To develop a methodology to fulfill hydraulic analysis on asymmetry and irregular topology structure networks, we proposed a method that can fully adapt on 3D asymmetric and irregular topology structure of networks. The modeling approach is illustrated in detail and compared with traditional methods using a district heating scenario. It provides instructions for other researches.

An algorithm based on object-oriented(00) method is proposed.All pipe components in network topology structure are given special object,properties.Hydraulic calculation models are expressed by object methods.Boundary conditions variations are reflected by object events.Then hydraulic calculation can be solved as traversing all pipe components.Two cases are calculated and analyzed.It indicates that the method can effectively handle hydraulic imbalance caused in structure or in heat sources of a multi-source looped-pipe network with small deviations.

A finite element model is developed to simulate short pulsed laser in turbid media by solving a transient radiative transfer equation. The model employs diffuse synthetic acceleration to reduce computation time and improve solution efficiency, especially for scattering dominated media, It indicates that the model should adopt analytical formulation to deal with scattering term produced by pulsed laser since it accurately simulates sharp changed wave-front without any numerical diffusion and oscillation. Computation time of diffusion synthetic acceleration is about 50% to 60% that of source iteration.