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Chinese Physics B 2022年第8期31卷 530-535页

作者： Xiangyizheng Wu Jian Xu keling gong Chongfeng Shao Yang Kou Yuxuan Zhang Yong Bo Qinjun Peng Key Laboratory of Solid-State Laser Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Key Laboratory of Functional Crystal and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Optical Physics and Engineering Technology Qilu ZhongkeJinan 250000China University of Chinese Academy of Sciences Beijing 100190China

High-power laser induced thermal blooming effects in a closed chamber with three different gases are investigated theoretically and experimentally in this work. In the theoretical treatment, an incompressible gas turbulent model is *** the numerical simulation the gas refractive index as a function of both the temperature and pressure is taken into consideration. In the experimental study the pump-probe technology is adopted. A high-power 1064-nm fiber laser with maximum output power of 12 k W is used to drive the gas thermal blooming, and a 50-m W high-beam-quality 637-nm laser diode(LD)is used as a probe beam. The influences of the gas thermal blooming in the chamber on the probe beam wavefront and beam quality are analyzed for three different gases of air, nitrogen, and helium, respectively. The results indicate that nitrogen is well suitable for restraining thermal blooming effect for high-power laser. The measured data are in good agreement with the simulated results.

关键词： laser radiation numerical simulation propagation thermal blooming

Pump pulse characteristics of quasi-continuous-wave diode-side-pumped Nd:YAG laser

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Chinese Physics B 2022年第5期31卷 355-359页

作者： Zexin Song Qi Bian Yu Shen keling gong Nan Zong Qingshuang Zong Yong Bo Qinjun Peng Key Laboratory of Solid State Laser Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Key Laboratory of Function Crystal and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100190China Southwest Institute of Technical Physics Chengdu 610041China

The influence of pumping laser pulse on the property of quasi-continuous-wave(QCW)diode-side-pumped Nd:YAG laser is investigated theoretically and *** remaining a fixed duty cycle,the average output power increases,and the corresponding thermal focal length shorten with the increase of the pump pulse duration,which attributes to the decrease of the ratio of pulse buildup time to the pulse *** a pump power of 146 W,the laser output power changes from 65.1 W to 81.2 W when the pulse duration is adjusted from 150μs to 1000μs,confirming a significant enhancement of 24.7%.A laser rate equation model incorporating the amplified spontaneous emission is also utilized and numerically solved,and the simulated results agree well with the experimental data.

关键词： pump pulse duration diode-side-pumped pulsed Nd:YAG laser laser rate equation amplified spontaneous emission

缺氧诱导因子-1信号通路在高眼压模型中的表达

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Eye Science 2017年第3期32卷 125-133页

作者：吴克玲龚若文董旭左成果高新博林明楷葛坚中山大学中山眼科中心眼科学国家重点实验室广州510060

目的:研究缺氧诱导因子-1(hypoxia inducible factor-1,HIF-1)信号通路在高眼压状态下的表达情况。方法:利用前房注射磁性微球法建立大鼠高眼压动物模型,通过荧光金逆行标记观察视网膜神经节细胞(retinal ganglion cells,RGCs)的存活情... 详细信息

目的:研究缺氧诱导因子-1(hypoxia inducible factor-1,HIF-1)信号通路在高眼压状态下的表达情况。方法:利用前房注射磁性微球法建立大鼠高眼压动物模型,通过荧光金逆行标记观察视网膜神经节细胞(retinal ganglion cells,RGCs)的存活情况,提取视网膜组织行Western印迹检测H I F-1α、血管内皮生长因子-A(vascular endothelial grow th factor A,VEGF-A)-和促红细胞生成素(er y thropoietin,EPO)的表达,并分析HIF-1α的变化趋势与眼压之间的关系。结果:高眼压1 d时平均眼压为(40.33±2.94)mm Hg,第3天为(68.83±2.85)mm Hg,第10天时下降至(43.67±3.67)mm Hg,后趋于稳定,与对照眼相比差异均有统计学意义(P<0.01)。高眼压2周时中央、中间和周边视网膜的RGCs存活率分别为61.1%±1.1%,68.5%±8.5%和73.6±3.6%,至高眼压3周迅速下降,分别为33.2%±3.2%,43.4%±3.4%和51.4%±2.1%。高眼压3 d时,眼压值达最高,HIF-1α,VEGF-A和EPO的表达亦达高峰,与对照组相比差异均有统计学意义(P<0.01);后随着眼压值下降,表达也随之逐渐减少。眼压升高3 d,7 d,2周分别与对照组的HIF-1α/GAPDH的蛋白灰度比和眼压值间的相关系数为0.977,0.886,0.763,差异具有统计学意义(P<0.01)。结论:HIF-1α的表达在一定条件下与眼压值呈正相关,该通路的早期激活可能在高眼压病程中扮演重要的角色。

关键词：高眼压视网膜神经节细胞缺氧诱导因子-1 血管内皮生长因子-A 促红细胞生成素

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中原城市群文旅合作发展的动能与路径

社会科学家 2022年第3期37卷 42-49页

作者：龚异王克岭谭心云南大学工商管理与旅游管理学院云南昆明650091

随着中原城市群发展战略的落地实施,豫、冀、鲁、晋、皖五省一体化发展趋势加快。而中原城市群文旅合作发展,是推动该区域一体化发展的重要举措。得益于深厚的文化底蕴、便捷的交通网络、互补的产业资源、共通的发展诉求,通过强化区域... 详细信息

随着中原城市群发展战略的落地实施,豫、冀、鲁、晋、皖五省一体化发展趋势加快。而中原城市群文旅合作发展,是推动该区域一体化发展的重要举措。得益于深厚的文化底蕴、便捷的交通网络、互补的产业资源、共通的发展诉求,通过强化区域合作来带动文化旅游发展,使中原城市群文旅合作发展成为联动五省经济社会协同发展的黏合剂。然而,受制于市场管理不到位、文化挖掘不深入、产业集群不显著、营销规划不系统、产品供需不匹配等影响因素,中原城市群文化旅游合作仍面临着诸多现实困境、体制障碍与机制缺陷。基于此,需要从政策法规的完善、合作氛围的营造、文化内涵的挖掘、文旅资源的整合、产业集群的构建、精品产品的打造、文旅品牌的宣贯等方面精准施策,共同助力文化旅游高质量发展与区域一体化发展。

关键词：中原城市群文化旅游合作动力区域一体化发展区域文化

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环割对鸡嘴荔成花及坐果影响的研究

广西农业生物科学 2005年第2期24卷 127-129,144页

作者：唐志鹏潘介春陆贵锋徐华福符可林刘强庞庆功吴锋广西大学农学院合浦县农业综合开发有限责任公司广西合浦536100 合浦县科技局广西合浦536100

研究了冬季主干环割和花期主枝环割处理对鸡嘴荔成花率和坐果率的影响,试验结果表明:冬季主干环割能有效地控制冬梢的抽生,促进花芽分化,提高末级枝条成花率;花期主枝环割能明显增加雌花数,并提高坐果率;冬季主干环割结合花期主枝环割... 详细信息

研究了冬季主干环割和花期主枝环割处理对鸡嘴荔成花率和坐果率的影响,试验结果表明:冬季主干环割能有效地控制冬梢的抽生,促进花芽分化,提高末级枝条成花率;花期主枝环割能明显增加雌花数,并提高坐果率;冬季主干环割结合花期主枝环割的处理效果最显著,是提高鸡嘴荔产量的有效途径。

关键词：荔枝鸡嘴荔环割成花率坐果率