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Based on the analysis of the affected extent of the neutral-point potential by every space vector on all kinds of voltage and current conditions the concept named neutral point control grade was proposed for the first time in this paper. The calculation formulas of NPCG were presented as well. Based on NPCG, a novel modulation scheme called optimized 3D space vector modulation (O3DSVM) scheme was proposed in a-b-0 coordinates based on the translation principle of axes, by which the space vectors with higher NPCG values are selected to synthesize the object vector to suppress the unbalance of the neutral-point potential.
该文通过对各种电流电压状态下每个三维空间矢量对直流中点电位的影响进行分析,提出了"中点控制度"(neutral-point control grades,NPCG)的概念,并给出了NPCG的计算公式;基于NPCG,在a-b-0坐标系下提出一种基于坐标平移原理的新型"三维矢量优化选择调制策略"(optimized 3D space vector modulation,O3DSVM),该调制策略能优化选择NPCG值较高的矢量以合成目标矢量,从而达到最大程度控制直流中点电位偏移的目的。
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This article studies based on the shortest path city public transportation intelligence inquiry system, first aims at the city public transportation line network chart establishment mathematical model; Then research based on above mathematical model database creation method and corresponding algorithm design, with take Dijkstra algorithm as foundation, based on path shortest public transportation line inquiry algorithm, and through simple analog data confirmation algorithm validity; Finally brief introduction according to this thought design realization city public transportation intelligence inquiry system.
研究基于最短道路的城市公交智能查询系统,首先针对城市公交线路网络图建立数学模型;然后研究基于上述数学模型的数据库建立方法和相应的算法设计,和以Dijkstra算法为基础的、基于道路最短的公交线路查询算法,并通过简单模拟数据验证算法的有效性;最后简要介绍按此思想设计实现的城市公交智能查询系统。
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Testing in terrain relief, and the algorithms can optimize the structure of TIN nicely.(2) According to the smoothness of the terrain and correlation between adjacency data points, the paper studied the possibility of smooth surface constructing of DEM based on TIN. Then based on Tayor fomula, vertical normal vector, triangular decomposition, continuous and smooth of surface and so on, a new kind of interpolate model of DEM was proposed based on TIN.
2分析原始地形起伏变化的连续光滑性以及邻近数据点之间的相关性,探讨了基于TIN的DEM光滑曲面构造的可行性,并基于二元泰勒公式、三角面剖分、曲面的连续光滑性等,提出了一种TIN上的DEM表面光滑插值模型,并通过构造数学曲面进行精度评估,并对模型进行了可视化分析。
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Based on the review of progress in parametric uncertainty nonlinear system control theory, it is noticed that design methods based on feedback linearization are the main parts and the author proposes a robust controller design method for a nonlinear parametrization uncertain system satisfying feedback linearization and triangularity conditions,and a robust output tracking controller for a nonlinear parametrization uncertain system based on the identification of uncertain parameters.
在对该领域研究进展分析的基础上,针对满足三角形条件和反馈线性化条件的非线性参数化不确定系统提出了一种鲁棒控制器设计方法,并针对非线性参数化不确定系统提出了基于参数识别的鲁棒输出跟踪器的设计方法。后者是本文为飞机防滑刹车系统设计输出跟踪器的理论基础,同时也是本文的创新点之一。在对结合力产生本质讨论的基础上,分析了滑水现象产生的原因和预防措施。
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With the ubiquitousness of the web, many cmss ? are now classified as web cmss ?, either because they have a web-based interface or because they focus on a web-based delivery system over the internet or an intranet. plone provides a web management interface and web-based delivery system.
使用普遍存在的web,很多cms系统现在被分类为web cms,因为他们要么由一个web界面,或者因为他们主要集中于一个通过内部网或者因特网的web发布系统。plone提供了一个web管理界面和一个web发布界面。
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To reduce the computation complexity of the eigenspace-based adaptive beamforming algorithm and improve the performance of it with a small number of snapshots,a modified eigenspace-based adaptive beamforming algorithm based on an unitary transformation is proposed.
1引言在众多阵列信号处理算法中,Feldm an等提出的基于特征空间的自适应波束形成算法[1]由于具有较强的稳健性能而受到学者们的广泛重视[2-4],但ESB算法需进行复矩阵求逆和特征分解,计算复杂度高。
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According to the different face representation mode, there are four identifying methods. They are the mode identifying method based on geometry feature vector, the feature vector identifying method based on algebra feature vector, the facial feature extraction method based on NN and design method of sorter.
根据表征方式的不同,人脸识别方法有:基于层次聚类的几何特征矢量模式识别法、基于代数特征矢量的特征矢量识别法、基于神经网络的人脸特征提取和分类器设计法。
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Just in order to solve thisproblem, this subject further researches the new display solving scheme --WindML based onVxWorks system, demonstrates the enormous advantages of the new scheme in technology,proceeds with the architecture of WindML, based on WindML basic 2D display scheme,throughthe research and study of the systematic principle of WindML system and different service andmanagement,I have put forward the Chinese solving scheme based on VxWorks system, andthrough the study and research of FreeType 2 font engine and vector font, utilized WindMLsystematic mechanism , have finished the implementation of bitmap and vector Chinesecharacter in VxWorks system, and on the basis of which, have designed and optimized theinquiry algorithm of the Chinese input method editor, developed the Chinese input method editorbased on VxWorks system.
