Abstract: A computer implemented method for evaluating examination responses includes receiving, with an examination evaluation server, an examination response, tokenizing the examination response into one or more n-word segments, extracting, from the response, a set of construct-relevant features indicating one or more scoring metrics, generating a set of scoring rules, and generating a score estimate as a function of one or more scoring rules from the set of scoring rules and one or more of the scoring metrics.

Abstract: A computer implemented method for identifying and removing similar examination items in a digital examination includes obtaining, with an examination evaluation server, a digital examination with a plurality of examination items, tokenizing a first examination item of the plurality of examination items into a first set of n-grams, tokenizing a second examination item of the plurality of examination items into a second set of n-grams, generating a first item vector from the first set of n-grams, generating a second item vector from the second set of n-grams, generating multiple item congruence values for corresponding similarity dimensions by comparing the first item vector with the second item vector, and identifying that the first and second examination items are a potential enemy item pair if one or more of the item congruence values exceed corresponding threshold values.

Abstract: A computer implemented method of examination scoring includes receiving, with an examination evaluation server, a language corpus with a plurality of corpus words, deriving, for each corpus word, a corpus sematic vector within a multi-dimensional semantic vector space, receiving first and second examination responses, tokenizing each examination response into a plurality of response words, identifying a set of matching response words from the plurality of response words from each examination response, identifying a set of semantic vectors corresponding to the matching response words for each examination response, and comparing the semantic vectors from the first examination response with the semantic vectors from the second examination response to derive a response semantic similarity value for use as an input for automated scoring.

Abstract: A computer implemented method for identifying and removing similar examination items in a digital examination includes obtaining, with an examination evaluation server, a digital examination with a plurality of examination items, tokenizing a first examination item of the plurality of examination items into a first set of n-grams, tokenizing a second examination item of the plurality of examination items into a second set of n-grams, generating a first item vector from the first set of n-grams, generating a second item vector from the second set of n-grams, generating multiple item congruence values for corresponding similarity dimensions by comparing the first item vector with the second item vector, and identifying that the first and second examination items are a potential enemy item pair if one or more of the item congruence values exceed corresponding threshold values.

Abstract: A computer implemented method for detecting linguistic uniqueness includes receiving, with an examination evaluation server, a list of word n-grams and corresponding frequency values indicating the frequency at which each word n-gram appears in a language corpus, receiving an examination response with one or more sentences, tokenizing the sentences into a plurality of words or phrases, combining contiguous words or phrases into n-word segments, and identifying, for each n-word segment that matches a matching word n-gram from the list, the frequency value corresponding to the matching word n-gram.

Abstract: Disclosed is an engine surge avoidance system and method which adapts the acceleration schedules (i.e., P2.5 bleed valve and NDOT) to prevent engine surge events from occurring while minimizing reductions in engine response time. The surge avoidance system and method disclosed herein achieves this goal by adapting both the NDOT and the P2.5 bleed schedules in an optimum fashion.

Abstract: Disclosed is an engine surge avoidance system and method which adapts the acceleration schedules (i.e., P2.5 bleed valve and NDOT) to prevent engine surge events from occurring while minimizing reductions in engine response time. The surge avoidance system and method disclosed herein achieves this goal by adapting both the NDOT and the P2.5 bleed schedules in an optimum fashion.

Abstract: A method and apparatus is disclosed for synthesizing a fuel flow and a metering valve position used in a fuel control system of a turbomachine. Various construction details have been developed which provide a method to manipulate conventional turbine engine parameters to generate a synthesized fuel flow signal and metering valve position signal. In one embodiment, a synthesis means includes means to sense temperature, pressure and high pressure shaft speed, and means to manipulate the sensed signals to generate a synthesized fuel flow. A function generator responds to the synthesized fuel flow signal to generate a synthesized metering valve position signal.

Abstract: An apparatus is disclosed for a fuel control system of a turbine engine powerplant. Various construction details have been developed which provide means to generate a backup command current for controlling the fuel flow rate to the turbine engine powerplant. In one embodiment, a means to generate a backup command current includes means to convert a fuel flow derivative to a backup command current using known hardware characteristics and an estimated null bias signal. The backup command current is input to a switch along with a command current generated by comparing a reference signal to a feedback signal from a metering valve. The switch responds to means for failure recognition which detects failures in the sensing of the feedback signal. The switch responds to a failure of the feedback signal by inputting the backup command current to a torque motor for controlling a metering valve position.