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Since most of the large molecules containing phosphorus element have double bonds, it is necessary to consider the special structures of double bonds in order to deal with these large systems more accurately. So, based on density functional theory and electronegativity equalization principle, applying a general atom-bond electronegativity equalization method , using separated program, through regression and least-squares optimization , the parameters of atoms and bonds in molecules are determined . By these parameters , the charge distributions and the energy of some molecules containing phosphorus element, especial the fragment of DNA, RNA, are calculated . The results are quite good.

由于这些含磷生物大分子体系都含有双键,为了明确的处理双键,进而更准确的解释带有双键和共轭双键的含磷生物大分子结构与性质的关系,我们以密度泛函理论~([1-4])和电负性均衡原理~([5-9])为基础,应用和开发原子-键电负性均衡方法中的σπ模型,利用最小二乘法,拟合确定了一些分子(含碳、氮、氧、氢以及磷等原子)的各种类型原子及化学键区域的参数,并利用上述参数计算了一些多聚核苷酸的电荷分布以及分子的总能量,进行了讨论,得到的结果可以和从头算相媲美。

In the second part, we firstly give the definitions of the double inverse limit and some dynamical properties related, then we use the above way to study the dynamical relations between the systems and lim{X, f^g},σ_f^σ_g...

在论文的第二部分,我们模仿逆极限{X,f的定义,提出了双重逆极限{X,f^g的概念,并针对X上的两个交换的自映射f和g,类似定义了系统上的一些动力性质,并证明了系统与系统(?{X,f^g},σf^σ_g之间在这些动力性质上的一些相关结果。

We lost some time during the double pit stop and I lost some positions in the field.

我们在同时进站的时候遇到一些困难并损失了赛道上的一些位置。

There are some dreams that dovetail with ascension and others that do not.

一些梦想是和提升相契合的,但有一些却并不契合。

We want to give you a range of technologies that will dovetail easily with the devices to be made public by the caretaker regimes.

我们希望给你们一些技术,在一些设备的帮助下很简单的让政府实现技术大众化。

In any process like this, there are always periods of downtime, when some people are working and others aren't.

在任何这样的谈判中总会有不顺利的时候,一些人在努力,一些人却没有。

I hoped they was going to say he could have one or two of the chains took off, because they was rotten heavy, or could have meat and greens with his bread and water; but they didn't think of it, and I reckoned it warn't best for me to mix in, but I judged I'd get the doctor's yarn to Aunt Sally somehow or other as soon as I'd got through the breakers that was laying just ahead of me -- explanations, I mean, of how I forgot to mention about Sid being shot when I was telling how him and me put in that dratted night paddling around hunting the runaway nigger.

我本来希望大伙儿会说,不妨把他身上的镣铐去掉一两根,因为实在太笨重了。或者有人会主张除了给他面包和水外,还该给他吃点肉和蔬菜。不过这些人并没有想到这一些。依我看,我最好还是不必插进去。不过据我判断,等我过了眼前这一关,我不妨设法把医生说的这番话告诉萨莉阿姨。我是说,作一些解释,说明我怎样忘了说西特中了一枪的事,也就是指那个吓人的夜晚,我们划了小船去追那个逃跑的黑奴,忘了提西特中枪的那回事。

Another is to mean thosecongratulations activities which happen by accidence.for example,some villagers areluck to draw a prizewinning ticket in a lottery,their children pass on the entranceexamination for university,join the army,birthday or other folk activities.

另一类喜庆活动即村民所说的"小节",主要是指村庄中的一些境遇性的庆贺活动,例如某村民运气好中了大奖,子女考上了大学、参军,或其它一些喜庆活动。

I think we need to write some letters, draw some pictures..

我想我们需要写一些信,画一些画。。。

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。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力