A batch least - squares maximum likelihood estimator is employed to calibrate the model coefficients of accelerometer and a polynomial post - fit method is used to establish temperature models of these coefficients . the temperature models of accelerometer bias and scale factor of accelerometer are established between - 20oc and 50 oc . after compensating the temperature error by using these models , the post - fit residuals of the accelerometer output have been improved to 10 ? 5 g , and the trend term of accelerometer changing with temperature basically vanished 采用最小二乘极大似然估计和多项式拟合的方法,分析加速度计静态模型系数随加速度计壳体温度变化的规律,建立了- 20oc 50oc之间加速度计零偏和标度因数误差的温度模型,应用该模型对加速度计温度干扰进行补偿,补偿后,加速度计输出的拟合均方根误差一到二个数量级,并且基本上消除了加速度计输出随温度变化的趋势项,使得加速度计测量精度得到了明显提高。
Besides , the converters have unmodeled dynamics . so the traditional controller for hvdc based on the classical control theory can not meet the requirements in practice . although , pi controllers are widely used in the hvdc systems , they have high sensitive responses to random disturbances , low robust performance , and can not solve some problems in power systems , such as unmodeled dynamics , nonlinear uncertainties 直流输电线路中的换流器具有很强的非线性，系统的运行工况随时都会发生改变，系统扰动发生的地点、类型及严重程度具有随机性；此外，换流器还含有未建模动态部分，这些因素使得基于直流输电系统准静态模型的常规控制器设计方法常常不能很好地满足系统的实际要求。
The dynamic model is a typical nonlinear distributed - parameter system with high dimension about19xn x4 , where n is the section number in one reformer . method of lines is adopted to reduce these partial differetial equations ( pdes ) into n lumped - parameter ordinary differetial equations ( odes ) solved by numerical algorithm 在静态模型基础上建立了全流程主要装置(重整反应器、加热炉、分离罐)的动态模型，采用分段线性化方法对重整反应分布参数模型离散化成一组常微分线性方程组进行了求解。
According to the practical needs of enterprise technical archive management , this paper provides the system performance requirement and developing principle . based on system analysis , it gives the use case diagram , system static model and system dynamic model . besides , it designs many functions , such as system login , system management , borrowing , renewing , inquiry , statistics , deletion , printing and report , lending management , check and approval activity diagrams , etc 从企业技术档案管理的实际需要出发,提出了企业技术档案管理系统的性能要求和开发原则,在系统分析的基础上建立了系统用例图、系统的静态模型、系统的动态模型,设计了系统登录、系统管理、借阅、续借、查询、统计、销毁、打印报表、借阅管理、审批活动图等功能。
In chapter 3 , we chiefly study on the effectivity of third - degree price discrimination under two manufacturers , generally the studies on the effectivity of third - degree price discrimination in former papers were based on monopoly market , that is there is only one monopoly manufacturer in market . this paper expand the content of its research to the market conditions of two factories , based on a complete static information model and the linear demand functions and linear cost functions , the paper study the effectivity of third - degree price discrimination under two manufacturers , which compete in the same markets . it further respectively put forward the calculation formulas of the maximum sales volume and the maximum price and the maximum profit which belong to both manufacturers who is on the condition of common price or third - degree price discrimination in the two sub - markets , and also it put forward the necessary and sufficient conditions for third - degree price discrimination to be effective or to be same as common price 本文第三章主要研究了两厂商情形下的三度价格歧视的有效性问题,现有文献对于三度价格歧视的有效性问题的研究基本上都是基于垄断厂商情形,即市场上只有一个垄断厂商的情形,而本文将其研究的内容拓展到了两厂商情形,基于完全信息静态模型研究了竞争市场上的两厂商在线性需求函数和线性成本函数条件下的三度价格歧视的有效性问题,并分别给出了两厂商在两个子市场上,在单一价格条件下以及歧视价格条件下的最优销售量、最优价格和最大利润的计算公式,给出了各厂商价格歧视有效和价格歧视无异于单一价格的充要条件。
Compared with the static model in errors , dynamic degrees and response curves , dynamic model is better . when voltage is above 0 . 6 pu , the karlsson - hill model is suitable . when below , with air conditioner stalled , a new subsection model is established 先分析比较静态模型和动态模型，通过辨识的误差、动态程度d以及响应曲线分析，发现采用动态模型更为合适； u 0 . 6u _ n时采用karlsson - hill模型； u 0 . 6u _ n时空调停机，构造一分段的模型，结果表明该负荷模型可以很好的拟合空调的动态响应。
