PatentNet: multi-label classification of patent documents using deep learning based language understanding

Scientometrics - Patent classification is an expensive and time-consuming task that has conventionally been performed by domain experts. However, the increase in the number of filed patents and the...     

Emotion classification by removal of the overlap from incremental association language features

With the increased incidence of depressive disorders, many psychiatric websites have developed community-based services such as message boards, web forums and blogs for public access. Using machine learning approaches, we can identify user's emotions from such forum and blog posts to recognize the variance in depressive disorders automatically. The incremental association language feature is applied in this research to discover words with high information content in sentences. In past research, the overlap-category in building a feature has not been considered. Hence, this work makes a pioneering attempt to develop a model for emotion classification with overlap-category consideration. This research applies association rule mining to discover words appearing with high frequency in a sentence and to avoid a feature-overlap in categories simultaneously. The approach is named Association Language Features by Category (ALFC). The experimental results show that ALFC features have ability to distinguish between the various categories. The result has been compared with the approach of baseline and mutual information which use single words and correlation measures respectively.     

Multispectral synthesis of daylight using a commercial digital CCD camera

Performance of multispectral devices in recovering spectral data has been intensively investigated in some applications, as in spectral characterization of art paintings, but has received little attention in the context of spectral characterization of natural illumination. This study investigated the quality of the spectral estimation of daylight-type illuminants using a commercial digital CCD camera and a set of broadband colored filters. Several recovery algorithms that did not need information about spectral sensitivities of the camera sensors nor eigenvectors to describe the spectra were tested. Tests were carried out both with virtual data, using simulated camera responses, and real data obtained from real measurements. It was found that it is possible to recover daylight spectra with high spectral and colorimetric accuracy with a reduced number of three to nine spectral bands.     

Study of a pose-relay videometric method using a parallel camera series

This study proposes a pose-relay videometric method that uses a parallel camera series and is applicable to measuring deformation between nonintervisible and intervisible objects with a very wide angle of view. The measuring system is constructed by adding symmetrical cameras to the pose-relay stations of a single camera measuring system to improve its robustness and precision. An adjustment data fusion method is suggested to take full advantage of the data redundancy among neighboring relay stations in the proposed system. Simulated results show that the adjusted method enhances the measuring precision achieved with the classic weighted average data fusion method owing to its use of the restraint condition inherent in the system.     

On determination of sign of the piezo-optic coefficients using torsion method

We have shown that a high-accuracy torsion method recently developed by the authors for measuring piezo-optic coefficients allows determining not only the absolute value of the coefficients but also their sign. The techniques and experimental procedures used for determination of the sign are described in detail and proven based on studies of α-BaB2O4 and LiNbO3 crystals. The piezo-optic coefficients are determined for both crystals, and a combination of the corresponding photoelastic coefficients is determined for the case of α-BaB2O4 crystals.     

Improvement of classification using robust soft classification rules for near-infrared reflectance spectral data

The aim of this work was to propose a quick and cost-effective procedure, which could help to identify the types of fat (rapeseed, a mixture of rapeseed and soybean, and lard oils) added to feed used for raising pigs. For this purpose, liver samples were examined and their near-infrared reflectance spectra served as data for the construction of classic and robust soft independent modeling of class analogy (SIMCA) models. The results showed that the near-infrared reflectance spectra contained information sufficient to build good classification models that enabled three types of fat additions to be distinguished. The best classification results were obtained from robust SIMCA, indicating its superior performance in terms of high sensitivity and specificity in comparison with classic SIMCA. Specifically, robust models had sensitivities of 100% and specificities of 96.05%, 97.73% and 100%, for rapeseed, mixture of rapeseed and soybean, and lard enriched feed, respectively.     

