矩

And then, adopting the same model, cyclic moment estimation statistic of different orders are constructed respectively, large sample variance expressions of the estimator through theoretic analysis are derived, as well as the constraint relation of estimator performance and noise statistical characteristic. The curve of estimation performance is obtained through Monte Carlo simulation test, which proves the related conclusion derived.

然后，论文同样以加性和乘性噪声联合干扰下的复谐波信号和复线性调频信号为观测模型，分别构造了基于不同阶次的循环矩估计量，从理论上推导出了估计量的大样本方差表达式，分析了估计量性能与噪声统计特性的约束关系，通过Monte-Carlo仿真试验得到了估计性能的曲线，验证了推导的有关结论。

Because invariant moments are invariable to transportation, rotation and scale transformation, they are widely used in automatic target recognition.

不变矩特征具有平移、旋转和比例不变性等优点，因此在目标识别中得到了广泛的应用。

PES samples were pyrolysed at 358℃ and 590℃, the products of dogradation can be explained on the basis of chain scission. The thermal stability of PES in both inert and oxidising atmospheres has been studied by means of TGA at varies rate of temperature rise.

在正常加工温度（315~335℃）下，使用HAAKE转矩流变仪对PES进行密炼和用挤出机对PES反复挤出，发现并研究了PES的外观，粘度、分子量及力学性能的改变。

Vector control is the foundation of high performance PMSM control system Every vector control is analyzed and compared and several system characteristic are studied with special screw propeller load in this thesis, and then it is put forward that optimal torque control is the best control method of PMSM propulsion system.

本文对现有的几种矢量控制进行了深入的分析和比较，并结合推进系统特殊的螺旋桨负载研究了系统的各种特性，提出把转矩最优控制方案应用到舰船永磁同步电动机推进系统中。

The paper has a modularization analysis of ship electrical propulsion system. The paper develops the simulating mathematical model of every subsystem. It includes the thrust and torque of screw propeller, the resistance and re-torque in the movement of ship.

本文对船舶电力推进系统进行了模块化分析，建立了船舶运动中螺旋桨推力、扭矩，船舶运动的阻力，偏转的阻转矩等不同功能子模块的数学模型。

Based on method of moment and field-circuit coupling theory, nodal method of analysis in circuit theory is applied to the power parameters calculation of grounding grids. The inner self-resistance and self-inductance of conductors, mutual inductance between conductors, and displacement current of conductors are taken into account.

基于矩量法和场路结合的思想，将电路中的节点电压法用于接地网工频参数计算中，该方法不仅考虑了接地导体的内自阻抗和自感，而且考虑了导体间的互感，导体的位移电流。

Motivated by the newψfunctional stability,we can establish some new kinds of stabilities which are different from the exponential stability.With the help of semimartingale convergence theorem,stochastic calculous,moment inequality,Burkholder-Davis-Gundy inequality,Gronwall inequality etc.,we find that the product ofψfunction and the solutions of neutral equations will approach a nonempty set if some specific conditions are satisfied.

我们应用半鞅收敛定理、随机微积分的相关知识以及矩不等式、Burkholder-Davis-Gundy不等式和Gronwall不等式等技巧，得到中立型随机泛函微分方程的解与特定的"ψ函数"的乘积在一定的条件下将趋向某非空集合这一结论，并建立了该中立型方程的随机LaSalle型定理。

And then obtained under some conditions of probability are some sufficient conditions for moment complete convergence for independent non-identically distributed random elements in a separable Banach space which are stochastically bounded by a positive random variable.

文章在随机元序列随机有界于某非负随机变量的条件下，引入慢变化函数l和选定的函数类S，在一定的概率性条件下，得到B值独立不同分布随机元序列矩完全收敛性的充分条件，推广了有关文献的结果。

RESULTS: The biomechanical parameters (maximum torsional momentque, torsion angle and shearing elastic modulus) of Wistar rat's femur irradiated with 15 and 20 kGy were almost the same with that of control group in torsion test.

结果：15，20 kGy辐照组与未辐照组扭转试验的生物力学测试最大转矩、扭角和剪切弹性模量结果相近，差异无显著性意义。

The maximum shearing stress is proportional to the applied torque and inversely proportional to the polar moment of the cross section.

最大的切应力和所加扭矩成正比，与截面的极惯性矩成反比。

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。