Verfügbarkeit: Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications

Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications:

Gespeichert in:

Bibliographische Detailangaben
Beteiligte Personen:	Zhong, Maiying (VerfasserIn), Xue, Ting (VerfasserIn), Ding, Steven X. (VerfasserIn), Zhou, Donghua (VerfasserIn)
Format:	Elektronisch E-Book
Sprache:	Englisch
Veröffentlicht:	Singapore Springer Nature Singapore 2023 Singapore Springer
Ausgabe:	1st ed. 2023
Schlagwörter:	Control and Systems Theory Mathematical and Computational Engineering Applications Systems Theory, Control Control engineering Engineering mathematics Engineering—Data processing System theory Control theory
Links:	https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2 https://doi.org/10.1007/978-981-19-5438-2
Umfang:	1 Online-Ressource (XIX, 406 p. 103 illus., 94 illus. in color)
ISBN:	9789811954382
DOI:	10.1007/978-981-19-5438-2

Internformat

MARC


LEADER	00000nam a2200000zc 4500
001	BV048638691
003	DE-604
005	00000000000000.0
007	cr\|uuu---uuuuu
008	230110s2023 xx o\|\|\|\| 00\|\|\| eng d
020			\|a 9789811954382 \|c Online \|9 978-981-1954-38-2
024	7		\|a 10.1007/978-981-19-5438-2 \|2 doi
035			\|a (ZDB-2-INR)9789811954382
035			\|a (OCoLC)1357528614
035			\|a (DE-599)BVBBV048638691
040			\|a DE-604 \|b ger \|e rda
041	0		\|a eng
049			\|a DE-91 \|a DE-1028 \|a DE-1046 \|a DE-Aug4 \|a DE-898 \|a DE-523 \|a DE-859 \|a DE-29 \|a DE-863 \|a DE-1050 \|a DE-862 \|a DE-92 \|a DE-522 \|a DE-573 \|a DE-M347 \|a DE-706 \|a DE-739 \|a DE-634
082	0		\|a 003 \|2 23
082	0		\|a 629.8312 \|2 23
084			\|a DAT 000 \|2 stub
100	1		\|a Zhong, Maiying \|e Verfasser \|4 aut
245	1	0	\|a Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications \|c by Maiying Zhong, Ting Xue, Steven X. Ding, Donghua Zhou
250			\|a 1st ed. 2023
264		1	\|a Singapore \|b Springer Nature Singapore \|c 2023
264		1	\|a Singapore \|b Springer
300			\|a 1 Online-Ressource (XIX, 406 p. 103 illus., 94 illus. in color)
336			\|b txt \|2 rdacontent
337			\|b c \|2 rdamedia
338			\|b cr \|2 rdacarrier
650		4	\|a Control and Systems Theory
650		4	\|a Mathematical and Computational Engineering Applications
650		4	\|a Systems Theory, Control
650		4	\|a Control engineering
650		4	\|a Engineering mathematics
650		4	\|a Engineering—Data processing
650		4	\|a System theory
650		4	\|a Control theory
700	1		\|a Xue, Ting \|4 aut
700	1		\|a Ding, Steven X. \|4 aut
700	1		\|a Zhou, Donghua \|4 aut
776	0	8	\|i Erscheint auch als \|n Druck-Ausgabe \|z 978-981-1954-37-5
776	0	8	\|i Erscheint auch als \|n Druck-Ausgabe \|z 978-981-1954-39-9
776	0	8	\|i Erscheint auch als \|n Druck-Ausgabe \|z 978-981-1954-40-5
856	4	0	\|u https://doi.org/10.1007/978-981-19-5438-2 \|x Verlag \|z URL des Erstveröffentlichers \|3 Volltext
912			\|a ZDB-2-INR
940	1		\|q ZDB-2-INR_2023
943	1		\|a oai:aleph.bib-bvb.de:BVB01-034013657
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-522 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-634 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-1046 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-1028 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-Aug4 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-1050 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-573 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-M347 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-92 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-898 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-859 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-863 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-862 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-523 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-91 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-706 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-29 \|p ZDB-2-INR \|x Verlag \|3 Volltext
966	e		\|u https://doi.org/10.1007/978-981-19-5438-2 \|l DE-739 \|p ZDB-2-INR \|x Verlag \|3 Volltext

