一阶

The first and second order statistical properties of the type of traffics well.

该模型可以很好地体现这类业务的一、二阶统计特性。

To compensate for nonlinear distortion of RF power amplifiers, a novel adaptive digital predistortion method based on piecewise polynomial was proposed, and multiple lower-odd-order-only polynomials in the form of orthogonal coordinates were used for predistorter design.

为补偿RF功率放大器的非线性失真，提出一种新的基于分段多项式的自适应数字预失真方法，使用多个直角坐标形式的低阶奇次多项式设计预失真器。

To solve the problem of analysis and computation during using a finite impulse response model with high orders, orthonormal basis functions are constructed by utilizing partial system information and then introduced into traditional FIR modeling. A generalized FIR modeling method is proposed.

为了解决高阶脉冲响应模型带来的分析和计算上的困难，利用系统的部分已知信息构造正交基函数，并将其引入到传统脉冲响应建模中，提出了一种广义脉冲响应模型辨识方法。

These new wavelets inherit some basic properties of the corresponding classical wavelets, such as the orthonormality, the order of regularity, the time-frequency localization characteristics, and so on, meanwhile some performances of the new wavelets are improved.

新子波类中的每一个子波均继承了原始子波的许多基本性质，比如规范正交性，正则阶，时、频局域化特性等，同时也得到某些性能的改善。

A one-notrump advance of an overcall shows 8-11 points and a stopper in opener's suit, regardless of vulnerability and suit opened; two notrump is similar, 12-13 points (less after a two-level overcall).

回答人的1NT为8-11点且敌方开叫花色有一挡，无关局况及开叫花色；2NT为12-13点，条件相当。二阶争叫后点力更少

This study developed a window-based design module of single step free overfall through Visual Basic program and compared with the design dimension of drop structures in Taiwan.

本文利用VB程式语言，研发一套单阶自由跌水视窗化设计模组，且收集数笔台湾地区现地跌水工设计尺寸作为辅佐资料，藉此了解台湾地区跌水工设计概况，并进一步选择案例应用之。

A fourth-order compact finite difference alternating-direction-implicit algorithm is proposed for solving the unsteady-state Navier-Stokes equations of fluid flow and heat transfer using the streamfunction-vorticity formulation. Point-successive overtaxation iteration is used to achieve the steady solutions.

本文构造了求解二维非定常涡量流函数形式Navier-Stokes方程组的一种四阶紧致交错方向隐式差分算法，对包括能量方程在内的离散化方程组采用逐次超松驰迭代法求得稳定解，求解了二维非定常粘性不可压缩流体的流动与传热问题。

Based on modern optimization theory and optimal control theory, this dissertation studies some questions as follows:1. The optimization model of parameter identification of three-dimensional geologic history numerical simulation, algorithm and its applicationGeologic history numerical simulation is a basic content of basin numerical simulation, and the porosity is the major parameter in the evolution and development process of oil-bearing basin. According to the sedimentation and burial mechanism, the physical and chemical principles of oil geology, the mudstone porositys non-linear parabolic partial differential equation has been established.

本文应用现代最优化及最优控制理论，对如下一些问题进行了研究： 1、三维地史数值模拟的参数辨识优化模型、算法及应用地史模拟是盆地数值模拟的一个基础性的研究内容，地层孔隙度是含油气盆地地史演化发育过程中的重要参数，根据地层沉积埋藏机理和石油地质的物理化学原理，通过引入数学物理方程概念，建立了泥岩三维孔隙度场方程，根据问题的特点，给出了方程的定解条件，对方程的动边界也给出了处理方法，并且证明了解的存在性与惟一性，在此基础上建立了以当今实测数据为拟合准则的三维地史数值模拟的参数辨识优化模型，这是一个含有二阶偏微分方程约束的泛函极值问题。

Therefore,it is necessary to research diffusion equation for suspended sediment because it describes the sediment move process in the water body.The equation is a various coefficients second-order linear partial differential equa-tion,such equation under complex boundary condition is very difficult to get its analytical solution,while its numerical solution relative analytical solution is more easier and has the obvious superiority:simple,the computation convenience.but to get a kind of difference format which is good accuracy and stability is not easy.

泥沙扩散方程实际上是一个变系数的二阶线性偏微分方程，这样的方程在各种复杂边界条件下求解是十分困难的，求它的解析解在数学上存在着难以克服的障碍，无法求出其精确解，因此常用数值方法求它的近似解，相比较而言，数值方法有着明显的优势：即简单灵活、计算方便快捷，但要寻找一种精度高、稳定性好、计算方便的差分格式也并非易事。

Methods: A recently deeloped method of sampling perilymph from the cochlear apex of guinea pigs was used in which the samples represent fluid originating from different regions along the scala tympani.

一种最近发展的从豚鼠耳蜗顶部进行外淋巴液采样的方法被应用于该项研究，采取这种方法可以获得代表沿着鼓阶不同区域产生的液体的样本。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。