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  1. Article ; Online: Acoustic manipulation dynamics of levitated particle with screw-shaped reflecting surface.

    Qin, X P / Geng, D L / Xie, W J / Wei, B

    The Review of scientific instruments

    2022  Volume 93, Issue 6, Page(s) 64506

    Abstract: Existing single-axis acoustic levitation devices with an axisymmetric reflector can manipulate particles in a variety of ways. However, the mechanism by which particles are suspended in a single-axis acoustic levitator with a non-axisymmetric reflector ... ...

    Abstract Existing single-axis acoustic levitation devices with an axisymmetric reflector can manipulate particles in a variety of ways. However, the mechanism by which particles are suspended in a single-axis acoustic levitator with a non-axisymmetric reflector remains poorly understood. This work addresses this issue by proposing a novel single-axis ultrasonic levitator design that includes a flat plane emitter and a screw-plane reflector. The node positions of the standing wave formed in this levitator were predicted by calculating the Gor'kov potential according to a numerical model. The analysis results demonstrate that the nodes were distributed off-axis and their positions varied in a spiral manner when changing the distance between the emitter and reflector. Corresponding experiments based on the proposed design were also conducted, and the results indicated that the distance changes between the emitter and reflector could induce some spiral trajectories of a polyethylene-foam particle placed in the ultrasonic field. Moreover, the trajectory of the suspended particle was found to distribute along a conical surface centered on the central axis of this device. This work provides a new approach for ultrasonic particle manipulation by changing the geometry of the reflector.
    Language English
    Publishing date 2022-04-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/5.0093655
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  2. Book ; Online: Minimal Linear Codes Constructed from hierarchical posets with two levels

    Wu, X. / Lu, W. / Qin, X. P. / Cao, X. W.

    2023  

    Abstract: J. Y. Hyun, et al. (Des. Codes Cryptogr., vol. 88, pp. 2475-2492, 2020) constructed some optimal and minimal binary linear codes generated by one or two order ideals in hierarchical posets of two levels. At the end of their paper, they left an open ... ...

    Abstract J. Y. Hyun, et al. (Des. Codes Cryptogr., vol. 88, pp. 2475-2492, 2020) constructed some optimal and minimal binary linear codes generated by one or two order ideals in hierarchical posets of two levels. At the end of their paper, they left an open problem: it also should be interesting to investigate the cases of more than two orders in hierarchical posets with two levels or many levels. In this paper, we use the geometric method to determine the minimality of linear codes generated by any orders in hierarchical posets with two levels. We generalize their cases of one or two orders to any orders and determine the minimality of the linear codes completely.

    Comment: arXiv admin note: text overlap with arXiv:1911.11632, arXiv:1911.07648
    Keywords Computer Science - Information Theory
    Publishing date 2023-05-09
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Book ; Online: Minimal Linear Codes Constructed from partial spreads

    Lu, W. / Wu, X. / Cao, X. W. / Luo, G. J. / Qin, X. P.

    2023  

    Abstract: Partial spread is important in finite geometry and can be used to construct linear codes. From the results in (Designs, Codes and Cryptography 90:1-15, 2022) by Xia Li, Qin Yue and Deng Tang, we know that if the number of the elements in a partial spread ...

    Abstract Partial spread is important in finite geometry and can be used to construct linear codes. From the results in (Designs, Codes and Cryptography 90:1-15, 2022) by Xia Li, Qin Yue and Deng Tang, we know that if the number of the elements in a partial spread is ``big enough", then the corresponding linear code is minimal. They used the sufficient condition in (IEEE Trans. Inf. Theory 44(5): 2010-2017, 1998) to prove the minimality of such linear codes. In this paper, we use the geometric approach to study the minimality of linear codes constructed from partial spreads in all cases.
    Keywords Computer Science - Information Theory
    Publishing date 2023-05-09
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Circular RNA circ-SMAD7 promoted ovarian cancer cell proliferation and metastasis by suppressing KLF6.

