四元的

I have avoided osg::Quat::slerp which interpolates between two quaternions as it is less accurate for our purposes.

我避免OSG的：：葛：：slerp这两个四元数插值，因为这是我们的目的不准确）。

Attenuatus and Sinonovacula constricta were 0.0937 (with 16S rRNA gene) and 0.1596 respectively. However, genetic distances between the two Solen species and C.

四种蛏类线粒体16S rRNA和COI基因在不同种间其明显的多态性差异，证实了16S rRNA和COI基因序列均普遍适用于蛏类种及以上阶元的系统学遗传多样性分析。

The SBS tetrabasic graft copolymerization was studied and effects of the monomer ratio,amount of AA and BPO,solidifying technology on adhesive properties were discussed,and the convenient adhesive with good properties for polyolefine was prepared.

研究了SBS四元接枝共聚反应，讨论了MMA/BA配比，AA和BPO用量、反应时间和反应温度及固化工艺对粘接性能的影响，并制得了性能优良、使用方便的聚烯烃用粘合剂。

The experimental results showed that the double salt Na2SO4·MgSO4·4H2O forms in the quaternary system Na+,Mg2+//SO42-,B4O72--H2O at 288K. The quaternary system has three invariant points F1,F2, and F3, seven univariant curves E1-F1,E2-F1,E4-F3,E5-F3,E3-F2,F1-F2,F2-F3, and five fields of crystallization [Na2SO4·MgSO4·4H2O,Na2B4O7·10H2O,Na2SO4·10H2O, MgSO4·7H2O,MgB4O7·9H2O].

研究结果表明：交互四元体系Na+，Mg2+//SO42-，B4O72--H2O 288K时的相平衡实验中，有复盐Na2SO4·MgSO4·4H2O生成，平衡相图中有3个共饱点，7条单变量曲线，5个结晶区，对应的平衡固相分别为Na2B4O7·10H2O，MgB4O7·9H2O，Na2SO4·10H2O， MgSO4·7H2O和Na2SO4·MgSO4·4H2O。

These two reactions that give different four-memabered heterocyclic products; both proceed;via a two-step mechanism involving a zwitterionic intermediate.

结果表明，这两个生成不同四元杂环产物的平行反应均为有一两性离子中间体的分步反应。

The former can provides a shorter path and least action to reach the desired equilibrium point; and the latter proposes a class of linear sliding-mode, which not only guarantees global nonsingular but also uncouples the original control system.

改进的PID控制律保证了闭环系统能够沿最短路径趋于稳态值；解耦变结构控制律直接针对完整的四元数设计一类线性滑模，从而避免了奇异问题，而且对原控制系统解耦。

While by introducing the spherical simplex UT, a better-behaved sigma point selection strategy, the number of sigma points required to the same transformation accuracy can be dramatically reduced, and accordingly, the computation burden can be avoided.

在有陀螺模式下，设计了基于误差修正罗德里格参数的SUKF姿态估计算法，在计算过程中同时能够保证四元数始终归一化。在无陀螺模式，基于MRPs的姿态表示和卫星刚体动力学方程，实现了SUKF姿态估计算法。

Above through the province of New Varieties of Examination Committee examined and approved by Apple, Cherry new varieties, each 400,000 yuan reward.

通过以上的新品种省考试委员会的审议和苹果，樱桃新品种，每四○○○○○元奖励批准。

The dual, ternary and quarternary alloy zinc powder of Zn, Pb, Bi, In were prepared by using the negative electrodeposition in the chloride electrolyte system in this paper.

本文采用阴极电沉积的方法在氯化物电解液体系中分别制备出Zn，Pb，Bi，In的二元，三元和四元合金锌粉。

A new technology for making chromium trioxide and potassium nitrate simultaneously by using nitric acid to decompose potassium dichromate has been analyzed according to phase diagrams of the K2Cr2O7-CrO3-KNO3-HNO3-H2O quaternary system at 0oC, 25oC and 45oC based on experimental results.

以实验测得的K2Cr2O7-CrO3-KNO3-HNO3-H2O四元体系相图为依据，对用硝酸酸化重铬酸钾联产铬酸酐和硝酸钾工艺过程进行分析，确定了铬和钾利用率最大时的操作条件。

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。