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768 results on '"Song, Ren‐Jie"'

2. PyRetri: A PyTorch-based Library for Unsupervised Image Retrieval by Deep Convolutional Neural Networks

Author

Hu, Benyi, Song, Ren-Jie, Wei, Xiu-Shen, Yao, Yazhou, Hua, Xian-Sheng, and Liu, Yuehu

Subjects
Computer Science - Information Retrieval, Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning, Computer Science - Multimedia
Abstract

Despite significant progress of applying deep learning methods to the field of content-based image retrieval, there has not been a software library that covers these methods in a unified manner. In order to fill this gap, we introduce PyRetri, an open source library for deep learning based unsupervised image retrieval. The library encapsulates the retrieval process in several stages and provides functionality that covers various prominent methods for each stage. The idea underlying its design is to provide a unified platform for deep learning based image retrieval research, with high usability and extensibility. To the best of our knowledge, this is the first open-source library for unsupervised image retrieval by deep learning., Comment: Accepted by ACM Multimedia Conference 2020. PyRetri is open-source and available at https://github.com/PyRetri/PyRetri

Published
2020

9. Adsorption Behavior and Kinetics of 1,4-Dioxane by Carbon Aerogel.

Author

Lu, Tianyu, Huang, Huihui, Lv, Guifen, Li, Fei, Song, Ren-jie, and Cai, Yuting

Subjects
ADSORPTION kinetics, MICROPOROSITY, ADSORPTION isotherms, AEROGELS, ADSORPTION capacity, SCANNING electron microscopes
Abstract

1,4-dioxane is a potential carcinogen in water and is difficult to deal with due to its robust cycloether bond and complete miscibility with water. To remove 1,4-dioxane in an economically viable and environmentally friendly way, a series of carbon aerogels were synthesized as adsorbents for 1,4-dioxane. The experiment results showed that adsorption performances were closely related to the preparation conditions of carbon aerogels, such as the molar ratio, heating rate, pyrolysis temperature and residence time, which were carefully controlled. Scanning electron microscope analysis revealed the presence of a three-dimensional porous network structure in carbon aerogels. Brunauer–Emmett–Teller analysis results demonstrated an increase in specific surface area (673.89 m2/g) and total pore volume after carbonization, with an increase in mesoporous porosity and a decrease in microporosity. When considering each variable individually, the highest specific surface area of prepared carbon aerogels was achieved at a pyrolysis temperature of 800 °C, a holding time of 1 h, and a heating rate of 2 °C/min. Under optimal experimental conditions, the adsorption removal of 1,4-dioxane by carbon aerogels exceeded 95%, following quasi-second-order kinetics and Langmuir isothermal adsorption isotherms, indicating that monolayer adsorption on the surface of carbon aerogels occurred. The maximum adsorption capacity obtained was 67.28 mg/g at a temperature of 318 K, which was attributed to the presence of a large proportion of mesopores and abundant micropores simultaneously in carbon aerogels. Furthermore, with the interference of chlorinated solvents such as trichloroethylene (TCE), the removal efficiency of 1,4-dioxane had no obvious inhibition effect. Regeneration experiments showed that after five continuous cycles, the carbon aerogels still kept a comparable adsorption capacity, which illustrates its potential application in 1,4-dioxane-polluted water purification. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Copper‐Catalyzed Oxidative 1,2‐Alkylarylation of Styrenes with Unactivated C(sp3)‐H Alkanes and Electron‐Rich Aromatics via C(sp3)‐H/C(sp2)‐H Functionalization.

Author

Jiang, Hui‐Min, Sun, Qing, Jiang, Jin‐Peng, Qin, Jing‐Hao, Ouyang, Xuan‐Hui, and Song, Ren‐Jie

Subjects
STYRENE, ALKANES, COPPER catalysts, PYRROLES, NATURAL products
Abstract

We have disclosed an alkenes dicarbofunctionalization method to introduce alkyl and electron‐rich aryl across the C=C bond of styrenes under copper catalyst and oxidative conditions, leading to construct C(sp3)‐C(sp2)/C(sp3)‐C(sp3) bonds via dual C−H functionalization. This method realizes the synthesis of 1,1‐diarylalkanes, which are very important skeleton in natural products and drug molecules, through the grafting of electron‐rich aromatics, including indoles, pyrroles, trisubstituted aromatic. [ABSTRACT FROM AUTHOR]

Published
2022
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22. Targeted Inhibition of CCL22 by miR-130a-5p Can Enhance the Sensitivity of Cisplatin-Resistant Gastric Cancer Cells to Chemotherapy

