curved bottom造句

• Curved bottom chord
  曲线形下弦杆
• The research information of the slab that has been used for forepassed decades is extremely few . there is a lack of the method of calculating load bearing capacity of slab with slightly curved bottom in our bridge criterion
  在过去的几十年中，微弯板的研究资料极少，我国桥梁规范中尚无微弯板的承载力的确定方法。
• Because it is simple to make manufacture slab with slightly curved bottom , and is economical to use steel , and is relatively great in aspect of load bearing potential capacity , the slab often has been used as braced arch and rigid - frame arch bridges " deck slab in 1970s and 1980s
  由于微弯板具有制作简单、用钢量省、承载潜力较大的优点，因而上世纪七、八十年代，在刚架拱桥、桁架拱桥中常用作桥面板。
• On the basis of the test and finite element analysis , and on the experience of exsting research payoffs , this paper advance the method of calculating load bearing capacity of slab with slightly curved bottom considering membrane effect of the slab , and deduce the corresponding formulas
  在试验和有限元分析的基础上，借鉴已有的研究成果，本文提出了考虑薄膜效应时确定微弯板承载力的方法，并推导出相应承载力计算公式。
• The mass of the slab have diseases in varying degrees by investigation , so the problem faced us is to strengthen and remake the slab . in addition , the slab will be used in underdeveloped region of our country . therefore , it is very important to evaluate the load bearing capacity of slab with slightly curved bottom
  微弯板在桥梁中使用已有三十多年，在调查中发现大多微弯板都存有不同程度的病害，也就面临着对旧桥微弯板的加固改造的问题；另外，在我国某些经济尚不发达地区的桥梁建设中仍在采用，因此，对微弯板的承载力的正确评定也显得十分重要。
• To evaluate load bearing capacity of slab with slightly curved bottom , and provide scientific basis for strengthening and remaking and designing the slab , this paper discuss the method of calculating load bearing capacity of slab with slightly curved bottom according to the ministry of communications " scientific research project , that is technique research of detection , evaluation and strengthening and its spread
  为了对其承载力做出较正确评价，并能为加固改造、设计提供科学依据，根据交通部《公路旧桥检测评定和加固技术研究及推广应用》科研项目的要求，本文对微弯板的承载力确定方法进行研究。
• In solving the helmholtz equation in the acoustical waveguides with a curved bottom , slow convergence may occurs when the linear local orthogonal transformation is adopted . in this paper , a class of nonlinear local orthogonal transformations ( nlot ) is proposed . it is an approach to improve the slow convergence mentioned above
  本文尝试通过在深度方向选取非线性局部正交变换，将曲底求解区域化为平坦求解区域，然后求解helmholtz方程的办法，来改善用线性(深度方向)局部正交变换时，步进求解时会出现的局部收敛慢的问题。