Datensatz im Suchindex

DE-BY-TUM_katkey	2709089
_version_	1821936542917066752
any_adam_object
author	Zhong, Maiying Xue, Ting Ding, Steven X. Zhou, Donghua
author_facet	Zhong, Maiying Xue, Ting Ding, Steven X. Zhou, Donghua
author_role	aut aut aut aut
author_sort	Zhong, Maiying
author_variant	m z mz t x tx s x d sx sxd d z dz
building	Verbundindex
bvnumber	BV048638691
classification_tum	DAT 000
collection	ZDB-2-INR
ctrlnum	(ZDB-2-INR)9789811954382 (OCoLC)1357528614 (DE-599)BVBBV048638691
dewey-full	003 629.8312
dewey-hundreds	000 - Computer science, information, general works 600 - Technology (Applied sciences)
dewey-ones	003 - Systems 629 - Other branches of engineering
dewey-raw	003 629.8312
dewey-search	003 629.8312
dewey-sort	13
dewey-tens	000 - Computer science, information, general works 620 - Engineering and allied operations
discipline	Informatik Mess-/Steuerungs-/Regelungs-/Automatisierungstechnik / Mechatronik
doi_str_mv	10.1007/978-981-19-5438-2
edition	1st ed. 2023
format	Electronic eBook
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>03764nam a2200757zc 4500</leader><controlfield tag="001">BV048638691</controlfield><controlfield tag="003">DE-604</controlfield><controlfield tag="005">00000000000000.0</controlfield><controlfield tag="007">cr\|uuu---uuuuu</controlfield><controlfield tag="008">230110s2023 xx o\|\|\|\| 00\|\|\| eng d</controlfield><datafield tag="020" ind1=" " ind2=" "><subfield code="a">9789811954382</subfield><subfield code="c">Online</subfield><subfield code="9">978-981-1954-38-2</subfield></datafield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/978-981-19-5438-2</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(ZDB-2-INR)9789811954382</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)1357528614</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)BVBBV048638691</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-604</subfield><subfield code="b">ger</subfield><subfield code="e">rda</subfield></datafield><datafield tag="041" ind1="0" ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="049" ind1=" " ind2=" "><subfield code="a">DE-91</subfield><subfield code="a">DE-1028</subfield><subfield code="a">DE-1046</subfield><subfield code="a">DE-Aug4</subfield><subfield code="a">DE-898</subfield><subfield code="a">DE-523</subfield><subfield code="a">DE-859</subfield><subfield code="a">DE-29</subfield><subfield code="a">DE-863</subfield><subfield code="a">DE-1050</subfield><subfield code="a">DE-862</subfield><subfield code="a">DE-92</subfield><subfield code="a">DE-522</subfield><subfield code="a">DE-573</subfield><subfield code="a">DE-M347</subfield><subfield code="a">DE-706</subfield><subfield code="a">DE-739</subfield><subfield code="a">DE-634</subfield></datafield><datafield tag="082" ind1="0" ind2=" "><subfield code="a">003</subfield><subfield code="2">23</subfield></datafield><datafield tag="082" ind1="0" ind2=" "><subfield code="a">629.8312</subfield><subfield code="2">23</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">DAT 000</subfield><subfield code="2">stub</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Zhong, Maiying</subfield><subfield code="e">Verfasser</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications</subfield><subfield code="c">by Maiying Zhong, Ting Xue, Steven X. Ding, Donghua Zhou</subfield></datafield><datafield tag="250" ind1=" " ind2=" "><subfield code="a">1st ed. 2023</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Singapore</subfield><subfield code="b">Springer Nature Singapore</subfield><subfield code="c">2023</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Singapore</subfield><subfield code="b">Springer</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">1 Online-Ressource (XIX, 406 p. 103 illus., 94 illus. in color)</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Control and Systems Theory</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Mathematical and Computational Engineering Applications</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Systems Theory, Control</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Control engineering</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Engineering mathematics</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Engineering—Data processing</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">System theory</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Control theory</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Xue, Ting</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Ding, Steven X.