本课题正是为了解决这一问题,深入研究了基于VxWorks 系统新的显示解决方案——WindML,论证了新方案在技术上的重大优势,从WindML 的体系结构入手,以WindML 基本2D 显示方案为基础,通过对WindML 系统的系统原理,各种服务和管理的研究和学习,提出了基于VxWorks 系统的汉字解决方案,并通过对FreeType 2 字体引擎、矢量字体的研究,利用WindML 系统机制,完成了位图及矢量汉字在VxWorks 系统中的实现,在此基础上设计并优化了汉字输入法的查询算法,开发出了基于VxWorks 系统的汉字输入法。
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The geology research of carbonate reservoirs in Ordovician of Tahe oilfield showed that many large dissolved vugs and fractures were developed. The spread of the reservoir take on a very heterogeneous state. And the typical fractured-vuggy reservoirs was formed. According to the combination of the various spaces, the formation was divided into vuggy formation, fractured-vuggy formation and fractured formation. The research showed that development of the vug is relevant to the its position on the structure, the fractures, the water surface and the weathering surface. Multi-phase charge and recharge of the oil in the reservoirs resulted in the complexity of the fluid distribution. So the"Bottle Model"was brought forward to explain the movement of the water-oil contact. The special storage space and the complex fluid distribution lead to the unstability of the production and the complexity of the water cut. In order to explain the characteristic of the fracture-vug unit was brought forward and the basic principle and method of the partition of the fracture-vug unit was formed. The classification and evaluation of the units were performed according the reserve and energy. Based on the research of geology characteristic and the fluid flow in the reservoir the comprehensive numerical simulation plan of the fractured-vuggy reservoirs were established. Through the selection of the simulation unit, fluid flow type and parameter equivalent the triple media reservoir simulation model was established. Considering the practical application the model was resolved by the DKR decomposition conjugate grads method. Based on the fine reservoir description of Dsitrict IV of the Tahe oilfield the various space type were classified and combined together. The geology model of Unit S48 was constructed. Two typical single well model was established according to the geology and the dynamic phenomena. Finally the single well model and the Unit S48 were simulated by the triple media reservoir simulator. Via the local grid refinement and coarsening in the simulation good matchs were gained. Based on the results of the simulation the reserve distribution, percent of reserve produced in various space and the natural energy were analyzed. The fluid was storaged in the fractures and vugs mostly and more than 90% the produced oil came from the systems. The energy belonged to the active one. The results of simulation accorded with the fact and showed the validity and practicability the research and the simulator.
塔河油田奥陶系碳酸盐岩油藏的地质研究表明,其储层中发育着很多大型的溶蚀洞、缝,储层的平面展布呈现出极度的非均质性,形成了典型的缝洞型碳酸盐岩油藏,根据各种孔隙介质在储层中的组合,将储层分为了溶洞型、裂缝-溶洞型和裂缝型三类;研究表明溶洞储层的发育和构造位置、裂缝的发育、潜水面和风化面的位置等因素有关;多期充注的油气成藏模式导致了流体复杂的赋存状态,由此提出了所谓的"瓶子模型",解释生产过程中油水界面的变化;特殊的储集空间类型和流体分布特征导致油田在开发过程中表现出很大的不确定性和含水变化的复杂性,为了合理的解释油气田开发过程中的动态特征,提出了"缝洞单元"的概念,并制定了"缝洞单元"纵横向划分的基本原则和依据及划分方法,并对"缝洞单元"进行了分类和评价;基于地质特征和流体在其中流动规律的研究,提出了缝洞型碳酸盐岩油藏的数值模拟综合解决方案,通过模拟单元的选择、流动类型和参数的等效,建立了三重介质油藏三维三相数值模拟模型,采用不完全LU分解预处理共轭梯度法进行了求解;在塔河油田4区精细油藏描述的基础上,将各种类型的孔隙空间进行了归类组合,建立了S48单元的地质模型;通过对油井生产动态进行分析研究,建立了两类和油井地质、生产动态相对应的单井模型;最后应用三重介质油藏数值模拟软件对单井模型和S48单元进行了数值模拟,通过局部加密和粗化等技术模拟流体流动规律,取得了很好的拟合效果;结合数值模拟结果,分析了各种介质中的储量分布、储量产出的百分比以及地层的能量,认为塔河油田缝洞型油藏中流体绝大多数储集于缝洞系统之中,所产出流体90%以上也来自于缝洞系统,其底水能量属于较充足的类型;模拟结果和油田实际情况符合较好,说明了地质研究和油藏数值模拟研究的正确性。
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Three classical prototypes of what-if analysis based on rules,what-if analysis based on delta table and what-if analysis based on incremental CUBE maintaining are analyzed.
给出了基于内存数据库的delta表模式的what-if分析算法和一种新的CUBE维护算法。
- 相关中文对照歌词
- BasedGod Fucked My Bitches
- CNBFTBGB Based Freestyle
- Money Over Suckas
- Everything Based
- Be Brave Welcome Home
- Wonton Soup
- Cashout On Me Based Freestyle
- Pretty Boy
- Bitch Mob Gangsta
- So Based
- 推荐网络例句
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Green function defined inphase space differs from one in coordinate space by its struc-ture which exhibits nonlocatity in coordinates and oscillatorybehavior with respect to momenta.
在相空间中定义的Green函数不同于通常坐标空间的Green函数,在结构上显示出对坐标的高度非局域性,而对动量则显示出振荡行为。
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The upper front part of a saddle;a saddlebow.
前鞍桥马鞍前面的上部分;前鞍桥
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The fame thing I don't like.
我不喜欢出名。