基本表达式

词组短语

basic representation

与基本表达式相关的网络例句 [注：此内容来源于网络，仅供参考]

Then, the differential equations are solved by the Fourier expanding and Hankel integral transform method. Integral solutions of soil skeleton displacements and pore pressure as well as the total stresses for poroelastic media are obtained. Furthermore, a systematic study on Lamb's problems in transversely isotropic saturated half-space is performed. Integral solutions for surface radial, vertical and tangentical displacements are obtained both in the case of drained surface and in the case of undrained surface excited by vertical and tangentical harmonic resources respectively. Numerical results show the obvious difference between the model of isotropic saturated poroelastic media and that of transversely isotropic saturated poroelastic media.

其次，基于Biot波动理论，在圆柱坐标系下求解了横观各向同性饱和土的Biot波动方程：通过引入位移函数，在圆柱坐标系下将横观各向同性饱和土的Biot波动方程转化为两个解耦的6阶和2阶控制方程，然后根据方位角的Fourier展开和径向Hankel变换，求解波动方程，得到以土骨架位移和孔隙水压力为基本未知量的积分形式一般解，并用一般解给出了饱和土总应力分量的表达式；再以基本解为基础，系统地研究了横观各向同性饱和半空间体的Lamb问题，考虑表面排水或不排水两种情况后，首次得到横观各向同性饱和半空间体在表面竖向和水平谐振力作用的下径向、竖向和周向位移的解析解。

According to the basic concept of Gamma function and Γ distribution,this paper gives out some expression including probability density,distribution function and basic numeric characteristic value.

依据Gamma函数及Γ分布的基本概念，给出了非均质性储层渗透率K的概率密度、分布函数以及基本数字特征的表达式。

The theory of high-strain dynamic testing of pile bearing capacity. The basic calculation expression of pile high-strain dynamic testing is rederived in a simple way, especially the semi-empirical analytical expression of wave equation . Besides, theoretically it has been proved that it's not necessary to have identic section hypotaxis along pile, and the application condition and reasonable operation have been pointed out. the CASE comprehensive method is suggested to replace the traditional CASE method. author has made a lot of improvement for the mathematical model of the matching analysis measured curves in the business software CCWAPC and scientific research software JXWAPC of which the author is in charge.

关于高应变动力试桩法的理论研究以简明方式重新推导了高应变动力试桩法基本计算表达式，尤其波动方程半经验解析表达式，同时从理论上证明了CASE法并不需要桩身等截面假设，亦指出了该方法的适用条件及合理使用办法，并建议利用CASE综合分析法取代传统的CASE分析法；作者在其负责编制的商业软件CCWAPC及科研软件JXWAPC中，对波动方程拟合分析法数理模型进行了一系列重大改进，考虑了灌注桩桩周土体的变形特性和动荷截作用下的非线性效应、大直径桩的横向惯性效应。

The main work and innovation1 In general , a image compression method has different effect to different image . Some are fit for image which has much high frequency . Some are fit for image which has much low frequency .This paper analysis the applicability of fractal algorithm . In this dissertation , an improved algorithum is given . The basic algorithum without eight change and the joint use of quantitative coding , The compression ratio and PSNR can be adjusted , and it can get more quickly speed of coding .2 To a group of exact fractal code , the decoding image can be any resolution .With this characteristic ,choose the proper domain block and range block,this paper get an algorithum which can get higher decoding PSNR and speed than the basic fractal algorithum.3 Give a new method to calculate the scale factor . The calculation of basic algorithum is complex and enormous . The factor of scale is an important variable of the basic algorithm. Now there are two methods to calculate the factor of scale .A new method was given to calculate the factor of scale. The calculation load and complexity are reduced by the new method. Compared with the basic algorithm , the method can reduce coding time.4 The basic fractal algorithum is based on the Collage theorem and contraction mapping theorem . A mathematic model based on basic fractal algorithum is given .

