Papers by Author: Jing Li

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Authors: An Sheng Lu, Hui Xiu Jin, Zi Hui Li, Jing Li
Abstract: The report presents information with dynamic data and various formats. It is the foundation of the basic business requirements of enterprise and the implementation BI strategy. A good report can reflect enterprise's current operation status and give support to strategic decisions for the future. This paper gives the definition of multidimensional dynamic reports. The method of configuring report information by using XML and realizing the statistics of multidimensional dynamic reports by high-level programming language are also in this paper.
Authors: Zhen Ming Lin, Jing Li, Man Jin, Heng Hua Zhang
Abstract: Material cutting properties can be judged by turning temperature and chip shape. A new method that can measure turning temperature more accurately was discussed in this paper. Compared with the traditional method, results show that turning temperature can be accurately measured through a new method in turning process. Turning temperature become stable and will not jump after 20s later. In addition, the higher the hardness, the higher the energy is needed, leading to the higher turning temperature. The average turning temperature of the quenched specimen, normalized specimen and annealed specimen measured through the new method is 100°C,70°Cand 60°C, respectively. And the chip morphologies of quenched specimen, normalized specimen and annealed specimen are irregular band chips, spiral debris chips and C-shaped chips, respectively.
Authors: Man Jin, Jing Li, Guang Jie Shao
Abstract: The precipitation behaviors and microstructures of nano-precipitates in AA6082 Al-Mg-Si alloy with and without Cu additions during heat treatment process were studied using hardness measurements, TEM, mechanical tests and 3DAP. Meanwhile, the softening process of 6082 alloys with Cu and without Cu, isothermally conditioned at 250°C, has also been investigated. It was found that the rate of age hardening, mechanical properties and thermal stability are higher for the Cu-containing alloy. The TEM and 3DAP observations showed that Q’ precipitates were existed after aged at 170°C for 8h in the alloy with Cu addition. Comparing the hardness, mechanical properties and thermal stability curves, it was concluded that the Q’ precipitates play a major role in improving the age hardening kinetics and properties of 6082 alloy with Cu addition.
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