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243 条记录 (耗时 0.015 秒)

    Cracking property determination
    77.
    发明公开
    Cracking property determination 失效
    Feststellung von Krackeigenschaften

    公开(公告)号：EP0706049A1

    公开(公告)日：1996-04-10

    申请号：EP94430011.0

    申请日：1994-10-07

    申请人： BP CHEMICALS S.N.C. ,  NAPHTACHIMIE S.A.

    发明人： Descales, Bernard ,  Martens, André ,  Granzotto, Claude ,  Lambert, Didier ,  Llinas, Jean-Richard

    IPC分类号： G01N33/28 ,  G01N21/35

    CPC分类号： G01N33/2829 ,  C10G9/00 ,  G01N21/35 ,  G01N21/359 ,  Y10T436/115831 ,  Y10T436/117497 ,  Y10T436/12 ,  Y10T436/21 ,  Y10T436/212 ,  Y10T436/214 ,  Y10T436/216 ,  Y10T436/218

    摘要： A method of determining or predicting a value P x of a property of a feed X to a steam cracking process or yield of said process, which method comprises measuring the absorption D ix of said material at more than one wavelength in the region 600-2600 nm, comparing the said absorptions or a derivative thereof with absorptions D im or derivatives thereof at the same wavelength for a number of standards S in a bank for which the said property or yield P is known, and choosing from the bank at least one standard S m with property P m said standard having the smallest average value of the absolute difference at each wavelength i between the absorption D i x (or derivative thereof) for the material and the absorption D i m (or derivative thereof) for the standard S m to obtain P x , with averaging of said properties or yields P m when more than one standard S m is chosen.

    摘要翻译： 一种确定或预测进料X的性质的值Px至蒸汽裂解过程或所述方法的产率的方法，该方法包括在600-2600nm的区域中测量多于一个波长的所述材料的吸收Dix， 将所述吸收或其衍生物与所述性质或产率P已知的银行中的多个标准S的相同波长的吸收Dim或其衍生物进行比较，并且从所述银行中选择至少一种具有特性的标准Sm Pm表示在材料的吸收Dix（或其衍生物）和用于标准Sm的吸收Dim（或其衍生物）之间的每个波长i处的绝对差的最小平均值的标准，以获得Px，平均所述性质 或者当选择多于一个标准Sm时产生Pm。

    METHOD FOR PREDICTION OF PHYSICAL PROPERTY DATA OF HYDROCARBON PRODUCTS
    78.
    发明公开
    METHOD FOR PREDICTION OF PHYSICAL PROPERTY DATA OF HYDROCARBON PRODUCTS 失效
    方法有关物理特征相关的数据的烃类产品父亲说过。

    公开(公告)号：EP0681693A1

    公开(公告)日：1995-11-15

    申请号：EP94905722.0

    申请日：1994-01-26

    申请人： SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

    发明人： TOLCHARD, John Michael ,  BOYD, Andrew

    IPC分类号： G01N21 ,  G01N33

    CPC分类号： G01N21/359 ,  G01N21/3577 ,  G01N33/2829 ,  G01N33/2852

    摘要： A method for data processing and optimisation of a neural network for application in the determination of physical property data of hydrocarbon products from measured (N.)I.R. spectral absorbances, characterized by the steps of: a) measuring the (N.)I.R. spectra of a large set of hydrocarbon product samples from a wide range of sources; b) selecting an overtone (harmonic) region of the (near-)infrared spectra, thus obtained; c) selecting a number of discrete wavelengths in each (N.)I.R. spectrum, converting a number of the said wavelengths to absorption data and using said absorption data as an input to a neural network; d) training the neural network on the entire data set by repeated presentation of inputs and known outputs i.e. the near-infrared data for the hydrocarbon product and its relevant physical property data, to learn the relationship between the two, and monitoring the performance of its predicitions against the actual physical property data as measured by standard methods for the training data, thus correlating the absorbance values with said relevant physical property; e) generating a set of values of the interconnection weights and biases of the network as adjusted after the learning period of step d); and f) applying these adjusted values, utilizing the network algorithm to (near-)infrared spectra, taken under the same conditions, for hydrocarbon products of unknown physical property data.

    Sensor zur Messung des Mischungsverhältnisses von Flüssigkeiten
    79.
    发明授权
    Sensor zur Messung des Mischungsverhältnisses von Flüssigkeiten 失效
    传感器，用于测量液体的混合比。

    公开(公告)号：EP0555236B1

    公开(公告)日：1995-09-13

    申请号：EP91917353.4

    申请日：1991-10-10

    申请人： ROBERT BOSCH GMBH

    发明人： SEIPLER, Dieter ,  ZIEGENBEIN, Botho ,  MAIHOEFER, Bernd

    IPC分类号： G01N27/22 ,  G01N33/28 ,  G01N27/07

    CPC分类号： G01N33/2829 ,  G01N27/221 ,  G01N27/226

    摘要： The proposal is for a sensor for measuring the mixing ratio of fluids, especially fuel mixtures. The sensor has a measuring cell with a hollow space having an in and outflow. The fluid is led trhough the hollow space, whereby regions of the wall of the hollow space are electrically conductive and with at least one further electrically conductive surface form a capacitor which is a component of an evaluation circuit. The measuring cell consists of at least two ceramic bearers which are combined into a layer arrengement via at least one connecting layer. The hollow space is produced by the local lack of at least one connecting layer. In the region of the hollow space there is at least one thick-film electrode on the ceramic bearers limiting the hollow space.

    PROCESS AND APPARATUS FOR ANALYSIS OF HYDROCARBONS BY NEAR-INFRARED SPECTROSCOPY
    80.
    发明授权
    PROCESS AND APPARATUS FOR ANALYSIS OF HYDROCARBONS BY NEAR-INFRARED SPECTROSCOPY 失效
    装置和方法用于烃的在近红外区中的分析通过光谱。

    公开(公告)号：EP0555216B1

    公开(公告)日：1995-02-15

    申请号：EP91906149.9

    申请日：1991-03-05

    申请人： ASHLAND OIL, INC.

    发明人： MAGGARD, Steven, M.

    IPC分类号： G01N33/28

    CPC分类号： G01N21/359 ,  G01N21/3577 ,  G01N33/2829 ,  G01N2201/129

    摘要： Certain selected wavelengths in the near infrared spectra permit analysis of weight percent, volume percent, or even mole percent of each component, e.g. PIANO (paraffin, isoparaffin, aromatic, naphtenes, and olefins), octane (preferably research, motor or pump), and percent of various hydrocarbons, e.g. alpha olefins. Analysis can be nearly continuous anlysis on-line or at-line, as well as batch analysis, e.g. in a quality control laboratory. Preferably the NIR data is converted to a second derivative of the spectra and multiple linear regression performed to model the individual PIANO concentrations, and to predict physical properties of fuel blending components, e.g. research octane of reformate, etc.