Notice of Retraction: Dragon 3D Sketchpad- A Solid Geometry Intelligent Educational Platform

Zheng Liu, GuanHai Liu, Zhu Zhu

DOI: 10.1109/paccs.2011.5990093
Published: 2011-07
Container: 2011 Third Pacific-Asia Conference on Circuits, Communications and System (PACCS)
Publisher: IEEE
Open access: unknown

Credibility signals

serious concern Score 29/100 under policy 1.0.0. This is a metadata assessment, not a judgment of the paper's conclusions.

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supportingDOI registered: A matching record was returned by Crossref. Source: Crossref; license: CC0 metadata
supportingDOI resolves: A matching record was returned by Crossref. Source: Crossref; license: CC0 metadata
not scoredDirectory of Open Access Journals: No matching DOAJ record was present in this response. No allow-list match; this is not evidence of low credibility. Source: DOAJ; license: CC0
not scoredMEDLINE indexed: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredOpenAlex core source: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredKnown publisher allow-list: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredROR affiliation: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
serious concernRetraction Watch retraction: 1 retraction notice matched this DOI. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch expression of concern: No expression of concern notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch correction: No correction notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch reinstatement: No reinstatement notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredOpen access status: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
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not scoredPublication version: A publication version was supplied but is not scored. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer
supportingMetadata completeness: All 6 scored descriptive metadata groups are present. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer

Cite this work

BibTeX

@article{allodium:10.1109/paccs.2011.5990093,
  title = {Notice of Retraction: Dragon 3D Sketchpad- A Solid Geometry Intelligent Educational Platform},
  author = {Zheng Liu and GuanHai Liu and Zhu Zhu},
  year = {2011},
  journal = {2011 Third Pacific-Asia Conference on Circuits, Communications and System (PACCS)},
  doi = {10.1109/paccs.2011.5990093},
  url = {https://doi.org/10.1109/paccs.2011.5990093}
}

RIS

TY  - JOUR
TI  - Notice of Retraction: Dragon 3D Sketchpad- A Solid Geometry Intelligent Educational Platform
AU  - Zheng Liu
AU  - GuanHai Liu
AU  - Zhu Zhu
PY  - 2011
JO  - 2011 Third Pacific-Asia Conference on Circuits, Communications and System (PACCS)
DO  - 10.1109/paccs.2011.5990093
UR  - https://doi.org/10.1109/paccs.2011.5990093
ER  -

APA

Liu, Z., Liu, G., & Zhu, Z. (2011). Notice of Retraction: Dragon 3D Sketchpad- A Solid Geometry Intelligent Educational Platform. 2011 Third Pacific-Asia Conference on Circuits, Communications and System (PACCS). https://doi.org/10.1109/paccs.2011.5990093

Source records

crossref · retrieved 2026-09-25T02:18:04.363Z