Based on the basic theory of acoustics, this thesis investigates the mathematical modeling of the underwater acoustic channel using the ray-theory model. The main work is the solution of the ray-tracing, eigenrays and transmission loss under varying ocean bottom conditions.

本论文从基本的声学理论出发，对水声信道射线模型的数学建模进行了研究，主要分析了射线跟踪模型在不同海底地形条件下的声线轨迹、本征声线及传播损失的求解问题，完成了射线模型的数学建模和计算机数值求解。

Volume change of the simulation calculation of the transmission loss is given, and the simulation results are acquired .

对模型容积的变化进行了传递损失的仿真计算,并得到了仿真结果。

The transmission loss and the insertion loss experiments of the improved muffler are done.

对改进消声器进行了传声损失、插入损失试验。

Volume change of the simulation calculation of the transmission loss is given, and the simulation results are acquired .

对模型容积的变化进行了传递损失的仿真计算,并得到了仿真结果。

Therefore, proper application of transmission loss allocation methods in Direct-Purchase User has important and practical values.

因此,在大用户直购电中合理运用网损分摊方法有着重要的实用价值。

Then discuss the concept of cost of conservation deeply, describing the analytical relationship of the costs of injection, transmission loss and load outflow costs, and pointing out that this model satisfies the net balance of the costs and profits.

并针对费用守恒原理进行了深入的探讨,明确刻画电源注入费用、输电损耗费用和负荷流出费用问的解析关系,并指出该模型满足全网盈亏平衡。

If the linear and nonlinear absorption are very low, the information transmission loss can be lowered accordingly, which weakens the thermal effect, increases the switching speed and then enhances the reliability and stability of the system.

线性吸收和非线性吸收系数小，可降低信息传输损耗，还可以减小热效应的影响，提高开关速度，增强系统可靠性和稳定性。