National Institute of Information and Communications Technology

National Institute of Information and Communications Technology


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Patent
National Institute Of Information And Communications Technology | Date: 2017-05-10

[Problem] To realize collective measurement of ultrawide-band optical signals which have exceeded an electrical band limit. [Solution] This photodetection device (100) comprises: a time-delay adjustment means (10) into which is input an optical signal that is a detection object; an optical frequency comb generator (20) that generates an optical frequency comb; a photomixer (30) that photomixes optical signal series which are sequentially output from the time delay adjustment means (10) and which were subjected to time adjustment, and the optical frequency comb signal which is output from the optical frequency comb generator (20); and a photodetector (40) that detects the mixed signal output from the photomixer (30). The time delay adjustment means (10) performs time adjustment on the optical signal series so that each of the time adjusted optical signal series is photomixed with the optical frequency comb at different timings in the photomixer (30).


Patent
National Institute Of Information And Communications Technology | Date: 2015-06-02

To realize collective measurement of ultrawide-band optical signals which have exceeded an electrical band limit. This photodetection device (100) comprises: a time-delay adjustment means (10) into which is input an optical signal that is a detection object; an optical frequency comb generator (20) that generates an optical frequency comb; a photomixer (30) that photomixes optical signal series which are sequentially output from the time delay adjustment means (10) and which were subjected to time adjustment, and the optical frequency comb signal which is output from the optical frequency comb generator (20); and a photodetector (40) that detects the mixed signal output from the photomixer (30). The time delay adjustment means (10) performs time adjustment on the optical signal series so that each of the time adjusted optical signal series is photomixed with the optical frequency comb at different timings in the photomixer (30).


Patent
National Institute Of Information And Communications Technology, Sumitomo Electric Industries and Kyushu University | Date: 2016-07-13

Problem to Be Solved: to provide a chromophore having a far superior nonlinear optical activity to conventional chromophores and to provide a nonlinear optical element comprising said chromophore. Solution: a chromophore comprising a donor structure D, a -conjugated bridge structure B, and an acceptor structure A, the donor structure D comprising an aryl group substituted with a substituted oxy group; and a nonlinear optical element comprising said chromophore.


Patent
National Institute Of Information And Communications Technology | Date: 2016-05-04

[Object] To provide a question-answering system capable of appropriately answering to a non-factoid question. [Solution] A question-answering system 30 includes: a related document searching unit 54 responsive to a question, for taking out answer candidates from an object document storage unit 32; an answer candidate extracting unit 56 extracting plausible ones from the answer candidates; a causal relation recognizing unit 60 recognizing causal relation expression included in extracted answer candidates; causal relation relevancy determining unit 64 determining whether or not a recognized causal relation is relevant as an answer; a feature vector generating unit 66 generating a feature vector related to a combination of the question and the searched answer candidate using the results of processing up to the causal relation relevancy determining unit 64; and a feature vector generating unit 66 for calculating, when a feature vector is given, a score indicating a degree of how correct an answer candidate is as an answer to the question, for the question and the answer candidate as a source of the feature vector, and for outputting, as the answer to the question, an answer candidate having the highest score.


Patent
National Institute Of Information And Communications Technology | Date: 2016-04-27

[Object] To provide a system for automatically and reliably collecting information belonging to a given category, and matching the information appropriately in a timely manner. [Solution] A text classifying device 30 analyzes dependency of collected texts by a morpheme analyzing unit 52 and a dependency analyzing unit 54. A problem report collecting unit 64 specifies a core consisting of noun + predicate in a text based on dependency relation of the text, and using a combination of noun classification (trouble/non-trouble) and predicate classification (excitatory/inhibitory), classifies the text to a problem report or the rest, by a method referred to as core-based matrix. Support information collecting device 66 and request message collecting device 68 collect support information and request messages in the similar manner. A matching device 76 matches problem reports and support information collected by problem report collecting unit 64 and support information collecting device 66 by a method referred to as co-occurrence core matrix, and thus associates problem information (support information) with appropriate support information (problem information).


Patent
National Institute Of Information And Communications Technology | Date: 2016-02-26

On a surface of a screen, a first direction parallel to a virtual plane and a second direction orthogonal to the first direction are defined. A basic diffusion member of the screen diffuses and transmits each light ray at a first angle in a first plane parallel to the first direction, and diffuses and transmits the light ray at a second angle larger than the first angle in a second plane parallel to the second direction. An adjustment diffusion member of the screen diffuses and transmits each light ray at an adjustment angle larger than the first angle in the first plane. The basic diffusion member and the adjustment diffusion member are stacked on each other such that a diffusion angle of each light ray by the screen in the first plane is adjusted to a target angle larger than the adjustment angle.


Patent
National Institute Of Information And Communications Technology | Date: 2016-03-30

Provided is a DNN learning method that can reduce DNN learning time using data belonging to a plurality of categories. The method includes the steps of training a language-independent sub-network 120 and language-dependent sub-networks 122 and 124 with training data of Japanese and English. This step includes: a first step of training a DNN obtained by connecting neurons in an output layer of the sub-network 120 with neurons in an input layer of sub-network 122 with Japanese training data; a step of forming a DNN by connecting the sub-network 124 in place of the sub-network 122 to the sub-network 120 and training it with English data; repeating these steps alternately until all training data ends; and after completion, separating the first sub-network 120 from other sub-networks and storing it as a category-independent sub-network in a storage medium.


Patent
National Institute Of Information And Communications Technology | Date: 2016-03-30

[Object] To provide a network visualizing apparatus giving a user to have a clear perspective of network configuration and operation. [Solution] The visualizing apparatus for monitoring a network having logical configuration changeable by software interpreting a network control command includes a display device 98, a first drawing unit drawing a first image 92 representing cooperation between services provided on the network on the display device 98, and a second drawing unit drawing a second image 98 representing what connection between which node and which switch realizes the service cooperation on the network, on the display device. The first and second drawing units update drawings of a service cooperation execution monitoring window 92 and a network configuration monitoring window 98, respectively, in a synchronized manner. A log 94 representing result of interpretation of descriptions describing cooperation between services and a log 96 representing network status may also be displayed in a synchronized manner.


Patent
National Institute Of Information And Communications Technology | Date: 2016-10-12

In order to solve a conventional problem that an accurate translation cannot be realized, a learning apparatus includes: a parser unit that parses a target language sentence contained in one or more pairs of original and translated sentences, thereby acquiring a binary tree of the target language sentence having one or more target language partial structures; a source language element acquiring unit that acquires one or more source language elements; a source language partial structure acquiring unit that acquires one or more source language partial structures each containing a parent node having a phrase label and two child nodes each having a phrase label or a source language element, using a structure indicated by the one or more target language partial structures contained in the binary tree of the target language sentence; a labeling unit that provides a reordering label to the one or more source language partial structures; a model building unit that builds one or more parsing models each having appearance probability information regarding a labeled source language partial structure, using one or more labeled source language partial structures; and an accumulating unit that accumulates a binary tree of a source language sentence having the one or more parsing models. Accordingly, it is possible to learn a model that can realize an accurate translation.


Patent
National Institute Of Information And Communications Technology | Date: 2016-09-21

A spatial light modulator is constituted by a plurality of pixels. A rearrangement optical element guides the light generated by the plurality of pixels of the spatial light modulator onto the screen to rearrange a plurality of pixels on a screen. Each lens of a lens array emits the light generated by the plurality of pixels rearranged on the screen as light beams in respective different directions. A control device controls the spatial light modulator such that a three-dimensional image is presented by the plurality of light beams emitted by a plurality of lenses of the lens array.

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