Three-dimensional temperature measurement of combustion flames using a single monochromatic CCD camera

This paper presents an imaging-based instrumentation system for three-dimensional (3-D) temperature measurement of a combustion flame. A combination of image-processing techniques and two-color radiation thermometry is used to first reconstruct band-limited grayscale representations of the flame and then to determine its temperature distribution. The reconstruction process assumes rotational symmetry in the structure of the flame. A series of experiments has been conducted on a laboratory-scale combustion rig to evaluate the performance of the system. The results obtained demonstrate the capability of the system to determine flame temperature on a 3-D basis.     

Synthesis of unlimited speech in Indian languages using formant-based rules

Synthesis of continuous and unlimited speech is a matter of theoretical as well as technological interest. Independent efforts are needed for synthesis in Indian languages which are substantially different from English and other European languages. The paper discusses basic synthesis issues like text-to-phoneme and phoneme-to-speech conversion and incorporation of prosody. The three commonly adopted methodologies of concatenation, formant and articulatory syntheses are compared. The TIFR phoneme-to-speech synthesizer which utilizes a standard formant synthesizer as a speech production model is described and the methodology for evolving and organizing formant-based rules to drive the used synthesizer is emphasized. The results of some perception tests are reported and a few potential applications are suggested. The direction of the future work for enhancing the quality and expanding the scope of the synthesizer is indicated. Deceased     

Synthesis and characterization of functional gradient materials using Indian corals

The partial conversion of coralline hydroxyapatite (HA) into tricalcium phosphate (TCP) catalyzed by the thermal decomposition of silver oxide was investigated. The thermal analysis of HA powder mixed with 5 mol % Ag₂O indicated the decomposition of silver oxide to be around 550°C in the presence of HA. Subsequently a functional gradient structure was formed by spreading silver oxide on one surface of the HA compact of diameter 10 mm and then firing at 700°C in air. The X-ray powder diffraction analysis confirmed the formation of -TCP induced by the Ag₂O decomposition. The content of -TCP of the sintered pellet was found to decrease with the increasing depth from the surface of the pellet. In vitro solubility study in phosphate buffer of pH 7.2 showed the stability of the biphasic material as in between HA and TCP. © 2000 Kluwer Academic Publishers     

利用数码相机和CorelDRAW软件测量任意曲线长度和物体柱面的表面积

仿真饰品及小部件的表面通常为不规则的异形曲面,手工测量困难,估算结果误差较大。样品表面积的准确计算是困扰检验人员的重要问题之一,该文利用数码相机、CorelDRAW软件等常见辅助工具,根据所建立的数码相机成像中目标图像、参考图像的尺寸放大倍率与两者物距的关系公式,结合CorelDRAW软件的描线及交互式调和工具,建立利用数码相机和CorelDRAW软件测量任意曲线长度及物体柱面表面积的方法;提出成像物距与长度测量结果的关系,解决常见利用数码相机和计算机软件测量物体面积方法中不规则曲线长度及柱面面积测量问题,进一步扩展了该测量法的适用范围。同时提出通过理论计算和数学拟合两种方式测量的方法,以满足不同的测量需求。     

First demonstration of neutron resonance absorption imaging using a high-speed video camera in J-PARC

The neutron resonance absorption imaging technique with a high-speed video camera was successfully demonstrated at the beam line NOBORU, J-PARC. Pulsed neutrons were observed through several kinds of metal foils as a function of neutron time-of-flight by utilizing a high-speed neutron radiography system. A set of time-dependent images was obtained for each neutron pulse, and more than a thousand sets of images were recorded in total. The images with the same time frame were summed after the measurement. Then the authors obtained a set of images having enhanced contrast of sample foils around the resonance absorption energies of cobalt (132 eV), cadmium (28 eV), tantalum (4.3 and 10 eV), gold (4.9 eV) and indium (1.5 eV).     

