LD Data Factory以“4D连续帧真值”为核心,首创“数据采集-标注-质检-评价”闭环,具备AI自动标注、遮挡下目标追踪、跨帧一致性校验、感知性能KPI分析等核心能力。该系统基于多模态融合与时序建模原理,显著提升数据构建效率与质量稳定...LD Data Factory以“4D连续帧真值”为核心,首创“数据采集-标注-质检-评价”闭环,具备AI自动标注、遮挡下目标追踪、跨帧一致性校验、感知性能KPI分析等核心能力。该系统基于多模态融合与时序建模原理,显著提升数据构建效率与质量稳定性,支持SaaS与私有化部署,满足不同客户数据安全与交付需求。人工标注成本降低90%,效率提升3-4倍,已量产交付5500万帧高质4D数据。展开更多
An LD directly-pumped solid-state laser is considered to be one of the most promising mid-infrared light sources because of its simple principle,small size,and compact structure for the generation of mid-infrared(MIR)...An LD directly-pumped solid-state laser is considered to be one of the most promising mid-infrared light sources because of its simple principle,small size,and compact structure for the generation of mid-infrared(MIR)lasers in the 3-5µm band.However,the quantum defect of LD directly-pumped MIR solid-state lasers will be much larger than that of ordinary near-infrared LD pumped solid-state lasers,which may lead to thermal damage and limit their development.In order to solve this problem,the methods of reducing the specific surface area of the crystal and improving the thermal energy released by the crystal structure are discussed,and the opti⁃mal length of the laser crystal is determined.The cooling structures of barium yttrium fluoride laser crystals(Ho^(3+):BY_(2)F_(8))of different lengths were studied by thermal simulation using COMSOL software.The experimen⁃tal results show that the output power can be increased and the thermal stress in the laser crystal can be alleviated by using the laser crystal whose length is slightly shorter than that of the cooler.The final experiment shows that when the pump repetition rate is 15 Hz and the pulse width is 90µs,the single pulse energy is 7.28 mJ at the out⁃put wavelength of 3.9µm,which is about 3 times as large as that of the crystal with the length of 10 mm(2.81 mJ).Such results should be another breakthrough of our team since the first directly-pumped solid-state MIR laser was realized more than a year ago.It might pave the way for the construction of a feasible MIR laser in the near future.展开更多
文摘LD Data Factory以“4D连续帧真值”为核心,首创“数据采集-标注-质检-评价”闭环,具备AI自动标注、遮挡下目标追踪、跨帧一致性校验、感知性能KPI分析等核心能力。该系统基于多模态融合与时序建模原理,显著提升数据构建效率与质量稳定性,支持SaaS与私有化部署,满足不同客户数据安全与交付需求。人工标注成本降低90%,效率提升3-4倍,已量产交付5500万帧高质4D数据。
基金Supported by the National Key Research and Development Program of China(2021YFA0718803)。
文摘An LD directly-pumped solid-state laser is considered to be one of the most promising mid-infrared light sources because of its simple principle,small size,and compact structure for the generation of mid-infrared(MIR)lasers in the 3-5µm band.However,the quantum defect of LD directly-pumped MIR solid-state lasers will be much larger than that of ordinary near-infrared LD pumped solid-state lasers,which may lead to thermal damage and limit their development.In order to solve this problem,the methods of reducing the specific surface area of the crystal and improving the thermal energy released by the crystal structure are discussed,and the opti⁃mal length of the laser crystal is determined.The cooling structures of barium yttrium fluoride laser crystals(Ho^(3+):BY_(2)F_(8))of different lengths were studied by thermal simulation using COMSOL software.The experimen⁃tal results show that the output power can be increased and the thermal stress in the laser crystal can be alleviated by using the laser crystal whose length is slightly shorter than that of the cooler.The final experiment shows that when the pump repetition rate is 15 Hz and the pulse width is 90µs,the single pulse energy is 7.28 mJ at the out⁃put wavelength of 3.9µm,which is about 3 times as large as that of the crystal with the length of 10 mm(2.81 mJ).Such results should be another breakthrough of our team since the first directly-pumped solid-state MIR laser was realized more than a year ago.It might pave the way for the construction of a feasible MIR laser in the near future.