本文的主要工作及创新点主要包括以下几点：1一般情况下，一种图像压缩的方法对不同特点的图像，压缩效果会有所不同，本文利用分形压缩编码对不同特点的图像进行编码，分析了分形编码对不同图像的编码适用性，利用去掉8种变换的分形编码算法与简单的均匀量化编码方案相结合，得到了一种可以调节压缩比与解码质量的分形编码方案，该提高编码速度6倍以上。2分形编码的特点之一是分形解码的分辨率无关性，即对于一组分形编码可以将其解码到任意分辨率下，本文利用分形编码的这一特点，结合不同的量化编码方案，选择合适的定义域块与值域块及适当的编解码分辨率，得到了一种提高解码质量，编码速度提高12倍以上的加速算法。3比例因子是基本分形算法中的一个重要变量，目前有两种计算比例因子的方法，文中给出了一种新的求比例因子的方法，该方法简化了求比例因子的计算，从整体上减小了基本分形算法的计算量，简化了算法4分形压缩的数学基础是不动点定理与拼贴定理，本文根据基本的自动分形编码方法，建立数学模型对其进行推导，得到了用普通数学的极限理论解释分形编码的数学表达式，从而对由基本分形编码得到的解码图像中的像素点的值给出了确定的表达式。

The SCVFV(the convection-diffusion difference scheme based on control-volume face values) scheme was put forward. The theory of the SCVFV scheme was systematically elaborated. The general interpolation formula of the SCVFV scheme was given. The formulas of the SCVFV scheme based on the Cartesian coordinate were derived. The precision, the mass conservation property and the preventability of the false-diffusion of the SCVFV scheme were theoretically analyzed.

提出了基于控制容积面值的对流扩散差分格式SCVFV，系统地阐述了SCVFV格式的基本思想，给出了SCVFV插值公式的通用表达式，推导了直角坐标系下完整的SCVFV格式的表达式，从理论上分析SCVFV格式的精度、守恒性及反伪扩散性。

Using the edited program, the deflection, stresses on three directions, principal stresses, maximum shearing stress and principal strain at any computing point under any number of wheel loads in a road pavement structure with any number of layers could be computed.

本文叙述如何根据非轴对称半空间弹性体应力和位移的基本表达式以及由多层体系边界条件建立的线性方程组编制计算机程序，运用巳编制的计算程序，可在袖珍计算机和微型计算机上求得多层弹性体系内任意点的应力和位

Process expression of a Petri net is a regular expression with the basic subprocess set of the net system as alphabet.

要把进程表达式的概念推广到无界Petri网，会遇到两方面的困难。一方面，由于正规表达式的字母表必须是一个有限字符集，是否可以把一个无界Petri网的各种可能的运行情况都归结为有限个基本子进程的组装？

In the research on the backward-wave oscillation suppression the startoscillation current which is derived from Two-wave theory approximately is given up. Four typical un-uniform slow wave structures start-oscillation current equations are derived by backward-wave amplifing gain expressions with the Two-wave theory. Then the start-oscillation current rates I〓/I〓 between ununiform circuit and uniform circuit of the four structures have been got.

在返波抑制问题的研究中，从二波理论出发，抛弃了二波理论中从起振条件出发来得到起振电流近似表达式的方法，而是利用二波理论的基本关系式分别推导出了四种典型实用的非均匀输出线路的返波增益表达式，采用计算返波增益的方法来得到四种非均匀输出线路的起振电流与均匀输出线路起振电流的比值I〓/I〓。

Elements of C language programming course involve principal concept of programming, basic techniques to design algorithms, data types, operators, expressions, input/output, control structures, structural programming method, arrays, strings, pointers, functions, module programming method, structure, union, bit-wise operation, preprocessor and files.

本课程的教学基本要求包括熟悉并掌握程序设计基本概念、基本数据类型、运算符和表达式；熟练使用基本的数据输入输出方法；掌握 C语言的控制结构、结构化程序开发方法；掌握数组、字符串、指针的概念并能熟练进行应用编程；了解函数概念及程序模块化开发方法；了解结构与共用体，位运算，预处理以及数据文件的基本处理技术。

