矢量的
- 与 矢量的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The coordinate transformation and numerical integration was executed on the discretized tetrahedral elements based on which the 3-D MT vector-finite element method was implemented. A whole computation framework for 3-D vector-finite element method with unstructured mesh was given. Based on this some typical models were tested which has demonstrated that our algorithm could distinctively avoid problems caused by the fake solution and both the accuracy and efficiency were enhanced which made our algorithm has a bright future for further application.3. According to theory of Sobolev vector space and the discretization of Helmholtz space, the error estimate which was suitable for 3-D MT vector-finite element modeling was deduced by which the procedure of adaptive technique was guaranteed.4. Based on the fully unstructured tetrahedralization and optical strategy, the 3-D magnetotelluric h-adaptive vector-finite element method was presented through combining the error estimate. With this work, the accuracy and creditableness for 3-D MT complicatedly modeling was guaranteed.5. The 3-D magnetotelluric h-adaptive vector-finite element algorithm with unstructured mesh was implemented.
针对非结构化的四面体单元,采用坐标变换和数值积分方法,实现了MT三维矢量有限单元分析,建立起基于非结构化网格的三维MT矢量有限元计算流程,并对典型模型和国际标准电磁模型进行了数值模拟,结果对比和分析表明,基于非结构化网格的三维MT矢量有限元不仅消除了节点型有限元的伪解,而且具有很高的计算精度和速度,有广阔的应用前景。3、根据Sobolev函数的向量空间和Hemlholtz空间的分解,推导出基于残差的三维大地电磁矢量有限元后验误差估计公式,为三维大地电磁自适应矢量有限元数值模拟的实现奠定了基础。4、在完全非结构化四面体单元剖分及优化基础上,结合三维大地电磁矢量有限元后验误差估计公式,提出了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算策略,保证了对复杂大地电磁模型数值计算的精度和可靠性。5、实现了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算流程,对典型模型和国际标准电磁模型进行了数值模拟。
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Vectorgraph can be converted to a bitmap, but in turn bitmap converted to vectorgraph technical comparison difficult to achieve, a lot of graphic design software that support the use of pixel figure converted to vectorgraph, a general description of the software for free vector function realization, so that we can on the basis of vectorgraph to do the editing, but this kind of conversion sometimes is time-consuming, and sometimes does not achieve the expected results, it is generally used for relatively simple bitmap, or you would like some special effects.
矢量图可以转换成位图,不过反过来把位图转换为矢量图技术上比较难实现,很多图形设计软件都支持将像素图转换成矢量图性,一般可用矢量软件的描摹功能实现,这样我们就可以在矢量图形的基础上再做编辑,但这样的转换有时候会很耗时,有时候并不能达到预想的效果,一般用于比较简单的位图,或者想要表现一些特殊的效果。
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ABSTRACT Aiming at problems of trans-vector controller in a vehicle-carried induction motor such as variable rotor and stator resistance following motor temperature, and their inductance varying with flux saturation degrees. Firstly, CSI and VSI are introduced, for CSI, it can hold the advantages both FOC and DTC using stator flux directional, PI parameter and simulation are also introduced. Secondly, equations of IM in the synchronous rotary frame and its static counterpart, as figuring in the saturation condition of magnetic field, are dealt in this paper and the simulation results are presented. Thereafter, the parameter designing of PI trans-vector controller is processed, which features the non-linear model. In practical realization, as neglecting the dynamical change of motor inductance, this paper employs online modification of inductance parameters, according to the flux saturation, then transforms the non-linear equations into linear ones, and so compacts the structure of controller. Thirdly, in view of the maximum torque output is extraordinary requisite when Electrical Vehicle start up, accelerate, and overtake, this paper issues the maximum torque when both inverter and battery capacity is corporeally definite. Fourthly, on-line differentiating and analyzing both rotor's time constants and its flux by using the expanding order reduction and discrete Kalman filter equation are fathomed, in order to realize high-performance trans-vector algorithm, and also the simulation results are presented. Fifthly, the close-loop regenerative brake system, when the EV's torque is set constant, is deduced; at the same time, unification of electric drive model and brake model is executed. Combined with maximum charge current demands, the mathematical model for online yielding torque as a demand.
