查询词典 relative

We propose a model-calibrated K-L relative entropy minimization approach to using complete auxiliary information from survey data.

本文我们提出了使用调查数据中完全辅助信息的模型校正K-L相对熵最小化方法。

Based on the analysis of the mechanism of robot manipulators, a trajectory tracking controlling research model is first built up with ADAMS, and its mathematical model is formulated through the study of robot kinematics and dynamics. After the modeling errors are analyzed in practical robotic systems, a conception of centralized error is brought forward according to the theory of weighting functions. In the case of modeling errors' exist, the robotic uncertain model is derived by introducing an auxiliary control variable into inverse dynamic analysis. The control strategy of robust exponential convergence is applied to the robotic uncertain model, the applicable conditions and the applicable controller with this application are presented. The stable control effect under three main model uncertainties (parametric errors, joint disturbs, joint frictions) are systematically studied on the previously built research model. The problems of robust exponential convergence controller which often results in unstable output and so produces a large relative error when the input trajectory is in a small range are resolved by adjusting the control parameters based on the controller's structure.

本文在机械手的机械结构分析基础上，利用ADAMS建立了用于机械手轨线跟踪控制研究的机械手模型；通过对机器人运动学和动力学问题的研究，建立了机械手研究的数学模型；分析了机器人系统中模型误差的主要来源，根据加权函数法分析，提出了模型集中误差的概念；在存有模型误差的情况下，采用逆动力学结构并引入辅助控制量，由机器人误差模型推导了机器人非确定性模型；提出了采用鲁棒指数收敛法对上述机器人非确定性模型进行鲁棒镇定的控制策略，并给出了对机器人进行鲁棒指数收敛控制时系统不确定因素应满足的匹配条件；针对机械手研究模型，深入研究了鲁棒指数收敛控制器对机器人系统中常见的模型参数误差、关节扰动、关节摩擦等不确定因素的镇定控制效果；针对鲁棒指数收敛控制器易产生控制量振荡的问题以及在小范围内系统轨线跟踪的稳态误差过大问题，本文分别提出了基于控制器结构的控制参数调整法和基于轨线跟踪范围大小的控制参数分段切换法。

By simplifying the motorcycle's entity structure model and using the iterative data of a road simulator as the road simulation actuator,it calculates and analyzes values of acceleration's average square root for motorcycles,then evaluates their comfort ability by the relative standards.

方法是将摩托车实体结构模型进行简化，加入道路模拟的迭代数据作为模拟路况的激励，在ADAMS/PostProcessor的界面上进行加速度均方根值的计算和分析，采用相关评价标准对其舒适性进行分析评价。

The average relative deviation is less than 5%.

工业结晶一般以真实物料为研究对象。

Such an experimental measured values of a specific statistical average relative deviation from the phenomenon known as the fluctuation.

这种某一次具体实验测量值相对统计平均值偏离的现象，称为涨落。

The effect of different discharge electrodes and settings on the experiment results is discussed in terms of average current density and relative deviation.

采用实验和数值计算相结合的方法，以极板表面平均电流密度、电流密度相对标准差为指标对电场性能进行了评价和预测，给出了几种电场性能较好的电极配置形式和几何参数调整范围。

By comparing the results with the SPAS-G calculation, the average relative deviation is 2.24%, and this indicates that both the net construction and the characteristic spectrum simulation are successful.

结果显示，两者的平均相对偏差绝对值为2.24%，表明网络的构造及特征能谱的模拟是成功的。

Experimentation shows that the average relative error of the model is 8.38%.

实验表明，模型的预测平均误差为8.38%。

The result shows that the average relative error is just 1.70%.

结果表明，组合预测的相对误差仅为1.70％，高于两种方法单独预测时的精度。

The average relative error between calculated value and test result was 3.09%,which could meet the requirements of engineering calculation.

计算值与试验值的平均相对误差为3.09%，可以较好地满足工程计算的需要。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。