双曲线

Using two hyperbolas the system can obtain 2D target position, while using at minimum three hyperboloids the system can achieve full 3D target locating.

使用二个双曲线系统能获得2D目标位置，当使用最少三个双曲面系统能达成完整的3D立体目标定位。

Using two hyperbolas the system can obtain 2D target position, while using at minimum three hyperboloids the system can achieve full 3D target locating.

使用二个双曲线系统能获得2D目标位置，当使用最少三个双曲面系统能实现完整的3D立体目标定位。

Does such 定点 also exist in parabolas, eclipses, and hyperbolas?

是否在抛物线、椭圆、双曲线同样也存在这样的定点？

Open curves such as parabolas, hyperbolas, and spiral s have infinite length

拋物线、双曲线、螺线属于开放曲线，其长度无限

Based on the "Time Difference of Arrival Principle", the system locates the source of signal position in two or three dimensions by solving for the mathematical intersection of multiple hyperbolas based on the Time Difference Of Arrival between the signal reception at multiple sensors.

基于&抵达时差原则&，系统在两或三维定位信号源位置通过基于在多传感器信号接收之间&信号差异到达&的数学上多重双曲线交叉来解决。

Open curves such as parabolas, hyperbolas, and spirals have infinite length

拋物线、双曲线、螺线属于开放曲线，其长度无限

Methods According to the document of ISO/TC172/GW1 N80 about the test principle and the experimental demands of times-diffraction-imit factor M^2, beam diameters in different z places along the light direction were measured using LBA-300PC laser beam quality analyzing meter made in Spiricon Corporation of America. Hyperbolas were fitted utilizing the measured data.

根据ISO/TC172/SC9/WG1 N80文件对M^2因子的测量原理及要求，用美国Spiricon公司生产的LBA-300PC激光束分析仪，沿光传播方向在不同z位置，测出光束宽度，由测量数据进行双曲线拟合，确定束腰直径和远场发射角，计算M^2因子。

Under the effect of submerged permeable breakwater located in front of the seawall, this study is aimed to simulate the wave transformation between submerged breakwater and seawall. The model utilized is the controlling formula - parameter of the porous medium and introduced with the theory of nonlinear shoaling correction.

在海堤前设置透水潜堤影响作用下，本文以数值模拟潜堤与海堤间特性的变化，所采用模式的控制方程式为单层孔隙介质层参数之双曲线型缓坡方程式，并导入非线性浅化理论。

Based on a thorough analysis of the character and mechanism of city-retaining-wall structures, the design theories, construction technology, new wall types and development tendency are deeply discussed. Besides, the characteristics of various types of city retaining wall are discussed, and the usual methods for earth pressure calculation are summarized. For the anchored bar retaining wall, the anti-pulling bearing mechanism of anchored bar is first probed into, from which anti-pullforce computation method are obtained. Combined with quite a few engineering examples and spot tests, the advised design and calculation methods of anchored bar are verified. From the abundant spot measured date, an adjusted hyperbolic model is put forward to determine the anti-pullforce bearing capacity. Furthermore, a new type of H-like block retaining structure is advised with its working mechanism deeply discussed as well.

本文在综合分析目前常用城市挡土结构的特点及其受力特性等基础上，针对一般挡土墙设计理论、施工技术、新型结构以及未来的发展趋势进行了深入探讨，论述了城市挡土结构的特点，并对常用土压力理论进行了综述，介绍了城市挡土墙常见的类型，并介绍了常规的设计理论和方法；通过分析比较，优选出锚杆挡土结构和砌块式挡土结构，并从锚杆锚固原理出发，结合工程实践和大量现场试验、对锚杆的抗拔承载力进行了深入研究，提出了用调整双曲线模型法计算锚杆抗拔承载力的方法，对土压力计算方法进行了探讨，对其设计计算方法进行了研究。

On the basis of the measured displacements from the chamber of a check sluice in Zhujia Harbor, the total settlements obtained from the time settlement curve and hyperbolic matching method were compared. The relationship between displacement and foundation resistance was analyzed.

基于上海地区③土层上的一座无桩基础水闸——祝家港节制闸闸室的沉降资料，分别对沉降曲线本身、用双曲线配合法对地基土的最终沉降量进行预测及地基土沉降与地基反力的关系这3个方面进行了分析。

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。