以Info Works ICM构建模型为研究方法,选取西安市东郊纺织城片区灞河2#出水口系统为研究对象,结合现状勘测数据,划定汇水分区,选定暴雨强度公式,确定综合径流系数。利用模型对现状管道能力进行评估、对调蓄池设置位置对管网系统的影响...以Info Works ICM构建模型为研究方法,选取西安市东郊纺织城片区灞河2#出水口系统为研究对象,结合现状勘测数据,划定汇水分区,选定暴雨强度公式,确定综合径流系数。利用模型对现状管道能力进行评估、对调蓄池设置位置对管网系统的影响、调蓄池容积对管网系统的影响以及集中设置与分散设置调蓄池对管网系统的影响等多工况模拟对比分析,提出今后西安市雨水调蓄池设置建设性意见。展开更多
This paper studies the propagation of dipole solitons in highly nonlocal medium by using the variational method. It finds that the dipole solitons will be stable when the input power obeys a restrict value. When the i...This paper studies the propagation of dipole solitons in highly nonlocal medium by using the variational method. It finds that the dipole solitons will be stable when the input power obeys a restrict value. When the incident power does not satisfy the stable conditions, the nonlocal accessible dipole solitons will undergo linear harmonic oscillation. It shows such evolution behaviours in detail.展开更多
The propagation of spatial solitons is systematically investigated in nonlocal nonlinear media with an imprinted transverse periodic modulation of the refractive index. Based on the variational principle and the infin...The propagation of spatial solitons is systematically investigated in nonlocal nonlinear media with an imprinted transverse periodic modulation of the refractive index. Based on the variational principle and the infinitesimal approximation of Maclaurin series expansion, we obtain an analytical solution of such nonlocal spatial solitons and an interesting result that the critical power for such solitons propagation is smaller than that in uniform nonlocal self-focusing media. It is found that there exist thresholds in modulation period and lattice depth for such solitons. A stable spatial soliton propagation is maintained with proper adjustment of the modulation period and the lattice depth.展开更多
Exact solutions of Gaussian solitons in nonlinear media with a Gaussian nonlocal response are obtained.Using the variational approach,we obtain the approximate solutions of such solitons when the degree of the nonloca...Exact solutions of Gaussian solitons in nonlinear media with a Gaussian nonlocal response are obtained.Using the variational approach,we obtain the approximate solutions of such solitons when the degree of the nonlocality is arbitrary.Specifically,we study the conditions for Gaussian solitons that propagate in weakly and highly nonlocal media.We also compare the variational result with the known exact solutions for weakly and highly nonlocal media.展开更多
文摘以Info Works ICM构建模型为研究方法,选取西安市东郊纺织城片区灞河2#出水口系统为研究对象,结合现状勘测数据,划定汇水分区,选定暴雨强度公式,确定综合径流系数。利用模型对现状管道能力进行评估、对调蓄池设置位置对管网系统的影响、调蓄池容积对管网系统的影响以及集中设置与分散设置调蓄池对管网系统的影响等多工况模拟对比分析,提出今后西安市雨水调蓄池设置建设性意见。
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 60677030 and 60808002)the Shanghai Committee of Science and Technology,China (Grant No. 08JC14097)the Shanghai Leading Academic Discipline Program(Grant No. S30105)
文摘This paper studies the propagation of dipole solitons in highly nonlocal medium by using the variational method. It finds that the dipole solitons will be stable when the input power obeys a restrict value. When the incident power does not satisfy the stable conditions, the nonlocal accessible dipole solitons will undergo linear harmonic oscillation. It shows such evolution behaviours in detail.
基金supported in part by the National Natural Science Foundation of China (Grant Nos 60677030 and 60808002)the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No 20060280007)+2 种基金the Science and Technology Commission of Shanghai Municipality, China (Grant No 06ZR14034)Ming Shen is also supported by the Australian Endeavor Research Fellowship scholarshipappreciates the hospitality of the Laser Physics Center during his stay in Canberra
文摘The propagation of spatial solitons is systematically investigated in nonlocal nonlinear media with an imprinted transverse periodic modulation of the refractive index. Based on the variational principle and the infinitesimal approximation of Maclaurin series expansion, we obtain an analytical solution of such nonlocal spatial solitons and an interesting result that the critical power for such solitons propagation is smaller than that in uniform nonlocal self-focusing media. It is found that there exist thresholds in modulation period and lattice depth for such solitons. A stable spatial soliton propagation is maintained with proper adjustment of the modulation period and the lattice depth.
基金Project supported in part by the National Natural Science Foundation of China (Grant Nos 60808002 and 60677030)the Shanghai Leading Academic Discipline Program (Grant No S30105)
文摘Exact solutions of Gaussian solitons in nonlinear media with a Gaussian nonlocal response are obtained.Using the variational approach,we obtain the approximate solutions of such solitons when the degree of the nonlocality is arbitrary.Specifically,we study the conditions for Gaussian solitons that propagate in weakly and highly nonlocal media.We also compare the variational result with the known exact solutions for weakly and highly nonlocal media.
