查询词典 criterions

The reconstruction problem is ill-posed, so two optimal criterions, the least module and the smoothness criterion base on Tikhonov regularization technique, are introduced into reconstruction algorithm. Many regularization parameters choice strategies are investigated, and the TPA(Two—Parameter Algorithm) strategy which is based on the Morozov discrepancy principles, is implemented in two regularization reconstruction algorithms.Numerical experiment results show that the nonnegative and smoothness constraint condition can overcome the difficulty of iteration semiconvergent, preconditioned technique can improve convergence rate and reconstruction accuracy, smoothness regularization criterion can meliorate ill-posed problem of reconstruction and enhance iteration stability, and the TPA is an effective strategy of regularization parameters choice.

数值试验表明：在共轭梯度法中引入非负约束和光滑约束改善了迭代的"半收敛"性，非负约束保证了解的非负性，光滑约束抑制了重建解的振荡现象，约束算法的重建精度与无约束算法相比大幅度提高；在约束共轭梯度重建算法中引入预优技术，可以加快算法的收敛速度，提高迭代的稳定性和重建精度；引入光滑准则的正则化技术可以有效改善图像重建问题的不适定性，加快迭代的收敛速度，提高迭代的稳定性和图像重建质量，计算正则参数的TPA算法在闪光照相图像重建中是有效的。

Therefore, the regulations and criterions for the mineral nomenclature receive more and more attentions.

因此，矿物命名的标准和规则问题也越来越为矿物学家所重视。

This paper discusses the importance of the equipments in calibration traceability chain , introduces normal calibration methods , and proposes some suggestions about standardizing test methods and unitizing criterions .

本文依据专用测试设备的特点，论述了专用测试设备在量值溯源链中的位置及作用，介绍了常用的校准方法，并结合实际工作提出了规范测试方法和统一标准规范等建议。

Criterions of partial stable matrix and normal form of partial positive definete matrix are given, some conditions of solvability and uniqueness of Lyapunov matrix equation are discussed.

给出了部分稳定矩阵的几种判据与部分位正定矩阵的标准型，研究了矩阵方程可解性、唯一性的几种条件，提出一些可供进一步研究的问题。

The failure criterions of principal stress, octahedral stress and strain space are established.

建立了主应力、八面体应力和应变空间的混凝土破坏准则。

In order to get the criterions of on-line monitoring, the progress mode of fault is analyzed. For the different mode, the warning or pre-warning method is also discussed.

为提出在线监测判据的生成策略，分析了在线监测中故障数据的发展模式，且对不同故障发展模式的报警或预警策略进行了讨论。

Then the parameter group and identifmbility criterions were discussed. The identification algorithm based on the Simulated Annealing-Simplex Shape algorithm was proposed.

对基于静力位移结构识别问题的参数分组及可辨识性标准进行了讨论，建立了基于模拟退火-单纯形的完全非线性识别算法。

By means of experimental research on every criterion and its test process in the existing standard of industrial APP,some problems and shortcomings in the standard are found,for example,low criterions in phosphorus pentoxide content,average polymerization degree and granularity,imperfect test means in nitrogen content,average polymerization degree,and so on.

通过对工业聚磷酸铵行业标准中各项指标和检验方法的实验研究，发现标准中存在一些问题和不足，如五氧化二磷含量、平均聚合度、粒度等的指标要求低及氮含量和平均聚合度的检验方法不理想等。

Because of anonymity, people can freewheelingly personate new roles that are widely different from real life, the sanction of traditional criterions have weakened to nothing. Internet communication.

匿名性使得人们在网络空间可以随心所欲的扮演与现实生活中迥然不同的新角色，传统规范的约束力几乎减弱到无。

Popper have different law criterions in scientific law and historical law is a serious limitation of his idea.

波普在自然规律和历史规律上持有的双重规律标准是他思想体系的一个严重的缺陷。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。