    Zhao, Y / Qin, X-P / Lang, Y-P / Kou, D / Shao, Z-W

    European review for medical and pharmacological sciences

    2020  Volume 24, Issue 14, Page(s) 7563

    Abstract: Since this article has been suspected of research misconduct and the corresponding authors did not respond to our request to prove originality of data and figures, "Circular RNA circ-SMAD7 promoted ovarian cancer cell proliferation and metastasis by ... ...

    Abstract Since this article has been suspected of research misconduct and the corresponding authors did not respond to our request to prove originality of data and figures, "Circular RNA circ-SMAD7 promoted ovarian cancer cell proliferation and metastasis by suppressing KLF6, by Y. Zhao, X.-P. Qin, Y.-P. Lang, D. Kou, Z.-W. Shao, published in Eur Rev Med Pharmacol Sci 2019; 23 (13): 5603-5610-DOI: 10.26355/eurrev_201907_18294-PMID: 31298312" has been withdrawn. The Publisher apologizes for any inconvenience this may cause. https://www.europeanreview.org/article/18294.
    Language English
    Publishing date 2020-08-19
    Publishing country Italy
    Document type Journal Article ; Retraction of Publication
    ZDB-ID 605550-3
    ISSN 2284-0729 ; 1128-3602 ; 0392-291X
    ISSN (online) 2284-0729
    ISSN 1128-3602 ; 0392-291X
    DOI 10.26355/eurrev_202007_22221
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1887: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  5. Article ; Online: Circular RNA circ-SMAD7 promoted ovarian cancer cell proliferation and metastasis by suppressing KLF6.

    Zhao, Y / Qin, X-P / Lang, Y-P / Kou, D / Shao, Z-W

    publication RETRACTED

    European review for medical and pharmacological sciences

    2019  Volume 23, Issue 13, Page(s) 5603–5610

    Abstract: Objective: Recently, the roles of circular RNAs (circRNAs) in tumor progression have attracted much attention. Currently, circ-SMAD7 has been identified as an oncogene in cancers. The aim of this study was to investigate the function of circ-SMAD7 in ... ...

    Abstract Objective: Recently, the roles of circular RNAs (circRNAs) in tumor progression have attracted much attention. Currently, circ-SMAD7 has been identified as an oncogene in cancers. The aim of this study was to investigate the function of circ-SMAD7 in the progression of ovarian cancer.
    Patients and methods: Circ-SMAD7 expression in both ovarian cancer cells and tissue samples was detected by quantitative Real Time-Polymerase Chain reaction (qRT-PCR). Circ-SMAD7 shRNA was constructed and transfected into the ovarian cancer cells. To identify the function of circ-SMAD7 in ovarian cancer, cell proliferation assay, colony formation assay, transwell assay, and Matrigel assay were conducted, respectively. In addition, qRT-PCR and Western blot assays were performed to elucidate the underlying mechanism and, then, it was analyzed.
    Results: Circ-SMAD7 expression was remarkably higher in ovarian cancer tissue samples than in corresponding normal tissues. The proliferation of the ovarian cancer cells was significantly inhibited after circ-SMAD7 downregulation. Meanwhile, the migration and invasion of ovarian cancer cells were significantly inhibited after circ-SMAD7 downregulation in vitro. Both the mRNA and the protein expressions of the Krüppel-like factor 6 (KLF6) were remarkably promoted after circ-SMAD7 was knocked down in ovarian cancer cells. Furthermore, the KLF6 expression level was negatively correlated with circ-SMAD7 expression level in ovarian cancer samples.
    Conclusions: Our study suggests that circ-SMAD7 promotes the progression of ovarian cancer and enhances cell metastasis and proliferation via suppressing KLF6. In addition, circ-SMAD7 may be a novel therapeutic strategy in ovarian cancer.
    Language English
    Publishing date 2019-07-13
    Publishing country Italy
    Document type Journal Article ; Retracted Publication
    ZDB-ID 605550-3
    ISSN 2284-0729 ; 1128-3602 ; 0392-291X
    ISSN (online) 2284-0729
    ISSN 1128-3602 ; 0392-291X
    DOI 10.26355/eurrev_201907_18294
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1887: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: [Bcl-2 associated athanogene 3 affects the epithelial-mesenchymal transition in human cervical cancer].

