圆柱

While the plane is measured by using the cylindricity measuring instrument and square ,the data acquisition should be done at the same time.

首先利用圆柱度仪和角尺对被测件进行测量，同时采集原始测量数据，然后利用最小二乘法实现平面度误差的评定。

Roundness and cylindricity are two of the most widely used tolerances, because most of workpieces contain round or cylindrical fraction.

然而，到目前为止圆度和圆柱度的评定仍然没有既符合标准定义又具有快速简洁特性的计算方法。

Aiming at researching on the theory of the shaft-kind parts form error evaluation and its application, on the basis of the analysis for the geometric model of the roundness error and cylindricity error, the linear programming models of the enclosure evaluation were proposed. According to the features of the proposed models, the solution of the optimization algorithms of linear planning was discussed to obtain accurate evaluation results.

为了对轴类零件形状误差评定理论及应用进行研究，在分析轴类零件的圆度、圆柱度误差评定几何模型的基础上，建立了包容拟合评定的规划数学模型，并针对模型的特点，探讨了使用线形规划的单纯形优化算法进行规划模型的求解，从而获得精确的形状误差评定结果。

The honed cross hatch in cylinder bore of engine and the cylindricity of cylinder bore shall affect directly the operating mode and life of engine.

发动机缸孔平台网纹珩磨得是否合理和缸孔圆柱度的优劣直接影响到发动机的工况和寿命。

The roundness and cylindricity on-line measurement system for ultra-precision machining, as well as the corresponding measurement software has been developed, which can perform the on-line measurement for the workpiece at any time.

研制了超精密车削工件圆度及圆柱度临床测试系统，及相应的测量软件包，可随时对工件进行临床测试。

The cylindricity could be calculated by least squares method and wavelet error separation method that the measurement error could be decomposed by Harmonic analysis algorithm based on wavelet theory.

针对激光 CCD 灵敏度高，干扰噪声容易混入测量数据中的问题，提出了一种基于小波分析的误差分离方法，即运用谐波分析的思想方法和小波理论中多频率分析算法进行误差分离，误差分离后的数据用最小二乘法处理求出圆柱度。

The generalized criterion for minimum zone in the determination of form error of surface is presented on the basis of linear minimax techniques, and the criteria of such surfaces as for cylindricity and straightness with arbitrary direction are derived from this generalized criterion.

本文讨论形状误差最小区城的判别准则和判别方法。根据线性极差极小化问题解的特征，给出形状误差最小条件的统一判别准则。推导出各种形状误差最小区域判别法(包括圆柱度误差和任意方向直线度误差)，并在几何判别的基础上得出代数判别的格式。

Selecting a correct honing method and pressing plate process can obtain a good oil－storage surface in cylinder bore and guarantee the bore cylindricity under the engine operating status,this r...

选择合适的珩磨方法和压板工艺，使缸孔具有较好的贮油性表面，并保证缸孔在发动机运转状态下的圆柱度，这不仅降低了缸内的机油上窜，使废气中的颗粒含量减少，而且也使缸壁具有良好的抗磨性能。

Taking a example for verilying the feasibility and computation precision of the approach,the computation results show that the PSO-based approach is a useful tool for solving such nonlinear optimization problems as cylindricity evaluation with complicated goal function and more parameters. It is superior to that given by the Least Square Method and a little better than or equal to those given by GA-based method and another Minimum Zone Method.

计算结果表明，该方法对于圆柱度误差评定这类具有复杂目标函数和较多参数的非线性优化问题有很好的计算性能，优于最小二乘法；与遗传算法和其它满足最小区域条件计算方法相比，计算精度略优于前者或者与前者相当，能够获得精度较高的结果，而突出优点是简单，易于实现而且计算效率较高。

It can process the material quality including copper,aluminum, iron, stainless steel, revertex, magnet etc, and can procell products' cylindricity and the surface roughness achieve 0.4μm below.

铁、不锈钢、塑胶、磁铁等；加工产品的圆柱度及表面粗糙度可达到0.4μm。希来图来样加工。我公司将以最低的价格，最优的质量。

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。