无穷

Its primary coverage includes: Function and limit, derivative and differential, theorem of mean and derivative application, indefinite integral, definite integral and application, space analytic geometry and vector algebra, function of many variables differential method and application, multiple integral and curvilinear integral, infinite series, differential equation and so on.

其主要内容有：函数与极限，导数与微分，中值定理与导数应用，不定积分，定积分及其应用，空间解析几何与矢量代数，多元函数的微分法及其应用，重积分与曲线积分，无穷级数，微分方程等。

Key words: partial differential equation; Lewy equation; real analytical; infinitely differential solution; compactly supported set

引用格 式：吴小庆。Lewy方程的无穷可微解。中国科技论文在线精品论文，2010，3(1)：19～27。

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l 专业数码卡拉 OK 延时混响系统，可接驳两支麦克风，无论对唱或二重唱均能挥洒自如，更采用原装进口之数码延时器件，令您开怀高歌，歌声特别动听，乐趣无穷，让您一机享有环绕声效果及最适合家庭影院或营业场所享受卡拉 OK 的乐趣。

It is pointed out that Ming Antu was the first inventor of Catalan numbers in the world . He constructed one geometric model, in which some infinite series with Catalan numbers as coefficients were contained.

指出了明安图是世界上第一位卡塔兰数的发明人，他构建了一个几何模型，在这个几何模型中包含了用卡塔兰数作为系数的无穷级数。

The composite wedges consist of two materials with equal apex angle and are perfect bonded at the interface.

是有限长的扇形角域或无穷长的角域，其解函皆由全平面的解函所叠加而成，函内只有径向的多项式函以及周向的简单三角函所组成。

The result shows that the mixed boundary condition can greatly reduce the calculation area without affecting accuracy of the solution.It is followed by the higher accuracy of Dirichlet boundary condition which makes the boundary error greater when measured points is near the boundary, so we must take a sufficiently large border region.The homogeneous boundary condition has relatively large error, but the use of non-triangle poles devices makes apparent resistivity calculation error become small, because of elimination of the effect on potential difference for the infinite boundary. In inversion, in order to save computing time, homogeneous boundary conditions are often used to perform finite element forward calculation.

结果表明，混合边界条件精度最高，可大大缩小求解区域而不影响计算精度，其次是Dirichlet边界条件精度较高，但测点越靠边界误差会越大，必须取足够大的边界区域，齐次边界条件的误差比较大，但如果采用非二极装置，通过电位差计算得到的视电阻率，由于无穷远边界对电位差的影响基本消除，视电阻率计算误差与混合边界条件下的接近，在反演中，为了节省计算时间，经常使用齐次边界条件进行有限元正演。

In this chapter, we use a simple method to show that if the ratio of the channel traffic to the number of frequiency bins is held constant, the unslotted system can provide the same throughput as the slotted system, when the number of frequency bins approach infinity.

在这一章中，我们还采用了一种简便的方法证明了当信道业务量和频率槽数均趋于无穷，且它们之比恒定时，时槽系统与非时槽系统性能一致，同步系统的最大吞吐量是异步系统的两倍。

We give examples to show that some infinite objects can be approximable and some can not.

本文举例说明，并不是任意的无穷形式对象都可以被逼近。

We prove that the well limit behavior can be used to get sufficient conditions for an infinite object to be approximable.

本文发现了统一的充分条件保证一类无穷形式对象可逼近，这一充分条件正是形式系统序列的良极限行为。

The well limit behavior can be used to get sufficient conditions for an infinite object to be approximable, for a theory to be limit decidable and for an incremental computation to be correct.

良极限行为可以用于获得如下无穷形式对象可逼近的充分条件、使用极限判定方法的充分条件和增量式计算正确性的充分条件。

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Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新