John Wright and I used to keep a very good list of open problems, but recently, we stopped, because there are just too many.
我和JohnWright曾经保持了一个很好的问题清单，但最近我们不这样做了，因为可以列的问题太多了。
“I have a tradition,” Ma says, “starting when I was a student with my adviser at Berkeley. We tried to maintain a list of open problems.
“当我在伯克利大学求学的时候就养成了一个习惯”，马毅说：“我和导师会试着一直保持一个有待解决的问题清单。
It is well known that symmetry breaking and quark confinement are two open problems in theoretical physics.
众所周知，对称性破缺与夸克禁闭问题是理论物理中悬而未决的两大疑难。
Finally the gist and the open problems of the hierarchical framework are outlined.
最后总结了分层递阶框架的要点并提出了基于该框架的进一步研究工作。
Then we introduce models, categories, key technologies, open problems and remarks of e-cash system.
然后介绍了电子现金系统的模型、分类、关键技术、存在的问题及述评。
Thus the paper also gives some proper explanation to the two open problems of the spreading models for network viruses.
基于该结论文章对长期以来困扰网络病毒传播模型的两个公开的问题给出了合理的解释。
Part 2 describes the current situation of geometric theory, including the research problems, main results and open problems.
第二部分介绍几何理论的现状；主要研究方向，进展情况以及尚待解决的问题。
Recent results on primitive graphs and on the cyclability of cubic graphs are reviewed and several open problems are proposed.
本文综述关于原始图与三次图的可圈度的近期结果并提出一些未解决的问题。
Realistic 3d face modeling and animation is the research focus in computer graphics and computer vision, and has many challenging open problems.
真实感三维人脸建模和人脸动画是计算机图形学、计算机视觉领域最根本、最困难的问题之一，也是近年来国际上最活跃的研究热点。
With the discussions of some of the recent results on kinematics, dynamics, performance analysis, the open problems in parallel manipulator research are identified.
本文根据掌握的大量并联机器人文献，对其在运动学、动力学、机构性能分析等方面的主要研究成果、进展以及尚未解决的问题进行了阐述。
This paper discusses the essential concepts, the procedure of Mining Association Rules, an active field in KDD (Knowledge Discovery in Database), as well as the open problems faced in this field.
围绕KDD的一个重要发现任务——关联规则发现，介绍了这一领域基本概念、处理技术以及面临的问题。
Open Problems in Mathematical Systems and Control Theory.
有关数学系统和控制理论方面的公开问题。
Open Problems in Mathematical Systems and Control Theory.
有关数学系统和控制理论方面的公开问题。
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