</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Zhou, Donghua</subfield><subfield code="4">aut</subfield></datafield><datafield tag="776" ind1="0" ind2="8"><subfield code="i">Erscheint auch als</subfield><subfield code="n">Druck-Ausgabe</subfield><subfield code="z">978-981-1954-37-5</subfield></datafield><datafield tag="776" ind1="0" ind2="8"><subfield code="i">Erscheint auch als</subfield><subfield code="n">Druck-Ausgabe</subfield><subfield code="z">978-981-1954-39-9</subfield></datafield><datafield tag="776" ind1="0" ind2="8"><subfield code="i">Erscheint auch als</subfield><subfield code="n">Druck-Ausgabe</subfield><subfield code="z">978-981-1954-40-5</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="x">Verlag</subfield><subfield code="z">URL des Erstveröffentlichers</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-2-INR</subfield></datafield><datafield tag="940" ind1="1" ind2=" "><subfield code="q">ZDB-2-INR_2023</subfield></datafield><datafield tag="943" ind1="1" ind2=" "><subfield code="a">oai:aleph.bib-bvb.de:BVB01-034013657</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-522</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-634</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-1046</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-1028</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-Aug4</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-1050</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-573</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-M347</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-92</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-898</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-859</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-863</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-862</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-523</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-91</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-706</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-29</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/978-981-19-5438-2</subfield><subfield code="l">DE-739</subfield><subfield code="p">ZDB-2-INR</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield></record></collection>
id	DE-604.BV048638691
illustrated	Not Illustrated
indexdate	2024-12-20T19:50:56Z
institution	BVB
isbn	9789811954382
language	English
oai_aleph_id	oai:aleph.bib-bvb.de:BVB01-034013657
oclc_num	1357528614
open_access_boolean
owner	DE-91 DE-BY-TUM DE-1028 DE-1046 DE-Aug4 DE-898 DE-BY-UBR DE-523 DE-859 DE-29 DE-863 DE-BY-FWS DE-1050 DE-862 DE-BY-FWS DE-92 DE-522 DE-573 DE-M347 DE-706 DE-739 DE-634
owner_facet	DE-91 DE-BY-TUM DE-1028 DE-1046 DE-Aug4 DE-898 DE-BY-UBR DE-523 DE-859 DE-29 DE-863 DE-BY-FWS DE-1050 DE-862 DE-BY-FWS DE-92 DE-522 DE-573 DE-M347 DE-706 DE-739 DE-634
physical	1 Online-Ressource (XIX, 406 p. 103 illus., 94 illus. in color)
psigel	ZDB-2-INR ZDB-2-INR_2023
publishDate	2023
publishDateSearch	2023
publishDateSort	2023
publisher	Springer Nature Singapore Springer
record_format	marc
spellingShingle	Zhong, Maiying Xue, Ting Ding, Steven X. Zhou, Donghua Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications Control and Systems Theory Mathematical and Computational Engineering Applications Systems Theory, Control Control engineering Engineering mathematics Engineering—Data processing System theory Control theory
title	Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications
title_auth	Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications
title_exact_search	Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications
title_full	Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications by Maiying Zhong, Ting Xue, Steven X. Ding, Donghua Zhou
title_fullStr	Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications by Maiying Zhong, Ting Xue, Steven X. Ding, Donghua Zhou
title_full_unstemmed	Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications by Maiying Zhong, Ting Xue, Steven X. Ding, Donghua Zhou
title_short	Fault Diagnosis for Linear Discrete Time-Varying Systems and Its Applications
title_sort	fault diagnosis for linear discrete time varying systems and its applications
topic	Control and Systems Theory Mathematical and Computational Engineering Applications Systems Theory, Control Control engineering Engineering mathematics Engineering—Data processing System theory Control theory
topic_facet	Control and Systems Theory Mathematical and Computational Engineering Applications Systems Theory, Control Control engineering Engineering mathematics Engineering—Data processing System theory Control theory
url	https://doi.org/10.1007/978-981-19-5438-2
work_keys_str_mv	AT zhongmaiying faultdiagnosisforlineardiscretetimevaryingsystemsanditsapplications AT xueting faultdiagnosisforlineardiscretetimevaryingsystemsanditsapplications AT dingstevenx faultdiagnosisforlineardiscretetimevaryingsystemsanditsapplications AT zhoudonghua faultdiagnosisforlineardiscretetimevaryingsystemsanditsapplications

Verfügbarkeit

Bestellen (Login erforderlich)

Online lesen