Search

Your search keyword '"Liu, Weiwei"' showing total 6,259 results
Start Over Author "Liu, Weiwei"
6,259 results on '"Liu, Weiwei"'

601. AKAP12 Expression in HER2-positive Breast Cancer and Its Clinical Significance

Author

CHENG Qian, LIANG Ruipeng, ZHENG Jiayi, FENG Lijin, LIU Weiwei, and LIN Qing

Subjects
breast cancer, akap12, immunohistochemistry, epidermal growth factor receptor2, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Objective To investigate the expression of AKAP12 in HER2-positive breast cancer and its relation with clinicopathological factors and clinical significance. Methods UALCAN database was used to explore AKAP12 mRNA expression in breast cancer and para-cancerous tissues. AKAP12 protein expression in 120 cases of breast cancer tissues, adjacent tissues and 8 cases of metastases tissues were detected by immunohistochemistry. Then we analyzed the relation between AKAP12 protein expression and clinicopathological factors. Bc-GenExMiner v4.4 database was used to explore the relation between AKAP12 mRNA expression and overall survival. The relation between AKAP12 protein expression and overall survival was analyzed by GraphPad Prism 7.0. Results AKAP12 expression in breast cancer tissues was lower than that in para-cancerous tissues (P < 0.05). AKAP12 protein expression in metastasis was lower than that in primary lesion (P < 0.05). AKAP12 was negatively related to tumor size and TNM stage (P < 0.05). Survival analysis showed that patients with low AKAP12 mRNA and protein expression had shorter overall survival than those with high AKAP12 expression (P < 0.05). Univariate and multivariate Cox regression analyses revealed that AKAP12 expression, vascular infiltration and radiotherapy were independent risk factors for the prognosis of HER2-positive breast cancer patients. Conclusion The low AKAP12 expression is related to the prognosis of HER2-positive breast cancer patients.

Published
2020
Full Text
View/download PDF

604. Application of comprehensive exploration technology for water-hazard prevention in coal mine working face

Author

JI Qianhui, HAO Shijun, WANG Cheng, and LIU Weiwei

Subjects
mine water-inrush, water-hazard prevention of coal mine, water-hazard detection of coal mine, comprehensive exploration, audio-frequency electric penetration, directional drilling, water-conductive collapse colum, Mining engineering. Metallurgy, TN1-997
Abstract

Most of existing comprehensive exploration technologies for water-hazard on coal mine working face adopt conventional rotary drilling method with lots of boreholes and heavy workload. In addition, blending deformation of drill pipes, geological condition variation in boreholes and alterations of drilling parameters during construction process would lead to borehole deflection, which may cause wrong decision about water-hazard exploration. For above problems, a comprehensive exploration technology based on directional drilling was proposed and applied to water-hazard detection on fully mechanized mining face of a coal mine. The application process is as follows: Firstly, mine audio-frequency electric penetration technology is used in the comprehensive exploration technology to detect anomalous area with low apparent resistivity on the working face, and then directional drilling technology is adopted to directly expose water-rich zone. It is determined that there is a water-conductive collapse column of Ordovician limestone karst in the anomalous area through observing water gushing in the boreholes and chemically examine quality of the water. Meanwhile, extension state and boundary of the water-conductive collapse column in the working face are delineated. Position of open-off cut is redesigned according to comprehensive exploration results, so as to effectively eliminate hidden water-inrush danger caused by exposing the water-conductive collapse column during mining process.

Published
2020
Full Text
View/download PDF

630. Terahertz imaging with sub-wavelength resolution by femtosecond laser filament in air

Author

Zhao, Jiayu, Chu, Wei, Guo, Lanjun, Wang, Zhi, Cheng, Ya, Liu, Weiwei, and Xu, Zhizhan

Subjects
Physics - Optics
Abstract

Terahertz (THz) imaging provides cutting edge technique in biology, medical sciences and non-destructive evaluation. However, due to the long wavelength of the THz wave, the obtained resolution of THz imaging is normally a few hundred microns and is much lower than that of the traditional optical imaging. We introduce a sub-wavelength resolution THz imaging technique which uses the THz radiation generated by a femtosecond laser filament in air as the probe. This method is based on the fact that the femtosecond laser filament forms a waveguide for the THz wave in air. The diameter of the THz beam, which propagates inside the filament, varies from 20 {\mu}m to 50 {\mu}m, which is significantly smaller than the wavelength of the THz wave. Using this highly spatially confined THz beam as the probe, THz imaging with resolution as high as 20 {\mu}m (~{\lambda}/38) can be realized., Comment: 10 pages, 7 figures

Published
2013

631. Terahertz Wave Guiding by Femtosecond Laser Filament in Air

Author

Zhao, Jiayu, Zhang, Yizhu, Wang, Zhi, Chu, Wei, Zeng, Bin, Cheng, Ya, Xu, Zhizhan, and Liu, Weiwei

Subjects
Physics - Optics
Abstract

Femtosecond laser filament generates strong terahertz (THz) pulse in air. In this paper, THz pulse waveform generated by femtosecond laser filament has been experimentally investigated as a function of the length of the filament. Superluminal propagation of THz pulse has been uncovered, indicating that the filament creates a THz waveguide in air. Numerical simulation has confirmed that the waveguide is formed because of the radially non-uniform refractive index distribution inside the filament. The underlying physical mechanisms and the control techniques of this type THz pulse generation method might be revisited based on our findings. It might also potentially open a new approach for long-distance propagation of THz wave in air., Comment: 5 pages, 6 figures

Published
2013

634. Efficient Traceable Oblivious Transfer and Its Applications

Author

Liu, Weiwei, Zhang, Yinghui, Mu, Yi, Yang, Guomin, Tian, Yangguang, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Su, Chunhua, editor, and Kikuchi, Hiroaki, editor

Published
2018
Full Text
View/download PDF

635. An Integrated Method of Detecting Copy Number Variation Based on Sequence Assembly

Author

Liu, Weiwei, Gao, Jingyang, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Huang, De-Shuang, editor, Bevilacqua, Vitoantonio, editor, Premaratne, Prashan, editor, and Gupta, Phalguni, editor

Published
2018
Full Text
View/download PDF

636. A Comprehensive Analysis of Interval Based Network Flow Watermarking

Author

Shi, Jin, Zhang, Li, Yin, Shuijun, Liu, Weiwei, Zhai, Jiangtao, Liu, Guangjie, Dai, Yuewei, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Sun, Xingming, editor, Pan, Zhaoqing, editor, and Bertino, Elisa, editor

Published
2018
Full Text
View/download PDF

648. Online Partial Label Learning

Author

Wang, Haobo, primary, Qiang, Yuzhou, additional, Chen, Chen, additional, Liu, Weiwei, additional, Hu, Tianlei, additional, Li, Zhao, additional, and Chen, Gang, additional

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results