比较函数

In the test of weak-form efficient hypothesis, this thesis used auto regression, auto correlation function and unit root three models, and got the basically same results. In the test of semistrong-form efficient hypothesis, this thesis used market model, index return model and constant mean return model three ways to estimate the normal return when making use of event study, and the results were also basically same.

其中，为求全面和比较，在对弱势有效市场的假说的检验部分，本文运用了自回归检验、自相关函数检验和单位根检验三种计量模型，检验结果基本一致；在对半强势有效市场假说的检验部分，本文运用了事件研究法，并在估计正常收益率时使用了市场模型、指数收益模型以及均值模型三种方法，估计结果也相对一致。

Based on the series expansion technology in complex potential theory established by Muskhelishvili the complex stress functions can be estabished. By utilizing the continuity principle of the boundary condition and the characteristics of far field and according to the comparison of the coefficients of the terms on both sides of the equation with the same exponent the present problem can be transformed into solving of linear equation set.

根据Muskhelishvili复势理论的级数展开技术，构造了合适的各区复应力函数；然后，利用边界上位移、力的连续性条件和远场的性态，通过等式两边同次幂指数的系数比较，将问题转化为线性方程组的求解；结合叠加原理，获得混凝土在此情况下环向应力的解析解答。

Through a test, questionnaire survey and interviews, this paper intends to investigate the images of the freshmen with different specialities about the concepts of limit, continuity andderivative of a function at a point x_0 and the relationship among them.

函数在点x_0处的极限、连续和导数三者概念，本文通过问卷调查和访谈，对不同专业的大学一年级本科生的概念表象和三者关系的理解水平进行了研究，而且对三个专业进行显著性差异比较。

By applying contour integral method and high-order displacement functionsof MM,we obtain the accurate stress intensity factors of mixed-mode crack.Then,the open crack propagation of the mixed mode I and II is simulated by means oftheories of linear elastic fracture mechanics.This provides a simple and effectivenumerical way for crack evolvement studying.

接着，文中采用围线积分法和流形方法的高阶位移函数来计算得到比较准确的混合型裂纹尖端的应力强度因子，然后基于线弹性断裂力学的裂纹扩展准则，用流形方法实现了平面I-II混合型张裂纹扩展的数值模拟，为数值方法研究裂纹的演化行为提供了一条简单而有效的途径。

The results show that the increasing Marangoni number will lead to more nonlinear distribution of temperature field, but streamfunction of the cell center; vorticity on the wall and peak value of velocity diminish first, then increase, finally lose stability. The thermocapillary convection in the whole liquid zone appears to get stronger along with the augmentation of Prantal number. The effect of increasing of Biot number on temperature and flow fields is not obvious although the convection is strengthened a little. As increasing the aspect ratio A, thermocapillary convection induced by temperature gradient and liquid viscosity becomes stronger.

结果表明：温度场的非线性分布随着Ma数的增大而加剧，但对流涡胞中心流函数、壁面涡量和轴向、径向速度峰值并不象温度场随着Ma数的增大而单调增大，而是先减小，然后增大，最后失稳，表明Ma数对热毛细对流的影响比较复杂，针对不同的物理模型，会导致完全不同的流态；Pr数愈大，流体的热扩散能力在粘性扩散与热扩散能力之比中愈占支配地位，当Ma数一定时，热毛细对流随Pr数的增大在整个液体区域内有增强的趋势；Bi数增大，热毛细对流有所增强，但不甚明显；A的增大使得由温度梯度和流体粘性诱导的热毛细对流随之增强。

The main contents of this paper are asfollows: Programmed a software which is used in simulating the dynamic energyconsumption of buildings based on transferring function principle in the language ofvisual basic, at the same time compared with the traditional way of calculation ofenergy consumption in buildings to prove the correctitude of the software;Foundviable way of energy efficiency in buildings in the way of analyzing walls, windows,and many other aspect of structure of buildings, and using the software to analyzethe rate of the contribution of thermal quality to the energy consumption of buildings;Analyzed the rate of the contribution of the different weather to the energyconsumption of the existing dwelling in the way of calculating the energyconsumption in the whole year of the existing dwelling in two model cities choosefrom the region of north China and south China. Also is carrying on the contrast andviability assessments on the energy saving of the existing dwelling between northand southern region, getting the viability assessments and the conclusions inparticular data.

本文主要研究内容是：依据传递函数法原理应用Vb语言编写建筑物动态负荷仿真软件，并与传统负荷计算法进行比较，分析了程序的可靠性；从墙体，窗户及建筑结构的其它几个方面分析了建筑节能改造的一些可行性途径，并针对对建筑能耗影响较大的墙体与窗户就其热工性能的改变对能耗的影响应用程序进行了具体的分析；针对因地域性差异造成的气候差异对建筑节能措施效果的影响，就既有建筑的节能改造，分别选择华南华北地区的两个典型城市对其既有建筑节能改造前后的全年动态时时负荷进行计算，通过对比华南地区和华北地区的两个典型城市的既有建筑节能改造前后的能耗，及两城市节能改造后的节能效益，初投资回收期等方面，得出地域差异导致的气候差异对既有建筑节能改造的效果的影响的指导性结论及南北两地域既有建筑改造的量化结论和改造可行性的分析结论。

The experimental system extract the low-level features of images such as HSV histogram, the texture got from coexistence matrix, color correlogram, and according to the characteristic of our image database, design the evaluation function such as the average rank ratio to evaluate and compare the performance of different integration of different features including semantic, and validate the active effect of feedback using experiment results.

该原型系统提取了HSV直方图、共生矩阵纹理、颜色相关图等底层特征，同时根据图像数据库的特点，设计了平均位置比值等评价函数对语义特征与底层特征的各种结合的检索性能进行了比较分析，并对反馈效果进行了实验验证。

Comparing with Daikon,the method has two excellent features.Firstly,it is better expansible based on the RDBMS technology;Secondly,discovering of program invariants can be accomplished by the function of SQL query based on the technology of relational database which can detect the program invariants in a nimble way.

该方法和Daikon等现有的程序不变量检测工具检测方法比较具有明显的特色和优势：第一，基于关系数据库技术，具有良好的可扩展性；第二，使用SQL条件查询功能实现非函数依赖程序不变量检测，检测方法具有很好的灵活性。

Some kinds of method for comparing is given in this paper,try to supply all kinds of methods for the decider .

文章还给出不同个体多个目标的比较策略，力求在利润最大和成本、损失函数最小化的前提下，为决策者提供多种不同策略的选择方案。

This approach is better than old ones where the decision function is calcul.

跟过去一贯采用的每走一步都要计算判别函数的传统方法比较，具有较强的优越性。

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。