Evidence suggests that 1 under more stable stratification, the basic flow, if moving faster at low and high levels (particularly in the presence of jets there), allows a resulting meso-β unsteady wave to propagate eastward with respect to basic flow and even at greater velocity compared with it; 2 vertical windspeed shear of basic flow causes instabilities of the TWT perturbation; 3 considering the second derivative of basic-flow wind with respect to z (denoted by zz≠ 0 which is simply given as β* hereafter) the expression for the phase velocity of vortex Rossby wave is obtained, which is unidirectional in propagation with respect to basic flow; 4 VRoW has its physical origin from β*, i.e., from z-varying heterogeneities of y-direction averaged vorticity of the basic flow field; 5 VRoW phase velocity is associated with zonal wave number k, its energy is dispersive and the group velocity exists in the x direction; 6 when windspeed meets the condition of β*, TWT disturbance instability may be that of mixed VRoW and gravity wave; 7 if basic flow is subject to linear shear but does not meet the condition of β*, the TWT instability is that of inertia-gravity wave.

在大气层结比较稳定的情况下，如果基本气流在低层和高层较大(有可能存在低空急流和高空急流)，此时产生的β中尺度不稳定扰动相对于基流向东传播，甚至于快速向东传播。基本气流在垂直方向上的风速切变对于中尺度横波型的扰动起着不稳定的作用。如果考虑基流的二次切变，可以得到涡旋Rossby波的相速度表达式，涡旋Rossby波相对于基本气流是单向传播的。涡旋Rossby波产生的物理根源是基本流场的风速二次切变，亦即基本流场y方向的平均涡度在空间z方向上的不均匀所致。涡旋Rossby波的相速度与纬向波数也有关，它的能量是频散的，其在纬向x方向也存在群速度。在基本流场的风速存在二次切变时，横波型不稳定可能是混合的涡旋Rossby重力波的不稳定；而在基本流场的风速仅仅存在线性切变，不存在二次切变时，横波型扰动的不稳定则是重力惯性波的不稳定。

与基本表达式相关的网络解释 [注：此内容来源于网络，仅供参考]

basic representation：基本表达式, 基本表示(法)

basic reader | 基础读本, 基础教科书 | basic representation | 基本表达式, 基本表示(法) | basic salary | 基本薪水

basic representation：基本表达式

basic repetition rate 基本反復率 | basic representation 基本表达式 | basic rock 基性岩

Extended：扩展的

下面的描述适用于扩展的 (extended) 正则表达式,它与基本正则表达式的区别会在最后做一个总结. 基本的构造块是匹配单个字符的正则表达式. 大部分字符,包括所有字母和数字,是匹配它们自身的正则表达式.

kinetic theory of gases：气体动理论

摘要: 从气体动理论(kinetic theory of gases)的原理出发导出了非平衡条件下高温气体反应流基本守恒方程组.讨论了出现在方程组中的各种通量在非平衡条件下的意义,给出了从微观出发的输运系数表达式.介绍各种物理动理论与化学动理论过程的微观理论,

net：线网

从本质上讲,Verilog所具有的混合抽象层次由两种数据类型所提供,这两种数据类型是线网(net)和变量(variable). 对于连续赋值,变量和线网的表达式能够连续地将值驱动到线网,它提供了基本的结构级建模方法. 对于过程赋值,

operand：运算对象

表达式(Expression)是由运算符(I)perator)和运算对象(Operand)及圆括号组成的一个序列. 表达式是语言中最基本的组成成分,它表示一种求值规则.

Relational Operator：关系运算符

4-3 关系运算符(Relational Operator) 6-4-4 布尔运算符 6-4-5 集合运算符 6-4-6 字符串运算符 6-4-7 位逻辑运算符 6-4-8 运算符优先级 6-5 流程控制 6-5-1 语句的基本概念 6-5-2 表达式语句(Expression-Statement) 6-5-3 流程控制语句 6-5-4 可视化程序与嵌套程序 6-6 数组与指针 6-6-1 数组类型 6-6-2 指针类型 6-6-3 浅谈

ultrasonic transducer：超声换能器

因此接收换能器所收到的超声回波的频率经过了两次多普勒效应过程,所以收发超声频率之差与血流相对于换能器运动速度的两倍成正比,多普勒频移的表达式为:超声诊断仪均由三个组成部分组成:超声换能器(Ultrasonic transducer)部分、基本电路部分