Using minimum water supply cost as objective function , the secondary series of optimal dispatch model was set up . the optimal combination of fixed - speed pump and the optimal range of rate and flow in varied - speed pump station were elaborated . applying these methods for water supply system in yuci city , the result show it can save energy , which illustrate this optimal dispatch model was successful 以供水费用最小为目标函数，建立了给水系统的一级优化调度和二级优化调度的宏观模型；详细阐述了泵站中只有恒速泵时恒速泵的最优组合方法，含有调速泵时，给出了确定调速泵最佳台数、最佳调速范围和调流范围的计算方法。
Then , we use software hspice of synopsys to realize the inductor macromodel , and the circuit system responding to hysteresis mathematic model can be designed well , meantime , the method of building the macromodel lay technical foundation for other circuits design and that simulation results approach to real behaveior 然后,利用synopsys公司的电路仿真软件hspice实现磁芯电感宏观模型,完成了与整个磁滞数学模型相对应的电路系统的设计,为其它电路系统的设计,以及仿真结果更接近实际工作情况奠定了良好的技术基础。
The direct optimal model of multi - objective mixed discrete variables for lager - scale water supply system was established , by replacing complicated network hydraulic equation with nodal pressures macroscopic model and relationship model between pump stations flow and head in water supply systems without tanks or towers , genetic algorithm was developed to solve the direct optimal model 以测压点压力宏观模型、水源供水量和水源供水水头之间的关系模型替代复杂的管网水力平衡方程，建立了大型供水系统的多目标混合离散变量的直接优化调度模型。在没有水池和水塔的供水系统中，利用遗传算法对直接优化调度模型进行求解。
The paper analyze many methods of water demand prediction which include many up to date methods and some in common use , and it bring forward some new combinatorial methods which can meet the need of optimization model in precision , such as season exponent , auto adapt filter , season exponent combined grey model , etc . based on the cost and time of modeling jt mainly study the macroscopic network model which describes the correlation between nodal pressures and water plant discharge 针对时用水量预测模型，采用季节指数法、自适应指数平滑法、季节指数联合自适应过滤法、指数平滑联合自回归法、季节指数联合灰色系统法等具体预测方法，其中数种方法预测精度达到工程要求。实践结果表明，开发的联合法效果较好。考虑到管网宏观模型不但能描述整个管网的工作状态，而且建模所需成本低，运行速度快，省时省力，主要研究了管网宏观模型的建立方法，分析测压点布置原理并编制程序。
Since the concept of superlattice was proposed , vertical transport in superlattice has been investigated widely . the electric field domains and current self - oscillations which result from sequential resonant tunneling between different subbands of the superlattice are very significant phenomena . such kind of oscillation can be uesd to make tunable microwave oscillaors . in this thesis , low temperature transport problem , especially the formation of field domain and the condition of current self - oscillations in doped gaas / alas superlattice with weak coupling are investigated thoroughly and also by combining the macroscopic model with the microscopic one . , the voltage - current characteristic and the current oscillation are simulated . the calculated result is nearly consistent with the experimental data 由超晶格中子能级之间的顺序多阱共振隧穿引起的电场畴及电流自维持振荡现象是其中的一个非常有意义的分支，该现象可用来制作电压调谐微波振荡器。本论文对弱耦合掺杂gaaa alas超晶格中的纵向输运特别是针对低温下的场畴的形成和固定偏压下电流自维持振荡产生的条件进行了深入的探讨，并结合宏观模型和微观模型对超晶格在时变电压作用下的电压-电流特性以及固定偏压作用下的电流特性进行了模拟计算。
