提出误差集聚法,可建立多误差因素共同作用下的切削加工数学模型,使之纳入机床加工过程的几何与物理误差。
A synthesizing method is developed to establish a mathematical model for describing the machining tolerance which synthesizes bo th the geometric and physical tolerance.
差不多,就是这么多,因此必须允许这么大的误差。
You will see that that is about this much higher than this so we must allow for this error.
改进后的未来时钟准确度将提高到320亿年一秒的误差——高出宇宙年龄的两倍多。
Future clocks that use the new improvements would be accurate to a second every 32 billion years — more than twice the age of the universe.
GPS接收机的误差受多种因素影响,多径干扰便是其中一项。
The GPS error is influenced by a lot of factors, one of them is multipath effect.
对所有多聚体分子间相互作用能的计算,进行基组叠加误差(BSSE)和零点能(ZPE)校正都是必要的。
The basis set superposition error (BSSE) and zero point energies (ZPE) corrections are absolutely necessary for the interaction energies of the clusters.
从提高自由曲面数控加工精度入手,对多轴数控加工的误差进行了分析,并提出了较为合理的走刀步长的估算方法。
In order to improve the precision of freeform surface, the error of multi-axis NC machining is analyzed and a more reasonable estimate for tool step is given.
由于交叉耦合控制利于多轮驱动之间的制约和协调,可以有效减少方向误差和提高路径跟踪的精确性。
Because cross-coupling control is advantageous to restricting and harmonizing between multi driving wheels, it can reduce orientation error and improve the accuracy of path tracking effectively.
设雷达网中某一部雷达无系统偏移误差,将其多雷达组对于该雷达进行相对配准。
One of the netted radars is assumed to have no system bias errors, the relative bias error registration are implemented for other radars.
本文将最小误差激励(mee)法推广应用于多机电力系统分散输出反馈控制器的设计。
This paper proposes the application of extended minimum error excitation (MEE) method to designing decentralized output feedback controllers for multi-machine power systems.
给出了在雷达低仰角跟踪测量中由于多径效应影响而引起的雷达仰角、方位角、速度、距离误差的估算模型。
In this paper the error models of Angle, range and speed due to multipath effect in low Angle radar tracking are given.
目的通过估计误差方差阵,对多传感器组合导航系统中不同的融合数据进行定位精度比较,为系统定位提供选择数据的依据。
Aim Using the variance matrix of estimated error, positional accuracy can be compared with different mixing together data, it has put forward a kind of basis for system location to select data.
采用多帧图像的叠加显示和误差扩散方法,很好地解决图像灰度级不足的问题,从而提高荫罩式等离子体显示器的图像质量。
To solve the problem of the poor gray level of SMPDP, the multi-frame combination and error diffusion methods are used. The image quality is improved greatly.
介绍了一种对多齿细分分度台综合示值误差进行检定的简便方法,并进行了测量不确定度评定。
A valid verifying method of error of indication is introduced for subdivide multi-tooth table in this paper. The evaluation of uncertainty of measurement is given.
通过加入环境节点约束方程对多显著误差的同步识别并同步补偿法(SEGE)进行改进研究。
The simultaneous estimation of gross errors (SEGE) is modified by adding environment node constraint to improve the detection performance.
经过实例检验,改进的模拟退火-灰色模型的相对误差比传统灰色模型小的多,提高了预测精度。
It is testified by instance that the relative error of stimulated annealing grey model is smaller than traditional grey model's and it has improved the prediction precision.
介绍了微机控制的阶梯轴多参数在线测量系统的测量原理、系统构成及测量误差分析。
The measuring principle, system composition and measuring error analysis of the computer controlled step shaft multi parameters on line measuring system are introduced.
最后以测杆弯曲的修正为例,对多坐标测量机的系统误差修正作了初步探讨。
Talking the modification of measuring bar bend as an example the author discussed the system error modification of the multi-coordinator measurers.
对多信道模型的输出应用线性预测,证明了预测误差只包含多信道模型冲激响应在第一个时隙的参数,并给出最佳线性预测器的长度。
A linear prediction approach is applied to the output of this SIMO model and we prove that the prediction error contains the parameters of the first time slot of the model impulse response.
分析了布极方式对稳态接地电阻测量带来的测量误差,提出了多电极法的新型布极方式。
This paper present a new electrode arrangement by analyzing errors in grounding resistance measurement under steady voltage.
应用多传感器信息融合技术,降低了测量误差。
The application of information blending technique with many sensors decreases the error of measuring.
通过对多径信号的平均能有效地减小量化误差。
Quantization errors can be effectively reduced by means of a multipath averaging procedure.
提出的过零点检测算法,较好解决了脉搏信号时域特征点参数多,分析复杂,误差较大的问题。
The algorithm of measuring zero-crossings can better solve the problems that the characteristic parameters of the pulse signal are complicated in the time field and the measuration errors are greater.
采用非接触光电式测量方法,设计了多工位数控刀架误差测量系统。
An error measuring system for multi-location numerical control cutter holder was developed by adopted non-contact photoelectric measuring method.
传统气相色谱法检测油中溶解气体存在分析环节多、操作频繁、试验周期长、误差大等弊病。
The traditional gas chromatography for testing dissolved gas in transformer oil has the disadvantage of multiple analytic links, frequent operation, long testing cycle and large errors.
针对单个BP神经网络作为预测模型时,递推多步预测误差积累大的缺点,本文提出多BP神经网络并行预测控制算法。
As the recursive error is accumulated largely when the single BP network is regarded as predictive model, we propose the paratactic predictive control algorithm based on multi-BP networks.
讨论了减小动态误差、多通道协调加载、数字化参数设置和控制、自动加载、多机通讯等技术的实现方法。
The method to decrease dynamic error, load coordinately and automatically, digitize in control, communicate with other computer is discussed.
还开发了多帧匹配时的倒匹配方法,减少了多帧匹配的累积误差。
A backward registration method was proposed to reduce the accumulation error of registration of multiple depth pictures.
GPS测量,尤其是差分GPS测量,多径信号是主要的误差来源,会引起定位精确度的恶化。
The major error source of GPS systems, especially of differential GPS, is the multipath signals. It will deteriorate the precision of positioning.
GPS测量,尤其是差分GPS测量,多径信号是主要的误差来源,会引起定位精确度的恶化。
The major error source of GPS systems, especially of differential GPS, is the multipath signals. It will deteriorate the precision of positioning.
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