浅谈气相色谱分析中甲烷的线性问题

为了满足不同气源的宽范围的甲烷含量都能精准地用气相色谱仪进行检测，对甲烷在宽范围内的线性进行了测试，结果显示甲烷具有很好的线性。     

网上非教学支持的再认识及实现途径

网上远程教育成功与否很大程度上是基于教育资源的效果认知及其交互中的情感价值。完善和促进网上非教学支持旨在实现教与学的和谐统一,这对于解决网上教学中的师生冲突,构建远程开放的学习者学习支持模式和实现学习者的终身学习具有深远的意义。而提升教师的网上非教学支持活动能力,开发建设网络教学支持服务项目,转变学习支持方式,优化网上非教学支持环境,是提高网上非教学支持效果及实现网上非教学支持的有效途径。     

New and little‐known species of Didemnidae (Ascidiacea,Tunicata) from Australia (Part 3)

The majority of the 58 species discussed, including 10 new species, were collected by scuba divers at 5–10?m in waters around Australia. Species are from Leptoclinides (11), Polysyncraton (11), Didemnum (19), Trididemnum (7), Lissoclinum (8), Clitella (1), and Diplosoma (1), and new species are in all except Trididemnum and Diplosoma. Additional characters (including a pyloric vesicle reported previously in the Holozoidae and several unrelated didemnid taxa) have been detected for the monotypic genus Clitella Kott, , which is recorded for only the second time. A review of known Australian ascidian species confirms the Didemnidae as the most speciose ascidian family in these waters. In this family, there appears not to be appreciable gene flow between tropical and temperate waters and few species have a continuous tropical–temperate range. A preponderance of Western Pacific non‐indigenous species is in the north, while indigenous species, some probably isolated from related tropical ones, are dominant in the temperate waters of the southern half of the continent. Although intraspecific variation and convergence obscures species differences, some aspects of the living organisms detected in in situ photographs contribute to identification. Keys to Australian didemnid species described since the publication of the Australian Ascidiacea part 4, Didemnidae (Kott ) are included.     

菏泽学院物理系提升非师范毕业生就业竞争力的探索

从适应社会需求出发，菏泽学院物理系注重培养非师范生动手操作、创新和人际交往能力，以提高其就业竞争力．主要途径如下：成立科技创新实验室；组织学生参加暑期三下乡和电子技术竞技比赛活动；开辟校企合作基地等．上述探索和实践取得了显著成效，非师范毕业生就业状况良好．     

Forecasting regional house price inflation: a comparison between dynamic factor models and vector autoregressive models

This paper uses the dynamic factor model framework, which accommodates a large cross‐section of macroeconomic time series, for forecasting regional house price inflation. In this study, we forecast house price inflation for five metropolitan areas of South Africa using principal components obtained from 282 quarterly macroeconomic time series in the period 1980:1 to 2006:4. The results, based on the root mean square errors of one to four quarters ahead out‐of‐sample forecasts over the period 2001:1 to 2006:4 indicate that, in the majority of the cases, the Dynamic Factor Model statistically outperforms the vector autoregressive models, using both the classical and the Bayesian treatments. We also consider spatial and non‐spatial specifications. Our results indicate that macroeconomic fundamentals in forecasting house price inflation are important. Copyright © 2010 John Wiley & Sons, Ltd.     

A Method on Non-Linear Correction of Broadband LFMCW Signal Utilizing Its Relative Sweep Non-Linear Error

1. INTaODUCTIONLinear frequency modulation continuous wave (LFMCW) radar with broadband has a high range Precisinlland high resollltion because of its large time bandwidth product and has no blind range at the'sarne take.LFMCW radax has more extensive applications in many fields such as microwave ranging, crashworthy car, andmissile's terminal guidance because broadband LFMCW devices are being miniaturized and integrated with therapid developmellt of microwave and millimeter wave ill…     

a阶时延逆系统的小波神经网络实现

研究采用小波神经网络（WNN）构造a阶时延逆系统的工程实现问题，并给出了a阶时延逆系统小波神经网络存在的充分条件。文中利用小波具有的时频局域化特性，完成小波神经网络的初始化，并去除网络中大量不必要的节点，使网络大大简化。仿真研究表明，该方法对a阶时延逆系统的实现具有良好效果。     

Normalized transfer function for characterizing conversion efficiency and harmonic distortion of all-optical sampling

A novel method for characterizing the nonlinearity of all-optical sampling is proposed based on the normalized transfer function.Simulation results demonstrate the effectiveness of our method.Furthermore,an all-optical sampling experiment is performed to verify our method.Both simulation and experiment show consistency between our method and the measurements.The method only requires normalization and polynomial fitting of the transfer curve,and enables direct expression of the nonlinearity with the coefficients of the normalized transfer function.     

复合催干剂的研制

介绍了五种三元复合催干剂的制备及在醇酸清漆中的性能 ,结果表明该复合催干剂性能优异 ,可代替传统的钴锰铅钙锌五元体系 ,并简化工艺 ,降低成本 ,其中环保无铅化配方值得大力推广。     

数学解释初探

文中阐述了数学解释的含义及作用，所谓数学解释，就是以某种方法对数学某一分支或者构成它的成分，诸如概念，命题，公式，符号等所赋予的各种意义的总和，数学解释在建立理论，理解理论和应用理论的过程中都有着重要作用。