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In a dynamic priority system,Σ is a bounded Petri net and D is a dynamic structure describing the priorities between the transitions of Σ.

文中提出一种动态优先系统，其中Σ是有界 Petri网，D是描述变迁之间优先关系的动态结构。

The structure of repetitive nets that involve a pair of transitions standing in quasi fair relation (extended but not weak fair relation) is discussed and a Petri net model of the handshake daisy chain arbiter is given.

文献 [1？ 5]对公平 Petri网的性质进行了系统的研究，其中包括给出判定一个网为公平网的几组充分必要条件。作为公平性的一个应用

In order to study the transitions between quarks, we integrate out the effective antiquark fields and get a form of effective Lagrangian in terms of effective quark fields.

为方便描述正夸克间的跃迁过程，将上一步得到的有效拉氏量中有效反夸克场积分出去，从而在拉氏量中仅明显包含有效正夸克场。

The CDF physicists measured the rate of matter-antimatter transitions for the neutral Bs meson, a particle composed of a "bottom" quark and a "strange" antiquark.

CDF的物理学家们测量了中性Bs介子（一种由一个底夸克和一个奇夸克构成的粒子）的物质-反物质转变速率。

Software Description: PPTmovie perfectly works with animations, graphics, transitions and audios of the original PowerPoint Presentations.

PPTmovie 是处理原始 PowerPoint 演示的动画，图形，渐变效果和音频的最佳工具。

Extreme pressure opens fertile ground for the formation of novel materials, as evidenced by the new phase transitions, new superconductors, new chemical bondings, and ultimately the new Periodic Table, one which has the same elements but drastically altered chemical reactivities and physical behaviors.

极端高压条件下可以合成各种奇异的新物质，例如新的相变过程、新的超导体、新的化学键合，甚至新的元素周期表，因为同一种元素在极端高压下的化学反应和物理性质将完全不同。

In addition, the atomic transitions are largely detuned with thecavity modes, the...

此外，由于腔场处于大失谐状态下，只有原子的基态与腔场发生作用，其激发态与腔场不发生作用，因而原子的自发辐射可以被忽略。

By employing the Jordan-Wigner transformation and a modified mean field method, we are able to determine its ground-state quantum phase diagram approximately. The chapter IV is the main part of this Thesis. It contains the main innovations in our work. We propose and study in detail a S=1 Ising chain with the interplay of single-ion anisotropy and dimerization. The main results and innovations are the following: We show that the total number of the zero-component of spins at each site is a conserved quantity. This quantity, which may intuitively called as hole's quantum number, is hidden in the system. We show further that the hole's number in the ground-state is zero; By using the Jordan-Wigner transformation, we map this model onto a series of subsystems described by the spin 1/2 dimerized transverse Ising model. We solve the subsystems exactly, by presenting the exact wave functions and spectra;We show that this system exhibits a series of quantum phase transitions by varying the dimerization strength. We determine the quantum critical points exactly. We also show that the criticality is the same as that of the uniform S = 1/2 transverse Ising chain.

第四章是本文的重点及主要创新内容，我们具体研究了自旋为1的在横向单离子晶格场中的一维二聚化Ising链，我们得到的主要结果和创新之处是：(1)证明了这一模型具有一种隐藏的对称性，即自旋第三分量为零的格点数目是一个守恒量，并证明基态出现在空穴数目为零的子空间中；(2)利用Jordan-Wigner 变换将此模型变换到一系列自旋为1/2的横磁场中的二聚化Ising 模型，并给出了相应严格的波函数及能谱；(3)我们发现系统的基态随着二聚化强度的变化将呈现出一系列量子相变，我们得到了量子临界点的精确位置，并证明其临界性质与自旋为1/2的横磁场中的均匀Ising 链中的临界行为属于同一普适类。

Many terms commonly used by abstract or constructivist artists can be found amongst the titles of works in this exhibition. One can easily think of them as transitions between energy and material, or the visible and invisible, or a kind of musical eurhythmy that manifests a structure hidden in the movements.

从这一次的展出作品的命名辞汇中，依然有许多来自抽象和构成艺术家的惯用语词，极容易令人想像的是一种能量和物质、可见与不可见的转换现象，一种隐藏在行动中的结构，一种音乐性的律动。

Its light-emitting principle is: the molecular or atomic electronic peripherals by an external energy such as heat, light ray excited from the ground state to excited state transitions at non-steady state.

其发光原理是：分子或原子外围的电子受外界能量如热、光射线激发后，从基态跃迁至激发态，处于非稳定状态。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。