动块

After finished the drawbar spring disc alignment then fix the spring disc stopper, and turn in let the spring disc total length to the standard length (114pcs about 277mm), then the drawbar top fix the M16x1.5 nut.

连接杆弹簧圆盘调整成一直线，然后固定弹簧圆盘的止动块，使之总长为标准长度（114个约277mm），再在连接杆顶部固定M16x1.5的螺母。

In order to improve the mechanical performance and transmission efficiency of the traditional pulsed mechanical continuously-variable transmission,a novel pulsed CVT is proposed according to the linear characteristic of hypocycloid at specific parameters and by combining the planet gear transmission mechanism with the crank slide block mechanism.

针对脉动式无级变速器动力性能差、效率低下等缺点，利用内摆线在特定条件下为直线的特性，将行星齿轮传动机构与曲柄滑块机构相结合，提出了一种新型脉动式无级变速装置。

The main work and innovation1 In general , a image compression method has different effect to different image . Some are fit for image which has much high frequency . Some are fit for image which has much low frequency .This paper analysis the applicability of fractal algorithm . In this dissertation , an improved algorithum is given . The basic algorithum without eight change and the joint use of quantitative coding , The compression ratio and PSNR can be adjusted , and it can get more quickly speed of coding .2 To a group of exact fractal code , the decoding image can be any resolution .With this characteristic ,choose the proper domain block and range block,this paper get an algorithum which can get higher decoding PSNR and speed than the basic fractal algorithum.3 Give a new method to calculate the scale factor . The calculation of basic algorithum is complex and enormous . The factor of scale is an important variable of the basic algorithm. Now there are two methods to calculate the factor of scale .A new method was given to calculate the factor of scale. The calculation load and complexity are reduced by the new method. Compared with the basic algorithm , the method can reduce coding time.4 The basic fractal algorithum is based on the Collage theorem and contraction mapping theorem . A mathematic model based on basic fractal algorithum is given .

本文的主要工作及创新点主要包括以下几点：1一般情况下，一种图像压缩的方法对不同特点的图像，压缩效果会有所不同，本文利用分形压缩编码对不同特点的图像进行编码，分析了分形编码对不同图像的编码适用性，利用去掉8种变换的分形编码算法与简单的均匀量化编码方案相结合，得到了一种可以调节压缩比与解码质量的分形编码方案，该提高编码速度6倍以上。2分形编码的特点之一是分形解码的分辨率无关性，即对于一组分形编码可以将其解码到任意分辨率下，本文利用分形编码的这一特点，结合不同的量化编码方案，选择合适的定义域块与值域块及适当的编解码分辨率，得到了一种提高解码质量，编码速度提高12倍以上的加速算法。3比例因子是基本分形算法中的一个重要变量，目前有两种计算比例因子的方法，文中给出了一种新的求比例因子的方法，该方法简化了求比例因子的计算，从整体上减小了基本分形算法的计算量，简化了算法4分形压缩的数学基础是不动点定理与拼贴定理，本文根据基本的自动分形编码方法，建立数学模型对其进行推导，得到了用普通数学的极限理论解释分形编码的数学表达式，从而对由基本分形编码得到的解码图像中的像素点的值给出了确定的表达式。

In order to study the mechanism from the structure of face-contacted blocks,based on the theorem of the movability of the face-contacted blocks, the method of vector analysis to distinguish the blocks' movability is supplied in this paper.

为了研究面接触块体结构力学机理，基于面接触块体可动性定理，给出了判定块体是否具有可动性的矢量分析计算方法，缩小了找关键块体的范围，为面接触块体结构的进一步研究奠定了基础。

In order to study the structure of face contacted blocks,the movability of three kinds of the face contacted block has been studied by vector analysis ,the scope of key blocks is dwindled, and the base for further study of the structure face contacted blocks has been established.

为研究面接触块体结构，运用矢量分析法判别了大同采场上覆岩层常见的 3种面接触块体的可动性，缩小了找关键块体的范围，对面接触块体结构的深入研究奠定了基

It is formed from controllable slide block mounted in guideway, length-fixed drive rod capable of driving slide block and making it move in guideway, controllable telescopic shaft and mobile and turnable working table consisting of moving platform for mounting cutting tool and working table for mounting workpiece, and utilizes the drive rod, controllable telescopic shaft, moving platform, slide block and guideway to form the invented redundant drive plane parallel closed link mechanism with several functions of cutting, grinding, load-shifting and assembling, etc.

