查询词典 diffusion coefficient

The effect of thermal diffusion on electrical properies of SrTiO3 multi-function ceramics with coating ion was studied by application of the even design expermental method. Microstructure and element analysis were examined by SEM and Energy-Dispersive X-Ray analyss techenolegy. No new intergranuar phrase were oberved.The relationship amang electrical properties,diffusion conditions of the materials were discussed.

采用均匀设计液相涂覆热扩散方法，研究了涂覆离子，热扩散条件等对SrTiO3系陶瓷电性能的影响；用扫描电子显微镜作微观分析，X射线能谱仪作元素分析，证实钠离子的涂覆热扩散未在陶瓷晶粒之间产生新相，钠离子在晶粒内表面形成了一扩散层，讨论了扩散条件与电性能的内在联系。

RESULTS: Fluorescein concentrated cell presented extensively around micro-vessels after injection of both FA and FD. The speed of diffusion of FD in the brain was faster than that of FA. After FA injection, fluorescein concentrated image presented also around vessels, which developed to the distal along vessels, those in the cortex developed toward cerebral surface and those in the white substance toward ventral basicranial vessels of brain. The speed and distance were all bigger than the simple diffusion.

结果：注入FA，FD之后均可见微血管周围广泛分布荧光浓集细胞；FD在脑内扩散速度大于FA；FA注入后还出现血管周围荧光浓集影像，并沿血管通向远处，在皮质者通向脑表面，在白质者通向脑腹侧颅底血管，速度与距离均大于简单扩散。

Using sagital T1 weighted imaging (T1WI) of MRI and axial Diffusion imaging of MR and axial diffusion weighted imaging is a precise method to diagnosis callosal infarction.

结合MRI矢状T1加权(T1WI)扫描，和弥散加权成像横断扫描是诊断胼胝体梗死的准确的方法。

We have found that microfilament of cytoplasm was decreased or disappeared and rate of lateral diffusion of ConA r ceptor was increased (D = 1.05 ×10-10cm2/ sec)after the cells were treated with CB. The microfilaments and the rate of lateral diffusion of ConA receptor on cell membrane were recovered D = 0.81 ?

经CB处理细胞后，胞质微丝减少或消失，但是膜ConA受体复合物的侧向扩散运动增加〔D〕=1.05×10~(-1)cm~2/sec，当除去CB后，微丝重新出现，膜ConA受体复合物的侧向扩散运动又减慢〔D〕=0.81×10~(-1)cm~2/sec，与对照组相似。

Zn-diffused high power 650 nm AlGaInP/GaInP material with compressively strained multi-quantum-well active layer was fabricated. The zinc diffusion was used on the material facet in a sealed quartz tube. Photoluminescence spectra shows 175 meV blue-shift in the Zn diffusion area, which is transparent for 650 nm laser emission.

利用石英闭管法对金属有机化学气相沉积外延生长的应变量子阱650 nm AlGaInP/GaInP材料进行选择区域扩Zn，使扩Zn区域的光致发光谱的峰值蓝移达175 meV，形成对650 nm波长激光器的高透腔面，有益于减少激光器腔面光吸收，增加了激光器退化的光学灾变损伤阈值。

The IR analyses proved that the polymerization effects really occurred. The BET adsorption test indicated that the adsorption amount of MIPMs to LMD was as three times as that of non-imprinted microspheres. The controlled release test indicated that the release ratio of LMD on NIPMs was linearly increased with increasing time, which suggests that the release process is completely controlled by diffusion. Meanwhile, the release ratio of LMD on MIPMs was curvedly increased with increasing time, which indicates that the release process is controlled by both diffusion and the imprinting effect.

药物扩散实验表明， LMD在非印迹微球上的释药率几乎与时间呈直线关系，说明其释药过程完全受扩散控制；而LMD在MIPMs上的释药率则呈曲线上升趋势，说明其释药过程除了受扩散控制外，还受到药物模板分子与MIPMs之间的印迹效应的协同作用的控制，从而达到了缓释药物分子的目的。

SaFety/detonation prevention Leakage Atmospheric diffusion Inflammable and detonable Diffusion concentration

在研究易燃、易爆、有毒的重大危险源和泄漏物扩散模型的基础上，建立了易燃、易爆、有毒物三维数值模拟程序，得到了复杂地形条件下关键点的有害物浓度历史和有害物的时空分布

The results showed that new type structure of organic phase containing inorganic phase between polyimide and titania particle by bond conjunct was formed.The discomposing temperature was decreased with the increasing of TiO2 contents,and the thermal stability was better than polyimide materials under the temperature of 450℃.The pore size increased with the increasing of TiO2 contents,and pore size distribution tended to disperse.The permeability of N2,H2 and CO2 across the membrane were controlled by Knudsen diffusion,and the memebrane exhibited outstanding hydrophilicity since their permeation coefficients of H2O／N,are higher than the Knudsen diffusion values.

结果表明，杂化膜材料形成了有机相包裹无机相的交联结构；聚酰亚胺与二氧化钛粒子形成了新型键联结构；其热分解温度随二氧化钛含量的增加而降低，在 450℃以下热稳定性优于聚酰亚胺膜材料；平均孔径随二氧化钛含量增大而增大，孔径分布趋于弥散；N2、H2和CO2在膜内渗透由Knudsen扩散控制，H2ON2分离因子均大于Knudsen扩散值，表现出良好的亲水性。

The underline mechanism of diffusion and nucleation also be studied. Electroscopic imaging in transmission electron microscopy shows that SiOx act as a one-way diffusion barrier in oxide-mediated silicidation which only allows Co diffuse into Si substrate but inhibits Si diffuse out.

我们并针对其形成机制作探讨发现，氧化介层形成一个单向的阻绝层，只允许钴扩散进入矽基材，但阻挡矽向外扩散。

Solute diffusion controlled solidification model was employed to simulate the columnar to equiaxial transition of TiAl alloy casting. The simulation results show that solute shock wave occurs when the diffusion fields of columnar and equiaxial dendrites meet.

利用溶质扩散控制模型对TiAl合金柱状晶/等轴晶转变过程进行了数值模拟，结果表明，等轴晶在柱状晶前沿形核及生长过程中，当两个扩散场相遇时，观察到成分冲击波，它可能是导致柱状晶停止生长的一个主要原因。

Sodium citrate; calcium carbonate; calcium hydroxide; potassium bicorbonate; magnesium carbonate; ferrous sulphate; Zinc sulphate; copper sulphate; manganese sulphate; potassium iodide; sodium selenite.

柠檬酸钠；碳酸钙；氢氧化钙；碳酸氢钾；碳酸镁；硫酸亚铁；硫酸锌；硫酸铜；硫酸锰；碘化钾；亚硒酸钠。

All this to say that I'm glad filmmaking hasn't become completely ironic. I can enjoy an ironic film as much as the next person, but they usually involve a message of some sort. One that's delivered in a smirkingly clever way that requires little in the way of talent.

所有这些都是说，我很高兴电影制作没有变成完全讽刺艺术，我可以和下一个人一样享受讽刺电影的乐趣，虽然他们经常会被划归到一定级别，技术方面不需要很高的才能。