灰色

The grey predicative control is a fully new control mode based grey system theory.

灰色预测控制是以灰色系统理论为依据的一种全新的控制模式。

Picture of life, the occasional gray add together, you do not presage the decline, it is important to extract the gray-green hope.

在生活的画卷中，偶尔抹上一道灰色，并不预示着你的沉沦，重要的是，能在灰色中提取绿色的希望。

According to the characteristics presented by armed helicopters during cruising or searching for ground targets, this paper has established the mean-square deviation stationary random model of helicopter tracks. It is an important method to decorrelate the measure noise by estimating the parameters of the color noise online. Kalman filtering and forecasting have been made with helicopter tracks. The simulated study has been carried out on helicopter tracks under the condition of color noise. It is very difficult to get an accurate and reliable prediction when the data is very limited. The paper make use of the theory of grey system to resolve the problem of prediction of helicopter tracks, establishing the GM model of grey systems and the cumulative residual error model of n degree, then correcting the GM forecast model. In the period of sampling, GM model and residual error model have been established on line to improve prediction precision.

结合武装直升机在巡航或搜索地面目标的特点，给出直升机航迹模型为协方差平稳随机模型，在线估计有色噪声参数，对测量噪声去相关，对直升机航迹进行卡尔曼滤波与预估，最后对有色噪声条件下的航迹进行了仿真研究；在数据非常有限的情况下，准确地预测又很困难，本文提出了用灰色系统理论解决直升机航迹预测问题，建立了灰色系统GM预测模型和n次累加残差模型并对GM预测模型进行修正，在每个采样期间内，实时在线建立GM预测模型和残差模型以提高预测精度。

Bark gray or greenish gray, rectangularly splitting.

树皮灰色的或带绿色的灰色，距形开裂。

Based on grey system the ory, we first propose some methods to the processing of measuring data in revers e engineering.

本文首次将灰色系统理论应用于逆向工程中测量数据的处理，提出了几种基于灰色系统理论的数据处理方法。

Based on analysis of the characteristics of equipment operation, and accordin g to the vibration intensity, a grey prediction model is established by use of g rey system theory.

分析了设备运行状态的特征，运用灰色系统理论对设备状态特征量——振动烈度，建立了灰色预测模型。

This thesis,starting from working out the arrest points and the infl ection points of the function curves of the grey mathema tical model GM(1:1 )and its residual correction model and residual period model, derives the conditions for empliying these grey models to obtain a higher class of accuracy,thus enabling the user to decide which model should be used in the light of the state of given initial sequency data.

从求得灰色数学模型GM(1.1)及其残差指数修正模型和残差周期修正模型函数曲线的驻点与拐点入手，导出使用这些灰色模型取得较高精度的条件，让使用者可依据初始序列数据的态势决定采用哪种数学模型，并且在结果未揭示以前便可大体上估计到拟合精度是否令人满意。

Gray Reef Shark, Kingman Reef Photograph by Brian Skerry This Month in Photo of the Day: Nature Gray reef sharks and red snappers hover above a patch of table coral, waiting for prey fish to emerge.

意译：灰色的暗礁鲨鱼，金曼暗礁。灰色的暗礁鲨鱼群和红色的笛鲷群徘徊在一片的台子珊瑚之上，等待猎物鱼出现。

With maturity, the coat color may lighten, so that a born black may become any shade of gray from black to slate to silver, a born brown from chocolate to sandy. Blues and fawns also show shades from dark to light.

成熟以后，被毛颜色会变浅，出生为黑色的狗，颜色会变成不同深度的灰色：从黑色到蓝灰色到银色；出生为褐色的狗，颜色会变为从巧克力色到沙滩色等不同深度的颜色；出生为兰色和驼色的狗也会变成从深到浅不同深度色调的颜色。

To the single axis control model of the stabilized platform, the sliding mode rule is founded. The value of extraneous disturbances is estimated by using GM (1, 1) grey prediction algorithm, and then it is added to the sliding mode control rule as the compensating part. At the same time, the value of the switching function is predicted by the grey prediction method, by which the control chattering phenomenon is reduced greatly.

基于稳定平台的单轴控制模型，设计了滑模控制律，采用GM(1，1)灰色预测算法估计扰动量，将其作为控制律中的补偿分量，同时应用灰色预测方法对滑模控制策略进行预测输出，有效地减弱了滑模控制的抖动现象。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。