由安装在导轨中的可控滑块、驱动滑块在导轨中运动的定长驱动杆、可控的伸缩轴及安装切削刀具的动平台、安装工件的工作台构成的可移动和转动的工作台组成。并由驱动杆、可控伸缩轴、动平台、滑块、导轨构成冗余驱动平面并联闭链结构。该装置既具有切削、磨削、移载、装配等多种功能，又具有简单结构、大作业空间和刀具实现姿态能力，以及优先的加工方向等优点的并联机床新结构。

So,it can use stereographic projection of vector for further theory analysis,such as judging movable block in dam foundation and side slope after determining structure plane which has influence in the stability of project,that can guide the analysis and study of the stability of .

为确定对工程稳定性有影响的结构面后，可应用全空间赤平投影作进一步的理论分析，判断出坝基和边坡中的可动块体，以指导岩体稳定性的分析研究和支护设计工作。

In addition, after a detailed investigation and study on geologic conditions of Jinzhou water-tight oil storage cavern by using Block1.0 and Unwedge software, respectively, all removable blocks relaed to each excavation plane of Jinzhou water-tight oil storage cavern were found and the magnitude of the removeable blocks with respect to the distribution of discontinuities and the position of excavation planes was systematically calculated.

阐明了块体理论赤平解析法可动块体辨识软件Block1.0的理论基础及编制思路，通过赤平解析法和Block1.0就某实例计算结果的对比，验证了Block1.0的准确性；同时，在对锦州地下油库勘察资料进行详细研究的基础上，分别采用Block1.0和Unwedge软件，找出了锦州地下水封储油洞库各开挖面上可动块体的分布情况，从开挖面位置和结构面分布两方面对锦州地下水封油库的稳定性进行系统评价。

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

Based on these, an improving μ-synthesis is presented, with which the high-purity distillation is designed well. 2. The robust performance problem of MIMO plant is explained with the plant direction angle, which shows that the robust performance varies with different input uncertainties and the μ-synthesis should be applied correctly according to the uncertainty structure. 3. Condition number and bandwidth are the important items for robust performance design in MIMO system. The H〓 two-block problems can not deal with the robust performance design of MIMO system because of the condition number cancellation. A general μ-synthesis procedure for MIMO system with uncertainties is presented. 4. For the SISO system, the object function in robust performance is amplified by at most 〓 than that of H〓 two-block problems in value: So the robust performance of SISO system can be done with the H〓 two-block problems to avoid the complicated μ-synthesis procedure. 5. All the conclusions and methods presented in this paper are demonstrated by some typical design examples.

从而形成一种改进的μ综合方去，并对精馏塔病态对象进行了鲁棒性能设计，得到令人满意的结果；（2）利用对象的方向角解释了MIMO对象鲁棒性能设计出现问题的原因，并提出不同输入摄动形式下系统的鲁棒性能问题也并不相同，因此利用μ综合处理鲁棒性能设计时，应根据不同的摄动情况采用不同的结构进行设计：（3）条件数问题和带宽问题是MIMO系统鲁棒性能设计的两个主要问题，指出由于条件数对消的存在使得一般H〓两块问题无法处理MIMO系统的鲁棒性能设计，而μ综合方法则是处理MIMO系统鲁棒性能设计的有效方法，并给出了其处理MIMO系统鲁棒性能设计的一般性方法；（4）提出对于SISO系统H〓两块问题（S/T问题、S/KS问题）的设计指标函数与鲁棒性能设计的μ指标函数在数值上最大差〓倍，因此对于一般SISO系统的鲁棒性能设计可以简单地用一般的H〓的两块问题处理，而避免μ综合设计的复杂过程；（5）本文中提出的结论和算法都利用H〓/μ发展中的典型例子：Doyle-Stein问题，Safonov的战斗机模型，精馏塔对象等进行了设计验证。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。