本论文针对车载异步电机在矢量控制器所遇到的问题:定转子电阻随温度变化及随电机饱和程度变化的转子电感及定子电感而影响电机调速性能提出一套完整的解决方案:分析了电流型逆变器和电压型逆变器在实现矢量控制时控制器参数的计算,分析出对于电流型逆变器在采用定子磁场定向时,其性能同时具有矢量控制和直接转矩控制两者的优势,并对电压型逆变器在转子磁场定向下的模型进行了仿真研究;建立异步电机非线性模型,推导出考虑磁饱和时异步电机在同步旋转坐标系及静止坐标系下的方程,并做出了仿真结果,建立异步电机在非线性模型下的矢量控制调节器的PI参数设计,在实际应用中,若忽略电机电感的动态变化,可以根据当前的磁路饱和状态而在线修正电感参数,从而将非线性方程线性化,降低控制器的复杂度;考虑到电动汽车在起动和加速超车时需要电机有最大转矩输出,本文讨论在逆变器容量一定和电池供电能力有限的情况下电机最大转矩输出问题;推导了异步电机扩展降阶、离散卡尔曼滤波方程在线辨识转子时间常数和转子磁通,用于实现高性能的矢量控制算法,并给出了仿真结果;推导出了电动汽车恒转矩给定的闭环回馈制动系统,实现了电动控制模型和制动模型的统一,而且结合铅酸电池最大充电电流的要求,为制动转矩在线给定建立了数学模型;设计了基于双DSP系统的高性能矢量控制器软硬件框图,并以大量实验数据说明矢量控制在电动汽车应用的实际应用状况。
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In this paper, the theory, algorithm, and experiment of automatic object detection and tracking are studied in depth. It is firstly pointed out that the essential of Mean Shift method is a special Newton-Gaussian method. A new method named Fast Mean Shift is established to stretch the conservative step of Mean Shift method. The convergence and validity of this new method are proved in theory. And it is also proved that the convergence speed of Fast Mean Shift is faster than that of Mean Shift. The contrast experiments of searching the maximum possibility density of random of data sets in plane and 3D space are done. The results show that this new method can reduce the iterations greatly. A new object tracking method based on Fast Mean Shift is built to improve the object tracking performance, which is shown in the face tracking experiment with the tennis sequence provided by the Ohio State University, and the car tracking experiment with the car sequence provided by Kalsruhe University. The face trcking experiment with highly noised images show that the object tracking method based on Fast Mean Shift has strong anti-jamming ability. A new fast color object detection technology based on characteristic color is established, which use characteristic color distribution to compute the characteristic color vector of any area in an image quickly. With the high performance search method, the fast object detection is achieved. At last, using object tracker based on Fast Mean Shift and color object detector based on characteristic color with the Kalman filter, PID controller, searial communication and other technologies, automatic object detection and tracking system with control system is built. The availability and anti-jamming ability of this system are verified by some object detection and tracking tests in different scenes.
本文对目标自动识别与跟踪进行了理论、计算、试验三方面的深入研究,主要包括:首次指出了目标跟踪技术中常用的均值迁移方法的本质为一种特殊的高斯-牛顿方法,改进了均值迁移方法步长取值保守的弱点,建立了快速均值迁移方法,证明了该方法的收敛性、有效性以及收敛速度优于均值迁移方法;进行了平面和3维随机分布数据集的最大概率密度搜索对比试验,试验结果表明,快速均值迁移方法大大减少了迭代次数;建立了基于快速均值迁移的目标跟踪方法,利用俄亥俄州立大学提供的乒乓球序列图像和卡斯鲁厄大学的汽车序列图像,对人脸和汽车目标跟踪性能分别进行了对比试验,并进行了高噪声人脸图像目标跟踪试验,结果表明,基于快速均值迁移的目标跟踪方法有效提高了目标跟踪性能,具有很强的抗干扰能力;建立了一种新型彩色目标自动识别方法,采用特征色彩分布函数实现了对任意图像区域特征色彩矢量的快速计算,建立了高效的搜索方法,实现了彩色目标的快速识别;将基于快速均值迁移方法的目标跟踪方法、基于特征色彩的目标识别方法与卡尔曼滤波、PID控制、串行通讯等技术结合,建立了带有控制系统的快速目标自动识别与跟踪系统,并在不同场景下进行了目标自动识别与跟踪试验,验证了快速目标自动识别与跟踪系统的有效性和抗干扰能力。
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Stressing on "fine reputation","quality","service","credit","practice", not only the grandeur.④Encouraging the innovation, not the unearthliness, playing down the effect of entertainment stars or idols, decreasing the fashion index.⑤"personality" is not the "self central". Social sense of responsibility and interpersonal "feeling of affinity" are both intensified.3.1.2 Factor analysis, revealing 19 value element vectors, which include "comfort","personality","simple","fine reputation","responsibility","service","price","wisdom","distinction","enthusiasm","stimulation","taste","sex difference","quality","vigor","idol","fashion","affinity","aesthetic" and so on. Four orientation diagrams coordinated with the average factors and the standard deviations of these 19 value elements, described the multi directional value orientation structure for China college students' sportswear consumption.3.1.3 Clustering analysis are applied to classify the former 19 value elements, which discovered that three inferior group are classified from the college students' consumption group based on the whole specimen data. It could be the reference of enterprise brand building for the orientation of consumption values.3.2 General personal values, self conception and demographic are lead into as three major variables for the interrelationship analysis of sportswear consumption value system.3.2.1 Firstly, the college students having their general values and existing the inferior group feature regarding to the consumption values.
