查询词典 period matrix

In this paper, fuzzy theory, Markov chain and RFM model are integrated to evaluate customer lifetime values. This approach calculates the profit contribution of customers in every purchasing situation. Firstly, customer purchasing state is updated contiguously by fuzzy theory and RFM model with transition matrix which represents the probabilities among purchasing states. Then the profit contribution of each period is computed by using revenue and cost data. Finally, the profit contribution of each customer is accumulated through some discounting consideration. This will construct the final customer lifetime values.

本研究结合模糊理论、马可夫链、和RFM(recency， frequency， monetary； RFM)模式，配合折现模式来计算顾客终身价值，其中模糊理论及RFM模型定义顾客之购买状态，马可夫链则推算顾客在每期购买状态改变的机率，然后推估出顾客在每期交易的转换机率，再结合产品的收益与成本资料，算出顾客在各期对公司的利润贡献，最后将各期的利润贡献折现加总，计算出各种购买状况下的顾客价值，利用此顾客价值就可指出哪些是对企业有利的顾客。

We treat the superconductivity electron as Brownian motion particle in period potential, by using matrix continued fraction method. We solve the corresponding Fokker-Planck equation of electron and obtain the Voltage-Current Characteristics of Josephson Junctions with thermal fluctuations.

我们将超导电子视作在其位相形成的周期势场中作布朗运动，并利用矩阵连分法求解相应的Fokker--Planck方程，得到Josephson结在热涨落存在时的Ⅰ-Ⅴ特性曲线，计算结果与实验相符合。

The works of this period are full of painting language experiments in form, space and material, and we see sparks of what would later form his language matrix, but overall, the Chen Yufei of the '80's was a lonely metaphysicist, focused on using the four-cornered world of painting to extract basic imagery and forms from his daily life and spirit. His pictures had a very strong design feel.

这一时期的作品在造型、空间、材料等绘画语言上有着各种实验，闪现出了他其后的一些基本语言与母题，但总体而言，80年代的陈宇飞属于一个孤独的形而上主义者，专注于用绘画这一四边形的世界从他的日常生活及精神生活中抽离出一些基本的意象和形式，画面有很强的设计感。

Hamilton discovered the quaternion ,to the middle period of last century,the application of the quaternion and the quaternion matrix are discovered widely in geostatics,the theory of ped-top using, strap-down inertial ,naviation, enginery and organ,robot technology and artificial satellite attitude control,and so on.

R。 Hamilton发现四元数到上世纪中叶，四元数和四元数矩阵方法在刚体动力学、陀螺使用理论、捷联惯性导航、机器与机构、机器人技术、人造卫星姿态控制等领域应用非常广泛。

Methods:The mathematical model created by Kipper,and the regression coefficients of age,period and cohort were calculated by using triangle matrix.

采用Kupper数学模型，用矩阵的三角分解法求解，对三因素的各个亚层成分效应大小的定量参数估计。结果：1970～1994年栖霞市胃癌死亡率前10年上升后15年呈平稳下降趋势。

The sampling period is from 2000 to 2002. Matrix analysis and hypothesis tests are utilized.

样本期间为2000年至2002年，研究方法采用矩阵分析以及假说检定。

The results of PMD value by numerical simulation are similar to that estimated by Jones matrix when differential group delay is less than a bit period.

将模拟得到的偏振模色散大小与从琼斯矩阵理论中计算的结果进行比较，结果表明，采用该模型的模拟结果与理论计算值在差分群时延为一个比特周期内符合较好。

Biomimetic laminated composite was fabricated by mimicking the cyclical matrix control process to form the highly structured Mollusca nacre, the structure and growth period of the biomimetic laminated obtained was similar to Mollusca nacre, it can be considered as a model for the research of the formation of Mollusca nacre.

获得的该复合材料与珍珠的结构和生长周期与珍珠具有一定的相似性，为研究珍珠的形成过程提供了参考模型，并通过研究珍珠的形成过程，掌握和了解珍珠形成的各种影响因素。

An input phase voltage is divided into a main range and a transition range in which new P, M, N conditions and PM, NP, MN transition conditions are defined, some null vector is selected and the condition combination sequence of bidirectional power switches are adjusted in each modulation period to realize the safe, reliable and rapid commutation and the stable operation of the matrix converter.

本发明属于矩阵变换器控制技术，为一种用于矩阵变换器的控制方法，通过把输入相电压划分为主区间和过渡区间、在过渡区间定义新的P、M、N状态和PM、NP、MN暂态以及在每个调制周期内选择特定的零矢量并调整双向功率开关状态组合顺序，实现矩阵变换器安全、可靠、快速换流和稳定运行。

At last, we show two algorithms to compute the period index of fuzzy matrix.

本文在最后给出了模糊矩阵周期指数的两个算法。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。