Firstly , based on the classical theorem of limit analysis , the von mises yielding condition and finite element method technique , two common mathematical programs for the determination of the lower and upper bounds are built and solved by an iteration algorithm directly 首先，基于塑性极限载荷分析中的上下限定理和有限元离散技术，推导和给出了一般结构极限载荷上下限计算的数学规划的普遍格式和相应的积分数值计算公式。
In this study , we have analyzed the time - space variation characteristics of global cross - equatorial flow ( cef ) at the lower and upper rroposphere . especially for the monsoon region of the eastern hemisphere . the ncep / ncar reanalysis dataset used in this study are from 1958 to 1997 本文利用1958 1997年ncep / ncar逐月再分析资料，分析了全球各经度不同层次上越赤道气流( cef )的时空分布特征，尤其是东半球季风区夏季的越赤道气流。
It is more difficult to work out the all generalized hamming weight for the code , at present , the generalized hamming weights are worked out with some codes in the most of works , or some lower and upper bounds are given with the generalized hamming weights 由于求一个码的广义hamming重量是一项比较难的工作，目前国内外只求出了某一类码的全部广义hamming重量，但大多数文献只求出了某些码的(前几个)广义hamming重量，或给出广义hamming重量的一些上下界。
Theoretical analysis and simulation results demonstrate that asymmetries in lower and upper sidebands and imd magnitude variation depending on envelope frequency and junction temperature can appear , these results are in accordance with measurement results , and show that electrical and thermal memory effects exist 理论分析和仿真结果表明功率放大器上下边带不平衡和互调失真幅度依赖于包络频率和结温，结果和测量的结果是一致的，说明存在电和热记忆效应。
Therefore , drawing from the lower and upper limit designed height and steel limit destruction , the paper classifies the design destructive forms of bonded - strengthened beams into three categories ( i , ii , iii ) , and gets the relevant integrated formula for calculating flexural capacity and gives the relevant design example of engineering 由粘贴加固上、下限，引入钢筋的界限破坏，本文将粘贴加固受弯构件的设计破坏形态分为三类( 、 、类) ，并给出相应的承载力计算公式和各自的使用范围。
A real rough set space and the concepts of real lower and upper approximation corresponding to real - valued attributes is studied . a rhombus neighborhood for som is proposed , and the combination of som and rough sets theory is explored in the dissertation . according to the distance between the weight of winner node and the input vector in the real rough sets space , some new weights learning rules are defined 本文提出采用菱形邻域代替一般的方形邻域,可以减少待修正权重的数目;并利用实数粗糙空间的下、上近似集的精确概念划分自组织映射的输出结果,使得改进后的映射结果中各类样本点之间有明显的间隔,易于进行分类识别。
In this article , the author examines the reasons for this , including the fact that linux on non - x86 enables affordable , easy - to - do virtualization ; provides for better reliability , power consumption , and extended memory support ; covers the lower and upper ranges of machines , giving users options outside of the middle range ; revitalizes older hardware ; and drives innovation 在本文中，作者将研究这种现象的原因，其中包括这样一些事实：非x86平台上的linux支持支付得起的、容于实现的虚拟化；提供更好的可靠性、电力消耗和扩展的内存支持；覆盖的机器范围更广，为用户提供大范围的选择；让古老的硬件重焕青春；以及促进革新。
In this paper , we will more deeply research on the base of the works , the first part , we give the summarize for the condition and the significance . the second part , we give the preparation knowledge to the whole paper ; the third part , we research the lower and upper bound of the generalized hamming weights for the linear codes ; include d ( r , n , k ) bound , the finite sum representation of the lower and upper bound function of generalized hamming weights for linear codes , generalized griesmer bounds ; the 4 - th part , research the definition , the property of the r - th generalized weights for the non - linear codes and non - linear constant codes , and give the expression of the generalized weight of binary ( n , m , d ) non - linear codes ; the 5 - th part , research the weight hierarchy of linear codes and non - linear codes , for example , necessary condition and sufficient condition , the 6 - th part , we research the expression of the r - th generalized hamming weights of reseaval classes codes 本文在已有的基础之上作了进一步的探讨，第一章综述了广义hamming重量的现状和意义；第二章给出了全文的预备知识；第三章研究了线性码的广义hamming重量的一些上下界；包括d ( r , n , k )界，上下限函数有限和表达式，广义griesmer界；第四章讨论了非线性码及非线性等重码的广义hamming重量的定义、性质，给出了2元( n , m , d )非线性码的第r广义hamming重量的表达式；第五章研究了线性码、非线性码的重量谱系；第六章给出了几类码的广义hamming重量的表达式，这些码包括直和码( directsumcodes ) 、笛卡尔积码( cartesianproductcodes ) 、张量积码( tensorproductcodes ) 、延长hamming码。
This paper proposed some methods for finding out sure regions and ambiguous regions defined by lower and upper approximations in rough set theory . an applicable ending - criterion for semi - supervised back - propagation algorithm was proposed and a new rough classifier framework was studied , the assessment results show the effectiveness of the proposed criterion . a new classifier based on support vector machines was studied and applied 本文提出了几种划分样本边界区的方法:提出了一种应用于半监督bp算法的实用结束判据，并根据粗糙集理论，研究了一种新的粗糙分类机制，取得良好的效果；应用支持向量机理论，构造分类器并划分样本边界区；最后研究多个分类器集成的方法寻找样本边界区，同样提高了暂态稳定评估的可靠性
This paper makes the attempt to introduce the plastic limit analysis to the determination of the load carrying capacity of structures with defaults or / and cracks . common formulae for the determination of the lower and upper bounds of limit load are derived , then a successive iterative algorithm , based on the optimization and finite element method , to calculate the bounds is proposed , which could be applied to general structures 本文将塑性极限分析应用于含裂纹结构的极限承载能力的确定，研究和推导了一般含裂纹结构极限载荷的确定方法和普遍计算格式，提出了一种求解极限载荷的迭代算法，并就若干含裂纹结构进行了求解，给出了有意义的结论。
