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25 results on '"Chen, Lingzhen"'

3. Transfer Learning for Sequence Labeling Using Source Model and Target Data

Author

Chen, Lingzhen and Moschitti, Alessandro

Subjects
Computer Science - Computation and Language
Abstract

In this paper, we propose an approach for transferring the knowledge of a neural model for sequence labeling, learned from the source domain, to a new model trained on a target domain, where new label categories appear. Our transfer learning (TL) techniques enable to adapt the source model using the target data and new categories, without accessing to the source data. Our solution consists in adding new neurons in the output layer of the target model and transferring parameters from the source model, which are then fine-tuned with the target data. Additionally, we propose a neural adapter to learn the difference between the source and the target label distribution, which provides additional important information to the target model. Our experiments on Named Entity Recognition show that (i) the learned knowledge in the source model can be effectively transferred when the target data contains new categories and (ii) our neural adapter further improves such transfer., Comment: 9 pages, 4 figures, 3 tables, accepted paper in the Thirty-Third AAAI Conference on Artificial Intelligence (AAAI-19)

Published
2019

6. Single-crystal LiNi0.5Co0.2Mn0.3O2: a high thermal and cycling stable cathodes for lithium-ion batteries

Author

Shang Weili, Lei Chen, Chen Lingzhen, Kong Lingyong, Huang Shaozhen, Ren Wangbao, Ming Sun, and Zhong Zeqin

Subjects
Materials science, 020502 materials, Mechanical Engineering, Thermal decomposition, chemistry.chemical_element, 02 engineering and technology, Cathode, Dielectric spectroscopy, law.invention, Differential scanning calorimetry, 0205 materials engineering, chemistry, Chemical engineering, Mechanics of Materials, law, General Materials Science, Lithium, Thermal stability, Crystallite, Single crystal
Abstract

Single-crystalline LiNi0.5Co0.2Mn0.3O2 (denoted as SC-523) with micron size had been successfully synthesized through a facile method. Electrochemical impedance spectroscopy and differential scanning calorimetry were carried out to identify the improved electrochemical performance and desired thermal stability. Even after 100 cycles, SC-523 still delivered a discharge capacity of 151.1 mA h g−1 (capacity retention with 90.3%) at 1 C in voltage range from 3.0 to 4.5 V (vs. Li/Li+), while polycrystalline spherical LiNi0.5Co0.2Mn0.3O2 (denoted as PC-523) only exhibited 141.7 mA h g−1 (capacity retention with 78.4%). Besides, SC-523 shows a higher decomposition temperature of 332.13 °C, 14.61 °C higher than that of PC-523 during the thermal decomposition. Consequently, single-crystalline particles with robust morphological integrity ensure the enhanced cycling stability and thermal stability.

Published
2019

11. Nano LiFePO4 coated Ni rich composite as cathode for lithium ion batteries with high thermal ability and excellent cycling performance

Author

Ren Wangbao, Zhong Zeqin, Chen Lingzhen, Kong Lingyong, Wan Yuanxin, and Zhu Chengben

Subjects
Materials science, Thermal runaway, Renewable Energy, Sustainability and the Environment, Composite number, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Cathode, 0104 chemical sciences, Calorimeter, law.invention, chemistry, law, Nano, Lithium, Thermal stability, Graphite, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Composite material, 0210 nano-technology
Abstract

Ni-rich LiNi0.82Co0.12Mn0.06O2 (denoted as NCM) is successfully coated by LFP nanoparticles (denoted as NCM@LFP) through physical mechanical fusion in industrial level. The 18650 full cells are assembled with NCM@LFP as cathode, which exhibits quite excellent cycling performance and thermal stability. After 500 cycles, NCM@LFP || Graphite full cell still delivers a discharge capacity of 165.3 mA h g−1 (capacity retention with 91.65%) at 1 C in voltage range from 3.0 to 4.2 V at room temperature. Besides, according to Accelerating rate calorimeter (ARC) test, the onset thermal runaway temperature Tc and self-heating interval time Δt of NCM@LFP || Graphite are much higher than that of NCM || Graphite, respectively, indicating an improved security performance of LFP-coated NCM@LFP || Graphite cell.

Published
2020

14. Single-crystal LiNi0.5Co0.2Mn0.3O2: a high thermal and cycling stable cathodes for lithium-ion batteries.

Author

Zhong, Zeqin, Chen, Lingzhen, Huang, Shaozhen, Shang, Weili, Kong, Lingyong, Sun, Ming, Chen, Lei, and Ren, Wangbao

Subjects
*LITHIUM-ion batteries, *THERMOCYCLING, *DIFFERENTIAL scanning calorimetry, *THERMAL stability, *POLYCRYSTALLINE semiconductors, *CATHODES, *IMPEDANCE spectroscopy
Abstract

Single-crystalline LiNi0.5Co0.2Mn0.3O2 (denoted as SC-523) with micron size had been successfully synthesized through a facile method. Electrochemical impedance spectroscopy and differential scanning calorimetry were carried out to identify the improved electrochemical performance and desired thermal stability. Even after 100 cycles, SC-523 still delivered a discharge capacity of 151.1 mA h g−1 (capacity retention with 90.3%) at 1 C in voltage range from 3.0 to 4.5 V (vs. Li/Li+), while polycrystalline spherical LiNi0.5Co0.2Mn0.3O2 (denoted as PC-523) only exhibited 141.7 mA h g−1 (capacity retention with 78.4%). Besides, SC-523 shows a higher decomposition temperature of 332.13 °C, 14.61 °C higher than that of PC-523 during the thermal decomposition. Consequently, single-crystalline particles with robust morphological integrity ensure the enhanced cycling stability and thermal stability. [ABSTRACT FROM AUTHOR]

Published
2020
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18. Android application of Doctor’s end in E-health system

Author

Chen, Lingzhen

Subjects
E-health care, doctor's client end, Android application, Teknik och teknologier, Engineering and Technology
Abstract

In recent years, with the arrival of information era and the rapid development of the medical health system, there has been a trend for hospitals and medical care centers to record the patients’ medical record electronically rather than by means of old-fashioned paper-based method. It has indeed reduced the workload of medical workers and it simplifies the procedure within the medical system. It is worth mentioning that the growth of mobile medical care is beginning to catch up as a consequence of the incredible popularization of mobile networks and the broad use of mobile devices. A significant possibility is that in the coming years, mobile medical care applications will play a large part of the whole electronic medical care system. This project will mainly focus on presenting the process of developing an Android application of doctor’s end in the electronic healthcare system which makes it possible for doctors to retrieve data from their patients and diagnose them as well as setting up appointments using mobile devices. The development for the doctor’s end application will follow the waterfall development methodology. In this report the functions of the doctor’s end application will be introduced, and how these functions are realized will also be displayed in detail. After the implementation, the app will be tested on an Android device emulator and on real Android mobile devices in order to evaluate their performance. In addition, it will be tested by mobile phone specialists in relation to gathering feedback. Finally, a reasonable conclusion will be drawn with regards to this project including ethical issues.

Published
2013

25. Huang he ga yao = Stammering ballad

Author

CNEX Studio, production company., Pango Pictures Company, production company., First Hand Films (Firm), distributor., Zhang, Nan, 1986- film director, director of photography, editor of moving image work., Chen, Lingzhen (Film producer), film producer., Ha, Sinae, film producer., Zhang, Yong, film producer., and Zhang Ga-song, on-screen participant.

Published
2018

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