模数

He proved that:if the total moving times of mesh M is a finite number and independent ofΔt andh.the L2-norm error estimate is optimal;if Mh is independent ofΔt and bounded,energy norm error estimate is optimal.

并证明了当网格变动次数M是不依赖于Δt和h的有限数时，近似解与真解的L2误差估计是最优的；当Mh不依赖于Δt且有界时，能量模误差估计最优。

METHODS: Eighty guinea pigs were randomized into control group, model group, salbutamol treated group and Maxin liquid treated group. Asthma model s were established by ovalhumin. The changes of eosinophile in bronchoalveolar lavage fluid, thromboxane B2 and 6-Keto-prostaglandin F1a in blood, the airway resistance and the pulmonary compliance were observed by Pap staining, radio-immunity , and pulmonary function test instrument of MIL type specially for experimental animal.

实验设正常对照组、模型对照组、复方麻辛组、沙丁胺醇组，选用豚鼠共80只，采用清蛋白造模，并运用巴氏染色法、放射免疫法、MIL型实验动物肺功能测量仪，分别检测肺泡灌洗液中嗜酸粒细胞数、血浆凝血恶烷(TXB2)、6-酮－前列腺素(6-K-PGF1a)以及清蛋白激发后气道阻力和肺顺应性。

The above-cited computer system has been used for a real-time simulation study of a destroyer exhaust steam and deareator pressure control system.

1引言 近年来，随着数字机特别是微机在工程上的普及，数一模混合仿真已为人们普遍采用，其优点不言而喻。

Elevating the valid time of using the cell, and using the cell more rationally. The MCU AT89C51 was used as its main CPU and combined with display module, A/D converter, expended memory and watch dog technology in order to satisfy the need; a new type of infrared wireless technology was used to transmit the data collected and was given the real circuit design picture.

能更有效、合理地使用和保养电池组，提高电池使用寿命；该系统采用单片机主机AT89C51结合显示、模／数转换、扩展存储和看门狗技术；数据传输采用RS-232串口转红外无线技术进行传输，并给出了具体电路设计图示。

This is a few Die lift probability model FOSS share with you!

这是数模中电梯概率模型源码，与大家分享！

Thesolutions compose self-contained inner product space (weight function is constant 1),i.e., they are basic series of Hilbert space; hence any internal waves could beexpanded into generalized Fourier series. With difference method, Sturm-Liouvilleequation is transformed to matrix eigenvalue problem. Each eigenvalue is related to ahorizontal wave number, and relevant solution is a certain mode of internal wave.

其解系构成完备的加权(权函数为1)内积空间，即Hilbert空间，从而内波现象可以展成该解系的广义Fourier级数；采用差分方法，将 Sturm-Liouville 方程转化为矩阵特征值问题，每一个特征值对应一个内波波数，该特征值对应的解则是内波的某一模态。

Firstly, this paper analyzes the forces acting on hydrobomb's body and empennage respectively. Then the mathematical model of hydrobomb's trajectory in seawater is discussed. Secondly, the simulation program is completed with Matlab.

分析了空投水雷水下无动力运动过程中雷体和尾翼的受力情况，并在运动受力分析的基础上给出了研究其水下散布的数学基础－水下无动力运动弹道仿真数模。

Based on the hydrokinetics study of jigging process, the free vibration equations of ideal fluid and actual flow vibration equations have been established. These equations are the theoretical foundation to set the operation parameters and air pressure of the jig. The similar criteria and their related equation of model jig have been deducted by actual flow vibration equation. These similar criteria can be used for parameter transformation between model jig and industrial jig. One set of single cell model jig with measuring system has been constructed in laboratory.

本文通过对跳汰过程的流体动力学研究，建立了跳汰机中理想流体的自由振动方程和实际水流的振动方程，为跳汰机工作制度及风源风压的确定提供了理论依据；利用跳汰机中实际水流的振动方程推导出了跳汰机模型试验的相似准数，建立了模化准则关系式，为工业跳汰机与实验室跳汰机之间的参数转换提供了理论依据；并设计建造了一套实验室单槽模型跳汰机及其实验检测系统，为深入开展跳汰理论的研究创造了条件。

It is proved by the analytical and numerical method that the modulus of the Z transform of a finite impulse response sequence has no extreme values at poles (with maximums along imaginary axis and no extreme values along real axis), and the negative second order derivative of the modulus normalized along frequency axis with respect to angular frequency has maximums at the poles.

根据实测瞬态电磁脉冲响应，较好地反演了导体球和导体长椭球的冲激响应，测得了它们的雷达截面和谐振频率。用解析与数值相结合的方法证明了有限冲激响应序列Z变换的模在极点无极值（沿虚轴有极大值，沿实轴无极值），而沿频率轴的归一化值对角频率的负二阶导数在极点有极大值。

In this paper, we study syzygies of injective resolvent s and cosyzygies of injective resolutions, and probe the relationship of injective resolvent s and injective resolutions, and then prove that if R is a Noetherian ring with id≤n, then every left R-module has injective dimension at most n or ∞.

研究了内射预解式的合冲模与内射分解式的上合冲模，并探讨了内射预解式与内射分解式之间的联系，证明了如果环R是Noether环且id≤n，则每个左R-模的内射维数小于等于n或者为∞。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。