Long-distance quantum communication with atomic ensembles and linear optics.

Quantum communication holds promise for absolutely secure transmission of secret messages and the faithful transfer of unknown quantum states. Photonic channels appear to be very attractive for the physical implementation of quantum communication. However, owing to losses and decoherence in the channel, the communication fidelity decreases exponentially with the channel length. Here we describe a scheme that allows the implementation of robust quantum communication over long lossy channels. The scheme involves laser manipulation of atomic ensembles, beam splitters, and single-photon detectors with moderate efficiencies, and is therefore compatible with current experimental technology. We show that the communication efficiency scales polynomially with the channel length, and hence the scheme should be operable over very long distances.     

Advances in interspecific pregnancy

Interspecific pregnancy in which the conceptus and female carrying the pregnancy are of different species is a key step to interspecific cloning. Cloning endangered animals by interspecific pregnancy is such a highlight catching people’s eyes nowadays. In this article, the history of interspecific pregnancy, the methods for establishment of interspecific pregnancy, the corresponding theories, barriers and applied prospects are reviewed. These authors contributed equally to this work.     

Solution Properties of Soy Protein in DMSO/Urea Solvent System

Solution properties of 7S globulins （7S）, 11S globulins （11S） and soy protein isolates （SPI） in dimethylsulfoxide （DMSO）/urea solvent system were studied by intrinsic viscosity and particle size distributions. The results showed that the existence of urea was the main reason for the denaturation and solubility of soy protein in the system, and the effects were more obvious with increasing of urea concentration in solutions. Suitably dissolution temperature and time contributed to the solubility of soy proteins.     

问题与对策：提高本科毕业论文（设计）质量的思考

普通本科院校在大学生就业压力、高校扩招、生源质量下降及教育质量管理等因素的影响下，本科生毕业论文（设计）的质量普遍下降。影响毕业论文（设计）质量下降的主要原因一是高校内部教育教学管理上对毕业论文（设计）不够重视；二是包括大学生就业压力在内的社会问题冲击了大学生对毕业论文（设计）研究的积极性。文章认为提高毕业论文（设计）的质量一是要完善高校内部教育质量保障体系，强化质量管理意识：二是政府不断采取措施提高大学生的就业率，促使大学生专心学习。     

临海新近成陆地层钻孔灌注桩基础砂浆护筒护壁技术研究

利用水泥砂浆耐压、防水、铁丝网片固结砂浆、钢筋骨架整体受力的特点,制作了应用钢筋骨架水泥砂浆护筒,承受水土产生的圆周向均布侧压力,保证地质结构的平衡;将“外套钢护筒、内深埋钢筋骨架水泥砂浆护筒”技术应用于围海冲填新近成陆地段建设桥梁和其他构筑物钻孔灌注桩基础孔顶护壁.     

浅论建设项目设计阶段的造价控制

文章就设计各阶段的造价控制简要进行说明,主要论述了价值工程优选法在设计方案选择中的应用、限额设计方法在初步设计和施工图设计阶段的应用.     

化学专利文献的检索

本文对专利文献的各类检索工具作了概述，并介绍了利用德温特检索出版物、中国专利文献检索工具和美国化学文摘检索化学专利的方法     

电阻率层析成像和高精度磁测在防空洞勘察中的应用

利用电阻率层析成像法对防空洞进行探测,二维层析成像反演结果清楚地显示防空洞的位置和埋深.同时,利用高精度磁测进行了验证,获得防空洞可靠的走向延伸.两种地球物理探测方法的综合运用,在中国科学技术大学校园内的防空洞探测中取得非常满意的效果.     

用赏识的眼光看待聋生

人性中最本质的渴望,是得到别人的赞赏。文章结合特殊教育学校聋人班主任工作中的具体实践,阐述了赏识教育在聋校班主任工作中的重要意义、原则和具体方法。