Based on the minimum potential energy principal , the influences of three loads , which are concentrated force , trapezoidal load and sinusoid load , over shear lag of cantilever single - box - single - cell box girder are deducted and discussed , and a conclusion is reached , which has some instructive significance for designer to determine the sectional dimension and reinforcing bars ; the bending normal stress changes greatly as considering the shear lag effect 以最小势能原理为基础，推导并讨论了3种形式的荷载：集中力、梯形荷载、正弦形荷载对悬臂单箱单室箱形梁剪力滞的影响，得出考虑剪力滞效应后弯曲法向应力有较大变化的结论，对设计人员确定截面尺寸、截面配筋具有一定的指导意义。
For a long time , people have owed time lag effect of financial innovation on diffusion and absorption of financial market in china to lack of absorptive capacity or competition in micro - market , and neglected the effect of institutional factors in a country of economic transition like china 摘要长期以来，对金融创新在中国金融市场扩散吸收中的时滞效应的认识往往归咎于微观市场主体缺乏吸收能力或竞争所致，而忽略了中国这样的转型经济国家所具有的制度性因素的影响。
This article reviews the movement of economic regulation , especially the price regulation in western developed countries and its reasons . then it analyzes the lag effect of regulation and discusses the risks and spillover of innovation . further , to illuminates the significance of innovation , we analyze the economic effects from some of aspects , such as economic growth , improvement of social welfare , the raise of consumption level , optimization of industrial structure and the development of enterprises 本文回顾了西方主要发达国家经济性规制特别是价格规制的发展变化及其原因,分析了规制的时滞效应;主要探讨了企业技术创新活动的风险性和外溢性,并从经济增长和社会福利改善、居民消费水平的提高、产业结构优化升级以及企业的生存和发展等方面分析了技术创新的经济效应,说明技术创新的重要意义。
In this paper , a generalized hybrid finite strip method is deduded for analyzing the shear lag effect in box girders . it has the advantage of the generalized finite strip method and hybrid stress element . shear lag effect in thin - walled box girder is analyzed with this method and stiffness matrix of generalized hybrid finite strip element is deduced . a calculating program for thin - walled box girder " s generalized hybrid finite strip method is compiled with fortran language and performed in visual fortran environment of pc computer . a typical example demonstrates that the proposed method has higher accuracy and efficiency , is suitable for analysis of shear lag effect in box girders 本文结合应力杂交元法和广义有限条法导出一种用来分析箱梁剪力滞效应的广义应力杂交有限条法，它兼有应力杂交元和有限条法的优点。运用这种方法对薄壁箱形梁的剪力滞效应进行了分析，推导出广义应力杂交有限条元的单元刚度矩阵，用fortran - 77语言编写薄壁箱形梁广义杂交有限条法程序( hfsbg . for )在visualfortran环境下运行。具体算例的数值结果表明：广义应力杂交有限条法用于计算箱形梁的应力分析具有很好的精度和效率，适合于分析箱形梁的剪力滞效应。
Based on the theory of thin - walled curved bar , reasonable hypothesized a third - ord parabolic curve , the paper adoptes variational method on energy , taking the coupled relationship of the effect of curvature radius , bend , torsion and shear - lag into consideration , establishes the elastic governing differential equation and boundary conditions for thin - walled curved box girders , which set the foundation of theoretical analysis of shear - lag effect in thin - walled curved box girders 摘要文章以薄壁曲杆理论为基础，合理地假设了三个剪力滞翘曲位移函数，应用能量变分法推导出考虑曲率半径影响、弯、扭、剪力滞耦合的曲线箱梁弹性控制微分方程及其边界条件，为薄壁大曲率箱梁剪滞效应建立了理论分析基础。
