HgBa2CuO2正常态1/f噪声行为的研究

我们在１００－３００Ｋ温度范围测量了ＨａＢａ２ＣｕＯ２（Ｈｇ－１２１２）相块材样品和不同质量的Ｈｇ－１２１２相薄膜样品,发现Ｈｇ－１２１２相膜的噪声温行为显示较强的样品个性。     

STUDY OF HIGH-LYING EXCITED STATES OF RARE-EARTH ELEMENT Dy BY LASER RESONANCE IONIZATION SPECTROSCOPY

This paper describes the investigation of high-excited states of Dy. which includes the measurement of high Rydberg states and autoionizing states, by means of laser resonance ionization spectroscopy (LRIS). Two high Rydberg series (n>40), 4f¹⁰(⁵I₈) 6sns and 4f¹⁰(⁵I₈) 6snd, have been obtained by exciting the state of 4f¹⁰(⁵I₈) 6s6p (³P⁰₂) ⁵I⁰₈ using two-step laser excitation-electric field ionization method. With the data obtained, we determined the first ionization potential of Dy. It is 47901.7±0.6 cm^-1, that is. about one order more accurate than the results given in the literature. Using the same technique, we found 97 autoionizing states by exciting the state of 4f⁹5d6s(⁷H⁰₇).     

我国货物买卖合同的国际化走向

入世以后 ,我国国际货物买卖合同与国际通则不相符的矛盾更加突出。认真研究《国际销售示范合同》的特点以及对我国国际货物买卖合同的国际化影响 ,迫在眉睫     

从极优基未必能迅达最优基：兼与文献[1]作者商榷

本对献[1]提出的“求解线性规划的快速换基迭代法”从多阶段决策的观点阐述并举证了从极优基未必能快速到达最优基的论断。旨在说明用此方法求解一般线性规划问题时不一定能实现快速换基迭代的概念。     

来自自然界的可再生能源-生物质乙醇重整制氢

在镧系金属氧化物载镍催化剂上通过催化重整乙醇和乙醇水溶液可以直接转化为H2，H2的选择性达到60％，乙醇的转化率达到100％。优化催化剂及降低重整反应的温度以使水汽转化反应同时发生来降低产物气中CO的含量。该过程对于生产小型燃料电池的低成本燃料H2，以及便携燃料电池系统需要液态燃料存储的应用具有巨大的潜在价值。     

高职新闻教育存在的问题与对策研究

实践能力是高职院校新闻专业学生立足于社会、与普通高校新闻专业本科生竞争的重要法宝。然而，在高职新闻教育过程中，我们不难发现，高职院校新闻专业培养出来的学生的竞争力相对较弱，这与现阶段新闻教育的实施与发展有很大的关系。本文就高职院校新闻教育现状进行分析，提出对策，以促进高职新闻教育的发展。     

关于《电路基本分析》中的替代定理问题的讨论

本文主要是对"替代定理"在中国版本图书馆CIP数据核字(2000)第29001号《电路基本分析》一书的内容及其应用进行分析,并提出自己的个人观点。     

V-BLAST-based demodulate-and-forward two-way relaying： protocol design and the detection

We propose a novel vertical Bell Laboratories layered space-time (V-BLAST) based two-way relaying protocol that comprises two user terminals and one multi-antenna demodulate-and-forward (DMF) relay station. We consider the situation when these two user terminals employ different modulation types and investigate its detection techniques. The key feature of the detection techniques is that we quantify decision reliability at the relay station by introducing a so-called normalized correlation coefficient (CORR), rather than having full confidence in demodulation at the relay station. With the assistance of the normalized correlation coefficient, we develop detection methods at both the relay station and user terminals. In particular, we propose a CORR-based ordering algorithm at the relay station which can be applied to detection for general V-BLAST architectures. Simulation results demonstrate the superiority of the CORR-based ordering algorithm over the conventional signal-to-noise based ordering algorithm. Finally, we demonstrate overall error-performance of the V-BLAST-based DMF two-way relaying protocol via simulations.     

统计学教育改革的探讨

本文从统计学的基本发展趋势谈一谈统计教育急需改革的几个方面。     

提高汽车覆盖件拉延模的硬度

大型模具所选用铸铁材料的硬度低很,在生产中容易造成产品质量问题,必须经常修复模具才能保持生产的正常进行,所以必需提高磨具的硬度才能保证生产的正常进行.我们为提高磨具硬度对磨具表面采用火焰淬火.