三、研究的主要成果及其意义对中国大学生休闲服消费价值体系进行探索性分析1、首先对中国大学生休闲服消费价值观量化问卷所调查的样本数据进行频数统计趋向性分析,发现呈现的主要特点有:(1)"个性化"和"简约"已成为潮流,而寻"刺激"、找"激情"总体收敛;(2)追求"美感",更不放弃"舒适",两者兼得才是完美;(3)重"美誉"、讲"质量",重"服务"、讲"信用",求实际、不求高贵,"明智"有素;(4)求新不求怪异,明星、偶像效应淡化、时尚指数不高;(5)"个性化"不是"唯我化",社会责任感和人际"亲和力"在强化。2、其次对样本数据进行因子分析,揭示出以"舒适"、"个性"、"简约"、"美誉"、"责任"、"服务"、"价格"、"明智"、"独特"、"激情"、"刺激"、"品位"、"性差"、"质量"、"活力"、"偶像"、"时尚"、"亲和"和"美感"等十九个价值元素为矢量的休闲服消费价值体系,并以因子均值和标准差为参数勾画出19个价值元素坐标四方位图,从总体上描述了中国大学生休闲服消费多维的价值取向结构。3、再者进行聚类分析,对上述十九个休闲服消费价值元素作不同量值的分类,发现在样本总量中可以细分为有较大区分度的三个类别,呈现出大学生消费群体中存在休闲服消费价值体系不同的亚群体,可为以消费价值观为取向的企业品牌价值定位提供参考基谱。
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Data pre-processing technologies such as singular points elimination, registration and radius compensation are studied. Base on chord high difference algorithm, a new one called chord high difference-ratio algorithm is proposed to improve veracity and robusticity of singular points elimination. Then, a registration algorithm based on local surface reconstruction is proposed, which avoids infaust influence coming from single reference point error.
在弦高差法的基础上,提出了全新的弦高差—比法,提高了异常点剔除的准确性和柔韧性;提出了一种基于局部图形重构的重定位方法,该方法通过对特征球的最小二乘拟合,消除了单一参考点的精度对重定位的影响;在此基础上对重定位的误差进行了详细的分析,给出了精确的误差值,从数学的角度保证了重定位的精度;在三角网格法的基础上提出了基于Delaunay三角剖分的半径补偿新方法,有效改善了补偿矢量的计算效率和准确性。
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In this paper, the author studied the infrared properties of several kinds of vectored nozzles, including axial-sysmmetrical vectored nozzle, circular-to-rectangular vectored nozzle and spherical-traversing vectored nozzle, both in after-burning condition and non-after-burning condition. This work will fill in the gaps in this field of our country.
本文研究了当前国际上已经出现的几种形状的矢量喷管——轴对称矢量喷管、圆转方矢量喷管、球面过渡段矢量喷管,在加力与非加力状态下的红外辐射特性,此项研究将填补我国在矢量喷管红外辐射特性研究领域的空白。
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The results show that for the global scale characteristics of the vertically integrated vapor flux fields, which is described in terms of the rotational and divergent components of the stationary parts of the vapor field, both GOALS and FGCM--0 can reproduce the subtropical gyres in each hemisphere, the eastward water va- por transport of the mid--latitude westerlies, and the westward vapor transport of equatorial easterlies reasonably, though the precise positions of the gyres simulated by GOALS, and the intensities of the gyre centers in FGCM--0 do not match the observations accurately.
