基于DSP的液晶显示器接口设计及控制实现

介绍TMS320LF2407型DSP的主要特点和LCM320240液晶显示模块的基本使用方法.在此基础上讨论了DSP与液晶显示屏之间采用数字I/O口模拟时序的硬件接口设计方案,给出了基于C语言具体的实现方法,最终实现了DSP与LCM320240的良好接口,并在实际系统应用中取得了成功.同时,可为其他DSP与LCD的接口设计和控制实现提供参考.     

基于TMS320F2808的矩阵变换器的研究与实现

本文介绍了矩阵变换器的特点，重点阐述了基于32位DSP TMS320F2808的矩阵变换器的设计与实现，该系统主要由主控制器、输入电压状态检测、译码及隔离驱动、电流检测、上位机通讯等电路组成，最后给出了实验结果。结果表明该系统能输出频率、电压均可在线调节的正弦波。     

X_0(2900) and X_1(2900):Hadronic Molecules or Compact Tetraquarks

Very recently the LHCb collaboration reported their observation of the first two fully open-flavor tetraquark states,the X₀(2900) of J^P=0⁺ and the X₁(2900) of J^P=1^-.We study their possible interpretations using the method of QCD sum rules,paying special attention to an interesting feature of this experiment that the higher resonance X₁(2900) has a width significantly larger than the lower one X₀(2900).Our res...     

Revisiting hidden-charm pentaquarks from QCD sum rules

We revisit hidden-charm pentaquark states P_c(4380) and P_c(4450) using the method of QCD sum rules by requiring the pole contribution to be greater than or equal to 30% in order to better that the one-pole parametrization is valid. We find two mixing currents, and our results suggest that P_c(4380) and P_c(4450) can be identified as hiddencharm pentaquark states having J~P= 3/2~-and 5/2~+, respectively. However, there still exist other possible spin-parity assignments, such as J~P = 3/2~+ and J~P = 5/2~-, which must be clarified in further theoretical and experimental studies.     

QCD Axial Anomaly Enhances the ηη' Decay of the Hybrid Candidate η1（1855）

We study the hybrid mesons with the exotic quantum number I^GJ^PG=0⁺1^-+ and investigate their decays into the ηη’,a₁（1260）π,f₁（1285）η,f₁（1420）η,K^*（892）■,K₁（1270）■,and K₁（1400）■channels.It is found that the QCD axial anomaly enhances the decay width of the ηη’ channel although this mode is strongly suppressed by the small p-wave phase space.Our results support the interpretation of the η     

Exotic ΩΩ dibaryon states in a molecular picture

We investigate the exotic ΩΩ dibaryon states with J^P=0⁺and 2⁺in a molecular picture.We construct a tensorΩΩmolecular interpolating current and calculate the two-point correlation function within the method of QCD sum rules.Our calculations indicate that the masses of the scalar and tensor dibaryon states are mΩΩ,0⁺=(3.33±0.51)GeV and mΩΩ,2⁺=(3.15±0.33)GieV,respectively,which are below the 2mΩthreshold.Within error,these results do not negate the existence of loosely bound molecularΩΩdibaryon states.These exotic strangeness S=-6 and doubly-chargedΩΩdibaryons,if they exist,may be identified in heavy-ion collision processes in the fu-ture.