公开(公告)号：US20240331995A1

公开(公告)日：2024-10-03

申请号：US18400531

申请日：2023-12-29

Applicant: SHIMADZU CORPORATION

Inventor： Manabu UEDA ,  Shin FUJITA ,  Junichi TANIGUCHI ,  Shinjiro FUJITA ,  Shiro MIZUTANI

IPC: H01J49/42 ,  H01J49/02

CPC classification number: H01J49/4215 ,  H01J49/022

Abstract: A quadrupole mass filter (50) has a main-rod section (500) including rod electrodes arranged around a central axis C and a first pre-rod section (501) including pre-rod electrodes. Along with an RF voltage having a frequency corresponding to the m/z of an ion, DC voltage is applied to the pre-rod electrodes. The DC voltage and the amplitude of the RF voltage are determined so that a-value and q-value substantially satisfy the conditions that a≠0, (π−βx·π)N={(½)+m}π and βy·π·N={(½)+n}π, where m, n and N are natural numbers, with the X-axis direction connecting the centers of two rod electrodes facing each other across the central axis in a plane perpendicular to the central axis, the Y-axis direction connecting the centers of the other two rod electrodes in the plane, and βx and βy representing β values (0

公开(公告)号：US20210293763A1

公开(公告)日：2021-09-23

申请号：US17167503

申请日：2021-02-04

Applicant: Shimadzu Corporation

Inventor： Shin FUJITA

IPC: G01N30/86 ,  G01N30/72

Abstract: A peak analyzing method for separating overlapping peaks observed in a second signal waveform representing a relationship between a second parameter and a signal intensity into a plurality of individual peaks originating from different factors based on signal patterns observed in a dimension of a first parameter, the method including at least: performing singular value decomposition on an input matrix expressing three-dimensional data to be processed; estimating characteristic orientations within a space spanned by a plurality of basis vectors by performing a geometric analysis on a trajectory defined by a plurality of weighting vectors in an SVD projection space whose number of dimensions is equal to a lowered rank given by a singular value decomposition process; and deconvoluting signal waveforms in a first matrix of a dimension of the first parameter by a transformation matrix.

公开(公告)号：US20200065699A1

公开(公告)日：2020-02-27

申请号：US16462611

申请日：2017-01-19

Applicant: SHIMADZU CORPORATION

Inventor： Yusuke TAMAI ,  Shigeki KAJIHARA ,  Shin FUJITA ,  Ryota AISU

IPC: G06N20/00

Abstract: This analytical data analysis method uses machine learning of analysis result data (31) measured by an analyzer (1), and includes generating simulated data (32) in which a data variation has been added to the analysis result data (31) within a range that does not affect identification, performing the machine learning using the generated simulated data (32), and performing discrimination using a discrimination criterion (23b) obtained through the machine learning.