地方法

Theoretical Part: Through theoretical analysis of chemothermodynamics, combustion and engineering thermodynamics, factors that affect explosion limit were determined, which include temperature, pressure, spark ignition energy, electrode shape, direction of flame propagation and size of explosion vessel.

理论部分：根据化学热力学、燃烧学和工程热力学的基础理论，从本质上定性地分析了爆炸极限的影响因素，包括温度、压力、爆炸容器的大小、点火能量大小、以及火焰传播方向等，得出了这些影响因素对爆炸极限的影响规律，以确保实验有完整的理论基础指导；在此基础上本文提出了一种新的推算在常温常压下可燃性纯质和混合工质制冷剂爆炸极限浓度的理论方法，该方法由可燃性气体的化学组成来推算上下限浓度，不需要其它条件；对混合工质制冷剂，只要再知道混合配比，即可以推算出爆炸极限，使预测爆炸极限的工作更简单、方便。

Geography will display its comprehensiveness better in 21st century through establishing and oprating the basic concept--coordinated Commensalism of Human and Environment relationship Regional System, and has such development trends as deepening the integration of related subjects internalizing development, improving micromechanism, widening applying region, renewing methods and paying more attention on methodology.

1世纪的地理学将通过"人地关系地域系统的协调共生"这一基本概念的确立与运用而更好地体现地理学的"综合性"，具有与相邻科学交叉更加深入、学科内部的发展更加合理、微观机制进一步深入、应用领域不断拓宽和方法不断更新以及思想方法论得到特别重视等发展趋势。

When he was asked how he learned to speak so compellingly in public, he replied:"I did it the same way I learned to skate by doggedly making a fool of my self untill I got used to it."

当有人问他，他是如何学会声势夺人地演说时，他答道："我是用自己学会溜冰的方法来做的：我一个劲儿地让自己出丑，直到我习以为常。"

It can be used for solving multi-objective problems with a concave ob-iective and cost function s and a convex feasible region, The program of the algorithm is writ-ten in ANSIC language and has been successfully run on IBM P/IAT-286 and 386 machines.

系统地讨论了非线性多目标最优化算法─—广义ZW法，它是Zionts－wallenius法的改进和推广，使得ZW方法能够有效地解决具有凹目标与价值函数，以及凸可行域的非线性多目标最优化问题。

Firstly, the general method to building the system is analyzed, and one method based on the theory of the shortest procedure doing the same job is discussed. Secondly, the regional increasing method is used to decide the water flowing direction, in which way the actual drainage area water system is better simulated, producing the satisfying fitness between the built water channel and the actual one. The result also accords with the actuality of water conflux.

本文分析了数字流域水系生成所采取的一般方法，并且针对实际情况采取了以"最短流程法"为基础的数字流域生成方法，以区域增长法确定水流方向，更好地模拟了实际流域水系的情况，使得生成河道和实际河道达到了很好的拟合效果，也更加符合汇流的实际情况。

Chapter 1 briefs the relation between invariance and computer vision and summarizes the research and application of invariance in computer vision. Chapter 2 first derives the transformations of three camera models, then makes the correpondences between the models and three typical geometrical transformation groups by analysing the transformations respectively. The correspondences supply the theoretical basis for applying geometrical invariants to resolve the problems of computer vision. In Chapter 3, we describe the geometrical invariant theory and prove some geometrical invariants of coplanar points, lines or conics by algebraic method. In order to use the invariants of conic pairs to describe general 2D shapes, we discuss the perspectively invariant representation of planar curves using conies in detail. A system consisted of two TMS320C25 and based on moment invariants is introduced in Chapter 5. The system can recognize more than 30 different shapes of object model or more than 10 plane models with similar shape in real time.

第一章简述了不变性与计算机视觉的关系，以及计算机视觉中的不变性研究和应用概况；第二章推导了计算机视觉中常用三种投影模型的变换关系，通过对这三种变换关系的分析，分别建立了这三种投影模型和几何学中的三种变换群之间的一一对应关系，为几何不变性在计算机视觉中的应用提供了理论基础；在第三章中，我们介绍了几何不变性的理论，并且用代数方法证明了共面点、直线、二次曲线的几何不变量和射影不变量；为了把二次曲线的不变量用于一般二维形状描述，在第四章中我们详细地讨论了用二次曲线实现一般平面曲线的透视不变性表示的方法；第五章介绍了用两片TMS320C25构成的、基于不变矩形特征的运动目标实时识别系统。

Conjoint analysis is a method that can effectively reflect the variation of consumer needs; hence it is widely applied in the research of market segmentation.

联合分析是一种有效地反映消费者需求差异的方法，所以被广泛地应用到市场细分的研究中。

Finally, the rat hole numbers are counted according to connected component to statistics.

试验结果表明，此方法能有效地统计鼠洞数量，从而有效地监测鼠害的发生。

of operation in startstop transmission in which the signals representing a series of characters follow one another contiguously (for example, in sending steadily from a perforated paper tape as compared to manual keyboard operation).

起止式传输的一种操作方法，在此方法中，表示一系列字符的信号连续地一个紧跟一个(例如，与人工键盘操作比较，穿孔纸带操作是连续发送的)。

In this way, it's convenient to achieve rectangular coordinate of cam contour line and provide a new simple practilal method to its design and manufacture.

用这种方法可以方便地求出凸轮廓线的直角坐标，为凸轮的设计和制造提供了一种简捷可行的新方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。