Results 51 to 60 of about 7,473 (165)
Jianzhu Gangjiegou Jinzhan, 2013 为了考察国产Q460高强钢焊接H形柱的轴心受压力学性能,对6个已有焊接H形柱的轴心受压试验进行了数值分析。数值分析采用作者编制的数值积分法电算程序和通用有限元软件ANSYS。以考虑了实测初始挠度、初始偏心及简化残余应力分布的数值模型,计算Q460高强钢焊接H形柱轴心受压的极限承载力与荷载-挠度曲线。发现数值积分法与有限单元法所计算试件的荷载-挠度曲线基本重合。为了验证数值模型的准确性,将数值分析结果与已有试验结果进行对比;并通过对比简化残余应力分布模型与实测残余应力分布对试件极限承载力、荷载 ...
王彦博 +3 more
doaj
Study of the Pricing for the Chinese Convertible Bonds [PDF]
, 2007 自从2006年5月份股权分置改革正式启动以来，经过一年多的努力，中国股票市场股权分置改革基本完成。股权分置改革解决了制约我国可转债市场发展的最大障碍，我国可转债市场将进入高速发展期。国内的可转债定价实证研究大都是在股权分置的环境下进行的，在全流通背景下，研究适用于新环境的可转债定价模型，具有非常重要的意义。 本文首先阐述了可转换债券的概念、基本要素以及国内外可转债市场发展的概况，然后介绍可转债定价的基础理论、国外定价理论的发展历程和国内可转债理论研究的成果。在对各种模型进行分析比较的基础上 ...
洪锐
core
Policy Studies Journal, Volume 53, Issue 3, Page 701-722, August 2025.Abstract Despite the reality that advocates frequently expend significant resources to pass symbolic policies, this policy design has often been neglected by policy studies scholarship. We combine policy design and policy feedback theory to examine this oft overlooked policy design in practice using the case of California's human right to water law ...
Jenny Linder Rempel +1 more
wiley +1 more source
Dianci bileiqi, 1990 提出了氧化锌电阻片模拟的原则,介绍了各种模拟方法并进行评述,着重阐述用同种配方、不同配方的氧化锌电阻片（简称模拟片）去模拟实际运行的氧化锌电阻片（简称原型片）的方法、步骤,模拟片尺寸的选择及等价条件,实验验证了模拟的正确性。
文远芳
doaj
Jianzhu Gangjiegou Jinzhan, 2021 传统的特高压输电塔塔腿设计是将塔腿结构简化为平面桁架体系进行受力分析。考虑了节点转动刚度对塔腿结构的影响,建立了半刚性连接节点的输电塔塔腿ANSYS模型。进行了平面与空间塔腿模型在不同节点转动刚度下的荷载-位移全过程分析和线刚度比的影响分析,并引入铰接和刚接模型进行对比研究。研究结果表明,节点转动刚度在很大程度上影响塔腿结构稳定极限承载力的大小,主斜材线刚度比会影响节点转动刚度的表达,且两个影响因子在平面和空间模型下都具有不同的变化规律,在用传统平面模型简化计算时应予以注意 ...
李正良, 韩宜航, 刘超, 张贵祥
doaj
Dynamic Modeling and Simulation of FCCU Fractionator [PDF]
, 2005 FCCU主分馏塔全塔仿真系统研究摘要本文在综合考虑了塔板效率、物料衡算、能量衡算、组分衡算、相平衡方程以及塔板水力学方程的基础之上，建立了包括附属设备在内的催化裂化主分馏塔严格机理动态模型。模型由数百个非线性微分方程和代数方程组成，为了满足工业实时计算的要求，本文以一个实际的分馏塔为具体对象，采用房室法和虚拟组分法来简化，得到一个只有6等效塔段、4虚拟组分的简化模型，并归纳了主状态变量状态方程的一般描述方式。为了解决动态模拟的积分初值问题和准确地估计代数关联式中一些重要参数的值 ...
吴松涛
core
Internal force calculation of double row anti-slide pile structure based on finite difference method [PDF]
To develop an efficient internal force calculation model for double row anti-slide piles with connecting beams, the finite difference method was used to calculate the internal force of all piles at the load section and embedded end of double row piles ...
Fanfan GAO +3 more
core +1 more source
Policy instruments attitudes and support for government responses against Covid‐19
Review of Policy Research, Volume 42, Issue 4, Page 982-1007, July 2025.Abstract An individual's political attitudes have been documented as the most important predictor of acceptance of government measures against the COVID‐19 pandemic. Their effect, however, is somewhat unclear and cannot be reduced to one dimension. In this article, we test whether general attitudes toward policy instruments might, together with left ...
Arnošt Veselý +2 more
wiley +1 more source
Integrative Conservation, Volume 4, Issue 2, Page 254-267, June 2025.Our research demonstrates that in mirroring prevailing human biases towards different insect groups, LLM chatbots oversimplify insect diversity by predominantly restricting “bees” to honeybees and “wasps” to yellowjackets, neglecting the majority of biodiversity that includes wild bees and parasitoid wasps, while also favouring Nearctic species in ...
Marina Moser +2 more
wiley +1 more source