极限

The research results show:(1) we combine time series method with the dispersed Markov Chains theory of stochastic process, and present a Markov Model based the time series analysis for predicting the precipitation for groundwater resources evaluation. Results show that the time series-Markov Model is efficient, and it has higher accuracy than that of the single model of time series;(2) started from the systematic point of view, we analyze the metabolic process of groundwater, establish the ultimate metabolic equation of groundwater for protecting the water resources, and discuss the value of reducing evaporation for making full use of the water resources;(3) Through a theoretical analysis of the results of the experiments, we draw a conclusion: the critical depth on evaporation of groundwater is in step with the height of the maximal capillary rise of media.

通过理论分析与实验研究，得出主要结论如下：(1)论文将传统的时间序列方法与随机过程马尔可夫预报模型相结合，以预报大气降水量，并用于地下水资源评价，创造性的提出了地下水资源评价中降水量的时序——马尔可夫预报模型；(2)论文从系统的观念出发，分析了地球水循环中地下水代谢过程，建立了旨在保护水资源的地下水极限代谢条件方程，并进一步阐明了减少蒸发量和增加补给量在水资源保护中的重要作用；(3)论文通过实验研究和理论分析，论证了潜水蒸发存在极限埋藏深度，得出了潜水蒸发极限埋深与介质最大毛管水上升高度一致的重要结论。

In the first part, for competitive discrete-time dynamical systems on a strongly ordered topological vector space, we prove that any α-or ω-limit set is unordered and lies on some invariant hypersurface with codimension one, which generalizes M.

在第一部分中，对于强序拓扑向量空间上的竞争离散动力系统，我们研究了极限集的序结构和极限集的几何位置，证明了任何α-或ω-极限集是无序的且位于一个完全无序的，余维为1的不变Lipschitz流形上。

This article is mainly discussed the relation between some important concepts and conclusions about the Limit of Sequence, the Limit, Continuity ,Differentiability, Integrability of Function, the Infinite Series , and the Limit, Continuity, Derivativeness,Differentiability of Multivariable Function ,as well as the Multiple Integral, and Integral with parameter .

本文对数列极限，一元函数的极限、连续性、可微性、可积性，无穷级数，多元函数的极限、连续性、可导性、可微性以及重积分，参变量积分中的一些重要概念和结论之间的关系进行了一些探讨，每一个问题都作了适当说明或举出反例，并对一些相关的内容进行了讨论，得到若干结果。

In this paper, the limit cycles in a nonlinear deterministic model in the continuous culture vessel with variable yield is studied.

用微分动力系统的定性理论研究了一个非线性连续微生物培养动力系统的极限环问题，探讨和估计了存在极限环的条件和极限环的周长。

The limit oxygen concentration and the limit gas velocity are critical index to evaluate the flammability of materials.

极限氧气浓度和极限气流速度两个极限参数，是衡量材料可燃性的关键指标。

Research results show that: 1 The FLSD is basically path independent whether is for steel or for aluminium; 2 Shape of the forming limit curve in stress space is sensitive to the type of material model used in transformation form FLD to FLSD; 3 the anisotropy of sheet metal has considerable influence on the FLSD; 4 The application of the FLSD in sheet metal processes optimization was considered to be effective and more precise.

钢板和铝板应该分别采用不同的材料模型进行转换。3）板料各向异性性能对板料成形极限有影响，在使用FLSD时应该考虑板料的各向异性情况；4）FLSD在应用于多道次成形零件的有限元分析时，由于其具有的与加载路径无关的特点，因此比通常用的FLD更加准确可靠。本课题的研究为以后在板料成形仿真中，使用应力成形极限曲线代替应变成形极限曲线，提供了理论和试验依据。

Limit is the soul of differential calculus, limits' calculation is an important content of the limit theory.

极限是微分学的灵魂，极限的计算是极限理论的重要内容。

Definition The infinite series converges and has sum if the sequence of partial sums converges to ,that is .If diverges, then the series diverges. A divergent series has no sum.

定义如果级数的部分和数列有极限，即，则称无穷级数收敛，这时极限叫做这级数的和，并写成；如果没有极限，则称无穷级数发散。

The uncertain relationship between the double limit and the quadratic limit is explained and the determination methods to the nonexistence of the odd function's limit are given.

本文阐明二重极限与二次极限的不确定关系，给出齐次函数的极限不存在的判定方法。

Themed as X'PRESS WITHOUT LIMITS, Asian youth can enjoy the X Games by watching high-level action sports competition to be performed by more than 200 top athletes from over 20 countries and 5 continents.

本次赛事的主题为"炫出真极限"，为期3天的比赛将吸引来自5大洲20多个国家的200多位极限运动好手同场竞技，一展极限运动的风采。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。