反旋

By density-matrix renormalization group method, the 1/5-doping effect on the spin-1/2 Heisenberg antiferromagnetic chain is investigated.

利用密度矩阵重整化群方法研究1/5掺杂对自旋1/2海森堡反铁磁链的影响。

A positive and negative projection method of object to be tested based on universal pattern display card includes using 3D texture to present rebuilt body data of object to be tested, calculating out directional vector array of ray outgoing point to detectors, storing said vector array into pattern display card to form directional vector texture, rotating directional vector texture and directional vector around rotary shaft to realize once of positive projection course on any projective angle, using 3D texture index technique to let virtual slab set position be not limited any more in negative projection course.

本发明属于投影探测与成像技术领域，其特点在于该方法含有以下步骤：把被测物体的重建体数据用三维纹理存储表示；预先计算射线出射点至平面探测器上个探测器之间的方向向量数组，并存储到通用图形显示卡中形成方向向量纹理；利用方向向量纹理与方向向量绕旋转轴旋转来实现任一投影角度的正投影过程的一次完成，无中间结果转存；在反投影过程中，利用三维纹理索引技术使虚拟切片组的放置位置不再受到限制。

Our numerical results explain, for the first time, that the Mott-insulator state is caused by the antiferromagnetic spin density wave.

我们的计算结果首次指出了系统中 Mott 绝缘态是由于反铁磁自旋密度波造成的。

We suggest that this effect is the reflection of the spin density wave antiferromagnetic transition and the coexistence of different magnetic phases in the alloy.

此宽峰可能与该合金中自旋密度波反铁磁转变以及磁多相共存有关。

We obtain a new quark potential from the effective dilaton-gluon-coupling inspired by superstring theory, and by using this static potential, we explore the mechanism of quark confinement through calculations of the spin-average energy levels, the widths of the leptonic decays and radiative transitions for heavy quarkonium. The obtained results are compared with that of the Cornell potenial.

由规范场理论的超弦理论所激发的伸缩子一胶子有效藕合，给出了一个新的静态夸克一反夸克势，讨论了此势模型下重介子的自旋平均能谱、轻子衰变和辐射跃迁宽度，并与Cdrn叭势模型所得到的相应结果作了比较。

On the two hander this same grip gives the same advantage of topspin because it allows for contact to be further in front, making it easier to swing from low to high.

在双反选手中，同样的握拍也能达到上旋的好处，因为它允许触球点更靠前，那样由低至高的挥拍更容易。

At first this grip seems to give the one hander a lot of support on backhand groundstrokes, but with continued use and instruction it can give plenty of topspin too.

一开始这个握法好像对单反选手的反手落地回击球有很好的支持，但持续使用加上指导，它也能产生很大的上旋。

Notably, compounds 12–14 can be described as a 3D open–framework with nano–channels, compound 15 can be described as a 3D open–framework with double helical channels, while compound 16 can be described as a 3D heterochiral coordination polymer with double helical channels, which can be obtained by spontaneous resolution from the racemic phosphonic acid.X–ray powder diffraction analysis shows that compound 16 is a pure phase. Surface photovoltage spectroscopy of compound 16 indicates that it possesses positive SPV response in the range of 300–600 nm and shows p–type semiconductor characteristic.

值得注意的是，化合物12-14为具有一维纳米孔道结构的三维开放骨架结构，化合物15是具有双螺旋孔道的三维开放骨架结构，而化合物16是外消旋的有机膦酸配体通过自发拆分而形成的具有双螺旋孔道的多手性三维开放骨架结构。X-射线粉末衍射分析表明化合物16为纯相；化合物16的表面光电压光谱分析中，在300-600nm范围内有3个正的光(来源：ABC论文12网www.abclunwen.com)伏响应带，表明它具有p型半导体的特征；化合物16的诱导表面光电压谱进一步确定它的p型半导体的特征；磁性研究表明，化合物16中两Mn原子之间存在弱的反铁磁相互作用。

To remove or re-adjust arm, spin arm counter-clockvise until small transposing arm contacts back of pin.

要删除或重新调整臂，旋臂反clockvise移调小胳膊，直到接触回针。

The secondary gearbox is provided with a free-wheeling clutch, a pinion gear and bevel gears for transmitting the rotary movement of the engine to the counter rotating coaxial vertical shafts each carrying two rotor blades of airfoil cross section fixed by pitch bearing on teetering plates and teetering hinges to form horizontal rotors.

二级变速箱是提供一个自由转运离合器的齿轮和小齿轮锥齿轮传递旋转运动的引擎反旋转同轴竖井每个载有两名旋翼桨叶翼型截面固定音高关系摇摇欲坠板摇摇欲坠铰链，形成横向转子。

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。