查询词典 concave curve

Analyses show that the theoretical form of camber curve should be a parabolic curve of 4 degree with horizontal tangents at both beam ends, while the common crane building praxis uses a parabola of 2 degree.

分析结果指出，合理的预拱曲线应当是两端具有水乎切线的四次抛物线，而不是通常采用的二次抛物线。

By analyzing and solving the exterior ballistic equations of shots, the paper gives a method for computing the parabolic trajectory,flying velocity curve and rudimental energy curve of shots.

本文通过分析与求解霰弹子外弹道运动方程，给出计算圆球形霰弹子抛物运动弹道曲线、速度衰减曲线及残留能量曲线的方法。

On the ship body, the parabolic curve panels are adopted to discretize the surface in order to improve the continuity and the linearly variable sources are distributed on panels. The solid boundary condition is satisfied rigidly on the curve panel.

在船体上，本文采用了二阶抛物面单元离散船休表面，以改善用平面单元离散时出现的不连续，并在单元上布置强度呈线性分布的源汇，固面条件在曲面单元上严格满足。

Based on the structure of a non-tracking internal-concentrator solar PV-thermal tube collector and the absorber design requirements, the optical design for the compound parabolic concentrator with half cylinder absorber is proposed to improve the solar energy efficiency. Matlab software was used for the optimization and simulation of the concentrator curve and shape. The curve equation of concentrator for maximum incidence of light of the collector was obtained; and the installation locations for CPC/half cylinder absorber and the necessary CNC processing parameters were optimized.

针对非跟踪内聚光光电－光热复合管的结构及接收器的设计需求，对管内具有特殊形状的半圆柱接收器的复合抛物面聚光器进行了光学设计，并利用Matlab软件对聚光器曲线和形状进行了优化与数据仿真，得到了光热复合管能够得到最大入射光的聚光器的曲线方程、安装位置以及供数控机床加工所需的参数，给出了不同入射角的光线和光强分布图，提高了太阳能的利用率。

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。

A sandwich ELISA was established taking the antiserum as the primary antibody. The sensitivity of the ELISA was 0.412 ng GH/ml of sample. Inter-assay and intro-assay coefficients of variation were 2. 58％(n=6) and 5. 69％(n=6) respectively. Serial dilutions of serum and pituitary homogenate from orange-spotted grouper yielded dose response curves that were parallel to the standard curve. And the GH of Acanthopagrus butcheri was also parallel to the standard curve. Prolactin of goldfish and recombinant growth hormone of common carp showed no cross-reactivity with the antiserum of orange-spotted grouper GH. It showed that the established RIA was specific and sensitive.

以斜带石斑鱼重组GH抗血清为第一抗体，羊抗兔抗体为第二抗体建立了双抗体夹心酶联免疫测定法，该系统的灵敏度为0.412ng GH／ml(n=6)，组内变异系数为2.58％(n=6)，组间变异系数为5.69％(n=6)，斜带石斑鱼血清和脑垂体稀释液曲线与斜带石斑鱼重组GH蛋白的标准曲线相平行、黑棘鲷GH的系列稀释曲线与标准曲线相平行，金鱼催乳素、重组鲤鱼GH的系列稀释曲线与标准曲线不平行，表明建立的斜带石斑鱼GH ELISA具有良好的特异性和重复性，灵敏度达到了测试血清样品中GH的水平。

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。