查询词典 parameter

The PID parameter tuning of non-linear control system is set as the engineering background. The aim is the optimal design of PID parameter. On the basis of the design and research of the advanced PID parameter tuning, the mathematical model-transfer functionis developed through correlation analysis on statistical method.And with the optimization algorithm under constraint condition, the non-linear, Isqnonlin is set as object function. Then with connection of the non-linear constrain optimization algorithm and simulink technique, a set of adjust parameters which fit the performance index of the control system are found. And optimization design process and steps are provided.

本文以非线性控制系统PID参数整定为工程背景，以PID参数的优化设计为目标，在分析和研究国内外PID参数先进整定方法的基础上，运用相关分析实验统计方法建立对象的数学模型——传递函数，把PID参数设计问题转化为一种非线性优化设计问题，借助于约束条件下的优化算法，以非线性最小平方指标为目标函数，将非线性约束优化算法同Simulink仿真技术相结合，找出符合控制系统品质指标的一组调节参数。

According to the lack of the original reliability parameter and the necessity of exploiting original reliability parameter small stylebook,a linear combination forecasting model of original reliability parameter of power systems is proposed.

针对电力系统可靠性原始参数缺乏和开发可靠性原始参数小样本的需要，提出了电力系统可靠性原始参数的线性组合预测模型。

The experimental plot situated at the middle of Sichuan Basin, the peculiar resource of purple soil and subtropic climate make it become the principal part of Sichuan agriculture.This paper,using Soil Conservation Service Curve Number method,calculated the volume of rainfall runoff in 2005, through calibrating the parameter Ia and parameter CN. it can received the suitable range of parameter, and the arverage error are respectively 6.46%,10.22% and 8.40%. It also show the feasibility that the application of SCS model to estimate the volume of rainfall runoff in sloping field of purple soil

此次试验地位于四川盆地中部，独特的紫色土资源与亚热带气候的最佳组合成为四川农业的主体区域，运用SCS模型计算试验小区在2005年的三场降雨产生的径流量，通过校正Ia和CN参数，小区计算值和实测值的误差分别为6.46%，10.22%和8.40%，得到了可信度较高的结果，同时说明了SCS模型在估算紫色土流域径流量的可行性。

Estimations of effective parameter in heterogeneous media: Firstly, we clarify the concept of the effective parameter and address the problems of parameter estimation by traditional pumping test. Secondly, we present two estimation approaches (i.e., distance-drawdown and spatial moment analyses) for Seff and Teff, which are consistent with Theis' homogeneous aquifer assumption.

本文探讨的内容主要分两大部分：(1)空间异质性孔隙介质有效参数的推估方法：主要探讨内容包括重新思考有效参数的定义及其观念，探讨传统抽水试验推估异质性含水层有效参数的一些问题，其次提出估计异质性地下水系统有效参数两个合理方法：泄降-距离曲线分析和泄降分布的空间矩分析，并以数值实例解释其合理性，文中藉由分析数值模拟的结果探讨说明该问题。

This paper researches the improvement of the vector of unknown parameter α and the vector of random-effect parameter β, including GLSE and LSE in some conditions, discusses the relevant properties of parameter's estimation, and explains the thought of using its unbiased estimator replaced when the variance is unknown.

本文研究了未知参数向量a和随机系数β的参数估计的改进，包括在一定条件下的GLSE和LSE，并讨论了参数估计的有关性质及说明了在方差未知时，用其无偏估计代替的思想。

Motibity changed by gear-box in direction and rotate speed is transferred to the blade axis on the right side to drive the blade axis. blade axis'parameter, blade assembling frame and blade assembling means are ascertained. The load and movement of the blade axis are analyzed. And the best blade rotate speed is ascertained. According to the request of no-tillage soil, the appropriate furrow openers are chosen. They are staggered and assembled in two rows .According to the sliding cutting request, the crucial parts of the anti-blocking——the sliding cutting blade, its edge curve is analyzed and designed in principle. The academic curve function is gotten. Combined with working practice and technics request, the blade's figuration parameter is designed, 65Mn is chosen as the material for blades. The working load is analyzed. And the intension of the sliding cutting is analyzed and checked with ANSYS software. At last, the spring rack of the suppress wheal is analyzed in principle. The theory and parameter of designing the spring rack of the suppress wheal. Experiment indicated that the anti-blocking capability of this anti-blocking equipment was excellent.

设计出适合此防堵装置的动力传输方案，动力经变速箱变向变速后从右侧传给刀轴，驱使刀片切割秸秆；确定出了刀轴的参数、刀片的安装结构和安装方法，对刀轴的受力和运动进行了分析，确定出了刀轴最佳转速；根据免耕地的要求，选择恰当的开沟器，并采用双排错位安装的办法，避免了"瓶颈"现象的发生；根据滑切的要求对此防堵装置的关键部件——滑切刀片的刃口曲线进行了理论分析和设计，得到了刀刃的理论曲线方程；结合生产实践及工艺要求，设计出刀片的外形参数，选择65Mn作为刀片的材料；分析和计算了刀片在工作中承受的载荷，运用ANSYS 软件对滑切刀片的强度进行了分析校核；最后对镇压轮的弹簧支架结构进行了理论分析，提出了设计镇压轮弹簧支架的理论和参数依据。

According to fractal theory, R/S analysis on the typical colluvial landslides is complete, finding that the parameter of Hurst decreases just at the time before the landslide took place. This research result shows that Hurst parameter is an effective nonlinear displacement parameter and it also has a very explicit forecast function.

根据分形理论，运用时序分形分析法对堆积层滑坡的位移规律进行了R/S分析，发现了其位移Hurst指数在边坡整体失稳前，存在明显降维现象，证明了位移Hurst指数是边坡一种有效的位移非线性参数且具有明确的稳定性预报功能。

The paper emphatically and deeply studied how to design and realize the functions sub-modules of the configurationally monitoring, the sub-modules include safety management sub-module, process flow sub-module, flow measurement sub-module, alarm sub-module, cure sub-module, parameter setting sub-module, report sub-module. The configurationally monitoring module possesses perfect functions of dynamically monitoring the production process of operating area, dynamically displaying parameter records of flow, pressure as well as temperature, inquiring and analyzing parameter records, drawing tendency charts, data alarming, automatic generating and printing all kinds of report forms and safely managing system.

本文继续深入的对构成组态检测模块的七个子模块；系统安全管理模块、工艺流程模块、流量计量模块、报警模块、曲线图模块、参数设置模块、报表模块的设计开发展开了研究，实现了对作业区生产过程的动态显示，流量、压力、温度等参数的动态显示与历史查询、曲线的绘制、数据报警、各种工作报表的自动生成和打印及安全管理等功能。

That shear strength parameter is accessed according to quantitative index of granulometric composition is put forward in concrete gravity dam design criterion. By criterion, strength parameter may be acquired easily, however influencing factor of interlayer strength parameter is not all things consider.

混凝土重力坝设计规范》（DL5108-1999）中提出的以粒度成分定量指标评价软弱结构面强度参数，可以较方便地得到夹层的强度参数，但它没有综合考虑影响夹层强度的多种因素。

By simulating the EPR parameter D and the optical spectra, the distorted angles of two inequivalent sites which formed by Cr3+ replacing M3+ are determined and the obvious differences of the distorted angles calculated by using two spin orbit coupling parameter model and single spin orbit coupling parameter model are found.

通过模拟光谱和EPR谱确定了Cr3+取代 M3+形成的两种占位结构的畸变角，发现用双自旋轨道耦合系数模型与单自旋轨道耦合系数模型计算出的畸变角存在较大的差异。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。