Feedrate planning of continuous micro - line ' s start and end points are discussed , and the constraining conditions , including the machine ' s acceleration and deceleration capability , allowable error of corner machining , maximum acceleration and dynamical behavior of the machine , are established 。 摘要针对连续小直线段高速高精插补算法中起始点和终止点的速度规划，建立了包含机床加减速性能、转接处误差控制、最大加速度以及机床负载功率等的速度约束条件。
4 . choosing the reasonable deflection curve function . according to the energy method and the constrained condition of column end of the steel arch gate , the article presents a practical calculating formula for the stability of the main frame structure of the steel arch gate 选择合理的挠曲线函数(试解函数) ，根据能量法及弧门柱端约束条件，提出弧形钢闸门主框架(平面钢框架)稳定性计算的实用解析计算公式，并根据影响弧门主框架稳定性的因素对该公式进行修正。
A new method was given out in this paper , which is based on the singular value decomposition of the balance matrix of truss , followed by the method of optimization under linear constrained condition . an analysis program for this method was developed . the rightness o f t his method w as proven by the analysis and verify of engineering example 本文从桁架理论的奇异值分解出发，结合有约束线性优化方法，提出了解决这一问题的另一途径，编制了相应的分析程序，经过算例分析与验证，证明了该方法的正确性。
3 a novel recursive least - square ( rls ) blind space - time receiver algorithm based on the constrained condition , which can completely avoid the matrix inversion introduced into by constraints ( comparing with the normal rls ) , is proposed for multi - path slow fading cdma channels . the computational complexity of this method is not only lower than that of the normal rls , but also lower than that of both lms and ls blind space - time receiver methods that are realized based on the rosen ' s gradient projection . and the speed of convergence of the presented rls blind space - time receiver algorithm is better than that of both lms and ls blind space - time receiver methods 3 、针对多径慢衰落信道下ds - cdma盲空时接收机中线性约束二次规划问题提出一种新的递归最小二乘算法，该算法完全避免因约束而引进的矩阵求逆运算(相对于常规的递归最小二乘算法) ，不但运算量比常规的要低，而且比基于rosen梯度投影实现的最小均方( lms )与最小二乘盲空时接收机算法还低，且收敛速度比基于rosen梯度投影实现的最小均方( lms )与最小二乘盲空时多用户检测都好，将提出的新的递归最小二乘算法与提出的数据选择方案结合起来可以进一步降低其运算量，具有很大的实用价值，最后通过仿真实验进一步分析了其性能。
With the first method , multi - degree reduction can be executed at one time and certain continuity conditions can be satisfied ; by relaxation of constrained conditions , great improvement on the lpm of literature [ 30 ] can be obtained when interval rational bezier curves are degenerated to interval bezier curves . explicit computation formulas are presented when only one or two degrees reductions are required in the second method , and upper bounds for their errors are estimated 前者可一次性降多阶，且能满足一定的连续性要求，通过约束条件的放松，本文的算法较文献[ 30 ]的lpm法有更好的逼近；后者则给出了降一、二阶时的显式计算公式和误差上界估计式，且逼近精度比前者更高。
Based on the representation of interval rational bezier curves and surfaces and by a serial of mathematical transformation , the degree reductions of them are converted to those of polynomials with upper bounds , then several algorithms are presented , with linear programming and optimal approximation methods . by relaxation of some constrained conditions , approximation effects of some of them are further improved 根据区间有理bezier曲线、曲面的特点，通过一系列数学变换，将其降阶问题转化为多项式的保上界降阶逼近，再应用线性规划和最优逼近方法求解，给出几种逼近算法，并探讨通过约束不等式的松弛，进一步改进逼近效果。
The evolution laws of structural weight , the best optimum fitness , average fitness , maximum nodal stress and displacement with increasing generations are discussed . and multi - result fact of the topology optimization can be obtained by ga - fem . the research results in this thesis show that the developed method is successful in the topology optimization for 2d continuum structures under multi - load and multi - constrain conditions 上述工作表明，本文ga ? fem可以实现多载荷、多约束条件下平面连续结构拓扑优化，与eso等优化方法获得的优化结果相比，本文的优化结果不存在单元铰接和不连续单元，优化结构多样，质量更小，效果更优。
Furthermore , an approach of one destination to another is studied and a mathematical model and corresponding algorithm to solve the problem of qos routing is given , in which semidefinite programming is used . the basic problem of qos routing is an optimal problem satisfying multi - constrained conditions from a source node to one destination 此外，本论文还研究了点到点的多路路由选择问题，并给出了一种求解qos路由问题的数学模型及算法，用半定规划的方法进行了求解。
A novel routing protocol for ad hoc network - dsarp ( delay sensitive adaptive routing protocol ) is presented in this paper . according to dsarp , the reliable route for delay sensitive traffic can be supplied and the route can be selected based on the constrained condition - - " the shortest route and the lowest average delay " . therefore , the " hotspot " on the shortest path can be avoided 因此dsarp是在保持最短路径的约束条件下，增加了“平西安电子科技大学博士学位论文:移动adhoc网络关键技术研究均最短时延”的约束条件，从而不仅可以为实时业务(即时延敏感的业务)提供可靠的路由，同时还能根据网络节点当前的业务流量，动态的选择最佳路径，降低了网络的平均时延，是一种新型的有qos保证的路由协议。
This paper effectively deals with water inflow for excavated and cast - in - place pile under water with the constrained condition and strata of large water content during the course of forming hole and casting pile by using triple tubes directional jet as waterproof curtain , to decrease the compression for river channel , and ensure safety and quality in the phase of construction 摘要针对水中施工挖孔桩，条件受到限制、地层中含水量较大，为尽可能避免造成对河道的占用与影响，采用三重管定喷技术做止水帷幕，有效地解决了成孔成桩过程中涌水等问题，保证了工程施工的安全与质量。
