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Is a professional R / C model plane manufacturer founded in May 2006, although soon after the establishment, but in possession of a large model plant for many years has worked on the production model with rich work experience of skilled workers and managers, product owners are adopting high-quality materials of light Balsa wood, fiberglass fibers, polyester and so on, is currently produced by various types of remote control model of ARF diverse species, including: exercise machine; like a real machine; exercise machine; 3D machines and other electrical and oil-type actin.

华天模型有限公司是专业的R∕C飞机模型生产制造商公司成立于2006年5月，虽然成立不久，但拥有一批有多年大型航模厂工作过、对航模生产具有丰富工作经验的技术工人及管理人员，产品主材料是采用高质量的轻质Balsa木材、纤维玻璃钢、聚脂等，目前公司生产的各类型ARF遥控模型品种多样，其中包括：练习机；像真机；运动机；3D机等电动和油动类。

There are few equivalent circuit modeling methods for UWB antennas. This thesis compares the characteristic of some existing modeling methods and presents a general and precise modeling method for UWB antennas. Firstly, establish the narrowband model of the antenna, and compute the difference between input admittances of the antenna and its narrowband model. Secondly, implement rational approximation of the difference to build the macromodel, and convert it into SPICE equivalent circuits. Lastly, combine the narrowband model and the macromodel to form the ultimate equivalent circuit model of the antenna.

本论文针对目前UWB天线等效电路建模方法比较少的现状，结合现有的天线建模方法的一些特点，研究了一种系统通用、模型精度高的新建模方法：首先建立超宽带天线的窄带模型，计算天线及其窄带模型导纳的差值；接着对差值进行有理多项式拟合，得到相应的宏模型，并转化为SPICE等效电路；最后合并窄带模型与宏模型电路，得到天线等效电路模型。

The comparison of the computational results of real gas model with that of perfect gas model shows that it is very important to apply the real gas model in the numerical simulations, and also the real gas model presented shows itself more profitable and applicable in numerical applications.

对单列叶栅和透平级内复杂三维凝结流动的数值计算方法进行了研究，结合欧拉/欧拉型自发凝结数值模型，以FLUENT软件N-S求解器为平台，建立了适合工程实际应用和复杂条件下非平衡凝结流动的数值计算系统。

The results of analysis show that the shock detached distance computed by two temperature model or three temperature compare well with the experiment data, and the heat transfer rate is highest for one temperature model with non-catalytic wall, and lowest for equilibrium gas model, and the heat transfer rate for perfect gas model is between the non-catalytic wall and fully catalytic wall .

结果表明：采用两温度非平衡气体模型计算的激波脱体距离更接近实验情况；采用平衡气体模型计算的壁面热流最高，一温度非平衡气体模型完全非催化的壁面热流最低，而完全气体模型的壁面热流在两者之间。

Therefore, the observation of Na layer is one of the important method to study the dynamical process in the mesopause region. In this paper, we combine a timedependent photochemical model, the International Reference Ionosphere model (IRI95) and a photochemical model of sodium to develop a time dependent sodium photochemical model.

本文建立了时变的中高层大气光化学模式，并与国际电离层模式(IRI95)与Na层光化学理论相结合，建立完整时变的中高层大气Na层光化学模式，着重研究Na层分布的昼夜变化。

There is high precision in the model experiment of sloping plate and the RTP field errors are less than 0.001 nT. In the model experiments of single and multi-sphere, we can obtain the better RTP results using the DCT method when the magnetic dip is 5°, and the results are excellent when the dip is 15°.The shape of contour line, the maximum and the plane location of magnetic model are all good comparing with the theoretical anomalies when the model is perpendicular magnetization.

在倾斜板状体模型实验中，化磁极误差小于0.001 nT，具有较高的精度；在单球体及多球体模型实验中，采用基于DCT的化磁极方法在5°倾斜磁化时就可以取得较好的化磁极结果，15°时化磁极的效果更加明显，其等值线的形态、幅值以及所反映的磁性体的水平位置都得到较好的恢复；这说明，采用本文方法进行化磁极时，可以取得较好的效果。

This paper is mainly focused on data segmentation and model reconstruction problems in Reverse Engineering fields,The main contents include Sharp Featurebased quadrilateral domain extraction from a mesh model,connectivity between multiple B-spline surfaces,fast algorithm for fitting multiple B-spline surfaces on model with arbitrary topology,setting up a hierarchically structured constraintbased data model and binary cubic interpolation of splines with C~2 connectivity for type-Ⅱtriangulations on rectangular domain.

主要内容包括：网格数据的数据分割及矩形片的提取、多个B样条曲面间光滑拼接、任意模型的多个B样条曲面拟合的分块快速算法、基于二元三次样条函数在TYPE-Ⅱ分割下的曲面重建方法、基于约束和层次结构的模型表示及一个小型逆向工程软件系统的建立等。

First, characteristics of product models in traditional design and concurrent design are compared. Therefore, thoughts of design object and design process working in the double harness are put forward. And, two typical representation methods of product model, and their localization are expatiated. Concept of generalized engineering semantic feature is defined. State of product design model is expressed. Then, an integrated representation method of product model is advanced. Based on the Pro/Engineer software platform, product-modeling system for product general information model is set up.

首先，分析和比较了传统设计与并行设计中产品模型的特点，提出了并行设计中同时考虑设计对象并行与设计过程并行的思想；在阐述两种典型产品模型表示方法，分析其片面性的基础上，引入了广义工程语义特征的概念，表达了产品设计模型的状态，提出了一种集成的产品模型表示方法；基于Pro/E软件平台，建立了产品广义信息模型建模系统。

First, characteristics of product models in traditional design and concurrent design are compared. Therefore, thoughts of design object and design process working in the double harness are put forward. And, two typical representation methods of product model, and their localization are expatiated. Concept of generalized engineering semantic feature is defined. State of product design model is expressed. Then, an integrated representation method of product model is advanced. Based on the Pro/Engineer software platform, product-modeling system for product general information model is set up.Second, relationships between different product models and approach of data exchange are analyzed.

首先，分析和比较了传统设计与并行设计中产品模型的特点，提出了并行设计中同时考虑设计对象并行与设计过程并行的思想；在阐述两种典型产品模型表示方法，分析其片面性的基础上，引入了广义工程语义特征的概念，表达了产品设计模型的状态，提出了一种集成的产品模型表示方法；基于Pro/E软件平台，建立了产品广义信息模型建模系统。

Dioxins re-generation model in zone after combustion is established on the foundations of high temperature homologous model, low temperature catalytic models (Langmuir- Hinshelwood model and Eley- Rideal model) and de novo synthesis.

建立了基于二的高温气相模型、低温催化模型(Langmuir-Hinshelwood和Eley-Rideal)和低温从头合成模型基础上的炉膛出口烟气中二再生成模型。

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。