结果表明:(1)对垂直积分的水汽通量场的流函数及其对应的无辐散水汽通量矢量的模拟,三个耦合模式都能够较为合理地再现副热带大洋的涡旋结构、中纬度西风带的东向水汽输送、赤道东风带的西向水汽输送和东亚夏季风水汽输送等行星尺度特征及其季节变化,只是GOALS的涡旋位置、FGCM-0的涡旋中心强度,较之实际略有偏差。
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Detail Contents: Genetic disorders -- Immune deficiencies -- Breast cancer -- Colon cancer -- Melanoma -- Cystic fibrosis -- Hemophilia -- Liver disease -- Cardiovascular disease -- Muscular dystrophy -- Alzheimer's disease -- Parkinson's disease -- Huntington's disease -- Viruses: the cornerstone of gene therapy -- Viruses are living crystals -- Viral genomes may be RNA or DNA -- Viruses evolved from plasmids -- Viruses know how to infect cells -- The virus as a gene vehicle -- Viruses used in gene therapy -- Ashi DeSilva: a promising start -- Clinical trials defined -- Cells of the immune system -- Adenosine deaminase -- Preliminary research -- Clinical procedure for ADA gene therapy -- The DeSilva clinical trial -- Jesse Gelsinger: down to earth -- Ornithine transcarbamylase -- Preliminary research -- Clinical procedure for OTC gene therapy -- The Gelsinger clinical trial -- The investigation -- Concluding remarks -- Future prospects -- Safer vehicles -- Reducing immune rejection of the vector -- Improved risk assessment -- Redesigning human anatomy and physiology -- Ethics of gene therapy -- The Belmont report -- Clinical trials -- Physiological enhancement -- Cosmetic applications -- Legal issues -- Regulatory agencies -- The Gelsinger legal trial -- International regulation -- Resource center -- Eucaryote cell primer -- Recombinant DNA primer -- The human genome project -- X-linked severe combined immunodeficiency (SCID-X1)-- Alzheimer's disease -- Huntington's disease.
细节内容︰遗传疾病-免疫的缺乏-乳腺癌-结肠癌-黑瘤-囊性纤维变性-血友症-肝疾病-心血管疾病-肌营养不良-早老性痴呆病-帕金森疾病-亨廷顿疾病-病毒︰基础的基因治疗-病毒在活著水晶--病毒的基因可能是RNA或者DNA --病毒从plasmids被逐步形成--病毒知道怎样感染细胞--作为一辆基因车辆的病毒--基因治疗使用的病毒-Ashi DeSilva︰有希望开始-临床试验确定--细胞的这免疫系统-Adenosine deaminase-初步研究-临床程式给埃达基因治疗--这DeSilva临床试验-婕西Gelsinger︰到地球-Ornithine transcarbamylase-初步研究-临床程式给OTC基因治疗-- Gelsinger临床试验-调查-达成评论-前景-更安全的车辆--矢量的降低免疫的拒绝-改进风险估计-重新设计人解剖学和生理学--伦理学的基因治疗-那些贝拉蒙特报告-临床试验-生理提升-美容应用-法律问题-协调机构-- Gelsinger 合法审讯-国际管理-资源中心人物-Eucaryote信元第一-Recombinant DNA 入门--人类基因工程-- X 连结的严重的结合的免疫缺陷(SCID-X1)-早老性痴呆病--亨廷顿的疾病。
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Second,. according to the sector of voltage space vectors, adjacent switching state vectors are selected to calculate on-durations under volt-second balance principle. The questions of judging sectors and sector transition are discussed and qualitative analysis of performance is carried out.
由三相电压源型逆变器输出电压波形得到六个有效开关状态矢量,这六个开关矢量和两个零矢量合成一组等幅不同相的电压空间矢量,去逼近圆形旋转磁场。
- 推荐网络例句
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We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.
索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称;三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起,称之为挽歌体诗人或者史诗诗人,他们被称为诗人,似乎只是因为遵守格律写作,而非他们作品的模仿本质。
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The relationship between communicative competence and grammar teaching should be that of the ends and the means.
交际能力和语法的关系应该是目标与途径的关系。
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This is not paper type of business,it's people business,with such huge money involved.
这不是纸上谈兵式的交易,这是人与人的业务,而且涉及金额巨大。