1) two-ray model
双线模型
1.
Based on the two-ray model for land mobile communication,a new two-ray model which is suitable for the low-orbit satellite communication is presented and the relation of space attenuation with the satellite elevation is deduced in this paper.
从陆地移动通信中电波传播的双线模型出发,根据低轨卫星通信的特点,提出了一种适用于低轨卫星通信电波传播的双线模型。
2.
By considering the air-ground radio communication channel as a "two-ray model",the PDF of the received signal envelope,represented with the average power and the Rice factor,is developed.
将空地通信信道视为"双线模型",推导了用信号平均接收功率和莱斯因子表示的接收信号包络的概率密度函数;假设接收端多径分量的到达角服从某范围内高斯分布,给出了接收信号的多普勒功率谱表达式及其示意图;考虑地球曲率对空地通信的影响,建立了信道的时延模型,并给出了接收信号的时延功率谱。
2) Bilinear model
双线性模型
1.
Arming at a concrete bilinear model,under the condition of immaturity prior knowledge,a method based on the genetic algorithm design and the dynamic optimized fuzzy controller was studied.
针对一个具体双线性模型,在先验知识不完备的情况下,采用分步优化法研究了基于遗传算法设计和动态优化模糊控制器的方法。
2.
The result shows that the bilinear-RO model is better than the bilinear model for simulating the hytseresis energ.
本文首先介绍了作者所开发的铅粘弹性阻尼器的构造与性能，并根据铅弹性阻尼器的试验滞回曲线，采用双线性模型和双线性－RO模型来描述其力学性能，最后根据试验结果进行两种模型的对比分析。
3.
The algorithm of optimal control for continuous time nonlinear dynamic systems, which is called the dynamic integrated system optimization and parameter estimation (DISOPE), was proposed according to the differences between real system and it represented bilinear model.
在模型与实际存在差异的情况下 ,通过求解修正的基于双线性模型的优化问题和参数估计问题 ,给出了实际问题的最优解。
3) hyperbola model
双曲线模型
1.
The hyperbola model for autogenous expansion volume deformation of MgO concrete;
MgO微膨胀混凝土自生体积变形的双曲线模型
2.
On the basis of load transferring function method and interaction of pile and soil,proper hyperbola model was established to reflect the load transferring condition of pile-body and pile-end,and the load-sedimentation analytical solution under the condition of single layer foundation was deduced,and then was applied to the multi-layer foundation.
以荷载传递函数法为基础,考虑桩土共同作用,建立了合适的双曲线模型来反映桩侧和桩端的荷载传递情况,推导了单层地基条件下的荷载-沉降解析解,进而将其应用于成层地基。
3.
It is supposed that the constitutive relation of soil is the hyperbola model.
假定土体本构关系满足双曲线模型,把利用该模型得出的孔隙比e和有效应力σ′的双曲线关系应用到一维单层均质地基固结理论的研究中,通过假定土体的初始有效应力沿深度均匀分布和渗透系数的降低与压缩系数的减小成正比,推导出任意荷载作用下一维非线性固结理论的方程。
4) hyperbolic model
双曲线模型
1.
Analysis on hyperbolic model and exponential model for post-construction settlement of soft soil;
软土工后沉降双曲线模型与指数曲线模型分析
2.
Based on the long-term monitoring data of post-construction settlement of the loess subgrade of the Lanzhou-Wuwei Line Ⅱ,the quasi consolidation model was set up and contrasted with other models such as the Poisson model,index model, logarithm model and hyperbolic model.
利用兰武二线黄土路基工后沉降的长期观测数据,提出一种新的分析预测模型——似固结模型,并与泊松模型、指数模型、对数模型、双曲线模型的预测结果进行对比分析。
3.
Based on the layered foundation and the hyperbolic model,using Mindlin s equation and pile-soil interaction principle,a load-transfer modified method is presented.
基于层状地基采用双曲线模型为荷载传递函数,提出了用Mindlin解和桩土共同作用的联合方法对荷载传递法的进行修正,并计算分析了单桩承载特性。
5) bilinear time series model
双线性模型
1.
Application of bilinear time series model based on genetic algorithms in dam security monitoring forecast;
基于遗传算法的双线性模型在大坝安全监测预报中的应用
2.
Aiming at the time-variation and multi-factor influences of urban demand,the bilinear time series model has been adopted,and a method of creating the bilinear time series model that is applied to predict urban demand has been given.
针对城市用水的时变化性和受多因素影响的特点,引入双线性模型,并给出建立预测城市用水量的双线性模型方法。
3.
A simple and practical scheme is presented for developing a bilinear time series model (BM).
提出了建立双线性模型 ( BM)的一套简便实用的方案 。
6) Double line model
双射线模型
补充资料：AutoCad 教你绘制三爪卡盘模型,借用四视图来建模型
小弟写教程纯粹表达的是建模思路,供初学者参考.任何物体的建摸都需要思路,只有思路多,模型也就水到渠成.ok废话就不说了.建议使用1024X768分辨率
开始
先看下最终效果
第一步,如图所示将窗口分为四个视图
第二步,依次选择每个窗口,在分别输入各自己的视图
第三步,建立ucs重新建立世界坐标体系,捕捉三点来确定各自的ucs如图
第四步,初步大致建立基本模型.可以在主视图建立两个不同的圆,在用ext拉升,在用差集运算.如图:
第五步:关键一步,在此的我思路是.先画出卡爪的基本投影,在把他进行面域,在进行拉升高度分别是10,20,30曾t形状.如图:
第六步:画出螺栓的初步形状.如图
第七步:利用ext拉升圆,在拉升内六边形.注意拉升六边行时方向与拉升圆的方向是相反的.
之后在利用差集运算
第八步:将所得内螺栓模型分别复制到卡爪上,在利用三个视图调到与卡爪的中心对称.效果如图红色的是螺栓,最后是差集
第九步:阵列
第10步.模型就完成了
来一张利用矢量处理的图片
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条