矩

The lattice constant, atomic moment and the anisotropic magnetostriction exhibit abrupt changes at about 42 K, which is connected with the first-order structural transition and indicative of a strong coupling between magnetism and crystal structure.

晶格常数、磁矩和各向异性磁致伸缩常数在42K都有一个迅速跳变，这与一级结构相变密切相关。

Since the atomic radius of cerium or yttrium is at the border between the Th〓Ni〓-type and the rhombohedral Th〓Zn〓type structure, the influence of different annealing temperatures on the crystal structure of Ce〓Co〓 and Y〓Co〓 compound was clarified.

测量并获得了这些化合物的晶体结构类型、点阵常数、晶胞体积、居里温度、在5K和300K时化合物的饱和磁化强度和每个Co原子的平均磁矩、各向异性场、各向异性常数、自旋重取向温度以及补偿温度等，并获得了相应化合物的磁相图。

Based on Hankel's matrix method and augmented least square recursive algorithm,the paper features the recursive least squares method of nonlinear parameter estimation with forgetting factor by introducing the constraint indicator of ...

依据Hankel矩阵法，在参数估计准则函数中加入待估参数的增量约束项和遗忘因子，并结合增广最小二乘递推算法，提出一种具有遗忘因子的非线性参数估计的递推最小二乘法。

Experimental results show that the proposed method is fast,stable and accurate,and the measuring accuracy of the modified CCD laser autocollimator is improved from 2 arcsec to ±0.25 arcsec in 0.23 s using the proposed method.

光电自准直仪中典型的激光CCD自准直仪因其较高的测量精度和稳定性得到了广泛的应用[6~10]，但其常用的定位方法，如重心定位法[7]、矩心内插法[8]等，均存在定位精度低、重复性差且计算速度慢的缺点。

To represent the shape content of an image, the edge orientation autocorrelogram is used. To represent color features, local color cumulative histogram is computed, and to solve the problem of lacking the spatial knowledge of the histograms, we also extract the color moments of the partitions.

用边缘方向自相关图表示图像的形状内容；对于颜色特征，计算图像颜色的局部累加直方图，同时为了弥补其不包含颜色空间分布关系的缺点，又提取了分块的颜色矩，并利用高斯模型对各特征距离进行归一化，综合上述三个归一化距离，进行全局相似度量。

The color moments of partitions are extracted from the L(superscript *)a(superscript *)b(superscript *) color space to solve the problem that the global color moment excludes the color space distribution, the edge orientation autocorrelogram is used to represent the shape content of an image, and the feature distance is respectively computed. The Guassian model is used to normalize the feature. Based on the normalized distance, the global similarity measure is obtained, and the retrieval precision is improved by the weight value adjustment.

为了弥补全局颜色直方图不包含颜色空间分布关系，在La6颜色空间提取分块的颜色矩，同时利用边缘方向自相关图获得图像的形状内容，然后分别计算各特征的距离并利用Guassian模型进行特征归一化，综合上述各归一化距离，进行全局相似度量，最后采用了权值调整的相关反馈方法进一步提高检索精度。

Since the lotus root decompression for the box to start the counter protective structure, there are auto-transformers, AC contactor, smart motor protectors digital display components, etc., and below 75 kilowatts for the products, the Department of the use of automatic control mode, and more than 80 kilowatts of products, with two automatic control mode manually, by the change-over switch to switch, smart motor protectors digital display of 0 ~ 240 seconds can be automatically adjusted to control start-up time, prepared autotransformer 60 percent have a rated voltage (65%) and 80% tap two groups, then the factory in 60%(65%) on tap, if you need a larger starting torque, which can be accessed by 80% in the tap, and there are overload, and loss of pressure off the protection.

自藕减压启动柜为箱式防护结构，有自耦变压器、交流接触器、智能数显电机保护器(时间继电器、时间继电器)等元件组成，对于75千瓦及以下的产品，系采用自动控制方式，80千瓦及以上的产品，具有手动自动两种控制方式，由转换开关进行切换，智能数显电机保护器在0～240秒内可以自动调节控制起动时间，自耦变压器备有额定电压60％（65％）及80％二组抽头，出厂时接在60％（65％）抽头上，如果用户需要用较大的起动转矩，可接在80％抽头上，并有过载、断相及失压保护。

Additionally, torque ripples produced by both the nonideal back electromotive force and low-speed current commutation could be restrained.

同时，系统能够有效地抑制非理想反电势和低速时电流换相引起的转矩波动。

To overcome these two deficiencies in the existed system, the back electromotive force shape function method is proposed to realize the real time calculation of phase voltage and make the estimation of torque easer.

最后给出的仿真与实验结果证明了反电势形状函数法用于无刷直流电机直接转矩控制中的可行性与有效性。

The instructive conclusion was: 1 under the vertical loading, the shear-lag effect was produced badly, more severer under concentrated loading than under uniform loading .2 the longitudinal bending deformation of the beam flange was true of the imitating plane assumption of deformation . 3 the width length ratio was confirmed as the first factor working on the shear-lag effect among all the geometric parameters;4 the shear-lag coefficient of simple-supported box-girder was severer than the continuous box-girder, the shear-lag effect in the inner supported section of continuous beam was much more severer, we need paying more attention for it in designing. 5 the non-liner characteristics of material deformation have littlie influence on shear-lag effect in BGCW. 6 the experiential calculating formulation and calculating diagram for the effective flange width was raised with the only factor of the width-span ratio., but the primary location of axis of bending moments should not be changed while calculating the inertial moment .

研究认为：1室内模型试验和空间有限元分析结果均表明波形钢腹板组合箱梁在竖向荷载作用下，翼板出现了典型的纵向应力剪滞效应。2在竖向荷载作用下，截面高度上各点纵向正应变分布认为可符合"拟平截面假定"，以此作为波形钢腹板组合箱梁抗弯计算的基本假定。3箱梁宽跨比是影响波形钢腹板组合箱梁翼板剪滞效应的主要因素。4连续波形钢腹板组合箱梁的翼板剪滞系数大于简支梁，且连续箱梁内支点截面翼板剪滞效应相当严重，对此需十分重视。5当混凝土翼板受力由弹性阶段进入弹塑性阶段时，材料的非线性特性对翼板的剪滞效应影响甚微。6提出了根据组合箱梁的宽跨比参数来计算翼板有效宽度比的经验公式和计算图表，但箱梁截面抗弯惯性矩的计算不应改变原先的截面中和轴位置。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。