查询词典 iterative

The traditional box-counting algorithm is based on the grid document and has some serious shortcomings, such as the distortion of the image being enlarged, the trivialness of the process and the finite of the iterative degree, etc.

实践表明，该算法有3个优点：（1）图像不会随着放大缩小而失真；（2）可完全进行计算机操作，且简单可靠；（3）从某种意义上讲，由于迭代的次数可以是无穷的，所以能非常精确地确定图形的标度空间，并可获得精确的分维值。

Fractal theory quantifies these phenomena mainly by ascertaining their fractal dimensions.Box-counting algorithm is the one most practical and also most frequently adopted method.The traditional box-counting algorithm is based on the grid document and has some serious shortcomings,such as the distortion of the image being enlarged,the trivialness of the process and the finite of the iterative degree,etc.The vector box counting algorithm developed in this paper takes vector document as the carrier and has three advantages.

传统的计盒算法是基于栅格文件的方法，由于其存在图像放大后失真、过程繁琐和迭代次数有限等缺陷，因此为了准确简单方便地进行分维计算，开发了一种以矢量文件为载体的矢量计盒算法，并详细阐述了这种算法的数据结构、处理流程和主要函数，同时以Koch曲线、骨肿瘤边界及水系证明了矢量计盒算法的准确性和优越性。

Based on volume model for the tuffaceous sands, educed the contentof shaly and tuffaceous parts with the optimization methods for logging interpretation, in theprocess of which the calculative method was changed, so that iterative speed was accelerated;Compared with the slice analysis, the result calculated had the similar value and trend.

在建立凝灰质砂岩体积模型的基础上，应用最优化测井解释方法求取地层中泥质及凝灰质成分的含量，求解过程中改进计算方法，加快了迭代速度；处理结果与薄片分析资料对比，各成分含量的数值和大小趋势基本相符。

The model is as follows: WhereE = equity Rt = net annual cash flow in period t It = interest on mortgage in period t At = amortization of mortgage in period t Tt = income tax in period t Pn = selling price at end of period t = n GT = capital gains tax payable upon sale of property in year t = n UM = unamortized mortgage in year t = n n = investment horizon, in years from the present r = internal rate of returnThis equation can be solved by an iterative procedure of successive approxi mations to "r".

模范如下是：地方E=公平Rt=网年报现金流转在朝派时期t它=权益右手击球员的左后方场地抵押在朝派时期t阿特=amortization 的抵押在朝派时期t Tt=所得税在朝派时期t Pn=卖出价格阿特时期末t=n GT=首府gains税收可以支付在上面销售的财产在朝派年t=n嗯=分期偿还抵押在朝派年t=n n=投资视界在几年中从指向r=内部器官回报率这个等式罐被解决在附近一重复的过程的连续approximations向&r&。

this paper analyses the basic principle of tpc,compares the error performance in the system which has been applied with tpc with the uncoded system,studies the influences which different block codes and iterative numbers to tpc decode performance.under the circumstances of different iteration numbers and block codes,experiment simulation is carried on.the simulation results indicate that introduction of tpc can get the code gain of 5~6 db.tpc decoding algorithm is simple,and doesn′t have the error floor,the complexity of its hardware implementation is smaller,it is a kind of practical channel coding method.

摘 要：在分析turbo 乘积码的基本编译码原理的基础上，比较了未编码与编码后系统的差错性能，研究了选取不同分量码、不同迭代次数对tpc译码性能的影响。在不同迭代次数与分量码情况下，进行了仿真实验。仿真实验表明，在相同的差错性能条件下，采用tpc码能带来5~6 db的编码增益。tpc译码算法简单，没有错误平层，硬件实现复杂度较小，是一种非常实用的信道编码方式。

Second, Unexpectable situation such as bad weather or apparatus problems will cause some other cases, for example, tidal level data cant be measured completely or contains great errors. Aim at these cases, according to multiple harmonic analysis method, this paper presents a new method for the iterative harmonic analysis of tides based on the least square method of continuous function, as well as the condition when this method converges.

第二、针对恶劣天气或仪器等意外情况导致潮位数据缺测或者具有重大误差等情况发生时，根据多次调和分析方法的思想，给出了基于连续函数最小二乘法的潮汐迭代调和分析方法，给出了方法收敛的条件。

Shim current calculation When shim coils are excited by appropriate current, they can generate correcting magnetic field to compensate the imaging magnetic field unhomogeneity. Based on the indirect calculation method, we proposed a novel iterative optimization algorithm to calculate shim current. Because there is a direct proportion relationship between FID signal and magnetic field homogeneity, we use the intensity of FID signal as feedback information to the calculation. Shim current can be worked out in less than 3 minutes. This satisfied the requirement that active shimming should be performed in real time.

5匀场电流计算对匀场线圈施加适当的电流后才能产生校正磁场消除成像磁场的非均匀分量，本文在匀场电流间接计算方法的基础上，利用磁共振成像原理中磁场均匀性与系统FID信号强度成正比的关系提出了一种电流迭代优化算法，将系统FID信号强度的变化作为反馈信息，能够快速计算出匀场电流对成像磁场进行补偿校正，平均耗时不到三分钟，满足磁共振成像系统对有源匀场的实时性要求。

Shim current calculationWhen shim coils are excited by appropriate current, they can generate correcting magnetic field to compensate the imaging magnetic field unhomogeneity. Based on the indirect calculation method, we proposed a novel iterative optimization algorithm to calculate shim current. Because there is a direct proportion relationship between FID signal and magnetic field homogeneity, we use the intensity of FID signal as feedback information to the calculation. Shim current can be worked out in less than 3 minutes. This satisfied the requirement that active shimming should be performed in real time.

5匀场电流计算对匀场线圈施加适当的电流后才能产生校正磁场消除成像磁场的非均匀分量，本文在匀场电流间接计算方法的基础上，利用磁共振成像原理中磁场均匀性与系统FID信号强度成正比的关系提出了一种电流迭代优化算法，将系统FID信号强度的变化作为反馈信息，能够快速计算出匀场电流对成像磁场进行补偿校正，平均耗时不到三分钟，满足磁共振成像系统对有源匀场的实时性要求。

A character-codes model based pattern recognition method by using amplitude data of targets frequency response is proposed after the establishment of high frequency response equation of radar targets. The method uses the same unvariant character-codes to express the same target of different angles and uses sequential separating of regions of target's reference variables to obtain multiple coding vectors of all regions for every target. The category and pose of target can be determined after a two-staged classification processing such as coding processing of target range profile data and errors correcting processing of coded data. The two-stage classification results are used to target identification as posterior hypothesis to be tested by sufficient convincing and necessary convincing. The character-codes model based pattern recognition method is also adaptive to variation of target angles and controllable in error probability. Time-consuming and complicated iterative computation is not necessary in the train process of pattern recognition.

首先建立了雷达目标的高频频率响应方程，这种方程将目标多散射中心理论与目标局部谐振理论有机地结合起来；进而提出了目标多频响应结构成像方法，这种方法将瑞利区频率响应或谐振区频率响应曲线的不同部位用各种不同的近似方法去逼近，通过特征谱估计方法将目标的局部频响特征与宽带距离响应特征结合起来；然后提出了一种基于姿态角变化区域的序贯划分与多模匹配的特征编码识别方法，这种方法具有能适应目标姿态角的变化以及能控制识别的差错概率α等优点，在目标识别时只需要目标在少数有限个频率激励下的幅频响应数据。

A new iterative algorithm to compute the approximate solutions of the generalized mixed vari...

最后，给出了这个新算法所产生的迭代序列的收敛准则，还讨论了该领域中的一些已知结果。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。