逼近

Cycloid cluster is a new concept presented in this paper, which is a set ofcycloids. To process the back-angle accurately and efficiently, the parameters ofcycloid are adjusted to make the envelope curve of cycloid approximate involute .

使用摆线簇包络线逼近渐开线是本文提出的一种新方法，摆线簇就是一组摆线，通过调整摆线簇中每条摆线的参数，可以使摆线簇中摆线包络线高精度的逼近渐开线，进而实现倒锥的加工。

Obstruents—stops and fricatives----classified as voicedare voiced through only a small part of the articulation when they occur at the end of an utterance or before a voiceless sound.2,so-called voiced stops and affricates/b,d/are voiceless when syllable initial,except when immediately preceded by a voiced sound 3,the approximants/w,r/are at least partially voiceless when they occur after initial /p,k/This is due to the overlapping of the gesture required for aspiration with the voicing gesture required for the approximant.

1 ， Obstruents站和fricatives ----列为表达的通过表示只有一小部分的衔接当他们出现在年底的话语或之前清音。 2 ，所谓表示停止与affricates / B辑，数/音节时有发言权的初始，除非立即之前表示无害 3 ，逼近/ w中，俄/至少部分是无声这种情况发生时经初步/磷，钾/这是由于重叠的手势所需的愿望与呼声姿态所需逼近。

As an updated multiscale geometric analysis tool, second generation Bandelets provide an optimal representation adaptively by multiresolution analysis and geometric directional analysis. In its realization, the search of optimal geometry directions that are as parallel to real geometries as possible is a critical step, which decides the performance and runtime of whole algorithm.

第二代Bandelets是一种新的多尺度几何分析工具，借助多尺度分析和几何方向分析自适应达到信号的渐进最优逼近，实现过程中最优逼近几何方向的寻找决定了整个算法的运行时间和性能。

We give all of these properties by means of theorems, and also give detail proofs. In the most important theorem, we give the relation between singularity and jumps and sharp cusps neighborhood. and the threshold detection of jumps and sharp cusps, and the relation between threshold and scales, where we partly resolve an open problem put forward by some researcher.

在最关键的定理中，给出了奇异性与突变点和尖点的领域的关系，以及突变点和尖点的阀值检测法，以及阀值和尺度的关系，这部分的解决了以前研究者提出的一个公开问题，同时研究了逼近程度和逼近理论，这在已有的基础上又向前进了一步。

According to threat object,engagement mode, etc, then it's main performance of tactical application is discussed, and the practicability, validity and improvement of UV MAWS based on it's capability for high speed fixed-wing fighter are analysed.

从介绍导弹逼近告警的军事需求和应用背景入手，根据威胁对象、平台交战模式的特点，确立了系统的战术任务定位，系统阐述了导弹逼近告警战术应用的主要性能，并在分析紫外告警性能功能基础上，论述了紫外告警在高速固定翼飞机应用的实用性和有效性及今后的发展。

This paper integrates linear affine transformation and nonlinear affine transforma-tion"s approach ability. Integrated affine transformation not only inherits the linear affine transformation"s low bit rate merit,but also inherits the nonlinear affine transformations approach ability.The method proposed in this paper is a new method, and never be proposed in other papers.

本硕士论文综合了线性仿射变换和非线性仿射变换的逼近能力，采用混合型的仿射变换既能发扬线性仿射变换的低比特率的优点，又能发扬非线性仿射变换的相似逼近能力，提高重建质量，本算法是一种新型的算法，文献中尚未提及。

The sightline control strategy for bad measure precision is developed, and the control methods for vertical direction, approach direction and station keeping are presented.(2)The safe approach velocities are investigated for cuboid, sphere and cone keep out zone.(3)The design method for optimal trajectory under safety constraint is developed. The cone and cuboid keep out zone can be described using line constraint, and then optimal trajectory design can be translated to line programming problem under line constraint.(4) The design strategy of collision avoidance maneuver is discussed, and the collision avoidance scheme is analyzed for V-bar and R-bar approach.The control and trajectory safety in departure phase are investigated.

1提出了测量误差较大时平移靠拢段的视线控制策略，给出了横向、纵向和悬停的控制方法；(2)针对长方体禁区、球形禁区和锥形禁区三种禁区形式，研究了V-bar逼近和任意方向逼近的纵向安全速度计算问题；(3)提出了安全约束下的最优轨迹设计方法，将冲量和有限推力作用下的最优轨迹设计问题转化为线性规划问题，并给出了将锥形和方形安全区域约束转化为标准线性约束的公式；(4)探讨了紧急避撞机动的设计策略，分析了V-bar和R-bar接近的紧急避撞机动方案。

A smooth approximation algorithm is then proposed based on hinge-finding algorithm via curved faces approximated to the hinging hyperplanes model, which can obtain a smooth approximation result and hold some good properties of hinge-finding algorithm such as simplicity and effectiveness.

本文对找链接算法做了两点改进，其一是扩充了链接超平面模型，在二维空间上弥补了链接超平面模型表示能力不足这一弱点。仿真实验显示使用扩充后的模型得到了更好的分片线性逼近结果。另一点改进是使用双曲光滑函数构造出了基于找链接算法的光滑逼近算法。理论分析证明了算法的可行性。仿真实验验证了理论分析。

The study of direct and inverse theorems on the approximation of linear operators to functions in normed linear spaces is an important subject in the approximation theory.

线性算子对赋范线性空间中函数逼近正逆定理的研究是逼近论中重要的研究课题之一，在理论和实际应用上都具有重要的意义。

Two examples are given to show the effectiveness of these two methods, and the results are compared with Legendre approximation.

最后通过2个实例验证了这2种逼近方法，并与Legendre逼近方法进行了比较。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。