lists ranking the 100 busiest airports in Mainland China according to the number of total passengers, including statistics for total aircraft movements and total cargo movements, following the ...
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Recurrence Quantification Analysis
Recurrence quantification analysis (RQA) is a method of nonlinear data analysis (cf. chaos theory) for the investigation of dynamical systems. It quantifies the number and duration of recurrences of a dynamical system presented by its phase space trajectory. Background The recurrence quantification analysis (RQA) was developed in order to quantify differently appearing recurrence plots (RPs), based on the small-scale structures therein. Recurrence plots are tools which visualise the recurrence behaviour of the phase space trajectory \vec(i) of dynamical systems: :(i,j) = \Theta(\varepsilon - \, \vec(i) - \vec(j)\, ), where \Theta: \mathbf \rightarrow \ is the Heaviside function and \varepsilon a predefined tolerance. Recurrence plots mostly contain single dots and lines which are parallel to the mean diagonal (''line of identity'', LOI) or which are vertical/horizontal. Lines parallel to the LOI are referred to as ''diagonal lines'' and the vertical structures as ''vertical lines ...
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