Author

Fang,Qing-Liang, Li,Kai-Chun, Wang,Lei, Gu,Xiang-Lian, Song,Ren-Jie, and Lu,Song

Subjects
Cancer Management and Research
Abstract

Qing-Liang Fang,1,* Kai-Chun Li,2,* Lei Wang,1 Xiang-Lian Gu,1 Ren-Jie Song,1 Song Lu1 1Department of Radiation Oncology, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of China; 2Department of Oncology, Tianyou Hospital Affiliated to Tongji University, Shanghai, People’s Republic of China*These authors contributed equally to this workCorrespondence: Qing-Liang FangDepartment of Radiation Oncology, Longhua Hospital Shanghai University of Traditional Chinese Medicine, Shanghai, People’s Republic of ChinaTel +8621-64385700Email yuxun9582581581@163.comObjective: This study set out to explore the regulatory mechanism of miR-130a-5p in cisplatin (DDP)-resistant gastric cancer (GC) cells.Materials and Methods: Forty cases of GC and paracancerous tissues were collected, and the miR-130a-5p and CCL22 levels were detected by qRT-PCR. DDP-resistant cell lines of GC cells were established. Cell viability, invasion, and apoptosis were measured by CCK-8, Transwell, and flow cytometry, respectively. The relationship between miR-130a-5p and CCL22 was verified by dual-luciferase reporter enzyme, and the protein levels of caspase-3, bax, bcl-2, and CCL22 were determined by Western blot.Results: miR-130a-5p was low expressed in GC tissues and cells, while CCL22 showed marked negative correlation, and the area under the curve (AUC) for diagnosing GC was not less than 0.850. Up-regulating miR-130a-5p or knocking down CCL22 expression can inhibit the proliferation and invasion of GC cells and promote their apoptosis, reverse the resistance of NCI-N87/DDP to DDP, and also enhance the chemosensitivity of GC cells. Dual-luciferase reporter enzyme identified that there was a targeted relationship between miR-130a-5p and CCL22. At the same time, miR-130a-5p and CCL22 were up-regulated or down-regulated, and the malignant proliferation, invasion, apoptosis, and DDP chemotherapy resistance of the cells had no difference compared with miR-NC with transfection-unrelated sequences.Conclusion: Up-regulating miR-130a-5p can enhance the sensitivity of DDP-resistant GC cells to chemotherapy and regulate their biological function by targeted inhibition of CCL22.Keywords: miR-130a-5p, CCL22, cisplatin, gastric cancer, chemosensitivity

Published
2020

37. Intermolecular oxidative decarbonylative [2 + 2 + 2] carbocyclization of N-(2-ethynylaryl)acrylamides with tertiary and secondary alkyl aldehydes involving C(sp3)–H functionalization† †Electronic supplementary information (ESI) available. CCDC 1438591. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c6sc02451c Click here for additional data file. Click here for additional data file

Author

Li, Yang, Pan, Gao-Hui, Hu, Ming, Liu, Bang, Song, Ren-Jie, and Li, Jin-Heng

Subjects
Chemistry
Abstract

A new metal-free oxidative decarbonylative [2 + 2 + 2] carbocyclization of N-(2-ethynylaryl)acrylamides with tertiary and secondary alkyl aldehydes is described., A new metal-free oxidative decarbonylative [2 + 2 + 2] carbocyclization of N-(2-ethynylaryl)acrylamides with tertiary and secondary alkyl aldehydes is described. This reaction enables the formation of three new C–C bonds in a single reaction by a sequence of oxidative decarbonylation, radical addition across C–C unsaturated bonds, C–H functionalization and annulation, and represents the first oxidative decarbonylative [2 + 2 + 2] carbocyclization approach using tertiary and secondary alkyl aldehydes as a two carbon unit for assembling six-membered carbocycle-fused polycycles.

Published
2016

38. Radical-mediated alkoxypolyhaloalkylation of styrenes with polyhaloalkanes and alcohols via C(sp3)–H bond cleavage.

Author

Liang, Yun-Yan, Huang, Jing, Ouyang, Xuan-Hui, Qin, Jing-Hao, Song, Ren-Jie, and Li, Jin-Heng

Subjects
SCISSION (Chemistry), STYRENE, VITAMIN E, ALCOHOL, ESTRONE
Abstract

We have developed a new radical-mediated alkoxypolyhaloalkylation of styrenes with polychloroalkanes and alcohols for the facile synthesis of complex polyhaloalkanes. 4-Methoxybenzenediazonium tetrafluoroborate is a good radical initiator for this transformation. This protocol is well applied to the late-stage functionalization of complex molecules, including vitamin E, estrone and cholesterol derivatives. [ABSTRACT FROM AUTHOR]

Published
2021
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