Quantum algorithms: A?survey of some recent results

Quantum algorithms are a field of growing interest within the theoretical computer science as well as the physics community. Surprisingly, although the number of researchers working on the subject is ever-increasing, the number of quantum algorithms found so far is quite small. In fact, the task of designing new quantum algorithms has been proven to be extremely difficult. In this paper we give an overview of the known quantum algorithms and briefly describe the underlying ideas. Roughly, the algorithms presented are divided into hidden subgroup type algorithms and in amplitude amplification type algorithms. While the former deal with problems of group-theoretical nature and have the promise to yield strong separations of classical and quantum algorithms, the latter have been proved to be a prolific source of algorithms in which a polynomial speed-up as compared to classical algorithms can be achieved. We also discuss quantum algorithms which do not fall under these two categories and give a survey of techniques of general interest in quantum computing such as adiabatic computing, lower bounds for quantum algorithms, and quantum interactive proofs.     

从儿童语言发展的视角关注学前聋童双语教育

语言发展问题是聋教育中的核心问题,从儿童语言发展的视角关注聋双语教育中的语言问题,明确学前双语教育中语言教育的目标十分重要。聋童的特殊性、复杂性,需要我们在语言教学中制定个别教育计划,实行科学的分层教学。同时有效地进行聋童早期手语语言开发,为聋童的小学学习生活打下基础。     

固体物料的浆液管道输送

本文介绍了本世纪50年代发展起来的一种新的运输方式——固体物料的浆液管道输送。简述了世界主要各国应用这种运输方式的发展概况和现状。提出了浆液管道输送的优缺点。为了更广泛地应用和发展这种运输方式,本文还着重归纳了国内外正在进行和应该着手进行的若干研究课题及研究方向。     

Meta-analysis: a tool for medical and scientific discoveries.

Medicine has made increasing use of meta-analysis, largely as a quantitative procedure for combining results of clinical trials. Meta-analysis begins with a comprehensive review of the literature. The next step is a systematic analysis of the quality and content of each study. Finally, results are combined statistically and conclusions are drawn from this new overview of the data. This paper presents a brief historical perspective on the use of meta-analysis in medicine with emphasis on the medical library. The authors conclude that in the future, medical librarians will play a significant role in the application of this useful technique.     

广播电视语言语音手段与歧义分解

一个句子赋予不同的语音结构模式可以表达不同的意义,广播电视语言可以利用语音手段--停顿和延连、轻音和重音、声调和句调等超语段成分消除歧义.本文对音义结构关系进行了多方面的分析考察,总结归纳出了广播电视语言歧义语言分解的一些特点和规律.     

Chaos theory, informational needs, and natural disasters

This study applies chaos theory to a system-wide analysis of crisis communication in a natural disaster. Specifically, we analyze crisis communication during the 1997 Red River Valley flood in Minnesota and North Dakota. This flood, among the worst in modern American history, consumed entire metropolitan areas, displacing thousands of people. The conditions and decisions leading to the disaster, and the subsequent reactions are retraced. Communication related to river crest predictions (fractals), the shock at the magnitude of the crisis (cosmology episode), novel forms of reorganizing (self-organization), and agencies that aided in establishing a renewed order (strange attractors) are evaluated. Ultimately, we argue that preexisting sensemaking structures favoring rationalized, traditional views of a complex system led officials to make inappropriately unequivocal predictions and ultimately diminished the effectiveness of the region's crisis communication and planning.     

从九运会看我国体操运动的现状——谈雅典奥运会备战策略

九运会后，中国体操队将进入雅典奥运会备战期。本届全运会体操比赛，实际上是实施新规则后对中国体操实力的一个全面检阅。悉尼奥运会后，体操管理中心定出了雅典奥运会的基本目标。从九运会比赛的水平来看，完成比赛目标的可能性很大，但女子水平滑坡，弱项仍弱的痼疾仍在，要在新规则的引导下进一步调整选材和训练思路，全力备战雅典奥运会。     

排球扣球技术难点教学探讨

对扣球技术难点教学进行分析 ,采用具有针对性 ,合理的教学手段、方法 ,在教学时数内 ,使学生完全掌握 ,灵活应用扣球技术 ,提高教学效果和课堂教学质量。     

少年男子花样滑冰运动员竞赛期的心理指导

通过对少年男子花样滑冰运动员竞赛期心理特点的分析，探索在竞赛期对少年花样滑冰运动员进行心理指导的方法，使花样滑冰运动员从小形成良好的比赛心理状态，旨在为提高我国花样滑冰运动整体水平提供保证。