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This thesis focus on GPS application in magnetic suspension engineering:① the formulation of oblique cylindrical projection is worked out according to characteristics of long distance precise engineering and map projection theory. The author has developed an application to accomplish coordinate conversion from generally used coordinate systems to oblique Maglev Coordinates System.② considering not only project peculiarities but also position of control points, selection of initial points, connection type, selection of repeat baseline and ground observed quantities, GPS network is designed on electronic map and we may extract GPS network information by program developed using Visual Basic 6.0 while the results are stored in control point file and baseline vector file.③estimate accuracy of various GPS networks designed on electronic map by method of 2D restriction adjustment. GPS network simulation design and accuracy estimate come true.④Predominate the rules how connection type , repeat baseline and precise baseline of range finder influence GPS network precision through comparing accuracy of various GPS network. Thereby, the solution how to establish GPS network in long distance precise engineering is figured out.

本论文主要研究GPS技术在磁悬浮工程中的应用：①根据长距离精密工程的特点，从地图投影原理出发，推导出斜轴圆柱投影的应用公式，并编制计算软件，实现从常用坐标系统向斜轴磁悬浮坐标系统的转换计算；②在AutoCAD电子地图上，根据工程的需要，并充分考虑控制点的点位、起算点的选择、连接方式、重复基线的选择和地面观测量的选择等因素，在电子地图上进行GPS网的设计，根据Visual Basic 6.0语言编程，提取出GPS网资料，保存在控制点文件和基线向量文件中；③对在电子地图生成的各种类型的GPS网进行二维约束平差的精度估算，实现了GPS网的模拟设计与精度估算；④通过对各种控制网的精度比较，掌握连接方式、重复基线、精密测距仪基线对GPS网精度影响的规律，解决了长距离精密工程GPS网的建立方法。

To prepare studying hierarchical intelligent control system of material flows in mineral processing plant further, picturing, transition rulers, analytic methods, relevance matrix and dynamic equation, defect in applying of Petri network, fall short of orient object models applying are discussed after technology of formalization model built, non-formalization built and compound model. And Petri network system with time attribute is expanded opening network system with interface of input and output. The network system expanded with all attributes of basic Petri network model has hierarchy and recursiveness, can be analyzed with mathematical tools of network system and can deal with concurrent and asynchronously also.

为了对选矿厂生产物流递阶智能控制系统的进一步研究奠定基础，本文在讨论了形式化建模技术、非形式化建模技术和复合模型的基础上，研究和分析了Petri网的图形表示、变迁规则、分析方法、关联矩阵与动态方程、Petri网模型应用中的缺陷、面向对象模型应用中的不足，并把采用赋时的Petri网系统扩展成为对外界有输入和输出接口的开放网系统，扩展后的Petri网具有递阶性和递归性，同时保持基本Petri网的所有性质，使模型仍可采用网系统数学工具进行分析，并可处理生产物流系统中的并发性和异步性。

Said invented door plank storable and superposable screen window has left and right storage boxes for holding the screen roller made up by rolling up screen, and comprises latch hook, coupling bar, upper and lower guideways, the left and right storage boxes are freely fixed on the upper and lower guideways, according to the requirements the left and right storage boxes can be slided, and can be formed into square frame together with upper and lower guideways, and the screen can be spread and laid on said square frame so as to form the invented door plank storable and superposable screen window.

通过把抑制由纱网卷绕收藏成纱网滚筒的左右的收藏箱及纱网的上下端边固持的纱网往面内外方向弯曲的挂钩装成相对于上、下导轨自由滑动，而且将在左右的收藏箱装成自由滑动的连动杆设置为和该上、下导轨的卡合孔自由卡合，将左右的收藏箱自由固定于上、下导轨，按照需要使左右的收藏箱滑动，和上、下导轨一起形成方形框，而且借着在自收藏于左右的收藏箱内的纱网滚筒拉开纱网下展开、铺设成该方形框，可形成门板状可收叠纱窗。

The susceptance of the capacitor and the ration of the OLTC are regarded as control variables in the reactive power optimization to overcome the disadvantages in application of equal wastage ration method in distribution network.

