做模型

Power-law fluid is used to describe the Non-newtonian rheological property of the produced fluid in a polymer-driving well; the governing equations, boundary and initial equations of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially is established in bipolar coordinates system; formulas of instantaneous flow rate and stress distribution on the outwall of the inner cylinder of the unsteady flow of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially are established.

在理论上，用幂律流体模型描述了聚合物驱油井产出液的非Newton流变性；建立了双极坐标系下幂律流体在内管做轴向往复运动的偏心环空中非定常流的控制方程及边界条件和初始条件方程；建立了双极坐标系下幂律流体在内管做轴向往复运动的偏心环空中流动时瞬时流量和流体在内管壁上的压力分布计算公式。

This paper extends Salop's (1974) and Purvis's (1979) flexible exchange rates system small open economy model to the perfect sterilization operation dual exchange rates system. We assume the policy authorities choose the full employment output and desired financial exchange rates level as policy targets and use fiscal policy and monetary policy as policy instruments.

本文将Salop(1974)及Purvis(1979)同时兼顾总合需求面及总合供给面浮动汇制的小型开放经济模型，予以延伸至完全冲销措施(perfect sterilization operations)的双元汇制(two-tier exchange rates)，并假定政策当局选择以充分就业的产出及融汇达到想水准做为政策目标，并以财政政策及货币政策做为政策工具，为达此双重政策目标，则适当的政策搭配为何的课题。

Second order incident boundary condition on fixed incident boundary is derived for numerical simulations, based on the cnoidal or sinusoidal motions of wave maker paddle, which shows that the prediction with second order incident boundary condition is more accurate than the prediction with first order incident boundary condition. 2 The analytical solution for higher-order Boussinesq equations is derived and its applicable range is discussed. 3 A 2-D fully non-linear numerical model using boundary element method is developed to obtain wave forces acting on rectangular obstacle. 4 The three-dimensional fully non-linear waves are studied in a numerical wave tank using finite element method.The studies on the coupled numerical model combined Boussinesq equations with Laplace equation are following.

非耦合非线性波浪计算模型：1 根据造波板做椭圆余弦运动或正弦运动速度，推导出数值模拟波浪水槽时固定入射边界上的二阶波浪入射边界条件，数值计算结果和实验结果的对比表明采用二阶入射边界条件对波面升高的预报比采用一阶入射边界条件对波面升高的预报更为精确；2 推导了波浪水槽造波板做正弦运动所产生波浪的高阶Boussinesq方程摄动展开解析解，讨论了该解析解的适用范围；3 对整个波浪水槽应用边界元方法数值模拟了波浪对物体的非线性作用；4 用有限元法求解三维Laplace方程模拟了三维完全非线性波浪水槽。

In this article two functional modes of the Fly-back Converter (Continuous Conduct Mode and Discontinuous Conduct Mode) are particularly analyzed, which include their characteristics, applications, the critical pattern of two functional modes is argued, both the exact boundary from the angle of circuit parameters is crystallized, at the same time, basic principle of PFC under the DCM mode is introduced, which settle theoretical basis for the subsequent design; by establishing the mathematic model of the converter, a further investigation of the configuration is made, qualitatively and quantitatively, analyzed to settle exactly theoretical basis for the subsequent emulation and the experimental parameter; from the angle of steady-state analysis, the transfer function of the system is deduced to establish dynamic small-signal state equation, emulating the system with the help of matlab, then according to the simulation result and the theory of PFC revise the system, lastly, we adopt the project which add a zero-pole compensator to the voltage loop, by this way, a satisfied system performance is gained and the PFC scheme is ensured successfully; finally, based on the previously-done work, we combining with the situation of specific design requirement, acquired the numerical value of each unit devices in this converter

详细分析了反激式变换器的两种工作状态，连续模式(Continuous Conduct Mode ，简称CCM)和断续模式(Discontinuous Conduct Mode，简称DCM)以及各自的特点、应用场合，论证了两种工作状态的临界模式，从电路参数的角度明确了二者的界限，同时还介绍了DCM模式下PFC的基本原理，为后面的设计奠定理论基础；通过对整个变换器系统建立准确的数学模型，对此变换器的电路结构做了进一步的研究，定性、定量地分析了变换器各部分的工作状态，为仿真和实验参数的确定以及电路参数的优化提供理论依据；从稳态分析的角度，为系统建立了动态小信号状态方程并推导出系统的传递函数，利用matlab对系统进行仿真，进而根据仿真结果以及PFC的相关理论对系统进行校正，采用在电压环加入零点—极点补偿器的设计方案，得到了满意的系统特性并且保证了PFC的顺利实现；最后，在前面所做工作的基础上，结合设计要求计算出此变换器系统中每个元器件的数值，利用Pspice对其进行了仿真、优化，然后根据仿真结果搭建了硬件电路。

I made this model aircraft, but I went wrong somewhere with the fuselage.

我做了这架飞机模型，可是我在机身什么地方做错了。

There are lots of distances between our country and foreign in the research of Human-computer interface.

本文对人机界面的几个方面做了一些研究，尤其是对于人机界面的评价方法及用户经验模型的建立做了深入的研究。

And then I'll do some mockups and then I take it over to Julian and hope he can make those mockups look far better than my mockups.

之后我就做一些模型并交给Julian，然后希望他能将这些模型更加完善。

METHODS: Gelatin sponge (0.5 mm×0.5 mm) was implanted into deep fascia posterior segment of L3 transverse foramen of model group to establish models of L3 transverse foramen syndrome. The identical volume of sponge was implanted into gluteus maximus of experimental group. In the sham operation group, only L3 transverse foramen was exposed. The normal group was not given any treatment.

模型组将0.5 mm×0.5mm的明胶海绵置入L3横突后半段深筋膜中层下制备L3横突综合征动物模型；材料实验组将同样大小明胶海绵置于臀大肌下：假手术组仅显露L3横突，不置入明胶海绵：正常组为不做任何处理。

Firstly, it makes statistical significant testing of extra earning in declaration term of new stock. Secondly, it sets up linearity regression model of one factor to explain how much extra earning is from dividend. Finally, it sets up linearity regression model of multi-factor founding on theory analyzing of the first chapter to explain how many factors influence extra earning.

首先对新股公告期的超常收益做统计显著性检验，然后建立一元线性叵归模型，说明超常收益有多少是来自于股利，最后在第一章理论分析的基础上建立多元线性回归模型，说明这种超常收益的影响因素。

In the paper, the author collected the data of the long rock-socketed piles in Hangzhou. It reduced input data serving the ANN utilizing Principal Component Analysis. The author has established the ANN-model about rock-socketed piles in Hangzhou and has improved on it (especially combined the G.A.).

本文收集了杭州地区嵌岩长桩试桩资料，利用主成分分析简化了神经网络输入单元数，建立了该地区此类桩型的人工神经网络模型，并对模型做了改进。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。