论网络教育对传统教育的影响

本主要论述了网络教育的时代性、网络教育的特点和目前存在不足，以及网络教育的未来发展趋势。本最后得出结论认为：网络教育作为一种辅助方式，对传统方式影响很大，但仍不能动摇其主导地位。     

基于集总电感传输线建模的控制系统数字仿真

应用集总电感元件的传输线建模方法(TLM)构造了一种基于数值求解微分方程的数字仿真算法。通过把状态变量对应于电感中的电流，利用电感元件的传输线模型得到状态方程的仿真模型来实现控制系统的数字仿真计算。由于TLM方法是以传输线的等效无源线性网络作为建模基础，从而使算法具有无条件的数值稳定性。     

KosnioWski-Stong公式的一个简单证明

Kosniowski-Stong公式是近年来带对合协边领域的一个较重要的结果，它来源于Atiyah与Singer在指标定理方面的工作。此公式现有2种证明方法，其中属于带对合协边理论的是一种验算性质的证明。现利用带对合协边理论基本定理直接导出了此公式，由此可看出这2个重要结果是紧密相连的。     

电子期刊及其服务

论述了电子期刊的各类及其主要特点，分析了电子期刊对传统图书馆服务的影响，提出了图书馆工作的应对对策。     

光周期对环青春期雄性根田鼠血浆睾酮及雌二醇含量的作用

根田鼠母体妊娠期（GP）及哺乳期（LP）光周期处理对环青春期雄体血浆睾酮的作用不显著（P＞0．05）；在断乳期（PP），光周期处理则存在极显著的作用（P＜0．01）。在断乳前的GP及LP，母体长光照处理对子代雄体睾酮有抑制作用；而在PP，长光照处理对子代雄体睾酮则有显著促进作用。在LP，母体长光照处理对雄体血浆雄二醇有显著（P＜0．05）促进作用。而在PP，长光周期处理对雄体血浆雌二醇则有抑制作用。     

Seasonality in human sleep.

The timing of sleep and sleep EEG parameters in 10 healthy male subjects were investigated in four seasons under controlled conditions. The phase of nocturnal sleep was delayed about one and a half hours in winter as compared to that in summer. The duration of stage 4 sleep decreased and REM sleep increased significantly in winter compared with summer. The seasonality in the timing of sleep can be explained by photoperiodic time cues, but the changes in sleep EEG parameters are difficult to explain in terms of photoperiod.     

DNA fingerprinting transforms the art of cell authentication.

The increasing diversity of new cell cultures is seriously stretching the capabilities of traditional methods of identification. DNA fingerprinting is set to play an important role in increasing confidence in the authenticity of cultures in research and industry.     

胆红素提取方法的新探索

胆红素是制工业的贵重原料，可人工合成牛黄。合成牛黄的胆红素要求质量较高，因此探索胆红素的提取方法，具有重要的科学价值和经济利益。改进制备胆红素钙盐、酸化、精制等阶段，使胆红素产率和纯度都有明显提高。     

The failing heart.

Cardiomyopathies are disorders affecting heart muscle that usually result in inadequate pumping of the heart. They are the most common cause of heart failure and each year kill more than 10,000 people in the United States. In recent years, there have been breakthroughs in understanding the molecular mechanisms involved in this group of conditions, with knowledge of the genetic basis for cardiomyopathies perhaps seeing the largest advance, enabling clinicians to devise improved diagnostic strategies and preparing the stage for new therapies.