探讨脑铁含量与T2弛豫时间的关系。
Purpose: To study correlation between brain iron content and T2 relaxation time.
弛豫时间是热激活式的。
木材—吸附水系是一个多重弛豫时间的介电体系。
The wood-absorptive water is a multi dielectric relaxation time system.
而且最小模式弛豫时间与孔隙大小为非线性关系。
And under this situation, it is no longer a linear function between relaxation time and pore size.
因此理解内部磁场梯度对T2弛豫时间的影响是很有必要的。
Thus it is important to understand the effects of diffusion on T2 relaxation times due to internal field gradients.
弛豫时间适中，析出颗粒基本分布在位错线上并钉扎位错。
Most of strain induced precipitates distribute along dislocations and pin dislocations in sample relaxed for proper time.
目的探讨正常中国人海马t2弛豫时间(HCT2)及其影响因素。
Objective to study the hippocampal T2 relaxation time (HCT2) in healthy Chinese and its influencing factors.
不用作两维谱，测量过程类似于常规弛豫时间测量，实验简便、准确。
The approach like those of routine measurements of relaxation time is simple and accurate.
水分状态的测定使用自旋-晶格和自旋-自旋弛豫时间（T1和T2）。
The state of water was measured using spin-lattice and spin-spin relaxation times, or T1 and T2 respectively.
在平均场近似下求出的状态方程包含了动态斯塔克效应及弛豫时间参数。
The two-photon equation of state including dynamical Stark shift and relaxation parameters is obtained and studied under mean-field approximation.
在弱光范围，光响应随光强的变小呈线性减弱，且光响应的弛豫时间变长。
In the weak intensity range, the photoresponse decreases linearly with the light intensity and the relaxation time of the photoresponse becomes larger.
结果表明：在适当的弛豫时间下，能进一步提高材料的屈服强度和抗拉强度。
It is showed from the result that the yielding strength and the tensile strength of HSLA were improved in appropriate relaxation time.
对气体分子动力学交通流模型的弛豫时间进行了改进，使之与密度及速度相关。
An improvement is made on relaxation time of gas-kinetic traffic model, and the density and velocity are taken into account.
岩石孔隙按大小分组后，每一组孔隙的氢核弛豫时间可以用球管孔隙模型计算。
All pores are divided into different groups by their radii, and the relaxation time of each group can be calculated with the sphere-capillary model.
模拟过程中还研究了电子耦合强度和溶剂弛豫时间对电子转移反应速率的影响。
The jointed effects of the electronic coupling and solvent relaxation time on the rates are also explored.
指出这种影响的大小主要取决于激光源的相干时间与感生光栅弛豫时间的比值。
It is shown that the ratio of the correlation time of the laser source to the relaxation time of the induced grating plays an important role.
进而又研究了单链高分子的弛豫过程，给出了末端距向量自相关函数的弛豫时间。
Furthermore, the author also studied the relaxation of single polymer chain and obtained the relaxation time of the autocorrelation function of the end-to-end vector.
结果表明：自由水和原油的核磁共振横向弛豫时间（T2）都随温度的升高而增大。
The results show that, the T2 relaxation time for bulk water and oil samples increase with increasing temperature.
采用PRFT法估测了四种甲基化腐植酸中各类碳的纵向弛豫时间T_1值的范围。
The spin lattice relaxation time values (T_1) of different types of carbons in the methylated humic acids from four soruces are estimated with PRFT method.
测试值在低速率被拉伸时，由于链段中的弛豫时间的减少的拉伸速率的增加而增加。
When being stretched at low rate, the testing value increases with the increasing of stretching rate due to the reduction of relaxation time in chain segments.
结果表明：原子的非简谐振动会影响单畴铁磁粒子的自由能，但是不会影响弛豫时间。
Considering atomic anharmonic vibration, the authors have figured out the expression of free energy and relaxation of single-domain ferromagnetic granule in magnetic field.
面团自由水表现出来的弛豫时间T23与发酵时间曲线在整个发酵期内呈波浪形变化。
The curve of T23 and fermentation time undulated in the all course of fermentation.
同时，随着两卟啉环的距离增大，电子自旋弛豫时间变长，证实了双铁卟啉络合物的形成。
The relaxation time increases with distance between two porphyrin rings and the results provide an evidence of formation of the complex.
结果：灰质核团t2弛豫时间随脑铁含量增加而缩短，脑白质t 2弛豫时间无变化趋势。
Results: T2 relaxation time of gray matter nucleus was shorten because of iron content increasing, and that of white matter had not this change.
理论和实验研究表明，岩石激发极化弛豫时间谱与地层孔隙结构和渗透率有非常重要的关系。
Theoretic and experimental results show that the induced polarization relaxation time spectrum relates to the pore structure and permeability of a rock.
通过数值求解耦合波方程，研究了半导体光放大器弛豫时间对四波混频波长变换效率的影响。
This dissertation is devoted to effects of relaxation times on wavelength conversion efficiency based on four-wave mixing(FWM) in semiconductor optical amplifier(SOA).
由于天然气和水的弛豫时间和扩散系数的差异，可以利用差谱分析法和移谱分析法来识别天然气。
Because natural gas and water have different relaxation time and diffusion coefficient, we can use DSM and SSM to identify them.
通过研究全直径岩心不同驱替阶段核磁共振弛豫时间谱的变化规律，探讨了低渗透储层渗流机理。
The percolation mechanism in low permeable reservoirs is investigated through studying the law of NMR relax time in different displacement stage of full core.
把激光脉宽调整到与吸收颗粒的热弛豫时间一致可以避免热副作用，可对所选细胞产生选择性处理。
Adjusting the pulse width of the laser to the thermal relaxation time of the absorbing construction can avoid thermal side effects and facilitate a selective treatment of the selective cells.
方法：采用配位竞争法测定钆螯合物的稳定常数，采用反转恢复法测定钆螯合物的水质子弛豫时间。
Methods The stability constants of gadolinium chelates were determined by using a compitition method and water proton ralaxation times T1 were measured by means of the inversion recovery method.
应用推荐