A method, system, and non-transitory compute readable medium for vector representation of a sequence of items, including receiving a sequence of items from a source, producing a first distributed representation for each item of the sequence, wherein the distributed representation comprises a word vector and a class vector, partitioning the sequence of items into classes, and training the received sequence using the first distributed representation, such that a new distributed representation is produced for which the vector entries of the new distributed representation are amplified when the vector entries of each item correspond to a class of an item to be explained and fractionalizing vector entries of each item that do not correspond to the class of the item to be explained.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A method for vector representation of a sequence of items, the method comprising: receiving a sequence of items from a source; producing a first distributed representation for each item of the sequence, wherein the first distributed representation comprises a word vector and a class vector; partitioning the sequence of items into classes; and training the received sequence using the first distributed representation, such that a new distributed representation is produced for which the vector entries of the new distributed representation are amplified when the vector entries of each item correspond to a class of an item to be explained and fractionalizing vector entries of each item that do not correspond to the class of the item to be explained. 2. The method of claim 1, wherein the amplifying the vector entries is performed by multiplying the vector entries by a factor greater than one, and wherein the fractionalizing the vector entries is performed by multiplying the vector entries by a factor greater than zero and less than one. 3. The method of claim 1, further comprising: for the item to be explained for each dimension, producing a first set of items of whose word vector entries for the dimension include positive integers and a second set of items of whose vector entries for the dimension include negative integers; sorting each set of items according to the absolute values from a highest value to a lowest value of the entries of the word vectors for the dimension and retaining a predetermined number of the vectors corresponding to the highest value; for each set, calculating an average vector for the first set of word vectors and normalizing the average vector to have a length of one; and locating an item for which the word vector has a cosine distance highest from the average vector as representative of a set. 4. The method of claim 3, wherein the positive items are relevant for explaining the item if the dimension entry is the positive integer in the word vector of the item following the training, and wherein the negative items are relevant if the dimension entry is the negative integer in the word vector of the item following the training. 5. The method of claim 1, further comprising: determining a dimension and outputting positive group items and negative group items associated with the dimension. 6. The method of claim 1, further comprising: partitioning items into classes based on the word vector; for each class, keeping a word representative vector; and obtaining dominant items based on the items in each class with a highest cosine distance to the word representative vector. 7. The method of claim 1, wherein after the producing, an absolute value of the largest vector dimension comprises the dominant dimension. 8. A non-transitory computer-readable recording medium recording a vector representation program for vector representation of a sequence of items, the program causing a computer to perform: receiving a sequence of items from a source; producing a first distributed representation for each item of the sequence, wherein the first distributed representation comprises a word vector and a class vector; partitioning the sequence of items into classes; and training the received sequence using the first distributed representation, such that a new distributed representation is produced for which the vector entries of the new distributed representation are amplified when the vector entries of each item correspond to a class of an item to be explained and fractionalizing vector entries of each item that do not correspond to the class of the item to be explained. 9. The non-transitory computer-readable recording medium of claim 8, wherein the amplifying the vector entries is performed by multiplying the vector entries by a factor greater than one, and wherein the fractionalizing the vector entries is performed by multiplying the vector entries by a factor greater than zero and less than one. 10. The non-transitory computer-readable recording medium of claim 8, further comprising: for the item to be explained for each dimension, producing a first set of items of whose word vector entries for the dimension include positive integers and a second set of items of whose vector entries for the dimension include negative integers; sorting each set of items according to the absolute values from a highest value to a lowest value of the entries of the word vectors for the dimension and retaining a predetermined number of the vectors corresponding to the highest value; for each set, calculating an average vector for the first set of word vectors and normalizing the average vector to have a length of one; and locating an item for which the word vector has a cosine distance highest from the average vector as representative of a set. 11. The non-transitory computer-readable recording medium of claim 10, wherein the positive items are relevant for explaining the item if the dimension entry is the positive integer in the word vector of the item following the training, and wherein the negative items are relevant if the dimension entry is the negative integer in the word vector of the item following the training. 12. The non-transitory computer-readable recording medium of claim 8, further comprising: determining a dimension and outputting positive group items and negative group items associated with the dimension. 13. The non-transitory computer-readable recording medium of claim 8, further comprising: partitioning items into classes based on the word vector; for each class, keeping a word representative vector; and obtaining dominant items based on the items in each class with a highest cosine distance to the word representative vector. 14. The non-transitory computer-readable recording medium of claim 8, wherein after the producing, an absolute value of the largest vector dimension comprises the dominant dimension. 15. A vector representation system for vector representation of a sequence of items, the system receiving the sequence of items from a source, the system comprising: a first distributed representation device configured to produce a first distributed representation for each item of the sequence, the first distributed representation including a word vector and a class vector; a first partitioning device configured to partition the sequence of items into classes; and a first training device configured to train the received sequence using the first distributed representation, such that a new distributed representation is produced for which the vector entries of the new distributed representation are amplified when the vector entries of each item correspond to a class of an item to be explained and fractionalizing vector entries of each item that do not correspond to the class of the item to be explained. 16. The system of claim 15, wherein the amplifying the vector entries is performed by multiplying the vector entries by a factor greater than one, and wherein the fractionalizing the vector entries is performed by multiplying the vector entries by a factor greater than zero and less than one. 17. The system of claim 15, further comprising: for the item to be explained for each dimension, a first set producing device configured to produce a first set of items of whose word vector entries for the dimension are positive and a second set of items of whose vector entries for the dimension are negative; a first sorting device configured to sort each set of items according to the absolute values from a highest value to a lowest value of the entries of the word vectors for the dimension and retaining a predetermined number of the vectors corresponding to the highest value; a first averaging device configured to calculate, for each set, an average vector for the first set of word vectors and normalizing the average vector to have a length of one; and a first locating device configured to locate an item for which the word vector has a cosine distance highest from the average vector as representative of a set. 17. The system of claim 17, wherein the positive items are relevant for explaining the item if the dimension entry is positive in the word vector of the item following the training, and wherein the negative items are relevant if the dimension entry is negative in the word vector of the item following the training 19. The system of claim 15, further comprising: a first output device configured to output a dimension for positive group items and negative group items associated with the dimension. 20. The system of claim 15, wherein after the producing, an absolute value of the largest vector dimension comprises the dominant dimension.