    Wei, L / Qin, X P / Zhao, X X / Wang, W

    Zhonghua fu chan ke za zhi

    2017  Volume 52, Issue 8, Page(s) 551–557

    Abstract: Objective: ...

    Abstract Objective:
    MeSH term(s) Adaptor Proteins, Signal Transducing/genetics ; Animals ; Antigens, CD ; Apoptosis Regulatory Proteins/genetics ; Cadherins ; Cell Line, Tumor ; Cell Proliferation ; Epithelial-Mesenchymal Transition ; Female ; Gene Expression Regulation, Neoplastic ; HeLa Cells ; Humans ; Matrix Metalloproteinase 2 ; Mice ; Mice, Nude ; RNA, Messenger ; RNA, Small Interfering ; Transcription Factors ; Transfection ; Uterine Cervical Neoplasms/metabolism
    Chemical Substances Adaptor Proteins, Signal Transducing ; Antigens, CD ; Apoptosis Regulatory Proteins ; BAG3 protein, human ; CDH1 protein, human ; Cadherins ; RNA, Messenger ; RNA, Small Interfering ; Transcription Factors ; Matrix Metalloproteinase 2 (EC 3.4.24.24)
    Language Chinese
    Publishing date 2017-08-28
    Publishing country China
    Document type Journal Article
    ZDB-ID 604570-4
    ISSN 0529-567X
    ISSN 0529-567X
    DOI 10.3760/cma.j.issn.0529-567X.2017.08.009
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    Zs.A 1619: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)
    Zs.MO 324: Show issues

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  7. Article ; Online: Depinning phase transition in the two-dimensional clock model with quenched randomness.

    Qin, X P / Zheng, B / Zhou, N J

    Physical review. E, Statistical, nonlinear, and soft matter physics

    2012  Volume 86, Issue 3 Pt 1, Page(s) 31129

    Abstract: With Monte Carlo simulations, we systematically investigate the depinning phase transition in the two-dimensional driven random-field clock model. Based on the short-time dynamic approach, we determine the transition field and critical exponents. The ... ...

    Abstract With Monte Carlo simulations, we systematically investigate the depinning phase transition in the two-dimensional driven random-field clock model. Based on the short-time dynamic approach, we determine the transition field and critical exponents. The results show that the critical exponents vary with the form of the random-field distribution and the strength of the random fields, and the roughening dynamics of the domain interface belongs to the new subclass with ζ≠ζ(loc)≠ζ(s) and ζ(loc)≠1. More importantly, we find that the transition field and critical exponents change with the initial orientations of the magnetization of the two ordered domains.
    Language English
    Publishing date 2012-09
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1550-2376
    ISSN (online) 1550-2376
    DOI 10.1103/PhysRevE.86.031129
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  8. Book ; Online: Depinning phase transition in two-dimensional clock model with quenched randomness

    Qin, X. P. / Zheng, B. / Zhou, N. J.

    2012  

    Abstract: With Monte Carlo simulations, we systematically investigate the depinning phase transition in the two-dimensional driven random-field clock model. Based on the short-time dynamic approach, we determine the transition field and critical exponents. The ... ...

    Abstract With Monte Carlo simulations, we systematically investigate the depinning phase transition in the two-dimensional driven random-field clock model. Based on the short-time dynamic approach, we determine the transition field and critical exponents. The results show that the critical exponents vary with the form of the random-field distribution and the strength of the random fields, and the roughening dynamics of the domain interface belongs to the new subclass with $\zeta \neq \zeta_{loc} \neq \zeta_s$ and $\zeta_{loc} \neq 1$. More importantly, we find that the transition field and critical exponents change with the initial orientations of the magnetization of the two ordered domains.

