目的对V型滤池的设计进行标准化处理,研发V型滤池参数化设计与绘图系统.方法以《室外给水设计规范》(GB50013—2006)为依据,Auto CAD为二次开发平台,利用其内嵌的VBA语言、可视化接口和Active X Automation技术,选用滤速为设计控制参数...目的对V型滤池的设计进行标准化处理,研发V型滤池参数化设计与绘图系统.方法以《室外给水设计规范》(GB50013—2006)为依据,Auto CAD为二次开发平台,利用其内嵌的VBA语言、可视化接口和Active X Automation技术,选用滤速为设计控制参数,反冲洗强度、反冲洗周期、反冲洗时间等为辅助设计参数,建立V型滤池计算模型和参数化绘图模块.结果创建多个绘图点计算定位和参数化绘图的基本函数;系统自动完成滤池主体,水反冲洗、气反冲洗和气水联合反冲洗系统设计;确定V型滤池各部分的尺寸,并按规范对计算结果自动进行校核.结论利用所建模型和基本函数直接调用计算结果,完成V型滤池参数化绘图工作,自动生成CAD图形.展开更多
We present experimental observations of soliton pulsations in the net normal-dispersion fiber laser by using the dispersive Fourier transform(DFT) technique. According to the pulsating characteristics, the soliton pul...We present experimental observations of soliton pulsations in the net normal-dispersion fiber laser by using the dispersive Fourier transform(DFT) technique. According to the pulsating characteristics, the soliton pulsations are classified as visible and invisible soliton pulsations. The visible soliton pulsation is converted from single-into dual-soliton pulsation with the common characteristics of energy oscillation and bandwidth breathing. The invisible soliton pulsation undergoes periodic variation in the spectral profile and peak power but remains invariable in pulse energy. The reason for invisible soliton pulsation behavior is periodic oscillation of the pulse inside the soliton molecule. These results could be helpful in deepening our understanding of the soliton pulsation phenomena.展开更多
Multi-wavelength square pulses are generated in the dissipative soliton resonance(DSR) regime by a Yb-doped fiber laser(YDFL) with a long cavity configuration. The spectral filter effect provided by a passive fiber wi...Multi-wavelength square pulses are generated in the dissipative soliton resonance(DSR) regime by a Yb-doped fiber laser(YDFL) with a long cavity configuration. The spectral filter effect provided by a passive fiber with low-stress birefringence facilitates the establishment of multi-wavelength operation. Through appropriate control of the cavity parameters,a multi-wavelength DSR pulse can be generated in single-and dual-waveband regions. When the multi-wavelength DSR works in the 1038 nm waveband, the pulse duration can broaden from 2 ns to 37.7 ns. The maximum intra-cavity pulse energy is 152.7 nJ. When the DSR works in the 1038 nm and 1080 nm wavebands, the pulse duration can be tuned from2.3 ns to 10.5 ns with rising pump power. The emergence of the 1080 nm waveband is attributed to the stimulated Raman scattering(SRS) effect. Our work might help a deeper insight to be gained into DSR pulses in all-normal-dispersion YDFLs.展开更多
文摘目的对V型滤池的设计进行标准化处理,研发V型滤池参数化设计与绘图系统.方法以《室外给水设计规范》(GB50013—2006)为依据,Auto CAD为二次开发平台,利用其内嵌的VBA语言、可视化接口和Active X Automation技术,选用滤速为设计控制参数,反冲洗强度、反冲洗周期、反冲洗时间等为辅助设计参数,建立V型滤池计算模型和参数化绘图模块.结果创建多个绘图点计算定位和参数化绘图的基本函数;系统自动完成滤池主体,水反冲洗、气反冲洗和气水联合反冲洗系统设计;确定V型滤池各部分的尺寸,并按规范对计算结果自动进行校核.结论利用所建模型和基本函数直接调用计算结果,完成V型滤池参数化绘图工作,自动生成CAD图形.
基金supported by the National Natural Science Foundation of China (Grant No. 41875040)the Natural Science Foundation of Anhui Province, China (Grant No. 2008085MF211)+1 种基金the Foundation for Young Talents in College of Anhui Province, China (Grant No. gxyqZD2019034)the Innovation Fund for Postgraduates of Huaibei Normal University, China (Grant No. CX2022035)。
文摘We present experimental observations of soliton pulsations in the net normal-dispersion fiber laser by using the dispersive Fourier transform(DFT) technique. According to the pulsating characteristics, the soliton pulsations are classified as visible and invisible soliton pulsations. The visible soliton pulsation is converted from single-into dual-soliton pulsation with the common characteristics of energy oscillation and bandwidth breathing. The invisible soliton pulsation undergoes periodic variation in the spectral profile and peak power but remains invariable in pulse energy. The reason for invisible soliton pulsation behavior is periodic oscillation of the pulse inside the soliton molecule. These results could be helpful in deepening our understanding of the soliton pulsation phenomena.
基金supported by the National Natural Science Foundation of China (Grant No. 41875040)the Natural Science Foundation of Anhui Province,China (Grant No. 2008085MF211)+1 种基金the Foundation for Young Talents in College of Anhui Province (Grant No. gxyqZD2019034)the Key Natural Science Research Project for Colleges and Universities of Anhui Province,China (Grant No. KJ2020A0027)。
文摘Multi-wavelength square pulses are generated in the dissipative soliton resonance(DSR) regime by a Yb-doped fiber laser(YDFL) with a long cavity configuration. The spectral filter effect provided by a passive fiber with low-stress birefringence facilitates the establishment of multi-wavelength operation. Through appropriate control of the cavity parameters,a multi-wavelength DSR pulse can be generated in single-and dual-waveband regions. When the multi-wavelength DSR works in the 1038 nm waveband, the pulse duration can broaden from 2 ns to 37.7 ns. The maximum intra-cavity pulse energy is 152.7 nJ. When the DSR works in the 1038 nm and 1080 nm wavebands, the pulse duration can be tuned from2.3 ns to 10.5 ns with rising pump power. The emergence of the 1080 nm waveband is attributed to the stimulated Raman scattering(SRS) effect. Our work might help a deeper insight to be gained into DSR pulses in all-normal-dispersion YDFLs.
