In this essay the technique of the structure calculation and error adjustment measures used in bridge construction prefigurative deviation control was researched based on the construction control and monitor project of wuhan caidian han river bridge 本文主要结合蔡甸汉江公路大桥的施工监测监控项目，研究施工预拱度控制的结构计算和误差调整方法。
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Then on the basis of calculating result from the prefigurative deviation control structure calculation , " rational data forecast processing about error adjust in prefigurative deviation control was made by the prefigurative theory of bp neural network and corresponding program and software matlab6 . 1 . at last via the data comparison with the practical survey data draw a conclusion : it is feasible for the construction prefigurative deviation control and error adjust used in pc rigid frame bridges to use the calculation model and program brought forward in this paper 同时，在对预应力混凝土刚构桥施工过程线形预拱度控制的结构计算分析的基础上，利用bp神经网络的预测理论和相应的程序及软件包matlab6 . 1对预拱度控制中的误差调整进行了较好的预测处理，通过与实际施工数据及成桥后测量结果作分析比较，得到结论：运用本论文的计算模型和程序对预应力混凝土刚构桥预拱度控制过程进武汉理工大学硕士学位论文行结构分析和误差调整处理是可行。
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Existing calculation methods for burning surface do n ' t well agree with the experimental data with complicated grain . in order to eliminate the error , tests data are used to correct the prefigurative result generally , and it is impossible to calculate burning surface of grain with crack . debond and wtith changing burning rate of propellant 目前现有的固体装药燃面算法，在计算复杂装药燃面时仍有较大误差，为消除这种误差往往需要用试车结果给予修正；同时在计算含缺陷装药燃面和处理装药因批次燃速变化时的燃气加质更是束手无策。
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Like all the cottagers in blackmoor vale , tess was steeped in fancies and prefigurative superstitions ; she thought this an ill omen - the first she had noticed that day . the van travelled only so far as shaston , and there were several miles of pedestrian descent from that mountain town into the vale to marlott 像布莱克莫尔谷所有的村民一样，苔丝的头脑里充满了无稽的幻想，尽是相信预兆的迷信她心里想，被玫瑰花刺扎了，这不是一个好兆头这是那天她注意到的第一个预兆。
