查询词典 parabolic curve

Hydrostatic transmission is widely used in construction machine. The research of one of its hard cores, low speed high torque radial piston motor, is very important. To directly estimate the life of this kind of motor, and to design a orbit curve with the longest life at same condition, this paper gives theoretic research of the equal contact stress inner curve of radial piston motor. The research is divided into four parts:1 Taken all forces the piston endured into consideration when radial piston motor working, the force between roller and orbit is deduced.

静压传动技术在各类工程机械中得到广泛的应用，对作为其核心部件的径向柱塞式低速大扭矩液压马达的研究显得十分重要，为了能直接对这种马达进行寿命估计，并能在相同工况下求得寿命最长的轨道曲线，本文从设计等接触应力内曲线的角度对这类马达作探讨性的研究，主要从以下四个方面进行：(1)综合考虑径向柱塞式液压马达工作时的各种主要受力状况，对柱塞组件进行受力分析，并通过仿真分析影响轨道和滚动体间正压力的各个因素，得到正压力的简化表达式。

Profile modeling ; Curve ; Curved surface ; Motion orbit ; Outside curve

因此，有必要对靠模曲线与曲面轮廓线之间关系做以探讨。以仿形车削回转球面为例，讨

RESULTS: Fractal signature of the medial tibial plateau at baseline was predictive of medial knee JSN progression (area under the curve 0.75, of a receiver operating characteristic curve) but was not predictive of osteophyte formation or progression of JSN in the lateral compartment.

结果：内侧胫骨平台的基线分形特征可以预测膝内侧关节间隙缩窄的进展（接受者操作特征曲线下面积 0.75），但不能预测骨赘形成和外侧关节间隙缩窄的进展。

It has the curve warp alarm and signal output functions. The design is based on the acceptable products curve to compare and analyze the test data, so as to make automatic judging and processing.

具有曲线偏差报警及信号输出功能，本设计以合格产品的曲线为基准，对检测数据进行对比和分析，实现自动判定和处理功能。

The results showed that the diurnal changes of photosynthesis of S. chinensis in tile overstory took on "double-peak" curve with remarkable midday depression. The midday depression was mainly due to non-stomata1 limitations. On the contrary, the diurnal changes of photosynthesis of S. chinensis in the understory took on "one-peak" curve with low Pn. The maximal Pn was only half of that of S. chinensis in the overstory. The correlation analysis showed that the limiting factor for this low Pn might be light intensity (p=0.001). Compared with its accompanying plants, S. chinensis was in a disadvantaged status in the community with low photosynthetic capacity, water use efficiency, and the ratio of photosynthetic rate to respiration rate.

结果表明：夏蜡梅冠层的光合速率日进程呈"双峰"曲线，有明显的"午休"现象，经分析其"午休"的原因主要是由非气孔因素引起的；林下夏蜡梅则表现为"单峰"曲线，净光合速率较低，最大净光合速率不及冠层的1/2，相关分析结果表明其最重要的影响因子是光合有效辐射(p=0.001)；与其它伴生植物相比，夏蜡梅的日均光合速率、最大光合速率、水分利用效率和光合速率／呼吸速率都明显偏低，在群落竞争中处于不利地位。

Through studying the intersection of paraboloid of revolution and cylinder , the author concluded that the horizontal projection of the intersecting lines—, is the famous Four-order algebra curve-Perseus curve.

通过对回转抛物面与圆柱面相交的研究，得出交线的水平投影曲线——为四次代数曲线——Perseus座曲线的结论。

These functions can not only provide users the data information that they want to acquire, but also allow users use the operation such as parallel moving of curve and adjusting of curve, which can make users do comparison among datas of different well and have a clear cognition on datas.

这些功能不仅可以使用户能够查看到想要的数据信息，而且还允许用户使用诸如曲线平移、井位调整等进行变换的操作，使用户可以对不同井中的数据进行比较，从而使用户对数据有一个直观的认识。

This paper briefly introduces the area calculation problem of a block,the boundary of which includes the easement curve or its parallel curve .

该文论述了以缓和曲线平行线为边界的地块面积的计算特点，推出了缓和曲线或其平行线弓形面积的严密计算公式，讨论了已知缓和曲线平行线弧长或坐标值计算弓形面积的问题，给出了相应的算例。

The content curve of terrigenous clasts (grain-size 3~5μm) is parallel to the oxygen isotope curve and mainly controlled by sea level change, which can be used as an indirect index for sea-level changing.

粒度分析显示，3~5μm组分含量曲线的变化与氧同位素曲线基本平行，说明它主要受海平面升降变化控制，可作为海平面变化的间接指标。

Based on the arc length formulae of the parallel to the easement curve and its property, this paper gives the parameter equations of the parallel to the easement curve taking the arc length itself as variable.

基于缓和曲线平行线弧长公式及其性质，给出了缓和曲线平行线以其自身弧长为变量的参数方程。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。