The Research of OpenGL Geometric Transformation and Conversion of the Windows Screen Coordinates

分析openGL三维图形显示流程,讨论其坐标变换过程,推导了openGL坐标与Windows屏幕坐标的转换关系,给出了在MFC下实现openGL图形编程的方法。By analysing the processes of openGL 3D graphics and discussng it's coordinate alternation process,the thises derives the trans-formation relationship between openGL coordinate and the Windows screen coordinate. Meanwhile it gives the openGL graphical pro-gramming approach under the platform of MFC.福建省教育厅B类课题(JB0527

智能教学系统研究综述

介绍了智能教学系统的发展历史和国内外发展情况,对于智能教学系统研究存在的问题进行了探讨, 并就智能教学系统的发展趋势提出了自己的看法。福建省科技厅青年科技人才基金资助项目(2007F3103) ;福建省教育厅资助 项目( JA08222) ;厦门市科技计划指导性项目(3502Z20089040

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^