    Comment: 23 pages, 14 figures, 4 tables. arXiv admin note: text overlap with arXiv:1202.6486
    Keywords Condensed Matter - Disordered Systems and Neural Networks ; Condensed Matter - Statistical Mechanics ; Physics - Computational Physics
    Subject code 612
    Publishing date 2012-10-15
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Book ; Online: Universality class of the depinning transition in the two-dimensional Ising model with quenched disorder

    Qin, X. P. / Zheng, B. / Zhou, N. J.

    2012  

    Abstract: With Monte Carlo methods, we investigate the universality class of the depinning transition in the two-dimensional Ising model with quenched random fields. Based on the short-time dynamic approach, we accurately determine the depinning transition field ... ...

    Abstract With Monte Carlo methods, we investigate the universality class of the depinning transition in the two-dimensional Ising model with quenched random fields. Based on the short-time dynamic approach, we accurately determine the depinning transition field and both static and dynamic critical exponents. The critical exponents vary significantly with the form and strength of the random fields, but exhibit independence on the updating schemes of the Monte Carlo algorithm. From the roughness exponents $\zeta, \zeta_{loc}$ and $\zeta_s$, one may judge that the depinning transition of the random-field Ising model belongs to the new dynamic universality class with $\zeta \neq \zeta_{loc}\neq \zeta_s$ and $\zeta_{loc} \neq 1$. The crossover from the second-order phase transition to the first-order one is observed for the uniform distribution of the random fields, but it is not present for the Gaussian distribution.

    Comment: 16 pages, 16 figures, 3 tables
    Keywords Physics - Computational Physics ; Condensed Matter - Disordered Systems and Neural Networks ; Condensed Matter - Statistical Mechanics
    Subject code 612
    Publishing date 2012-02-29
    Publishing country us
    Document type Book ; Online
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  10. Article ; Online: Simultaneous analysis of small organic acids and humic acids using high performance size exclusion chromatography

    Qin, X.P. / Liu, F. / Wang, G.C. / Weng, L.P.

    Journal of Separation Science

    2012  Volume 35, Issue 24

    Abstract: An accurate and fast method for simultaneous determination of small organic acids and much larger humic acids was developed using high performance size exclusion chromatography. Two small organic acids, i.e. salicylic acid and 2,3-dihydroxybenzoic acid, ... ...

    Abstract An accurate and fast method for simultaneous determination of small organic acids and much larger humic acids was developed using high performance size exclusion chromatography. Two small organic acids, i.e. salicylic acid and 2,3-dihydroxybenzoic acid, and one purified humic acid material were used in this study. Under the experimental conditions, the UV peaks of salicylic acid and 2,3-dihydroxybenzoic acid were well separated from the peaks of humic acid in the chromatogram. Concentrations of the two small organic acids could be accurately determined from their peak areas. The concentration of humic acid in the mixture could then be derived from mass balance calculations. The measured results agreed well with the nominal concentrations. The detection limits are 0.05 mg/L and 0.01 mg/L for salicylic acid and 2,3-dihydroxybenzoic acid, respectively. Applicability of the method to natural samples was tested using groundwater, glacier, and river water samples (both original and spiked with salicylic acid and 2,3-dihydroxybenzoic acid) with a total organic carbon concentration ranging from 2.1 to 179.5 mg C/L. The results obtained are promising, especially for groundwater samples and river water samples with a total organic carbon concentration below 9 mg C/L.
    Keywords adsorption ; complexation ; goethite ; iron-oxide ; matter ; molecular-weight ; polydispersity ; spectroscopic properties ; substances ; water
    Subject code 540
    Language English
    Publishing country nl
    Document type Article ; Online
    ZDB-ID 2047990-6
    ISSN 1615-9314 ; 1615-9306
    ISSN (online) 1615-9314
    ISSN 1615-9306
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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