传统的无功优化技术是以等网损微增率方法为基础的[1]，其主要优点是简单、有效，但对于配网来说，却存在两个主要缺陷：由于配网总的无功最优补偿容量无法确定，所以等网损微增率方法无法得到一个较优的补偿方案；在配网的实际运行中，当电压偏差较大时，有载调压变压器往往作为凋节电压的手段而对无功功率的分布产生影响，使得等网损微增率方法难以实现。

The combined production of vertical and horizontal wells can make horizontal well production rates be 2 to 5 times greater than unstimulated vertical well rates, but the areal sweep efficiency is less than that of vertical well pattern untill when the perforation ratio is greater then a certain value, which depends on the pattern of the combination. Seven spot pattern of the combination of vertical and horizontal wells has some advantages over others.

当水平井和直井联合面积布井时，在同样的压差下，水平井的产量要高于相应直井井网的直井产量的2～5倍，但只有当穿透比达到一定程度，或水平井达到一定长度时，其波及系数才高于相应直井井网的波及系数（五点法井网的穿透比界限为0.521，七点法井网的穿透比界限为0.430），因而在水平井开发油气田时，必须保证水平井一定的长度，这样从长远的观点，水平井才能显示出优势，对比性分析表明，水平井和直井的七点法联合布井和直井井网以及水平井和直井的五点法联合布井井网相比，具有一定的优势，数值模拟表明，在水平井和直井的联合面积布井的各种方式中，改进的九点井网是一种较好可取的布井方式。

To overcome the deficiency in managing and operating the global data of both Longitude-Latitude Grid and Quaternary Triangular Mesh, a new discrete global grid-Degenerate Quadtree Grid is put forward, and its tessellating principle and coding rule are presented. Then, its geometrical distortion is calculated and analyzed in details.

为有效解决经纬度格网与四元三角网在全球空间数据管理与操作中存在的不足，提出一种新的全球离散格网剖分方法―球面退化四叉树格网，给出该格网的剖分原理与编码规则，并对其进行几何变形计算与分析。

The results show that the water breakthrough time shortens with the increase of the horizontal well length. Under the same well space and production conditions, the water breakthrough time of five-spot pattern is longer than that of seven-spot and nine-spot pattern. With the increase of angle between the horizontal well and the horizontal direction, the water breakthrough time shortens in five-spot well pattern, firstly increases and then decreases in seven-spot pattern, and increases in nine-spot pattern. The influence of reservoir and fluid parameters on the water breakthough time is little.

计算结果表明，井网的见水时间随水平井长度的增加而缩短；相同的井距和生产条件下，五点法井网的见水时间要长于九点法和七点法井网；随水平井与水平方向夹角的增大，五点法井网的见水时间缩短，七点法井网的见水时间先增加后缩短，九点法井网的见水时间增加；油藏和流体参数对井网见水时间影响不大。

It can continue work , operation is convenient , the function is reliable, the width is between 1-2.3 meters, and the net silk and hole can adjust according to need.

塑网生产线是近年来开发研制的宽幅塑网挤出设备，生产线设计为连续工作，操作简便，性能可靠，生产塑网的幅宽在1-2.3米之间，网丝、网孔可按需要调整。

Indeed, his interpretation illuminates an Enlightenment world that hovered between reason and bigotry, and where a quasi-scientific interest in the occult and the emerging genre of the novel fed a public that was hungry for " tales of wonder ".

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Two years after that French Open win over Laver, the 35-year-old Rosewall won the U.S. Open, taking out Wimbledon champ John Newcombe in the semis. In 1974, at the age of 39, Rosewall reached the finals of Wimbledon and the U.S. Open.

在法网击败拉沃尔获得冠军两年后，35岁的罗斯瓦尔在美网半决赛击败了温网冠军约翰-纽坎伯，最终拿下了美网桂冠。1974年，39岁的罗斯瓦尔打进了温网和美网的决赛，但是都被康纳斯击败了。

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。