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The details as follow: 1.Based on rules about form error in GB, mathematical models of form error are established including straightness error on the base of minimizing zone method、least-squares method and two dots linked method ; flatness error based on minimizing zone method、lease-squares method、diagonal line and three dots method; circularity and cylindricity error based on minimizing zone method、lease-squares method、minimum circumscribed circle and maximum inscribed circle.

具体内容如下:根据国标中形状误差的相关规定建立了各种要素评定方法的数学模型包括:直线度的最小区域法、最小二乘法、两端点连线法;平面度的最小二乘法、最小区域法、对角线法、三远点法;圆度和圆柱度的最小区域法、最小二乘法、最小外接圆法、最大内切圆法。

In the roof reconstruction, a TIN-based region growing is applied to extract the roof planes. The coplanarity and adjacency between triangles are considered for TIN-based region growing. Then, a least squares regression is selected to determine the coplanarity function of planar segment.

在建物屋顶面重建中,使用建物轮廓线内部的光达点云进行屋顶面之共面分析,研究中使用三角网区域成长法侦测共平面之屋顶面,以相邻三角网法向量夹角做为共平面门槛,并以最小二乘法回归出屋顶面之平面,产生房屋模型。

First of all, studies the structural characteristic of the controllable region by means of the support hyperplane of the.convex set,then the synthesis problem of minimum step and minimum energy control sc.quence ...

利用凸集的支撑超平面等方法首先研究了能控域的结构特性,然后定义控制能量受限下的最小拍最小能量控制序列的综合问题。最后还给出了求解最小拍最小能量控制综合序列的计算方法。

In a comprehensive study of various macro-and micro-heterogeneous reservoir parameters on the basis of the reservoir quality, we launched a comprehensive evaluation to determine the evaluation criteria. The reservoir quality in 2+3 was divided into three types. The research shows that distribution of interlay and insulating layer is controlled by sedimentary microfacies. The developmental stages and the size of the sedimentary microfacies determine the plane and the vertical distribution of interlay and insulating layer.

本研究运用高分辨率层序地层学的原理和方法,从油田生产的实际需要开发,将双河油田Ⅶ下单元的14个小层,重新划分为31个;在综合研究各种储层宏观和微观非均质性参数对储层质量影响的基础上,开展了储层多参数综合评价,对Ⅶ下单元的隔夹层进行研究,绘制了各小层的平面分布图,并对Ⅶ下单元的31个活动单元划分为4种类型,在平面上画出了所有小层的评价图。

Planar point set the minimum inclusive circle, that circle with a minimum point of the plane are all incorporated.

详细说明:平面点集的最小包容圆,即用一个最小的圆把平面内所有的点都包容在内。

Sort-and-Incremental Algorithm Step 3: Starting from two h-planes with the least polar angle, compute their intersection.

从排序后极角最小两个从排序后极角最小两个半平面开始,半平面开始,求出它们的交点并且将他们押入栈。

Finally, the programme of design for routing protocols is chose in the thesis. Secondly, improved algorithms are introduced in detail. In order to achieve to reduce duplication of data sent in, save energy, prolong the network lifetime and balance the network load, improved algorithms are based on the minimum hops algorithm which is one of the energy-aware routing, When the characters of the minimum hops algorithm are analysed in detail,multi-path routing, adaptive dynamic routing, routing reliability are designed.Then a new algorithm based on minimum hops in plane routing protocol and a new algorithm based on minimum hops in clustering routing protocol are designed in the thesis.

接著详细介绍了本文的改进路由算法,为实现减少数据的重复发送量、节约能量、延长网络寿命、平衡网络负载的目标,本文以能量感知路由之一的最小跳数算法为基础,详细分析了最小跳数算法的特点,设计了多路径修正路由,自适应动态路由,路由可靠性机制三方面的改进方案,并且结合改进方案设计了基于最小跳数的改进平面路由协议和基于最小跳数的改进分簇路由协议,将两种类型算法的优点相结合,提高网络的健壮性与可扩展性。

The specimen horizontally into two of the instrument, sample between the edge of the circular underpan between the minimum distance of not less than 50-mm, measurement should be gently 2 ~ 3 mm/min will activities on blank sample in order to avoid any impact, and make sure the piece and thickness measurement plane parallel.

将试样水平地放入仪器的两个平面之间,试样的边缘与圆形底盘边缘之间的最小距离不小于50mm,测量时应轻轻地以2~3mm/min的速度将活动平面压在试样上,以避免产生任何冲击作用,并保证试片与厚度仪测量平面的平行。

Cylinder, the cylinder sets of radial a surplus deformation of the cylinder sets a great impact on the cylinder liner reduced radial a surplus amount to reduce the deformation of the cylinder sets, the top surface of the body decreases roughness, but it will increase the body on the plane cylinder only mouth the roughness ; Preload reduced cylinder head bolt deformation of the cylinder liner little effect, the body can reduce the top surface roughness and cylinder body on the plane I ended roughness; Shen appropriate reduced cylinder head bolt hole deep can reduce the deformation of the cylinder sets, but will cause the body and the top surface roughness on the cylinder body only I roughness increases Plane .

工作工况下,对于第2缸来说,气缸套径向过盈量对气缸套变形影响很大,减小气缸套径向过盈量,有利于减小气缸套的变形,减小机体顶面不平度,但会增大机体上缸套止口平面的不平度;减小缸盖螺栓预紧力对气缸套变形影响很小,可减小机体顶面不平度和机体上缸套止口平面的不平度;适当减小缸盖螺栓沉孔深可以减小气缸套的变形,但会造成机体顶面不平度和机体上缸套止口平面不平度的增大。

It generalized the traditional k-means algorithm from the point of view of prototype selection. In detail, the kPC algorithm substituted hyperplanes for points used in k-means algorithm to be the prototypes and got these hyperplanes by minimizing the sum of the squared distances between each point and its closest hyperplane.

它从原型选择的角度推广了传统的k-均值算法,用超平面替代k-均值算法中的中心点来表示聚类原型,并通过最小化样本点到最近中心超平面平方距离之和来求取原型超平面。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。