Papers by Author: Peng Zhang

Abstract: Panicle related characteristics of rice have close relationship with rice yield. Among the 48 panicle related characteristics of rice DUS test, 8 quantitative characteristics were used to research whether environmental changes had impact on their expression. Results showed that, (1) in general, measurements of the 8 characteristics of the same variety in different environments were visibly different, and when measurements were translated into “notes” according to “DUS Test Guideline of Rice”, such difference could be narrowed, indicating the 8 characteristics were sensitive to environmental changes, while corresponding expression states and “notes” could weaken such influence; (2) from the results of SPSS statistic analysis, environment factor were less influential than variety factor to the 8 characteristics; (3) compared with previous research, the 8 panicle related quantitative characteristics were less affected by environmental changes than quantitative characteristics of vegetative growing period; (4) “notes” difference of the same variety in different environments were correlated with significance analysis of environment impact on characteristic expression, revealing the potential of statistic analysis in checking the availability of results of DUS tests gained from different test locations. To reduce the impact of environmental changes to characteristic expression, suggestion of fixing the DUS test of the same plant genus and species in one appointed station was also made in this study.

Abstract: For the thermal safety evaluation of energetic materials, the experimental devices, test method, conditions of determination, numerical calculation and simulation are listed in this paper on thermal explosion experiment both at home and abroad. By listing typical examples and comparing the existing researches, current study and developing trend of thermal explosion experiment are summarized and prospected.

Abstract: Simulation technology provides a powerful tool for the package design. Parasitic are one of the most important factors for press pack IGBT. By the aid of the simulation software, the package parasitic is extracted and the current distribution among paralleled chips is analyzed. Simulation results confirm the theoretical analysis and verify the efficacy of the new approach.

Abstract: Redistributions of implanted species after thermal annealing in polycrystalline silicon (poly-silicon) were studied by secondary ion mass spectrometry. Ten different elements were implanted into poly-silicon films grown on Si substrates. The implanted energies were chosen such that the expected ion range is within the poly-silicon film. Thermal anneals were carried out at temperatures between 300°C and 1000°C in flowing high purity Ar gas. Three different diffusion behaviors have been observed for these elements. For Be, Na, Ga, and Cr, most of the implanted ions diffused out to the surface of the poly-silicon film after anneal at 1000°C. For K, Ca, Ti, and Ge, the impurity ions diffused deeper into the bulk after anneal at 1000°C. For Cl and Mn ions, the concentration distributions became narrower when annealed at high temperatures.