双曲曲面，即通常所称的负曲率，因为它的表面同时向上和向下弯曲，就像一个马鞍。
The hyperbolic surface, which has so-called negative curvature because its surface curves up and down at the same time, like a saddle.
弯月面容器中之静止液体的弯曲上表面，如果液体浸润了容器壁，那么弯曲面呈凹状。
The curved upper surface of a nonturbulent liquid in a container that is concave if the liquid wets the container walls.
在这个例子里，圈饼表面就是非单连通的，并且这类物体的简化就会像是至少有一个洞的曲面。
In this example, the surface is not simply connected and any smoothed-out object looks like a torus with at least one hole.
在日常生活中，光是以直线的方式传播的，但是在复杂的曲面，光的传播被限制在表面附近。
LIGHT, which in everyday experience travels in straight beams, has been trapped on complex curved surfaces.
其强壮的四肢末端长着五个脚趾，趾尖是曲面爪子，赋予其在沙石表面优异的吸附能力。
Her powerful limbs ended in five-toed feet, tipped with curved claws providing excellent purchase on the sandstone surfaces.
试验结果表明，该算法可有效地提高自由曲面的加工效率和表面加工质量。
The experimental results show that the proposed algorithm can improve machining efficiency and surface quality.
弯月面容器中之静止液体的弯曲上表面，如果液体浸润了容器壁，那么弯曲面呈凹状；如果没有，就呈凸状。
The curved upper surface of a nonturbulent liquid in a container that is concave if the liquid wets the container walls and convex if it does not.
在复杂曲面数控加工中，刀位轨迹生成算法的优劣在一定程度上影响最终加工表面质量和加工效率。
Tool path generation is important for complex parts nc machining, and the methodology of tool path generation affects the efficiency and quality of parts machining.
按点-线-面的层次数据结构，选取几种有代表性的曲线曲面，实现了三维复杂外形的表面描述。
Based on a point line patch hierarchical data structure, three dimensional complex geometries are described by several typical kinds of surface patches.
其基本环节有：模型表面空间坐标数据测量、数据预处理、重构曲面模型、数字模型输出。
Its basic step includes: data measure of model surface, points pretreatment, reconstruction surface model, and the digital model export.
对圆柱正截面和量块表面的测量试验验证了该测量系统对自由曲面和金属强反射表面测量的可行性。
Through measuring cylindrical section and surface of gauge block, this system is viable to measure free-form surface and high-reflective metallic surface.
该方法通过二次曲面求管线表面轮廓方程进而求得管线的型值点集。
With this method, shape points were calculated by surface outline equation got from quadratic surface.
对基本船型的曲表面迭加曲面薄船函数以计算其对应的改良船型。
Appending curved surface thin ship function to the curved surface of basis ship, the corresponding improved ship form is calculated.
工具定位精度和工艺合理性规划是影响自由曲面表面高质量制造的主要因素。
Surface polishing is typically used for the quick fabrication of free-form surfaces. The continuous demand for better quality has led to demand in higher surface accuracy.
整个曲面屋顶被切割成无数阶梯，每一级阶梯上表面为花岗岩石材，侧面嵌植绿化条带。
All of the roof is cut into stairs which act as both stone stairs and green belt.
振动强化、抛光技术用于对复杂异型曲面工件进行表面强化、抛光处理。
Vibration strengthening and polishing techniques was applied to carrying out the treatment of surface strengthening and polishing for work piece with special complicated shaped surfaces.
分析了裤衩型钢煤斗外形的几何特点，建立了裤衩型钢煤斗漏斗表面的数学模型，分析了曲面展开的算法。
This paper analyzes the geometric features of the trousers type steel scuttle, sets up the mathematics model of the funnel surface of this scuttle.
采用平行铣削对曲面进行数控加工时，行距对工件的表面粗糙度有一定的影响。
The parallel milling is adopted to curved surface NC machining. The row spacing has an effect on surface roughness of workpiece.
采用曲面的表面法矢建立了毛坯的几何模型，结合扫描体代数方程，实现了加工仿真和NC代码验证算法。
Surface normal vector technique is used to setup geometry models for blanks. Combined it with s AE, we implement algorithm for NC machining simulation and Verification.
因此，在地球表面上或附近测量距离并不是沿着直线或平面进行，而是在一个曲面上。
Therefore, distances measured on or near the surface of the earth are not along straight lines or planes, but on a curved surface.
本文详细讨论了既有线表面曲面模型的数据特点、数据点分布，以及曲面模型上定义的计算等问题。
In this paper, characteristics and distribution of surface data and computation defined on these curve surfaces are discussed in detail.
根据啮合基本定理提出的复杂曲面加工表面几何仿真算法是对几何仿真新的探索，具有较强的实际意义。
Algorithm of geometry simulation in machining complex curve surface depending on engagement theory is the new exploration for geometry simulation, it has better practical meaning.
振动强化、抛光技术用于对复杂异型曲面工件进行表面强化、抛光处理。
Vibration technology is used to strengthen and polish workpieces with complicated strange curved surfaces.
介绍了采用碳化铬硬质合金制作质谱计和表面分析仪器中的双曲面玻璃管的成形模具。
The present paper has described the die made by chromium car - bide for forming mass spectrometer needle and double curved surface glass tube in surface analyzing instrument.
首先将矩形光栅投影在被测表面上，利用光栅投影法测量自由曲面上每点高度信息。
First, grating is projected on measured free surface, and height data of each point on free surface is measured by the grating projection method.
由于混合曲面的造型方法在模具表面的造型中广泛采用，从而使混合曲面的造型方法在汽车覆盖件表面造型中占有很重要的地位。
As styling method of compound curved surface has been widely used in die surface styling, it possesses a very important position in surface styling of motor vehicle body cover panels.
研究结果表明，法向压力在模型铲刀表面呈二次曲面分布，在模型铲刀的中部取得最大值。
The experimental result shows that the normal pressure distribution on the surface of the model blade is a conicoid, the maximum of the normal pressure is in the middle of the model blade.
利用保角变换，首先在二维平面得到双曲线型的等位线簇方程，然后过渡到三维空间，从而得到表面为单叶双曲面（两实半轴相等）的带电导体的等位面簇方程。
Transition to the three-dimensional space, then we obtain the equation of equipotential surface families of charged conductor with surface of hyperboloid of one sheet.
得到三维物体表面的曲面表示是反向工程的主要目的。
The one of main goals of Reverse Engineering is to get the representation of smooth surface of object.
得到三维物体表面的曲面表示是反向工程的主要目的。
The one of main goals of Reverse Engineering is to get the representation of smooth surface of object.
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