CRB

Research & Practice of Knowledge Component Based on CRB

基于事例推理的知识构件的研究与实践

There exists some problems on the parameter setting for this CRB algorithm .

该算法在参数设置上还不够明确。

The CRB commodity index is nearly up by one third from the low in2009 .

CRB商品指数差不多从2009年的低位上涨近三分之一。

CRB ( culture recreation business ) followed the changing steps of Hankou social economy structure .

伴随着汉口社会经济结构的变迁，文化娱乐业也在这种社会的变迁、冲突中开始了由传统到近代的转型。

Indeed , the CRB raw industrial commodity price index recently reached its highest level since April .

美国商品研究局（CRB）工业原材料大宗商品价格指数，近期达到了自去年4月以来的最高水平。

Meanwhile , the CRB commodity index is up 4 % year-to-date .

同时，路透商品研究局（CRB）商品价格指数年初以来已经上涨了4%。

Differential Correction for Spot Parameters and the Photometric Solution of the RS CVn System RT CrB

食双星RTCrB测光畸变波的黑子模拟及黑子参数的微分改正解

Broad measures of inflation , such as CRB prices , continue to make higher lows as stock prices decline .

随着股市下跌，CRB商品价格指数等广义通胀指标的最低点正在不断上升。

Numerical results show that the estimator bears high precision , good robust to general array error and the performance close to the CRB .

计算机仿真表明了此方法估计精度高，对阵列误差鲁棒性强，并且各项性能都接近于CRB。

The obtained result is different from the CRB for harmonic signals , which is widely used by most LDA engineers today .

得到了不同于目前LDA工作者广为使用的基于纯频谐波信号的分析结果。

Using CRB , the capacity and ability of tax case analysis system were greatly improved , and economic benefit and social benefit were brought in practical application .

利用基于范例推理技术，大大提高了系统的智能性和实际功能，在实际应用中产生了较好的经济效益和社会效益。

Excluding the volatile period of 2008-09 during the financial crisis , the fall in the CRB index would be a record .

若刨去2008-09年金融危机期间的动荡，CRB指数这一跌幅将是创纪录的。

Since August , the CRB is down 11 per cent , while the MSCI World is up 21 per cent .

自去年8月以来，CRB指数下跌了11%，而摩根士丹利资本国际全球指数则上涨了21%。

Zinc and aluminium have helped lead the CRB Base Metals index up 12 per cent this year , its best performance in a decade .

在锌和铝的带动下，CRB贱金属指数（CRBBaseMetalsindex）今年攀升了12%，创10年来最佳表现。

The mathematic model of the CRB is set up in this paper and the main parameters of the steering mechanism is determined by the calculation and analyse .

本文给出了可控径向转向架的数学模型，并通过计算和分析确定了可控径向转向架径向机构的主要参数。

According to the probability theory , the mean square error of estimated frequency can achieve the Cramer Rao Bound ( CRB ) .

根据概率论的知识可知，频率估计算法的均方误差可以达到CramerRaoBound（CRB界）。

On the macroscopic view of Chinese modernization , the explanation and value of the course of modernization of Hankou CRB is renewed .

在中国近代化的宏观视野下，汉口文化娱乐业的近代化进程被赋予了全新的解释和价值意义。

Then we give the Cramer-Rao Bound ( CRB ) of semi-blind channel estimation , and last judging its channel estimation efficiency .

最后推导了半盲信道估计的Cramer&Rao界（CRB），并利用CRB对信道估计方法进行了性能评价。

The theoretical analyses and simulations show that the proposed estimator outperforms the existing autocorrelation-based estimators and approaches the CRB .

通过理论分析和仿真验证了该算法的性能逼近CRB界，且优于基于时域自相关函数的算法。

It was proved that the CRB under the linear constraint and the quadratic constraint was the same for the blind channel estimation .

在推导盲信道估计的CRB时，证明了线性约束和二次约束两种情况下的CRB是一致的。

The Cramer-Rao Bound ( CRB ) is used to evaluate the accuracy of the estimated directions of arrival and polarization angles .

用克拉美-劳限（CRB）来衡量信号到达角和极化角的估计精度；

But commodities have provided false price signals this year , with the CRB index falling 6.3 per cent in March only to rebound strongly .

不过，大宗商品今年提供过虚假的价格信号：crb指数3月份曾下跌6.3%，但此后强劲反弹。

Simulations show that the Cramer-Rao bound ( CRB ) can be attained by the proposed methods even at low signal-to-noise ratio ( SNR ) .

仿真实验表明三种方法的估计性能在较低信噪比时达到Cramer-Rao界（CRB）。

The agricultural rally , coupled with stronger oil and metals prices , propelled the reuters-jefferies CRB commodities index to a two-year high .

农产品价格上扬，再加上石油和金属价格上涨，促使路透/杰佛瑞大宗商品期货价格指数（reuters-jefferiescrb）升至两年高点。

On the Basis of the combination of the experience and the manual , it suggested a intelligent fault diagnosis system , which is given priority to CRB and fault tree analysis .

在结合了手册以及经验的基础上，提出基于案例推理为主，故障树的分析为辅的智能故障诊断系统。

Alternating projection of maximum likelihood algorithm was recognized as an important method of DOA estimation because of its good statistical approximation to CRB and a modest computational complexity .

交替投影（AP）的极大似然算法由于其最接近CR下界的良好似然估计性能和适当的计算量受到人们的重视。

This time , government bonds are in a bull market with yields at multi-decade lows , and the CRB commodities index is at 2006 levels .

而这一次，政府债券处于牛市，收益率位于几十年来低点，而crb大宗商品指数仍徘徊在2006年水平。

Commodities ended the month up 14 per cent , the biggest monthly jump since July 1974 , according to the leading Reuters / Jefferies CRB index .

领先的路透/杰弗里商品研究局指数（Reuters/JefferiesCRB）显示，大宗商品价格本月累计上涨14%，为1974年7月以来最大月度涨幅。

Even after the recent sell-off , the CRB commodity futures index remains about 72 per cent above its 2009 lows and 14 per cent higher than its average since 2006 .

即便在最近价格出现回落之后，路透商品研究局指数（CRB）仍较2009年低点高出约72%，较自2006年以来的平均水平高出14%。

It is demonstrated that ML estimating error can converge to CRB quickly with increasing synthetic aperture length and Signal to Noise Ratio ( SNR ), but a threshold effect exists .

研究表明，随着合成孔径长度和信噪比的增加，ML估计误差可以很快地收敛于CRB，但存在阈值效应。