The orthogonality relationship is applied to the treatment of boundary conditions to decouple the coefficient equations , and the explicit solutions are obtained 并将正交关系应用于可对角化边界条件的处理，实现了求解待定系数方程组的解耦，求得问题的显式封闭解。
The functional relation of flowing coefficient with flowing pressure was described as a parabolic function , and a new type of inflow performance relationship which contained 3 undetermined coefficients was setup 摘要假设油井流动系数为二次抛物线函数，建立了包含3个待定系数的新型通用油井流入动态方程。
In this paper , the unified structure method on some symmetrical type multinomial partition base is given ; the unified partition program of multinomial is established by using the method of undetermined coefficients 摘要给出了不同对称类型多项式分拆基的统一构造方法，以逐步待定系数法为基础，编制了多项式统一分拆程序。
According to complexity of current measuring method of temperature field , a new method is presented and the display of two - dimension temperature field is implemented . he xiao - yan ( control theory and control engineering ) directed by associate prof 针对火焰温度场测量现有方法的复杂性，提出了利用待定系数法进行曲线拟合的新的温度场测量方法，实现了二维温度场的显示。
According to test results of three or more than three points of flowing pressure and corresponding liquid output , the regression equations that contained the 3 undetermined coefficients were setup by the least squares method rule , and the undetermined coefficients were solved by the optimization method 根据3点或更多点稳定工作制度下产量与对应流压的测试数据，建立了确定3个待定系数的非线性代数方程组。
Finally , being aimed at a certain machine model , a experiment research about the means of relief valve to reduce hydraulic impact is carried out , which prove the founded prove founded mathematics model . also , some pending coefficient are amended and the optimum pressure of relief valve is determined . at the same time , a experiment and emulation research about the means of accumulator to decrease hydraulic impact is carried put , in which the optimum pneumatic pressure and the optimum primitive capacity of accumulator were determined 最后针对某一具体机型，对用溢流阀方式减小液压冲击进行了实验研究，验证了所建立的数学模型并修正了待定系数，确定了溢流阀的最优调定压力；对用蓄能器方式减小液压冲击进行了实验和仿真研究，确定了蓄能器的最优充气压力和最优初始容积。
The osmotic pressure test was developed to determine the unknown , finite strain consolidation coefficient and convection coefficient in the mathematical model . the two coefficients both varied with effective stress and depth and were functions of initial void ratio , compressibility , permeability and permeability derivative along depth . a precise time step integration method was proposed to solve the finite strain osmotic consolidation equation with varied coefficients 设计渗压固结试验确定理论模型中的待定系数有限应变固结系数和有限应变固结对流项系数，这两个系数均为随有效应力和土层深度变化的量，并且体现软土初始孔隙比，压缩性、渗透性及其沿深度变化等因素的综合影响。
Abstract : a group of phase shifting algorithms is derived by the method of undeterminedcoefficients ( ucm ) . the unknown coefficients are set in a general algorithm expression , and then solved by adding bonding equations according to error compensation requirements . thus the algorithm design and error alalysis are carried out simultaneously . phase shifting algorithms derived by this method are insensitive to one or more error sources which are considered in algorithm design 文摘:提出了一种以误差补偿为目的的新的相移算法设计方法?待定系数法，该方法首先在算法表达式中引入一系列待定参数，根据对误差补偿的要求提供约束方程，从而解出这些未知参数.待定系数法使得算法设计和误差分析是同时进行的，改变了以往先设计算法再进行误差分析和评价的过程，由待定系数法导出的相移算法对算法设计中所考虑的误差源具有良好的补偿性能
The mathematic model of predicting the horizontal load subjected to aeroplane undercarriage tyre based on the drop - tests was built by analyzing dynamic loads acting on drop - test platform which is supported by three - poles , and the coefficients in the mathematic model were determined by means of the least - square method according to the results of static tests 摘要通过分析3点支撑落震平台的动态受力情况，确定了起落架机轮投放到落震平台上后，落震平台水准方向的各种载荷情况，从而利用测量落震平台水准载荷的间接测量方法，建立了起落架机轮水准载荷测量方法的数学模型， ?采用在落震试验台水准方向上进行试验标定的方法，确定了数学模型中的有关待定系数。
