转变

In order to understand the polymer chain conformations above and below the glass transition temperature, dihedral angle distributions of polymer chains at various temperatures are also studied.

为了了解高分子链构象在玻璃化转变温度之上和之下的变化，对高分子链在不同温度下二面角分布也进行了研究

The phase shift is determined by requiring that the optimised lie close to a minimum in the dihedral potential.

相转变取决于二面角势能的最小化需求。

So a diktat from a right-wing president of the republic provided a dramatic twist to the tale.

这样，来自一个有右翼倾向的法国总统的命令使故事发生了急剧转变。

Organic montmorillonite combines inorganic montmorillonites excellent dilatability, adsorption and dispersion with huge hydrophobic area, so it has very good affinity for organic substance and has been widely used in organic system.

模拟汽油体系的吸附脱硫实验表明，改性后的蒙脱土表面由亲水性转变为亲油性，体系中的含硫化合物被吸附到蒙脱土的层间，有机蒙脱土吸附脱硫的作用是分配作用和表面吸附共同作用的结果。

The velocity profile, apparent viscosity and laminar - turbulent transition for dilatant cement slurry flow through ecentric annuli are studied in this paper.

本文研究了胀流型水泥浆在偏心环空中的速度分布、视粘度及流动状态的转变等问题。

The result showed that, the effect of the synergistic reaction of alkyl-phenol-polyoxythylene ether phosphate dispersant TERSPERSE 4896, nonyl phenyl polyoxyethylene ether dispersant TERSPERSE 2210 and XG to suspension was different. Both the rheological curves were same presented as pseudoplastic fluid when they stored in R. T (18~25℃) for 10 days, but the rheological curve of suspension with the synergistic reaction of TERSPERSE 2210 and XG was changed to dilatant fluid when it stored in R.

结果表明，烷基酚聚氧乙烯磷酸酯类分散剂TERSPERSE 4896、壬基酚聚氧乙烯醚类分散剂TERSPERSE 2210与增粘剂黄原胶协同使用所得悬浮体系，室温(18~25℃)贮存10d仍表现出二者共同的流变特性，呈假塑性的流变曲线；但室温贮存150d后，含TERSPERSE 2210与黄原胶的悬浮体系的流变性质发生了明显变化，由假塑性流体向膨胀型流体转变。

The only alternative and referential way to predict the phase transformation temperature is to make use of the continuous cooling transformation diagrams, which are measured dilatometer curves that have not taken the effect of practical welding conditions into account.

由于焊接过程的瞬时性和焊接热影响区温度场、应力场的复杂性，该区域的组织转变往往并不完全遵守热处理条件下CCT 图所反映出的相变规律，因此为了提高焊接接头的性能，有必要深入研究真实焊接条件下热影响区组织的相变规律，尤其是马氏体组织的相变规律，因为在含碳量较高或合金元素较多的情况下，这两类钢的淬透性较强，在焊接热影响区极易形成高硬度马氏体组织，从而严重影响焊接接头的性能。

CCT curve s of 450 MPa and 550MPa high strength weathering steel were studied by gleeble1500 hot simulator and DT-1000 dilatometer.

采用Gleeble1 5 0 0热模拟试验机及DT 1 0 0 0膨胀仪研究了 4 5 0MPa和 5 5 0MPa级高强耐候钢的连续冷却转变曲线，分析了不同变形及冷却工艺条件下高强度耐候钢的金相组织类型。

CCT curves of 450 MPa and 550MPa high strength weathering steel were studied by gleeble1500 hot simulator and DT-1000 dilatometer.

采用Gleeble1 5 0 0热模拟试验机及DT 1 0 0 0膨胀仪研究了 4 5 0MPa和 5 5 0MPa级高强耐候钢的连续冷却转变曲线，分析了不同变形及冷却工艺条件下高强度耐候钢的金相组织类型。

In the single crystal of C60 with a FCC structure,positron mainly appears outside the C60 molecule.The main annihilation space is the interspace between molecules.The calculated positron bulk lifetime in C60 is 352ps, which agrees with experiment value of 356ps in literature.In carbon nanotube bundles with different dimeters,as the diameter of carbon nanotubes increases,the main space where positron appears changes from the interspace of carbon tubes to the space inside carbon tubes,the radio between positron annihilation with valence eletrons and core eletrons becomes larger,the positron bulk lifetime in carbon nanotube increase rapidly first and come to be a constant at the end.The calculated positron lifetime of carbon nanotube with a dimeter of 0.8～1.6ns is 332～470ps,which agrees with the experiment value of 394ps.Positron annihilation has been studied in widly used compound semiconductors.

计算结果表明：在片层结构的石墨晶体中，正电子主要在石墨层间的空隙中湮没，计算出的石墨中的正电子寿命为208 pS，与文献中的实验结果215 ps符合很好；在金刚石单晶中，正电子主要在碳原子之间的空隙中存在并发生湮没，计算出的金刚石中的正电子寿命为115 ps，文献中的实验结果110 ps左右符合；在面心立方结构的C60晶体中，正电子主要在C60分子球壳内外侧及分子之间存在，C60球形分子中心正电子分布很少，正电子的湮没区域集中在C60分子之间的空隙区域，计算出的C60中的正电子寿命为352 ps与文献中的实验结果356ps相符合；对于不同管径碳米管束中的正电子分布，随着碳纳米管直径的增加，碳纳米管束中的正电子由主要在碳纳米管管间的区域出现转变为主要在碳纳米管管内中心的区域出现：碳纳米管束中的正电子与碳原子的价电子的湮没概率变得越来越大，与核心电子的湮没概率变得越来越小；碳纳米管束中正电子的湮没寿命先迅速增大，而后趋于一定值。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。