立方

There exist nT-rings R such that every element of R is a sum of 3 squares and a sum of 4 cubes.

还证明了存在该类型的nT-环R，R的每个元素是3平方和和4立方和。

By using the perturbation analysis procedure, it has been provided that, due to the regulating by the cubic nonlinearities, some parametric ranges in which 3-times superharmonic vibration arises exist in the system.

由於立方非线性对系统的调节，系统存在出现3倍超谐振动的参数域。

If the excitation amplitude is constant and the excitation frequency is close to 3-times resonance frequency, the effect of the 3-times superharmonic resonance on the system response increases greatly.

当激励幅值不变、激励频率逐渐接近3倍超谐共振频率点时，3倍超谐振动成分对系统响应的影响逐渐增加，这表明立方非线性对系统的调节作用越来越强。

This paper studies the invariant, which is the linear preserving problem based on generalized inverse of matrices. The generalized inverse of matrices and the research status of preserving problems of generalized inverse are outlined. In the basis of deeply understanding the basic knowledge of linear maps, the definition, characteristics of generalized inverse and decomposition of matrix, the author analyzes the decomposition form of preserving idempotence and preserving tripotence in the PID, then studies on the linear maps form of preserving group inverses of symmetric matrices.

本文研究的不变量是矩阵广义逆线性算子的保持问题，概述了广义逆矩阵，广义逆保持问题的研究现状，在对线性映射的基础知识，广义逆矩阵的定义、性质和矩阵的分解深入理解的基础上，深入分析了保幂等、保立方幂等矩阵在主理想整环上的分解形式，继而研究了保对称矩阵群逆的线性算子形式。

Firstly, according to Curie principle, the symmetry of the order parameter is decided by using the symmetry of the crystal before and after phase transition.

在居里原理的基础上，以PZT晶体、钛酸锶晶体和反铁电的简立方晶格模型为例研究了反铁电相变的序参量。

Perhaps situation may change as early as 2009 since Digital-Cube has been bought by Telson, which has readily available overseas distribution channels.

也许情况可能发生变化，早在2009年以来数字立方已经收购了尾，这现成的海外分销渠道。

When Digital-Cube was bought by Telson, the Digital-Cube CEO announced that it would release a PMP and mobile phone in 1Q 2009 through SK Telecom's network.

当数字立方收购了尾，数字立方体兼首席执行官宣布，它将推出的PMP和移动电话在第一季度到2009年通过SK电信公司的网络。

Telson has mobile phones related technology while Digital-Cube has PMPs.

尾有手机相关的技术，而数字媒体播放器已立方。

We replace Cd elements with equal numbers of Ag and In to form a new ternary P-Type (the structure with simple cubic in six-dimension space) AgInYb quasicrystals.

我们以等原子个数比例的Ag、In取代Cd元素制作出新的P-Type (六度空间为简单立方结构) AgInYb准晶体。

An intermediate template route was developed to grow cubic silicon carbide nanorods at relatively low temperature of 600~700℃ using tetrachloroethylene (C2Cl4) and silicon tetrachloride (SiCl4) as carbon and silicon sources, respectively by a solvothermal method.

采用中间模板路线在600~700℃相对低的温度下，用四氯乙烯和四氯化硅作为原材料，用溶剂热的方法合成了立方相的碳化硅纳米棒。

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。