查询词典 quadratic

Forming principle of cone quadratic curved line is analyzed and result is given.

结果通过空间不同情况下圆锥截交线的坐标变换，获得了圆锥截交线的真实特征。

In this paper, new classes of linear block codes over finite fields of the algebraicinteger ring of quadratic number fields Qd~(1/2 modulo irreducible elements with norm p or p~2 are presented. These codes can correct one error which takes from the cyclic subgroup of the multiplicative group of the finite fields. The results presented in this paper extend the corresponding results of previous papers.

在处理适用于二维信号的线性分组码时，我们考虑类数为1的有理数域二次扩域Qd~(1/2的代数整数环，利用范数为p或p~2的不可约元构造有限域，给出剩余类域的一组完全陪集代表元系，从而构造出一类有限域上的线性分组码，当错误取值于有限域乘法群的一个循环子群时，所得到的适用于二维信号的线性分组码可以纠单个错，推广了文[14-16]的结果。

For all primes , by reducing modulo on the cyclic -module, Rains constructed the quantum quadratic residue codes , each of which produces a code.

任取素数，Rains利用上的一个多项式构造出循环模，通过对循环模作摸运算构造出量子二次剩余码，这样的一个可构造出一个参数为的量子码。

In this study, for the complicated distribution of dose rate in time and space, considering the repair of the sub-death cells, the radionuclide decay law and exponential proliferation of clonogenic cells, the dose-response relationship is built based on the known linear-quadratic model, and the concept of tumor control probability is introduced into the therapy method. Furthermore, the concepts about "curable stage" and "critical time point" and the methods calculating the amount of radionuclide injected into tumor in clinical are proposed.

本课题针对这一方法中靶区复杂的剂量率时-空分布特点，以公认的"线性-二次模型"理论为基础，同时考虑亚致死性细胞修复、核素衰变规律和克隆原性细胞指数增殖，建立了适合这一治疗方法的具有时-空分布特点的剂量效应关系，并进一步将肿瘤控制概率的概念引入这一方法中，提出了"治愈期"及"临界时间点"的概念以及由此指导临床确定药物注射剂量的方法。

There have developed some technique to ensure the positive definiteness of the Hessian of the quadratic objective function.

对QP子问题的目标函数的Hessian阵的正定性研究已引起了许多学者的关注。

The quadratic function of wave equation was derived.

推导了波动方程的二次泛函形式。

The steepest descent method was applied in optimization to solve the quadratic matrix equation,and a new algorithm was given.

结合优化理论中最速下降法思想，给出一种新的算法解二次矩阵方程，并列出几个数值例子说明算法是可行的。

In the dissertation, a new quadratic architecture 2FBA was proposed. To minimize the area, we developed a deterministic array optimization algorithm. It, like simulated annealing algorithms, has the property of climbing out of local optimums.

本论文还提出了一个新的二次布图结构：2FBA，为了减小其布图面积，我们提出了一个确定性的阵列优化算法，此算法的结果和模拟退火算法的结果类似，具有绕开局部最优的能力，然而，它的计算时间比模拟退火算法少得多。

Sequential quadratic programming , penalty function method, trust domain method, constraint DFP .

对于约束最优化问题的研究一直是优化专家们研究的热门方向之一。

A linear-quadratic differential game model based on the theory of differential games in military field is constructed,and then,a solution for its open-loop equilibrium strategy is given and an application of the solution in an arms race is given.

以微分对策在军事领域中的应用为背景，建立一类线性二次型微分对策模型，讨论其开环均衡策略解法，将其运用到一个具体的两国军备竞赛的模型中。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。