The agreements with motorola include an investment by motorola in dvn and provide for product distribution , technology development and engineering services between the two companies , and are designed to accelerate the successful deployment of digital broadcasting solutions to cable operators in china 天地数码与摩托罗拉之协议包括了两家公司就产品分销与技术开发及工程服务之投资，旨在加快中国有线电视营运商对数码广播方案的普及应用。
The agreements with motorola include an investment by motorola in dvn and provide for product distribution , technology development and engineering services between the two companies , and are designed to accelerate the successful deployment of digital broadcasting solutions to cable operators in china 天地数码与摩托罗拉之协议包括了两家公司就产品分销与技术开发及工程服务之投资，旨在加快中国有线电视营运商对数码广播方案的普及应用。
The seismic responses behavior of cable - stayed cfst arch bridge under one dimension seismic excitation and two - dimension seismic excitation is studied by time history method . the influence of vertical seismic excitation to cable - stayed cfst arch bridge is discussed . finally the thesis appraises the anti - seismic reliability of cable - stayed cfst arch bridge 2 、应用动态时程方法对斜拉钢管混凝土拱桥在一维及二维地震荷载输入下的地震响应性能进行了分析,讨论了竖向地震分量对地震响应性能的影响,对斜拉钢管混凝土拱桥进行了抗震性能评价。
On the base of choosing proper model and designing route , it uses cad and probes into an efficient and easy design way to enhance design efficiency and shorten design periods . it brings in the way of multiple - objective optimization and gives proper optimization model and algorithm to get a comparative satisfying result . and it applies system simulation to cable crane design and gives the simulation model and arithmetic of the freight track 本文针对此问题，引入现代的设计方法：在选取合适的模型和设计路线的前提下，运用计算机辅助设计，研究探讨高效便捷的设计方法，大大的提高设计效率，缩短设计周期，节约成本；引入多目标优化的思想，提出合理的优化模型，给出了实现算法，得到了比较满意的结果；引入系统仿真的设计理念，给出了荷重轨迹的仿真模型实现算法和程序，对荷重轨迹进行了计算机仿真，提高了缆索起重机布置的效率和质量，提高了生产的安全性。
Abstract : cable - stayed is used to cable suspension , but cable force is calculated by manual , and only for less than 5 segments , and the prescion is poor . this paper puts forward “ zero moment method ” , which can not only calculate more segmental soupe force , but both temporary joint and fixed joint during construction . the mechanical concept is clear , and it is easy for calculating . it is fit for program , and the illustrations prove that the methods are right 文摘:斜拉扣挂在缆索吊装中经常运用，但扣索索力多采用手工计算，且多用于5段以内的吊装，计算复杂，精度低.本文提出“零弯矩法” ，可计算任意多段扣索索力，既可计算拱肋在施工过程中各节段临时铰接，又可计算各节段固结的情况，将两种连接方式统一成一种计算方法，力学概念清楚，计算简便，适宜程，文中最后用示例证实本方法的正确性
A new kind of theory and calculating method which is suitable to cable supported bridges was developed in this paper . cable element can include the structure ' s geometry nonlinearity and initial stress , virtual laminated element has high calculating efficiency and good precision . dimensions of lsctb was put forward based on conclusions of optimum analysis 推导了适合缆索承重桥梁的缆索单元；引入虚拟单元理论，提出适用于大跨缆索承重桥梁钢箱梁的一种新方法?虚拟层合板单元法，该单元具有计算效率高，可以模拟复杂结构并满足工程需要等诸多优越性。
So it is not enough if we only execute linear analysis to a cable - stayed bridge ; 2 ) when live loads are distributed to full span the effects of geometric nonlinear for the structure are smaller than to two side spans or mid - span only ; 3 ) linear analysis is enough to live loads since the difference between linear analysis and nonlinear analysis to the structure is relatively small under live loads ; 4 ) the effects of every geometric nonlinear element to decision final shape parameters are very little , and the results of linear and nonlinear are nearly equal ; 5 ) under construction the effects of geometric nonlinear to cable - stayed bridges must be considered 2 )活载作用下，加载方式不同，非线性的影响结果也不一样，其中按全桥满布方式进行加载时受几何非线性的影响最小。 3 )活载作用下，可以用线性分析的手段对活载进行近似计算，以便减少计算量。 4 )各非线性因素对结构最终形态确定参数的影响非常小，线性结果与非线性结果相差无几。