Observation of3He crystallization down to 1 mK using a cooled CCD camera

We describe a new setup for optical observations (particularly of helium crystals) at ultralow temperatures. It is conceptually different from the usual optical setups, which require the use of optical windows in the cryostat. Our optical system, including the light source and camera, is placed inside the vacuum can of a dilution refrigerator cryostat. We have succeeded in filming the growth of³He crystals in contact with the superfluid B phase, down to 1 mK. The optical system can easily be combined with a nuclear demagnetization stage, and a simple extension of the image transport system will allow us to study³He crystals in high magnetic fields. The entire setup is described, and some typical images are shown.     

Filtering and processing of panoramic images obtained using a camera and a wide-angle-imaging reflective surface

There is an increasing interest in wide-angle imaging of the environment using curved reflective surfaces. With this comes the need for appropriate filtering and processing of the acquired images. Here we present a technique for homogeneous, fast filtering of panoramic images captured using a camera and a wide-angle-imaging reflective surface. Imaging of the panoramic environment onto a two-dimensional (2-D) plane necessarily introduces spatial distortions such as stretching and bending that vary with the viewing direction. Therefore, if the panoramic image is to be filtered homogeneously in all viewing directions, it is necessary to match the filtering to the distortions. We show how this can be accomplished. The image acquired by the camera is first digitally unwarped and represented in Cartesian coordinates representing azimuth and elevation. The mappings of patches of uniform size and shape on the viewsphere are then established. Next, for each filter patch the local mappings of great circles along two principal axes (along the local longitudinal and elevational directions) on the image plane are determined. The mappings of these great circles are used to perform the 2-D convolution required by the filtering operation. Convolution along the directions of local, mutually orthogonal great circles permits the filtering to be carried out in a quasi-separable fashion, resulting in increased computational speed and efficiency. Examples of homogeneous filtering using this procedure are presented.     

利用数码相机和Photoshop软件测量物体任意边界平面的面积

通过对照相机成像的几何光学理论分析,结合数字图像的显像原理,建立利用数码相机和Photoshop软件测量物体任意边界平面面积的方法;提出成像物距与面积测量结果的关系,解决常见利用数码相机和Photoshop软件测量面积方法中目标与背景不在同一平面时面积测量不准的问题,扩大该法的应用范围。同时提出通过理论计算和数学拟合两种方式测量面积的方法,以满足不同的测量需求。     

驻波热声发动机板叠温度分布的红外观察

为了深入研究热声板叠中的能量流动和分布,采用红外热像仪对自行设计搭建的驻波热声发动机板叠进行了温度场观测,重点分析了起消振过程中板叠的轴向和径向温度分布变化.实验结果表明:在起振时,板叠轴向中部的无量纲温度会出现突然升高并随之保持平稳.通过分析不同板叠安装角度下的板叠温度分布,首次发现自然对流会使起振前板叠的径向温度分...     

Structural decomposition of technological domain using patent co-classification and classification hierarchy

Scientometrics - This paper proposes a new method for decomposing a technological domain (TD). Specifically, the method identifies sub-TDs at the different levels of technological hierarchy within...     

Chromogenic sensing of biogenic amines using a chameleon probe and the red-green-blue readout of digital camera images

We report on sensing spots containing an amine reactive chromogenic probe and a green fluorescent (amine insensitive) reference dye incorporated in a hydrogel matrix on a solid support. Such spots enable rapid and direct determination of primary amines and, especially, biogenic amines (BA). A distinct color change from blue to red occurs on dipping the test spots into a pH 9.0 sample containing primary amines. BAs can be determined in the concentration range from 0.01 to 10 mM within 15 min, enabling rapid, qualitative, and semiquantitative evaluation. In the “photographic” approach, the typically 4-7.5-fold increase in fluorescence intensity of the probe at 620 nm along with the constant green fluorescence at 515 nm of a reference dye are used for quantitation of BAs. The sensing spots are photoexcited with high-power 505 nm light-emitting diodes (LEDs) in a black box. A digital picture is acquired with a commercially available digital camera, and the color information is extracted via red-green-blue (RGB) readout. The ratio of the intensities of the red (signal) channel and the green (reference) channel yields pseudocolor pictures and calibration plots.