查询词典 diffusion cosettes

Illustrative results are presented for the radiation dose and dose profile with activity distributions: uniform, determined by steady-state diffusion into the target volume, or determined by steady-state diffusion with a constant rate of loss of activity from the target.

计算程序用Visual Basic V6.0编写，在微机上运行。为了验证计算结果，将均匀分布条件下的计算结果分别与文献报导的结果比较，发现它们是一致的。

We also used diffusion equation to solve curren-time relation of ion diffusion under certain boundary conditions.

应用扩散方程，在一定的边界条件下解得电流注入过程中离子扩散的电流-时间关系。

Gas diffusion electrode was applied in the reaction system in order to weaken control process of diffusion.

比较了两种方法制备的气体扩散电极对反应控制步骤的改进效果。

Analysis of its behavior shows that the generalized diffusion process combines properties of both forward and inverse diffusion.

其行为的分析表明，广义扩散过程结合了这两个属性正，逆扩散。

The hot-rolled composite is a diffusion process, and the diffusion range of the elements is about 50 μm.

热轧复合为扩散型冶金结合，元素扩散范围在50μm范围内。

Fourth, in the view of technological system, the intrinsic characteristics of innovation diffusion are embodied in the diffusion process of technological knowledge.

所转移的技术知识涉及的不仅是边际交易费用为零的纯粹科学知识。

Secondly, regarding the diffusion rate as a bifurcation parameter, we show that the one-dimensional competition diffusion system with infinite delay and Dirichlet boundary condition exhibits the spatiotemporal structure near the steady state of the system.

介绍问题的生物学背景，概述Logistic模型和Volterra模型的研究历程并提出我们所研究的课题，另外还给出了所需的基础理论。

Rate constant of ONOO〓 formation, which is access to diffusion-controlled limit, is as three times as that of dismutation of O〓〓· by superoxide dismutase, and much faster than that of reaction of NO with hemecontaining proteins, thus demonstrating that ONOO〓 can form as long as NO meets O〓〓· during their diffusion in biological milieu.

ONOO〓在体内生成有较充分的理论依据。ONOO〓的生成速率接近于受控制的弥散极限，比超氧化物歧化酶歧化O〓〓·的速度快3倍，远远超过NO与血红素蛋白的反应速度。

Chapter 1 gives the background,current research process of relatedproblems and summarizes this thesis\'s work.In chapter 2,we study the Brownian motion with holding and jumping on the boundary.We use the resolvent method to obtain the infinitesimal generator because the domain of the infinitesimal generator is essentially the same as the range of the resolvent.Knowledge of this range and of the differential operator determines uniquely the infinitesimal generator.Since the semigroup generated by the DHJ is not strongly continuous,to use the nice property of strongly continuous semigroup in analytic theory,in chapter 3 we show that the dual is strongly continuous and derive ergodicity through spectral radius formulas and finally obtain the ergodic theorem by duality. In chapter 4,we discuss a class of a more general process---one dimensional Feller diffusion proposed by W.Feller in 1954.The Feller diffusion allows the possibility of jumps from boundary to boundary,not only from boundary to the interior.We give the stationary distribution of this process.

具体地，本文的结构如下：第一章给出了问题产生的背景，研究现状及本文的主要工作；第二章研究了在边界上逗留后随机跳的布朗运动，我(来源：3dABC论文网www.abclunwen.com)们用预解算子的方法得到其无穷小生成元，因为无穷小生成元的定义域本质上就是预解算子的值域，知道这个值域和微分算子形式就能唯一地决定无穷小生成元；由于DHJ过程产生的半群不是强连续的，为利用强连续半群的一些漂亮性质，在第三章中我们证明其对偶半群是强连续的，然后由谱半径公式得到遍历性并且最后由对偶得到遍历定理；第四章讨论了Feller在1954年引入的更广的一类过程----一维Feller扩散过程，Feller扩散过程允许有从边界到边界的跳发生，即不仅仅局限于从边界到内部的跳，在这一章中，我们给出了一维Feller扩散过程的平稳分布；在第五章，我们讨论了一些相关的问题，给出了DHJ过程对应的PDE问题及特征值与收敛速度的关系。

Decreasing N diffusion width and distance between N diffusion and emitter of minority carriers current can increase MAAP efficiency.

由模拟结果可知，减小N型扩散区的宽度，减小N型扩散区与少数载流子发射极之间的距离，增加P型扩散区的掺杂浓度以及使第二个衬底接触浮空可以有效地提升多环有源保护结构的效率。

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。