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For Mn5 cluster, the most stable structure is trigonal bipyramid with spin magnetism of 3 μ, and Mn6 cluster has the most stable structure of ferromagnetic octahedron with spin magnetic moment of 16μ.

Mn6的最稳定构型为铁磁性的畸变八面体（磁矩为16，C(下标 4v)）。各种异构体虽然多重度不同，但每个原子的自旋极化度均在3以上。

Spin coupling rules of ground state of 2,2′-bipyridyl as coupling unit and four radicals as spin centers have been studied by AM1-CI methods.

以2，2′-联吡啶为耦合单元，用*CH2，HNO*NH和*O四种自由基为自旋中心，设计出五种体系的分子。

Results:(1) Spin-echo sequence included axial, coronal and sagittal images. In T1-weighted images,the medulla oblongata is isointense,the cistern is hypointense; in T2-weighted images,the medulla oblongata is isointense, CSF shows hyperintense, and the arteries of posterior fossa appear hypointense flow voids. The cisternal cranial nerves are not clearly demonstrated in the routine spin-echo images. In 3D-time of flight images, the brain tissue shows isointense, CSF is hypointense, the artery shows hyperintense,and the cranial nerves show linear isointense.

2，结果：(1)常规SE序列横断面、冠状面及矢状面T1WI显示延髓等脑组织呈等信号，延髓周围池脑脊液呈黑色低信号，T2WI显示脑组织为等信号、脑脊液为白色高信号，脑底动脉在池内高信号背景下由于&流空效应&而表现为低信号，常规序列由于成像参数关系而不能直接显示脑池内颅神经；三维时间飞跃(3D-TOF)成像序列显示脑组织为等信号，脑脊液为低信号，而脑池内脑底动脉则呈高信号、脑池内后组颅神经为线状等信号。

A new density operator formalism for describing thecoupled high-spin systems was proposed.The formula ofevolution of density operators under the effect of weakspin-spin coupling were derived.Some experiments wereanalyzed include refocused INEPT and homonuclear COSY(for2D nuclear).

五提出一种描述高自旋体系密度算符演化的新方法，推导了高自旋体系和自旋算符在弱偶合哈密顿作用下的演化公式，并以■核(2D)为例，计算了重聚INEPT和同核COSY实验谱。

By simulating the EPR parameter D and the optical spectra, the distorted angles of two inequivalent sites which formed by Cr3+ replacing M3+ are determined and the obvious differences of the distorted angles calculated by using two spin orbit coupling parameter model and single spin orbit coupling parameter model are found.

通过模拟光谱和EPR谱确定了Cr3+取代 M3+形成的两种占位结构的畸变角，发现用双自旋轨道耦合系数模型与单自旋轨道耦合系数模型计算出的畸变角存在较大的差异。

Moon I watch you spin from afar I drink you in and breath you out I'm camouflaged by the timeline I'm camouflaged when the sun shines Two ships passing in the night [01:17.72]Two lips pressing ground the tides [01:28.98]I believe the world it spins for you [01:39.97]We will never be, I am the moon [01:51.24]I believe the world it spins for you [02:02.57]We will never be, I am the moon [02:13.49]I long to be a part [02:24.07]I isolate my heart [02:34.96]You've drawn me into your world [02:46.65]Now I too spin limbless [02:57.34]One hand clapping, where's the wind [03:08.73]I stand spanning at your distant wings [03:20.62]I believe the world it spins for you [03:30.89]We will never be, I am the moon [03:42.90]I believe the world it spins for you [03:57.78]We will never be, I am the moon [04:03.95]I believe the world it spins for you [04:16.12]We will never be, I am the moon

我看你自旋远方我喝你在和呼吸你出我很伪装的时间线我很伪装阳光照两个船舶通过在夜里 [01：17.72]按下的两个唇地面潮汐 [01：28.98]我相信它旋转为你的世界 [01：39.97]我们永远不会，我月亮 [01：51.24]我相信它旋转为你的世界 [02：02.57]我们永远不会，我月亮 [02：13.49]我渴望一部分 [02：24.07]我找出我的心 [02：34.96]您已经卷入我你的世界 [02：46.65]现在我太自旋 limbless [02：57.34]一只手鼓掌的风在哪里 [03：08.73]我站在你遥远的翅膀跨越 [03：20.62]我相信它旋转为你的世界 [03：30.89]我们永远不会，我月亮 [03：42.90]我相信它旋转为你的世界 [03：57.78]我们永远不会，我月亮 [04：03.95]我相信它旋转为你的世界 [04：16.12]我们永远不会，我月亮

The direction and the strength of the spin polarization are well controllable and manipulatable by simply varying the strength of spin-orbit interaction or the energy levels in quantum dots.

通过改变自旋轨道耦合强度或量子点内的能级很容易调节自旋极化的强度和方向，而且当量子点内的能级相等时电子-电子互作用能够增强量子点内的自旋积累，当量子点内的能级不相等时电子-电子互作用不能增强量子点内的自旋积累。

This paper gives a brief introduction for the classification, development and application of magnetoresistance effect and focuses on giant magnetoresistance effect, including multilayer magnetic resistance film, spin valve, membrana granulosa, spin tunnel magneto-resistor, discrete multilayer film and so on.

求助摘要翻译本文简要介绍了磁电阻效应的分类、发展历程及其应用，重点介绍了巨磁电阻效应，包括多层磁阻薄膜、自旋阀、颗粒膜、自

However in the study of nucleon spin structure,the gluon spin,quark and gluonangular momenta operators seem to have intuitive physical meaning but are not separatelygauge invariant.

但是在核子自旋结构研究中，胶子自旋，夸克和胶子轨道角动量看上去有直观的物理含意，但却不是分别规范不变的。

In this thesis, several problems of time-dependent systems in various branches of physics are investigated by making use of the generalized invariant theory and the invariant-related unitary transformation formulation. The problems are given as follows:(1) Spin model and geometric phase factor in the fiber We investigate the fiber experiment performed by Chiao-Tomita and the Chiao-Wu theory concerning the geometric phase factor in the optical fiber, and then show that the investigation of the propagation of photons inside the noncoplanar optical fiber can be regarded as that of a second-quantization spin model.

本论文用推广的不变量理论和与不变量有关的幺正变换方法研究了一些物理分支中的几个含时系统问题：(1)自旋模型与光纤中光子几何相因子问题重新考察了Chiao-Tomita光纤实验和Chiao-Wu关于光纤中光子几何相因子的理论，证明了在非共面弯曲光纤中传播的光子运动问题实际上可以化为二次量子化含时自旋模型研究。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。