李

ACTA PHOTONICA SINICA, 2010, 39(3): 446～449 in chinese

李成：中国科学院研究生院，北京 100049

Li Kaifu emphasized Chinese group particularly the action in technical research and development.

李开复特别强调了中国团队在技术研发中的作用。

This article derives the extrapolated method gradually from integral action's each kind of optimized model, and it introduces emphatically the Richardson extrapolation technology and the Romberg squaring algorithm.

本文从积分运算的各种优化模型中逐步导出外推法，着重介绍了李查逊外推技术及龙贝格求积算法。

Act IV, scene vii of Lear, if had a tempo marking as in music, would be an adagio, but it is still one of the most profoundly moving scenes in world literature.

如果《李尔王》第四幕第七场有音乐速度标记的话，可以算慢板，但它依然是世界文学中最感人肺腑的场景之一。

And now, without further adieu, we'd like to welcome Prof. Li to give his speech.

现在，就不多介绍他了，让我们直接欢迎李教授发言。

Generally I only listen to Yundi Li's version, which is the most adjacent to my soul.

一般说，我只听李云迪的版本，它最靠近我的灵魂。

We develop his ideas by finding some algebraic invariants under the adjoint actions of the group in addition to the Killing form and give a rigorous proof of the optimality of the one-parameter systems for the symmetry group of the given equations.

本文系统地研究了1+2维非线性发展方程的对称代数，证明了该方程容许一个七维李点对称群，利用Olver提出的方法，详细地建构了1+2维非线性发展方程的一维最优系统，在此基础上我们发展了他的方法，发现了除Killing型之外的其它六个在群伴随作用下的代数不变量，利用这些不变量证明了该最优系统的最优性。

In the first part,two methods calculating the coefficients of nilpotentclass normal forms are proposed.one is the iteration search method based onrepresentation theory of Li-algebra,and another is a new matrixrepresentation method based on the adjoint operator concepts,both are ableto be used to analyse the normal form problems with high orders and largedimensions efficiently.

在第一部分工作中，对于幂零类规范形的系数计算，分别提出了基于李代数表示论的迭代搜索的理论和方法以及基于共轭算子概念的新的矩阵表示的理论和方法，从而有效地解决了维数和阶数较高时的计算问题。

Law of SamSung spy check suggests to be in two months adjudge, accordingly, old court is the fastest will make final court decision to Li Jianxi December.

三星特检法建议在两个月之内宣判，因此，大法院最快可能会于12月份对李健熙做出最终判决。

Lee, who as Hawaii's adjutant general directs the state's Army and Air National Guard, says Hawaiian residents and tourists aren't in danger.

李，作为指挥国家陆军和空军国民警卫队的夏威夷副官表示，夏威夷居民和游客都没有危险。

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。