数学分析

Based on mathematical model, torque control and speed control methods of simulation of wind turbine based on DC motor are analyzed in detail. Then simulation model and experimental system are built to test and verify theoretical analysis.

以数学模型为基础，详细分析了直流电动机模拟风力机的转矩控制和转速控制方法，并通过建立仿真模型和实验系统对理论分析进行验证。

By means of the plating technology and the system designed and made ourselves, we call them as the direct-heat evaporating roll-pulled with vacuum piston and the helix evaporating of straight heat-wire with the negative thermal specific resistance , the align polishing ring films and the separating ones of pure gold have been plated directly at the inner wall of the capillary of Sealed-off CO〓 laser.

简便有效地使器件的输出功率、光束品质、稳定性和使用寿命都得以提高的作用效果；分析了放电驱动催化机理及催化效果与器件参数、工作状态及其中的等离子体过程的对应关系，建立了数学模型，编程数值计算了放电管内正柱区中等离子体参数分布及其与器件工作外参数的关系；利用我们设计开发的直热式真空活塞卷拖和负阻直热丝螺旋蒸镀工艺及制作的系统，在封离型CO〓激光器毛细管玻璃内壁上直接镀制出了单质金的镜面环膜和离散膜，经理论分析和实验检验，指出美国专利4756000号的环金方案将导致器件工作特性的改变和恶化，降低效率；肯定了正柱区边界部分场对建立良好的激光振荡的作用意义，明确提出了①作为高品质器件设计基础的弥散膜催化剂；②高斯管型弦驻波振动定型磨制、检测的新概念及相应的制备加工工艺；实际制出了管子，测定了其基本的工作特性和初期过程。

Fuzzy mathematics is an effective tool in analyzing and treating fuzzy information in these problems with uncertainty or arisen from noise.

模糊数学在不确定性、不精确性及噪声引起的问题上，有其特有的计算分析操作，能有效地分析和处理模糊信息。

This subject takes the thick metal sheet as the research object, adopting combination of physics analysis and mathematics calculation, combination of the theories study with computer simulating and concretely experiment, at the basic of analyze the stress strain of sheet"s thickness direction, consider the influence of sheet"s thickness variety and the stress straining neutral layers variety to the craft parameter, in the basic of using for reference of the sheet, figure out the craft process and craft parameter of the sheet.

本课题以金属厚板为研究对象，采用物理分析和数学计算相结合、理论研究与计算机模拟和具体实验相结合的方式，在分析板厚方向应力应变状况的基础上，考虑板厚变化和应力应变中性层变化对弯曲工艺参数的影响，在借鉴薄板弯曲的基础上总结出厚板弯曲的一般计算方法。

The main theoretical studies of this dissertation are rear axle about design and analysis from vehicular drive, economic, brake, stability to smooth-going etc. The theory of rear axle about design and analysis was deeply studied with using model mathematics and computer technology.

本文以驱动桥设计与分析理论问题为主要研究对象，从汽车的动力性、汽车的经济性、汽车的制动性、汽车的操纵稳定性、汽车的平顺性等方面考虑，运用现代数学与现代计算机技术，对驱动桥的设计与分析理论进行了深入细致的研究。

The shearing force is the most important factor to the grinding product of roll-plate grinder based on the analysis of three traditional power consuming theory.

通过动力学试验和分析，建立了辊盘式磨粉机粒度降低数学的模型。通过对三大功耗理论的分析，认为剪切力是影响磨矿产品粒度的主要原因。

Based on the time-frequency analysis (continuous wavelet transform and short time Fourier transform), the arithmetic uses the modulus maximum characteristic on the phase scale and carry frequency scale to recognize phase modulation rule of signal. So without whole wavelet coefficient the signal mathematics model can be obtained quickly. It provides well condition for application of arithmetic in practice.

该算法基于信号的时频分析（小波分析和短时傅里叶变换），利用小波变换的相位尺度和载波尺度的模极大值特征辨识信号的相位调制规律，因而在无需计算全部小波系数的情况下，可快速地获得信号的数学模型，为算法在实际中的应用提供了良好的条件。

Through the analysis of the reel estate froth and the real estate speculation and embarking from the non-speculative and the speculative demand factor which influence the real estate price, this article carries on the regression analysis using the real estate congenial price mathematical model to determine the real estate froth degree, thus we call it the demand factor modeling.

本文主要通过对房地产泡沫、房地产投机的分析，从影响房地产价格的非投机性和投机性需求因素出发，利用房地产投机价格数学模型进行回归分析来确定房地产包沫度，因而称之为需求因素模型法。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外，本文还研究了圆锥形件拉深成形过程中，随着拉深变形过程的进行，毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况，阐明了圆锥形件拉深成形过程中压边力合理变化的必要性；由毛坯主要变形区悬空锥壁部分的受力变形情况，从力学分析的角度，首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件；并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件，在其成形范围图中，将圆锥形件成形过程中的压边力划分为四个区域；总结并提出了圆锥形件成形过程中压边力合理变化的基本原则；建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式，并得到了有限元数值模拟及网格实验法的验证，证实了理论分析结果的正确性和可靠性。

The coupling fields are analyzed with FEM method. The laws of frost heave and thawing settlement from this analysis are consistent with that from model simulation, which has proved that the analysis is correct.

建立了人工冻结土体冻结温度场、水分场、应力场及位移场的耦合数学模型，揭示了温度、水分、应力、位移相互作用的基本规律及其对冻胀融沉的影响；利用有限元方法进行了耦合场的分析，获得的冻胀融沉规律和实际结果具有完全相同的规律，证明了分析方法的正确性。

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。

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。