扩散

A modified etching model is proposed, in which the diffusion coefficient is a function of the temperature and concentration and the etching rate constant is a function of temperature.

在前人腐蚀模型基础上考虑扩散系数是浓度和温度的函数，腐蚀速率常数是温度的函数，得到了修正模型。

A new symbol-constrained joint source-channel decoding algorithm for VLCs is presented.By constructing double-tree VLCs sources,the propagation-error problem is evidently alleviated.Meanwhile,by applying symbol-constrained method to MAP algorithm,not only the a priori probability of VLCs sources is efficiently utilized,but also the Symbol Error Rate is reduced enormously.

提出了一种新的针对不等长编码信源的符号约束MAP联合译码算法，利用VLCs双树信源的构造方法，有效地抑制了VLCs的错误扩散；同时，通过将"符号约束"的思想应用于最大后验概率译码算法，不仅充分利用了信源先验信息，而且极大地降低了误符号率。

At present, the City reported a total of HIV infection have more than more than 8000 cases, one of two counties Liujiang abatis and cumulative reports are more than 1000 cases of the emergence of the AIDS epidemic from high-risk groups to general population the proliferation of signs.

目前，柳州市累计报告HIV感染者已超过八千余例，其中鹿寨和柳江两县累计报告均超过一千例，出现了艾滋病疫情从高危人群向普通人群扩散的征兆。

based on the analysis of regressing the experimental dada show: diffusion coefficient decreases as the increasing of absolute pressure in linear; increases in a way of logarithm with the varying rate of pressure.

对试验数据回归分析表明：木材水分扩散系数随绝对压力的增加呈线性减小；随压力变化速率的增加呈对数曲线增大。

First, it describes the absorbability of industrial cluster.

第三章论述产业集群对技术引进、扩散和创新的影响。

Xi'an Dongfang Mech Group Company Abstract : A high precision data collection system is designed by using 24 bits ADC which has the function of self - calibration and signal processing.

扩散硅压力传感器及变送器参数测试系统：采用具有自校验和信号调理功能的24 位ADC ，开发设计了一种高精度数据采集系统。

The differential eguations and boundary conditions are established, based on these hypotheses. The theoretical formulary about sample atom number with different diffusion coefficient are reasoned out; the relationship between the isotope abundance ratio and the sample wastage of melting and solid samples and the samples simultaneously at evaporation and decomposition are discussed in theory.

根据这三条假设建立了样品原子数的微分方程及边界条件，推导出了不同扩散系数的样品原子数的理论公式，从理论上讨论了熔融态、固态样品以及蒸发分解同时发生的样品同位素丰度比与样品消耗量间的关系。

In order to let Apparent Hurst exponent be greater than 1, an accelerated fractional Brownian motion is introduced based on the fractional Brownian motion. A new particle tracking technique is established to model the non-Fickian dispersion in coastal waters.

因此本研究在分数型布朗运动的基础上，引进加速分数型布朗运动来模拟non-Fickian扩散，使表面Hurst指数可以大于1，从而建立了一种新型的粒子追踪技术，由此来模拟沿海水域中的non-Fickian传播。

Diffusion through carbon steel is too high to be practical, but may be acceptably low for metals such as aluminium, or even stainless steel.

通过扩散碳钢太高是切实可行的，但可能是可接受的低金属，如铝，甚至不锈钢。

In contrast, the concentration of deep defects is very low in annealed undoped InP and the doping of Fe acceptor by diffusion acts as the only compensation centre to pin the Fermi level, resulting in excellent electrical performance.

相比之下，非掺退火半绝缘InP材料中深能级缺陷浓度很低，通过扩散掺入的铁受主作为唯一的补偿中心钉扎费米能级，因而表现出优异的电学性质。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。